YMPC-F/EX

Cooling Capacities106 kW to 352 kWHeating Capacities86 kW to 286 kW

MINI-PARAFLOW ABSORPTION CHILLER/HEATER

ENGINEERING GUIDE

156-EG-100 Rev. 1

(10/03) GB

Table of Contents

1 York Mini ParaFlow AbsorptionChiller-Heaters Model YMPC-F/EX

1.1 Standard Heating Capability 1.1

1.2 Environmental Considerations 1.1

1.3 Indoor or Outdoor Location 1.1

1.4 Unique Automatic Purge System withoutPeriodic Operator Service 1.1

1.5 Advanced Control System 1.1

1.6 York Unique “Parallel Flow” StabilisesOperation 1.1

1.7 New High Efficient and EnvironmentalFriendly Corrosion Inhibitor 1.2

1.8 Cooling Water Entering Temperature –No Control required above 15°C 1.2

1.9 No Operator Qualifications required 1.2

1.10 Nomenclature 1.2

2 TECHNICAL DATA

3 OPERATION

3.1 Cooling Mode 3.1

3.2 Heating Mode 3.2

4 PRODUCT FEATURES

4.1 Part Load Characteristics 4.1

4.2 Capacity vs. Chilled Water SupplyTemperature 4.1

4.3 Capacity Control System 4.1

4.4 Characteristics of the Capacity Control 4.1

4.5 RS Proportional Control (RefrigerantStorage Proportional Control) 4.2

5 LIMITATIONS

5.1 General Limitations 5.1

5.2 Chilled/Hot Water and Cooling Waterflow Limitations 5.1

5.3 Firing Rate Limitations 5.1

6 APPLICATION INFORMATION

6.1 Application and Duration of Operation 6.1

6.2 Precautions for Dilution Operation andPrevention of Trouble 6.2

6.2.1 Necessity of Dilution Operation

6.3 Precautions for Cooling Operation in Winter 6.3

6.4 Control of Water Quality 6.3

6.5 Air-borne Noise (Reference Values) 6.4

6.5.1 Noise Measuring Points

6.5.2 Sound Pressure Levels (dB(A))

6.5.3 Position of the Measuring Points

6.5.4 Frequency Analysis

6.6 Structure-borne Noise 6.6

6.7 Manual Changeover Summer / Winter 6.6

6.8 Basic Electrical Connections 6.7

7 OPERATION

7.1 Operating Control 7.1

7.1.1 Starting

7.1.2 Stopping

7.1.3 Cooling/Heating Capacity Control

7.1.4 Safety Shutdown

8 INSTALLATION

8.1 General 8.1

8.2 Location 8.1

8.3 Delivery, Rigging and Installation 8.5

8.3.1 Delivery

8.3.2 Removing the Packaging

8.3.3 Lifting the YMPC-F/EX

8.3.4 Installation of the YMPC-F/EX

8.3.5 Levelling of the Absorption Chiller/Heater

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156-EG-100 Rev. 1 I-i

9 WATER CIRCUITS – GENERALRECOMMENDATIONS

9.1 Scope of Delivery 9.1

9.2 Flow Rate 9.1

9.3 Chilled Water Temperatures 9.1

9.4 Water Quality 9.1

9.5 General 9.1

9.6 Chilled/Hot Water Circuit 9.2

9.7 Calculation of the Chilled Water BufferVolume 9.2

9.8 Cooling Water Circuit 9.3

9.9 Water Piping 9.3

9.10 Cooling Water Temperature Controland Interlock with Auxiliary Equipment 9.5

9.10.1 Cooling Water Temperature Control

9.11 Interlocked Operation of Chilled/HotWater Pump, Cooling Water Pump andCooling Tower Fan 9.5

9.12 Expansion Tank 9.5

10 AUTOMATIC PURGE SYSTEM

10.1 Purge Operation 10.1

10.2 Purge Drain System 10.1

11 FUEL PIPING

11.1 Gas 11.1

11.1.1 Precautions for installation

11.2 Fuel Oil 11.2

11.2.1 Precautions for Installation

11.2.2 Precautions for Use of a WaterChiller/Heater Unit with Fuel Oil

11.2.3 Fuel Tank

11.3 Connecting the Exhaust Gas to theExhaust Duct of the Building 11.4

11.3.1 Precautions for Installation

11.3.2 Precautions for use of a CommonStack for Absorption Chiller/HeaterUnit and Emergency Power Generating Unit

12 CHECK LIST FOR INSTALLATION

(10/03)

I-ii 156-EG-100 Rev. 1

1 York Mini ParaFlow Absorption Chiller-Heaters Model YMPC-F/EX

Outline and Features

York model YMPC-F/EX is a series of absorptionchiller-heater units having a nominal cooling capacityrange of 106 kW to 352 kW. The nominal heatingcapacity range is 86 to 286 kW.

All models in this series have the following features:

� Standard heating mode

� Environmental considerations

� Indoor or outdoor location

� Unique automatic purge system without periodicoperator service

� Advanced control system

1.1 Standard Heating Capability

Every unit can be switched to heating operation duringthe heating season. The hot water outlet temperaturemay be as high as 60°C. This feature is advantageous in2-pipe systems.

1.2 Environmental Considerations

This range of absorption units use the mostenvironmentally clean refrigerant – WATER.

They can be operated by either natural gas or fuel oil.

Traditional electrically driven chillers generally usehalogenated refrigerants, which can cause ozonedepletion and have a high global warming potential.

The YMPC-F/EX using natural gas emits only80mg/kWh (40ppm) of nitrogen oxide and 200mg/kWh(100ppm) when using fuel oil.

1.3 Indoor or Outdoor Location

Units can either be located in a plant room or outside, atground level or on a roof, in areas not susceptible tofreezing conditions.

The unit casing is rigid and has weather resistantpanels. It is equipped with sliding access doors toreduce the operating and maintenance space. Multipleunits can be installed 50 mm apart.

1.4 Unique Automatic Purge System withoutPeriodic Operator Service

These units are manufactured extremely tight as theyare working in a very high vacuum condition. Ifnon-condensable gases are generated, during unitoperation, they are constantly stored in an externalpurge chamber. If the quantity reaches a pre-set level asensor automatically activates a water ejector typepurging system. Accordingly, the performance of thesystem is established at a constant high level. Inaddition no time consuming periodic purging isnecessary by the operating personnel.

1.5 Advanced Control System

The Mini-Paraflow has excellent part load performanceas a result of the refrigerant storage load proportionalcontrol (RS proportional control), which is incorporatedto provide stable control and reduced energyconsumption. Absorption systems have a unique heatstorage capability created by concentration difference.

York's unique RS proportional control manages thecooling capacity and utilises the storage capability to itshighest extent. The control cycles the burner, but keepsthe solution and refrigerant pump in continuousoperation to transfer the residual heat of the generatorsinto useful cooling capacity. This results in the saving oflarge amounts of energy that would normally be wastedby the cycling of the unit.

1.6 York Unique “Parallel Flow” StabilisesOperation

The diluted solution in the absorber is delivered by thesolution pump and divided into two flows, which are sentindependently to the first stage generator and to thesecond stage generator. This arrangement is called“Parallel Flow”. Since the solution is divided and sent inparallel to the first and second stage generators, the firststage generator does not have to be installed in anupper position. It can be installed below the body of themain unit. For this reason, the size of the completesystem can be reduced. In addition the operatingpressure can be lowered by the “parallel flow” resultingin stable operation.

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156-EG-100 Rev. 1 1-1

1.7 New High Efficient and EnvironmentalFriendly Corrosion Inhibitor

By use of the improved inhibitor corrosion is extremelyreduced and all fluids in the unit are environmentfriendly.

1.8 Cooling Water Entering Temperature – NoControl required above 15°C

An additional tank, to store additional refrigerant, isattached to the evaporator to enable all the refrigerantvapour generated in the generator to be completelyused for cooling operation. This also ensures that stableoperation is established even if the cooling watertemperature at absorber inlet drops. Accordingly, thecooling water temperature does not need to becontrolled during the normal operating period.

Since cooling efficiency increases with lowering coolingwater temperature, it is recommended not to control thecooling water temperature, during the normal operatingperiod, if the cooling water temperature at the inlet isabove 15°C.

As refrigerant circulation varies by the influence of thetemperature change of the chilled water and coolingwater, more energy is saved.

1.9 No Operator Qualifications required

The unit operates in vacuum conditions and as it is notregulated as a boiler no special qualifications arerequired to operate this equipment.

1.10 Nomenclature

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1-2 156-EG-100 Rev. 1

– – – –

Electrical Supply400 V - 3 Ø - 50 Hz + PE

Energy Source

FE = Direct fired natural gaswith Weishaupt burner

FB = Direct fired number 2 oilwith Weishaupt burner

YORK Mini ParaFlow Chiller

Modification Level

Size 3 EX to 10 EX

50YMPC FE A3EX

2 TECHNICAL DATA

(10/03)

156-EG-100 Rev. 1 2-1

3 EX 4 EX 5 EX 6 EX 7 EX 8 EX 10 EXNominal Cooling Capacity kW 106 141 176 211 246 281 352Nominal Heating Capacity kW 86 114 143 172 200 229 286

Chilled Water Return °C 12.5Temperature Supply °C 7.0min. Chilled Water Supply °C 7.0

Chilled/ Hot Water Return °C 55.5Hot Temperature Supply °C 60.0Water Nominal Flow l/s 4.58 6.11 7.64 9.16 10.69 12.22 15.27

Permissible Flow Tolerance + 20%Fouling Factor m²K/kW 0.044Pressure Drop kPa 58 51 56 76 62 44 42Design Working Pressure kPa 780

Heat Rejection kW 191 255 319 383 446 510 637Cooling Water Entering °C 29 (32) 29 (32) 29 (32) 29 (32) 29 (32) 29 (32) 29 (32)Temperature Leaving °C 35 (38) 35 (38) 35 (38) 35 (38) 35 (38) 35 (38) 35 (38)min. Tower Water Inlet °C 15.0

Cooling Nominal Flow l/s 7.62 10.15 12.70 15.23 17.77 20.32 25.38Water Permissible Flow Tolerance - 0 / + 20 %

Fouling Factor m²K/kW 0.044Pressure Drop kPa 69 49 71 46 69 69 76Design Working Pressure kPa 490Possible Fuels Natural Gas, Fuel Oil

Fuel Consumption Cooling kW LHV 93 (98) 124 (131) 156 (164) 187 (196) 217 (228) 248 (260) 311 (327)Consumption Heating kW LHV 96 127 160 192 223 255 320Supply 400 V / 3 Ø / 50 Hz

Electrical Power Inputw. Natural Gas Cool/Heat kW Input 1.87/0.92 2.27/1.32 2.47/1.52 2.47/1.52 2.73/1.78 3.71/2.76 4.03/3.08w. Fuel Oil Cool/Heat kW Input 2.07/1.12 2.47/1.52 2.47/1.52 2.79/1.84 3.05/2.10 4.03/3.08 4.03/3.08

Capacity Control Natural Gas % Proportional 30 – 100 %Fuel Oil % 0/50/100

Burner Design Forced Draft BurnerIgnition Direct SparkFlame Sensor Photo Resistor (Natural Gas), Ionisation Rod (No. 2 Oil)Chilled/Hot Water DN (mm) 50 65 65 65 80 80 100

Connection Cooling Water DN (mm) 65 80 80 80 100 100 125Size Drain from Purge DN (mm) ½“ ½“ ½“ ½“ ½“ ½“ ½“

Natural Gas DN (mm) 40 50 50 50 50 50 50No. 2 Oil DN ¼“ ¼“ ¼“ ¼“ ¼“ ¼“ ¼“Exhaust Gas DN (mm) 150 150 150 150 200 200 200

Sound Pressure Level at 1 m Distance dB(A) 64 64 64 67 71 72 76Casing Length mm 1990 1990 1990 2160 2450 2450 2450

Dimensions Length Including Exhaust mm 2340 2340 2340 2580 2870 2870 2970Width mm 1450 1450 1450 1530 1550 1550 1680Height mm 1960 1960 1960 2030 2030 2030 2030Lifting kg 2430 2720 2830 3140 3720 3850 4500

Weights Operation kg 2550 2920 3020 3340 3940 4080 4790Emergency kg 3720 4880 4980 5300 6250 6720 7590CasingBody and Control Panel

1. Fouling factor 0.044 m2K/kW for chilled/hot water and cooling water.2. Maximum working pressure chilled/hot water 780 kPa (8 bar g).3. Maximum working pressure cooling water 490 kPa (5 bar g).

7. The emergency weight is the maximum weight which results when an externally induced rupture of a heat exchanger6. Operation can be continued even if the cooling water inlet temperature lowers to 15°C. If the cooling water inlet temperature

Model YMPC-F

Notes

4. Natural gas consumption calculated on the basis of low heating valve (LHV) 37,260 kJ/m3. Other lower heating valves willchange the consumption proportionally.

5. Oil no. 2 (Heizöl EL) consumption calculated on the basis of low heating valve (LHV) 42,700 kJ/kg (11.86 kWh.kg),(specific gravity 0.835) or 36,000 kJ/liter (10 kWh/litre).

Finish (Paintwork)Munsell 3Y 4.2/0.1 (RAL 7039)

Munsell 5Y 7/1 (RAL 7044)

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2-2 156-EG-100 Rev. 1

3 OPERATION

3.1 Cooling Mode

The YORK YMPC-F/EX high efficiency two-stageabsorption refrigeration cycle uses water as therefrigerant and lithium bromide as the absorbent. It is thestrong affinity between these two substances thatestablishes the cooling cycle as follows:

1. Solution Pump and Heat Exchangers: A dilutedlithium bromide and water solution is pumped fromthe absorber to two Solution Heat Exchangers andsplits into two streams to supply the 1st stageGenerator and the 2nd Stage Generator. Thisvirtually eliminates the possibility of crystallisationby allowing the unit to operate at low solutionconcentrations and temperatures.

2. 1st Stage Generator: The diluted lithium bromideis heated, by a gas or oil fired burner, to produce ahigh temperature refrigerant vapour.

3. 2nd stage Generator: The refrigerant vapour,from the 1st Stage Generator, passes into thetubes of the 2nd stage Generator. Diluted solution,from the Solution Heat Exchanger, is sprayed overthe tubes and heated. This produces 40%additional refrigerant vapour, above that producedin that 1st stage Generator, at no additionaloperating cost. The concentrated solution that isleft, after evaporation, is returned to the SolutionHeat Exchanger. The refrigerant vapour passes tothe Condenser.

4. Condenser: The refrigerant vapour, from the 2ndStage Generator, is condensed by the CoolingTower water, passing through the condensertubes.

5. Evaporator: The refrigerant liquid, produced at the2nd Stage Generator and Condenser, flows downinto the Evaporator via a metering valve. Therefrigerant from the evaporator pan is sprayed, as afine mist, over the evaporator tubes. Due to theextreme vacuum, created by hygroscopic action,some of the refrigerant liquid vaporises creating arefrigeration effect that cools the chilled water in theevaporator tubes.

6. Absorber: A concentrated solution, from theSolution Heat Exchangers, is sprayed onto thedescending liquid/vapour refrigerant. Thehygroscopic action between lithium bromide andwater create an extreme vacuum in the Evaporatorabove. As the lithium bromide dissolves in thewater it releases heat which is cooled by theCooling Tower water in the Absorber tubes.

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156-EG-100 Rev. 1 3-1

Cooling Cycle

3.2

Heating Mode

1. 1st Stage Generator: An intermediate lithiumbromide and water solution is heated, by a gas oroil fired burner, to produce a high temperaturerefrigerant vapour which passes through thebypass line to the Evaporator.

2. Evaporator: High temperature refrigerant vapourheats the water in the evaporator tubes andcondenses. The liquid refrigerant collects at thebase of the Evaporator and is returned to theabsorber section by an ejector.

3. Absorber: The solution pump returns therefrigerant from the absorber pan to the 1st StageGenerator to be heated and vaporised again.

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3-2 156-EG-100 Rev. 1

Heating Cycle

4 PRODUCT FEATURES

4.1 Part Load Characteristics

4.2 Capacity vs. Chilled Water SupplyTemperature

4.3 Capacity Control System

The capacity control of York YMPC-F/EX series is asfollows

4.4 Characteristics of the Capacity Control

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156-EG-100 Rev. 1 4-1

95

100

105

110

115

120

6 7 8 9 10 11 12

Chilled Water Supply Temperature [°C]

Co

olin

gC

apac

ity

[%]

Nominal Cooling Capacity Variation onChilled Water Supply Temperature

0

20

40

60

80

100

20 40 60 80 100Cooling Capacity [%]

Tower Water Entry 32°C

Tower Water Entry 27°C

Tower Water Entry 24°C

Average CurveSp

ecH

eat

Inp

ut

[%]

Part Load Performance Graph

Model Gas fired Oil firedYMPC-F Proportionally 3-Position Control

3 EX to 10 EX 100 to 30 % 100-50-0 %

Proportional Control (Gas Fired)

3-Position Control (Oil Fired)

4.5 RS Proportional Control (Refrigerant StorageProportional Control)

The refrigeration cycle of the York Mini ParaFlowAbsorption Chiller-Heater has cooling ability even afterthe drive heat is stopped, as long as the concentration ofthe lithium bromide water solution in the unit is high. Thiscould be simply expressed that heat that is stored in theunit during the start of firing can be extracted after theburner is turned off.

York applies the unique ability of the absorptionchiller-heater unit to control the chilled watertemperature. When the load drops below the minimumcontrol range, the drive heat source (combustion of gasor oil) is turned on and off, but the refrigerant pump iskept operating so that the cooling ability is utilised evenafter firing stops. Since the chilled water temperaturedoes not rise sharply but rises slowly, after firing stops,the system is most suitable for air-conditioningapplications.

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4-2 156-EG-100 Rev. 1

5 LIMITATIONS

5.1 General Limitations

5.2 Chilled/Hot Water and Cooling Water flow Limitations

5.3 Firing Rate Limitations

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156-EG-100 Rev. 1 5-1

ModelYMPC-F

F. R. P. D. F. R. P. D. F. R. P. D. F. R. P. D. F. R. P. D. F. R. P. D.l/s kPa l/s kPa l/s kPa l/s kPa l/s kPa l/s kPa

3 EX 3.25 29 4.58 58 6.17 105 5.33 33 7.62 69 9.83 1154 EX 4.67 29 6.11 51 8.83 107 8.33 33 10.15 49 15.67 1175 EX 5.50 29 7.64 56 10.50 106 8.67 33 12.70 71 16.33 1176 EX 5.58 28 9.16 76 10.58 102 12.83 32 15.23 46 24.17 1167 EX 7.67 31 10.69 62 14.58 115 12.17 32 17.77 69 23.00 1158 EX 10.50 32 12.22 44 18.33 99 14.00 32 20.32 69 25.00 104

10 EX 13.42 32 15.27 42 23.33 98 16.50 32 25.38 76 30.67 112

F. R. = Flow Rate P. D. = Pressure Drop

Chilled/Hot Water Cooling WaterMinimum Nominal MaximumMaximumNominalMinimum

Minimum MaximumAmbient Temperature Cooling Operation °C +5 +38

Heating Operation °C -15 +38Relative Humidity % r.h.Chilled Water Supply °C 7 12

Return °C 10 18Heating Water Return °C 40

Supply °C 60Tower Water Entering Nominal °C 24 32

Permissible, but chilled water supply temperature not constant °C 15 32mbar 20 (std) 300

Operation hours per year to achieve standard life cycle* hours

* For longer operating hours per year the capacity of the unit should be selected 20 % higher than the required capacity.

1500 to 2000

10 to 90

Gas Pressure

Model Firing RateYMPC-F/EX kW HHV

3EX 974EX 1295EX 1616EX 1947EX 2258EX 25810EX 323

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5-2 156-EG-100 Rev. 1

6 APPLICATION INFORMATION

6.1 Application and Duration of Operation

The York Mini ParaFlow Absorption Chiller-HeaterModel YMPC-F is designed to be used mainly for“General Air Conditioning” (Group A in the followingtable). Even if the operating time is longer and the load isheavier than in ”General Air Conditioning" defined, themodel YMPC-F/EX can be used conditionally. SeeGroup B1 in table below. Please consult your local Yorksales office.

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156-EG-100 Rev. 1 6-1

HeatingDaily Yearly

AGeneral AirConditioning

Office Buildings,Department Stores,Supermarkets

8 to 101000 to 2000.Below 2000

Daytime inwinter

B1Heavy LoadOperation

Installations, whichneed cooling dayand night, computerrooms

10 to 242000 to 4000.Below 4000

Short timein winter ifnecessary

B2Heavy LoadOperation

24 hours cooledcomputer rooms, 24hours cooledoperating theatres

10 to 242000 to 4000.Below 4000

Not used

CHeavy LoadOperation

24 hours cooledcomputer rooms,process cooling,constant coolingload installations

10 to 24 Above 4000 Not used

Notes:(1) Assumed average cooling load 60 %. Model selection for 100 %. Start/Stop frequency 5/day.(2) Assumed average cooling load 80 %. Model selection for 120 %. Start/Stop frequency 5/day.

The wording “Group”, “Typical Application” and “Duration of Operation” in this table conform to“Equipment for heavy load” by “Japan Refrigeration and Air Conditioning Industry Association".We do not recommend the use of models YMPC-F/EX for heavy loads of 4000 hours per yearfor computer rooms, hospital operating theatres, process cooling etc.To prevent a loss in any critical customer production or activities, due to an unexpected shutdownof the chiller-heater unit, a stand-by unit should be installed.

Each standard model is designed to be used for cooling and heating.When models YMPC-F/EX are used in a cooling mode in winter, the ambient temperature ofthe unit and the cooling water temperature must be kept within the stated limitations for cooling.If models YMPC-F/EX are used for heavy loads (Group B) the operating time is about twicethe standard value (Group A). Note that the lifecycle of the equipment, the maintenance intervalsand overhaul intervals are shortened as a result. To increase the lifecycle of the equipment to astandard value, select a model for at least 120 % of the project load. If the equipment is appliedfor Group B, an operating hour meter should be installed.

Duration of Operation (h)CoolingTypical ApplicationGroupApplication

Standard Application(1)

Restricted

Application (2)

Not Applicable

6.2 Precautions for Dilution Operation andPrevention of Trouble

6.2.1 Necessity of Dilution Operation

Generally an absorption refrigerating machinegenerates refrigeration by concentrating the solution(Lithium Bromide-water solution) through heating andsimultaneous evaporation of refrigerant (water) andabsorption of refrigerant (water). This cycle is performedcontinuously. It controls the capacity by adjusting theconcentration of the solution. If high concentratedlithium bromide-water solution, used as the absorbent,is cooled too low it crystallises. To prevent this thesolution needs to be diluted (its concentration needs tobe lowered) to a level at which it does not crystallisewhen the refrigeration cycle stops. The ability to cool ismaintained even during the dilution operation.

Install an interlock circuit to stop theabsorption chiller-heater unit, before stoppingthe air conditioning unit, to ensure that the airconditioning unit does not stop before dilutionis completed.

When fan coil units are used, with 2-way control valveson the secondary side, the estimated minimum quantityof water in the chilled water circuit should be as follows:

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6-2 156-EG-100 Rev. 1

Model CoolingYMPC-F Capacity Stop under Stop under

(kW) full load low load3 EX 106 2.7 1.34 EX 141 3.6 1.85 EX 176 4.6 2.26 EX 211 5.5 2.77 EX 246 6.4 3.18 EX 281 7.3 3.6

10 EX 352 9.1 4.4

Note: Chilled water temperature at stop is assumed to be 7°C.

Required Water volume of the Circuit (m³)

6.3 Precautions for Cooling Operation in Winter

The absorption models YMPC-F/EX are designed forcooling in summer and heating in winter. If YMPC-F/EXunits are installed outdoors they cannot be used forwinter cooling due to the fluids and conditions in the unit.However, when using an absorption chiller-heater forcooling in winter understand its design conditions andfollow the conditions stated below.

(1) In winter the outdoor conditions reduce to atemperature close ton the control safety set pointfor cooling operation. As a result, the safety andcontrol devices may react against the outdoortemperature, and the emergency stop system maybe turned on or the unit may not start. Take thefollowing measures to prevent such malfunctions.

Ensure that the ambient temperature around theabsorption chiller-heater unit is above + 5°C. It isrecommended that the unit is installed indoors.

Maintain the cooling water temperature above15°C. Since the outdoor temperature is low inwinter, it is difficult to maintain the cooling watertemperature above 15°C by only controlling theoperation of the cooling tower. In addition a changein the cooling water temperature causes fluctuationof the chilled water temperature at the outlet. It isrecommended that the cooling water temperatureis controlled by a 3-way valve to maintain it above15°C.

(2) Measures to prevent freezing of the chilled waterand cooling water systems shall be taken by thecustomer.

If antifreeze solution is used for the coolingwater system, the cooling capacity of theabsorption chiller-heater unit will be lowered.

(3) The operating time for heating in winter becomeslonger than the operating time of a common airconditioner and may become two to three times thestandard set value. As a result, if calculated simply,the service life will be shortened to ½ or 1/3. Themaintenance period, replacement period of parts,and overhaul periods will therefore also beshortened. In addition, a backup unit may berequired.

Select a model having a cooling capacity of 1.2 to1.3 times the required level.

We recommend that an “operating hour meter” isinstalled if the unit is used in this manner.

6.4 Control of Water Quality

Fouling and corrosion of the tubes in the evaporator,condenser, and absorber are affected by the quality ofwater used. Therefore the quality of the water used aschilled water and cooling water must be controlledcarefully.

If the water quality is very bad, the tubes will foul orcorrode and may need to be replaced after a short time.

Since the effect of the water quality on the tubes is verydelicate, the tubes, as well as the water quality, must bechecked periodically for fouling and corrosion to preventleaks.

Since the absorption chiller-heater unit is designed onthe assumption that the water quality is maintainedaccording to the German VDI 3803 governmentspecification for water quality the water quality shouldbe controlled according to this guide line.

Water quality standard values of cooling water andsupplied water:

The water to be supplied is assumed to be either citywater, industrial water or ground water. It is notassumed to be pure water, neutral water or softenedwater.

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156-EG-100 Rev. 1 6-3

Value Units Circulating Cooling WaterpH (at 25°C) pH 7.5 to 8.5Total salt content g/m³ < 1,800Electrical conductivity µS/cm < 2,200Calcium g/m³ > 20Carbonate hardness g/m³ < 4Chloride (Cl-) g/m³ < 200

Sulphate (SO42-) g/m³ < 325

KMNO4-consumption g/m³ < 100

Germination index ml-1 < 10,000Iron (Fe) g/m³ < 1.0

Sulphide (S2-) g/m³ 0Ammonium ions (NH4) g/m³ < 1.0

6.5 Air-borne Noise (Reference Values)

The main noise generated by the York ParaFlowYMPC-F/EX series is the combustion noise in the hightemperature generator. This noise is discharged fromthe unit by the exhaust duct and stack.

The noise generated while the solution and fluids arecirculating in the unit is emitted from the unit through thecasing.

The noise characteristics depend on the adjustment ofthe burner, adjustment of the unit cycle, installationconditions of gas duct and stack, and conditions of thelocation (weather condition, environmental condition).

External measurements must be performed by others ifa reduction of operating noise is required. Special caremust be taken not to negatively influence the air supplyto the burner and the venting openings of the unit.

Standard operating noise values are shown below forreference.

When using these values consider the following notes:

(1) The operating noise is for operation with standardratings at a distance of 1m from the front side of theunit and at a height of 1.5m at a location with verylow levels of sound reverberation.

(2) The operating noise may increase approximately3dB, if the operating conditions are different or theunit is operating at a location with normal soundreverberation.

6.5.1 Noise Measuring Points

6.5.2 Sound Pressure Levels (dB(A))

6.5.3 Position of the Measuring Points

6.5.4 Frequency Analysis

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6-4 156-EG-100 Rev. 1

ModelYMPC-F 1 2 3 4 5

3 EX 64 67 69 63 554 EX 64 69 72 64.5 555 EX 64 69 72 64.5 556 EX 67 69 73.5 67.5 54.57EX 71 70.5 75 68 608 EX 72 71.5 76 69 60

10 EX 76 75 79 74 60Measuring Point 5: Background Noise

Measuring Point

No. 1, 2 and 4 No. 3Position of Distance 1 m Distance 1 m

measuring point Height 1.5 m Height 2.5 m

0

10

20

30

40

50

60

70

80

90

1

Frequency [Hz]

31,5 63 125 250 500 1000 2000 4000 8000 16000

Background Noise No. 5

Measuring Point No. 1

Measuring Point No. 3

Wei

gh

ted

So

un

dP

ress

ure

[dB

(A)]

Model YMPC-F 3EX

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156-EG-100 Rev. 1 6-5

Wei

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ted

So

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dP

ress

ure

[dB

(A)]

0

10

20

30

40

50

60

70

80

90

1

Frequency [Hz]31,5 63 125 250 500 1000 2000 4000 8000 16000

Background Noise No. 5

Measuring Point No. 1

Measuring Point No. 3

Model YMPC-F 7 EX

Wei

gh

ted

So

un

dP

ress

ure

[dB

(A)]

0

10

20

30

40

50

60

70

80

90

1

Frequency [Hz]

31,5 63 125 250 500 1000 2000 4000 8000 16000

Background Noise No. 5

Measuring Point No. 1

Measuring Point No. 3

Model YMPC—F 6 EX

0

10

20

30

40

50

60

70

80

90

1

Frequency [Hz]31,5 63 125 250 500 1000 2000 4000 8000 16000

Background Noise No. 5

Measuring Point No. 1

Measuring Point No. 3

Wei

gh

ted

So

un

dP

ress

ure

[dB

(A)]

Model YMPC—F 5 EX

Wei

gh

ted

So

un

dP

ress

ure

[dB

(A)]

0

10

20

30

40

50

60

70

80

90

1

Frequency [Hz]31,5 63 125 250 500 1000 2000 4000 8000 16000

Background Noise No. 5

Measuring Point No. 1

Measuring Point No. 3

Model YMPC-F 8 EX

Wei

gh

ted

So

un

dP

ress

ure

[dB

(A)]

0

10

20

30

40

50

60

70

80

90

1

Frequency [Hz]31,5 63 125 250 500 1000 2000 4000 8000 16000

Background Noise No. 5

Measuring Point No. 1

Measuring Point No. 3

Model YMPC-F 10 EX

0

10

20

30

40

50

60

70

80

90

1

Frequency [Hz]31,5 63 125 250 500 1000 2000 4000 8000 16000

Background Noise No. 5

Measuring Point No. 1

Measuring Point No. 3

Wei

gh

ted

So

un

dP

ress

ure

[dB

(A)]

Model YMPC-F 4 EX

6.6 Structure-borne Noise

Since York Mini Absorption Chiller-Heaters do not havelarge rotary parts, the single amplitude at the base is amaximum of 2 µm thus vibration is negligible. However,If the unit is installed on a roof or indoors low-frequencysound may be transmitted via the building structure.Isolation pads are delivered, as standard, with the unit tobe located, by others, beneath the feet of the unit. If theunit is installed on a roof or in a room of a hotel and allvibration must be prevented from being transmitted toguest rooms, special isolation equipment must be used.For such applications the installation method should becarefully investigated by a specialist.

The vibration of this unit is very small.

6.7 Manual Changeover Summer / Winter

The unit is capable to operate two operating modesCooling (summer) and Heating (winter). To change themode of operation shut down the unit, then set thechangeover valve V1 to the opposite position and setthe cooling-heating changeover switch to the requiredmode. After the changes have been carried out the unitcan be set into operation again.

An electric changeover option is available, which allowsthe changeover without manually sett ing thechangeover valve. This option consists of an electricactuator on the changeover valve, a time delay and aselection switch fitted on the unit control panel. Thechangeover switch is accessed via the sliding doors onthe unit casing.

Electric changeover between modes is delayed by 30minutes to avoid malfunction.

The cooling tower lining and the cooling waterpiping needs to be able to withstand watertemperatures of 80°C, when modechangeover is used.

(10/03)

6-6 156-EG-100 Rev. 1

6.8 Basic Electrical Connections

(10/03)

156-EG-100 Rev. 1 6-7

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10

10

11

11

12

12

13

13

14

14

15

15

16

16

17

17

18

18

19

19

20

20

21

21

22

22

23

23

24

24

25

25

26

26

27

27

28

28

X..

T8

L1

L1

L2

L2

L3

L3

PE

PE T4TB1 1

RES.

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10

10 11 12

11

13

17

14 15

or

16 17

11

18

ON OFF

12

19

17

20 T2TB1

X.. 1

1

2

2

3

3

4

4

5

5

6

6 7 8

*

Failu

re2

-In

terr

upt O

pera

tion

func

tion

ofth

eA

BS

Failu

re3

-In

terr

upt O

pera

tion

ofB

urne

r(u

sed

for

mal

func

tion

ofai

rsu

pply

etc.

)

Failu

re4

-In

terr

upt a

ll fu

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nsof

the

AB

S

Latc

hing

cont

act v

iavo

ltage

free

cont

act

Inte

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cool

ing

tow

er

N or V-230 Vac or V+

Scope ofsupplyYork

By others

T1 TB1

Vmax = 250 VacImax = 2 A

Contact loadVmax .= 250 VacImax. = 2 A

Ope

ratio

nsi

gnal

Ope

ratio

nsi

gnal

Failu

resi

gnal

Failu

resi

gnal

Bur

ner

onsi

gnal

Signals for remote display

Coo

ling/

heat

ing

-O

N w

ithco

olin

g

Dilu

tion

mod

esi

gnal

Rem

ote/

Loca

l sig

nal -

ON

with

rem

ote

N or V-230 Vac or V+

Failu

reco

olin

gw

ater

tem

pera

ture

-O

N w

ithto

ohi

gh

Chi

lled/

hot w

ater

pum

p

Coo

ling

wat

erpu

mp

Commands

Coo

ling

tow

erfa

n

Air

hand

ling

unit

(nor

mal

lyno

t use

d)

Pla

ntro

omfa

n(n

orm

ally

not u

sed)

Scope ofsupplyYork

By others

Mains400 Vac 3 + PE, 50 HzØ

Failu

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-In

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upt O

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tion

Fun

ctio

nof

the

AB

S

* * *

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ply

byot

hers

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use

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ion

byot

hers

20A

gl

Remote Control OptionsON/OFF by Others

Use screened single core cableMax. length 200 m, Min Ø 0.8 mm²

4-20 mA

Inte

rlock

chill

ed/h

otw

ater

pum

p

Inte

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cool

ing

wat

erpu

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Not

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d

LOCATION OF THE TERMINAL STRIPS ON THE CONTROL PANEL

* Fit Jumpers tounused Inputs

T8

T2 CN1 T2 CN2 T2 CN3 T2 CN4 T2 TB1 T1 TB1 T3 CN1

TB 1

T3 CN2

T7

T4

TB

1T

5

Current output inverter

Connection Diagram

7 OPERATION

The operation of each York Mini ParaFlow AbsorptionChiller-Heater is controlled automatically by themicrocomputer control panel of the unit.

7.1 Operating Control

7.1.1 Starting

If the start button is pressed, or a remote start signal isinput, the chilled / hot water pump is immediately startedby the start signal chilled / hot water pump. If thetemperature sensor in the chilled / hot water supplysenses an increase in temperature, the cooling waterpump, cooling tower fan, and the solution pump andrefrigerant pump of the absorption chiller-heater arestarted. In the case of heating mode selection thecooling water pump, cooling tower fan, and therefrigerant pump will not start.

At the same time, the burner fan is started and pre-purgeof the flame chamber is performed. After a pre-setperiod the burner is ignited. After ignition of the burner isconfirmed automatic operation is started.

7.1.2 Stopping

If the stop button is pressed, or a remote stop signal isinput, the fuel input and the burner are stopped. Thechilled / hot water pump, cooling water pump, coolingtower fan, and the solution pump and refrigerant pumpare kept operating for about 10 minutes, after which theywill turn off. During heating mode operation the coolingwater pump, cooling tower fan, and the refrigerant pumpare not in operation.

7.1.3 Cooling/Heating Capacity Control

The cooling/heating capacity is controlled by sensingthe chilled / hot water temperature at the outlet of theevaporator to control the firing rate of the burner. Thecontrol of the burner is shown below.

When the load is reduced to below the capacity controlrange, the burner is turned off to prevent the chilledwater temperature from lowering (and prevent the hotwater temperature from rising during heating modeoperation). When the chilled water temperature rises (orwhen the hot water temperature reduces in the heatingmode) to the set temperature, the burner startscombustion automatically.

7.1.4 Safety Shutdown

If the set-point of a safety device is exceeded, the alarmor safety shutdown may be signalled to an external BASby a voltage free contact. The cause of the safety actionis indicated on the microcomputer control panel, and thewater chiller-heater stops. If a remote controller(optional) is attached the alarm is indicated on it as well.

(10/03)

7-1 156-EG-100 Rev. 1

Model Gas fired Oil firedYMPC-F Proportionally 3-Position Control

3 EX to 10 EX 100 to 30 % 100-50-0 %

8 INSTALLATION

8.1 General

This manual contains recommendations concerning theuse of gas and oil fired absorption chiller-heaters forcommon applications. Additional information not foundin this document may be requested from YORK.

8.2 Location

(1) Each standard model YMPC-F/EX is designed forindoor or outdoor installation. The stated limitationsfor ambient temperature and minimum coolingwater temperature must be kept.

(2) YORK two stage absorption chillers modelYMPC-F/EX emit very little noise or vibration andmay be located at any level in a building where theconstruction will support the maximum systemweight.

(3) The location of the unit should provide sufficientclearance on every side for necessary access andmaintenance. Local regulations should beobserved.

(4) The space for maintenance should be secured byprotective fences.

The following space should be available for piping andmaintenance.

(5) Take appropriate measurements to preventaccidents by fire. Avoid wooden constructions nearto hot surfaces of the unit or the exhaust ducts.

Set the top of the exhaust gas chimney, of theYMPC-F/EX absorption chiller-heater, to a place wherethere is free air movement. If the exhaust gas stacks,oxygen becomes insufficient and there will be unstablecombustion. If the exhaust gas is discharged to thesuction side of the cooling tower the material of thecooling tower and the cooling water tubes may corrode.

(10/03)

156-EG-100 Rev. 1 8-1

A = Length of unit + 2200 mmB = Width of unit + 2000 mm

(6) Location close to buildings

To prevent back flow and stack of the exhaust gas andsecure normal combustion, the exhaust gas top shouldnot be installed in the wind pressure zones which arehatched in the following figure. Please observe thiscarefully.

(10/03)

8-2 156-EG-100 Rev. 1

(7) No combustible materials shall be located within1m of any part of the YMPC-F/EX unit and windowsthat open or ventilation openings, without a backflow preventive system, shall not be within 3m fromthe exhaust flue top.

(8) If the YMPC-F/EX flue is located horizontally lessthan 1m from a roof eave the exhaust flue topshould be raised by a minimum of 600mm.

(9) Install the stack at a distance from any airconditioning system air inlet that is sufficient toprevent exhaust gases from entering theequipment.

Do not match direction A in the following figureto the direction of the predominant wind insummer.

(10/03)

156-EG-100 Rev. 1 8-3

(10) Do not install the equipment near the stack of othercombustion equipment, ventilator, deodorisingpipe, etc. or in a dusty location.

(11) When installing the equipment indoors, install aproper gas duct, stack, air inlet, and ventilatingopening.

(12) Install the YMPC-F/EX model at the same level asthe cooling tower or lower to prevent air enteringthe cooling water piping, and be sure to install acheck valve on the discharge side of the pump.

Installation of a cooling water flow switch is mandatorywhen the unit is installed on the same level as thecooling tower. In addition, the cooling water pump needsto be arranged lower than the level in the cooling tower,to prevent air in the piping causing the pump to deliverzero flow.

(13) When installing YMPC-F/EX units outdoors, in aplace where heavy snow or volcanic ash may fall,install an independent roof above the unit to protectthe equipment from snow (volcanic ash).

In a place where snow or volcanic ash may fall it isrecommended that units are installed indoors. Whenoutdoor installation is the only option, the air inlet andexhaust pipe shall be protected from snow (volcanicash) with a simple roof, etc.

(10/03)

8-4 156-EG-100 Rev. 1

Install proper exhaust opening and ventilating opening so that fresh air

for combustion and health will be supplied sufficiently.

The arrangement should avoid the room pressure from becoming

negative.

(14) Install the equipment in a place with secureddelivery passage.

(15) When installing the equipment in a location havingsalty air, take care of the direction of the air inlets ofcooling towers and absorption chiller-heater units.If they are not in the proper directions, the tubesand internal devices of the unit may corrode.

(16) Install the equipment within the effective range of alightning rod.

(17) Observe the appropriate local regulations andstandards when installing the equipment.

8.3 Delivery, Rigging and Installation

The absorption chiller-heater unit and its cover aredelivered in one piece. Since the surface of the cover ispaint finished, take care not to scratch it. Prevent anyperson from standing on the top of the cover.

The unit is charged with absorbent and refrigerant undervacuum for shipping. If the vacuum in the parts of thisequipment is broken by an excessive load etc. ,duringdelivery, air will enter the circuit of the unit and causeextreme corrosion. Unit repair should be performed assoon as possible. It is time consuming and expensive.Therefore handle units with care.

8.3.1 Delivery

The unit is attached to two skids and covered bytranslucent foil and in enclosed in a container fortransportation. The unit is secured within the containerby wooden stoppers, which are nailed to the container.When unloading the equipment from the truck, check itscentre of gravity and ensure that the unit will not fall andthat no impact is given to the unit.

8.3.2 Removing the Packaging

After removing the translucent foil, the nails and thestoppers, the unit should be removed from the containerusing a forklift.

8.3.3 Lifting the YMPC-F/EX

The unit may also be moved by a crane and steel wireropes as shown below. The access covers must berefitted after rigging, to protect the internal parts of theunit.

(10/03)

156-EG-100 Rev. 1 8-5

Skids

Access Panel forWire ropes

Wire ropes

Front View

YMPC-F/EX

YMPC-F/EX

YMPC-F/EX

Translucent Foil

Container

Forklift Forks Skid

Skid

Container

Side View

YMPC-F/EX

Skid Stopper

Container

Container

Forklift

8.3.4 Installation of the YMPC-F/EX

(1) It is recommended to lift and move the absorptionchiller-heater unit using a fork lift or crane. If thismethod cannot be used, and it is necessary tomove or jack up the equipment on the floor,observe the precautions for moving or jacking upon the floor.

(2) When moving the absorption chiller-heater unit onthe floor, place a sufficiently rigid wooden frame,etc. under it, then use rollers. If the wooden frame isnot rigid and the number of rollers is insufficient,load will be concentrated partially on the equipmentand deform the legs.

(3) When moving the absorption chiller-heater unit onthe foundation, insert a smooth “lever” under thejack-up support. If a load is applied to a part otherthan the jack-up support, the base of theabsorption chiller-heater unit may be deformed.

(4) After delivery and installation at site remove thelifting devices and replace the access covers on itstop. Installation of the stack with supports shall beby others.

(5) When stor ing the del ivered absorpt ionchiller-heater unit for more than three months,before installation or when storing it outdoors inwinter, notify YORK immediately.

(10/03)

8-6 156-EG-100 Rev. 1

OverallDimensions

(mm)Model Width W Height H Length L Width W1 Height H1

3 EX 1450 1960 2340 1850 24604 EX 1450 1960 2340 1850 24605 EX 1450 1960 2340 1850 24606 EX 1530 2030 2580 1930 25307 EX 1550 2030 2870 1950 25308 EX 1550 2030 2870 1950 2530

10 EX 1680 2030 2970 2080 2530

Width of deliveryRecommended Min.

opening (mm)

8.3.5 Levelling of the Absorption Chiller/Heater

The foundation should be levelled with a maximummisalignment of 1 mm per 1000 mm distance, to ensurecorrect unit operation. The levelling of the unit should bechecked and logged directly after rigging the unit, withthe rigging devices fitted. The vertical alignment of theunit should be checked as shown below.

(10/03)

156-EG-100 Rev. 1 8-7

9 WATER CIRCUITS – GENERAL RECOMMENDATIONS

Piping procedure for chilled water, hot water, andcooling water.

9.1 Scope of Delivery

The scope of delivery of the YORK absorptionchiller-heater is indicated with [ ] on the piping diagram.Piping, fittings and devices outside this scope of supplyshall be delivered and installed by others.

9.2 Flow Rate

Flow of chilled and cooling water is limited by velocityconsiderations. The chiller is designed for a constantflow rate. Applications where the chilled and coolingwater flow varies by more than ± 10% from designrequire special consideration. Such applications shouldbe agreed with YORK.

9.3 Chilled Water Temperatures

For normal chiller applications, the chilled water leavingtemperature may be selected between 7 and 12°C.

9.4 Water Quality

Assessment and preparation of the chilled and coolingwater should take into account the materials used for theheat exchangers. Normally the efficiency of the unit canbe maintained through preparation of the water andperiodic cleaning of the water side of the heatexchangers. Conditions requiring too frequent cleaningof the unit may make it worthwhile to provide a largerallowance for fouling and/or to use other materials. Seealso Section 6.4.

9.5 General

The following general recommendations for theapplication of absorption chillers are in line withaccepted modern practice. Male thread connections areprovided to allow tubes to be easily dismantled.

The chilled water and cooling water pumps must bedesigned according to the unit data. Regulating valvesshould be provided on the discharge of the pumps foradjusting the exact water flow. It is desirable to useflexible connectors on the suction and pressure side ofthe pump. The chilled water and cooling water pumpsshould be arranged in such a way that the liquid is forcedthrough the heat exchangers. This causes excesspressure in all fluid chambers of the absorption chillerwhich ensures fluid flow through all tubes in the unit.

YMPC-F/EX absorption chiller-heaters are designed forDWP 780 kPa on the chilled water and 590 kPa on thecooling water side. For applications where the staticpressure in one or both of the liquid circuits is very high,the circulating pump can also be located at the exit of thechiller. This means that the heat exchangers are onlysubjected to the static pressure of the system and not,as is usual, to static and dynamic pressure.

All adjoining piping must be supported so that no forcesare transferred to the unit. All pipe connections to theunit must be equipped with stop valves to allow normalservicing and maintenance.

The pipework to the unit must be set up in such a waythat the heat exchangers (evaporator, absorber andcondenser) cannot drain when the unit is not operating.This prevents air entering the system during stops. Air inthe system would accelerate corrosion and pipe fouling,which would impair system safety and/or give purgingproblems.

Manometers with a manometer cock must be installedon site in the chilled water piping and cooling waterpiping. The manometers must be chosen for theoperating pressure of the unit, graduated according tothe operating conditions.

Dial Thermometers or industrial Thermometers arevaluable additions. They must be built into the chilledwater and cooling water pipework to ensure quickdetermination of water temperature which gives ageneral indication of the condition of the system. Formore precise determination of the chilled watertemperature thermometer wells should be inserted inthe pipes. Mercury precision thermometers with 0.1°Cgradations can be placed in the wells. The water boxesof the unit are equipped with plugged drain and ventconnections. If required, drain and vent cocks may bescrewed into these nozzles to facilitate servicing andmaintenance.

It is imperative for safe operation of absorption chillersthat the surfaces of the heat exchangers are clean. Werecommended that the fluids used as chilled/hot waterand cooling water are periodically checked. Anyresulting necessary corrective measures must be takento avoid undesirable fouling and/or corrosion of the heatexchanger surfaces.

(10/03)

9-1 156-EG-100 Rev. 1

9.6 Chilled/Hot Water Circuit

The chilled/hot water piping system should be designedfor constant flow through the evaporator of theabsorption chiller-heater, which reduces the possibilityof tube fouling by low flow velocity. Also the possibility ofunstable operation of the water temperature control isreduced, which could occur when chilled/hot watertemperature and quantity change at the same time.

To maintain the required constant flow the consumer(load) may be equipped with three-way bypass valvesor two-way throttle valves with automatically adjustedbypass employed between chilled water inlet and outlet.Chilled/hot water connections should be designedaccording to the drawings for the relevant unit.

A flow switch (difference pressure design) is installedwithin the unit as a standard, it is factory wired to thecontrol panel.

A water strainer of approximately 3 mm mesh should befield installed in the evaporator inlet. If the chilled waterpump is installed close enough to the chiller it may beprotected by the same strainer. The flow switch andstrainer ensure water flow during unit operation. Areduction or loss of flow could seriously impair theperformance of the unit or even result in tube freeze-up.

Vent valves must be located at all high points in thesystem to remove air that has built up. Suitable devicesmust be provided in the chilled water system for liquidexpansion and necessary liquid top-up.

Many applications require the use of chilled water with asmall amount of antifreeze e.g. ethylene glycol, toprevent freezing of non drained chilled water heatexchangers, especially those in an external air stream.Such applications should be discussed with YORK.

9.7 Calculation of the Chilled Water BufferVolume

A large volume of chilled water in the unit supportsstable temperature control. lt can be increased tocounteract the effects of sudden load variations. Thisbuffer volume must be located in the return piping on theentry side of the unit and should be about 250 to 335litres for each m³ of circulating chilled water.

The storage volume of the circuit is not a requirement ofthe manufacturer of the unit, but of the installation tokeep the chilled water supply temperature constant.

The behaviour of absorption chillers differs from that of amechanic chiller:

(1) Whilst mechanical chillers deliver maximumcapacity immediately after start-up, it takes from 5to 10 minutes for the absorption chiller to reach anyreal chilling capacity, depending on it’s currentcondition.

(2) At shutdown the absorption chiller continues todeliver residual capacity for a further 5 to 10minutes and may equate to full chilling capacitydepending on it’s shutdown level. Shutdown at fullcapacity should therefore be avoided (may becaused by a field control in a multi-unit installation).

These facts must be taken into account by thedesign engineer when assessing the chilled waternetwork and must always allow an increase inchilled water entering temperature on start-up.

(3) Calculation of system volume when storedbetween a maximum permit ted enter ingtemperature on restart and the shutdowntemperature by the control of the absorption chiller.

Example:

The chilled water system must have approx. 1.1 m³content, to achieve storage for 15 minutes with the givenconditions.

(10/03)

156-EG-100 Rev. 1 9-2

Design cooling load 100 kWMinimum load 30%Buffer recall time 15 minutesPermitted increase ofsupply temperature in 6 °Centering temperature

Required storage volume = 100 x 30 x 0.86 x 15 = 1.1 m³6 x 60 x 100

The YORK service engineer sets the programmableshutdown point approx. 1°C below the set-point of thecontrol.

Therefore:

A sharp rise in the chilled water entering temperatureshould be deliberately permitted when restarting atfrequently low capacity operation so that a realisticstorage volume can be set.

To put it another way, chilled water systems with a smallvolume have a wide variation of the chilled water supplytemperature in intermittent operation of the absorptionchiller. This variation cannot be reduced by alteringthe internal control of the unit.

As the working point of minimum capacity cannot bereduced YORK recommends that several smaller unitsare used e.g. in the ratio 1:2.

9.8 Cooling Water Circuit

The cooling water connections should be designedaccording to the drawings for the relevant unit. Thecooling water piping must be connected as shown in thedocumentation. Otherwise improper function is theresult.

A contact of the cooling water pump contactor should belinked to the control of the unit so that the unit cannotfunction if the pump is not operating. We stronglyrecommend that the optional cooling water flow switch isordered, or a flow switch (field install) is built into thecooling water circuit to allow operation of the unit onlywhen cooling water is flowing.

The control logic of the unit contains a feature to controlthe operation of the cooling tower fan. The cooling towerfan will cycle 'ON' at 31°C and 'OFF' at 29°C coolingwater temperature. The auxiliary contacts of the coolingtower fan contactor also need to be interlocked toensure proper operation.

YORK direct fired two stage Mini ParaFlow absorptionchiller-heaters model YMPC-F/EX can operate withouta cooling water bypass down to a cooling water inlettemperature of 15°C. YMPC-F/EX chiller-heaters areadjusted to suit these conditions by various internalcontrol devices which adjust the concentration of thesolution and maintain the chilling supply to the airconditioning system. Constant cooling water flowsupports the precise control of chilled water leavingtemperature.

Lower cooling water temperatures than 15°C should beprevented by cycling the cooling tower fans and/or abypass valve in the cooling water supply.

9.9 Water Piping

Do not apply pressure higher than 780 kPa (8 bar g) tothe evaporator of the chiller-heater unit. The maximumpressure of the cooling water heat exchangers is490 kPa (5 bar g).

Do not adjust the water flow through the heatexchangers by adjusting valves ahead of the water inlet.ONLY USE ADJUSTMENT VALVES AT THE OUTLETOF THE HEAT EXCHANGERS. The use of inlet valvesmay cause turbulence, which could erode the tubes andthe tube sheet.

Install a drain valve at the lowest part of the pipingbetween the stop valve and absorption chiller-heaterunit. Then, fit a pipe between the drain valve and aproper drain ditch.

Install a valve for washing and chemical cleaning of thecoil to the water piping between the absorptionchiller-heater unit and the manual valve just before it,and another valve between the absorption chiller-heaterunit and the manual valve just after it. Size of the valvesfor washing and chemical cleaning 1”.

In case the city water is constantly lower in temperaturethan 15°C, and it is intended to use it for purgeoperation, connect the purge connection to the citywater piping.

Install a vent valve at a position higher than theabsorption chiller-heater unit.

Support the water piping independently so that itsweight will not be applied to the absorption chiller-heaterunit.

Install the thermometers, pressure gauges, etc. asshown in the drawing.

Install a strainer of about 3 mm mesh directly ahead ofthe heat exchanger inlet. If there is foreign matter in thechilled water system, it will accumulate in the tubes ofthe heat exchangers and cause freezing of the chilledwater and damage to the tubes. If the cooling watersystem is clogged, the operating pressure will rise andthe tubes will be clogged. Therefore be sure to install astrainer.

Secure the water source for washing the tubes.

Take care that the cooling tower will not draw theexhaust gas from the stack of this unit or othercombustion equipment. If exhaust gas is drawn, thecooling water will be contaminated and the tubes willcorrode.

(10/03)

9-3 156-EG-100 Rev. 1

Let the purge water flow out through the dischargeopening and rubber hose to a drain ditch (See“Automatic Purge System”).

If the chilled/hot water and cooling water is in a locationwhere freezing occurs, take respective measures toprevent freezing.

Make a plan to control the quality of the cooling watersufficiently.

Install the chilled/hot water pump and cooling waterpump on the inlet side of the absorption chiller-heaterunit, and be sure to apply the push-in method (to preventair from remaining).

Position of Valves for Cooling/Heating Operation

(10/03)

156-EG-100 Rev. 1 9-4

Piping for Chilled/Hot Water and Cooling Water

➀ ➁ ➂ ➃Cooling Open Open Open OpenHeating Open Open Closed Closed

9.10 Cooling Water Temperature Control andInterlock with Auxiliary Equipment

9.10.1 Cooling Water Temperature Control

The control logic of the unit contains a feature to controlthe operation of the cooling tower fan. The cooling towerfan will cycle 'ON' at 31°C and 'OFF' at 29°C coolingwater temperature. The auxiliary contacts of the coolingtower fan contactor also need to be interlocked toensure proper operation.

The cooling water temperature may be lowered to 15°C.It is not necessary to control the temperature of thecooling water as long as it is in the range between thespecification temperature and 15°C.

As a characteristic of the absorption chiller-heater unit,more energy is saved and an increase in capacityresults from low cooling water temperature.

If the cooling water temperature falls to 15°C, for morethan 15 minutes, raise the cooling water temperature bystarting and stopping the cooling tower fan or using athree-way valve.

9.11 Interlocked Operation of Chilled/Hot WaterPump, Cooling Water Pump and CoolingTower Fan

The chilled/hot water pump, the cooling water pump andthe cooling tower fan must be interlocked for secure andsafe operation. Transfer the contact signals for thispurpose as shown below.

9.12 Expansion Tank

If the chilled/hot water piping system is not of the opentype, an expansion tank needs to be installed.

The design of the expansion system should ensure thatthe water level in it will be 1 – 2 m higher than the highestpart of the chilled/hot water piping system.

Do not install any valve to the expansion pipe.

When using an enclosed expansion tank applysufficient constant pressure to ensure that a negativepressure is not applied to the circuit even whenoperation stops.

In addition, be sure to install water feed piping havingsufficient pressure to supply water for the piping system.Set the supply pressure so that a pressure higher than780 kPa (8 bar g) cannot be applied to the absorptionchiller-heater unit.

Specifications of enclosed expansion tanks are shownbelow for reference.

Example for manufacturer of expansion tanks:

Otto Heat Heizungs-, Energie- und AnlagentechnikGmbH & Co KGPostbox 110157473 Wenden-GerlingenPhone: +49-2762-9302-0Fax: +49-2762-9302-400 or +49-2762-9302-500

Product name: Enclosed diaphragm expansion tankSpecifications: See the following table.

1. A tank for air conditioning cannot be usedfor hot water supply.

2. The standard charge pressure must not beadjusted to the maximum working pressure ofthe tank.

(10/03)

9-5 156-EG-100 Rev. 1

Cooling Water Pump Cooling Tower

Chilled/Hot Water Pump

Interlocked OperationSignal

Do Not Operate In Heating Mode

Interlocked OperationSignal

Interlock

Interlock

Abs

orpt

ion

Chi

ller/

Hea

ter

Uni

t

InterlockedOperation

Signal

This company is also able to deliver encloseddiaphragm expansion tanks including automatic watercharging device. Automatic water charging is required ifchilled water is used for driving the automatic purgesystem.

(10/03)

156-EG-100 Rev. 1 9-6

Model Design Maximum Maximum Tank Weight Connection Maximum Maximum

(see Receiving Working Dimensions Size Static Temperature

below) Capacity Pressure (Ø x H) Pressure °C

litres barg mm (kg) inches bar °C

01002 A 8 3.0 270 x 185 4.1 ¾” 1.5 12001003 A 12 3.0 270 x 255 4.7 ¾” 1.5 12001004 A 18 3.0 270 x 365 7.2 ¾” 1.5 12001005 A 25 3.0 380 x 280 9.2 ¾” 1.5 12001006 B 35 3.0 380 x 365 11.3 ¾” 1.5 12001007 B 50 3.0 380 x 505 14.3 ¾” 1.5 12001008 B 80 3.0 480 x 505 20.6 1” 1.5 12001009 C 110 3.0 480 x 665 25.5 1” 1.5 12001010 C 140 3.0 480 x 885 37.6 1” 1.5 12001011 C 180 3.0 480 x 1105 44.0 1” 1.5 12001012 C 200 3.0 480 x 1215 46.9 1” 1.5 12001013 C 220 3.0 480 x 1325 51.0 1” 1.5 12001014 C 280 3.0 480 x 1655 59.5 1” 1.5 12001015 C 320 3.0 480 x 1875 64.1 1” 1.5 12001022 C 350 2.5 550 x 1570 67.0 1” 1.5 12001023 C 400 2.5 750 x 1040 70.0 1” 1.5 120

10 AUTOMATIC PURGE SYSTEM

The Automatic Purge Unit needs waterwith constant temperature equal or below15°C as driving force. This may be chilledwater (automatic charging device in thechilled water system is mandatory) or citywater of guaranteed temperature.

10.1 Purge Operation

(1) This equipment contains an automatic purgedriven with chilled water. City water of constanttemperature < 15°C or chilled water can be used. Ifchilled water is used for driving the purge thedesign of the feed part of the chilled water systemmust be taken into consideration so that chilledwater will be discharged periodically.

(2) The discharge rate of each purge cycle is 5 - 6litres/min x about 5 min/cycle = about 25 - 30 litresper cycle.

(3) The city water or the chilled water is dischargedabout once a week during the cooling operation. Itis not discharged during the heating operation.

10.2 Purge Drain System

(1) To discharge the city water or the chilled water forthis purpose, a vinyl hose (15 mm in nominaldiameter and about 500 mm long out of theequipment) is attached to the rear of the absorptionchiller-heater unit.

(2) Locate a drain point close to the absorptionchiller-heater unit for draining the dischargedchilled water through the above vinyl hose. (Fig. 1)

(3) If no drain point can be provided close to theabsorption chiller-heater unit, locate a water tankbelow the vinyl hose end to receive the dischargedcity or chilled water, then lead the water to a properdrain point. Do not connect drain piping to the vinylhose directly. If such a connection is fitted thepurging performance will be lowered and thechilled water may flow back into the unit and causeproblems, depending on the piping method. (Fig.2).

(4) Keep the pressure of the purge system of chilledwater above 1bar g at the inlet of the absorptionchiller-heater unit.

(5) Supply make-up water to offset the amount ofwater as described in items 1 and 2 of 10.1. In thecase of discharged chilled water make-up watermust also be supplied to the chilled waterexpansion tank.

(10/03)

10-1 156-EG-100 Rev. 1

Fig. 1 Fig. 2

11 FUEL PIPING

11.1 Gas

11.1.1 Precautions for installation

(1) Before piping, flush the unit to remove any foreignmatter.

(2) The gas piping system should be installed andchecked by an authorised specialist. Use sealantspecified by the gas manufacturer. Take care thatthe sealant will not flow in the piping, and check forleaks very carefully.

(3) The maximum allowable pressure of the devicesattached to this unit is 300 mbar. Do not apply apressure higher than the allowable pressure whenfitting and flushing the piping and checking forleaks.

(4) Check that the type and feed pressure of the gasconforms to the specifications.

(5) Be sure to install a manual shut-off valve for eachdevice.

(6) Check that the gas is sufficiently dry. Muchmoisture in the gas can cause freezing andmalfunction of the shut-off valve, etc., and maytherefore cause a serious accident.

(7) Although a strainer is installed in the unit, clean theinside of the piping before fitting it.

(8) Precautions for selecting external strainer.

The strainer in the unit is used to remove fineparticles. Therefore install an external strainer(about 1 mm mesh) to remove larger particles.Check that its resistance is below the allowablepressure loss.

The pressure loss ∆p is 5mmAq.

Referring to the specific gravity of the gas (in thefollowing table) select an appropriate strainer.

(9) Observe national and local laws, codes andregulations and the regulations of the gascompany.

(10/03)

156-EG-100 Rev. 1 11-1

1 Ball valve2 Gas filter3 Pressure regulating unit4 Gas pressure switch5 Double solenoid valve6 Gas volume regulator7 Valve proving (optional)

Natural Gas City Gas Air PropaneSpecific Gravity 0.64 0.54 1 1.6

11.2 Fuel Oil

11.2.1 Precautions for Installation

(1) The oil burners can be used with 1-pipe systems(only the oil suction pipe is connected) or with2-pipe systems (oil suction and return pipe areconnected).

(2) The oil piping system should be installed andchecked by an authorised specialist. Design the oilpiping so that the oil pressure will be 0.05 – 2 bar gat the connecting point. If the oil pressure is toohigh, oil may leak. If the oil pressure becomesnegative, air will be separated from the oil and thepump will be dried, then combustion may becomeunstable and the burner may malfunction.

(3) When designing the piping, consider theresistance of the suction piping, including thedifference between the lowest oil level in the tankand the suction opening of the pump, overall lengthof the suction piping, valves, strainer, bends, etc.

(4) Reduce the number of piping joints as much aspossible.

(5) If the ambient temperature is extremely low inwinter, the oil feed pipe must be insulated orheated.

(6) Be sure to install manual isolating valves formaintenance.

(7) Install an oil level control device (float switch, etc.)and an oil level alarm (level switch, etc.) to the oilservice tank to prevent oil leakage and breakage ofthe oil pump.

(8) When measuring the capacity of combustion,install a flow meter.

(9) Thoroughly flush the connected piping.

(10) During start-up ensure that air is bled from the oilpump.

(11) Observe national and local laws, codes andregulations.

(10/03)

11-2 156-EG-100 Rev. 1

1 Pump with solenoid valves fitted2 Nozzle head with quick acting shut off valve

11.2.2 Precautions for Use of a Water Chiller/Heater Unitwith Fuel Oil

It is recommended that town gas or natural gas is usedas the fuel for the absorption chiller-heater unit. If it isdifficult to use gas or fuel oil is cheaper than gas fuel oilmay be used.

Note that the following problems may occur when fuel oilis used.

(1) Sulphur and ash, contained in the fuel oil, stick tothe inside wall of the flame chamber and to the heatexchanger tubes and will therefore lower the heattransfer efficiency or prevent flow of thecombustion gas.

(2) Sulphur contained in fuel oil may bond withmoisture in the combustion gas to cause sulphurcorrosion.

(3) Soot produced by incomplete combustion of fuel oilsticks to the inside wall of the flame chamber andheat exchanger tubes. This will lower the heattransfer efficiency.

To prevent these problems the following three methodsare effective and necessary.

� Use fuel with a sulphur content as low as possible.

For this purpose, it is recommended that fuel oilwith a very low sulphur content is used. Thecorrosive factors increase remarkably if thesulphur content exceeds 0.5 %. Fuel containingless sulphur should be used to increase the lifecycle of the equipment.

� Maintain a good combustion condition.

If the combustion condition becomes bad, sootsticks faster and creates a worse combustioncondition. Therefore, the combustion conditionshould be checked periodically and adjusted whennecessary. For this purpose a specif iedmaintenance contract should be arranged.

� Remove sulphur, ash, and soot periodically.

As the absorption chiller-heater unit is operatedlong hours, sulphur, ash, and a little soot will stickwithout exception. Therefore, the soot needs to beremoved periodically (at least once a year).

This work should be included in the maintenancecontract.

If fuel oil is used the inside of the flame chamber andexhaust duct usually need to be cleaned once eachyear. The sulphur and ash should be cleaned usingchemicals. Fuel suppliers have access to a methodwhich removes them by combustion.

This is achieved by applying a special liquid to theheating pipes with a special jig. If combustion starts,after the liquid is applied, the foreign matter is burnt andremoved. The resulting ash is to be removed by avacuum cleaner. Since the time to clean the unit is short,it is recommended that it is cleaned frequently.

Contact your local fuel supplier for delivery of thenecessary chemicals and cleaning technique.

11.2.3 Fuel Tank

If oil is heated, its vapour may catch fire, thus it isregarded as a dangerous. Installation and control of afuel tank are strictly regulated by “Fire PreventionRules”, etc. Observe them. Take extreme care instorage of the fuel.

(1) Prevention of running out of fuel

Interruption of combustion by lack of fuel for a prolongedperiod may cause problems in the absorptionchiller-heater unit. Be sure to take measures to preventfuel starvation (a warning light, audible alarm, etc.)

(10/03)

156-EG-100 Rev. 1 11-3

(2) Installation standard of fuel tank

Install the fuel tank at least 2m away from the absorptionchiller-heater unit in a horizontal direction.

Install the fuel tank on a floor made of incombustiblematerial.

When installing the fuel tank on a stand, make the standof incombustible material.

Install a lockable water drain valve and strainer to thefuel tank.

Do not install the oil tank fuel filler in a location where fireis used. Install in a location where fuel vapour generatedduring filling will rapidly dissipate.

Install a vent pipe to the fuel tank, to atmosphere and fit acopper wire net cap to its end to prevent the fuel vapourfrom igniting.

Observe national and local laws, codes and regulations.

11.3 Connecting the Exhaust Gas to the ExhaustDuct of the Building

11.3.1 Precautions for Installation

When installing the water chiller-heaterunit inside a machine room, check the fireprevention measures, design of theexhaust gas duct and stack, design of theventilation openings, etc.

Contact the authority responsible for theinstallation and operation of firing devices.

Install the absorption chiller-heater according tonational and local fire prevention rules and codes fordesign, installation and operation of firing devices.

Design the exhaust gas duct with a proper sectionalarea. Do not install sharp bends or change the directionor cross sectional area suddenly as this will generatevortexes and negative pressures. Install smooth radiusbends to reduce the gas flow resistance as much aspossible.

Reduce the number and length of horizontal sectionsand bends of the exhaust gas duct as much as possible.When horizontal section is necessary do not connect itdirectly to the absorption chiller-heater unit, but connecta vertical section to the unit first, then connect thehorizontal to the vertical. (If the horizontal section of thegas duct is long, combustion becomes unstable andmay oscillate).

Determine the diameter and shape of the exhaust gasduct and height of the stack so that the static pressurewill be 0 to - 5 mm Aq at the outlet of the absorptionchiller-heater unit. If the static pressure at theconnecting point becomes positive, the smoke willdischarge into the plant room. Do not increase the draftto more than 5 mm Aq above the exhaust resistance.Design the exhaust gas duct according to the nationaland local laws, codes and regulations.

If the static pressure is not 0 to –5 mm Aq atthe exhaust gas outlet of the absorptionchiller-heater unit, combustion may becomeunstable. Therefore, adjust the static pressurewith a draft regulator, fixed damper foradjustment of draft, etc.

Use heat-resistant or flame-resistant materials(incombustible materials such as concrete, mortar,plaster, etc.) for the areas of walls, ceilings, etc. throughwhich the gas duct or stack will be installed.

It is recommended that the exhaust gas duct is thermallyinsulated to prevent temperature rise in the machineroom and the possibility of fire etc. (The exhaust gastemperature may rise to 300 °C).

Install sufficient numbers of supports for the gas ductand stack to allow for thermal expansion.

Locate the opening of the stack at least 1 metre from thebuilding or at least 3m from each opening of the building(window, door, ventilation opening, etc.).

If a building is within 1m of the end of the stack, in ahorizontal direction, set the stack at least 0.6 metrehigher than the eaves of that building.

Design the opening of the stack so that rain, snow, etc.will not enter it and the draft will not be affected by wind,etc.

Locate the opening of the stack sufficiently from thecooling tower and from each air conditioning system airinlet to prevent the exhaust gas from entering thecooling tower and the occupied building.

It is recommended that a separate exhaust gas duct isinstalled for each absorption chiller-heater unit. Use of acommon exhaust gas duct for multiple units of differentcombustion types may cause problems.

(10/03)

11-4 156-EG-100 Rev. 1

11.3.2 Precautions for use of a Common Stack forAbsorption Chiller/Heater Unit and EmergencyPower Generating Unit

The exhaust gas from a generator normally has apositive pressure.

If the exhaust gas from an emergency power generatingunit is linked to the exhaust duct from the absorptionchiller-heater unit, observe the following rules:

(1) The allowable back pressure of the absorptionchiller-heater unit is – 5 mm Aq to 0 mm Aq.Therefore, when the absorption chiller-heater unitand the generator operate simultaneously (evenwhen the generator is operating for a periodicaltest), the pressure at the joint of the exhaust gasesmust be negative. If this is not the case, thefollowing may occur:

When the draft is not stable, just after theabsorption chiller-heater unit is started, theexhaust gas may flow back into the absorptionchiller-heater unit. If this occurs, combustionbecomes unstable and the exhaust gas maydischarge to the machine room, etc.

The exhaust gas from the absorption chiller-heaterunit may be blocked at the joint and raw gas mayflow out because of combustion problems. This is adangerous situation.

(2) Since the back pressure of the emergency powergenerating unit is very high, the pressure at the jointwill most probably be positive and raw gas flow islikely to occur. Therefore, satisfy the condition in a)above. Since it is difficult to set the back pressure ofthe emergency power generating unit to near 0 mmAq it is recommended that independent stacks areinstalled.

(3) If it is necessary to use a common stack for theabsorption chiller-heater unit and the emergencypower generating unit (including the periodical testoperation), be sure to install an interlock thatprevents the absorption chiller-heater unitoperating whenever the generator is started. Inaddition, install dampers to the gas duct and limitswitches so that the dampers will be fully closedwhen the generator is operating and will be fullyopened when the absorption chiller-heater unit isoperating. This will prevent the exhaust gas fromflowing back to and through the absorptionchiller-heater unit.

Install ribs, supports, etc. to the gas duct to preventvibration. In addition, support the gas duct so that itsweight will not be applied to the absorption chiller-heaterunit.

Install cleaning holes with covers on the exhaust gasduct, and a drain valve on each horizontal part of it, sothat the stack can be cleaned thoroughly.

Install a lightning conductor or a grounding wire to thestack, if necessary.

Manufacture the exhaust gas duct and stack from sheetmetal of stainless steel, galvanised steel or rolled steeland a general structure that they will have sufficientstrength.

When any law concerning to construction is applicable,refer to it before designing and installing the gas ductand stack.

Install a draft pressure measuring opening 12 mm dia. toeach horizontal part of the gas duct.

Install drain valves on the gas duct and stack.

If a plant room is ventilated with a blower, the pressure inthe room may become negative or positive, and normalcombustion cannot be achieved. To prevent this, set aninterlock in the starting circuit of the absorptionchiller-heater unit. (External interlock terminals areinstalled to the absorption chiller-heater unit.)

(10/03)

156-EG-100 Rev. 1 11-5

12 CHECK LIST FOR INSTALLATION

For long, safe, and economical use of the absorption chiller-heater unit and air conditioning equipment, werecommend that the safety and maintenance items indicated below are followed. They should be checked duringthe design and installation periods.

Section No. Item Checked Remarks

Gas 1 Is a strainer installed ? YES ❏ / NO ❑

2 Do the type and pressure of the gasconform to the unit specification ?

YES ❏ / NO ❑

3 Was piping flushed sufficiently ? YES ❏ / NO ❑

Oil 1 Is oil pressure at joint between oil pipingand burner piping positive ?

YES ❏ / NO ❑ 0.05 bar g to 2 bar g

2 Was piping flushed sufficiently ? YES ❏ / NO ❑

ChilledWater/CoolingWater

1 Is a strainer installed in the inlet of theabsorption chiller-heater ?

YES ❏ / NO ❑ Install strainer with 3 mmmesh

2 Are drain and vent valves installed ? YES ❏ / NO ❑

3 Are pressure gauges and thermometersinstalled ?

YES ❏ / NO ❑

4 Is a cooling water bleed valve installed ? YES ❏ / NO ❑

5 Are studs (1”) for washing/chemicalcleaning installed ?

YES ❏ / NO ❑ Install one at each inlet andoutlet of chilled/hot water andcooling water

6 Is freeze protection installed ? YES ❏ / NO ❑

7 Is there a drain point or equivalentavailable for bleeding the purge water ?

YES ❏ / NO ❑

8 Is a check valve installed in eachchilled/hot water outlet of each unit incase of multiple unit installation ?

YES ❏ / NO ❑

9 Is the chilled/hot water piping supportedsufficiently so that the weight of thepiping is not applied to the absorptionchiller-heater unit ?

YES ❏ / NO ❑

Exhaust GasDuct

1 Has the back pressure at the joint of theexhaust gas duct of the chiller-heaterbeen examined ?

YES ❏ / NO ❑ Back pressure 0 to –5 mm Aq

2 Are inspection points for exhaust gasanalysis and measurement of backpressure installed ?

YES ❏ / NO ❑ 1 or 2 holes 12 mm diameterwith cover

Wiring 1 Is the size of the supply fuse installedand checked according to the wiringdiagram ?

YES ❏ / NO ❑

2 Is the absorption chiller-heater connectedto earth ?

YES ❏ / NO ❑

3 Are the interlocks between absorptionchiller-heater, chilled/hot water pump,cooling water pump installed ?

YES ❏ / NO ❑

4 Is the interlock to the chilled/hot waterpump and cooling water pump checked ?

YES ❏ / NO ❑

(10/03)

12-1 156-EG-100 Rev. 1

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YORK InternationalZ.I. du Vern29230 LandivisiauFranceTel: ++33 2.98.68.21.52Fax: ++33 2.98.68.90.91

YORK International4 rue du Grand Fief85150 VaireFranceTel: ++33 2.51.33.70.83Fax: ++33 2.51.33.70.85

YORK International6 Bis rue Chalutier-La-Tanche56100 LorientFranceTel: ++33 3.20.87.61.62Fax: ++33 2.97.83.83.80

YORK InternationalRue de la LongueraisZA des Landelles35520 MelesseFranceTel: ++33 2.99.66.01.87Fax: ++33 2.99.66.92.73

YORK International78 Avenue de Laon02200 SoissonsFranceTel: ++33 3.23.59.65.55Fax: ++33 3.23.59.65.56

YORK International8 rue de l'Artisanat67120 DupigheimFranceTel: ++33 3.88.48.22.50Fax: ++33 3.88.48.22.51

YORK InternationalZ.A. du Prieuré37530 Poce Sur CisseFranceTel: ++33 2.47.23.29.23Fax: ++33 2.47.23.25.50

YORK InternationalAvenue LavoisierZ.I. de Villemilan91320 WissousFranceTel: ++33 1.60.11.88.76Fax: ++33 1.60.11.90.16

YORK InternationalParadiesstraße 21012526 BerlinGermanyTel: ++49/30/6797190Fax: ++49/30/67971944

YORK InternationalHafenstraße 10045356 EssenGermanyTel: ++49/201/364000Fax: ++49/201/3640041

YORK InternationalWächtersbacher Straße 8360386 FrankfurtGermanyTel: ++49/69/941402-0Fax: ++49/69/94140244

YORK InternationalSperberhorst 822459 HamburgGermanyTel: ++49/40/5714410Fax: ++49/40/57144133

YORK InternationalAlter Flughafen 18a30179 HannoverGermanyTel: ++49/511/678040Fax: ++49/511/6780433

YORK InternationalLeipziger Straße 35-3734125 KasselGermanyTel: ++49/561/507210Fax: ++49/561/5072122

Germany

YORK InternationalWiddersdorfer Straße 21550825 KölnGermanyTel: ++49/221/498750Fax: ++49/221/4987539

YORK InternationalFuggerstraße 104158 Leipzig - WiederitzschGermanyTel: ++49/341/566630Fax: ++49/341/5666333

YORK InternationalGottlieb-Daimler-Strasse 668165 MannheimGermanyTel: ++49/621/468-532Fax: ++49/621/468-680

YORK InternationalGeisenhausener Straße 681379 MünchenGermanyTel: ++49/89/78048Fax: ++49/89/7804844

YORK InternationalEdisonstraße 6090431 NürnbergGermanyTel: ++49/911/961750Fax: ++49/911/9617544

YORK InternationalMainzer Straße 2966111 SaarbrückenGermanyTel: ++49/681/67494Fax: ++49/681/66243

YORK InternationalFabrikstraße 1770794 FilderstadtGermanyTel: ++49/711/7709422Fax: ++49/711/7709433

YORK International62 , Kifisias Avezip code: 115 26Athens - GreeceTel: ++301- 69 11 888Fax:++301- 69 10 764

YORK MagyaroszagYORK International Kft.Váci út 206H-1138 BudapestHungaryTel: ++361/4657060Fax:++361/4657069

YORK ACR LtdUnit 2004/3City West Business CampusNaas RoadDublin 22IrelandTel: ++ 353 1466 0177Fax: ++ 353 1466 0198

York InternationalUnit 19Sarsfield RoadUniversity Hale Industrial EstateWiltonCorkIrelandTel: ++353 2 134 6580

Greece

Hungary

Ireland

Subject to change without notice. ALL RIGHTS RESERVED

Part No. 156-EG-100 Rev. 1 (10/03)YORK

EuropeYORK INTERNATIONALGardiners Lane South, Basildon, Essex SS14 3HE, England

GB