35
Terminals
Function
Explanation
21X5
Groundwater/cold water flow switch
■
Contact closed:
Heat pump running
■
Contact open:
Heat pump not running
No
jumper should be installed if a flow switch is con-
nected.
Note
The following connections are not potential-free.
38X4
External fault message, dry cooler
■
Contact closed:
Dry cooler fault
■
Contact open:
Dry cooler OK
19X0
Optional heat pump emergency stop
switch
■
Contact closed:
Heat pump running
■
Contact open:
Heat pump not running
No
jumper should be installed if a flow switch is con-
nected.
19X2
Power supply utility control
Power-OFF and low tariffs
19X4
External multi stage enabling, input 1
Function depends on the configuration
■
For complete third party control without set value:
External demand 1
■
For all other configurations:
Multi stage enabling, input 1 (one stage)
19X6
External multi stage enabling, input 2
Function depends on the configuration
■
For complete third party control without set value:
External demand 2
■
For all other configurations:
Multi stage enabling, input 2 (2 further stages)
SPS operating instructions for contractors
Further properties under third party control de-
scription: including power demand signal from
an external system (e.g. swimming pool heat-
ing)
19x8
External set value changeover
or
External operating mode changeover
Function depends on the configuration
■
For third party control:
Changeover command, cooling/heating
■
For all other configurations:
Set value input changeover for cooling/heating
■
Contact closed: cooling
■
Contact open: heating
External demand 1+2
Terminal 19x4,
1+2
Terminal 19x6,
1+2
Description
Open
Open
Not enabled
Closed
Open
Enable 1 stage
Open
Closed
Enable 2 stages
Installation sequence
Electrical connections
(cont.)
5789 986 GB
Installation
