Viessmann Vitocal 300-G Installation And Service Instructions Manual page 19

Internal components type BW/WW
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)
G Hot gas temperature sensor
Preparing for installation
(cont.)
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 (accessory)
O Brine pressure switch (accessory)
P Primary return (brine OUT)
R Primary flow (brine IN)
T Secondary pump, heating circuit
(accessory)
U Circulation pump for cylinder
heating (accessories)
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
19