Viessmann Vitocal 222-S Installation And Service Instructions For Contractors page 43

Electrical connection
Indoor unit: Luster terminals (signal and safety connections)
Set the required parameters during commissioning:
See page 73 onwards.
Terminals Function
X3.1 Switched phase
X3.6 Power-OFF (jumper fitted at the fac-
X3.7 tory)
G
X3.8 Type AWBT(-M)-E-AC:
X3.9 Frost stat
■
and/or
Contact humidistat 230 V~
Or jumper
■
Type AWBT(-M)/AWBT(-M)-E:
Jumper
■
X40.L1 Heat pump control unit power supply:
Phase L1
X40.
?
X40.N Neutral conductor terminal
(cont.)
Earth conductor terminal
Explanation
Via control unit ON/OFF switch
Note
Observe the total load 1000 W of all connected compo-
nents.
Requires floating contact:
Closed: Heat pump operational
■
Open: Heat pump shut down
■
Breaking capacity 230 V~, 0.15 A
■
Remove jumper when connecting.
Note
No parameters need to be set
■
The compressor is "forced" off as soon as the contact
■
opens.
The power-OFF signal switches off the power supply
■
to the relevant components, subject to the power sup-
ply utility.
For the instantaneous heating water heater, the
■
stages to be switched off can be selected (parameter
"Output for instant. heating water heater at pow-
er-OFF 790A").
The power supply for the heat pump control unit
■
(3 x 1.5 mm 2 ) and the cable for the power-OFF signal
can be combined in a single 5-core cable.
For further information regarding power-OFF: See
chapter "Power supply".
In connection with Smart Grid:
Do not connect the power-OFF signal.
Do not remove jumper.
Requires floating contact:
Closed: Safety chain has continuity
■
Open: Safety chain interrupted; heat pump shut down
■
Breaking capacity 230 V~, 0.15 A
■
Connection:
Connected in series if both safety components are in-
■
stalled
Insert jumper if no safety components are instal-
■
led.
Power supply 230 V~: See page 49 onwards.
Installation sequence
43