92
A
Cylinder air vent valve for internal
coil
B
Cylinder temperature sensor
C
Cylinder drain & fill valve (see fol-
lowing chapter)
D
3-way diverter valve "Heating/DHW
heating"
E
Secondary pump
F
Secondary circuit flow temperature
sensor
G
Secondary circuit return tempera-
ture sensor
H
Instantaneous heating water heater
with high limit safety cut-out
K
Secondary circuit drain & fill valve
L
Internal unit service valve (Schrader
valve; can be used in place of the
external unit service valve for check-
ing pressure and evacuating the
refrigerant circuit; see page 69)
M
Liquid gas temperature sensor (IRT)
N
Secondary circuit temperature sen-
sor upstream of the instantaneous
heating water heater (LWT)
P
Secondary circuit air vent valve
R
Pressure sensor (ICT) for determin-
ing condenser condensation tem-
perature
Cylinder drain & fill valve positions
A
B
C
A
Cylinder drain & fill valve closed
B
Cylinder drain & fill valve open to
drain the internal DHW line
Troubleshooting
Repairs
(cont.)
5600 950 GB
