Viessmann AC-Box - Additional Connections

12
The free ends have been stripped of their insulation
and have wire ferrules fitted and are therefore ready
for connection.
Existing connecting cables
Designation Function Internal connec-
tion, plug
Page
"NC signal" Switching signal 230 V~ for switching the AC-Box for the natu-
ral cooling function
aMA
D
16
"AC signal" Switching signal 230 V~ for switching the AC-Box for the ac-
tive cooling function
aMA
E
16
"SC"
■
Shutdown signal for heat pump if safety equipment has re-
sponded, e. g. contact humidistat 24 V– and/or frost stat
■
The shutdown signal is part of the heat pump safety chain.
aMG
16
"Mains" Power supply 1/N/PE 230 V/50 Hz
fÖ
19
Additional connections
To connect the following components, insert the con-
necting cables into the AC-Box, where they must be
routed accordingly:
■
Contact humidistat 24 V– (accessories)
■
Additional frost stat (accessories)
Installation sequence
Electrical connection (cont.)
5675 895 GB
Installation