Viessmann Vitocal 222-S Installation And Service Instructions For Contractors page 32

Installation sequence
Type AWBT(-M)-E-AC only: Connecting the cooling circuit
Requirements for the contact humidistat:
■ Electrical connection, subject to the type of contact
humidistat:
– 230 V~, 0.5 A:
Connection to X3.8/3.9 on the luster terminals
24 V :
– –
Connection to F11 on the controller and sensor
PCB
■ Installation inside the room to be cooled at the cool-
ing water flow (remove thermal insulation if required)
■ If several rooms with different relative humidity levels
are part of the cooling circuit, fit and connect several
contact humidistats in series:
Design the switching contacts as N/C contacts.
Removing the front panels
5.
3.
Fig. 28
32
2x
1.
(cont.)
4.
2.