Overview Of Internal Components - Viessmann Vitocal 222-G Installation And Service Instructions Manual

Maintenance

Overview of internal components

A aS
sH ,
a:C] A
aYN{A .
.
aYN{S
aYN{G .
B C kK
aYN{H .
Fig. 46
54
?
%
aS
aJ
L
sG
sH
kK
lJ
aYH
%
A
B
C
D
E
K F
G
lJ
H
K
sG ,
L
a:C] B
?
aJ
H
G
F
E
.
aYN{D
D
.
aYN{F
Secondary circuit flow temperature sensor
Cylinder temperature sensor
Primary circuit flow temperature sensor (heat
pump brine inlet)
Secondary circuit return temperature sensor
Secondary pump
Primary pump
Compressor
3-way diverter valve for "central heating/DHW
heating"
Connection at terminals:
1, 2 Klixon hot gas
3, 4 Low pressure switch
5, 6 Safety high pressure switch
Air vent valve, primary circuit
Drain valve, condenser
Schrader valve, high pressure side
Drain valve, primary pump
Drain valve, secondary side
Schrader valve, low pressure side
Instantaneous heating water heater
High limit safety cut-out, instantaneous heating
water heater
Drain & fill valve, DHW cylinder
Air vent valve, secondary circuit