45
Installation and Maintenance
Service Manual
(1) After tightening the screw, pull the power cord slightly to
check if it is rm.
(2) Never cut the power connection wire to prolong or shorten the
distance.
Note:
5. Connect Outdoor Electric Wire
(1) Remove the wire clip; connect the power connection wire and
signal control wire (only for cooling and heating unit) to the wiring
terminal according to the color; x them with screws.(As show in
Fig.23)
6. Installation connection wires of DRED module
(1) For the connection wire and power cord of DRED module,
it’s suggested to use rubber cord that is pursuant to IEC 57 of
IEC 60245. If the power cord and connection wire use H05VV-F
or other conducting wires that are unsuitable for outdoors, we
suggest user should install the power cord and connection wire in
wire-leading ducts that are separated from rain and violet ray.
(2) DRED module should be installed indoors or inside an
enclosed space that can prevent rain and violet ray.
(3)The connection wire of DRED module and the wire connecting
indoor unit and outdoor unit shall share a same wire clip. Another
wire clip is used to secure the power cord of outdoor unit
(as picture shows).
Note:Below picture is for reference. Please refer to actual
products.
(2) Fix the power connection wire and signal control wire with wire
clip (only for cooling and heating unit).
Fig.23
yellow-
green
N(1)
POWER
2
N
Indoor unit connection
(black)
L(3)
brown
L
blue
black
brown
blue
yellow-
green
Note: the wiring connect is for reference only,please refer to the
actual one.
can't raise
upwards.
7. Neaten the Pipes
(1) The pipes should be placed along the wall, bent reasonably
and hidden possibly. Min. semidiameter of bending the pipe is
10cm.
(2) If the outdoor unit is higher than the wall hole, you must set
a U-shaped curve in the pipe before pipe goes into the room,
in order to prevent rain from getting into the room.(As show in
Fig.24)
Fig.24 Fig.25
U-shaped curve
(1) The through-wall height of drain hose shouldnt be higher than
the outlet pipe hole of indoor unit.(As show in Fig.25)
(2) Slant the drain hose slightly downwards. The drain hose cant
be curved, raised and uctuant, etc.(As show in Fig.26)
(3) The water outlet cant be placed in water in order to drain
smoothly.(As show in Fig.27)
Note:
DRED module
connection
wires of
DRED
module
The drain hose can't be fluctuant
The drain
hose can't
be fluctuant
The water
outlet can't
be fluctuant
The water outlet
can't be placed
in water
1. Use Vacuum Pump
(1) Remove the valve caps on the liquid valve and gas valve and
the nut of refrigerant charging vent.
(2) Connect the charging hose of piezometer to the refrigerant
charging vent of gas valve and then connect the other charging
hose to the vacuum pump.
(3) Open the piezometer completely and operate for 10-15min to
check if the pressure of piezometer remains in -0.1MPa.
(4) Close the vacuum pump and maintain this status for 1-2min
to check if the pressure of piezometer remains in -0.1MPa. If the
pressure decreases, there may be leakage.
(5) Remove the piezometer, open the valve core of liquid valve
and gas valve completely with inner hexagon spanner.
(6) Tighten the screw caps of valves and refrigerant charging vent.
(As show in Fig.28)
8.7 Vacuum Pumping and Leak Detection
Fig.26 Fig.27
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