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Antifreeze
Heat pump systems, which cannot be guaranteed to be frostfree,
should be equipped with a drainage option (see Fig.). The anti-
freeze function of the heat pump manager is active whenever the
heat pump manager and the heat circulating pump are ready for
operation. If the heat pump is taken out of service or in the event
of a power failure, the system has to be drained. The heating cir-
cuit should be operated with a suitable antifreeze if heat pump
systems are implemented in buildings where a power failure can
not be detected (holiday home).
7.4 Temperature sensor
The following temperature sensors are already installed or must
be installed additionally:
External temperature sensor (R1) supplied (NTC-2)
Return temperature sensor (R2) installed (NTC-10)
Flow temperature (R9) installed (NTC-10)
www.dimplex.de
7.4.1 Sensor characteristic curves
Temperature in °C
Standard NTC-2 in
k
NTC-10 in k
15
20
2.9
2.4
14.9
12.1
The temperature sensors to be connected to the heat pump
manager must correspond to the sensor characteristic curve
illustrated in Fig.7.1 on pag. 7. The only exception is the external
temperature sensor included in the scope of supply of the heat
pump (see Fig.7.2 on pag. 7)
Fig. 7.1:Sensor characteristic curve NTC-10
Fig. 7.2:Sensor characteristic curve, standardised NTC-2 ac-
cording to DIN 44574
External temperature sensor
7.4.2 Mounting the external temperature
sensor
The temperature sensor must be mounted in such a way that all
weather conditions are taken into consideration and the
measured value is not falsified.
Mount on the external wall on the north or north-west side
where possible
Do not install in a "sheltered position" (e.g. in a wall niche or
under a balcony)
Not in the vicinity of windows, doors, exhaust air vents,
external lighting or heat pumps
Not to be exposed to direct sunlight at any time of year
Sensor lead: Max. length 40 m; min. core cross-section
0.75 mm²; external diameter of the cable 4-8 mm.
452165.66.01 · FD 9502
-20
-15
-10
-5
14.6
11.4
8.9
7.1
67.7
53.4
42.3
33.9
25
30
35
40
45
2.0
1.7
1.4
1.1
1.0
10.0
8.4
7.0
5.9
5.0
LIH 10TE
0
5
10
5.6
4.5
3.7
27.3
22.1
18.0
50
55
60
0.8
0.7
0.6
4.2
3.6
3.1
EN-7
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