Mounting The External Temperature Sensor; Installing The Strap-On Sensor - Dimplex Si 8Tu Montageanleitung

7.4
7.4 Temperature sensor
The following temperature sensors are already installed or must
be installed additionally:
External temperature (R1)
Temperature 1st, 2nd and 3rd heating circuit
(R2, R5 and R13)
Flow temperature, heating circuit (R9)
Hot water temperature (R3)
Temperature of renewable heat accumulator (R13)
Flow and return temperature, primary circuit (R6, R24)
7.4.1 Sensor characteristic curves
Temperature in °C -20 -15
Standard NTC-2 in kΩ 14.6 11.4
NTC-10 in kΩ 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 ma-
nager must correspond to the sensor characteristic curve illustra-
ted in Fig.7.1 on pag. 6. The only exception is the external tem-
perature sensor included in the scope of supply of the heat pump
(see Fig.7.2 on pag. 6)
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
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
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 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.

7.4.3 Installing the strap-on sensor

It is only necessary to mount the strap-on sensors if they are in-
cluded in the scope of supply of the heat pump but have not yet
been installed.
The strap-on sensors can be fitted as pipe-mounted sensors or
installed in the immersion sleeve of the compact manifold.
Mounting as a pipe-mounted sensor
Remove paint, rust and scale from heating pipe.
Coat the cleaned surface with heat transfer compound
(apply sparingly).
Attach the sensor with a hose clip (tighten firmly, as loose
sensors can cause malfunctions) and thermally insulate.