Duratech ECO+ Series Quick guide

Revision 1.0
12.11.2013
HEAT PUMP FOR SWIMMING POOL
Installation and Instruction Manual

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ECO+ series swimming pool heat pumps
Table of contents
Table of contents ................................................................................................................................ 2
1. Preface ............................................................................................................................................. 3
2. Specifications ................................................................................................................................. 4
2.1 Performance data .................................................................................................................................. 4
3. Installation and connections ..................................................................................................... 5
3.1 Remarks ................................................................................................................................................... 5
3.2 Heat pump location .............................................................................................................................. 5
3.3 How close to the pool? ......................................................................................................................... 5
3.4 Typical configuration .......................................................................................................................... 6
3.5 Water connections ................................................................................................................................ 6
3.6 Electrical connection ............................................................................................................................ 7
3.7 Initial startup of the unit ..................................................................................................................... 7
3.8 Condensation .......................................................................................................................................... 8
4. Guidelines ........................................................................................................................................ 9
4.1 Water chemistry .................................................................................................................................... 9
4.2 Winterizing ............................................................................................................................................. 9
4.3 Spring startup ......................................................................................................................................... 9
4.4 Control ................................................................................................................................................... 10
5. Usage and operation ................................................................................................................. 11
5.1 The display ........................................................................................................................................... 11
5.2 Setting of the wanted temperature .............................................................................................. 11
5.3 The flow bar ......................................................................................................................................... 11
6. Maintenance and inspection ................................................................................................. 12
6.1 Maintenance ........................................................................................................................................ 12
6.2 Trouble shooting guide ..................................................................................................................... 12
6.3 Error messages ................................................................................................................................... 13
7. Warranty....................................................................................................................................... 14

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ECO+ series swimming pool heat pumps
1. Preface
In order to provide our customers with quality, reliability and versatility, this product has been made to
strict producing standards. This manual includes all necessary information about installation,
debugging, discharging and maintenance. Please read this manual carefully before you open or
maintain the unit. Failure to comply with these recommendations will void warranty.
The manufacturer 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.
The Swimming Pool Heat Pump Unit heats the swimming pool water and keeps the temperature
constant.
Our ECO+ heat pumps have the following characteristics:
1. Durable
The heating exchanger is made of PVC & Titanium tube, which can withstand prolonged
exposure to swimming pool water.
2. Flexible installation
All our heat pumps are fully tested and ready for use when they leave our factory.
Simply connect swimming pool water to the heat pump en insert the electrical plug into a wall
socket.
3. Quiet operation
The unit comprises an efficient rotary compressor and a low-noise fan motor, which
guarantees its quiet operation.
4. Easy operation
The electronic control panel permits easy setting of the desired temperature. All relevant
informationregardingtheheatpump’soperationcanbereadonthisdisplay.

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ECO+ series swimming pool heat pumps
2. Specifications
2.1 Performance data
Model
ECO+4
ECO+6
ECO+9
ECO+14
Heating capacity
kW
3,9
5,7
8,6
14,1
Power input
kW
0,8
1,05
1,55
2,65
Maximum pool volume *
m3
12
20
30
45
Running current
A
3,5
4,6
6,5
11,7
COP **
4,9
5,2
5,4
5,3
Power supply
V/Ph/HZ
220-
240/1/50
220-
240/1/50
220-
240/1/50
220-
240/1/50
Controller
Digital with built-in diagnostics
Heat exchanger
Titanium
Compressor quantity
1
1
1
1
Type compressor
rotary
rotary
rotary
rotary
Refrigerant
R410A
R410A
R410A
R410A
Refrigerant quantity
kg
0,65
0,80
0,97
1,1
Fan quantity
1
1
1
1
Fan input power
W
70
70
80
80
Fan speed
rpm
950
950
1200
1200
Fan direction
vertical
vertikaal
vertikaal
vertikaal
Noise at 2m
dB(A)
53
54
57
58
Water connection
Inch
1,5
1,5
1,5
1,5
Nominal water flow
m3/h
3 –12
4 –12
5 –12
5 –12
Water pressure drop (max.)
kPa
11
13
15
15
Protection
IP x4
RCD protection
mA
10
10
10
10
Dimensions
L/W/H(mm)
458/472/530
458/472/530
458/472/750
458/472/750
Unit shipping dimensions
L/W/H(mm)
500/510/580
500/510/580
500/510/800
500/510/800
Net/shipping weight
kg
27/28
29/30
37/39
43/45
* Maximum pool volume when completely insulated, with pool cover, out of the wind and in the sun.
** Measurement conditions: ambient temperature 24°C, water temperature 27°C, relative humidity 70%
2.2 Dimensions
A
B
C
D
ECO+4
530mm
458mm
472mm
ECO+6
530mm
458mm
472mm
ECO+9
750mm
458mm
472mm
ECO+14
750mm
458mm
472mm

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ECO+ series swimming pool heat pumps
3. Installation and connections
3.1 Remarks
The box contains the heat pump, 2 water connections and this manual. Other parts, including a by-pass
must be provided by the user/installer.
Attention:
Please follow these steps when installing the heat pump:
1. All feeding of chemicals to the pool water has to be done downstream of the heat pump.
2. Always keep the unit straight up. If the unit has been tilted or put on his side, allow 24h
before starting the unit.
3. The unit must always be installed outdoors.
3.2 Heat pump location
The unit will always perform very well, provided the following elements are present:
1. Fresh air - 2. Electricity - 3. Swimming pool filter pipes
The unit may be installed virtually anywhere outdoors when minimal distance to other objects is
respected.
3.3 How close to the pool?
Install the heat pump as close to the swimming pool as possible to minimize the loss of heat through
the piping but stay minimum 2 meters away from the pool. Put it on a solid base. Keep the length of
the piping as short as possible to limit heat loss. Insulating the piping will be useful.
Attention:
Do not install the heat pump in a closed room to prevent the intake of the cold exhaust air. Do not
put it close to garden plants; they could block the intake of fresh air.
Blocking the air intake will cause insufficient operation and will result in lower production of heat.
Please check the drawing on paragraph 3.4 for minimum distances.

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ECO+ series swimming pool heat pumps
3.4 Typical configuration
Remark –This setup is just an example
3.5 Water connections
The piping to and from the heat pump need to have a 50mm outer diameter and need to be glued to
water connections that came with the heat pump.
These pipes can be hard PVC or flexible. Always install piping intended for swimming pool use and
use the correct glue to put them together.

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ECO+ series swimming pool heat pumps
3.6 Electrical connection
Important –Although the heat pump is electrically isolated from the swimming pool installation,
this only prohibits electrical current to or from the swimming pool water. Grounding the heat
pump is required to protect you against electrical shock caused by an eventual short circuit
inside the unit. Make sure you have a solid grounding.
Always check if the voltage from the network corresponds with the operating voltage of the unit.
The heat pump must only operate together with the filter pump. Both should always be powered
together. Therefore, connect them to the same circuit breaker. The heat pump will get damaged
when operated without water flow and will void warranty.
Please adhere to the following guidelines for the rest of the electrical installation:
Model
Power supply
Circuit
breaker
Running current
Cable section for
15m of cable
Cable section for
50m of cable
ECO+4
220-240V
16A
3,5A
2,5mm2
2,5mm2
ECO+6
220-240V
16A
4,6A
2,5mm2
4mm2
ECO+9
220-240V
20A
6,5A
2,5mm2
4mm2
ECO+14
220-240V
20A
11,7A
2,5mm2
6mm2
Values in this table are only guidelines. Check your local regulations.
The heat pump is supplied with a connection cable and can be plugged directly into an outlet.
The cable has standard a 10mA RCD.
ATTENTION: test the RCD before use as follows:
1. Plug the RCD into a fixed socket
2.Pressthe“RESET”button.Theindicatorshouldbe“ON”.
3.Pressthe“TEST”button.Theindicatorshouldbe“OFF”.
4.Pressthe“RESET”buttonagaintostartusingtheheatpump.
YoushouldalwaysswitchofftheheatpumpimmediatelywhentheRCDindicatoristurned“OFF”.
Be extremely careful when pressing“RESET”afterafailurebecausetheremightstillbeaproblem.

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ECO+ series swimming pool heat pumps
3.7 Initial startup of the unit
The following steps need to be taken at startup (after verification that all the connections are made
according the specifications:
1. Turn on the filter pump. Check for possible water leakage and water flow to and from the
swimming pool.
2. Put the power plug into the outlet and switch the heat pump ON. The unit will start after the time
delay (see further).
3. Verify after a few minutes that the air exhausted by the heat pump is becoming cooler.
4. Allow the unit and pool pump to run 24 hours per day until desired pool water temperature is
reached. When the set temperature is reached, the unit just shuts off. The unit will now
automatically restart when the pool temperature drops 1 degree Celsius below set temperature.
Several days will be needed to bring the temperature of the swimming pool water to its required value,
depending on the initial water temperature and the ambient temperature. A good pool cover and
insulation of the piping can shorten this period considerably.
Time delay –the unit is equipped with a 3-minute built-in delay 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 circuit interruption. Even a brief power interruption will activate
this delay and prevent the unit from starting until the 3-minute countdown is completed.
3.8 Condensation
By its operation of heating the swimming pool water, the air taken by the unit is cooled down and
water may condense on the fins of the evaporator. If the relative humidity is very high, this could be as
much as several liters an hour. Sometimes this condensation water is wrongly considered as swimming
pool water.

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ECO+ series swimming pool heat pumps
4. Guidelines
4.1 Water chemistry
Special care should be taken to keep the chemical balance of your swimming pool within following
limits:
Min.
Max.
pH
7,0
7,8
Free chlorine (mg/l)
0,5
1,5
TAC (mg/l)
TAC (°F)
80
10
150
30
Salt (g/l)
8
IMPORTANT: failure to keep the swimming pool water between above limits will void the
warranty
NOTE: when the concentration of one or more products mentioned above becomes too high,
irrevocable damage to your heat pump may occur. Make sure that you always install water
treatment equipment after the heat pump.
When an automatic chemical feeder is installed in the plumbing, it must be installed downstream
of the heat pump.
A check valve must be installed between the heat pump and the chemical feeder to prevent back
siphoning of chemically saturated water into the heat pump where it will damage the
components.
4.2 Winterizing
Caution: failure to winterize could cause damage to the heat pump and will void warranty
Although our ECO+ heat pumps are protected against freezing, it is good practice to drain the
complete installation. Perform the following actions to completely drain the heat pump:
1. Turn off the electrical power to the heat pump at the main breaker panel.
2. Shut off the water supply to the heat pump.
3. Disconnect the water inlet and outlet and let the water drain from the heat pump.
4. Re-connect the water inlet and outlet loosely to prevent debris entering the connections.
4.3 Spring startup
If your heat pump has been winterized, perform the following steps when starting the system in the
spring:
1. Inspect the system for any debris or structural problems.
2. Connect the water inlet and outlet unions firmly.
3. Turn on the filter pump to supply water to the heat pump.
4. Restore electrical power to the heat pump and switch it ON.

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ECO+ series swimming pool heat pumps
4.4 Control
The ECO+ heat pumps are designed and constructed to provide long performance life when installed
and operated properly under normal conditions. Periodic inspections are important to keep your heat
pump running safely and efficiently through the years.
The following basic guidelines are suggested for your inspection:
1. Make sure the front of the unit is accessible for future service.
2. Keep the surrounding areas of the heat pump clear of all debris.
3. Keep all plants and shrubs trimmed and away from the heat pump.
4. Keep lawn sprinkler heads from spraying on the heat pump to prevent corrosion and damage.
Use a deflector if needed.
5. If the unit is installed under a very sharp roof pitch or under a roof without a gutter, a gutter or
diverter should be fitted to prevent excessive water from pouring down onto the unit.
6. Do not use the heat pump if any part has been under water. Immediately call a qualified
professional technician to inspect the heat pump and replace any part of the control system,
which has been submerged.
The heat pump will produce condensation (water) while in operation. The heat pump base is designed
to allow the condensation to exit through the bottom drain port. The condensation will increase as the
outdoor air humidity level increases. Visually inspect and clear the bottom drain port of any debris that
could clog the port.
The WG heat pump can easily produce 10 to 20 liters of condensation. Stop the unit in case you feel
that more water is being generated and wait for one hour to check for leakage inside.
NOTE: A quick way to verify that the water running trough the drain is condensation water is to
shut off the unit and keep the pool pump running. If the water stops running out of the base pan,
it is condensation water. AN EVEN QUICKER WAY - TEST THE DRAIN WATER FOR
CHLORINE - if there is no chlorine present, then it's condensation.
Make sure that the air intake and exhaust are free from any restriction. Avoid that the cold exhaust air
gets sucked back into the unit.