Viessmann VITOCAL 100-S - Page 87

87
A BC D
E
F
G
H
K
L
M
N
O
P
R
S
T
V
U
W
Fig. 67
A
Condenser
B
Safety valve
C
Secondary circuit air vent valve
D
Only for type AWB(-M)-E/AWB(-M)-E-AC:
High limit safety cut-out for the instantaneous heat-
ing water heater
E
Expansion vessel 10 l
F
Flow switch
G
Quick-action air vent valve G ⅜
H
Only for type AWB(-M)-E/AWB(-M)-E-AC:
Instantaneous heating water heater
K
Flow temperature sensor for secondary circuit (F8)
L
3-way diverter valve "central heating/DHW heat-
ing"
M
Secondary circuit return temperature sensor (F9)
N
Secondary pump
O
Secondary circuit drain & fill valve
P
Pressure gauge
R
Indoor unit service valve: Schrader valve; can be
used in place of the outdoor unit service valve for
checking the pressure and evacuating the refriger-
ant circuit.
S
Only for type AWB(-M)-E/AWB(-M)-E-AC:
Secondary circuit flow temperature sensor
upstream of instantaneous heating water heater
(F3)
T
Drain valve
U
Reversible suction gas temperature sensor (F24)
V
Indoor unit service valve: Schrader valve; can be
used in place of the outdoor unit service valve for
checking the pressure and evacuating the refriger-
ant circuit.
W
Liquid gas temperature sensor (F25)
Outdoor unit: Overview of internal components
Danger
Contact with live components can lead to seri-
ous injury from electric current. Some compo-
nents on PCBs remain live even after the power
supply has been switched off.
■
When working on the outdoor unit, isolate the
system from the power supply, e.g. at a sepa-
rate MCB/fuse or a mains isolator. Check the
system is no longer live and safeguard against
reconnection.
■
Prior to working on the appliance, wait at least
4 min until the voltage on the charged capaci-
tors has completely dropped out.
Maintenance
Indoor unit: Overview of internal components
6199585
Maintenance