Bedienungsanleitung Dimplex LA 33TPR (Seite 37 von 76) (Deutsch, Englisch, Französisch)

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www.glendimplex.de 452166.66.14 · FD 0008 EN-13

LA 33TPR 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 a dual dif-

ferential pressureless manifold.

CAUTION!

When the minimum heating water flow rate is undershot, the

plate heat exchanger in the refrigeration circuit 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 (Cap. 13 on page 18) must be

assured in all operating states. An installed flow rate sensor is

used only for switching off the heat pump in the event of an un-

usual and abrupt drop in the heating water flow rate and not to

monitor and safeguard the nominal flow rate.

Frost protection

On heat pump systems where protection from frost cannot be

guaranteed, there must be an option for draining the system

(see figure). The frost protection function of the heat pump

manager is active whenever the heat pump manager and the

heat circulating pump are ready for operation. When decom-

missioning the heat pump, or in the event of a power failure, the

system must be drained through the indicated points (see illus-

tration); it may be necessary to purge the system with com-

pressed air. The heating circuit should be operated with a suita-

ble frost protection if heat pump systems are implemented in

buildings where a power failure cannot be detected (holiday

home).

7.4 Temperature sensor

The following temperature sensors are already installed or must

be installed additionally:

Outside temperature (R1) supplied (NTC-2)

Return temperature, secondary circuit (R2) installed

(NTC-10)

Flow temperature in secondary circuit (PT 1000) integrated

in flow rate sensor (R3.1)

7.4.1 Sensor characteristic curves

The temperature sensors to be connected to the heat pump

manager (controller -N1) must correspond to the sensor char-

acteristic curve illustrated in Fig. 7.2 on page 13. The only ex-

ception is the outside temperature sensor included in the scope

of supply of the heat pump (see Fig. 7.3 on page 13)

Fig. 7.2:Sensor characteristic curve NTC-10

Fig. 7.3:Sensor characteristic curve NTC-2 according to DIN 50350 Out-

side temperature sensor

Temperature in °C -20 -15 -10 -5 0 5 10

NTC-2 in k14.6 11.4 8.9 7.1 5.6 4.5 3.7

NTC-10 in k67.7 53.4 42.3 33.9 27.3 22.1 18.0

15 20 25 30 35 40 45 50 55 60

2.9 2.4 2.0 1.7 1.4 1.1 1.0 0.8 0.7 0.6

14.9 12.1 10.0 8.4 7.0 5.9 5.0 4.2 3.6 3.1

-20-15-10-5 0 5 1015202530354045505560

External temperature in [°C]

Resistance value in [kOhm]

-20-15-10-5 0 5 1015202530354045505560

External temperature in [°C]

Resistance value in [kOhm]

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