Post on 05-Nov-2019
transcript
Installation and maintenance manual
Large installation Drainback
Solar DrainbackDB40S
DB50DB100DB150
en
Dear customer,Thank you for purchasing this equipment.
Before using the product, please read this manual carefully and keep it in a safe place for future reference. In order to ensure continued safe and efficient operation, we recommend that the product is regularly inspected and maintained. Our after-sales and maintenance department can help you with this.
We trust that this product will deliver exceptional performance for many years.
3
Contents
Solar DrainbackEN7662865 - v07 - 20102017
Table of contents1 Safety 5
1.1 General safety instructions 5
1.1.1 General safety 5
1.1.2 Electrical safety 6
1.2 Recommendations 6
2 About this manual 8
2.1 General Information 8
2.2 Symbols used 8
3 Technicalspecifications 9
3.1 Directives 9
3.2 Technical data 9
3.3 Dimensions and connections 10
3.3.1 DB40S 10
3.3.2 DB50 and DB100 11
3.3.3 DB150 12
3.4 Electrical diagram 13
3.4.1 DB40S 13
3.4.2 DB50, DB100 and DB150 13
4 Description of the product 14
4.1 Description of the product 14
4.2 Operating principle 15
4.3 Main components 16
4.3.1 DB40S 16
4.3.2 DB50, DB100 and DB150 16
4.4 Standard delivery 17
5 Before installation 18
5.1 Installation regulations 18
5.2 Electrical requirements 18
5.3 Design of the installation 18
5.3.1 Location dimensions 18
5.3.2 Accumulator location 18
5.3.3 Minimum incline 19
5.3.4 Balancing valves 19
5.3.5 Installation examples 20
5.3.6 Pipe diameter calculation 30
5.3.7 Checking the volume 30
5.3.8 Quantity of antifreeze 31
6 Installation 32
6.1 General 32
6.2 Hydraulic diagram 32
6.2.1 DB40S 32
6.2.2 DB50, DB100 and DB150 33
6.3 System connection 33
6.4 Filling the installation 34
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Contents
Solar Drainback EN7662865 - v07 - 20102017
6.4.1 General 34
6.4.2 Checks before filling 34
6.4.3 DB40S 35
6.4.4 DB50, DB100 and DB150 35
6.4.5 Checks after filling 36
7 Solar control 37
7.1 Description of the Basic solar control 37
7.1.1 Keys 37
7.1.2 System monitoring screen 37
7.1.3 Channel indicator 37
7.1.4 Symbol bar 37
7.1.5 System diagram 38
7.2 Description of the Premium solar control 38
7.2.1 Keys and dial 38
8 Frequency inverter 40
8.1 General 40
8.2 Description of the frequency inverter 40
8.2.1 Functions of the screen and keys 40
8.3 Auto adjustment 41
8.4 Automatic mode 42
9 Commissioning 43
9.1 General 43
9.2 Checklist before commissioning 43
9.3 DB40S commissioning procedure 43
9.3.1 Procedure 43
9.3.2 Basic factory setting values 44
9.4 Commissioning procedure for the DB50, DB100 and DB150 44
9.4.1 Procedure 44
9.4.2 Premium factory setting values 46
10 Maintenance 49
10.1 General 49
10.2 Standard servicing and maintenance operations 49
11 Troubleshooting 50
11.1 General malfunctions 50
11.2 DB40S malfunctions 51
11.3 DB50, DB100 and DB150 malfunctions 51
12 Decommissioning 52
12.1 Decommissioning procedure 52
12.2 Recommissioning procedure 52
13 Disposal 53
13.1 Disposal and recycling 53
5
1 Safety
Solar DrainbackEN7662865 - v07 - 20102017
1 Safety
1.1 General safety instructions
1.1.1 General safety
DangerThis appliance can be used by children aged 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they are given correct supervision or instruction on using the appliance in complete safety and understand the hazards involved. Children must not play with the appliance. Cleaning and user maintenance must not be carried out by children without supervision.
Danger of electrocutionBefore any work, switch off the power supply to the appliance.
CautionUse only genuine spare parts.
NoteOnly qualified professionals are permitted to install the appliance, in accordance with prevailing local and national regulations.
WarningDo not touch the pipes. Depending on the settings, the temperature of the pipes may exceed 60 °C.
WarningTake care with the domestic hot water. Depending on the settings, the temperature of the domestic hot water may exceed 60 °C.
WarningOnly qualified professionals are authorised to work on the appliance and system installation.
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1 Safety
Solar Drainback EN7662865 - v07 - 20102017
NoteThe installation must comply with all the provisions of the current regulations and directives governing work and interventions in individual homes, blocks of flats and other buildings.
1.1.2 Electrical safety
CautionIf the appliance is supplied with a power supply cable which is damaged, it must be replaced by the manufacturer, its After-Sales department or persons with similar qualifications in order to avoid any danger.
NoteThe installation must comply with all the provisions of the current regulations and directives governing work and interventions in individual homes, blocks of flats and other buildings.
CautionDo not neglect to service the appliance. Contact a qualified professional or take out a maintenance contract for the annual maintenance of the appliance
1.2 Recommendations
CautionThe installation must comply with all the provisions of the regulations (DTU, EN, etc.) governing work and interventions in individual homes, blocks of flats or other buildings.
NoteKeep the appliance accessible at all times.
NoteRegularly check that the system is operating correctly.
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1 Safety
Solar DrainbackEN7662865 - v07 - 20102017
NoteNever remove or cover the labels and data plates affixed to appliances. The labels and data plates must be legible throughout the entire service life of the appliance.Damaged or illegible instructions and warning stickers must be replaced immediately.
NoteOnly remove the casing to perform maintenance and repair work. Refit the casing after maintenance and repair work.
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2 About this manual
Solar Drainback EN7662865 - v07 - 20102017
2 About this manual
2.1 General Information
This manual is intended for installers of Solar Drainback systems.
2.2 Symbols used
This manual uses various danger levels to draw attention to certain special instructions. This is to improve user safety, prevent potential problems and guarantee that the appliance operates correctly.
DangerRisk of dangerous situations that may result in serious personal injury.
Danger of electrocutionRisk of electric shock.
WarningRisk of dangerous situations that may result in minor personal injury.
CautionRisk of material damage.
NoteHighlights important information.
AdviceReference to other manuals or pages in this manual.
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3 Technical specifications
Solar DrainbackEN7662865 - v07 - 20102017
3 Technical specifications
3.1 Directives
This product complies with the requirements of the following European Directives and standards:• Electromagnetic Compatibility Directive 2004/108/EC
Generic standards: EN 61000-6-3, EN 61000-6-1Relevant Standard: EN 55014
• 2006/95/EC Low Voltage DirectiveGeneric standard: EN 60335-1
For all provisions and Directives referred to in these instructions, it is agreed that all addenda or subsequent provisions will apply at the time of installation.
3.2 Technical data
Tab. 1 Technical data for Solar Drainback systems
DB40S DB50 DB100 DB150
Maximum field of collectors m2 38 50 100 150
Tank capacity l 100 100 150 200
Manometric head of the pump m 25 30 25 30
Nominal flow rate l/h 1140 1500 3000 4500
Supply voltage V 1~230/50 Hz 1~230/50 Hz 1~230/50 Hz 1~230/50 Hz
System output kW 0,56 1,16 1,22 2,42
Maximum current A 4 3 3 3,3
Protection rating IP 20 20 20 20
Solar control box model Basic Premium Premium Premium
Domestic hot water loop (1) Yes Yes Yes
High-efficiency pack Yes Yes Yes
Energy meter Yes Yes Yes
(1) The domestic hot water loop consists of a heat exchanger and an accelerator pump for the domestic hot water loop.
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3 Technical specifications
Solar Drainback EN7662865 - v07 - 20102017
3.3 Dimensions and connections
3.3.1 DB40S
Tab. 2 DB40S connections
Connection Size
1 Connection above the accumulator coil G1” M
2 System return (upper connection of solar panels) G1” M
3 System drain (used for commissioning) G1/2” M
4 Flow pipe to solar installation (lower connection of solar panels)
G1” M
5 Supply cable (included) -
6 Feedthroughs for temperature sensors -
7 Filling/draining the installation G1/2” M
8 Connection below the accumulator coil G1” M
1790
600 600 88
1
56
43
87
2300
406512
295512474 533 41,5
93
1731
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3 Technical specifications
Solar DrainbackEN7662865 - v07 - 20102017
3.3.2 DB50 and DB100
Tab. 3 DB50 and DB100 connections
Connection Size
1 System return (upper connection of solar panels) G1” M
2 System drain (used for commissioning) G1/2” M
3 Flow pipe to solar installation (lower connection of solar panels)
G1” M
4 Supply cable (included) -
5 Feedthroughs for temperature sensors -
6 Filling/draining the installation G1/2” M
7 Domestic hot water outlet G1” M
8 Domestic hot water inlet G1” M
1790
600 600
45
32
876
1
300406
512
295
512406474 533 41,5
93
1731
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3 Technical specifications
Solar Drainback EN7662865 - v07 - 20102017
3.3.3 DB150
Tab. 4 DB150 connections
Connection Size
1 System return (upper connection of solar panels) G1” M
2 System drain (used for commissioning) G1/2” M
3 Flow pipe to solar installation (lower connection of solar panels)
G1” M
4 Supply cable (included) -
5 Feedthroughs for temperature sensors -
6 Filling/draining the installation G1/2” M
7 Domestic hot water outlet G1” M
8 Domestic hot water inlet G1” M
2174
600 600
45
32
876
1
300406
512
295
512406474 533 41,5
93
2115
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3 Technical specifications
Solar DrainbackEN7662865 - v07 - 20102017
3.4 Electrical diagram
3.4.1 DB40S
A Basic solar controlB Electrics boxC Solar pumpD Switch
3.4.2 DB50, DB100 and DB150
AB
D
2 4
1
A1
A2
3L
C
L
N
N
A1 A2
1 3 L N
4
2
R1 N L N L N
L
N
L N
230V,50Hz
1 (1) A 240 V~
LNR1
N
201918
1716151413121 2
IP 20
T2 A100 ... 240 V~
50-60 Hz
Temp . Sensor Pt1000S2S1 S3 S4 VBus
PWM
VFD
Made in GermanyDeltaSol® CS/2
3 4 5 6 7 8 9 10
A Premium solar controlB Frequency inverterC EMI filterD InductanceE Solar pumpF Energy meterG Domestic hot water loop accelerator pump
A B
C DE
F G
L N
U1 V1 W1
U1
K K1
U2
LN
L
R4
R4
PWMA AI1
COM
+24V
LI1
L
LN
N
U1U2
1-23-4
S6
N
R2
N
U /T1
V /T2
W /T3
230V,50Hz
R /L1
S /L2
8888 88 88
ESC
RefValue
CAN Run CAN Err
UnitMon
Conf
N N N N
R3 R2 R1 L 1 2 3 4 5 6 7 8 9
10 11
VBus
VBu
s
S5/V
40
S4S3
GN D
S6
S7
Sensor s
S2S1
100 ... 240 VT4 A
50-60 Hz
N
R3 R2 R1 L
R1-R3| 1 (1) A 240 V~R4 |1 (1) A 30 V
IP 20
R4
PWM
A0-
10 V
PWM
B0-
10 V
SD
R4
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4 Product description
Solar Drainback EN7662865 - v07 - 20102017
4 Description of the product
4.1 Description of the product
The Solar Drainback system is a compact unit providing protection against overheating. Conventional installations are prone to overheating which can shorten their service life and require intervention from maintenance engineers. With Drainback systems, solar installations with a large surface area are fully protected against this issue.Solar Drainback systems offer the following advantages:• Passive safety to protect against overheating. This means that the
solar system is protected under all circumstances, including in the event of a power supply fault.
• A wide range covering the vast majority of solar energy installations.• A manometric head of up to 35 m, depending on the model, which
covers the majority of building heights.• Guaranteed protection against overpressure as, on expansion, the
heat transfer fluid is absorbed by the air contained in the installation itself.
• Installation time is minimised as the system is supplied fully assembled and configured.
• Easy to use, the Drainback system needs no expansion vessels, air bleed valves, heat sinks (air heaters), 3-way valves or air separators.
• Reduced maintenance costs. The heat transfer fluid does not degrade, there are fewer components to check and the system constantly operates at low pressure: all these factors dramatically reduce preventive and corrective maintenance costs.
• Better adaptability to the uses of the installation. In buildings which have varying patterns of use, (e.g. schools, hotels, sports centres), the Drainback system is always available to meet the demand, while remaining in hibernation mode when it is not needed.
Premium units (DB50, DB100 and DB150) offer the following additional functions:• Energy meter used to measure energy savings.• Solar control box equipped with the VBus protocol enabling
connection to the building management software for remote monitoring of the operation of the installation.
• Heat exchanger for the built-in domestic hot water tank.• High-efficiency pack enabling the solar pump flow rate to be adapted
to the demand.
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4 Product description
Solar DrainbackEN7662865 - v07 - 20102017
4.2 Operating principle
The operating principle is as follows:1 When idle, the solar panels remain empty, and the heat transfer fluid
is stored inside the Drainback unit.
2 When there is a demand and the sun is shining, the solar circuit pump starts up, transferring the heat transfer fluid to the panels.
3 Once the demand is satisfied, the pump stops and the heat transfer fluid returns to the Drainback unit owing to the effect of gravity. In this way, although there is still solar radiation, there is no vapour formed and the antifreeze is not degraded.
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4 Product description
Solar Drainback EN7662865 - v07 - 20102017
4.3 Main components
4.3.1 DB40S
1 Control box2 Safety valve3 Electrics box4 Pressure gauge5 Solar circuit pump6 Flow regulator7 Drainback vessel8 Drain valve
6
7
1
2
8
3
5
4
1
2
6
9
487
3
5
10
4.3.2 DB50, DB100 and DB150
1 Control box2 Safety valve3 Pressure gauge4 Solar circuit pump5 Flow regulator6 Frequency inverter7 Domestic hot water loop accelerator pump8 Energy meter9 Heat exchanger10 Drainback vessel
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4 Product description
Solar DrainbackEN7662865 - v07 - 20102017
4.4 Standard delivery
Each Solar Drainback system package contains;• A Solar Drainback system• A pre-configured Basic or Premium solar control• Two PT1000 temperature sensors• Warranty card• An installation and maintenance manual• EC Declaration of conformity
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5 Before installation
Solar Drainback EN7662865 - v07 - 20102017
5 Before installation
5.1 Installation regulations
CautionThe system must be installed by a qualified professional in accordance with prevailing local and national regulations.
5.2 Electrical requirementsTab. 5 Electrical data
Values
Supply voltage 1~230 V/50 Hz
Power supply Single phase
5.3 Design of the installation
5.3.1 Location dimensions
Decide on the ideal position for the installation, taking into account the legal provisions and the requirements in terms of space for the appliance. Allow sufficient space around the Drainback system to ensure adequate access to the appliance and enable any and all maintenance operations to be carried out.The dimensions shown in the figure should be used as a guideline.
1500
≥300
≥300
500
5.3.2 Accumulator location
The distance between the upper connection on the collectors and the accumulator must be between 2 and 25 m, depending on the model.
Related informationTechnical data, page 9.
Note(1) For greater heights, contact our technical department.
Hmin = 2mHmax = 35m(1)
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5 Before installation
Solar DrainbackEN7662865 - v07 - 20102017
5.3.3 Minimum incline
To ensure the correct operation of the Drainback system, the routing of the connection pipes between the solar collectors and the Solar Drainback system must not include any kind of siphon or rising gradient, as this would impede this system from draining.
CautionThe horizontal sections of piping must have a minimum incline of 3º to enable the installation to drain. However, greater inclines are recommended, where possible.
It is important not to oversize the connection pipes as this would produce excess fluid in the installation. Similarly, it is essential to check that the pipes do not create an excessive pressure drop as this would reduce the manometric capacity of the installation and could even impair its operation.
Related informationPipe diameter calculation, page 30.
In DB40S systems, the solar accumulator coil inlet must be below the Drainback vessel outlet, where possible. An air vent device must be fitted at the highest connection point. The air vent must be able to be isolated. After filling, the section A-B will be completely drained. Any air pockets remaining in this piping will affect the correct operation of the pump.
≥3%
A
B
A
B
5.3.4 Balancing valves
The balancing valves are used to regulate the flow circulating in each of the collector coils.For those installations where it is not possible to create an inverted return, it is recommended to use balancing valves to balance the flows circulating through each row of collectors.Where possible, it is recommended to design the rows of collectors minimising the number of collectors to ensure balance.
CautionThe flow rates on each row must be regulated to ensure a constant flow rate (15-60 l/h·m2) for each collector.
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5 Before installation
Solar Drainback EN7662865 - v07 - 20102017
5.3.5 Installation examples
■ DB40S Drainback system and instantaneous combi boiler (residential building)
>3% >3%
SF1
SM
T
SM
T
1
3
2
54 7 8
9
1011
12
13
14
1516
6
1 Solar energy2 Temperature sensor on collectors3 DB40S Drainback system4 Shut-off valve5 Safety valve6 Vasoflex7 Retaining valve8 Pump9 On/off valve10 Draining the installation11 Domestic hot water accumulator12 Three-way thermostatic valve13 Instantaneous combi boiler14 Heating15 Domestic hot water16 Domestic cold water
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5 Before installation
Solar DrainbackEN7662865 - v07 - 20102017
■ DB40S Drainback system and condensing boiler for DHW and 1 direct heating circuit
ST
T KP
HP
TLP
TZP
>3% >3%
SF1
S
T
T
M
TTWF
SF4
M
M
SVFK
SRFK
SATF
T
1
2
3
4
5 6
7
9
8
10 11 1213
14
16 171518
19
20
21
22
23
1 Solar energy2 Temperature sensor on collectors3 DB40S Drainback system4 Shut-off valve5 Draining the installation6 Domestic hot water interaccumulator7 Safety valve8 Vasoflex9 Retaining valve10 Counter11 Screen filter12 Mains power supply13 Domestic cold water14 Energy metering module15 Radiator flow pipe16 Domestic hot water17 Radiator return18 Domestic hot water recirculation pump19 Thermometer20 Three-way valve with domestic hot water recirculation21 Heating circuit 22 Pressure gauge23 Condensing boiler
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5 Before installation
Solar Drainback EN7662865 - v07 - 20102017
■ DB40S Drainback system and instantaneous combi boiler with solar kit (residential building)
>3% >3%
SF1
MS
M
1
3
4
5
6
78
9
10
11
12
1314
2
1 Solar energy2 Temperature sensor on collectors3 DB40S Drainback system4 Shut-off valve5 Safety valve6 Pump7 Draining the installation8 Solar interaccumulator9 Vasoflex10 Solar kit11 Instantaneous combi boiler12 Heating13 Domestic hot water14 Domestic cold water
23
5 Before installation
Solar DrainbackEN7662865 - v07 - 20102017
■ DB40S Drainback system and centralised boiler for DHW
>3% >3%
SF1
SF4
SATF
STWFTLP
M
T T
1
2
3
4
5
6
8
9 10 11 1213
14
17
18
19
20
15
16
7
1 Solar energy2 Temperature sensor on collectors3 DB40S Drainback system4 Shut-off valve5 Safety valve6 Draining the installation7 Solar interaccumulator8 Vasoflex9 Retaining valve10 Counter11 Screen filter12 Mains power supply13 Domestic cold water14 Three-way valve with domestic hot water recirculation15 Domestic hot water recirculation pump16 Thermometer17 Pressure gauge18 Pump19 Three-way mixing valve20 Centralised boiler
24
5 Before installation
Solar Drainback EN7662865 - v07 - 20102017
■ DB40S Drainback system and condensing boiler for DHW and 1 direct heating circuit (tertiary sector)
>3% >3%
SF1
SF4
SATF
S2
TLPM
T T
HPM
TSF4
1
2
3
4
6
5
78
9 10 11 1213
14
15
16
17
1819
2021
22
2324
1 Solar energy2 Temperature sensor on collectors3 DB40S Drainback system4 Shut-off valve5 Safety valve6 Draining the installation7 Solar interaccumulator8 Vasoflex9 Retaining valve10 Counter11 Screen filter12 Mains power supply13 Domestic cold water14 Accelerator pump15 Thermometer16 Domestic hot water17 Four-way valve18 Domestic cold water19 Domestic hot water backup accumulator20 Pump21 Pressure gauge22 Heating circuit23 Condensing boiler
25
5 Before installation
Solar DrainbackEN7662865 - v07 - 20102017
■ DB50/100/150 Drainback system and instantaneous combi boiler (residential building)
>3% >3%
SF1
SM
T
SM
T
1
3
2
4 6 7
8
910
11
12
13
1415
5
1 Solar energy2 Temperature sensor on collectors3 DB50/DB100/DB150 Drainback system4 Safety valve5 Vasoflex6 Retaining valve7 Pump8 On/off valve9 Draining the installation10 Domestic hot water accumulator11 Three-way thermostatic valve12 Instantaneous combi boiler13 Heating14 Domestic hot water15 Domestic cold water
26
5 Before installation
Solar Drainback EN7662865 - v07 - 20102017
■ DB50/100/150 Drainback system and condensing boiler for DHW and 1 direct heating circuit
ST
T KP
HP
TLP
TZP
>3% >3%
SF1
S
T
T
M
TTWF
SF4
M
M
SVFK
SRFK
SATF
T
1
2
3
4
5 6
7
9
8
10 11 12
14
16 171518
19
20
21
22
23
1 Solar energy2 Temperature sensor on collectors3 DB50/DB100/DB150 Drainback system4 Shut-off valve5 Draining the installation6 Domestic hot water interaccumulator7 Safety valve8 Vasoflex9 Retaining valve10 Counter11 Screen filter12 Mains power supply13 Domestic cold water14 Energy metering module15 Radiator flow pipe16 Domestic hot water17 Radiator return18 Domestic hot water recirculation pump19 Thermometer20 Three-way valve with domestic hot water recirculation21 Heating circuit 22 Pressure gauge23 Condensing boiler
27
5 Before installation
Solar DrainbackEN7662865 - v07 - 20102017
■ DB50/100/150 Drainback system and instantaneous combi boiler with solar kit (residential building)
>3% >3%
SF1
M
S
M
1
3
4
5
6
78
9
10
11
12
1314
2
1 Solar energy2 Temperature sensor on collectors3 DB50/DB100/DB150 Drainback system4 Shut-off valve5 Safety valve6 Pump7 Draining the installation8 Solar interaccumulator9 Vasoflex10 Solar kit11 Instantaneous combi boiler12 Heating13 Domestic hot water14 Domestic cold water
28
5 Before installation
Solar Drainback EN7662865 - v07 - 20102017
■ DB50/100/150 Drainback system and centralised boiler for DHW
>3% >3%
SF1
SF4
SATF
STWFTLP
M
T T
1
2
3
4
5
6
8
9 10 11 1213
14
17
18
19
20
15
16
7
1 Solar energy2 Temperature sensor on collectors3 DB50/DB100/DB150 Drainback system4 Shut-off valve5 Safety valve6 Draining the installation7 Solar interaccumulator8 Vasoflex9 Retaining valve10 Counter11 Screen filter12 Mains power supply13 Domestic cold water14 Three-way valve with domestic hot water recirculation15 Domestic hot water recirculation pump16 Thermometer17 Pressure gauge18 Pump19 Three-way mixing valve20 Centralised boiler
29
5 Before installation
Solar DrainbackEN7662865 - v07 - 20102017
■ DB 50/100/150 Drainback system and condensing boiler for DHW and 1 direct heating circuit (tertiary sector)
>3% >3%
SF1
SF4
SATF
S2
TLPM
T T
HPM
TSF4
1
2
3
4
6
5
78
9 10 11 1213
14
15
16
17
1819
2021
22
2324
1 Solar energy2 Temperature sensor on collectors3 DB50/DB100/DB150 Drainback system4 Shut-off valve5 Safety valve6 Draining the installation7 Solar interaccumulator8 Vasoflex9 Retaining valve10 Counter11 Screen filter12 Mains power supply13 Domestic cold water14 Accelerator pump15 Thermometer16 Domestic hot water17 Four-way valve18 Domestic cold water19 Domestic hot water backup accumulator20 Pump21 Pressure gauge22 Heating circuit23 Condensing boiler
30
5 Before installation
Solar Drainback EN7662865 - v07 - 20102017
5.3.6 Pipe diameter calculation
To size the piping, it is recommended that the linear pressure drop of the pipes does not exceed 40 mmH2O/m and the maximum speed does not exceed 2 m/s (the design flow rate taken into account is 30 l/h·m2).
Tab. 6 Diameter of piping with a 30% glycol concentration at 40 ºC
Flow (l/h)Recommended diameter Large diameter
Nominal diameter v (m/s) ΔP(mmH2O/m) Nominal
diameter v (m/s) ΔP(mmH2O/m)
500 Ø22x1.0 0.44 18.4 Ø28x1.5 0.28 6.4
1000 Ø28x1.5 0.57 21.2 Ø35x1.5 0.35 6.6
1500 Ø28x1.5 0.85 42.9 Ø35x1.5 0.52 13.3
2000 Ø35x1.5 0.69 22.0 Ø42x1.5 0.47 8.6
2500 Ø35x1.5 0.86 32.4 Ø42x1.5 0.58 12.7
3000 Ø35x1.5 1.04 44.7 Ø42x1.5 0.70 17.4
3500 Ø42x1.5 0.82 22.8 Ø54x2.0 0.49 7.1
4000 Ø42x1.5 0.93 28.9 Ø54x2.0 0.57 8.9
4500 Ø42x1.5 1.05 36.2 Ø54x2.0 0.63 11.1
5.3.7 Checking the volume
Tab. 7 Tank volumes
DB40S DB50 DB100 DB150
Tank volume 100 L 100 L 150 L 200 L
Tab. 9 Installation volumes
Number of SOL250 collectors
Solar capture surface area (m2)
Collectorfieldvolume (L) Max.flow(l/h) Recommended internal
diameter (mm)Volume per linear metre (L/m)
8 20 18.4 1500 25 0.49
10 25.0 23.0 1500 25 0.49
15 37.5 34.5 1500 25 0.49
20 50.0 46.0 1500 25 0.49
25 62.5 57.5 3000 32 0.80
30 75.0 69.0 3000 32 0.80
35 87.5 80.5 3000 32 0.80
40 100.0 92.0 3000 32 0.80
45 112.5 103.5 4500 39 1.19
50 125.0 115.0 4500 39 1.19
55 137.5 126.5 4500 39 1.19
60 150.0 138.0 4500 39 1.19
CautionWe must ensure that the theoretical volume of the installation is less than the storage volume of the tank to guarantee that the unit can store the entire volume of the installation. If the volume of the installation is greater than the volume of the tank, the installation's drainpipes will have to be used to store the excess fluid.
31
5 Before installation
Solar DrainbackEN7662865 - v07 - 20102017
■ Installation example
We have an installation with 35 SOL250 solar collectors, i.e. the total solar capture surface area is 87.5 m2 and the collector field volume is 80.5 L.Solar capture surface area:Scap = 35 x 2.5 m2 = 87.5 m2
Collectorfieldvolume:Vcap=35 x 2.3 L = 80.5 L
If the total height is 20 m, with a horizontal distribution section measuring 50 m, in total, there will be 90 m of pipework with an interior diameter of 32 mm. This length of piping corresponds to a total volume of 72 L.Pipework volume:LP=20+20+50=90 m pipingVP=90 m·0.8 L/m=72 L
These 72 L are added to the 80.5 L from the collector field, to obtain a theoretical volume of 152.5 L in total for the installation.Total theoretical volume:VT=Vcap+VP=72 L+80.5 L=152.5 L
Taking a 20% safety margin, the total required volume of the Drainback to store the entire volume necessary for the installation is 183 LVolume of Drainback unit:VDB=VT·1.2=152.5 L·1.2=183 L
In this case, a DB150 system with a tank with a capacity of 200 L must be used, this ensures that the total volume of fluid in the installation is stored inside the tank of the DB150 system.
5.3.8 Quantity of antifreeze
BAXI heat transfer fluid can be used to fill the installation, in the correct concentration for the minimum foreseeable outdoor temperature in the location. If it can be guaranteed that the fluid in the installation will always be stored in the tank, the glycol concentration can be reduced; otherwise, it is recommended to use a mix of water and glycol in the following proportions:
Tab. 8 Concentration of heat transfer fluid
Volume of heat transfer fluid 26% 33% 37%
Minimum outdoor temperature -10 ºC -15 ºC -20 ºC
CautionUnder no circumstances should the mixture of water and glycol exceed 40%.
WarningAlthough it is non-toxic, odourless and biodegradable, it is appropriate to take precautions when handling the product. You are recommended to use gloves which are resistant to chemical products and to wear suitable eye protection when handling the product.
WarningIf the fluid comes into contact with your skin, wash it with soap and water. If it comes into contact with your eyes, wash them immediately with plenty of clean running water.
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6 Installation
Solar Drainback EN7662865 - v07 - 20102017
6 Installation
6.1 General
The following observations must be taken into account for a Solar Drainback installation:• Once all the hydraulic connections have been completed, check the
sealing of the entire circuit.• It is helpful to protect the collectors from the potential effects of
solar radiation once the packaging has been removed, until the installation has been filled.
• If there is no demand, or it is anticipated that there will be long periods without any DHW being extracted, it is recommended to protect the system using thermal blankets.
• Once all the connections on the solar control box sensors have been completed, it is important to check that these do not run across other electrical cables as this could generate interference and alter the readout values.
• It is recommended to use a shielded cable for the sensor connections.
6.2 Hydraulic diagram
6.2.1 DB40S
1 Flow pipe to the solar installation2 Return from the solar installation3 System drain4 Upper coil connection5 Drain valve6 Lower coil connection7 Filling branch pipe
1
DB40
23
4
67
5
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Solar DrainbackEN7662865 - v07 - 20102017
6.2.2 DB50, DB100 and DB150
1 Flow pipe to the solar installation2 Return from the solar installation3 System drain4 Solar circuit heat exchanger input5 Solar circuit heat exchanger output6 Filling branch pipe7 Domestic hot water inlet8 Domestic hot water outlet
Tout
12
3
85
6
74
DB50, DB100 y DB150
6.3 System connection
WarningCarry out the electrical connections on the appliance according to the requirements of current standards, the information given in the wiring diagrams provided with the appliance and the recommendations in this instruction manual. Only qualified professionals may carry out electrical connections, always with the power off.
Earth the appliance before making any electrical connections.Disconnect the mains supply before carrying out any work on the appliance and the accessories connected to the appliance.The Drainback system is supplied fully prewired. Do not modify the connections inside the control unit.The electrical power supply is obtained via the connection cable prewired in the appliance.
WarningIf the power cable is damaged, for safety reasons this must only be replaced by the manufacturer, by its After-Sales department or by qualified personnel.
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6 Installation
Solar Drainback EN7662865 - v07 - 20102017
The appliance must be powered with a circuit equipped with a multipole switch with a contact opening distance of 3 mm.Earthing must comply with the prevailing installation standards.
CautionSeparate the sensor cables from the 230 V circuit cables.The installation must be fitted with a main switch.
All the connections are made on the terminal blocks supplied for this in the Drainback system connection box.
NoteFailure to observe these rules may result in interference and malfunctioning of the controller, and even damage to the electronic circuits.
6.4 Filling the installation
6.4.1 General
CautionDuring the start-up process, pay particular attention to cover the collectors, in order to avoid an undesirable increase in pressure.
CautionThe installation must be filled with the system empty.
6.4.2 Checksbeforefilling
Before filling the installation, check the sealing of the entire circuit to ensure that there are no leaks in the system:1 Pressurise the installation with water.2 Check the sealing of the installation.3 Configure solar control relay 1 in manual mode and set it to 100%.
Related informationSolar control, page 37
4 Regulate the total flow rate.5 Balance the rows.
Related informationBalancing valves, page 19
6 Switch off the pump.7 Drain the installation
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6 Installation
Solar DrainbackEN7662865 - v07 - 20102017
BA C D
E F
6.4.3 DB40S
Close all the valves before filling the installation:
NoteThe installation must be filled using mechanical or electrical filling equipment.
1 Calculate the amount of antifreeze fluid required for the installation.
Related informationQuantity of antifreeze, page 31.
2 Mix the amount of antifreeze fluid required with tap water.3 Connect the outlet of the filling unit to the filling valve on the
installation (E).4 Open the filling valve on the installation (E).5 Fill until the filling station pressure is reached (the solar accumulator
coil will be full).6 Open the upper connection valve to the accumulator coil (A). The
Drainback tank will begin to fill.7 Open the system's drain valve (C) until fluid flows out.8 Close the filling valve on the installation (E).9 Close the system's drain valve (C).
NoteThe order of steps 8 and 9 is important to avoid over-pressurising the system.
6.4.4 DB50, DB100 and DB150
Close all the valves before filling the installation.
NoteThe installation must be filled using mechanical or electrical filling equipment.
1 Calculate the amount of antifreeze fluid required for the installation.
Related informationQuantity of antifreeze, page 31.
2 Mix the amount of antifreeze fluid required with tap water.3 Connect the outlet of the filling unit to the filling valve on the
installation (D).4 Open the filling valve on the installation (D).5 Open the system's drain valve (B).6 Fill the system until the heat transfer fluid flows out of the drain valve (B).7 Close the filling valve on the installation (D).8 Close the system's drain valve (B).
NoteThe order of steps 6 and 7 is important to avoid over-pressurising the system.
A B C
D E F
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Solar Drainback EN7662865 - v07 - 20102017
6.4.5 Checksafterfilling
If the theoretical volume of the installation is less than the capacity of the tank, proceed to start up the system.
Related informationChecking the volume, page 30.
If the theoretical volume of the installation is greater than the capacity of the tank, contact the technical department.Once the installation has been filled:1 Configure solar control relay 1 in manual mode and set it to 100%.
Related informationSolar control, page 37.
2 Check that the collector field fills correctly.3 Switch off the pump.4 Check that the installation has drained correctly.
WarningHandle with care: risk of high temperatures!
5 Configure solar control relay 1 in automatic mode.
Related informationSolar control, page 37.
WarningBefore configuring the control in automatic mode, ensure that the installation is full and ready to use, to avoid heating the Drainback vessel when empty.
37
7 Solar control
Solar DrainbackEN7662865 - v07 - 20102017
7 Solar control
7.1 Description of the Basic solar control
7.1.1 Keys
The controller is operated using the 3 keys under the screen:1 Forwards (+)2 Back (-)3 SET (selection/adjustment mode)Key 1 is used to move forwards in the menu or to increase values. Key 2 is used to move backwards in the menu or to reduce values. Key 3 is used to select channels and confirm settings.During normal operation, the screen only shows the display channels.To switch between channels, press keys 1 and 2.To access the setting channels, press key 1 until you reach the last display channel; then press and hold key 1 for approximately 2 seconds. When the screen shows a setting channel, the "SET" symbol will appear on the right-hand side.To select a setting channel, press key 3. "SET" begins to flash. Set the desired value using keys 1 and 2. Briefly press key 3. "SET" will appear permanently, the value set is stored in the memory.
7.1.2 System monitoring screen
The system monitoring screen comprises 3 parts:• Parameter indicator• Symbol bar• System diagram
7.1.3 Channel indicator
The channel indicator has two lines. The top line has 16 segments and mainly indicates the names of the parameters and submenus. The bottom line also has 16 segments and indicates values and parameters.
7.1.4 Symbol bar
The symbols in the symbol bar indicate the status.
Tab. 9 Meaning of symbols
Symbol permanently lit Flashing Operating status indication
Relay 1 active
The temperature of the accumulator has exceeded the maximum value
+ Accumulator safety disconnection activated
Collector safety disconnection activated
Collector cooling on
System cooling on
+ Accumulator cooling on
1
3
2
SET
ºCºK
SET
ºCºK
SET
ºCºK
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7 Solar control
Solar Drainback EN7662865 - v07 - 20102017
Tab. 9 Meaning of symbols
Symbol permanently lit Flashing Operating status indication
Accumulator cooling on standby with holiday mode enabled
+ Accumulator cooling on standby with holiday mode on
Minimum threshold collector on
Frost protection function enabled
Frost protection function on
+ Manual mode relay 1 ON
Manual mode relay 1 OFF
Sensor fault
7.1.5 System diagram
The system monitoring screen shows the selected system diagram. This includes various symbols which represent the system components. Depending on the operating status of the system, these symbols may be permanently lit, flashing or may not appear at all.
Tab. 10 Meaning of symbols in the system diagram
Symbol permanently lit Operating status indication
Collector with sensor
Pump
Temperature sensor
Accumulator with heat exchanger
• The pump symbol flashes when the corresponding relay is activated.• The sensor symbols flash once the corresponding display channels
are selected.• The sensor symbols flash quickly to indicate a fault on the
corresponding sensors.
7.2 Description of the Premium solar control
7.2.1 Keys and dial
The controller is operated using the 2 keys and the dial below the screen:1 Go back to previous menu2 Confirm/select3 Move up/down, increase/reduce values4 Manual mode5 Holiday modeBriefly press the manual mode key to access the manual mode menu.Holiday mode is accessed using the corresponding key. Press and hold this key for approximately 3 seconds to display the Holiday days parameter to enter the number of days' absence. When a value over 0 is entered, the mode set in the Holiday mode menu will be enabled and a countdown of the remaining days will be shown from 00:00. If this value is set to 0, the mode will be disabled.
SET
ºCºK
1
3
2
4
5
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7 Solar control
Solar DrainbackEN7662865 - v07 - 20102017
Control indicatorThe control features a control indicator with various colours in the centre of the dial. This indicates the following operating statuses:
Tab. 11 Premium solar control box operating statuses
Colour Permanently lit Flashing
Green All correct Manual mode: one relay at least in manual mode
Red Broken sensor cable, short-circuit on the cable of one sensor, monitor flow rate, overpressure, low pressure
Yellow Holiday mode ON Temperature difference too high, night-time circulation, SUPP/RET reversed, maximum temperature exceeded, updating, MicroSD card write error
40
8 Frequency inverter
Solar Drainback EN7662865 - v07 - 20102017
8 Frequency inverter
8.1 General
If the inverter has not been connected to the power supply for a prolonged period of time, the condensers must be restored to full power before the pump is started up.Power the inverter for one hour before starting up motor if the inverter has not been connected to the power supply for the following periods of time:• 12 months at a maximum storage temperature of 50 ºC• 24 months at a maximum storage temperature of 45 ºC• 36 months at a maximum storage temperature of 40 ºCEnsure that no start command can be run before an hour has elapsed.Check the date of manufacture if the inverter is being started up for the first time; if the date of manufacture is over 12 months, carry out the specific procedure.
CautionFailure to follow these instructions may damage the unit.
8.2 Description of the frequency inverter
8.2.1 Functions of the screen and keys
1 The ESC key is used to navigate through the menu (go back) and to set parameters (cancel).
2 The dial selector is used to navigate through the menu (up or down) and to set parameters (increase/decrease a value or an accessory option).
3 The ENT key (press the dial selector) is used to navigate through the menu (go forwards) and to set parameters (confirm).
4 REF mode selected (R e f - ).5 MON mode selected (M o n - ).6 CONF mode selected (C o n F ).7 Point used to show the parameter value (hundredths).8 Point used to show the parameter value (tens).9 The current display is the parameter value.10 The current display is the parameter unit.
88 8 8
ESC
RefValue
CAN Run CAN Err
UnitMon
Conf
56
1
4
3
7
10
8
2
9
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8 Frequency inverter
Solar DrainbackEN7662865 - v07 - 20102017
8.3 Auto adjustmentNoteIt is recommended to perform an auto adjustment procedure on the frequency inverter before starting up the unit.
1 To access the auto adjustment function, select the configuration (C o n F ) menu using the dial and confirm by pressing the ENT key.
8o8C 8n 8F
ESC
RefValue
CAN Run CAN Err
UnitMon
Conf
8u8F lL 8L
ESC
RefValue
CAN Run CAN Err
UnitMon
Conf
8i8S ln 8-
ESC
RefValue
CAN Run CAN Err
UnitMon
Conf
8t8 lu 8n
ESC
RefValue
CAN Run CAN Err
UnitMon
Conf
2 Select the FULL (F u L L ) submenu and confirm.
3 Select the Quick Start submenu (S i n - ) and confirm.
4 Select the Auto adjustment function (t u n ) and confirm.
5 Select the desired action and confirm.
Tab. 12 Auto adjustment function actions
Code Name Description
n o No action Auto adjustment not in progress.
Y E S Proceed with adjustment
Auto adjustment will proceed immediately if possible and the parameter will then change automatically to [No action] (n o ).If the inverter status does not enable an auto adjustment procedure to be performed immediately, the parameter changes to [No] (n o ) and the procedure must be repeated.
C L r Clear adjustment The motor parameters measured by the auto adjustment function are reset. The motor is controlled using the preset motor parameter values. [Auto adjustment status] (t u S ) set to [Not performed] (t A b ).
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8 Frequency inverter
Solar Drainback EN7662865 - v07 - 20102017
DangerAuto adjustment moves the pump to adjust the control loops.
During auto adjustment, the motor makes small movements: it is normal to hear the system make noises and oscillations. Auto adjustment should last for 1 to 2 seconds. Do not interrupt the process. Wait until the No Action (no) command appears on the screen.
NoteThe temperature of the motor may have a considerable effect on the result of the adjustment. Perform the adjustment procedure when the motor is off and cold.
To repeat the adjustment procedure, wait until the motor has switched off and cooled completely. First, set the Auto adjustment function (t u n ) to Clear Settings (C L r ) and then repeat the adjustment procedure (Y E S ).
8.4 Automatic mode
1 To access the automatic mode, select the configuration (C o n F ) menu using the dial and confirm by pressing the ENT key.
8o8C 8n 8F
ESC
RefValue
CAN Run CAN Err
UnitMon
Conf
8u8F lL 8L
ESC
RefValue
CAN Run CAN Err
UnitMon
Conf
8t8C 8L 8
ESC
RefValue
CAN Run CAN Err
UnitMon
Conf
8H8C 8C 8F
ESC
RefValue
CAN Run CAN Err
UnitMon
Conf
2 Select the FULL (F u L L ) submenu and confirm.
3 Select the CTL (C t L ) submenu and confirm.
4 Select the CHCF (C H C F ) submenu and confirm.
5 Select SiN (S i N ) and confirm.
43
9 Commissioning
Solar DrainbackEN7662865 - v07 - 20102017
9 Commissioning
9.1 General
The Drainback system is commissioned to enable it to be used for the first time after it has been out of service for a prolonged period or after any circumstance requiring a full reinstallation of the system.Commissioning the system enables the user to check the various settings and perform the necessary checks to start up the system in complete safety.
9.2 Checklist before commissioning
1 Check that the installation and the system are filled with water and have been bled correctly.
2 Check the tightness of the pipe connections.3 Bleed the system if necessary.4 Check the pressure shown on the primary loop pressure gauge. 5 Check the electrical connections.6 Check that there is an earth connection and the corresponding earth
connection circuit.
9.3 DB40S commissioning procedure
9.3.1 Procedure
Once the filling procedure is complete, the Drainback system must be connected to the power supply. Although the system is configured in the factory, if the control is reset, the first time that the control is switched on, the initialisation phase begins and the commissioning menu launches automatically.The commissioning menu guides the user through the key adjustment parameters required to operate the system.
■ Language
Select the language required.
■ Unit of temperature
Select the unit of temperature.
■ Maximum temperature of the accumulator
Adjust the desired maximum temperature of the accumulator.
NoteThe control includes a function to disconnect for safety reasons (which is not adjustable); this function disables the system when the temperature of the accumulator reaches 95 ºC.
ESIDIO SET
oCUNID SET
90A MX
oCSET
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9 Commissioning
Solar Drainback EN7662865 - v07 - 20102017
■ Pump control
Adjust the control mode of the pump without speed control, On/Off mode.
■ Minimum speed
Adjust the minimum speed of the pump (corresponding to 100%).
■ Maximum speed
Adjust the maximum speed of the pump (corresponding to 100%).
■ Finalising settings in the commissioning menu
After accessing the last channel in the commissioning menu, a safety request is displayed to confirm the settings made. To confirm the settings made, press the central key.
NoteAll the settings made during commissioning can be changed later if necessary, via the corresponding parameter. Additional functions and options can also be enabled and adjusted.
9.3.2 Basic factory setting values
Tab. 13 Basic solar control factory settings
Language ES
Unit of temperature ºC
R1 pump control On/Off
R1 minimum speed 100%
R1 maximum speed 100%
Maximum temperature of the accumulator 85 ºC
Collector safety temperature when OBD is enabled
120 ºC
Drainback option ON
OBD connection condition - period 60 s
OBD filling time 5.0 min
OBD stabilisation time 3.0 min
9.4 Commissioning procedure for the DB50, DB100 and DB150
9.4.1 Procedure
Once the filling procedure is complete, the Drainback system must be connected to the power supply. Although the system is configured in the factory, if the control is reset, the first time that the control is switched on, the initialisation phase begins (during which the central key flashes red) and the commissioning menu launches automatically.
OnOffBOM SET
100nMN SET
100nMX SET
OK SET
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9 Commissioning
Solar DrainbackEN7662865 - v07 - 20102017
The commissioning menu guides the user through the key adjustment parameters required to operate the system.The commissioning menu comprises the parameters described below. To make an adjustment, set the desired value using the central dial and press the right-hand key to confirm. The following parameter will appear on the screen.
■ Language
Select the language required.
■ Units
Select the unit of temperature.
Select the flow rate unit.
Select the unit of pressure.
Select the unit of energy.
■ Switching between summer and winter time
Enable or disable automatic switching between summer and winter time.
■ Time
Set the clock. Set the hours first, then the minutes.
■ Date
Set today's date. Set today's date by setting the year first, then the month and the day.
■ Select: system or diagram
Select to configure the controller with a system.
Unidad temp.o Fo C
Unidad caudalGalonesLitros
Unidad presion-
psibar
Unidad energia-
MBTUkWh
Verano/inviernoSiNo
Hora
16:25
IdiomaEnglishFrancaisSpanish
Fecha
??.??.2017
Sistema o esquemaEsquemaSistema
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9 Commissioning
Solar Drainback EN7662865 - v07 - 20102017
Select solar system 1. This solar system has the following configuration of sensors and relays:
Tab. 14 Sensors and relays in solar system 1
Sensors Relays; PWM/0-10 V
Collector 1 S1 Solar pump R1; PWMA
Lower accumulator S2 - -
■ Finalising settings in the commissioning menu
After selecting the system or entering the diagram number, a safety request is displayed. If the request is confirmed, the settings will be saved.To confirm the safety request, press the right-hand key.To go back into the commissioning menu, press the left-hand key. After confirming the safety request, the solar control is ready to use and the system should operate optimally with the factory settings.
NoteAll the settings made during commissioning can be changed later if necessary, via the corresponding parameter. Additional functions and options can also be enabled and adjusted.
9.4.2 Premium factory setting values
■ Solar
Tab. 15 Solar menu factory values
Basic settings
System 1
Collector
Collector min. temp. 10 ºC
Coll. safety temp. 130 ºC
Accumulator
ΔTon 6.0 K
ΔToff 4.0 K
ΔTnom 10.0 K
Ac. nom. temp. 90 ºC
Ac. max. temp. 90 ºC
Acc. Hys. 2.0 K
Increase 2.0 K
tmin 30 s
Minimum speed 40%
Accumulator On
Optional functions
Outdoor heat exchanger
Relay R2
Minimum speed 100%
Accumulator 1
Heat exchange sensor S3
Target temperature Off
ΔTon 6.0 K
Sistema
Guardar? SiEsquema
Guardar? Si
Sistema
1
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9 Commissioning
Solar DrainbackEN7662865 - v07 - 20102017
Tab. 15 Solar menu factory values
ΔToff 2.0 K
Extend 2.0 min
Function On
Cooling mode
Variant Collector
Collector maximum temperature 110 ºC
Accumulator 1 1
Accumulated cooling Off
Function On
Drainback
Filling time 2.0 min
Stabilisation 1.0 min
Initialisation 60 s
Booster Off
Draining implosion Off
Function On
■ Installation
Tab. 16 Installation menu factory values
Optional functions
Parallel relay
Relay R4
Reference relay R1
Extend Off
Delay Off
Speed Off
Invert Off
Function On
■ Energy meter
Tab. 17 Heating menu factory values
Energy meter
Supply sensor S3
Return sensor S6
Flow rate sensor On
Flow rate sensor S6
Fluid type Water
Function On
■ Inputs/Outputs
Tab. 19 Inputs/outputs menu factory values
Inputs
S1 PT1000
S2 PT1000
S3 PT1000
S4 PT1000
S5 N/A
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9 Commissioning
Solar Drainback EN7662865 - v07 - 20102017
Tab. 19 Inputs/outputs menu factory values
S6 Type VFS
Min 5 l/min
Max 100 l/min
S7 N/A
Outputs
R1 Signal 0-10 V
Output A
Type Solar
Min. speed 40%
Max. speed 100%
R2 Signal Standard
Min. speed 100%
Max. speed 100%
R3 Free
R4 Signal Standard
Tab. 20 Configured inputs/outputs
Solar
Collector S1
Lower accum. S2
Primary pump R1
Parallel relay R4
Heat exchange
Heat exchanger heat source S3
Heat exchanger consumption S2
Secondary pump R2
Energy meter
Energy meter supply S3
Energy meter return S6
Energy meter flow rate S6
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10 Maintenance
Solar DrainbackEN7662865 - v07 - 20102017
10 Maintenance
10.1 General
CautionMaintenance work must be carried out by a qualified professional.
CautionFailure to service the system will void the warranty.
CautionUse only genuine spare parts.
DangerDepending on the fluid temperature and the system pressure, if the vent screw is completely loosened hot liquid or gas can escape or even shoot out at high pressure. Beware of scaling.
DangerDepending on the operating conditions of the pump or installation (fluid temperature), the entire pump may be come very hot. Avoid touching the pipe owing to the risk of burning.
10.2 Standard servicing and maintenance operations
Have a service carried out at least once a year, or more often, depending on the regulations in force in your country:1 Check for leaks in the system.2 Check the hydraulic pressure.3 Check the fluid drained via the safety valve and fill the installation if
necessary.4 Check the status of the components.5 Check the maximum flow rate of the pump.6 Check the electrical connections.7 Check that the collectors are not too dusty. The collectors can be
cleaned with water, but they must be cold to avoid breaking the crystal.
8 Check if the collector installation shows any signs of damage or if there is any accumulated waste.
9 Check if the collector shows any signs of corrosion.10 Check if there is any damage or leaks in the accessories and
pipework, and check the condition of the insulation on these components.
50
11 Troubleshooting
Solar Drainback EN7662865 - v07 - 20102017
11 Troubleshooting
11.1 General malfunctions
Danger of electrocutionAlways disconnect the unit from the power supply before removing the cover from the solar control.
Tab. 21 Resolving general problems
Fault Possible cause Solution
The collector field installation does not heat the accumulator water
The surface of the collectors is dirty. Clean the surface of the solar collectors.
The surrounding flow rate is insufficient.
Check the surrounding flow rate and, if necessary, adjust it to the correct value using the flow regulator.
Incorrect sensor reading. Check that the sensors are correctly positioned. If faulty, replace.
Solar control malfunction. Check the parameter configuration of the control. If in doubt, contact the technical department.
No fluid circulating in the installation.
The installation has not been correctly sized.
The installation's pipe network does not meet the criteria in terms of the required dimensions and arrangement, therefore the fluid cannot circulate.
System electrical fault. Check the electrical supply at various points in the system.
The height of the installation exceeds the manometric head of the pump.
Check the reading on the pressure gauge and the flow regulator when the pump is running.
Air found in the pump intake.Bleed the entire system. Repeat the installation filling process if necessary.
Flow rate too high. Adjust the flow rate to the desired value using the flow regulator.
The solar pump does not run.
The pump is blocked. Disassemble the pump and check that there is no obstruction. If the error persists, contact the technical department.
The solar pump is not powered. Check the pump connections. Check the electrical supply to connection R1.
The solar control is incorrectly configured. Check the configuration of the solar control.
The pump starts and stops intermittently.
The temperature difference in the control is too small. Change the ΔTon and ΔTon settings to the correct values.
Collector sensor fitted in the wrong place. Position the temperature sensor at the hottest output of the collector.
The pump starts running after a long delay.
ΔTon connection temperature difference too great. Change the ΔTon and ΔTon settings to the correct values.
Collector sensor incorrectly positioned.
When the sun is shining, briefly adjust the solar pump in manual mode, and check if the temperature of the collectors increases.
The accumulator cools down overnight.
The solar circuit pump works overnight.
Check the operating status of the pump.
Check the configuration of the solar control.
The solar pump does not run although the temperature of the collectors is greater than the temperature of the accumulator.
The temperature difference in the control is too great. Change the ΔTon and ΔTon settings to the correct values.
The solar control is incorrectly configured.
Check the configuration of the solar control.
Check the position of the sensors.
The fluid does not drain out of the installation correctly.
The installation has not been correctly designed. The minimum gradients for drainage have not been respected.
The installation's pipe network does not meet the criteria in terms of the required dimensions and arrangement, therefore the fluid cannot drain. Make sure that there are no siphons in the installation.
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11 Troubleshooting
Solar DrainbackEN7662865 - v07 - 20102017
11.2 DB40S malfunctions
Danger of electrocutionAlways disconnect the unit from the power supply before removing the cover from the solar control.
Tab. 22 Resolving DB40S problems
Fault Possible cause Solution
symbol lit + symbol flashingBroken cable. Check the cable and replace it.
Short circuit. Check the cable and replace it.
Screen off. Power supply fault. Check the power supply to the unit. Replace the damaged cable.
11.3 DB50, DB100 and DB150 malfunctions
Danger of electrocutionAlways disconnect the unit from the power supply before removing the cover from the solar control box.
Tab. 23 Resolving DB50, DB100 and DB150 problems
Fault Possible cause Solution
The solar control flashes red.Sensor fault. Check the sensor and replace it.
Broken cable or short circuit. Check the cable and replace it.
Screen off. Power supply fault. Check the power supply to the unit. Replace the damaged cable.
The temperature difference between the accumulator and the collector increases significantly when the system is on.
There is scale in the heat exchanger. Clean the component and remove any scale. If it is broken, replace it.
The heat exchanger is blocked. Clean the heat exchanger. If it is broken, replace it.
Tab. 24 Resolving Premium solar control problems
Error code Display Monitoring function Reason
0001 Sensor error! Broken cable Broken sensor cable
0002 Sensor error! Sensor cable short circuit Short circuit on the sensor cable
0011 ΔT too high! ΔT too high Tcoll. 50 K > Tacc loaded
0021 Night-time circulation! Night-time circulation Between 23:00 and 05:00 Tcoll. > 40 ºC
0031 SUPP/RET reversed! Supply/return reversed Collector temp. does not increase after activation
0041 Monit. flow rate! Monitor flow rate Flow rate not detected by the sensor
0051 Overpressure! Monitor overpressure Flow rate not detected by the sensor
0052 Low pressure! Monitor low pressure The system pressure is below the minimum threshold value
0061 Memory fault! Settings cannot be changed or saved -
0071 Timer fault! Timer functions not available (e.g. night-time correction) -
0081 Acc. max. temp.! Maximum accumulator temperature The maximum accumulator temperature has been exceeded
0091 Reset Reset counter (not adjustable) Number of resets since start-up
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12 Decommissioning
Solar Drainback EN7662865 - v07 - 20102017
12 Decommissioning
12.1 Decommissioning procedure
If the Drainback system must be decommissioned, either temporarily or permanently, proceed as follows:1 Switch off the power supply to the system.2 Wait until the fluid has drained out of the installation and is stored in
the Drainback system.3 Close all the valves on the system.
NoteThe installation fluid will remain stored in the system.
12.2 Recommissioning procedure
WarningOnly qualified professionals are authorised to work on the Drainback system and the installation.
To recommission the Drainback system, proceed as follows:1 Reconnect the system to the power supply.2 Check the level of fluid stored in the system.
NoteIf this system is not completely full, fill the installation.
Related informationFilling the installation, page 34.
3 Commission the system.
Related informationCommissioning, page 43.
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13 Disposal
Solar DrainbackEN7662865 - v07 - 20102017
13 Disposal
13.1 Disposal and recycling
WarningRemoval and disposal of the Drainback system must be carried out by a qualified installer in accordance with local and national regulations.
Disassemble the system as follows:1 Switch off the power supply to the system.2 Wait until the fluid has drained out of the installation and is stored in
the Drainback system.3 Close all the valves on the system.4 Drain the Drainback system via the valve used for filling/draining.
WarningHandle with care: the fluid inside can be very hot.
NoteThe fluid inside is a mix of glycol and water; do not pour it down the drain – recycle it appropriately.
5 Disconnect all the inlets and outlets on the system.6 Recycle or dispose of the system.
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12 Decommissioning
Solar Drainback EN7662865 - v07 - 20102017
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7662865-07
EN7662865 - v07 - 20102017