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COMMISSIONING
INSTALL THE CONNECTING PIPE
Check whether the height drop between the indoor unit and outdoor unit, the length of refrigerant pipe, and the number of
the bends meet the following requirements:
The max height drop --> 20m
(If the height drop is more than 0m, you had better put the outdoor unit over above the indoor unit .)
The length of refrigerant pipe --> less than 30m
The number of bends --> Less than 5
•
Do not let air, dust, or other impurities fall in the pipe system during the time of installation .
•
The connecting pipe should not be installed until the indoor and outdoor units have been fixed already.
•
Keep the connecting pipe dry, and do not let moisture in during installation .
The procedure of connecting pipes
Measure the necessary length of the connecting pipe, and make it by the following way:
1.
Connect the indoor unit at first, then the outdoor unit.
•
Bend the tubing in proper way . Don,t harm them .
Cautions
•
Daub the surfaces of the flare pipe and the joint nuts with frozen oil, and wrench it for 3~4 rounds with hands before fasten the
flare nuts. (Refer to chart 30)
•
Be sure to use two wrenches simultaneously when you connect or disconnect the pipes .
2.
The stop valve of the outdoor unit should be closed absolutely (as original state). Every time you connect it, first loosen the nuts
at the part of stop valve, then connect the flare pipe immediately (in 5 minutes). If the nuts have been loosened for a long time,
dusts and other impurities may enter the pipe system and may cause malfunction later . So please expel the air out of the pipe
with refrigerant before connection .
3.
Expel the air (refer to the ¡Expel The Air¡) after connecting the refrigerant pipe with the indoor unit and the outdoor unit . Then
fasten the nuts at the repair-points .
Notice for Benable pipe
•
The bending angle should not exceed 90°C
•
Bending position is preferably in the bendable pipe . The larger the better it is .
•
Do not bend the pipe more than three times .
Bend the connecting pipe of small wall thickness
•
Cut out a desired concave at the bending part of the insulating pipe .
•
Then expose the pipe(cover it with tapes after bending) .
•
To prevent collapsing of deforming, please bend the pipe at its biggest radius .
•
Use bender to get a small radius pipes .
Use the market brass pipe
1.
Be sure to use the same insulating materials when you buy the brass pipe .(More than 9mm thick)
2.
Locate the pipe
i.
Drill a hole in the wall (suitable just for the size of the wall conduit, 90mm in general), then set on the fittings such as the
wall conduit and its cover .
ii.
Bind the connecting pipe and the cables together tightly with binding tapes . Do not let air in, which will cause water
leakage by condensation .
iii.
Pass the bound connecting pipe through the wall conduit from outside . Be careful of the pipe allocation to do no damage
to the tubing .
3.
Connect the pipes .
4.
Then open the stem of stop valves of the outdoor unit to make the refrigerant pipe connecting the indoor unit with the outdoor
unit fluently flow.
5.
Be sure of no leakage by checking it with leak detector or soap water .
6.
Cover the joint of the connecting pipe to the indoor unit with the soundproof/insulating sheath (fittings), and bind it well with
the tapes to prevent leakage .
Use frozen oil
Chart 30
• 0 •
Bend the pipe with thumb
Chart 3
Make the ends
straight
Chart 32
DUCTAIR II - 0808-E
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