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T0[°C]
1
75
70
65
60
55
45
35
25
15
10
-30
-20
-10
0
Fig. 4
Heat pump in heating mode without booster heater
[1]
Flow temperature (T0)
[2]
Outdoor temperature (T1)
2.3.2
Generic overview of the refrigerant circuit
75 %
+2 °C
–2 °C
1
Fig. 6
Functional principle of the refrigerant circuit in the heat pump
[1]
Evaporator
[2]
Compressor
[3]
Condenser
[4]
Expansion valve
2.4
Indoor unit
The task of the indoor unit is to distribute the heat from the heat pump to
the heating system and the hot water cylinder. The circulation pump in
the indoor unit module is RPM controlled, and will automatically
decrease in speed when demand is low. This decreases energy
consumption. When the heating demand is higher during cold outdoor
temperatures, an additional heat source - a booster - may be required.
This booster heater is integrated, an its on/off is controlled by the user
interface in the indoor unit. Please note that when the heat pump is
running, the booster heater will only provide the heating output that the
heat pump cannot produce itself. When the heat pump is able to provide
all the heating needed, the booster is automatically turned off.
Compress 5800iAW 12 E | OR-S | T – 6721871228 (2023/06)
10
20
30
40
50
T1[°C]
2
0010038451-003
0 °C
–4,5 °C
T0[°C]
1
30
25
20
15
10
7
5
15
20
Fig. 5
Heat pump in cooling mode
[1]
Flow temperature (T0)
[2]
Outdoor temperature (T1)
25 %
2
88 °C
4
Compress 5800i 12 E
When heat pump AW OR is connected to indoor unit Compress 5800i 12
E, an external domestic hot water cylinder is required if the purpose of
the heat pump is also to produce domestic hot water (DHW). In this case,
switching between heating and DHW is managed by an internal 3-way
valve. The integrated booster in the indoor unit will turn on if needed.
Product description
25
30
35
40
45
100 %
+27 °C
3
50 °C
T1[°C]
2
0010041081-002
+35 °C
5
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