22
AWR MTD - AWR MTD/B
GB 01/2009
SINGLE-PHASE WIRING DIAGRAM AWR 0025 - 0041 MTD/B (without built-in electric heaters)
A1
Radio interference suppresser
A2
Fan control module
A3 Electronic
controller
A4
Remote unit control display keypad
A5 Compressor
start
BP3
Condenser/evaporator control pressure transducer
BT1
W
a
ter heat exchanger inlet temperature sensor
BT2
W
a
ter heat exchanger outlet temperature sensor
BT3
Outside air temperature sensor
BT4
Hot water storage temperature sensor
C1
Compressor start capacitor
C2-3
Fan start capacitor
E1 W
a
ter
pump
EV1-2 Fan
F1
High pressure switch
F2
Low pressure switch
F3 Flow
switch
F4
W
a
ter dif
ferential pressure switch
FU1
System water pump protection fuse
FU2 Fan
protection
fuse
FU3
Heater protection fuse
FU4
230/24/12 V
A
C transformer protection fuse
FU5
Auxiliary circuit protection fuse
GN1
Green compressor ON light
KA2
Hot water storage heater relay
KA3
High pressure switch relay
KA4 R3
enabling
relay
KA5
3-way valve relay
KA6
Compressor control relay
KA7 Alarm
relay
KM4
Hot water storage heater control contactor
QM1
Compressor thermal overload switch
QS1
Door lock disconnect switch
R1
Compressor oil sump heater
R2
Heat exchanger frost heater
R5
Drain pan frost heater
RD1
Red unit shutdown warning light
SA1
On-of
f switch and/or timer input
SA2
Summer-winter switch input
TC1
230/24/12 V
A
C transformer
YV1 Reversing
valve
YV2
3-way valve (system/DHW)
Z1 Compressor
1 Not
supplied
2 Optional
