INSTALLATION
INSTALLATIE
Grundwasserstation für Wärmepumpen | Groundwater module for heat pumps | Grondwaterstation voor Warmte pompen
» GWS 1
» GWS 2
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GWS | 17
ENGLISH
CONTENTS | INSTALLATION
Safety
INSTALLATION
1. Safety
Only a qualied contractor should carry out installation, com-
missioning, maintenance and repair of the appliance.
1.1 General safety instructions
We guarantee trouble-free operation and operational reliabil-
ity only if the original accessories and spare parts intended for
the appliance are used.
1.2 Further applicable documents
Note
Please observe the operating and installation instruc-
tions of system components.
1.3 Regulations, standards and instructions
Note
Observe all applicable national and regional regula-
tions and instructions.
2. Appliance description
The groundwater station is an assembly with a stainless steel
plate heat exchanger in a duplex casing made from thermally
insulating plastic.
The purpose of the groundwater station is to use groundwater
as a heat source and it can be connected to brine/water heat
pumps.
The connections for the air vent valve and drain & ll valve are
the same. The groundwater station can therefore be rotated
180° and installed on the left or right of the brine/water heat
pump, depending on the location.
The groundwater station comprises several components,
which are described in the following diagrams.
INSTALLATION
1. Safety ������������������������������������ 17
1.1 General safety instructions �������������������� 17
1.2 Further applicable documents ����������������� 17
1.3 Regulations, standards and instructions ��������� 17
2. Appliance description ����������������������� 17
2.1 Standard delivery ��������������������������� 18
2.2 Accessories �������������������������������� 18
3. Installation �������������������������������� 18
3.1 Installing the groundwater station ������������� 19
3.2 Installing the brine circuit ��������������������� 19
3.3 Installing the heat source system ��������������� 20
3.4 Insulation ���������������������������������� 21
4. Commissioning ���������������������������� 21
5. Appliance handover ������������������������ 22
6. Cleaning, care and maintenance �������������� 22
6.1 Maintenance ������������������������������� 22
7. Specication ������������������������������� 23
7.1 Dimensions and connections ������������������ 23
7.2 Standard circuits ���������������������������� 25
7.3 Sizing table �������������������������������� 29
7.4 Data table ��������������������������������� 29
GUARANTEE
ENVIRONMENT AND RECYCLING
18 | GWS
INSTALLATION
Installation
Groundwater station GWS 1
1
2
2
34
6
5
6
26�03�14�0095�
1 Air vent valve
2 Push-t connectors
3 Drain & ll valve
4 Intermediate piece made from EPP
5 Heat exchanger
6 3-way ball valve with ushing facility
Groundwater station GWS 2
1
2
2
3
5
4
5
26�03�14�0096�
1 Air vent valve
2 Push-t connectors
3 Drain & ll valve
4 Heat exchanger
5 3-way ball valve with ushing facility
2.1 Standard delivery
Delivered with the groundwater station:
- 4 double ended screws with rawl plugs, washers and nuts
- 1 air vent valve
- 1 drain & ll valve
- 1 contact sensor AVF 6
2.2 Accessories
Description Part number
Brine pressure switch 221382
3. Installation
Note
We recommend not to install the groundwater mod-
ule in wet rooms. Wet areas include rooms used, for
example, for washing or drying clothes.
To protect the groundwater station against damage, it must
be transported to the installation location inside its original
packaging.
Install the groundwater station in a suitable location next to
or above the heat pump.
26�03�14�0097�
Ensure that the wall structure can bear the weight of the
groundwater station before securing the groundwater
station to the wall.
GWS | 19
ENGLISH
INSTALLATION
Installation
3.1 Installing the groundwater station
26�03�14�0099�
Position the installation template horizontally at the re-
quired installation location. The installation template is
located on one of the aps of the packaging box.
Mark the holes on the wall.
Drill the holes.
Insert suitable rawl plugs into the holes.
Turn the double ended screws into the rawl plugs.
Remove the upper shell of the insulation from the
groundwater station.
Place the groundwater station over the double ended
screws, followed by the washers provided. Secure the
groundwater station with the relevant nuts.
1
2
26�03�14�0096�
3
3
1 Air vent valve
2 Drain & ll valve
3 Lever
Fit the air vent valve and the drain & ll valve in the brine
circuit.
Ensure that the levers of the 3-way ball valves are posi-
tioned for throughput, as shown in the diagram.
3.2 Installing the brine circuit
Note
Read and observe chapter “Installing the heat source
system” in the installation instructions for the brine/
water heat pump.
Install a safety assembly in the brine circuit.
Note
Some brine/water heat pumps are supplied with a
safety assembly.
Note
The heat exchanger should only be operated in coun-
tercurrent (see chapter “Specication / Standard cir-
cuits”).
Fill the brine circuit with an ethylene glycol/water mix-
ture with at least 25 % by vol. ethylene glycol. Check for
tightness.
After lling, vent the brine circuit.
3.2.1 Heat source sensor
Check whether a heat source sensor has already been
installed in the brine/water heat pump. If this is not the
case, install the heat source sensor at the groundwater
station heat pump return (see chapter “Specication /
Standard circuits”).
Use contact sensor AVF 6 as a heat source sensor to capture
the brine temperature.
26�03�01�1431
Clean the pipe.
Apply heat conducting paste.
Secure the sensor with a cable tie.
Connect the contact sensor on heat pump manager
WPMII to the heat source sensor connection (WPMWII
terminal X2/6 and earth; WPMSII terminal X12/1 and 2).
20 | GWS
INSTALLATION
Installation
3.2.2 Heat pump manager settings
!
Appliance damage
First set parameter “SOURCE” to ETHYLENE GLY-
COL and then set parameter “SOURCEMIN” to
2°C on heat pump manager WPMII.
If the heat pump has an integral heat pump manager, observe
the following information.
!
Appliance damage
For a brine/water heat pump with integral heat
pump manager, set parameter “SOURCE” to
“GWS”.
3.2.3 Brine pressure switch DWS
To prevent any leaks causing damage to the heat pump, install
a brine pressure switch if not already pre-tted to the brine/
water heat pump.
Make the brine pressure switch electrical connections ac-
cording to the wiring diagram in chapter “Specication”.
You can obtain a suitable brine pressure switch via your con-
tractor or from us as an accessory. For the part number, see
chapter “Accessories”.
3.2.4 Fitting the push-t connector
Push-t connectors are tted to the brine circuit connections
to make it easier to connect to the heat pump.
The push-t connectors are equipped with a retainer with
stainless steel serrations and an O-ring for sealing. In addition,
they are designed with the “twist and lock” function. By sim-
ply turning the screw cap manually, the pipe is secured in the
connector, and the O-ring is pushed against the pipe to seal it.
!
Appliance damage
Support sleeves are required when using plastic pipes.
Making the connection
The connector must be in its relaxed position before the pipe
is inserted. In this position, there is a small gap between the
screw cap and connector body.
26�03�01�0693
1
1 Gap between screw cap and connector body
Always use a pipe cutter to trim the pipe.
Push the deburred pipe past the O-ring into the connec-
tor as far as it will go.
Tighten the screw cap fully to the casing. This presses the
O-ring against the pipe and locks the connector.
26�03�01�0693
Pipe Ø 28 mm
Depth of insertion A 44 mm
Releasing the connection
26�03�01�0693
Undo the screw cap until a small gap appears.
Press the retainer back with your ngers and hold on to it.
The pipe can now be pulled out again.
3.3 Installing the heat source system
Size the heat source circuit pump (well pump) for the heat
source system according to the system-specic conditions
(see chapter “Specication / Sizing table”).
!
Appliance damage
The groundwater temperature differential between
the heat source flow and return must be ≤ 3 K.
Note
The heat exchanger should only be operated in coun-
tercurrent (see chapter “Specication / Standard cir-
cuits”).
Install a non-return valve above the source circuit pump.
Fill the heat source system. Make sure there are no leaks.
GWS | 21
ENGLISH
INSTALLATION
Commissioning
Required water quality
Common problems when using groundwater as a heat source
include:
- Erosion of heat exchanger and water supply lines.
- Heat exchanger corrosion.
- Sludge contamination or blockages in heat exchanger and
supply lines.
- Sedimentation (blocking) of the return well.
To prevent such problems, the quality of the groundwater used
as heat source must meet the following standards:
- The water must not contain any matter which might
settle.
- Never use surface water or saline water.
- The iron and manganese content must be less than 0.5
mg/l.
In pertinent individual cases, e.g. wells near salt mining areas
or regions with a great prevalence of livestock, the following
water content needs to be taken into consideration:
- Chloride < 300 mg/l
- Chlorine < 0.5 mg/l
If one of the specied limits is exceeded, operation of the
groundwater station is not permissible.
To prevent blockage of the heat exchanger caused by solid
particles transported with the groundwater (sand, ne sludge,
etc.), install a suitable dirt lter with a mesh size of 0.6mm on
site at the heat source ow. You can obtain a suitable dirt lter
via your contractor or from us as a spare part. Install appropri-
ate pre-lters and settlement basins if higher levels of solid
particles are transported with the groundwater.
After lling, vent the heat source system.
Adjust the heat source ow rate so that the brine ow rate at
the brine/water heat pump always corresponds to the required
values.
Note
Read and observe the operating and installation in-
structions for the brine/water heat pump and the di-
agrams in chapter “Specication”.
3.4 Insulation
To avoid condensate and therefore damage to the heat source
system and the brine circuit, insulate them with diusion-proof
material.
Also insulate the drain & ll valve, the air vent valve and
the brine pressure switch.
26�03�14�0101�
Fit the insulation hoses as shown in the diagram above.
1
3
2
26�03�14�0098�
1 Lower shell
2 Upper shell
3 Clip
After insulation, t the upper shell on the groundwater
station.
Secure the upper shell to the lower shell using the clips
provided.
4. Commissioning
Move the levers of the 3-way ball valves to the throughput
position.
Check the system pressure in the brine circuit. The system
must have overpressure of at least 0.1 MPa.
With the “Relay test” parameter on the heat pump man-
ager, check the functioning of the well and brine circuit
pump.
Read the heat source temperature o the heat pump
manager under the “Info temperatures” parameter and
check the plausibility of this value.
Check the “SOURCE MIN” (minimum source temperature)
and “SOURCE” settings on the heat pump manager.
Commission the brine/water heat pump.
The groundwater station temperature dierential between
the heat source inlet and the heat source outlet should be no
higher than 3K.
The temperature dierential ∆ϕ1 in the heat source circuit
must be greater than the temperature dierential ∆ϕ2 in the
brine circuit.
22 | GWS
INSTALLATION
Appliance handover
Examples:
7 °C
4 °C
4 °C
2 °C
Δϕ1
Δϕ2
26�03�14�0121�
10 °C
7 °C
7 °C
5 °C
Δϕ1
Δϕ2
26�03�14�0121�
Note
The groundwater station should only be commis-
sioned if there is a sucient ow rate on the heat
source side.
Also observe the ow rate pressure drop diagrams in chapter
“Specication”.
Check that the hydraulic connection has been carried out
correctly.
5. Appliance handover
Make the user familiar with the appliance and hand them this
manual for safekeeping.
6. Cleaning, care and
maintenance
A damp cloth is sucient for cleaning the casing. Never use
abrasive or solvent-based cleaning agents.
6.1 Maintenance
Note
Switch the heat pump o before carrying out main-
tenance work.
The groundwater station heat exchanger must be ushed on
the source side as required. For this, proceed as follows:
Remove the upper shell of the insulation from the
groundwater station.
To open the heat exchanger, proceed as follows:
1
3
2
1
3
2
26�03�14�0100�
1 Screw cap
2 3-way ball valve with ushing facility
3 Lever
Remove screw caps from connectors.
Connect ushing unit.
Turn 3-way ball valve levers forward 90°.
Flush heat exchanger with a formic acid/water mixture
with 5 %Vol formic acid.
Then ush heat exchanger with clean water. For this, use
15x the volume of the content on the heat source side.
Turn 3-way ball valve levers 90° to the right so they are
back in line with the direction of ow.
Remove ushing unit.
Ret screw caps on connectors.
Ret upper shell on groundwater station.
Secure the upper shell to the lower shell using the clips
provided.
Check that the insulation is diusion-proof.
GWS | 23
ENGLISH
INSTALLATION
Specication
7. Specication
7.1 Dimensions and connections
Heat exchanger with heat source inlet on left
630
644
188
442
73
110
534
82
548
68
82
548
68
145
145
68
225
d47
d46
f01
f02
d02
d01
D0000017273.ai
d01 Heat pump ow
d02 Heat pump return
d46 Ventilation
d47 Drain
f01 Heat source inlet
f02 Heat source outlet
24 | GWS
INSTALLATION
Specication
Heat exchanger with heat source inlet on right
630
644
188
442
73
110
534
82
548
68
82
548
68
145
145
68
225
d47
d46
f01
f02
d02
d01
D0000017274.ai
d01 Heat pump ow
d02 Heat pump return
d46 Ventilation
d47 Drain
f01 Heat source inlet
f02 Heat source outlet
7.1.1 Flow rate pressure drop diagrams
As there is little divergence, the pressure drop curves in the
diagrams apply to both the heat source and brine sides (eth-
ylene glycol/water mixture with 25 % by vol. ethylene glycol).
GWS 1
0 1 2 3 4
0
100
200
300
400
500
84�03�14�0008�
X Flow rate [m³/h]
Y Pressure drop [hPa]
GWS 2
0 1 2 3 4 5 6 7
0
100
200
300
400
500
600
84�03�14�0009�
X Flow rate [m³/h]
Y Pressure drop [hPa]
GWS | 25
ENGLISH
INSTALLATION
Specication
7.2 Standard circuits
Heat pump WPF M with underoor heating system
WM1-0-1-0-0-0-1
1 Heat pump
2a Outside temperature sensor
2g Heat source sensor
3 Brine circuit pump
3a Heating circuit pump
3.1 Well pump
5 Safety valve
6 Expansion vessel
8 Pressure hose (anti-vibration mount)
10 Drain & ll valve
31 Overow valve
36 Safety temperature sensor for underoor heating system
39 Dirt lter
26 | GWS
INSTALLATION
Specication
Wiring diagram for heat pump WPF M with underoor heating system
E-WM1-0-1-0-0-0-1
GWS | 27
ENGLISH
INSTALLATION
Specication
Heat pump WPF E with underoor heating system
WE1-0-1-0-0-0-1
2 Heat pump manager
2a Outside temperature sensor
3 Brine circuit pump
3a Heating circuit pump
3.1 Well pump
5 Safety valve
6 Expansion vessel
8 Pressure hose (anti-vibration mount)
10 Drain & ll valve
22 Diverter valve
23 Electric emergency/booster heater
31 Overow valve
36 Safety temperature sensor for underoor heating system
39 Dirt lter
28 | GWS
INSTALLATION
Specication
Wiring diagram for heat pump WPF E with underoor heating system
E-WE1-0-1-0-0-0-1
GWS | 29
ENGLISH
INSTALLATION
Specication
7.3 Sizing table
Heat pump type Heat exchanger sizing data Groundwater module Circulation pump
Temperature °C Flow rate m³/h Cooling capacity kW* Δp [hPa]
Heat source
circuit
Brine circuit Heat source
circuit
Brine circuit Heat source
circuit
Brine circuit TYPE Brine circuit
WPF 5 10 > 7 5 < 7 1.7 2.5 5.8 124 280 GWS 1 integrated
WPF 7 10 > 7 5 < 7 2.1 3.1 7.2 192 431 GWS 1 integrated
WPF 10 10 > 7 5 < 7 2.9 4.3 10.0 370 832 GWS 1 integrated
WPF 13 10 > 7 5 < 7 3.6 5.4 12.5 193 433 GWS 2 integrated
WPF 16 10 > 7 5 < 7 4.6 6.9 16.1 319 719 GWS 2 integrated
WPW 7 E SET 10 > 7 5 < 7 1.7 2.5 5.8 124 280 GWS 1 integrated
WPW 10 E SET 10 > 7 5 < 7 2.1 3.1 7.2 192 431 GWS 1 integrated
WPW 13 E SET 10 > 7 5 < 7 2.9 4.3 10.0 370 832 GWS 1 integrated
WPW 18 E SET 10 > 7 5 < 7 3.6 5.4 12.5 193 433 GWS 2 integrated
WPW 22 E SET 10 > 7 5 < 7 4.6 6.9 16.1 319 719 GWS 2 integrated
WPF 5 basic 10 > 7 5 < 7 1.6 2.4 5.6 116 261 GWS 1 UP30/1-8E
WPF 7 basic 10 > 7 5 < 7 2.2 3.3 7.6 214 480 GWS 1 UP30/1-8E
WPF 10 basic 10 > 7 5 < 7 2.8 4.1 9.6 341 767 GWS 1 UP30/1-8E
WPF 13 basic 10 > 7 5 < 7 3.7 5.5 12.9 205 461 GWS 2 UPF40/1-8E
WPF 16 basic 10 > 7 5 < 7 4.5 6.8 15.8 308 692 GWS 2 UPF40/1-8E
WPW 7 basic SET 10 > 7 5 < 7 1.6 2.4 5.6 116 261 GWS 1 UP30/1-8E
WPW 10 basic SET 10 > 7 5 < 7 2.2 3.3 7.6 214 480 GWS 1 UP30/1-8E
WPW 13 basic SET 10 > 7 5 < 7 2.8 4.1 9.6 341 767 GWS 1 UP30/1-8E
WPW 18 basic SET 10 > 7 5 < 7 3.7 5.5 12.9 205 461 GWS 2 UPF40/1-8E
WPW 22 basic SET 10 > 7 5 < 7 4.5 6.8 15.8 308 692 GWS 2 UPF40/1-8E
WPF 10 M 10 > 7 5 < 7 2.8 4.1 9.6 341 767 GWS 1 UP30/1-8E
WPF 13 M 10 > 7 5 < 7 3.7 5.5 12.9 205 461 GWS 2 UPF40/1-8E
WPF 16 M 10 > 7 5 < 7 4.7 7.1 16.5 335 755 GWS 2 UPF40/1-8E
WPF 20 10 > 7 5 < 7 6.2 9.2 21.5 570 1282 GWS 2 UPF40/1-8E
WPF 20 SET 10 > 7 5 < 7 5.5 8.3 19.2 454 1022 GWS 2 UPF40/1-8E
* at B+7 / W+35
7.4 Data table
GWS 1 GWS 2
230659 230660
Application limits
Max. application limit, heat source °C 20 20
Min. application limit, heat source °C 7 7
Max. permissible pressure MPa 0.3 0.3
Dimensions
Height mm 630 630
Width mm 640 640
Depth mm 230 230
Weights
Weight kg 20.5 26.5
Connections
Connection on the heat source side G 1 1/4 G 1 1/4
Heat pump connection 28 mm 28 mm
30 | GWS
GUARANTEE | ENVIRONMENT AND RECYCLING
Guarantee
The guarantee conditions of our German companies do not
apply to appliances acquired outside of Germany. In countries
where our subsidiaries sell our products a guarantee can only
be issued by those subsidiaries. Such guarantee is only grant-
ed if the subsidiary has issued its own terms of guarantee. No
other guarantee will be granted.
We shall not provide any guarantee for appliances acquired in
countries where we have no subsidiary to sell our products.
This will not aect warranties issued by any importers.
Environment and recycling
We would ask you to help protect the environment. After use,
dispose of the various materials in accordance with national
regulations.
GUARANTEE
ENVIRONMENT AND RECYCLING
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