Section 8: Operation Page 41
ON/OFF remote contact
Contact OPEN = HP unit OFF
Contact CLOSE = HP unit ON
20
21
Terminal PCB
ON/OFF
or
EHS Alarm
8.6 ON/OFF Heating Remote Contact
The heat pump operation for heating is controlled from a remote
contact, e.g. an external programmer, motorised valves and/or a
room thermostat.
The ON/OFF heating contact is enabled by parameter 5120. Refer to
Table 8-22.
The heating operation cannot be automatically controlled by the
remote controller.
Heat pump will be turned ON/OFF according to remote contact.
For heating operation, both the remote controller and remote contact
must be ON. If remote contact is turned OFF, then the heating will be
turned OFF as well. Refer to Table 8-23.
If the remote controller is turned OFF, then the heat pump will be
turned OFF.
Figure 8-21: ON/OFF heating remote contact
Table 8-22: Heating ON/OFF contact parameters
Level
Parameter
Function description
Display and input value
Remarks
Group Code Default Min. Max. Unit
I 51 20
Terminal 20-21 : ON/OFF remote contact input
0=disable (Remote controller only)
1=ON/OFF remote contact
1 0 2 -
ON/OFF by
Remote controller
0=enable
1= On/Off enable
2= enable
For details of how to access the parameter settings, refer to Section 9.3.
Table 8-23: Remote controller / remote contact operation
Remote controller connected Heat pump unit status
Remote controller Remote contact Heat pump Heating
ON ON
→
ON ON
ON OFF
→
ON* OFF
OFF ON
→
OFF OFF
OFF OFF
→
OFF OFF
* Heat pump will be on standby or could be operating for DHW production
The frost protection is active even when the heat pump is
switched OFF from the ON/OFF (heating) remote contact.
NOTE
!
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