69
%
lJ
aJ
?
A
B
C
F
E
D
G
K
H
a:C]
B
,
sG
Fig. 57
?
Flow temperature sensor, secondary circuit
(alternative positions)
%
Cylinder temperature sensor
aJ
Secondary circuit return temperature sensor
sG
Secondary pump
lJ
3-way diverter valve for "central heating/DHW
heating"
a:D
B
PWM signal, secondary pump
A
DHW cylinder air vent valve for internal indirect
coil
B
DHW cylinder drain & fill valve: see following
chapter.
C
Instantaneous heating water heater with high
limit safety cut-out
D
Secondary circuit drain & fill valve
E
Indoor unit service valve: Schrader valve; can
be used in place of the outdoor unit service
valve for checking pressure and evacuating the
refrigerant circuit; see page 51.
F
Liquid gas temperature sensor (IRT)
G
Flow temperature sensor, secondary circuit,
upstream of instantaneous heating water
heater (LWT)
Maintenance
Overview of internal components: indoor unit
5776 028 GB
Maintenance
Summary of Contents for AWT 221.A04
Page 77: ...77 Maintenance Checking the fuses cont 5776 028 GB Maintenance...
Page 87: ...87 Indoor unit parts lists Indoor unit hydraulics cont 5776 028 GB Components...
Page 90: ...90 Indoor unit parts lists Indoor unit cylinder cont 5776 028 GB Components...
Page 137: ...137 Wind direction 11 Wind loads 11 Keyword index Keyword index cont 5776 028 GB...
Page 138: ...138 5776 028 GB...
Page 139: ...139 5776 028 GB...
