Duratech Dura Pro 12 Service manual

INVERTER HEATPUMP
FOR SWIMMING POOLS
Installation & Instruction Manual
402-0071-161212
heat pumps

2
Table of contents
1. Preface
2. Specications
2.1 Performance Data
2.2 Dimensions
3. Installation and Connection
3.1 Heat Pump Location
3.2 How Close to Your Pool?
3.3 Installation illustration
3.4 Installation of a check valve
3.5 Electrical Wiring
3.6 Initial Start-up of the Unit
3.7 Condensation
4. Operation and Use
4.1 Display interface introduction
4.2 Button functions
4.3 Error codes
4.4 Error code list
5. Wiring diagrams
5.1 Wire control interface diagram and denition
5.2 Controller interface diagram and denition
6. Maintenance and Inspection
7.Appendix
7.1 Caution & Warning
7.2 Warranty
3
4
6
8
8
9
9
10
10
11
12
13
17
18
20
20
23
24
25

3
1. Preface
In order to provide our customers with quality, reliability and versatility, this product has
been made to strict production standards. This manual includes all the necessary
information about installation, debugging, discharging and maintenance. Please read this
manual carefully before you open or maintain the unit. The manufacture of this product will
not be held responsible if someone is injured or the unit is damaged, as a result of
improper installation, debugging, or unnecessary maintenance. It is vital that the
instructions within this manual are adhered to at all times. The unit must be installed by
qualied personnel.
The unit can only be repaired by qualied personnel or an authorized dealer.
Maintenance and operation must be carried out according to the recommended time and
frequency, as stated in this manual.
Use genuine standard spare parts only.
Failure to comply with these recommendations will invalidate the warranty.
Swimming Pool Heat Pump Unit heats the swimming pool water and keeps the temperature
constant.
Our heat pump has following characteristics:
• Durable
The heat exchanger is made of PVC & Titanium tube which can withstand prolonged
exposure to swimming pool water.
• Installation exibility
The unit can be installed outdoors or indoors.
• Quiet operation
The unit comprises an efcient rotary/ scroll compressor and a low-noise fan motor,
which guarantees its quiet operation.
• Advanced controlling
The unit includes micro-computer controlling, allowing all operation parameters to be
set. Operation status can be displayed on the LCD wire controller. Remote controller
can be chosen as future option.

4
2. Specications
2.1 Performance data
UNIT Dura Pro 12 Dura Pro 17 Dura Pro 21
Max Pool volume* m330 - 60 40 - 75 50-95
Advised Pool volume m340 50 65
Operating air temperature °C -15 ~ 43
Air 27°C / Water 26°C / Humidity 80%
Heating Capacity kW 2,85 - 12 3,77 - 17 4,6 - 19,5
Btu 9690 - 40800 12818 - 57800 15640 - 66300
Consumed power kW 0,21 - 2,12 0,3 - 3,02 0,37 - 3,94
COP 13,57 - 5,66 12,57 - 5,63 12,43 - 4,95
Air 15°C / Water 26°C / Humidity 70%
Heating Capacity kW 2,25 - 9,7 2,92 - 12,4 3,84 - 15,4
Btu 7650 - 32980 9928 - 42160 13056 - 52360
Consumed power kW 0,32 - 2,08 0,44 - 2,86 0,6 - 3,81
COP 7,03 - 4,66 6,64 - 4,34 6,4 - 4,04
Air 10°C / Water 26°C / Humidity 64%
Heating Capacity kW 1,88 - 8 2,5 - 10,7 3,38 - 14,4
Btu 6329 - 27200 8500 - 36380 11492 - 48960
Consumed power kW 0,33 - 1,95 0,45 - 2,64 0,62 - 3,62
COP 5,7 - 4,1 5,56 - 4,05 5,45 - 3,98
Power supply 230V / 50Hz
Nominal Heating Capacity kW 7,1 9,7 11,5
Nominal power input kW 0,99 1,38 1,72
Max power input kW 2,5 3,2 4,88
Nominal Running current A 4,3 6 7,5
Current range A 0,9 - 9,2 1,3 - 13,1 1,6 - 17,1
Max Current A 13 13,96 21,17
Compressor quantity 1 1 1
Compressor type Rotary Rotary Rotary
Refrigerant R410A
Fan quantity 1 1 1
Fan power input W 100 120 120
Fan rotary speed RPM 600 - 800 600 - 750 600 - 900
Fan direction Horizontal Horizontal Horizontal
Noise dB(A) 42 44 45
Water connection mm 50 50 50
Nominal water ow m3/h 4,2 5,3 6,6
Water pressure drop (max) kPa 4,5 5 6
Unit net dimensions (L*W*H) mm 1003*396*767 1117*430*868 1117*430*868
Unit shipping dimensions (L*W*H) mm 1130*460*790 1210*510*880 1210*510*880
Net weight kg 59 77 82
Shipping weight kg 69 89 95
* Advised pool volume for an entirely insulated pool, with cover, free from wind and exposed to the sun
In case the pool volume is close to the maximum value, the inverter heatpump will nearly always run at full power
** Advised pool volume for efcient heating

5
UNIT Dura Pro 25 Dura Pro 28T
Max Pool volume* m365 - 120 90 - 169
Advised Pool volume m375
Operating air temperature °C -15 ~ 43
Air 27°C / Water 26°C / Humidity 80%
Heating Capacity kW 5,7 - 24,2 6,7 - 28,3
Btu 19380 - 82280 22780 - 96220
Consumed power kW 0,46 - 4,8 0,54 - 5,57
COP 12,39 - 5,04 12,41 - 5,08
Air 15°C / Water 26°C / Humidity 70%
Heating Capacity kW 4,68 - 19,9 5,46 - 23,3
Btu 15912 - 67660 18564 - 79220
Consumed power kW 0,72 - 4,74 0,83 - 5,49
COP 6,5 - 4,2 6,58 - 4,24
Air 10°C / Water 26°C / Humidity 64%
Heating Capacity kW 4,2 - 17,8 4,9 - 20,8
Btu 14280 - 60520 16660 - 70720
Consumed power kW 0,75 - 4,4 0,87 - 5,1
COP 5,6 - 4,05 5,63 - 4,08
Power supply 230V / 50Hz 380-400V (3Phase)
Nominal Heating Capacity kW 14,3 16,6
Nominal power input kW 2,1 2,46
Max power input kW 5,52 6,72
Nominal Running current A 9,1 4,6
Current range A 2 - 20,9 1,13 - 9,29
Max Current A 24,09 11,2
Compressor quantity 1 1
Compressor type Rotary Rotary
Refrigerant R410A
Fan quantity 2 2
Fan power input W 200 200
Fan rotary speed RPM 400 - 800 400 - 800
Fan direction Horizontal Horizontal
Noise dB(A) 46 48
Water connection mm 50 50
Nominal water ow m3/h 8,6 10
Water pressure drop (max) kPa 11 15
Unit net dimensions (L*W*H) mm 1163*447*1275 1163*447*1275
Unit shipping dimensions (L*W*H) mm 1210*495*1300 1210*495*1300
Net weight kg 110 110
Shipping weight kg 125 125
* Advised pool volume for an entirely insulated pool, with cover, free from wind and exposed to the sun
In case the pool volume is close to the maximum value, the inverter heatpump will nearly always run at full power
** Advised pool volume for efcient heating

6
A
Dura Pro 17 Dura Pro 21
400 470
L
H
W
1003 mm
767 mm
410 mm
L
H
W
1117 mm
868 mm
447 mm
2.2 Dimensions
DURA Pro 12
DURA Pro 17 / 21

7
L
H
W
1163 mm
1275 mm
470 mm
DURA Pro 25 / 28T

8
3. Installation and Connection
3.1 Heat Pump Location
The unit will perform well in any outdoor location provided that the following three factors are
presented:
1. Fresh Air - 2. Electricity - 3. Pool lter piping
The unit may be installed virtually anywhere outdoors. For indoor pools please consult the
supplier. Unlike a gas heater, it has no draft or pilot light problem in a windy area.
DO NOT place the unit in an enclosed area with a limited air volume, where the units
discharge air will be re-circulated.
DO NOT place the unit to shrubs which can block air inlet. These locations deny the unit of a
continuous source of fresh air which reduces its efciency and may prevent adequate heat
delivery.
3.2 How Close To Your Pool?
Normally, the pool heat pump is installed within 7.5 meters of the pool. The longer the distance
from the pool, the greater the heat loss from the piping. For the most part ,the piping is buried.
Therefore, the heat loss is minimal for runs of up to15 meters(15 meters to and from the pump =
30 meters total), unless the ground is wet or the water table is high. A very rough estimate of heat
loss per 30 meters is 0.6 kW-hour,(2000BTU) for every 5°C difference in temperature between the
pool water and the ground surrounding the pipe, which translates to about 3% to 5% increase in
run time.

9
3.3 Installation illustration
Remarks:
The factory only provides the heat pump. Other parts, including a contingent by-pass are to be
provided by the user or installer.
Attention:
Please take the following steps when installing the heat pump:
1. Each addition of chemicals has to be performed through the conduits located AFTER the heat pump.
2. Install a by-pass for easy maintenance
3. Always place the heat pump on a solid base and use the supplied silent blocks in order to avoid
vibrations and noise.
4. Always keep the heat pump in upright position. If the unit has been tilted, you should wait for at least
24 hours before turning it on.
3.4 Installation of a check valve
When using automatic chlorine and pH dosage systems, it is of uttermost importance to protect
the heat pump from high concentrations of these chemicals that could corrode the heat exchanger
Therefore, such systems should add the chemicals in the conduits located DOWNSTREAM of the
heat pump and it is recommended to install a check-valve in order to prevent backow when there
is no water circulation.
Damage to the heat pump caused by disregarding any of these recommendations will invalidate
the warranty.

10
3.5 Electrical Wiring
Important - Although the heat pump is electrically isolated from the rest of the unit, this
only prevents the passage of electricity to or from the pool water. Grounding the unit is still
required to protect yourself from short circuits inside the unit. Make for adequate ground
connection.
Check if the electrical mains voltage corresponds with the operating voltage of the heat pump
prior to hooking up the unit.
It is recommended to use a separate fuse (C-curve) as well as adequate wiring (see table below).
Connect the electrical wires with the terminal block labelled ‘TO POWER SUPPLY’.
Next to this connection, there is a second terminal block labelled ‘TO PUMP’, to which the lter
pump (max. 5A/240V) or an electrical relay for a ltration pump can be connected. This connec-
tion makes it possible to control lter pump operation with the heat pump.
3.6 Initial startup of the Unit
NOTE- In order for the unit to heat the pool or spa, the lter pump must be running to
circulate water through the heat exchanger.
Start up Procedure - After installation is completed, you should follow these steps:
1. Turn on your lter pump. Check for water leaks and verify ow to and from the pool.
2. Turn on the electrical power supply to the heatpump, then press the key ON/OFF of wire con-
troller, It should start in several seconds.
3. After running a few minutes make sure the air leaving the fan opening of the unit is cooler
(between 5-10°C)
4. With the unit operating turn the lter pump off. The unit should also turn off automatically,
5. Allow the unit and pool pump to run 24 hours per day until desired pool water temperature is
reached. When the desired pool water temperature reaches the setting, the unit just shuts off.
The unit will now automatically restart (as long as your lter pump is running) when the pool tem-
perature drops more than 2°C below set temperature.
Time Delay- The unit is equipped with a 3 minute built-in solid state restart delay included to
protect control circuit components and to eliminate restart cycling and contactor chatter.
This time delay will automatically restart the unit approximately 3 minutes after each control
circuit interruption. Even a brief power interruption will activate the solid state 3 minute
restart delay and prevent the unit from starting until the 5 minute countdown is completed.
Power interruptions during the delay period will have no effect on the 3 minute countdown.
Model Voltage (V) Fuse (C-curve) Max current (A) Cable section*
DURA Pro 12 220-240V 20 13 2,5 mm2
DURA Pro 17 220-240V 20 13,96 2,5 mm2
DURA Pro 21 220-240V 32 21,17 4 mm2
DURA Pro 25 220-240V 32 24,09 4 mm2
DURA Pro 28T 3x 400V 32 (3 phase) 11,2 2,5 mm2
* For a maximum cable length of 50m