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ENG

“SmartCella 3PH” +0500119IE - rel. 1.3 - 21.11.2019

1.12.3 Connections for simultaneous compressor and

solenoid valve activation

If shutdown simultaneous compressor and solenoid valve activation

and deactivation are required, without using a pressure switch, the

connections are as shown in the following diagram

liquid valve

bridge

Fig. 1.u

In this conﬁ guration, when there is no cooling request (Sv<St), the

deactivated valve (terminals 105-104) and the compressor (KM2) are oﬀ

simultaneously

Fig. 1.v

Note: do not enable pump down on Smartcella 3PH (check that

c7=0, H1≠5).

1.12.4 Connections for pump down by time

If solenoid valve needs to be activated and deactivated by time, without

using a pressure switch, the connections are as shown in the following

diagram

liquid valve

bridge

Fig. 1.w

On Smartcella 3PH conﬁ gure:

• H1=5 (aux1 output, terminals 110-111, for pump down valve)

• C10=1 (pump down by time)

• C7>0 (pump down time)

In this conﬁ guration, when there is no cooling request (Sv<St), the

solenoid valve relay (terminals 110-111, AUX1 output on Smartcella)

opens, while the compressor (KM2) operates for the time deﬁ ned by

parameter C7

Fig. 1.x

Carel SmartCella 3PH Quick Guide

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