Electrical installation
Installation instructions geoTHERM 0020051574_04
55
7
7.3.8
Connecting external brine switch (VWS
only)
1
2 N PE
L3 L2 L1
N
PE
L3 L2 L1
N
PE
L
N
PE
L
N
PE
L3
N
PE
L2 L1
L3
N
S
S
1
p
2
7.16 Connecting an external brine switch (VWS only)
Key
p
Brine Switch
In some cases (for example, in drinking water protection
areas), local authorities prescribe how an external brine
switch must be installed (VWS only) and the refrigerant cir-
cuit is switched off if the pressure in the brine circuit
exceeds a certain level.
If there is a lock-out due to the brine switch, the controller
displays the error message 91 (
¬
Ch. 11.5
).
>
Remove the bypass pipework (dashed line) (
2
).
>
Connect an external brine switch to the terminals (
1
).