Viessmann Vitoclima 300-S Service Instructions For Contractors page 35

Type OT307H
A Heat exchanger of the external
unit with temperature sensor
B Liquid collector
C Filter dryer
D Three-way valve of the liquid line
with service valve
E Three-way valve of the suction
line with service valve
F Electronic expansion valves
G Filter
Note
The refrigerant circuit is changed over by four-way reversing valve
cooling to heating.
Refrigerant circuits
H Suction gas temperature sensor
circuit A
K Heat exchanger with temperature
sensors of internal devices A, B
and D
L Pre-liquid separator
M Main liquid separator
N Compressor
O Oil separator
P Four-way reversing valve
from
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