Connection With Hydraulic Connection Set; Installing The Contact Humidistat 24 V - Viessmann NC-Box Installation And Service Instructions For Contractors

Installation sequence
Hydraulic connection

Connection with hydraulic connection set

Fig.4

Installing the contact humidistat 24 V

The contact humidistat monitors the formation of con-
densate on the flow of the heating/cooling circuit or of
the separate cooling circuit.
Where the heating/cooling circuit extends over sev-
■
eral rooms with different relative humidity levels, it
may become necessary to provide several contact
humidistats.
■ Where several contact humidistats are used, connect
all contact humidistats electrically in series.
■ In the delivered condition, the contact humidistat
switches at a relative humidity of 80 %. This value
can be adjusted.
Contact humidistat installation instructions
10
(cont.)
1.
A
B
C
2.
–
Tightening torques for fitting the union nuts
Line
Primary circuit flow (heat
A
pump brine inlet)
Secondary circuit flow B
Secondary circuit return
C
Note
In the delivered condition, the contact humidistat is
located outside the NC-Box casing and is electrically
connected at the control panel. The associated con-
necting cable is routed through the cable entry in the
NC-Box.
Installation conditions: The flow and return of the heat-
ing/cooling circuit or the separate cooling circuit are
connected to the NC-Box.
Connection to
Heat NC-Box
pump
70 Nm 70 Nm
70 Nm 50 Nm
70 Nm 50 Nm