Viessmann NC-Box - Connection with Hydraulic Connection Set; Tightening Torques; Installing the Contact Humidistat

10
Connection with hydraulic connection set
A
B
C
1.
2.
Fig.4
Tightening torques for fitting the union nuts
Line Connection to
Heat
pump
NC-Box
Primary circuit flow
A
(heat
pump brine inlet)
70 Nm 70 Nm
Secondary circuit flow
B
70 Nm 50 Nm
Secondary circuit return
C
70 Nm 50 Nm
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
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.
Installation sequence
Hydraulic connection (cont.)
5675 869 GB
Installation