Viessmann Vitocal 300-G Installation And Service Instructions Manual page 21

Internal components type BWC/WWC
A Electronic expansion valve (EEV)
B Evaporator
C Low pressure sensor (0 to 15 bar)
D Suction gas temperature sensor
E Compressor
F High pressure sensor (1 to 35
bar)
Preparing for installation
(cont.)
G Hot gas temperature sensor
H Condenser
I LPG temperature sensor
J Safety high pressure switch
K Instantaneous heating water hea-
ter (accessories)
L Primary flow temperature sensor
M Primary return temperature sen-
sor
N Primary pump
O Brine pressure switch (accessory)
P Primary return (brine OUT)
R Primary flow (brine IN)
S Safety equipment block with
safety assembly
T Three-way valve (heating/DHW)
U Secondary pump
V Secondary flow temperature sen-
sor
W Secondary return temperature
sensor
X Heating water flow
Y DHW cylinder flow
Z DHW cylinder return/heating
water return
21