Service manual

15GB 01/2009 AWR MTD - AWR MTD/B
MAINS POWER SUPPLY CONNECTIONS
I A
- Before connecting the unit to the power supply, makes
sure that switch QF1 is open, suitably padlocked and
marked.
- Remove the inspection panel by unscrewing the eight
screws (0011) - or ten screws (0025-0061)
- Use cable gland A for the main electrical power cable and
cable gland B for other external cables to be connected by
the installer.
- Identify the terminals used for electrical connections on
the layout drawing shown in this manual.
For the functional connection of the unit, bring the power
supply cable to the electrical panel inside the unit and con-
nect it to terminals U-N for units 0025-0041, to terminals
T1 and T3 on the disconnect switch for units 0011,
respecting the (U) phase, (N) neutral and (PE) earth in the
case of single phase units (230V~50Hz), or U-V-W phas-
es, N neutral and PE earth in three phase units (400V-3N~
50 Hz).
- Reposition the inspection panel.
- Check that all the covers removed to make the electrical
connections have been replaced before powering up the
unit.
- Place the main switch QF1 (outside the unit) in the “ON”
position.
- The “POWER” LED on the control panel comes on to sig-
nal that power is connected.
- The message ON is shown on the HSW11 control panel,
signalling that power is connected.
A
B
A5
ELECTRICAL PANEL LAYOUT AWR 0011 MTD-MTD/B SINGLE-PHASE
A1 Radio interference suppresser
A2 Fan control module
A3 Electronic controller
A5 Peak limiter
C1 Compressor start capacitor
C2-3 Fan start capacitor
FU3 Auxiliary circuit protection fuse
FU4 Transformer protection fuse
FU5 Board power supply protection fuse
TCI Autotransformer
KA2 Auxiliary heating element relay
KA3 High pressure switch relay
KA4 Electric heater relay
KA5 Domestic hot water 3-way valve relay
KA6 Compressor control relay
KM2-3 Auxiliary heater contact (MTD version only)
QM1 Compressor thermal overload switch
QF1 Unit thermal overload switch
QF2-3 Auxiliary heating element thermal overload switch (MTD
version only)
QS1 Door lock disconnect switch