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ELECTRICAL WIRING WORK
* The yellow-green wire of the air conditioner is the ground wire and must be fixed by the tapping screw. And it
cannot be used for other purpose or cut off. Otherwise, it will cause the hazard of electric shock.
* The reliable ground terminal should be provided and the ground wire cannot be connected to any of the
following places: a) Water pipe; b) Coal gas pipe; c) Sewage pipe; d) Lightning rod; e) Telephone line; f)Other
unreliable places considered by a professional.
PRECAUTIONS ON THE ELECTRICAL WIRING WORK
* The ground connection should be reliable and the ground wire should be connected to the dedicated device of
the building by the professional.
* The electric installation should be carried out by the professional as instructed by the local laws, regulations
and also this manual.
* The air switch coupled with the leakage current protection switch must be equipped in the circuits, which is of
enough capacity and of both magnetic and thermal tripping functions in case of the short circuit and overload.
* The power supply of the outdoor unit and all the BU modules should be separately.
* The electrical work should use a cable length enough to cover the entire distance with no connection. If it is
unavoidable, please make sure the connection should be reliable and the external forces will not act on the
wires. Otherwise it will cause electrical shock or fire etc.
* The power cable with the rated voltage and exclusive circuit for the air conditioning should be used.
* Do not pull the power cable by force.
* The diameter of the power cable should be large enough and once it is damaged, it must be replaced by the
dedicated one.
PRECAUTION OF LAYING WIRES
1) Use a wire stripper to strip off about 0.1inch of the
insulation layer at the end of the wires;
2) Loosen the screws on the terminal block of the air
conditioner;
3) Use the pliers to bend the end of the wire into a ring
shape corresponding the size of the screw;
4) Pass the screw through the wire ring and fix it onto the
terminal block.
PROCEDURES FOR ELECTRICAL WIRING WORK
1) Knock the holes in the plate of the chosen direction with the hammer.
2) Place the rubber ring on the knockout hole.
3) Let the power cable and transmission line go through the knockout hole.
4) Connect the power cable of the outdoor unit to the L1, L2 terminals with the sign of the XT1 and as well as the
ground screw.
5) Connect the transmission line of the outdoor unit to the N(1), 2 terminals with the sign of the XT2.
6) Fix the power cable and transmission line firmly by cable fixing clip.
7) Screw the coping plate, front side plate, right connection board, front connection board back.
8) Cover the through-holes with sealing materials to prevent the water, dust or small animals going into the
outdoor unit.
* The transmission line and the power cable must be separated and separated with an interval of at least 2cm;
otherwise it may be result in communication problem.
* In order to protect the power cable and transmission line from damaging by the hole, the rubber ring must be
placed on the hole. Otherwise, it may cause electrical shock or fire etc.
* The power wire and transmission line must be more than one meter away from televisions or radios which can
emit electromagnetic waves to prevent image interference or noise. Otherwise, the unit maybe cannot work.
* Confirm the each cable connected to the terminal screw is exactly and securely after finishing the electric work.
* Fix each ground wire separately with the ground screw.
* If the connecting wire is connected to the terminal incorrectly, the unit will not work normally.
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
INSTALLATION OF DRAIN HOSE
1) Choose one drain hole in the bottom of the outdoor unit.
2) Connect the drain hose to the drain hole.
3) The drain hose should be kept at 5~10 degrees of gradient to facilitate discharge
of the condensing water. Take care that does not exert too much force on the hose.
4) Thermal insulation materials should be placed at the joints of the drain
hose so as to prevent from dew condensation. Fix the drain hose firmly by
binding band.
5) The end of the drain hose should be inserted into the hole of drainage pipeline.
DESIGN OF DRAINAGE PIPELINE
1) The drainage pipeline should be kept at a certain gradient (1/50~1/100) so as to avoid bulges of pipes where
there might be water bends.
2) The drainage pipeline is form of the hard PVC pipes for common purposes which can be purchased locally.
The diameter of the PVC pipes is not less than 31mm and the pipeline should be fixed as close to the BU
module as possible.
3) Insert the drain hose into the drain hole of drainage pipeline. Use binding band to fix it tightly. It is not allowed
to use adhesive glue to join the drain hose to the drainage hole.
4) When the drainage pipeline is laid for a couple of units, the position of the shared pipeline should be
approximately 3.94inch lower than the drainage hole of each module. In this case, some special-purpose pipes
with thicker walls will be used.
5) At intervals of about 1 meter, fix the drain pipes to the wall with brackets, not floating in the air.
INSTALLATION OF PROTECTIVE LAYER ON CONNECTION PIPE
1) The refrigerant pipes should be insulated by the
insulating material and plastic tape in order to
prevent water condensation and leakage.
2) Do not use the foam on the branch pipe as the
material for heat insulation.
3) The joints of the system should be wrapped with
the insulating material and no gap is allowed on
the joint of the system, as shown in Fig.24.
4) Bundle the refrigerant pipe and transmission line
together with tape, and separate them from the
drain pipe to prevent the condensate water overflowing.
5) Wrap the pipe from the bottom of the outdoor unit to the top of the pipe where it enters the wall. During the
wrapping, the later circle should cover half of the former one.
6) At intervals of about 1 m eter, fix the refrigerant pipes to the wall with brackets, that is, don't let the unit
withstand the weight of it or float it in the air.
* After the pipe is protected well enough, never bend it to form a small angle(<90 ), otherwise it would crack or
break.
* Do not wrap the refrigerant pipes very tight, otherwise the insulation effect would be weakened. Additionally,
make sure the drain hose is separated from the refrigerant pipes.
* After that, cover the hole on the wall with sealing materials to prevent wind and noise going into the room.
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
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DESIGN OF DRAINAGE PIPELINE
O
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