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12.1.3 High limit safety cut-out
At ambient temperatures below -15°C it is possible that the high
limit safety cut-out of the electric emergency/booster heater may
trip.
Check whether the high limit safety cut-out has tripped.
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1 Electric emergency/booster heater
Remove the cause of the fault.
D0000035383
Reset the high limit safety cut-out by pressing the reset
button.
12.1.4 Power supply
- Have you correctly connected the power supply?
12.2 Using the appliance with an external second
heat generator
The appliance is factory set for compressor operation with an elec-
tric emergency/booster heater. If the appliance is operated in dual
mode with an external second heat generator, set the DIP switch
to compressor mode with an external second heat generator (see
chapter "Troubleshooting/ Checking the IWS DIP switch settings").
12.3 Initial start-up
12.3.1 Heating curve adjustment
The efficiency of a heat pump decreases as the flow temperature
rises. The heating curve should therefore be adjusted with care.
Heating curves that are set too high cause the zone valves or ther-
mostatic valves to close, which may lead to the minimum flow rate
required for the heating circuit not being achieved.
Observe the instructions for the WPM.
The following steps will help you to adjust the heating curve cor-
rectly:
- Fully open thermostatic or zone valves in a lead room (e.g.
living room and bathroom).
We do not recommend installing thermostatic or zone valves
in the lead room. Control the temperature for these rooms
via a remote control.
- At different outside temperatures (e.g. –10°C and +10°C),
adjust the heating curve so that the required temperature is
set in the lead room.
Standard values to begin with:
Parameter
Heating curve 0.4 0.8
Control response time 25 50
Comfort temperature 21°C 23°C
If the room temperature is too low in spring and autumn (ap-
prox. 10°C outside temperature), go to heat pump manager menu
SETTINGS / HEATING / HEATING CIRCUIT and raise the parameter
COMFORT TEMPERATURE”.
Note
If no remote control is installed, raising the "COMFORT
TEMPERATURE" parameter will lead to a parallel offset
of the heating curve.
If the room temperature is too low at low outside temperatures,
increase parameter "HEATING CURVE".
If the "HEATING CURVE" parameter has been raised and outside
temperatures relatively high, adjust the zone valve or thermostatic
valve in the lead room to the required temperature.
!
Material losses
Never reduce the temperature in the entire building by
closing all zone or thermostatic valves; instead use the
setback programs.
When everything has been implemented correctly, the system
can be heated to its maximum operating temperature and vented
once again.
!
Material losses
For underfloor heating systems, observe the maximum
permissible system temperature for that particular un-
derfloor heating.
12.3.2 Other settings
For operation with or without a buffer cylinder, observe the
information in the instructions for the WPM and param-
eter BUFFER OPERATION in menu SETTINGS/ STANDARD
SETTING.
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