YORK VRF Air-Conditioner

YORK VRF Air-Conditioner

�� YDCC-03 IOM (English)(YGF)(0911)�Installation Manual

YORK VRF Air-Conditioner IOM

Contents 1 SAFETY CONSIDERATIONS ......................................................................................................

2 BEFORE INSTALLATION........................................................................................................................................... 2

3 SELECTING INSTALLATION SITE ............................................................................................................................... 2

4 BEFORE INSTALLATION........................................................................................................................................... 3

5 INDOOR UNIT INSTALLTION.................................................................................................................................... 4

6 REFRIGERANT PIPING WORK................................................................................................................................ .. 4

7 DRAIN PIPING WORK ............................................................................................................................................. 6

8 INSTALLING THE DUCT ........................................................................................................................................... 7

9 SET THE ESP........................................................................................................................................................... 7

10 ELECTRIC WIRING WORK...................................................................................................................................... 7

............................�... ��


1

1 SAFETY CONSIDERATIONS

Please read the “SAFETY CONSIDERATIONS” carefully before installing the air-conditioner equipment and be sure to install it correctly. The below notes include two types, both of which are related to safety and extremely important. Please read it carefully.

WARNING Indicates a potentially hazardous situation, which, if not avoided, could result in death or serious injury.

CAUTION Indicates a situation that may result in injury or equipment damage. According different condition, it also may result in the accidents of serious injury or other damage.

� Ask the specially trained personnel to carry out the installation work. Do not try to install the machine by yourself.

� Please perform the installation work in accordance with the steps in this manual. Improper installation may result in water leakage, electric shock or fire.

� Please install the air-conditioner on a foundation strong enough to withstand the weight of the unit. An insufficient strength foundation may result in the unit falling and causing injuries.

� Carry out the specified installation work after taking into account strong winds, typhoons or earthquakes.Improper installation work may result in the unit falling and causing injuries.

� Make sure that a separate power supply circuit is provided for this unit and that all electrical work is carried out by specially trained personnel according local laws, regulations and this installation manual. An insufficient power supply capacity or improper electrical construction may lead to electric shock or fire.

� Make sure that the specified wires are used and all wiring is secure. No external forces act on the terminal connections or wires. Improper wiring connections or installation may result in electric shock or fire.

� When connecting the wiring of power supply, wired controller and remote controller, the wiring should be laid orderly so that the electric parts box lid can be securely fastened.

� If it appears refrigerant leakage during the installation process, open the doors and windows immediately to ventilate the room thoroughly.

� Toxic gas may be produced if the refrigerant comes in contact with fire such as a fan heater, stove or cooking device.

� Power off the unit before touching the electrical parts.

� Do not touch the switch with wet fingers. Touching the switch with wet fingers may cause electric shock.

� Be sure the air-conditioner is well grounded. Never connect the ground line with the gas pipe, water pipe, lightning conductor or telephone lines. Incomplete ground line may cause electric shock or fire.

� Be sure to install a ground leakage breaker. Failure to install a ground leakage breaker may result in electric shock or fire.

� Please follow the instructions in this manual to install drain pipe in order to ensure smooth drainage and insulate the pipe to avoid accumulating of condensate water. Improper drain pipe may result in water leakage and property damage.

� Install the air-conditioner unit, power supply wiring and connection wires at least 1m away from electrical equipments, such as TVs, radios, etc. to avoid electromagnetic waves interference or noise.

� Remote controller transmitting distance may be shortened than the expected one in the rooms with electronic fluorescent lamps (inverter or rapid start types). Install the indoor unit as far away from fluorescent lamps as possible.

� Do not install the air-conditioner in the following locations: (a) Where a mineral oil mist or an oil spray or

vapor is produced, for example in a kitchen. Plastic parts may be deteriorated, corroded or damaged.

(b) Where corrosive gas, such as sulfurous acid gas is produced. Corroded copper tubes or soldered parts may result in refrigerant leakage.

(c) Where near machinery emitting electromagnetic waves. Electromagnetic waves may disturb the operation of the control system and result in a malfunction of the equipment.

(d) Where it may have flammable gas leakage, carboform or floating flammable dust, volatile flammable material such as gasoline or thinner. Using air-conditioner in those places may result in fire.

� Do not touch heat exchanger fins Improper touching the heat exchanger fins may result in machine damage or personnel injury.

� Be very careful about the product transportation.

WARNING


2

Do not use any packaging PP bands for a means of transportation to avoid PP bands rupturing and result in product damaging or personnel injury.

2 BEFORE INSTALLATION

� Do not unpack the unit before reaching the installation site. Where unpacking is unavoidable, countermeasure should be done after unpacking to avoid damaging or scratching of the unit.

� When moving the unit during or after unpacking, be sure to avoid putting any pressure or strength on the refrigerant piping, drain pipe or the other plastic parts, which may damage the unit.

� Before installing the unit, be sure to check the type of refrigerant to be used is R22 or R410A which should be same as outdoor unit.

� For the installation of the outdoor unit, please refer to the installation manual attached to the outdoor unit.

3 SELECTING INSTALLATION SITE

� If it has the possibility that the temperature and humidity inside the ceiling might exceed 30°C and RH80%, please reinforce the insulation on the unit. Use glass wool or polyethylene foam as insulation and its thickness is more than 10mm.

3.1 INSTALLATION SITE REQUIREMENTS

� The ceiling is strong enough to bear the indoor unit weight. If not, please reinforce the ceiling before installation.

� Ensure optimum air distribution and nothing blocks the air passage.

� Condensate water can be drained out smoothly. � No risk of flammable gas leakage. � Ensure sufficient clearance for maintenance and

service. (Refer to Fig. 1) � Piping between indoor and outdoor units is within

the allowable limit.

YDCC06-45/YDCC018-115 Indoor Units

Note: the distance between indoor unit top and roof should be more than 5 mm; the bottom of drain pan should be at least 5mm away from the ceiling.

YDCC50~60 /YDCC140~175 Indoor Units

Fig. 1 Clearance for Maintenance and Service

NOTE

CAUTION


3

4 PREPARATION BEFORE INSTALLATION

4.1 Confirm the position of suspension bolts

� Refer to Fig. 2 to see the diameter of suspension hole and confirm the bolt location.

� Install an inspection opening on the control box side for convenient maintenance and inspection of the parts such as electrical parts, refrigerant

connection nuts, temperature sensors, EXV coil, drain pump (if it has), etc. The inspection opening size should be no smaller than 450 450 mm2.

� Also inspection opening for repairing should be installed in the ceiling right below the unit. The size should be no smaller than the unit diameter B E shown in the Fig. 2.


Models A B C D E

YDCC066/078 1205 1235 1450 1213 222 YDCC095/115 1505 1535 1780 1513 237

*Note: indoor unit series type of A, B, C and D is determined by the specific letter in the bar code on the unit. For example, indoor unit YDCC*****-*C* means C type series unit and YDCC*****-*B* means B type.


Fig. 2 Indoor Unit Diameter

Models A B C D E

YDCC018/020/025

605 630 830 609 681

YDCC034 805 830 1030 809 881

YDCC045/053 910 935 1150 914 986


4

4.2 Install the suspension bolts

� Use a hole-in-anchor for existing ceilings, and a sunken insert, sunken anchor or other part to be procured in the field to reinforce the ceiling to bearing the weight of the unit for new ceiling. (Refer to Fig. 3)

� Note If the internal insulation material is PE, in installation process, please take some preventive measure to avoid brazing sparkle contacting the insulation material, which may result in fire.

Fig. 3 Suspension Bolt Installation

5 INDOOR UNIT INSTALLATION

5.1 Install the indoor unit temporarily

� Attach the hanger bracket to the suspension bolt. Be sure to fix it securely by using a nut and washer from the upper and lower sides of the hanger bracket. (Refer to Fig. 4)

Fig. 4 Indoor Unit Suspension

5.2 Tighten the nuts and adjust the height of the unit to reach the installation site

5.3 Check if the unit is horizontally level

� Make sure that the unit is installed level using a

spirit level or a plastic tube filled with water. (Refer to Fig. 5) (One thing to watch out for in particular is if the unit is installed so that the slope is not in the direction of the drain pipe, which might cause leaking.)

Fig. 5 Check Unit Level

5.4 Tighten the upper nuts

� Be sure the below washer and nut are installed within the hanger bracket for fear of bolt rolling out, this may result in danger.

6 REFRIGERANT PIPING WORK

� Execute insulation completely on both sides of the gas piping and the liquid piping. Otherwise, water leakage can result sometimes. Please use the insulation materials that can withstand temperature of at least 120°C. Reinforce the insulation on the refrigerant piping according to the installation environment. Otherwise, condensate water may form on the surface of the insulation.

Please follow the below items. � Apply ester oil or ether oil to the flare section

(internal and external surface) when using a flare connection.

� Only the flare nuts included with the unit can be used. Using different flare nuts may cause refrigerant leakage.

� To prevent dust, moisture or other contaminant from infiltrating the piping, either pinch the end or cover it with tape.

� Do not allow anything other than the designated refrigerant to get mixed into the refrigerant circuit, such as air, etc.

� When brazing the refrigerant piping, perform nitrogen replacement first, or perform brazing while feeding nitrogen into the refrigerant piping, and finally connect the indoor unit using the flare connections.

� When brazing a pipe while feeding nitrogen inside the pipe, make sure to set the nitrogen pressure to 0.02MPa (0.2kgf/cm2) or less using the pressure reducing valve.(This pressure is just like breeze blowing to your cheek.)

NOTE

NOTE

NOTE

CAUTION

CAUTION

CAUTION


5

� Do not use flux when brazing refrigerant piping. Therefore, use the phosphor copper brazing filler metal (BCuP) which does not require flux. If chlorine based flux is used, it will cause pipe corrosion and contamination of refrigerant oil

6.1 Connect the piping

� Be sure to use both a spanner and torque wrench together, as shown in Fig. 6, when connecting or disconnecting pipes to/from the unit.

Fig. 6 Piping Connection

� Refer to Table 1 for the tightening torque.

Table 1 Pipe Diameter

mm (inch) Tightening Torque

(N m) 6.35(1/4") 14 17 9.53(3/8") 32.5 40 12.7(1/2") 49.5 60

15.88(5/8") 62 75 19.05(3/4") 80 95 22.23(7/8") 100 115

� If no torque wrench is available, please follow the below method to do the installation. Using a wrench to tighten flare nuts causes the tightening torque to suddenly grow much tighter after a certain point. From that point, tighten the nut further by the appropriate angle listed in Table 2.

Table 2

Pipe Diameter mm (inch)

Further tightening angle

Recommended arm length of toll

6.35(1/4") 60 90 150mm

9.53(3/8") 60 90 200mm 12.7(1/2") 45 75 250mm

15.88(5/8") 45 75 300mm

19.05(3/4") 30 60 400mm

22.23(7/8") 30 60 400mm

Over tightening may damage the flare and cause leakage.

6.2 AIR TIGHT TEST

� Air tight test should be done after the piping connection completed.

� Operation method: (a) Fill in dry nitrogen into the refrigerant piping

and let the pressure slowly rise to 4.15MPa. (b) The specified pressure should be maintained

for 10 minutes, and then soapy water or other foaming agent are applied to the connection positions, such as brazing seams, screwed joints ,etc. for leakage detection.

(c) If it has leakage, then tighten or braze the leakage point.

(d) After it has been confirmed that the piping does not leak, the dwelling test should be performed. Fill in the dry nitrogen again and let the pressure slowly rise to 4.15MPa.

(e) The pressure needs to be maintained for 6 hours and then record the pressure value through the manometer. 24 hours later, record the pressure again.

(f) No pressure drop after 24 hours means it has no leakage. Otherwise, the leaking point must be found and mended. Then repeat the above (d) and (e) steps.

� Gas pressure is relevant to ambient temperature.So temperature should be considered when judging the pressure variation. The relationship of pressure and temperature is shown below.

21

1

273 1273

tP Pt

� ��

2correctionP P P� ��

P� — Pressure correction value (bar)

correctionP — the correced pressure value (bar)

1P— 1st

2P record pressure (bar)

— 2nd

1t record pressure (bar)

— 1st

1t record temperature (°C)

—2nd

record temperature (°C)

� Do not connect indoor units with outdoor units in during the air test process. Otherwise, it may result in nitrogen gas emtering into the outdoor unit.

6.3 Insulate the piping

� After checking it has no leakage, be sure to insulate the connection parts of both liquid and and gas pipe with sufficient thickness heat-resistant

NOTE

NOTE

CAUTION

CAUTION


6

polythylene materials. � Be sure to insulate the field piping all the way to

the piping connection inside the unit. Any exposed piping may casue condensate water or being burned if touched.

7 DRAIN PIPING WORK

� Drain pipe connection diameter may vary depending on different models. It can be divided as free drainage and pump drainage. So please confirm the model name and use the right method for that model.

� Be sure the drain pipe works well and smothly before making the duct connection. (It is not easy to check the drain pipe when the duct has been connected.)

7.1 Install the drain pipe

� Make sure the drain works properly. � Diameter of the drain pipe should be larger than or

equal to the one of the connecting pipe. (drain pipe connection diameter of indoor unit is 3/4” (19.05mm))

� Make a water trap on the drain pipe outlet from indoor unit. The water trap should meet below requirements. (A, B 50mm)

Fig. 7 Water Trap

� If central drain pipe has been used, keep the drain pipe short and sloping downwards at a gradient of at least 2/100 to prevent air pockets from forming. (Refer to Fig. 8)

� Select central drain pipe of proper size according to the total capacity of the connected unit.

>100mm Central drain pipe

Fig. 8 Central Drain Pipe

� For the indoor unit with pump drainage

(a) Be sure the drain raising pipe height is within 700mm.

(b) Place the drain raising pipe vertically and make sure it is no further than 300mm. (Refer to Fig. 8)

(c) The spare drain hole also needs to be

thoroughly insulated to avoid accumulating of condensate water.

Fig. 9 Pump Drainage

� To prevent the drain pipe from sagging, install hanging bracket every 1~1.5 m.

� When connecting the drain pipe, effective method should be carried out to guarantee no leakage on each connection area.

� To avoid condensate water accumulating on the drain pipe and dropping down, the drain pipe should be insulated.

7.2 Check the drain pipe

� After piping work is finished, check if drainage flows smoothly. (a) Free drainage

Gradually insert approximately 1000 ml clean water into the drain pan to check drainage status.

(b) Pump drainage

Remove the lid of the control box. Connect the relevant power supply and ground lines, then close the lid. Gradually insert approximately 1000 ml clean water from the fin coil side. Power on the unit and inspect the drain pump working status.

� The electric wiring works should be performed by

specially qualified electricians. � If no electricians in site, please flow the above

steps to do drainage confirmation after the system test running.

8 INSTALLING THE DUCT

� Materials for duct installation are supplied in the field.

� Refer to Fig. 10 to connect the duct.

NOTE

CAUTION


7

Fig. 10 Duct Connection

� Wrap both the inlet-side and outlet-side flange and the duct connection area with aluminium tape for something similar to prevent air escaping.

� Please attach an air filter inside the air passage on the inlet-side. (Use an air filter which duct collection efficiency (in a gravimetric technique) is higher than 50%)

� Be sure to insulate the duct to prevent condensate water from forming. (Material: glass wool or polyethylene foam, above 25mm thickness)

� Duct pressure drop of YDCC06~18/YDCC018~053

indoor unit models cannot be higher than 30 Pa; YDCC25~45/YDCC066~115 indoor unit models cannot be higher than 80 Pa; YDCC50~60/YDCC140~175 indoor unit models cannot be higher than 100 Pa.

� The air outlet cannot be too high and be positioned at the place where it directly blows the people for a long period.

� To reduce vibration and noise, it is better to useflexible connection to connect the air inlet andoutlet duct with indoor unit.

9 SET THE ESP

� YDCC06~18/YDCC018~053 indoor unit models’ ESP (External Static Pressure) can be divided as 3 types – 0 Pa, 15 Pa and 30 Pa;

YDCC25-45/YDCC066-115 indoor unit models’ ESP (External Static Pressure) can be divided as 3 types – 15 Pa, 40 Pa and 100 Pa; YDCC50~60/YDCC140~175 indoor unit models’ ESP (External Static Pressure) can be divided as 3 types – 15 Pa, 50 Pa and 100 Pa; Out factory state, YDCC indoor unit ESP is 15 Pa (default value). User can adjust the ESP according to the actual pressure drop of the air duct.

� Indoor unit ESP can be adjusted by changing the connection site of fan wiring in the control board. For detail setting method of different indoor ESP, please refer to the wiring diagram attached to the control box lid.

10 ELECTRIC WIRING WORK

10.1 General introduction

� Shut off the power before doing any work. � All field supplied parts and materials and electric

works must conform to local laws. � All wiring works should be performed by specially

qualified electricians. � Install a wiring interrupter or ground-fault circuit

interrupter for the power supply wiring. � Be �� Be sure the air-conditioner is well grounded. Never

connect the ground line with gas pipe, water pipe, lightning conductor or telephone lines.

� Do not turn on the power sully unless all the work has been done.

� Wiring of different thickness or diameter cannot be connected to one power supply wiring terminal.

� For wiring, please use the designated power supply wiring and connect firmly, then secure to prevent external pressure being exerted on the terminal board.

� The terminal screw should not be tightened too hard or too loose. Too hard may damage the terminal board and too loose may result in bad connection and danger due to terminal board overheating.

10.2 Electrical parameters

Indoor unit power supply and Max operation current

Indoor Unit Model Power Supply

Max Operation Current(A)

BTU type kW type H0 type

(or Cooling Only) H2 type H4 type

YDCC06 09 YDCC018 025

220V 50Hz

0.26 4.76 - YDCC12 25 YDCC034 066 0.85 8.15 9.85 YDCC30 45 YDCC078 115 1.31 10.31 15.81

YDCC50 YDCC140 2.8 - - YDCC60 YDCC175 3.18 - -

NOTE

CAUTION


8

10.3 Power distribution

� Refer to Fig. 11 for power distribution of the system.

Fig. 11 Indoor and Outdoor Units Power Distribution Diagram

� An independent refrigeration system is controlled by a single switch and several systems cannot be controlled with a switch. Especially forbid some indoors unit in a system sharing a control switch with other system, while the other indoor units are controlled by another switch.

10.4 Indoor unit field wiring

� For detail indoor unit wiring, see the “Wring Diagram” attached to the control box lid when laying the indoor unit electrical wiring.

10.5 Setting indoor unit model

� Refer to the “Wring Diagram” attached to the control box lid for indoor unit model setting.

10.5 Communication network

Note: indoor unit communication lines TB2, TB3 (TB2 in, TB3out) cannot be conversely connected, otherwise it will have communication failure and the unit cannot startup.

Fig. 12 Connection Line Connection


9

10.7 Install the controller

� Install the wire controller on the pre-reserved site on the wall.

� Carcassing for communication wiring should be ready before installation the controller. The recommended communication line is RVSP20.75. Be sure to pull the wires through the PVC conduit. Note: the communication wire and PVC conduit are the field supplied parts.

10.8 Connect the wire controller and indoor unit

� Group control can be realized through the wire controller. For YDCC-B (C, D) series indoor unit, one wire controller can connect to max 4 indoor units. Note: indoor unit series type of A, B, C and D is

determined by the specific letter in the bar code attached on the unit. For example, indoor unit YDCC*****-*C* means C type series unit and YDCC*****-*B* means B type.

� The indoor units in one group should be connected in a same power supply to guarantee normal initialization of wire controller when power on.

� Connection of indoor unit and wire controller: (a) One wire controller connecting only one

indoor unit: (refer to the wiring diagram) (b) One wire controller connecting multi indoor

units: For YDCC-B (C, D) series indoor unit, wiring diagram of wire controller and the indoor units is shown in Fig. 14.

Fig. 13 One wire controller connects to multi indoor units (B, C or D type)

721239

YDCC-03 IOM(English)(YGF)(0911)NOTHING

Date post:	16-Oct-2021
Category:	Documents
Upload:	others
View:	9 times
Download:	0 times

YORK VRF Air-Conditioner

Documents