29
Installation and Maintenance
Service Manual
Situation of bending thinwalled pipe
1. When bending the pipe, cut off the needed recess at the
bended part of insulation pipe and then expose the pipe (wrap it
with sealing tape after bending).
2. The pipe bended radius should be big in order to avoid
damage.
3. Use pipe bender for the compact pipe bending.
1. It must be a specialized brand circuit included the electric
leakage protector with sufficient capacity.
2. Including an air switch with suitable capacity, please note the
following table. Air switch should be included magnet buckle and
heating buckle function, which can protect the circuit-short and
overload. (Caution: please do not use the fuse only for protecting
the circuit.)
3. The capacity of wire diameter shall be 1.5 times bigger than the
maximum
current of air conditioner.
4. The minimum distance between the air conditioner and
flammable surface should be 1.5m.
5. A circuit breaker switch must be installed in the fixed circuit. The
circuit breaker should be all-pole parting and the contact parting
distance should be more than 3mm.
Note:
1. During electric connection, arrange sufficient protection
according to the surrounding conditions (ambient temperature,
direct sunlight, rain, etc.).
2. The power cord and power connection wire shall apply cooper
core cable which
accords with national standards.
3. Indoor unit and outdoor unit shall be grounded reliably.
Adopt cooper pipe sold in the market
The cut-off valve of outdoor unit shall be closed completely. After
the connection is connected with the indoor unit and outdoor unit,
perform discharge from the maintenance port of low pressure cut-
off valve at outdoor unit. After discharging, screw up the nut at
maintenance port.
After fi
nishing the three points mentioned above
The valve rod of outdoor cut-off valve should be opened
completely to ensure smoothness of connection pipe between
indoor unit and outdoor unit.
Note:
When the outdoor unit is installed higher than the indoor unit, an
oil return bend must be adopted.(As show in Fig.4)
Fig.4
seal the wall hole with sealing gum
electric coil (prevent water from
getting into the electric box)
watertight bend (prevent rain from
getting into the indoor side)
oil return bend
Disposal of electric wire
1. Grounding must be performed by the qualified person on the
specialized grounding device of building. An electricity leakage
protection switch and air switch with sufficient capacity must be
included in the fixed circuit.
2. The power must adopt rated voltage and specialized circuit of
air conditioner.
3. The diameter of power cord must accord with related
requirement.
4. Perform installation according to national wiring rules.
5. Proper grounding measure must be applied.
6. Do not pull the power cord forcibly.
7. If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualified persons in
order to avoid a hazard.
Pay attention to the following items when
connecting wires
1. Please do the wiring according to the wiring diagram. The
screws must be tightly fastened, the slippery screws must be
changed, the tapping screw cannot be used for electric wiring.
2. Use the cables provided with the unit. Do not replace the cables
or change the length or terminal of cable. If a change is needed,
please contact appointed maintenance center.
3. After the electric installation completed, make sure to use wire
clamp to fix the power cord, power supply connection wire and
signal wire tightly, and ensure that there is enough space in the fix
position and each connection terminals of the lead wires.
4. Please use about a half kilogram of force to check whether
each lead wire is installed well. When checking the air connector,
please enclasp it, and check each lead wire of which is connecting
with the connector.
5.
is the symbol of grounding; it denotes that the yellow-green
wire only can be connected with the place with the symbol.
6. For the power cord which is without the plug, you cannot
connect the plug for using.
7. The electric connection of indoor and outdoor should not be
affected by the stretch and bending.
8. Specialized circuit must be used for power supply.
9. Please do the wiring according to the wiring diagram sticking
on the unit.
10. The primary coil of control circuit transformer shall be
connected to the power supply of 220V. Detail satiation please
refer to the wiring diagram.(As show in Fig.5)
11. For the floor standing type air conditioner using three
phase power supply, the phases shall be connected properly.
If the phases are connected wrongly or phase reverse occurs,
the protector in the control circuit will take protection and the
compressor can’t start up. In this case, please cut off the power
Basic Requirements
As the power of air conditioner is relatively big, the circuit
for power supply of air conditioner must meet the following
requirements:
8.5 Requirement of Electric Safety
Air-conditioner
Air switch capacity
24K
25A
