65
T6
T3
T7
D
T5
E
K
P
M
X
L
S
R
V
Y
O
C
B
T4
Z
H
F
A
G
T1
T2
N
U
W
T
F3
Fig. 43
A
Oil separator
B
Safety high pressure switch
C
High pressure sensor
D
Low pressure sensor
E
Low pressure Schrader valve
F
Compressor
G
Electronic expansion valve
H
Filter
K
Evaporator
L
High limit safety cut-out, instantaneous heating
water heater
M
Primary circuit drain & fill valve
N
Instantaneous heating water heater
O
Secondary circuit drain & fill valve
P
Drain valve, instantaneous heating water heater
R
Primary pump
S
Secondary pump
T
Secondary circuit air vent valves
U
Secondary circuit air vent valve on the DHW side
V
High pressure Schrader valve
W
Primary circuit air vent valves
X
Secondary circuit air vent valve, condenser
Y
Condenser
Z
3-way diverter valve "central heating/DHW heat-
ing"
F3 Primary circuit return temperature sensor (Viess-
mann Pt500A)
T1 Secondary circuit flow temperature sensor
(NTC 10 k
Ω
)
T2 Secondary circuit flow temperature sensor down-
stream of instantaneous heating water heater
(NTC 10 k
Ω
)
T3 Secondary circuit return temperature sensor
(NTC 10 k
Ω
)
T4 Suction gas temperature sensor (NTC 10 k
Ω
)
T5 Primary circuit flow temperature sensor
(NTC 10 k
Ω
)
T6 Hot gas temperature sensor (NTC 10 k
Ω
)
T7 Liquid gas temperature sensor (NTC 10 k
Ω
)
Note regarding the temperature sensors
F.. Temperature sensor is connected to the controller
and sensor PCB.
T.. Temperature sensor is connected to EEV PCB.
"Vitotronic 200" service instructions
Maintenance
Overview of internal components
6153640
Service
