Viessmann VITOCAL 222-S Installation And Service Instructions Manual page 72

Maintenance
Overview of internal components: External unit
External unit 10 to 16 kW, type AWT/AWT-AC 221.A10/A13, 221.B10 to B16
B
A
Fig. 61
Fan
A
Heat exchanger (evaporator)
B
C Temperature sensor, air intake, evaporator (OAT)
Evaporator temperature sensor (OMT)
D
Temperature sensor, refrigerant inlet, evaporator
E
(OCT)
72
(cont.)
C
4-way diverter valve
F
Electronic expansion valve (EEV)
G
H Liquid separator
High pressure switch (pHi)
K
Compressor head temperature sensor (CTT)
L
Compressor
M
D
E
F
G
H
K
L
M