INSTALLATIoN
Installation
20 | 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-fitted to the ground
source heat pump.
f
Make the brine pressure switch electrical connections ac-
cording to the wiring diagram in chapter "Specification".
You can obtain a suitable brine pressure switch via your con-
tractor or from us as an accessory.
3.2.4 Fitting the push-fit connectors
Note
The plastic push-fit connectors are not suitable for
installation in the DHW line.
f
only install the push-fit connectors in the heating
or brine circuits.
!
Material losses
Tighten the screw cap of the push-fit connector by
hand. Never use a tool.
Material losses
To ensure the push-fit connector is held securely, pipes
with a surface hardness > 225 HV (e.g. stainless steel)
must have a groove.
f
Using a pipe cutter, cut a groove (depth ap-
prox. 0.1 mm) at a defined distance from the end
of the pipe.
- Pipe diameter 22 mm: 17±0.5 mm
- Pipe diameter 28 mm: 27.5±0.5 mm
Push-fit connectors are fitted to the brine circuit connections
to make it easier to connect to the heat pump.
How the push-fit connectors work
The push-fit connectors are equipped with a retainer with
stainless steel serrations and an o-ring for sealing. The push-
fit connectors also have a “twist and secure” function. Simply
turning the screw cap by hand will secure the pipe in the con-
nector and push the o-ring against the pipe to seal it.
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 main body.
D
00000
88
51
9
1
2
3
4
1 Retainer
2 Screw cap
3 Gap between screw cap and main body
4 Main body
D
00000
88
52
0
Pipe Ø
28 mm
Depth of insertion A
44 mm
!
Material losses
Pipe ends must be deburred.
f
Always use a pipe cutter to trim pipes.
f
Push the pipe past the o-ring into the push-fit connector
until it reaches the prescribed insertion depth.
f
Tighten the screw cap by hand against main body as far as
it will go. This secures the push-fit connection.
Releasing the connection
If the push-fit connectors later need to be undone, proceed
as follows:
f
Turn the screw cap anti-clockwise until there is a narrow
gap of approx. 2 mm. Press the retainer back with your
fingers and hold on to it.
f
Pull out the inserted pipe
D
00000
88
52
1
3.3 Installing the heat source system
f
Size the heat source circuit pump (well pump) for the heat
source system according to the system-specific conditions
(see chapter "Specification / Sizing table").
!
Material losses
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 "Specification / Standard cir-
cuits").
f
Install a non-return valve above the source circuit pump.
f
Fill the heat source system. Make sure there are no leaks.
