Viessmann Vitocal 252-A Series - Page 140

140
Indoor unit with 1 integrated heating/cooling circuit
A
B
E
D
F
G
K
H
L
C
M
Fig. 92
A
Expansion vessel
B
Integrated buffer cylinder
C
Water pressure sensor
D
4/3-way valve
E
High limit safety cut-out (STB), instantaneous
heating water heater
F
Flow sensor
G
Secondary pump
H
Instantaneous heating water heater
K
Safety valve
L
Flow temperature sensor
M
Return temperature sensor
Indoor unit maintenance
Overview of internal components
6222080
Maintenance