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Cooling circuit 2 → 5/11 → 1223
Output water min set point/ET 35 °C
This setting defines the lowest permissible output water temper-
ature at a mixed outdoor temperature of 35°C.
If an acceptable outdoor temperature value is not available, the
controller will use the setting of parameter "Output water min
set point/ET 35°C".
Factory setting: 18°C
Menu: Expert → Parameter list
Cooling circuit 1 → 5/11 → 924
Cooling circuit 2 → 5/11 → 1224
ROOM SENSOR EFFECT
If a room temperature sensor is used in the system, the controller
can be defined a room compensation effect.
Room effect:
The more the room temperature is wished to effect the cooling's
output water temperature, the higher the set point is determined.
Adjustment range: 0 – 100%
Factory setting: 80%
Menu: Expert → Parameter list
Cooling circuit 1 → 6/11 → 928
Cooling circuit 2 → 6/11 → 1228
12.9 Heat pump settings
CHARGING PUMP'S SPEED LIMITS
The heat pump's charging pump (Q9 / LP) is speed controlled.
When the compressor is running, the pump operates between the
minimum and maximum rotation figures, keeping the charging
temperature difference at the set point. This function enables the
heat pump to work at the best possible efficiency.
The pump also rotates when the compressor is off, in this case
the controller drives the pump at the minimum rotation speed.
When setting the pump's rotation speed, the heat pump's model-
specific minimum flow must be taken into account. The charging
flow must not be lower than the heat pump's minimum flow.
This may cause functional failures in the device. Refer to section
Technical specifications for model-specific minimum flows.
Menu: Expert → Parameter list
Heat pump → 3/23 → 2792 minimum rotation figure
v1-6 29082018
Heat pump → 3/23 → 2793 maximum rotation figure
Pump's minimum rotation figure, 2792:
Permitted adjustment range: 40-70%
Factory setting: 50%
Pump's maximum rotation figure, 2793:
Permitted adjustment range: 70-100%
Factory setting: 100%
NOTE! When reducing the maximum rotation figure, use a flow
meter to check the minimum flow at the charging line control
valve.
RETURN WATER SWITCHING DIFFERENTIAL
With this set point the values of the heat pump start-up limits are
defined in return water controlled system. By return water con-
trolled system is meant a facility where there are no heating res-
ervoir measurements. This setting does not affect systems, which
have heating reservoir measurements.
The compressor switches on and off according to the return wa-
ter temperature (B71) and the return water temperature switch-
ing differential.
By increasing the set point, the compressor runs for a
longer operating period in heating mode.
By lowering the set point, the compressor runs for a
shorter operating period in heating mode.
Menu: Expert → Parameter list
Heat pump → 9/23 → 2840 Return water temp. connection dif-
ference
Adjustment range: 1°C - 20°C
Factory setting: 6°C
2840
Return temperature switching difference
OFF
Switching off point
ON
Switching on point
37
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