Version 2.2
User Guide
GDH™-G°CEL series
Version 2.2
2
Contents Page
1. Introduction
1.1 Warranty 3
1.2 Functional description 3
1.3 Statutory regulations 3
2. Transportation and assembly
2.1 Transportation 3
2.2 Delivery 3
2.3 Assembly 4
3. Preparing and hydraulic connection
3.1 Preparing 4
3.2 Hydraulic diagram 5
3.3 Hydraulic connection 6
4. Connection to the ground source
4.1 Brine/ sole – water heat pump connection 7
4.2 Water – water heat pump connection 7
5. Installation & electrical connection
5.1 Installation 8
6. Electrical connection
6.1 Installation 380V/50 Hz 9
6.2 Installation 220V/50 Hz 9
6.3 Connection plan 380V/50 Hz 10
6.4 Connection plan 220V/50 Hz 11
7. GDH-Heat-Pump-Manager
7.1 Controller – electronic control technology 12
7.2 Controller options 12
7.3 GDH-Heat-Pump-Manager controller board 13
7.4 GDH-Heat-Pump-Manager connections 14
7.5 Digital 220V controller output 15
7.6 Digital 24V controller input 16
7.7 Analog 0-10V ouputs 16
7.8 Analog inputs 16
8. Heat pump dimensions
8.1 Indoor unit 17
9. EC Declaration 18
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1. Thank you for choosing to purchase a
GDH heat pump.
GDH heat pumps are subject to strict quality
control tests in terms of functional efficiency
and performance d
uring the final inspection
process.
This final inspection includes an additional
examination of all relevant components and
a pressure test. The heating
and output
values are also checked.
Our GDH engineers hope you enjoy our
products and the associated cost savings!
1.1 Warranty
Providing all installation and operation
instructions have been observed, GDH
provides a 24-
month warranty. User error,
improper installation, incorrect control
settings or damage caused by third parties
or vandalism are not
covered by the
warranty.
brine/water heat pumps for indoor installation.
- Heating and cooling (passive)
- Flow temperatures up to 60°C
- Operating range to -5°C till 20°C
- Suitable for radiator and under floorheating
- Control technology for domestic
water generation
1.2 Functional description
Heat is drawn by the ground water. The
obtained heat and additional energy
produced by the compressor, heat the water
on the condenser side using the plate heat
exchanger.
1.3 Statutory regulations
The GDH heat pump series complies with
DIN, VDE and ICL specifications and EU
directives. The specifications and directives
can be found in Chapter 10 “Declaration of
conformity for these installation and
operation guidelines”. All national directives
and specifications
, and those provided by
the utility company must be observed.
2. Transportation and assembly
2.1 Transportation
The heat pump must not be transported in a
tilted position. The heat pump may only be
tilted temporarily during installation.
2.2 Delivery
The heat pump is delivered in a carton box
on a pallet. The heat pump is protected
inside this using carton and a protective film.
To prevent it from falling over during
transportation, the heat pump is bolted to the
pallet.
The surface should be solid a
nd even. A
frost-proof drain or basin must be provided
for the condensation water.
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2.3 Assembly
The GDH heat pump may be installed
outside or inside by a special air flow
construction. A location must be selected
which also provides sufficient s
pace to
service the unit. (Please refer to the “min.
distance” diagram).
- The distance from the house should
be as short as possible to keep
pipework to a minimum.
- The heat pump should be assembled
so that the expelled air is not drawn
back in. If this occurs, a thermal short
circuit is created which lowers the
performance of the heat pump.
- The prevailing wind direction should
be in line with the direction of air
intake of the heat pump.
-
Ensure that the air intakes and
outlets are free from any shrubbery
and tall grass.
-
Bolt the heat pump securely to the
footing.
3.0 Preparing and hydraulic connection
3.1 Preparing
The GDH heat pump may be installed on a
flat ground. A location must be selected
which also provides sufficient space to
service the unit.
(Please refer to the
“Minimum clearance” diagram).
- The distance from the house should
be as short as possible to keep
pipework to a minimum.
-
Bolt the heat pump securely to the
footing.
The sole liquid must be mixed at min. 35%
with Glycol. This concentr
ation warranties a
frost protection temperature till -14NC.
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3.2 Hydraulic diagram
Example
DHW-Domestic Hot Water preparation and heating buffer tank. The switching for the DHWwater preparation is installed at output NO4. For additional electric heating - external heaters
must be installed at output NO8 and NO6.
The DHW 3-way-valve NO4 is controlled by temperature probe B3 and the heating circuit
temperature is controlled by B4 at inlet temperature. When the Heat pump controller
measures that the temperature is under the set point for DHW or the heating circuit - the
compressor will be switched on. DHW has the priority over the heating circuit.
Main circulation pump is controlled by output NO7. The circulation pump works during winter
mode the whole time. In summer mode the circulation pump works only on DHW water
request.
Please refer the following GDH-Manuals for more information:
GDH - Heat pump Manager Users Guide
GDH - Hydraulic plans
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3.3 Hydraulic connection
In order to prevent the heat pump causing
vibrations in the pipe network, the use of a
flexible hydraulic hose between the heat
pump and the buffer tank is recommended.
Connection size:
Model
Connector
size at the
heat pump
Min. pipe
size
G°CEL series
DN32
DN32
Connection for plate heat exchanger.
Simplified Refrigerant & Heating plan.
Please note:
- Hydraulic hoses are already installed
in the heat pump.
- The temperature difference between
the supply and return should be at
least 5 K.
- The flow rate in the pipe network
should not exceed 0.8 m/s.
- In order for the system to defrost
more efficiently a buffer tank must be
installed.
Please note following general pressure
drops in a heating system:
10 kPA = 1 m high for a circulation pump
(please check the diagrams in the
manufacturer manual).
Water tank 1,0-1,5 m
Heat exchanger in a water tank 1,5-2,0 m
Heat pump 1,5-3,0 m
Heat meter 1,5-2,0 m
Filter (new or cleaned) 1,5-2,0 m
Electrical heater 0,5-1,0 m
3-way-valve 1,0-2,0 m
Pipes with angles 0,1-0,5 m
Note: You have to calculate all your pressure
drops in the system.
General: You need a min. 3.5 m
3
/h water
volume flow at 6m (6 kPA) pressure drop.
We suggest you a Wilo Stratos or Grundfos
Magma circulation pump.
Please also check your pressure drops on
the ground source side. Select a circulation
pump carefully according your pressure
drops.
Please refer the GDH-Guide for Heat
pump installations for more information.
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4.0 Connection to the ground source
4.1 Brine/ sole – water heat pump connection
When the heat pump works with brine/ sole water as energy source. You need to mix the
water with glycol (max. 35%) to prevent that the water gets frozen in winter. The sole
distributor can be connected direct to the heat pump.
4.2 Water – water heat pump connection
When the heat pump works with water as energy source. You need to install an additional
heat exchanger or filter between the heat pump and the water source. To prevent the internal
heat exchanger from the ground water. (You need an additional heat exchanger for
water/water connections.)
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5. Installation & electrical connection
5.1 Installation
The system operates on a closed
refrigeration circuit and does not need
to be installed by a refrigeration
engineer.
Step 1
Open the cover plate.
Step 2
Put the display into the frame and
use the two screws to fix it.
Step 3
Connect the cable to the display.
Step 4
Connect the other side to the controller.
Step 5
Put the frame on the display.
Step 6
Connect the temperature sensors from
the outdoor unit to the controller board.
The cable has two-wires - one must
be connected to GND and the other
cable must be connected to the port.
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6. Electrical connection
A suitable qualified or experienced individual
should only carry out all electrical
connections.
Please ensure that:
- The compressor is
protected using
slow-blow automatic circuit breakers
as per the technical data/ initial and
operating voltage the automatic
circuit breakers should be marked
with the code letter “B”
-
Please observe the installation
guidelines of your local energy
supplier.
6.1 Installation 380V/50 Hz
Please connect the main voltage to
the heat pump terminal contactor.
Use a min. cable of 5x 2.5 mm
2
.
NOTE:
Check carefully if you have connected the
right direction for the 3-phase-current. The
compressor would be damaged if it´s running
in a wrong direction. Listen at the noise
when you first start up the heat pump.
Normally the sound is like a washing
machine. Check the high- and low-pressure
values. If the pressure is the same on both
sides the compressor is not connected right.
6.2 Installation 220V/ 50 Hz
Please connect the main voltage to
the heat pump terminal contactor.
Use a min. cable of 3x 4.0 mm
2
.
Use a flat screwdriver for connection
of the cables.
NOTE:
Separate the Voltage cables from the
temperature and the EEV-Extension
cable. It can cause controller errors when
the cables are not separated.
Note:
For cable plans and other technical
information check the GDH-
Guide for
Service the heat pump.
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6.3 Connection plan 380V/ 50 Hz
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6.4 Connection plan 220V/ 50 Hz
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7. GDH-Heat-Pump-Manager
7.1 Controller –
electronic control
technology
This Software is
the new GDH heat pump
management solution. The control system
based on the programmable GDH controller
board comprises the following functions:
- Heat pump control,
- Hot-water preparation and Domestic
Water Generation.
- Control of 2x mixed heating circuits,
- Serial interfaces for a modular
system configuration,
- Connection to BMS systems,
- Substantial energy efficiency and
associated cost savings thanks to the
integrated instrument and facility
management,
- Better system administration via a
simple graphical user interface,
- Anti Legionella protection function for
domestic water,
Bivalent mode for automatic
switchover
between the heat pump
and boiler,
Programmable weekly and daily
timers.
7.2 Controller options
Web-Interface
Room display
Dew point sensor
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7.3 GDH-Heat-Pump-Manager controller board
Please refer the manual “GDH-Heat-Pump-Manager”
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7.4 In/Outputs for GDH-Heat-Pump-Manager controller board
220 Volt Outputs
NO1
Compressor 1
NO2
Geothermal circuit pump
NO3
Primary circuit pump
NO4
DHW 3-way-valve
NO5
Mix circuit pump
NO6
Boiler/ heater
NO7
Heating circuit pump
NO8
DHW Boiler/ heater
NO9 - NO10
4-way reversing valve
NO11
Mix circuit pump 2
NO12
Solar circuit pump
24 Volt Inputs
ID1
Ground source flow switch
ID2
Dew point sensor 1
ID3
-
ID4
Dew point sensor 2
ID5
EVU
ID6
DHW heater overload
ID7
External boiler/ heater alarm
ID8
Remote on-off
ID9
Dew point sensor 3
ID10
Primary circuit flow switch
0-10 Volt Output
Y1 (0-10V)
Mix valve 1
Y2 (0-10V)
Cooling circulation pump
Y3 (0-10V)
Mix valve 2
Y4 (0-10V)
Modulated Geothermal pump
Temperature sensors
B1 (NTC)
Geothermal inlet temp.
B2 (NTC)
Geothermal outlet temp.
B3 (NTC)
DHW control temp.
B4 (NTC)
Prim. system inlet temp.
B5 (NTC)
Mix heating circle temp. 1
B6 (NTC)
Outside air temp.
B7 (NTC)
Primary system outlet temp.
B8 (NTC)
Mix heating 2/ Solar panel temp.
B9 (NTC HT)
Comp. hot gas temp.
B10 (NTC)
Suction temp.
B11 (0-5V)
High pressure transducer
B12 (0-5V)
Low pressure transducer
FACTORY CONNECTED
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7.5 Digital 220V controller output
The outputs are pre-connected with
and fused with 6 Ampere.
Every Port (Relay) has a max. of 2 A.
(DIN EN 60730-1). In total your connected devices should not reach more than 6A.
220 Volt Outputs NO1-NO12
Pre-connected 220V Outputs
Port
1
2
3
4
5
6
NO
2
3
4
5
7
11
Device
Geothermal pump
Primary circuit pump
DHW-pump/ 3-way
Mix circuit pump 1
Heating circuit pump
Mix circuit pump 2
Example connection for the primary
circuit pump at pre-conncection port 1.
For devices greater than 2,5 Ampere
or 380V use a contactor and a fuse.
Port NO6 & NO8 for the electrical heater
or boiler are not pre-conntected.
Example connection for an oil boiler.
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7.6 Digital 24V controller input
The Digital inputs can be used with
devices that have a potential free
contact. All ports can be max. used
with a 24 Vdc signal.
Note: Never connect 220V to the
digital input connectors.
Only connect the digital input to a
potential free contact.
Port
DI
DI
DI
DI
DI
DI
DI
DI
DI
NO
1
2
4
5
6
7
8
9
10
Device
Geothermal flow switch
Dew point sensor 1
Dew point sensor 2
EVU
DHW-heater overload
Boiler/ heater overload
Remote on/off
Dew point sensor 3
Primary circuit flow switch
7.7 Analog 0-10V ouputs
Control signal for 0-10 volt controlled
devices.
Mix valve 1 connection (0-10V) Y1.
Port
Y
Y
Y
NO
1
2
3
Device
Mix valve 1
Cooling circuit pump*
Mix valve 2
*only on/off signal - use a dc contactor
7.8 Analog inputs
Temperature sensor connection.
Connect the cable to G and the
port B for the temperature probe.
Connection for temperature probe
B4 - inlet temperature
Port
B
B
B
B
B
B
B
NO
1
2
3
4
5
6
8
Device
Geothermal inlet temp.
Geothermal outlet temp.
DHW-control temp.
Prim. System outlet temp.
Mix heating circle temp. 1
Outside Air temp.
Mix heating circle temp. 2
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8. Heat pump dimensions
8.1 Indoor unit
A B C
770 mm
450 mm
960 mm
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EC Declaration of Conformity
The undersigned GDH Energy International Ltd.
Rheinlanddamm 201a
44139 Dortmund
Germany
Hereby confirm that the design and construction of the product(s) listed below, in the
version(s) placed on the market by us, conform to the relevant requirements of the applicable
EC directives.
This declaration becomes invalidated if any modifications are made to product(s) without our
prior authorization.
Typ(e):
G°CEL series
Designation EC Directives
Brine-to-water heat pumps 98/37/EG
for outdoor installation 2006/95/EG
2004/108/EG
Harmonized EN Standards:
EN 378 EN 349
EN 60529 EN 60335-1/-2-40
EN ISO 12100-1/2 EN 55014-1/-2
EN ISO 13857 EN 61000-3-2/-3-3
National Directives
BGR 500 Teil 2
DIN 8901
NEV (SR 743.26)
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