Temperature Sensor - Dimplex Lih 10Te Montage- Und Gebrauchsanweisung

English
Minimum heating water 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 either a
dual differential pressureless manifold or an overflow valve. The
procedure for setting an overflow valve is described in the
chapter "Start-up". When the minimum heating water flow rate
is undershot, the plate heat exchanger in the refrigeration cir-
cuit can freeze, which can lead to total loss of the heat pump.
The nominal flow rate is specified depending on the max. flow
temperature in the device information and must be taken into
account during planning. With design temperatures below 30 C
in the flow, the design must be based on the max. volume flow
with 5 K spread for A7/W35.
The specified nominal flow rate (See "Device information" on
page 14) must be guaranteed in every operating status. An in-
stalled flow rate switch is used only for switching off the heat
pump in the event of an unusual and abrupt drop in the heating
water flow rate and not to monitor and safeguard the nominal
flow rate.
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.
Antifreeze
Heat pump systems, which cannot be guaranteed to be frost-
free, should be equipped with a drainage option (see Fig.). The
antifreeze function of the heat pump manager is active when-
ever 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 circuit should be operated with a suitable anti-
freeze 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)

EN-8
7.4.1 Sensor characteristic curves
Temperature in °C
Standard NTC-2 in k 14.6
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 on pag. 8. The only exception is the external
temperature sensor included in the scope of supply of the heat
pump (see Fig.7.3 on pag. 8)
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, standardised NTC-2 according to
DIN 44574 External temperature sensor
452165.66.01 · FD 9912
-20 -15 -10
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
External temperature in [°C]
LIH 10TE
-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
30 35 40 45 50 55 60
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