Viessmann VITOCAL 300-A Installation And Service Instructions Manual page 19

Type awc-i-m, aw-o-m compact heat pump with electric drive, 230 v~
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Internal heat pump, type AWC-I-M
Diagram with instantaneous heating
water heater (accessory)
B Secondary return temperature
sensor
D LPG temperature sensor
E Safety high pressure switch
I Schrader valve, high pressure
side
J Schrader valve, low pressure side
Preparing for installation
(cont.)
L Low pressure sensor
M Suction gas temperature sensor
P High pressure sensor
R Hot gas temperature sensor
V Secondary flow temperature sen-
sor
Z Fill & drain valve
1 Quick-acting air vent valve
2 Safety valve
3 Manual air vent valve
19

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