Viessmann 2731708 Instrucciones De Montaje página 13

Connecting to the Vitotronic control unit
Opening the heat pump
Isolating the system from the
power supply and opening the
heat pump
Heat pump installation and serv-
ice instructions
Connecting the contact humidistat 24 V
Connection to the controller
and sensor PCB, terminal F11
Heat pump installation and serv-
ice instructions
Connecting the contact humidistat 230 V~
X3.1
X2.N
C
X3.8
X3.9
A
Contact humidistat 24 V
B
Converter 24 V /230 V~
Cross connect PCB or luster
C
terminals of the Vitotronic
control unit
Cable/lead routing inside the
heat pump
Heat pump installation and serv-
ice instructions
BN
BU
BK
GY
X3.1
X2.N
X3.8/X3.9 Floating contact for contact
Floating contact X3.8/X3.9:
■ Contact closed:
Safety chain has continuity
■ Contact open:
230 V ~
24 V
B
Phase switched
Neutral conductor
humidistat
GB
A
13