6
4. WIRING
Warning
● All the supplied parts, materials and electrical works must com-
ply with local regulations.
● Only use copper wires.
● Use a steady power supply for the air-conditioners. The power
voltage must be in line with the rated voltage.
● The electrical wiring works must be carried out by a professional
technician, and must comply with the labels stated in the circuit
diagram.
● Before the electrical connection works are carried out, turn off
the power supply to prevent injuries caused by electric shock.
● The external power supply circuit of the air conditioner must
include an earth line, and the earth line of the power cord
connecting to the indoor unit must be securely connected to the
earth line of the external power supply.
● Leakage protective devices must be configured according to
the local technical standards and requirements for electrical and
electronic devices.
● The fixed wiring connected must be equipped with an all-pole
disconnection device with a minimum 3 mm contact separation.
● The distance between the power cord and signal line must be at
least 300 mm to prevent the occurrences of electrical interfer-
ence, malfunction or damage to electrical components. At the
same time, these line must not be in contact with the piping and
valves.
● Choose electrical wiring that conforms to the corresponding
electrical requirements.
● Connect to the power supply only after all the wiring and
connections have been completed, and check carefully if the
connection is correct.
figure of the power supply terminal
POWER INPUT
L
N
Fig. 4-1
When connecting to the power supply terminal, use the circular
wiring terminal with insulation.
Use power cord that conforms to the specifications and connect
the power cord firmly. To prevent the cord from being pulled out by
external force, make sure it is fixed securely.
If circular wiring terminal with insulation cannot be used, please
make sure that:
• Do not connect two power cords with different diameters to the
same power supply terminal (may cause overheating).
+
:
Circular wiring
terminal
Power
cord
Insulation tube
Copper wire
Proper power wiring connections
Fig. 4-2
Fig. 4-3
4.1 Electric data Specification
Table 4-1
Model KRE-D200~ 2000(B)
Power supply
Phase
Single phase
Voltage
/frequency
220-240V/50Hz
Input current
Main switch
/fuse(A)
15/30
Power supply
wireDimension
Wire’s qty
3 (Earthing line
should be used
yellow/green wire.)
Wire
cross
-section
(mm
2
)
2.5
● After wiring, please confirm all connections are correct, and then
power to the unit.
● Pay attention to the power supply wire of three-phase model;
confirm the phase sequence of which is correct.
Table 4-2
ENC1 Settings for Capacity SW1 Setting for static pressure
ENC1
Capacity setting
0
200
1
300
2
400
3
500
4
800
5
1000
6
1500
7
2000
SW1-1
ON
12
ON
Low static pressure
OFF
12
ON
High static pressure
SW1-2
ON
12
ON
KRE centralized control
OFF
12
ON
KRE single unit operation
SW2-1
ON
12
ON
3
With PRO
OFF
12
ON
3
Without PRO
SW2-2
ON
12
ON
3
Positive Pressure
OFF
12
ON
3
Negative Pressure
SW2-3
ON
13
ON
2
SW2 -2
OFF
12
ON
3
Balance Pressure
Caution
• Positive Pressure: In the positive pressure mode, the supply
fan operating fan speed is higher than the exhaust fan.
• Negative Pressure: In the negative pressure mode, the exhaust
fan operating fan speed is higher than the supply fan.
• Balance Pressure: In the balance pressure mode, the supply
fan operating wind gear is equal to the exhaust fan.
