Viessmann VITOCAL 242-G Installation And Service Instructions Manual page 53

Overview of electrical components
Type BWT-M 241.A (230 V~)
G
H
K
L
aCH
kK
M
N
P
Q
Fig. 42
(cont.)
Reset button of the high limit safety cut-out of the
A
instantaneous heating water heater
Compressor contactor
F B
Cable channel
C
3 rows of luster terminals
D
C
Controller and sensor PCB
E
Programming unit
F
Main PCB
G
E
Expansion PCB on the main PCB
H
Compressor power supply
K
Switching module with power supply for instanta-
L
neous heating water heater
Starter
M
D
Motor overload relay
N
Run capacitor
P
Start capacitor
Q
Secondary pump plug
sG
C
Primary pump plug
sH
Compressor plug
kK
C
3-way diverter valve plug
lJ
Safety chain plug
aYH
Plug, switching module, instantaneous heating
aCH
water heater
X3 Plug, compressor control and safety equipment
switching
X3
sG
sH
lJ
aYH
C
B
A
Maintenance
53