91
?
Secondary circuit flow tempera-
ture sensor (alternative posi-
tions)
%
A
Solar circuit return temperature
sensor
aJ
Secondary circuit return tem-
perature sensor
sG
Secondary pump
lJ
3-way diverter valve for "Central
heating/DHW heating"
a:D
B
PWM signal, secondary pump
a:D
C
PWM signal, cylinder loading
pump
A
Cylinder temperature sensor
B
Non-return valve
C
DHW cylinder drain & fill valve:
See following chapter.
D
Instantaneous heating water
heater with high limit safety cut-
out
E
Secondary circuit drain & fill
valve
F
Service valve, internal unit:
Schrader valve, can be used in
place of the external unit service
valve for pressure checks and
evacuating the refrigerant cir-
cuit; see page 66.
G
Liquid gas temperature sensor
(IRT)
H
Secondary circuit flow tempera-
ture sensor, upstream of instan-
taneous heating water heater
(LWT)
K
Secondary circuit air vent valve
L
Pressure sensor (ICT) for deter-
mining condensation tempera-
ture in condenser
Troubleshooting
Repairs
(cont.)
5546 699 GB
Service