Viessmann NC-Box Installation And Service Instructions For Contractors page 11

Hydraulic connection
1.
Fig.5
Flow, heating/cooling circuit or separate cooling
A
circuit
Contact humidistat 24 V
B
Terminal box
C
Power cable and heat pump connecting cable (NC
D
signal)
(cont.)
–
Panel with cable entries
E
Contact humidistat connecting cable
F
1. Fit the contact humidistat above the NC-Box to the
flow of the heating/cooling circuit or the separate
cooling circuit. If necessary remove parts of the
thermal installation in order to provide direct contact
with the pipe.
2. Thermally insulate all lines on site with vapour diffu-
sion-proof material. Thermally insulate the pipe
joints and the area around the contact humidistat
with vapour diffusion-proof adhesive tape.
Installation sequence
11