Connection On Heat Source Side; Temperature Sensor - Dimplex SIH 20TE Installation And Operating Instruction

SIH 20TE
Heating water minimum flow rate
The minimum heating water flow rate through the heat pump
must be assured in all operating states of the heating system.
This can be accomplished, for example, by installing a dual dif-
ferential pressureless manifold.
NOTE
The use of an overflow valve is only recommended for panel
heating and a max. heating water flow of 1.3 m³/h. System
faults may result if this is not observed.
Provided the heat pump manager and heating circulating
pumps are ready for operation, the frost protection feature of
the heat pump manager is active. If the heat pump is taken out
of service or in the event of a power failure, the system has to be
drained. In heat pump installations where a power failure can-
not be readily detected (holiday house), the heating circuit must
contain a suitable antifreeze product.
7.3 Connection on Heat Source
Side
The following procedure must be observed when making the
connection:
Connect the brine line to the flow and return pipe heat source
of the heat pump.
The hydraulic integration diagram must be observed here.
ATTENTION!
The supplied strainer must be fitted in the heat source inlet of
the heat pump in order to protect the evaporator against the
ingress of impurities.
The brine liquid must be produced prior to charging the system.
The brine concentration must be at least 25 %. Freeze protec-
tion down to -14°C can thus be ensured.
Only antifreeze products on the basis of mono-ethylene glycol
or propylene glycol may be used.
The heat source system must be vented (de-aerated) and
checked for leaks.
ATTENTION!
The brine solution must contain at least 25 % of an antifreeze
agent on a mono-ethylene glycol or propylene glycol basis
and must be mixed prior to filling.
NOTE
A suitable de-aerator (micro bubble air separator) must be
installed in the heat source circuit by the customer.

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 secondary circuit (R2) installed (NTC-

10)
Flow temperature secondary circuit (R9) installed (NTC-10)

Flow temperature primary circuit (R6) installed (NTC-10)

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7.4.1 Sensor characteristic curves
Temperature in °C
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. 7.2. The only exception is the external
temperature sensor included in the scope of supply of the heat
pump (see Fig. 7.3)
70
60
50
40
30
20
10
0
-20 -15
Fig. 7.2:Sensor characteristic curve NTC-10
20
18
16
14
12
10
8
6
4
2
0
-20 -15
Fig. 7.3:Sensor characteristic curve, NTC-2 according to DIN 44574 Ex-
ternal temperature sensor
452234.66.77 · FD 9912
-20 -15 -10
14.6 11.4 8.9
67.7 53.4 42.3
25 30 35 40
2.0 1.7 1.4 1.1
10.0 8.4 7.0 5.9
-10 -5 0 5 10 15 20 25
External temperature in [°C]
-10 -5 0 5 10 15 20 25 30
External temperature in [°C]
English
-5 0 5 10
7.1 5.6 4.5 3.7
33.9 27.3 22.1 18.0
45 50 55 60
1.0 0.8 0.7 0.6
5.0 4.2 3.6 3.1
30 35 40 45 50 55 60
35 40 45 50 55 60
EN-7