Glen Dimplex System M Comfort 9/12 kW User guide

Order no.: DOK41 HOIAO C0DEN EN · FD 9912
System M
Comfort 9/12 kW
Installation and
Operating Instruction
Air-to-Water
Heat Pump
in Integral Design
Glen
Dimplex
Thermal
Solutions
Dimplex
091HOIAOC6
121HOIAOC6

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Air-to-water heat pump 9 - 12 kW English
Table of contents
1 Please read immediately...................................................................................................................................2
1.1 Intended use............................................................................................................................................................................. 2
1.2 Legal regulations and directives ........................................................................................................................................ 2
1.3 Energy-efficient use of the heat pump............................................................................................................................ 2
2 Intended use of the heat pump ......................................................................................................................3
2.1 Area of application.................................................................................................................................................................. 3
2.2 Operating principle................................................................................................................................................................. 3
3 Scope of supply ..................................................................................................................................................4
3.1 Indoor unit ................................................................................................................................................................................. 4
3.2 Outdoor unit.............................................................................................................................................................................. 5
4 Transport..............................................................................................................................................................6
4.1 Outdoor unit.............................................................................................................................................................................. 6
4.2 Indoor unit ................................................................................................................................................................................. 6
5 Installation ...........................................................................................................................................................8
5.1 Outdoor unit.............................................................................................................................................................................. 8
5.2 Indoor unit ................................................................................................................................................................................. 9
5.3 Acoustic emissions................................................................................................................................................................. 9
6 Assembly / connection.................................................................................................................................. 10
6.1 Assembly of the refrigerant line and electric wire .....................................................................................................10
6.2 Condensate drain..................................................................................................................................................................10
6.3 Connection on heating side ..............................................................................................................................................10
6.4 Temperature sensor connection .....................................................................................................................................11
6.5 Electrical connection ...........................................................................................................................................................12
6.6 Refrigerant pipe connections ...........................................................................................................................................15
7 Commissioning ................................................................................................................................................ 17
7.1 General......................................................................................................................................................................................17
7.2 Preparation..............................................................................................................................................................................17
7.3 Procedure ................................................................................................................................................................................17
8 Cleaning / maintenance ................................................................................................................................ 18
8.1 Maintenance ...........................................................................................................................................................................18
8.2 Cleaning the indoor unit .....................................................................................................................................................18
8.3 Cleaning the outdoor unit ..................................................................................................................................................18
9 Faults / troubleshooting................................................................................................................................ 19
10 Decommissioning / disposal ........................................................................................................................ 19
11 Device information ......................................................................................................................................... 20
12 Dimension drawing......................................................................................................................................... 22
12.1 Dimension drawing outdoor unit.....................................................................................................................................22
12.2 Dimension drawing indoor unit ........................................................................................................................................23
12.3 Dimension drawing legend................................................................................................................................................24
13 Diagrams ........................................................................................................................................................... 25
13.1 Characteristic curve heating 9 kW ..................................................................................................................................25
13.2 Characteristic curve heating 12 kW ...............................................................................................................................26
14 Product information as per Regulation (EU) No 813/2013, Annex II, Table 2.................................. 27
16 Information on the use of data..................................................................................................................... 30
17 Declaration of conformity............................................................................................................................. 31

2 DOK41 HOIAO C0DEN · FD 9912 www.gdts.one
English Air-to-water heat pump 9 - 12 kW
1 Please read immediately
1.1 Intended use
This device is only intended for use as specified by the manu-
facturer. Any other use beyond that intended by the manufac-
turer is prohibited. This requires the user to abide by the rele-
vant project planning documents. Please refrain from
tampering with or altering the device.
1.2 Legal regulations and directives
This heat pump is designed for use in a domestic environment
according to Article 1, Paragraph 2 k) of EC directive 2006/42/
EC (machinery directive) and is thus subject to the require-
ments of EU directive 2014/35/EU (low-voltage directive). It is
thus also intended for use by non-professionals for heating
shops, offices and other similar working environments, agricul-
tural establishments and hotels, guesthouses and other resi-
dential buildings.
The construction and design of the heat pump complies with all
relevant EU directives, DIN and VDE regulations.
When connecting the heat pump to the power supply, the rele-
vant VDE, EN and IEC standards are to be adhered to. Any fur-
ther connection requirements stipulated by local utility compa-
nies must also be observed.
When connecting the heating system, all country-specific reg-
ulations must also be adhered to.
This unit can be used by children aged 8 and over and by per-
sons with limited physical, sensory or mental aptitude or lack of
experience and/or knowledge, providing they are supervised or
have been instructed in the safe use of the unit and understand
the associated potential dangers.
Children must not play with the device. Cleaning and user
maintenance must not be carried out by children without su-
pervision.
!!
ATTENTION!
Work on the heat pump must only be performed by author-
ised and qualified after-sales service technicians!
HINWEIS
ºººººº
NOTE
When operating or maintaining a heat pump, the legal require-
ments of the country where the heat pump is operated apply.
Depending on the refrigerant fill quantity, the heat pump
must be inspected for leaks at regular intervals by a certified
technician, and these inspections must be recorded.
1.3 Energy-efficient use of the heat
pump
By operating this heat pump you are helping to protect our en-
vironment. The heating system must be properly designed and
dimensioned to ensure efficient operation. It is particularly im-
portant to keep water flow temperatures as low as possible in
heating operation. All connected heat consumers should there-
fore be suitable for low flow temperatures. Raising the heating
water temperature by 1 K corresponds to an increase in electric
energy consumption of approx. 2.5 %. Low-temperature heat-
ing systems with flow temperatures between 30 °C and 50 °C
are particularly well-suited for energy-efficient operation.

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Air-to-water heat pump 9 - 12 kW English
2 Intended use of the heat pump
2.1 Area of application
The air-to-water heat pump is to be used exclusively for heating
of heating water. It can be used in new or existing heating sys-
tems.
The heat pump is suitable for mono energy and bivalent opera-
tion in outside air temperatures of up to -22 °C.
Proper defrosting of the evaporator is guaranteed by maintain-
ing a heating water return temperature of more than 20 °C dur-
ing continuous operation.
It is not designed for the increased heat consumption required
when a building is being dried out. For this reason, the addi-
tional heat consumption should be met using special devices
provided by the customer.
2.2 Operating principle
Surrounding air is drawn in by the fan and fed through the evap-
orator (heat exchanger). The evaporator cools the air, i.e. ex-
tracts heat from it. This extracted heat is then transferred to the
working medium (refrigerant) in the evaporator.
The heat is "pumped" to a higher temperature level by increas-
ing its pressure with the aid of the electrically driven compres-
sors. It is then transferred to the heating water via the liquefier
(heat exchanger).
Electrical energy is used to raise the temperature level of the
heat from the environment. Because the energy extracted from
the air is transferred to the heating water, this type of device is
referred to as an air-to-water heat pump.
The air-to-water heat pump consists of the main components
evaporator, fan and expansion valve, as well as the compres-
sors, the liquefier and the electrical control system.
At low ambient temperatures, humidity accumulates on the
evaporator in the form of frost, reducing the transfer of heat.
Uneven accumulation during this process does not indicate a
fault. The evaporator is defrosted automatically by the heat
pump as required. Under certain atmospheric conditions,
steam may be emitted from the air outlet.

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English Air-to-water heat pump 9 - 12 kW
3 Scope of supply
3.1 Indoor unit
Hydraulic systems
(including a dual differential pressureless
manifold)
1) 50 l buffer tank
2) *Actuator for 3-way reversing valve
3) 3-way reversing valve for generating domestic hot water
4) Regulated auxiliary circulating pump
5) Switch box with heating controller
6) Electric additional heater (2, 4 or 6 kW) for higher domestic
hot water temperatures and for heating support
7) Safety valve, start-to-leak pressure 2.5 bar
8) Expansion vessel (24 l)
9) Universal hardware interface
10) *Regulated heat circulating pump primary circuit
Refrigeration circuit
11) Heat exchanger refrigerant / heating water
12) Compressor
13) 4-way reversing valve
14) Refrigeration circuit controller switch box
15) Filter dryer
16) Refrigerant line connections
17) Collector
* Option
12
11
13
14
15
8
5
6
3
4
9
72*
1
10*
1616
17

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Air-to-water heat pump 9 - 12 kW English
3.2 Outdoor unit
1) Evaporator
2) Fan
3) Expansion valve
4) Switch box
5) Connection for refrigerant line
1
2
4
3
55

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English Air-to-water heat pump 9 - 12 kW
4 Transport
4.1 Outdoor unit
A pallet should be used to transport the heat pump to its final
installation location. The outdoor unit can be transported with a
lift truck, hand truck or similar.
Once the side sections have been removed, the outdoor unit
can be lifted by the cover. For this, loosen the two screws at the
top, tilt the metal plate to the side and remove at the top (see
step 1-3)
4.2 Indoor unit
A lift truck is suited for transporting the unit on a level surface.
Carrying straps may be used if the heat pump needs to be
transported on an uneven surface or carried up or down stairs.
These straps can be passed directly underneath the pallet.
To lift from the pallet, the indoor unit can be tilted back by up to
45° and lifted by the handles on the back at the top.
Tilting more than 45° is not permitted.
Once the two side sections have been removed, the device also
has the option of inserting ¾“ support tubes through the holes
in the frame.
The casing panels must be dismantled in the order outlined be-
low.
The right side panel must be removed first. For this, loosen the
two screws at the top, tilt the metal plate to the right and re-
move at the top (see step 1-3). The left side panel can be re-
moved in the same way.
The front panel can then be removed.
For this, loosen the two screws on the right frame at the side.
Push the metal plate approx. 10 mm to the right, then push it
forwards slightly and remove at the top (see step 4-7). Discon-
nect the connection cables on the display screen.
1.
2.
3.
1.
45°
max.
1.
1.
2.
3.
4.
6.
7.
5.
4.

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Air-to-water heat pump 9 - 12 kW English
After the final positioning at the installation location, remove
the transport fastening on the sprung floor of the compressor
on both sides.
!!
ATTENTION!
Before commissioning, the transport fastening must be re-
moved.

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English Air-to-water heat pump 9 - 12 kW
5 Installation
5.1 Outdoor unit
Among other things, when selecting the installation locations
for the indoor and outdoor units, ensure that the required
length of refrigerant line is as short as possible. The standard
length of a refrigerant line is 3 m. It is possible to have a special-
ist extend the refrigerant line to a length of 7 m up to a maxi-
mum of 10 m, provided that the information in see cap. 6.7 on
page 17 has been heeded.
HINWEIS
ºººººº
NOTE
In snowy areas, the foundation must be of a sufficient height
to guarantee a free air intake.
HINWEIS
ºººººº
NOTE
The cold air is blown out downwards at the side and can result
in black ice on paths and platforms.
The outdoor unit must be installed on a permanently even,
smooth and horizontal surface. The entire base of the frame
should lie directly on the floor. To prevent small animals from
entering the inside of the device, the connection hole in the
base plate must be sealed where necessary.
The outdoor unit is designed for installation close to walls on
even ground and for installation on a wall bracket. The outdoor
unit must always be fixed in place at the installation location
(Cap. 12.1 on page 22). The responsibility for the heat pump in-
stallation lies with the specialist system construction company.
During the installation, local requirements such as building reg-
ulations, static load of the building, and wind exposure must be
accounted for.ad of the building, and wind exposure must be
accounted for.
It must be possible to carry out maintenance work without hin-
drance. This is ensured if the clearance displayed below is
maintained.
The specified dimensions are valid for stand-alone installation
only.
If multiple outdoor units are set up next to each other, the re-
quired minimum distance at the side adds up. Ensure that the
cold expelled air is not sucked in again.
HINWEIS
º
ºº
º
ºº
NOTE
Do not restrict or block the area around the intake or the air
outlet area.
HINWEIS
º
ºº
º
ºº
NOTE
Observe country-specific building regulations!
HINWEIS
º
ºº
º
ºº
NOTE
The physical impacts must be observed for installation close
to walls. No windows or doors should be present in the area
surrounding the air outlet of the fan.
HINWEIS
ºººººº
NOTE
In cases of installation close to a wall, there may be more sed-
iment in the intake and air outlet area due to the air flow. The
colder outside air outlet should discharge in such a way as to
not increase the heat losses in heated neighbouring rooms.
HINWEIS
º
ºº
º
ºº
NOTE
Installation in a hollow or in an inner courtyard is not permit-
ted because cooled air collects at ground level and is drawn in
again by the heat pump during extended periods of operation.
1 m
0,4 m
0,5 m
0,5 m

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Air-to-water heat pump 9 - 12 kW English
5.2 Indoor unit
The indoor unit must be installed in a frost-free, dry room on an
even, smooth and horizontal surface. The entire base of the
frame should lie directly on the floor to ensure an adequate
soundproof seal. The surface must have sufficient load bearing
capacity for the weight of the heat pump and the domestic hot
water quantity.
The indoor unit must be installed so that maintenance work can
be carried out without hindrance. This can be ensured by main-
taining a clearance of approx. 1 m in front of and to the right of
the heat pump.
The clearance specified on the left-hand side is required in
order for the installation technician to connect the hydraulic
and electrical systems.
Neither frost nor temperatures higher than 35 °C must occur in
the installation location at any time of the year.
The minimum volume of the room where the heat pump is in-
stalled must be no less than the following value depending on
the refrigerant quantity in the device:
If the refrigerant quantity is increased, the room volume must
be calculated according to the following formula:
[minimum permissible room volume m³] =
[refrigerant quantity in kg] / [permissible concentration
0.39 kg/m³]
5.3 Acoustic emissions
The heat pump operates silently due to efficient sound insula-
tion. Internal insulation measures should be carried out to pre-
vent vibrations from being transmitted to the foundation or to
the heating system.
Perfor-
mance level
Amount of
refrigerant
Permissible
concentrationin
the installation
room according
to DIN EN 378
(Tab. C.3)
Minimum per-
missible room
volume for
indoor installa-
tion
9kW 4.20kgR410A 0.39kg/m³ 10.8m³
12 kW 4.78 kg R410A 0.39 kg/m³ 12.3 m³
1,0 m
1,0 m
0,6 m

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English Air-to-water heat pump 9 - 12 kW
6 Assembly / connection
6.1 Assembly of the refrigerant line
and electric wire
The refrigerant lines and electric wires for connecting the in-
door unit with the outdoor unit must be ordered separately as
accessories.
To route the connection cables, create wall openings at a suita-
ble point. The wall opening must be protected from water pen-
etration according to the local conditions.
The wall openings should be sealed again correctly once the
routing work is complete. (For connecting the electric wire, see
cap. 6.5 on page 12, for connecting the refrigerant line, see
cap. 6.6 on page 15).
6.2 Condensate drain
Condensate that forms during operation must be drained off
frost free. To ensure proper drainage, the outdoor unit must be
mounted horizontally.
The condensate tray offers various options for the condensate
drain:
Foundation covered with gravel. The leaching should be
min. 1.5 l per kW of heat output per day, and the diameter
of the drain pipe should be at least 50 mm.
Channel into a waste water, rain water or drainage channel
If the condensate drain is installed at risk from frost, it must be
protected from freezing with a condensate drain heater, which
is available as a special accessory.
This must be connected in the outdoor unit, parallel to the noz-
zle ring heater (E4).
!!
ATTENTION!
The frost line can vary according to the climatic region. The
regulations of the countries in question must be observed.
6.3 Connection on heating side
Before connecting the heating system to the heat pump, the
heating system must be flushed to remove any impurities, resi-
due from sealants, etc. Any accumulation of deposits in the liq-
uefier may cause the heat pump to completely break down.
A purging option must be arranged directly upstream and
downstream of the indoor unit.
Once the heat pump has been connected to the heating sys-
tem, it must be filled, purged and pressure-tested.
When doing so, it must be ensured that all heating circuits and
isolating valves are open and that the 3-way reversing valve is in
heating operation (pos. 1 factory default). Fill the heating sys-
tem at the fill and drain cock (pos. 2) until system pressure (ap-
prox. 1.5 bar) is reached. A suitable fill hose with a pressure
gauge should be used. When doing so, check all connections
and the entire heating system for leakages. The heating system
should be purged at the highest point (pos. 3, e.g. radiator, heat
pumps connection).
After all of the air has been purged here, the indoor unit must be
purged at the valves of the electric auxiliary heating (pos. 4),
buffer tank (pos. 5), dirt filter (pos. 6) and plate heat exchanger
(pos. 7) until the heating water also exits free of bubbles here.
Finally, close the fill and drain cock, check the system pressure
and top up if necessary.
3
3
3
3
2
4
5
1
6
7

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Air-to-water heat pump 9 - 12 kW English
The following points must be observed when filling the system:
Untreated filling water and make-up water must be of
drinking water quality
(colourless, clear, free of sediments)
Filling water and make-up water must be filtered (max.
pore size 5 µm).
Scale formation in domestic hot water heating systems cannot
be avoided, but in systems with flow temperatures below 60 °C,
the problem can be disregarded. With high-temperature heat
pumps and in particular with bivalent systems in the higher per-
formance range (heat pump + boiler combination), flow tem-
peratures of 60 °C and more can be achieved. The following
standard values should therefore be adhered to with regard to
the filling and make-up water according to VDI 2035, sheet 1:
The total hardness values can be found in the table.
Abb. 6.1:Guideline values for filling and make-up water in accordance with
VDI 2035
For systems with an above-average specific system volume of
50 l/kW, VDI 2035 recommends the use of fully demineralised
water and a pH stabiliser to minimise the risk of corrosion in the
heat pump and heating system.
!!
ATTENTION!
With fully demineralised water, it is important to ensure that
the minimum pH value of 7.5 (minimum permissible value for
copper) is complied with. Failure to comply with this value can
result in the heat pump being destroyed.
Minimum heating water flow rate
The minimum heating water flow rate through the heat pump
must be assured in all operating states of the heating system. If
the minimum heating water flow rate is not reached, the heat
pump is blocked.
The nominal flow rate is specified depending on the max. flow
temperature in the device information and must be taken into
account during planning. For return temperatures under 30 °C,
the flow must be designed for the nominal conditions.
The specified nominal flow rate (see “Device information”) must
be assured in all operating statuses. The installed flow rate
monitoring is used only for switching off the heat pump in the
event of an unusual and abrupt drop in the heating water flow
rate and not to monitor and safeguard the nominal flow rate.
Frost protection
A method of manual drainage should be provided for heat
pumps which are exposed to frost. The frost protection func-
tion of the heat pump manager is active whenever the heat
pump manager and the heat circulating pump are ready for op-
eration. The system must be drained if the heat pump is taken
out of service or in the event of a power failure. The heating cir-
cuit should be operated with a suitable frost protection if heat
pump systems are implemented in buildings where a power
failure can not be detected (holiday home).
6.4 Temperature sensor connection
The following temperature sensors are already installed or must
be installed additionally:
Outside temperature (R1) is (NTC-2)
Return temperature (R2) installed (NTC-10)
Demand sensor (R2.2) installed (NTC-10)
Flow rate monitoring with flow sensor (R3.1) installed
(PT1000)
Domestic hot water temperature (R3) installed (NTC-10)
6.4.1 Sensor characteristic curves
The temperature sensors to be connected to the heat pump
manager must correspond to the values specified in the table.
6.4.2 Mounting the outside temperature
sensor
The temperature sensor must be mounted in such a way that all
weather conditions are taken into consideration and the meas-
ured value is not falsified.
Mount on the external wall on the north or north-west side
where possible
Do not install in a "sheltered position" (e.g. in a wall niche or
under a balcony)
Not in the vicinity of windows, doors, exhaust air vents, ex-
ternal lighting or heat pumps
Not to be exposed to direct sunlight at any time of year
Total heat
output in
kW
Total
Alkaline earths
in mol/m³ and/
or mmol
Specific system volume
(VDI 2035) in l/kW
< 20 20 < 50 50
Total hardness in °dH
< 50 2.0 16.8 11.2
< 0.111
50 - 200 2.0 11.2 8.4
200 - 600 1.5 8.4 < 0.111
> 600 < 0.02 < 0.111
1. This value lies outside the permissible value for heat exchangers
in heat pumps. Temperature in °C -20 -15 -10 -5 0 5 10
NTC-2 in k14.6 11.4 8.9 7.1 5.6 4.5 3.7
NTC-10 in k67.7 53.4 42.3 33.9 27.3 22.1 18.0
PT 1000 in k0.92 0.94 0.96 0.98 1.0 1.02 1.04
15 20 25 30 35 40 45 50 55 60
2.9 2.4 2.0 1.7 1.4 1.1 1.0 0.8 0.7 0.6
14.9 12.1 10.0 8.4 7.0 5.9 5.0 4.2 3.6 3.1
1.06 1.08 1.1 1.12 1.14 1.16 1.18 1.2 1.22 1.24
Dimensioning parameter sensor lead
Conductor material Cu
Cable-length 50 m
Ambient temperature 35 °C
Laying system B2 (DIN VDE 0298-4 /
IEC 60364-5-52)
External diameter 4-8 mm

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English Air-to-water heat pump 9 - 12 kW
6.5 Electrical connection
6.5.1 Circuit diagram
Symbol legend, see cap. 6.5.2 on page 13
Equipment marking, see cap. 6.5.3 on page 13


 

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Air-to-water heat pump 9 - 12 kW English
6.5.2 Symbol legend 6.5.3 Equipment markings
Connector
Plug connection
Compressor / refrigeration circuit
Fan / outdoor unit
Electrical distribution system
Temperature sensor
Floating contact
Controller / WPM
Heating / 2nd heat generator
Pump / hydraulic module
Indoors
Outdoors
Router
LAN
Mixer
Domestic hot water
Heat exchanger
Smart-RTC (Intelligent room temperature controller)
+A100 Refrigeration circuit
+A110 Outdoor unit
+A200 Hydraulics /WPM
+A210 Master unit
+A220 Expansion module WPM
+A300 Electrical distribution system
+A350 Router
+A400 Hydraulic installation (general)
+A411 Circuit 1: mixed
+A412 Circuit 2: mixed
+A420 Domestic hot water
+A441 Bivalent
+A442 Renewable
+A451 Cooling active
B3 domestic hot water thermostat
B4 Swimming pool water thermostat
E10.1 Electrical heater
E10.2/3 Oil/gas boiler
H5 Remote fault indicator
K21 Flange heater
K22 Utility block
K23 Disable contactor
K28 Switching heating/cooling
K31 Circulation system requirements
M13 Heat pump heating circuit 1
M15 Heat pump heating circuit 2
M16 Auxiliary circulating pump
M18 Domestic hot water circulating pump
M21 Mixer for heating circuit 1
M22 Mixer for heating circuit 2
M24 Domestic hot water circulation pump
M26 Mixer bivalent
M27 Mixer renewable
M28 Pump renewable
N5 Dew point monitor
N9 Room thermostat
N24 Smart-RTC
N27 Smart grid
R1 External sensor
R2.2 Demand sensor
R3 Domestic hot water sensor
R13 Sensor renewable
R34 Sensor bivalent
R35 Sensor circuit 1
R5 Sensor circuit 2
X1 Plug load feed
X2 Plug control voltage
X5.x Communication
Xx Connector

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English Air-to-water heat pump 9 - 12 kW
6.5.4 Electrical connection general
All connection cables must be provided on-site. The cable type
(cross-section, conductor type, etc.) must be chosen taking
into account the relevant electrical parameters (e.g. power, cur-
rent, voltage, etc.) and the applicable VDE, EN and VNB regula-
tions. Information on this can be found in the device informa-
tion and the electrical documentation as a planning aid.
!!
ATTENTION!
The plugs are protected against being pulled. They must be
released with a small screwdriver before disconnecting.
6.5.5 Electrical connection indoor unit
For operating the heat pump, at least the following cables / sig-
nals must be connected:
Supply voltage / refrigeration circuit
An all-pole disconnecting device with a contact gap of at
least 3 mm (e.g. utility blocking contactor or power contac-
tor) must be installed in the refrigeration circuit power sup-
ply. A 3-pole circuit breaker with joint tripping of all outer
conductors (trip current in accordance with device infor-
mation) provides the short circuit protection taking into ac-
count the layout of the internal wiring. The relevant com-
ponents in the heat pump contain an internal overload
protection.
For connecting on the switch box of the refrigeration cir-
cuit modules on +A100-X1, check for the clockwise rotat-
ing field of the load feed.
Phase sequence: L1, L2, L3.
!!
ATTENTION!
Ensure that there is a clockwise rotating field: With incorrect
wiring the starting of the heat pump is prevented. A relevant
warning is shown.
Communication / control voltage (hydraulics <-> refrigera-
tion circuit)
The communication and control voltage cable from the hy-
draulic switch box (with heat pump manager) to the refrig-
eration circuit module are already pre-wired and end on the
plugs +A100-X2 (control voltage) and +A100-X5.1 (com-
munication). These may only have to be inserted.
Control voltage
The three-core supply cable for the heat pump manager
(+A200-N1) is fed into the heat pump to the hydraulic
switch box +A200-X2. The supply cable (L/N/PE ~230 V,
50 Hz) must have a continuous voltage. For this reason, it
should be tapped upstream from the utility blocking con-
tactor or be connected to the household current, because
otherwise important protection functions could be lost
during a utility block.
Utility block
The utility blocking contactor (K22) with 3 main contacts
(1/3/5 // 2/4/6) and an auxiliary contact (NO contact 13/
14) should be dimensioned according to the heat pump
output and must be supplied on-site. The potential-free
NO contact of the utility blocking contactor (13/14) is
wired to the hydraulic switch box and must be connected
on the relevant plug +A200-XK22 there. Caution! Extra-
low voltage!
External sensor
The external sensor is connected to the hydraulic module
via the +A200-XR1 plug
Supply voltage hydraulics
For the power supply to the 2nd heat generator, a wire
must be routed to the device according to the power and
connected to the hydraulic switch box on plug +A400-X1.
In delivery state, the 2nd heat generator is configured to
6kW to guarantee that the increased heat consumption is
met while drying out the building. In regular operation, this
must be adapted to the actual required additional heating
output (integrated system label).
To reduce it to 4 or 2 kW, one or two connections between
+A400-K20 (relay 2nd heat generator) and +A400-F17
(safety temperature limiter)- both located in the hydraulic
switch box - must be removed.
6.5.6 Electrical connection outdoor unit
A power supply (plug +A110-X1 <-> +A100-X5.2) and commu-
nication line (plug +A110-X5 <-> +A100-X5.2) must be routed
parallel to the split line between the refrigeration circuit and the
outdoor unit.
HINWEIS
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NOTE
The assignment of the heat pump manager is outlined in the
Quick Installation Guide. The functions are also printed on the
label field of the heat pump manager
6.5.7 LAN / network connection
The heat pump is only designed for connection to the internet
via a router. This ensures that the user can access the system at
any time for setting parameters or for reading out information.
Maintenance work or software updates are much easier.
A conventional network cable (Cat. 5) is required for connec-
tion, which is connected between an external router (+A350)
and the network interface (+A210) of the indoor unit.

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Air-to-water heat pump 9 - 12 kW English
6.6 Refrigerant pipe connections
!!
ATTENTION!
Work on the system must only be performed by authorised
and qualified after-sales service technicians.
Certain requirements with regard to pipe length and rise must
be complied with when installing refrigerant pipes. Once all
conditions are met, the connection of the connecting pipe from
the outdoor unit to the indoor unit can begin.
6.6.1 Requirements for the pipe length
and rise
The indoor unit of the heat pump is already filled with refriger-
ant. The standard pipe length is 3.0 m. Up to a length of 7 m, no
additional refrigerant filling is required. For pipe lengths over
7 m, the system must be filled with additional refrigerant in ac-
cordance with the table.
!!
ATTENTION!
Incorrect filling with refrigerant could lead to faults during op-
eration.
!!
ATTENTION!
The length of the refrigerant line is calculated based on the
total line length from the respective connection point of the
indoor unit to the outdoor unit.
Incorrect refrigerant filling or refrigerant lines over 10 m result
in a risk of faults during operation and a complete failure of
the heat pump.
*Example: When installing the 9 kW model at a distance of
10 m, 420 g refrigerant must be added according to the follow-
ing calculation: (10 - 7) x 140 g = 420 g
HINWEIS
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NOTE
If the indoor unit is mounted 2.5 m or more metres higher or
lower than the outdoor unit, a cooling technology specialist
must perform a separate check to ensure that the devices for
conveying the oil up and down the pipes have been installed
correctly in the exhaust gas pipe. The maximum rise (B) be-
tween the indoor and outdoor units is 5 m.
HINWEIS
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ºº
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ºº
NOTE
The specified operating data of the device refers to the stand-
ard pipe length, see device information.
6.6.2 Pipe connection
The connection points for the refrigerant lines must be estab-
lished using the brazing process. All generally applicable instal-
lation and work steps must be followed for this.
During the brazing process, the pipe system must be flushed
with an inert gas (e.g. nitrogen). The adjacent components must
be suitably cooled to prevent them being damaged.
6.6.3 Leak test and evacuation
Air and moisture in the cooling system have unwanted effects
as outlined below.
1) The pressure in the system increases.
2) The operating current increases.
3) The cooling (or heating) output falls.
4) Moisture in the cooling circuit can freeze and block the
capillary tubes.
5) Water can cause corrosion on parts in the cooling
system.
This means that the connection pipes must be checked for
leaks and pumped empty to remove any moisture and non-
condensable gases from the system.
Step 1: Preparation
Ensure that every pipe (liquid and intake side) between the in-
door and outdoor unit is connected correctly. Ensure that both
maintenance valves on the liquid and intake of the indoor unit
are closed at this point.
Step 2: Leakage tightness test
Connect a dry nitrogen gas cylinder (with Schrader) on the
maintenance valve.
Apply 40 bar dry nitrogen to the system. Close the cylinder
valve once the test pressure is reached. The next step is to
search for leaks with liquid soap.
HINWEIS
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ºº
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NOTE
In order to prevent liquid nitrogen from entering the cooling
system, the top side of the gas cylinder must be higher than
the bottom side when pressure is building in the system.
All pipe connections (internal and external) must be
checked for leaks with liquid soap. Bubbles indicate a leak.
The soap must then be wiped away with a clean cloth.
If no leaks are found on the system, drain off the nitrogen.
Model
Pipe size (mm)
(external diame-
ter x wall thick-
ness)
Length A (m) *additional
refrigerant
(g/m)
Gas Liquid Normal Min. Max.
9 kW 18 x 1 12 x 1 7 3 10 140
12 kW 18 x 1 12 x 1 7 3 10 140
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
max. 5 m max. 5 m

16 DOK41 HOIAO C0DEN · FD 9912 www.gdts.one
English Air-to-water heat pump 9 - 12 kW
Step 3: Evacuation
Connect the vacuum pump on the maintenance valve (with
Schrader).
Run the vacuum pump until the relevant vacuum is
reached. An absolute pressure of at least 0.2 mbar must be
achieved during evacuation. Pressures below 0.2 mbar are
advisable, however.
Close the vacuum pump and start filling immediately.
Step 4: Filling
Once the leakage tightness test and evacuation have been car-
ried out correctly, open the maintenance valves on the indoor
unit. For refrigerant lines > 7.0 m, top up the refrigerant accord-
ingly.
The heat pump is now ready for use.

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Air-to-water heat pump 9 - 12 kW English
7 Commissioning
7.1 General
To ensure that commissioning is performed correctly, it should
only be carried out by an after-sales service technician author-
ised by the manufacturer.
HINWEIS
ºººººº
NOTE
Personal protective equipment (protective goggles, safety
shoes and gloves where necessary) must be used when work-
ing on the device. Components with plastic parts must be pro-
tected from impact (e.g. from tools) to prevent damage to
these components.
7.2 Preparation
The following items must be checked prior to commissioning:
All of the indoor unit connections must be installed.
All of the outdoor unit connections must be installed.
The domestic hot water cylinder must be completely filled
and the domestic hot water feed open.
All valves which could impair the proper flow of the heating
water in the heating circuit must be open.
The air intake and air outlet paths must be clear.
The settings of the master unit must be adapted to the
heating system in accordance with the operating instruc-
tions.
The heating water circuit and the buffer tank must be com-
pletely filled and purged.
Ensure that the condensate drain functions properly.
The outflow from the heating water pressure relief valve
must also function correctly.
The system must be completely filled with refrigerant and
the shut-off devices completely open.
7.3 Procedure
The heat pump is commissioned using the master unit or a
smart device paired with the pump. See the “Operation” manual
for instructions on operation, adjustment and set-up.
At heating water temperatures under 7 °C, commissioning is
not possible. The water in the buffer tank must be heated with
the 2nd heat generator to at least 20 °C.
To ensure problem-free commissioning, the following proce-
dure is to be implemented:
1) Close all consumer circuits.
2) Ensure that the heat pump has the correct water flow.
3) Wait until a return temperature of at least 25 °C has been
reached.
4) Now slowly reopen the heating circuit valves in succession
so that the heating water flow rate is constantly raised by
slightly opening the respective heating circuit. The heat-
ing water temperature in the buffer tank must not be al-
lowed to drop below 20 °C during this process. This en-
sures that the heat pump can be defrosted at any time.
5) When all heating circuits are fully open and a return tem-
perature of at least 20 °C is maintained, the commissioning
is complete.
!!
ATTENTION!
Operating the heat pump at low system temperatures may
cause the heat pump to break down completely.

18 DOK41 HOIAO C0DEN · FD 9912 www.gdts.one
English Air-to-water heat pump 9 - 12 kW
8 Cleaning / maintenance
8.1 Maintenance
To protect the paintwork, avoid leaning anything against the
device or putting objects on the device. The outdoor unit and
indoor unit of the heat pump can be cleaned and polished with
conventional agents, e.g. car polish.
HINWEIS
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NOTE
Never use cleaning agents containing sand, soda, acid or chlo-
ride, as these can damage the surfaces.
To prevent faults due to sediment in the heat exchangers, care
must be taken to ensure that no impurities can enter either the
heat source system or the heating system. In the event that op-
erating malfunctions due to contamination occur nevertheless,
the system should be cleaned as described below.
8.2 Cleaning the indoor unit
!!
ATTENTION!
The integrated dirt trap must be cleaned at regular intervals.
The maintenance intervals should be defined according to the
degree of soiling in the system. The filter insert should also be
cleaned.
For cleaning, the heating circuit must be made pressureless in
the vicinity of the dirt trap, the filter compartment unscrewed,
and the filter insert removed and cleaned. Assembly carried out
in reverse order requires attention to correct assembly of the
screen inserts and tightness of the screw joints.
The ingress of oxygen into the heating water circuit may result
in the formation of oxidation products (rust), particularly if steel
components are used. These enter the heating system via the
valves, the circulating pumps and/or plastic pipes. A diffusion-
resistant installation is therefore essential, especially with re-
gard to the complete piping.
HINWEIS
ºººººº
NOTE
We recommend the installation of a suitable corrosion protec-
tion system to prevent the formation of deposits (e.g. rust) in
the liquefier of the heat pump. We recommend equipping dif-
fusion-open heating systems with an electrophysical corro-
sion protection system (e.g. ELYSATOR system).
Residue from lubricants and sealants may also contaminate the
heating water.
In the event of severe contamination leading to a reduction in
the performance of the liquefier in the heat pump, the system
must be cleaned by a heating technician.
Based on current information, we recommend using a 5 %
phosphoric acid solution for cleaning purposes. However, if
cleaning needs to be performed more frequently, a 5 % formic
acid solution should be used.
In both cases, the cleaning fluid should be at room tempera-
ture. We recommend flushing the heat exchanger in the direc-
tion opposite to the normal flow direction.
To prevent acidic cleaning agents from entering the heating
system circuit, we recommend connecting the flushing device
directly to the flow and return of the liquefier of the heat pump.
It is then important that the system be thoroughly flushed using
appropriate neutralising agents to prevent any damage from
being caused by cleaning agent residue remaining in the sys-
tem.
Acids must be used with care and the regulations of the em-
ployers liability insurance associations must be adhered to.
The instructions of the cleaning agent manufacturer must al-
ways be observed.
8.3 Cleaning the outdoor unit
The evaporator, fan and condensate drain should be cleaned of
contamination (leaves, twigs, etc.) before each new heating pe-
riod.
!!
ATTENTION!
Before opening the device, ensure that all circuits are discon-
nected from the power supply.
To prevent the evaporator and the condensate tray from being
damaged, do not use hard or sharp objects when cleaning.
Under extreme weather conditions (e.g. snow drifts), ice may
form on the air intake and air outlet areas in individual cases. If
this happens, the ice must be removed from the vicinity of the
intake and air outlet area to ensure that the minimum air flow is
maintained.
To ensure proper drainage from the condensate tray, it must be
regularly inspected and cleaned, if necessary.