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SIH 90TU
7.3 Heat source connection
The following procedure must be observed when making the
connection:
Connect the brine pipe to the heat source flow and return of the
heat pump.
The hydraulic integration diagram must be adhered to.
ATTENTION!
The supplied dirt trap must be inserted in the heat source inlet of the heat
pump to protect the evaporator against the ingress of impurities.
The brine must be produced prior to charging the system. The
brine concentration must be at least 25 %. This guarantees frost
protection up to approx. -14 °C.
Only monoethylene glycol or propylene glycol-based antifreeze
may be used.
The heat source system must be de-aerated and checked for
leaks.
ATTENTION!
The brine must contain at least a 25 % concentration of a monoethylene
glycol or propylene glycol-based antifreeze, which must be mixed before
filling.
ATTENTION!
A suitable de-aerator (micro bubble air separator) must be installed in
theheat source circuit by the customer.
7.4 Temperature sensor
The following temperature sensors are already installed or must
be installed additionally:
Outside temperature sensor (R1) supplied (NTC-2)
Return temperature heating circuit (R2) installed (NTC-10)
Return temperature primary circuit (R24) installed (NTC-10)
Flow temperature heating circuit (R9) installed (NTC-10)
Flow temperature primary circuit (R6) installed (NTC-10)
7.4.1 Sensor characteristic curves
Temperature in °C
-20
-15
NTC-2 in k
14,6
11,4
NTC-10 in k
67,7
53,4
15
20
25
30
35
2,9
2,4
2,0
1,7
1,4
14,9
12,1
10,0
8,4
7,0
The temperature sensors to be connected to the heat pump man-
ager must correspond to the sensor characteristic curve illus-
trated in Fig.7.1. The only exception is the outside temperature
sensor included in the scope of supply of the heat pump (see
Fig.7.2)
EN-6
-10
-5
0
5
10
8,9
7,1
5,6
4,5
3,7
42,3
33,9
27,3
22,1
18,0
40
45
50
55
60
1,1
1,0
0,8
0,7
0,6
5,9
5,0
4,2
3,6
3,1
452234.66.54 · FD 9401
Fig. 7.1: Sensor characteristic curve NTC-10
Fig. 7.2: Sensor characteristic curve NTC-2 according to
DIN 44574 Outside temperature sensor
7.4.2 Mounting the outside
temperature sensor
The temperature sensor must be mounted in such a way that all
weather conditions are taken into consideration and the meas-
ured value is not falsified.
On the external wall of a heated room used as living space,
if possible on the north or north-west side of the building
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, ex-
ternal 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.
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