7-1 The specification of power
Single-phase
220-240V ~ 50Hz
Model
Phase
Power
Voltage and Frequency
AHU
5HP
6
installation manual
7. ELECTRICAL WIRING
CAUTION
The outdoor and indoor units should use separate power
supply with rated voltage. but all the indoor units in the same
system shoud be use the same power.
The external power supply to the air conditioner should have
ground wiring, which is linked to the ground wiring of the indoor
and outdoor unit.
The wiring work should be done by qualified persons according
to circuit drawing.
The fixed connecting lines must equip with at lease 3mm
electric shock spacing.
A leakage protector should be installed according to the local
electrical standard.
Be sure to locate the power wiring and the signal wrings well to
avoid cross-disturbance and their contact with connecting pipe
or stop value body. Generally, do not twist two wiring together
unless the joint is soldered well and covered with insulator
tape.
Do not turn on the power until the electrical wiring have been
done correctly.
CAUTION
The specification of power as the follow display figure, if the
wire is too small will lead to over heat, and cause burning of
the machine accident.
The air-gap notch in the circuit breaker is used for insulating the
flexible conductor, so that must respond to the related national
wire requests to connect to the fixed circuit.
7-2 The maxium current of AC motor
The DX AHU control box has a control port for single-phase AC
motor, refer to Fig.7-2. Please pay attention to the maxium current
of motor, it should not exceed value in the table 7-3.
1
2
3
4
5
6
7
Table.7-1
Neutral
High
Medium
Low
Connect to indoor power
Fig.7-1
Fig.7-2
208-230V ~ 60Hz
Please use 3-core shielding wire,
and ground the shielding layer.
Fig.7-3
Fig.7-4
Remote
switch
Indoor unit power wire(mm
2
)
2.0(<50 m)
0.75
communication wire(mm
2
)
weak electric signal
Note, The connecting terminals of the water level switch W1 and W2 are
connected by default, when connect the indoor unit with water pump
please remove the connecting wire and connect to the water level switch.
Single-phase
220-240V ~ 50Hz
Model
Phase
Power
Voltage and Frequency
AHU
10HP, 20HP
Table.7-2
208-230V ~ 60Hz
Indoor unit power wire(mm
2
)
4.0(<50 m)
0.75
communication wire(mm
2
)
weak electric signal
220-240V~ 50Hz
208-230V~ 60Hz
N H M L
P1 N1
Pump contral
AC fan contral
X Y E P Q W1 W2 O
Water lever
switch
Remove the
short-wire and
connect to water
pump switch if
the water pump
is available.
To outdoor
units
communi-
cation bus
To slave
DX AHU
unit
communi-
cation bus
AHU
on-off
Alarm
status
Defrost
status
DX
unit
run
status
Temperature
set
Fan
atatus
Heat
on-off
Cool
on-off
The communication ports with SIEMENS controller
54 53
M D4 D3 S Y1 M 14 13 34 44
7-3 Terminal block setting figure
Please refer to the indoor unit wiring figure for connecting wire.
Table.7-3
AHU
5HP
AHU
10HP, 20HP
Model
The maxium current of AC motor
3.5 A
18 A
Содержание SYSVRF AHU 10HP S
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