Gebwell Qi 10, Installation, Operation And Maintenance Manual

Page: 35 / 64

Gebwell Qi Installation, operation, and maintenance manual
35
NOTE! When using a pump mixing circuit (not mixing
valve), the maximum set point is to be set in menu
Parameter list
→
Heating pump
→
11/23
→
2855
”Maximum switch-of-temperature heating”. As flow
sensor B21 measurement reaches the value set on 2855,
the compressor comes to a halt.
NOTE!! The minimum set point for the supply water can
be increased if the building’s underfloor heating is
intended to be on in summertime. For this feature, you
must take the “Summer/winter heating limit” into
account.
The room sensor effect
If a room sensor is installed with the heat pump, the
compensatory effect can be adjusted on this control row.
Row number Control row
Factory
setting
HC1 HC2
750 1050 Room effect 20%
Setting Compensatory way
--- Plain outdoor temperature compensation
1…99%
Outdoor temperature compensation and
room effect
100% Plain room influence
Plain outdoor temperature compensation:
The supply water temperature is calculated via the heating
curve of the outdoor temperature. This compensation
requires that the heating curve is set correctly.
Outdoor temperature and room effect:
The system measures the room temperature deviation
from a set point and takes it into account in temperature
control. This way the free-heat can be taken into account
and a more accurate room temperature control can be
achieved.
Plain room effect:
The supply water temperature is set according to the room
temperature set point, the current room temperature and
the changes in the room temperature. For example, a small
rise in the room temperature immediately results in
lowering the supply water temperature.
11.6 Settings for the compressor functions
NOTE! This menu may only be used to change the
control rows advised in this manual. Changing the
other values may cause incorrect functions resulting in
equipment malfunction.
Menu: Heat Pump
The heat supply pump speed
The heat supply pump speed settings are not to be made
any changes to, unless the heating network requires it. If
you have a radiator network, the network flow can be too
high, resulting to cause sound in the network. In this case
the minimum pump speed should be lowered. The table
below shows the allowed setting ranges.
The heat supply pump runs within the scope of the
minimum and maximum speed, keeping the temperature
difference in the condenser at the right level.
During the heating season when the compressor is off, the
heat supply pump runs at the set minimum speed.
Electrical resistance control being enabled, the heat
supply pump runs at the maximum speed.
Row
number
Control row
Factory
setting
Allowed
control
range
2792
Pump speed
minimum
60% 40-60%
2793
Pump speed
maximum
100% 80-100%
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 controlled system is meant a facility where
there are no heating accumulator measurements.
The compressor switches on and off according to the
return water temperature (B71) and the return water
temperature switching 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.
Factory setting: 6°C
Allowed adjustment range: 4 - 20°C