Viessmann AC-Box Installation And Service Instructions For Contractors page 14

Installation sequence
Electrical connection
Inserting and routing cables
For the additional components, use the two cable
entries which are still available at the back of the AC-
Box.
1.
Fig.6
A Additional frost stat 230 V~ (accessories)
Contact humidistat 24 V
B
1. Remove the dummy plugs, insert cables and apply
threaded strain relief fittings (on site).
2. Secure the cables with cable ties to the holes at the
top of the angled panel.
14
(cont.)
(accessories)
–
2.
3.
A B
3. Route cables into the terminal box, apply strain
relief fittings and connect:
■ Connect the cable of the additional frost stat to
plug on the AC-Box PCB: See page 18.
aBAB
Remove the jumper from plug
Connect the 24 V
■
across terminals X4.1 and X4.2 on the AC-Box
PCB: See page 18. Remove the jumper from
plug .
aBAC
.
aBAB
contact humidistat cable
–