Waterstage WS G140DC6 Series User manual




To be saved for
future consultation
Document n° 1533-0 ~ 05/06/2012
    

Werftstrasse 20
40549 Düsseldorf - Germany
Subject to modications without notice.
Non contractual document.

Air to Water Heat Pump










Contents
                              
Package . . . . . . . . . . . . . . . . . . . . . . . . 4
Denitions . . . . . . . . . . . . . . . . . . . . . . . 4
Specications . . . . . . . . . . . . . . . . . . . . . 5
Description. . . . . . . . . . . . . . . . . . . . . . . 9
Operating principle . . . . . . . . . . . . . . . . . 10
                                    
Regulation installation and maintenance conditions . . 12
Unpacking and reservations . . . . . . . . . . . . . 12
Receipt . . . . . . . . . . . . . . . . . . . . 12
Handling . . . . . . . . . . . . . . . . . . . 12
Accessories provided . . . . . . . . . . . . . 12
Installation position . . . . . . . . . . . . . . . . . 12
Installation of the outdoor unit . . . . . . . . . . . . 12
Installation precautions . . . . . . . . . . . . 12
Outdoor unit positioning . . . . . . . . . . . 14
Condensate drain hose . . . . . . . . . . . . 14
Installing the hydraulic unit . . . . . . . . . . . . . 15
Installation precautions . . . . . . . . . . . . 15
Positioning the hydraulic unit . . . . . . . . . 15
Refrigeration connections . . . . . . . . . . . . . . 16
Rules and precautions . . . . . . . . . . . . 16
Refrigeration connections. . . . . . . . . . . 16
Accessing the hydraulic module’s
refrigerant connections . . . . . . . . . . . . 17
Creating the arings . . . . . . . . . . . . . 17
Shaping the refrigeration pipes . . . . . . . . 17
Connecting the ared connections . . . . . . 18
Filling the installation with gas . . . . . . . . . . . . 19
Example of commissioning procedure . . . . 19
Sealing test . . . . . . . . . . . . . . . . . . 19
Additional charge . . . . . . . . . . . . . . . 20
Pump down operation (Refrigerant collecting
operation) single phase outdoor unit . . . . . 20
Pump down operation (Refrigerant collecting
operation) 3-phase outdoor unit . . . . . . . 21
Hydraulic connecting . . . . . . . . . . . . . . . . 22
General . . . . . . . . . . . . . . . . . . . . 22
Rinsing out the installation . . . . . . . . . . 22
Filling and purging the installation . . . . . . 22
Connecting the Fan convector circuit . . . . . 22
Heating circulation pump speed settings . . . . . . 23
Electrical connections . . . . . . . . . . . . . . . . 24
Characteristic of the electrical supply . . . . . 24
General remarks on electrical connections . . . 24
Overview of all the electrical connections . . 25
Cable section and protection rating . . . . . . 25
Electrical connections
on the single phase outdoor unit side. . . . . 26
Electrical connections
on the 3- phase outdoor unit side . . . . . . . 27
Electrical connections
on the hydraulic unit side . . . . . . . . . . . 28
Outdoor sensor . . . . . . . . . . . . . . . . . . . 31
Room thermostat and/or remote control . . . . . . . 31
Installing a room sensor . . . . . . . . . . . 31
Installing a remote control . . . . . . . . . . 31
Commissioning . . . . . . . . . . . . . . . . . . . 31
Conguring room thermostat . . . . . . . . . . . . 32
Conguring remote control (wireless) . . . . . . . . 32
"

Installation and operating manual "1533 - EN"
Air to Water Heat Pump
- 2 -

                               
User interface, Remote control (option)
and Room thermostat (option) . . . . . . . . . . . . 34
Description of the display . . . . . . . . . . . . . . 36
Temperature control . . . . . . . . . . . . . . . . . 36
Set to . . . . . . . . . . . . . . . . . . . . . 36
Parametering the setting . . . . . . . . . . . . . . 38
General . . . . . . . . . . . . . . . . . . . . 38
Setting parameters . . . . . . . . . . . . . . 38
List of function lines
(settings, diagnosis, status) . . . . . . . . . . 38
                            
                           
                                 
Faults displayed on the hydraulic unit . . . . . . . . 56
Information display . . . . . . . . . . . . . . . . . 57
Faults displayed on the single phase outdoor unit . 58
Faults displayed on the 3-phase outdoor unit . . . . 59
                             
Start-up check-list . . . . . . . . . . . . . . . . . . 60
Before starting-up . . . . . . . . . . . . . . . 60
Starting-up . . . . . . . . . . . . . . . . . . 61
Settings sheet . . . . . . . . . . . . . . . . . . . . 62
Start-up data sheet . . . . . . . . . . . . . . . . . 63
                            
Installation and operating manual "1533 - EN" - 3 -
Air to Water Heat Pump

 
 
: Outdoor unit.
: Hydraulic unit and outdoor sensor.
 
- Split: The heat pump consists of two elements
(an outdoor unit for outdoor and a hydraulic unit for
inside the dwelling).
- Air/water: The surrounding air is the energy source.
This energy is transmitted to the water in the heating
circuit by the heat pump.
- Inverter: the fan and compressor speeds are modulated
according to the heating requirements. This technology
enables you to save on energy and operate on a single-
phase power supply, whatever the heat pump's output,
by avoiding heavy intensities on start-up.
- COP (coefcient of performance): this is the relationship
between the energy transmitted to the heating circuit
and electrical energy consumed.

This heat pump provides:
- Heating in winter,
- Control of two heating circuits*,
- Production of domestic hot water* (provided that
combined with a DHW tank).
- Installation with boiler connection* as a supplementary
heating for the coldest days.
- Cooling in summer* (for oor heating-cooling system
or fan-convectors).
- Heating the swimming pool*.
* : These options require the use of additional kits
(see para "Optional equipment").

• 2nd circuit kit (code UTW-KZS*D)
for connecting 2 heating circuits.
• Regulation extension kit (code UTW-KRE*D)
to manage a 2nd heating circuit, swimming pool etc...
• DHW kit (code UTW-KDW*D)
for connecting a DHW tank
(with built-in electrical back-ups).
• Boiler connection kit (code UTW-KBS*D)
for connecting a boiler to the heat pump.
• Room thermostat (code UTW-C55*A),
Wireless room thermostat (code UTW-C58*D)
for correcting the ambient temperature.
• Remote control (code UTW-C75*A),
Wireless remote control (code UTW-C78*D)
for correcting the ambient temperature and
programming the heat pump.
• Swimming pool kit (code UTW-KSP*D).
• Cooling kit (code UTW-KCL*D).
• High ow rate circulating pump kit (code UTW-PHF*D)
for the installation of 1 circuit oor heating
(with model > 13 kW).
Installation and operating manual "1533 - EN"
Air to Water Heat Pump
- 4 -

Heat Pump Outdoor Unit Hydraulic Unit
Model Reference Reference
Waterstage High Power 11 single phase WO*G112LCT WS*G140DC6
Waterstage High Power 14 single phase WO*G140LCT
Waterstage High Power 11 3-phase WO*K112LCT
WS*K160DC9Waterstage High Power 14 3-phase WO*K140LCT
Waterstage High Power 16 3-phase WO*K160LCT

 


   
(outdoor temperature / initial temperature)

+7 °C / +35 °C - Floor heating system kW 10,80 13,50 10,80 13,50 15,17
-7 °C / +35 °C - Floor heating system kW 10,80 12,00 10,80 13,00 13,50
+7 °C / +45 °C - Low temperature radiator kW 9,23 11,54 10,10 12,60 13,00
-7 °C / +45 °C - Low temperature radiator kW 9,16 11,45 10,02 12,50 13,00
+7 °C / +55 °C - Radiator kW 7,74 9,67 9,48 11,80 12,96
-7 °C / +55 °C - Radiator kW 7,51 9,25 9,20 10,60 11,90

+7 °C / +35 °C - Floor heating system kW 2,54 3,23 2,51 3,20 3,70
-7 °C / +35 °C - Floor heating system kW 4,32 5,08 4,28 5,18 5,40
+7 °C / +45 °C - Low temperature radiator kW 2,84 3,72 3,01 3,81 4,00
-7 °C / +45 °C - Low temperature radiator kW 4,58 5,92 4,63 6,00 6,37
+7 °C / +55 °C - Radiator kW 3,13 4,03 3,60 4,61 5,14
-7 °C / +55 °C - Radiator kW 4,56 5,65 5,08 6,04 6,88
 (+7 °C / + 35 °C)     

Supply voltage (50 HZ) V 230 400
Maximum current for appliance A 22 25 8,5 9,5 10,5
Nominal current A 11,4 14,2 3,7 4,8 5,5
Maximum current of the electrical back-ups A 26,1 13
Power of the electrical back-ups kW ajustable 3 or 6 kW (phase) 9 kW (3-phase)
Real power absorbed - by the fan W 2x100 2x104
- by the circulation pump W 70
Maximum power absorption by the outdoor unit W 5060 5750 5865 6555 7245

Maximum operating pressure bar 3
Hydraulic system ow rate (mini/maxi) 4°C<Δt<8°C (nominal conditions) l/h 1170 / 2340 1460 / 2920 1170 / 2340 1460 / 2920 1650 / 3290

Weight of outdoor unit kg 92 99
Noise level at 1 m  (hydraulic unit) dB 39
Sound power level according to EN 12102  (hydraulic unit) dB 46
Noise level at 5 m  (outdoor unit) dB 42 43 39 41 42
Sound power level according to EN 12102  (outdoor unit) dB 69 70 66 68 69
Weight of hydraulic unit (empty / full of water) kg 44 / 60
Water capacity of the hydraulic unit l 16

Hydraulic unit operation range °C 0 / +45
Outdoor temperature mini/maxi °C -25 / +35
Initial max. heating water temperature Floor heating system °C 45
Initial max. heating water temperature Low temperature radiator °C 60
Flow min. heating water temperature °C 8

Diameter of gas pipes inches 5/8
Diameter of liquid pipes inches 3/8
Factory charge of refrigerant R410A g 2500
Maximum operating pressure bar 42
Minimum length of pipes m 5
Maximum length of pipes m 15
Maximum length of pipes m 20
Maximum level difference m 15
 
 Sound pressure level in (x)m of the device, 1,5m of the ground, the open eld.
2 The sound power level is a laboratory measure of the emitted sound power
but contrary to the noise level, it doesn't correspond to the measure of the felt.
3 Refrigerant R410A (as per the standard EN 378.1).
4 Factory charge of refrigerant R410A.
5 Taking into account the possible additional load of refrigerant R410A (seepage 20).
Installation and operating manual "1533 - EN" - 5 -
Air to Water Heat Pump

31 77900330 12
9
400
650
21
1290
147
170
196
370
99
3/8”
5/8”
Air
Overflow hole (Ø 20) 4 Ø 10)Holes
Top view
Front view
Sight of lower part
Side view
Air
Air
gure 1 - Dimensions in mm
900
1290
9
21
650
370
Air
31 12330
400
Air
Air
Overow hole (ø 20) 4 Holes (ø 10)
Sight of lower part
Front view
Top view
Side view
Installation and operating manual "1533 - EN"
Air to Water Heat Pump
- 6 -
"


"



450
800
832,8
97 98 457
81
479
Heating return
ø M 26x34
Heating ow
ø M 26x34
Front view Side view
"
gure 2 - Dimensions in mm
Installation and operating manual "1533 - EN" - 7 -
Air to Water Heat Pump

gure 3 - Hydraulic pressures and
ow rates available
-50
1000
10000
43907
2490
338
-25 0 25 50 75 ° C
0
2500
5000
7500
10000
12500
15000
17500
20000
22500
25000
27500
30000
32500
0 10 20 30 40 50 60 70 80 90 100
°C
Outdoor sensor QAC34
Heat pump return sensor
Heat pump ow sensor
gure 4 - Ohmic values of the sensors
(Hydraulic module)
gure 5 - Ohmic values of the sensors (outside unit)
-20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130
10000
1000
100
10
1
- Compressor.
- Discharge.
- Condensation.
- Evaporator outlet.
- Evaporator center.
- Compressor casing.
- Outside.
Temperature °C
Ohmic value (kΩ)
0
100
200
300
400
500
600
mbar
1 mbar = 10 mmCE = 100 Pa
m /h
3
11,5 2 2,50,50
2
4
66
ext. in
2
4
67
4
2
0
100
200
300
400
500
600
mbar
1 mbar = 10 mmCE = 100 Pa
m /h
3
11,5 2 2,50,50
2
4
77
ext. in
2
4
67
4
2
Variable pressure
Constante pressure
Installation and operating manual "1533 - EN"
Air to Water Heat Pump
- 8 -

 
gure 6 - Outdoor unit components
Legend :
1 - Low-noise, high-output coil.
2 - Electric variable speed "inverter" motor.
3 - "Inverter" control module.
4 - Vacuum start (pump down) and control light.
5 - Connection terminal blocks
(power and interconnection).
6 - Refrigerant accumulator bottle.
7 - Cycle reversing valve.
8 - Anti-corrosion treated bodywork.
9 - Electronic expansion valve.
10 - Noise and temperature insulated "inverter" compressor.
11 - Refrigeration connection valves (ared connectors) with protective caps.
12 - Holding tank with condensate drain hole.
13 - High-performance exchange surface evaporator ; anti-corrosion treated hydrophilic aluminium ns
and grooved copper tubes.
14 - Solenoid valve for liquid injection.
15 - Electric expansion valve for liquid injection.
"

"

1
2
3
4
5
6
7
8
9
10
11
12
13 14
15
2
1
3
4
5
7
9
8
10
12
13
11
14
15
6
Installation and operating manual "1533 - EN" - 9 -
Air to Water Heat Pump

 
The heat pump transmits the energy contained in the
surrounding air into the dwelling to be heated.
The heat pump consists of four main elements, in which
a refrigerant uid (R410A) circulates.
- In the evaporator (ref. , gure 6, page 9) :
The energy is taken from the surrounding air and is
transmitted to the refrigerant. Because it has a low
boiling point, it changes from the liquid state to the
vapour state, even in cold weather (down to -15 °C
outdoor temperature).
- In the compressor (ref. , gure 6, page 9) :
The vaporised refrigerant brought to high pressure
and takes on more calories.
- In the condenser (ref. , gure 7, page 10) :
The energy in the refrigerant is transmitted to the
heating circuit. The refrigerant returns to liquid state.
- In the expansion valve (ref. , gure 6, page 9) :
The liqueed refrigerant is brought back to low pressure
and returns to its initial temperature and pressure.
The heat pump is equipped with a controller, which
controls the room temperature based on the outdoor
temperature measurement and governed by the
temperature control. The room thermostat (option)
provides a corrective action for the temperature control.
The hydraulic unit is tted with an electrical back-up
system or, optionally, boiler connection which starts up
in order to provide addtional heating during the coldest
periods.
Legend :
1 - Electric box.
2 - Regulator / User interface.
3 - Start/stop switch.
4 - Heating circulation pump.
5 - Heating ow.
6 - Gas refrigeration connection.
7 - Liquid refrigeration connection.
8 - Heating return.
9 - Drain valve.
10 - Safety valve.
11 - Manometer.
12 - Manual drainer.
13 - Expansion vessel.
14 - Back-up resistance.
15 - Condenser.

- The heating circuit's initial temperature is controlled by
the temperature control.
- The power of the outdoor unit is modulated according
to ow heating temperature via the "inverter"
compressor.
- Control of the electrical back-up heating.
- The daily timer program enables you to dene
the periods for comfortable or reduced ambient
temperature.
- Summer/winter mode switchover is automatic.
- Control of the supplementary boiler* (options).
- The room thermostat (option)*: provides a corrective
action for the temperature control.
- Control of a second heating circuit*.
- Domestic hot water*: Heating time program, control of
the operation of the DHW circulation pump.
- Managing the cooling*.
- Control of swimming pool heating*.
 If the heat pump is equipped with optional equipment and the
associated kits.

- Anti-legionella cycle for domestic hot water.
- Frost protection: Frost protection cuts in if the low-
temperature point of the heating circuit falls below 5 °C
(provided that the heat pump's electrical power supply
is not interrupted).
gure 7 - Hydraulic unit components


  









Front view Side view
Installation and operating manual "1533 - EN"
Air to Water Heat Pump
- 10 -


Two domestic hot water (DHW) temperatures can be
parametered: nominal temperature (line 1610 to 55 °C)
and reduced temperature (line 1612 to 40 °C).
The default heat pump program (line 560, 561 and 562)
is set for nominal temperature from 0:00 to 5:00 and
from 14:30 to 17:00 and for reduced temperature for the
rest of the day. This optimizes electrical consumption
while ensuring comfortable availability of hot water.
Setting for reduced temperature can be useful to prevent
the DHW from switching on too often and for too long
during the day.
The production of domestic hot water (DHW) is triggered
when the temperature in the tank falls 7°C (setting from
line 5024) below the set temperature.
The heat pump produces the domestic hot water, which
is then additively heated, if required, by electrical back-
up heating inside the tank. To ensure a DHW setting
over 45°C, the electrical back-up heating or the boiler
must be left on.
Depending on how the parameter (1620) is set, nominal
temperature can be reached 24h/day or only at night or
depending on the heat pump program.
If the contract concluded with the energy provider
includes a subscription to day/night tariff, the electrical
backup is subordinate to the supplier’s power tariff and
the comfort temperature may only be reached at night.
If no particular contract is concluded, the comfort
temperature can be reached at any time, including
during the day
The production of DHW takes priority over heating;
nevertheless the production of DHW is controlled by
cycles that control the times assigned to the heating
and the production of DHW in the event of simultaneous
demand.
A function to switch from "reduced" to "nominal"
is provided on the front of the user interface.
(see ref. , gure 34, page 34).
Anti-legionella cycles can be programmed.

Do not use a room sensor in the area.
gure 8 - Heat pump operating principle
Ev
Dt
Cn
Cp
1 kW
COP 4
4 kW
20 °C
PAC
 - Heat pump
 - Evaporator
 - Compressor
 - Condenser
 - Expansion valve







Installation and operating manual "1533 - EN" - 11 -
Air to Water Heat Pump

 
 
 
The appliance must be installed and the maintained
by an approved professional in accordance with the
prevailing regulations and code of practice, in particular:
- The legislation on the handling of refrigerants.
- Heating installation with oor heating system.
- Low voltage electrical installations - Rules.
 
 
Carefully check, in the carrier's presence, the general
appearance of the appliances and check that the
outdoor unit is not laid on its side or back.
In the case of any dispute, state any appropriate
reservations to the carrier in writing within 48 hours and
send a copy of this letter to the After-Sales service.
 
The outdoor unit should not be laid on its side or back
during transport.
If not kept upright during transport, the appliance could
be damaged through displacement of the refrigerant
and deformation of the compressor suspension.
Any damage caused by transportation of the unit lying
down is not covered by the warranty.
If necessary the outdoor unit may be tilted only during
manual handling (to go through a door or use a staircase).
This operation must be conducted very carefully and
the appliance must be immediately restored to upright
position.
 
Accessories provided with the outdoor unit (gure 9).
Accessories provided with the hydraulic unit (gure 10).
 
The choice of the position for installation is particularly
important insofar as any later movement is a delicate
operation requiring the intervention of a qualied person.
Choose the site of the outdoor unit and the hydraulic
unit after discussion with the customer.
Observe the maximum and minimum distances between
the hydraulic unit and the outdoor unit (gure 15, page 18),
the guarantee of the performances and the system's
service life depend on this.
 
 
"



• Choose a site that is preferably sunny and sheltered
from strong cold predominant winds (mistral,
tramontana, etc…).
• The unit must be easily accessible for future installation
and maintenance work (page 15).
• Ensure that it is possible to make the connections to
the hydraulic unit easily.
• The outdoor unit is able to withstand bad weather but
avoid installing in a position where it is likely to be
exposed to signicant dirt or owing water (under a
defective gutter for example).
• Water may drain away from the outdoor unit when it
is operating. Do not install the appliance on a paved
terrace; choose a well-drained place (e.g. gravel
or sand). If the installation is in an area where the
temperature can be lower than 0°C for a long period,
check that the presence of ice does not present any
danger. A drainage pipe can also be connected to the
outdoor unit (see gure 12, page 14).
1
3
2
4
1 Elbow
For draining away the
condensates
2
Plug (x 2)
(Depending on the
model)
gure 9 - Accessories provided with the outdoor unit
8
5 6
7
5 Bracket To secure the hydraulic
model
6 Outdoor sensor To monitor the outside
temp
gure 10 - Accessories provided with the hydraulic unit
Installation and operating manual "1533 - EN"
Air to Water Heat Pump
- 12 -

• Nothing should obstruct the air circulation through the
evaporator and from the fan (gure 11).
• Keep the outdoor unit away from heat sources and
inammable products.
• Make sure the appliance not disturb the surrounding
area or users (noise level, draught generated, low
temperature of the air being blown out, with the risk of
freezing plants in its path).
• The surface on which the appliance is installed must:
- be permeable (soil, gravel, etc),
- support its weight easily,
- provide a solid xing and
- not transmit any vibration to the dwelling.
(Anti-vibratory blocks are available as an option).
• The wall brackets is strongly discouraged due to
vibration.
gure 11 - Minimum installation clearances around outside unit (all models)
1000
150
600
2000
or more 250
or more
250 3000
or more
600
600
1500
250
or more
250
250
250
or more
1500
500
Max.300
1500
300
Max. 500
1000 1500
250
250
500
Max. 500
1000
or more
200
300
200
1000
or more
150
150
250
250
or more 1500
or more
250
250
or more
300
250
250
or more 1500
or more
500
Minimum
Minimum
Minimum
Minimum
Minimum
Minimum
Minimum
MinimumMinimum
Minimum
Minimum
Minimum
Installation and operating manual "1533 - EN" - 13 -
Air to Water Heat Pump

 
The outdoor unit must be raised at least 50 mm above
ground level. In areas prone to snow, this height should
be increased but should not exceed 1,5 m (gure 12).
- Fasten the outdoor unit by means of screws and
rubber tightening or toothed lock washers to avoid
their coming loose.
"
In the area with heavy snowfall, if the intake and outlet
of outdoor unit is blocked with snow, it might become
difcult to get warm and it is likely to cause of the
breakdown.
Please construct a canopy and a pedestral or place the
unit on high stand (local congured).
- Set the unit on a strong stand, such as one made of
concrete blocks to minimize shock and vibration.
- Do not set the unit directly on the ground because it will
cause trouble.
 
(see gure 12).
If the use of a discharge pipe is imperative:
- Use the elbow provided () to connect a 16mm-
diameter hose for draining away the condensate.
- Use the stopper or stoppers provided () to block the
opening of the condensate tank.
Allow for the condensate to ow away under the force of
gravity (waste water, rain water, gravel bed).
"        
       
        
        
       
      

gure 12 - Positioning of the outside unit,
draining away the condensate
* In regions subject to frequent snow,
(H) must be greater than the average snow layer


4 holes
(ø 12 mm)
Installation and operating manual "1533 - EN"
Air to Water Heat Pump
- 14 -

 
 
• The room in which the appliance operates must
comply with the prevailing regulations.
• To facilitate maintenance and to allow access to the
various components, we recommend that you provide
sufcient space all around the hydraulic unit.
350 mm
mini
1000 mm
300 mm
mini
(S)
1
2
118 mm
(S)
538 mm
mini
418 mm
mini
300 mm
mini
350 mm
mini
188 mm
gure 13 - Mounting bracket
• Be careful not to bring inammable gas near to the
heat pump during its installation, in particular when
it requires brazing. The appliances are not reproof
and should therefore not be installed in a potentially
explosive atmosphere.
 
- Fix the support solidly (4 screws and plugs) to a at,
hard-wearing wall (not a light partition) ensuring that it
is correctly levelled.
- Hook the appliance onto its support.
Installation and operating manual "1533 - EN" - 15 -
Air to Water Heat Pump

 
"
Comply with the legislation for handling refrigerants.
 
• After every intervention on the refrigeration circuit and
before nal connection, take care to replace the plugs
in order to avoid any pollution from the refrigeration
circuit.

- Set of manometers with hoses exclusively reserved
for HFCs (Hydrouorocarbons).
- Vacuum pump specially for HFCs.
- Provision on using tools that have been in contact with
HCFCs (R22 for example) or CFCs.
- Use of a traditional vacuum pump is authorized if,
and only if, it is tted with a non-return valve on the
suction side.
The manufacturer declines any liability with regard to the
guarantee if the above instructions are not observed.

"

- Only lubricate with polyolester refrigeration oil (POE).
If POE is not available, t without lubrication.

- Silver brazing (40% minimum recommended).
- Brazing only under dry nitrogen internal ux.
• To eliminate any lings in the pipes, use dry nitrogen
to avoid introducing any humidity that may adversely
affect the appliances operation. In general, take every
precaution to avoid humidity penetrating into the
appliance.
• Proceed to insulate the gas and liquid pipes to avoid
any condensation. Use pipe insulators resistant to
temperatures over 90°C. In addition if the humidity
level in areas where the refrigeration pipes are
installed is expected to exceed 70%, protect the pipes
with pipe insulators. Use an insulating material thicker
than 15mm if the humidity level is 70~80%, and an
insulating material thicker than 20mm if the humidity
exceeds 80%. If the recommended thicknesses are
not observed under the conditions described above,
condensation will form on the surface of the insulation
material. Lastly, take care to use pipe insulators
whose thermal conductivity is 0.045 W/mK or less
when the temperature is 20°C. The insulation must be
impermeable to resist the passage of steam during the
defrosting cycles (breglass wool is prohibited).
 
The outdoor unit must be connected to the hydraulic
unit with copper pipes and connections (refrigeration
quality), insulated separately.
Comply with the pipe diameters and the permitted pipe
lengths (gure 15, page 18).


The appliance will be excluded from guarantee if it is
used with refrigeration connections less than 5 m long.
Manipulate the pipes and take them through walls with
protective plugs in place.
Coat the ared surface
with 

Installation and operating manual "1533 - EN"
Air to Water Heat Pump
- 16 -

 
 
- Remove the front panel (2 screws A).
- Remove the left-hand panel (2 screws B).
1
A
1
A
2
gure 14 - Removing the casing
4
3
B
3
B
 
- Cut the pipe to an appropriate length with a pipe-cutter
without deforming it.
- Carefully deburr it, holding the pipe towards the bottom
to avoid introducing lings into the pipe.
- Remove the ared connection nut situated on the
valve to be connected and slip the pipe into the nut.
- Proceed to are, letting the pipe overow the aring
tool.
- After aring, check the condition of the working
radius (). This must not show any scratch or trace of
any fracturing. Also check the dimension ().
 
The refrigeration pipes must be shaped only on a
bending machine or with a bending spring in order to
avoid any risk of crushing or breaking them.
"
• Remove the insulation material locally to bend the
pipes.
• Do not bend the copper to any angle over 90°.
• Never bend pipes more than 3 times in the same
position otherwise traces of fracturing may appear
(from strain-hardening the metal).
Flaring tool
Hose
Flare
nut



ø Hose
Dimensions in mm
  
9,52 (3/8") 2,5 to 2,7 13,2 22
15,88 (5/8") 2,9 to 3,1 19,7 29
Installation and operating manual "1533 - EN" - 17 -
Air to Water Heat Pump

gure 15 - Connecting the ared connections (Pipe diameters and permissible lengths)
Liquid valve
Hydraulic unit
Outdoor unit
Gas valve
Flare nut
Flare nut
Flare nut
Flare nut
"Liquid" refrigeration connection
Diameter D2
“Gas” refrigeration connection
Diameter D1
 
"      

"     

     
       

"
       


- Remove the plugs from the pipes and the refrigeration
connections.
- Present the pipe to the ared connector and screw the
nut by hand while holding the connector with a wrench
until contact.
-  Avoid positioning the Gas pipe in front of
the pump.
- Comply with the indicated tightening torques.
HP model Waterstage High Power single phase & 3-phase
gas uid
Outdoor unit connections 5/8" 3/8"
Refrigeration
connections
Diameter (D1) 5/8" (D2) 3/8"
Minimum length (L) 5
Maximum length* (L) 15
Maximum length** (L) 20
Maxi level difference** (D) 15
Hydraulic unit connections 5/8" 3/8"
 : without additional charge of R410A.
** : Taking into account the possible additional load of refrigerant R410A (see para. "Additional charge", page 20).
DL
mini
5 m DL
mini
5 m
HP
HP
gure 16 - Tightening torque
Designation Tightening torque
Flare nut 9,52 mm (3/8") 32 to 42 Nm
Flare nut 15,88 mm (5/8") 63 to 77 Nm
Plug (A) 3/8" 20 to 25 Nm
Plug (A) 5/8" 30 to 35 Nm
Plug (B) 3/8", 5/8" 10 to 12 Nm
Holding wrench
Torque wrench
Installation and operating manual "1533 - EN"
Air to Water Heat Pump
- 18 -

 
"

"       

"

 

- Remove the protective plugs () from the charging
hole (Schrader) in the gas valve (large diameter).
- Connect the hose to the manifold.
- Connect the bottle of nitrogen to the manifold.
- Pressurize the refrigerant circuit to 10 bar with nitrogen.
- Leave the circuit under pressure for half a day.
- Check that the pressure has not fallen.
- Look for and repair any leaks, and then recommence
the test.
- Once the pressure has remained steady for a few
hours, empty the nitrogen.
      

- Connect the vacuum pump to the manifold.
- Create a vacuum until the residual pressure in the
circuit falls below 0,01 bar.
- Let the pump continue to operate for another
30 minutes after reaching the vacuum.
- Close the blue valve on the set of manometers and
then stop the vacuum pump  
.
- Leave for at least half a day.
If after this time the pressure has risen, there
is a leak. Find and repair the leak and then
recommence vacuum testing.
When the pressure remains steady for a few
hours after stopping the vacuum pump, the circuit
can be considered airtight.
- Remove the access plugs () from the valve controls.
- First of all fully open the small valve and then the
large one using a hex key (counterclockwise direction)
without forcing excessively against the stop.
- Remove the blue hose rapidly.
- Ret the 2 plugs and tighten them to the recommended
tightening torque (gure 16, page 18).
The outdoor unit does not contain any additional
refrigerant, enabling the installation to be purged.
Flushing is strictly forbidden.
Lo Hi
Manometer kit
(manifold)
Vacuum pump
Service hose
Low
pressure High pressure
Gas valve
Large diameter
Vacuum meter
Refrigeration connexion
Plug (A)
Hex / Allen key of 4 mm
3-way valve
Load orifice
Plug (B)
Service hose (blue)
fitted with valve push-button
gure 17 - Extraction under vacuum and gassing
Hex / Allen key
4 mm
 
Once the refrigeration circuit has been gassed as
described above, check that all the refrigeration
connectors are gas-tigh (4 connectors).
The sealing test must be performed with an approved
gas detector. If the arings have been made correctly,
there should be no leaks.
"
- Bring the gas into the outdoor unit (pump down).
- Make the connection again.
- Repeat the commissioning procedure.
Installation and operating manual "1533 - EN" - 19 -
Air to Water Heat Pump

 
 

Conrm that the power (ref. , gure 7, page 10) is off,
and then open the service panel.

--1- Check the 3-way valves (both at the liquid side
and gas side) are opened.
--2- Turn the power on.
POWER
ERROR
PUMP
DOWN
(L1)
LOW NOISE PEAK CUT
MODE (L2) (L3) (L4) (L5) (L6)
●○○○○○○○
--3- Press "PUMP DOWN" switch for 3 seconds
or more after 3 minutes after power on.
POWER
ERROR
PUMP
DOWN
(L1)
LOW NOISE PEAK CUT
MODE (L2) (L3) (L4) (L5) (L6)
●○●○○●●●
LED display lights on as shown in the above gure,
and the fans and the compressor start operating. If the
"PUMP DOWN" switch is pressed while the compressor
is operating, the compressor will stop, then start again
in about 3 minutes.
--4- LED display will change as shown below about
3 minutes after the compressor starts. Fully close
the 3-way valve on the liquid pipe side at this stage.
POWER
ERROR
PUMP
DOWN
(L1)
LOW NOISE PEAK CUT
MODE (L2) (L3) (L4) (L5) (L6)
●○●○○○●●
If the valve on the liquid pipe side is not closed, the
pump down cannot be performed.
--5- When LED display changes as shown in the below
gure, close the 3-way valve on the gas pipe side
tightly.
POWER
ERROR
PUMP
DOWN
(L1)
LOW NOISE PEAK CUT
MODE (L2) (L3) (L4) (L5) (L6)
●○●○○○○●
- If the valve on the gas pipe side is not closed, refrigerant
may ow into the piping after the compressor stops.
4
Closing
direction
Liquid
pipe
Hexagon
wrench
Gas
pipe
5
Closing
direction
 
50 g of R410A
per additional meter
Length of
the connections 15 m 20 m max.
Additional charge none 250 g
The charge in the outdoor units corresponds to the
maximum distances between the outdoor unit and the
hydraulic unit dened in gure 15. If the distances are
greater, an additional charge of R410A is required.
The additional charge depends on the distance
between the outdoor unit and the hydraulic unit for
each type of appliance. The additional charge of R410A
must necessarily be made by an approved refrigeration
engineer.
• Example of additional charge :
An outdoor unit 17 m away from the hydraulic unit will
require an additional charge of :
Additional charge = (17 - 15) x 50 = 100 g.
The charge must be introduced after creating the
vacuum and before the hydraulic unit is lled with gas,
as follows :
- Disconnect the vacuum pump (yellow hose) and
connect a bottle of R410A instead   
.
- Open the bottle’s valve.
- Bleed the yellow hose by loosening it slightly on the
manifold side.
- Place the bottle on scales with a minimum accuracy
of 10 g. Note the weight.
- Carefully open the blue valve slightly and check the
value shown on the scales.
- As soon as the value displayed has dropped by the
value for the calculated additional charge, close the
bottle and disconnect it.
- Then rapidly disconnect the hose connected to the
appliance.
- Proceed to ll the hydraulic unit with gas.
"
• Only use R410A !
• Only use tools suitable for R410A
(set of manometers).
• Always charge in the liquid phase.
• Never exceed the length or the maximum difference
in level.
R410A
gure 18 - Gas bottle R410A
Gas
Liquid
Installation and operating manual "1533 - EN"
Air to Water Heat Pump
- 20 -