Viessmann Vitocal 222-S Installation And Service Instructions Manual page 67

Further details regarding the individual steps
A
Example type AWT-AC 221.A07
A Internal unit
B Hot gas line
C External unit
D Service valve (Schrader valve)
In type AWT-AC 241.A07 the serv-
ice valve is located at the connec-
tion of the liquid line.
B
C
E
D
F
E
Commissioning, inspection, maintenance
(cont.)
G
K
L
H
M
E Fill valve
F Shut-off valve
G Liquid line
H Fill hose between pressure gauge
set and external unit
K Pressure gauge set
N P Q
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