34
AW HT
GB 05/2009
HEATING CIRCUIT
Direct heating circuit
The heat pump is connected directly to the heating circuit (radiant panels, radiators, fan coils). The temperature is controlled by
starting and stopping the heat pump.
ROOM TEMPERATURE SET POINT CONTROL
Parameter
number
Description
The room temperature can be controlled based on different set points, which are active according
to the operating conditions selected by button 1, see the paragraph "operation and functions of
the room unit using the buttons".
This allows different levels of temperature in the room.
The range of set points is shown in the following diagram.
Set the following parameters to select the desired room temperature set point:
Comfort set point in heating
Reduced set point in heating (economy)
Room frost protection set point
Maximum comfort set point (“OEM level” default setting)
Default setting
710 = 20°C
712 = 18°C
714 = 8°C
716 = 26°C
(Engineer level)
710
712
714
716
Parameters contained on the HEATING CIRCUIT 1 operating page
TRKmax Maximum comfort set point
TRK Comfort
set
point
TRR Reduced
set
point
TRF
Frost protection set point
0 2 4 6 8 10 12 14 16 18 20 22 24 26
°C
TRK
TRR
TRF
TRKmax
INFLUENCE OF THE ROOM TEMPERATURE
Parameter
number
Description
The room unit is fitted with a sensor for measuring the room temperature. Parameter 750 is used to select
the influence of the room temperature on the calculation of the heating curve.
a 750= - - - % the room temperature is not used for the calculation of the heating curve.
The outlet temperature is calculated by the heating curve based solely on the outside temperature.
b) 750= 100% the outlet temperature is calculated based on the room temperature set point.
The outside air temperature has no influence. A slight increase in the room temperature brings an immedi-
ate decrease in the outlet temperature.
c) 750= 1…99% The value of the room temperature is used in the calculation of the outlet temperature.
The heating curve selected by parameter 720 will be shifted along an axis in parallel and consequently the
outlet temperature will be different
The better the reference room temperature (suitable choice of the room and positioning of the room unit), the
more readily the room temperature will be satisfied.
Example:
- If a value of around 60 % is selected for parameter 750, this indicates a reference room temperature and
good positioning of the room unit.
- If a value of around 20 % is selected for parameter 750, this indicates a less-than-perfect reference room
temperature and poor positioning of the room unit.
For settings b) and c) there must not be thermostatic valves in the reference room (the same where the room
unit is located). If these are present, they must be opened completely.
Default setting
750= - - -%
750
Parameters contained on the HEATING CIRCUIT 1 operating page
W
ater outlet temperature
Outside air temperature
20
10
0
-10
-5
-20
-30
90
80
70
60
50
40
30
°C
°C
°C
100
10
0
30
55
45
1,5
1,5
Room
temperature
(Enduser level)
(Engineer level)
