Viessmann Vitocal 222-S Installation And Service Instructions For Contractors page 42

Installation sequence
Electrical connection
Plug sXF
Terminals Function
224.4 Control of an instantaneous heating
water heater, stage 2
2.
r
Instantaneous heating water heater
Type AWBT(-M): Accessories
Installation instructions, instantaneous heating
water heater
Plug
sXG
Terminals Function
225.1 Heating circuit pump of the heating
circuit with mixer M2/HC2
M2
r
225.2 Mixer motor control, heating circuit
M2/HC2
M2
Signal mixer CLOSE
225.3 Mixer motor control, heating circuit
M2/HC2
M2
Signal mixer OPEN
42
(cont.)
Explanation
Connection values:
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Control and power circuit of the instantaneous
heating water heater
L1
L2
L3
N
?
211.3
224.4
B
X2.N
?
Fig. 40
Instantaneous heating water heater
A
Connection to the main PCB and expansion PCB
B
211.3 stage 1
224.4 stage 2
Explanation
Connect a temperature limiter to restrict the maximum
temperature for underfloor heating circuits (if installed)
in series.
Connection values:
Output: 100 W
■
Voltage: 230 V~
■
Max. control current: 4(2) A
■
Connection values:
Output: 10 W
■
Voltage: 230 V~
■
Max. control current: 0.2(0.1) A
■
Connection values:
Output: 10 W
■
Voltage: 230 V~
■
Max. control current: 0.2(0.1) A
■
!
A