MCAC-UTSM-2014-03 R410A 380~415V 3Ph 50Hz TempMaker Series Split AC
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just touches the chamfered retaining wall.
Replace plunger cap finger tight, then tighten an additional 1/12 turn (1/2 hex flat). Cap must be
replaced to prevent leaks.
Never attempt to repair any brazed connections while the system is under pressure. Personal
injury could result.
After the pipes between the indoor unit and the outdoor unit are connected, replenish
compressed nitrogen to perform airtight test.
The airtight test is performed by using the compressed nitrogen, 2.94MPa (30kg/cm
2
G).
Leak test with a bubble type leak detector. Do not use the system refrigerant in the outdoor
unit to purge or leak test.
Tighten the spool of the low pressure valve and high pressure valve before compressing the
nitrogen.
Compress the nitrogen at the air vent of the gas valve.
The low pressure valve and high pressure valve are closed in the process of compressing
the nitrogen.
Do not use oxygen, flammable gas or toxic gas in the airtight test.
Vacuum
Length of connective pipe
(Single pass)
Procedure of expelling air
Use refrigerant in the outdoor unit.
Use vacuum pump or refrigerant tank.
Note: If the air conditioner is relocated, be sure to use a vacuum pump or refrigerant tank to expel air.
Use the refrigerant in the outdoor unit to expel air.
Screw up the pipe nuts at A, B, C and D completely.
Loosen and remove the square-head cover of valves A and B, rotate the square-head
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