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installation manual
Fig.7-1
A
L
L1
L2
Outdoor unit
The line branch pipe
Indoor unit
Note: All used branch pipe must be produced by Midea,otherweise it causes malfunction.
The indoor units should be installed equivalently at the both side of the U type branch pipe.
Fig.7-2
10°
10°
A
Fig.7-3
The branching pipe must be installed horizontally, error angle
of it should not large than 10°. Otherwise, malfunction will be
caused.
Correct Wrong
U-shaped branching pipe
Horizontal surface
A direction view
Use the vacuum pump which vacuum level lower than
-0.1MPa and the air discharge capacity above 40L/min.
The outdoor unit is not necessary to vacuum, dont open the
outdoor unit gas and liquid pipe shut-off valves.
Make sure the vacuum pump could result as -0.1MPa or
below after 2 hrs or above operation. If the pump operated 3
hrs or above could not achieve to -0.1MPa or below, please
check whether water mix or gas leak inside of the pipe.
7.2 Vacuum with vacuum pump
1)
2)
3)
CAUTION
7.3 Refrigerant amount to be added
Dont mix up the different refrigerants or abuse the tools and
measurements which directly contact with refrigerants.
Dont adopt refrigerant gas for air vacuuming.
If vacuum level could not get to -0.1MPa, please check whether
resulted by leakage and confirm the leakage site.If no leakage,
please operate the vacuum pump again 1 or 2 hrs.
Connect with vacuum pump
Perform the pump (last for 2 hrs or above)
When get the vacuum level
-0.1MPa, the pump should
keep running for 20-60 mins
Shut down the
vaccun pump
Place the vaccum state unused (1 hrs or above)
1. Close-off the valve of
vacuum meter.
2. Cut off the connection
between pressure meter
and vacuum pump.
3. Close the vacuum
pump.
14


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