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INSTALLATION MANUAL
INSULATION AND TAPING
·
Cover piping joints with pipe cover.
·
For outdoor unit side, surely insulate every piping including valves.
·
Using piping tape, apply taping starting from the entry of outdoor unit.
-Fix the end of piping tape with adhesive tape.
-When piping has to be arranged through above ceiling, closet or area
where temperature and humidity are high, wind addtional commercially
sold insulation for prevention of condensation.
5-4. PURGING PROCEDURES·LEAK TEST
1.PURGING PROCEDURES
（1）Connect the refrigerant pipes(both liquid pipe and gas pipe) bet-
ween the indoor unit and the outdoor unit.
（2）Remove the service port cap of the stop valve on the gas pipe
side of the outdoor unit. (The stop valve will not work in it initial
state fresh out of the factory [totally closed with cap on].)
（3）Connect the gauge manifold valve and vacuum pump to the ser-
vice port of the stop valve on the gas pipe side of the outdoor unit
（4）Run the vacuum pump. Vacuumize for more than 15 minutes.
（5）Check the vacuum with the gauge manifold valve, then close the
gauge manifold valve and stop the vacuum cap.
（6）Leave it as is for one or two minutes. Make sure the pointer of the
gauge manifold valve remains in the same position. Confirm that
the pressure gauge shows -0.101MPa or -760mHg .
（7）Remove the gauge manifold valve quickly from the service port
of the stop valve.
（8）After refrigerant pipes are connected and evacuated, fully open
all stop valves on both sides of gas pipe and liquid pipe.
（9）Pipe length up to 15m, no gas charge is needed.
Pipe length exceeding 15m,charge the prescribed amount of gas.
（10 Tighten the cap to the service port to obtain the initial status.
）
（11 Retigten the cap.
）
（12）Leak test.
NOTE:
Each set of pipes must be purged individually.
-0.101MPa
(-760 mmHg)
Handle
Low
11
Compound pressure
gauge(for R410A)
Pressure gauge
(for R410A)
Gauge manifould
Valve(for R410A)
Handle High
Charge hose
(for R410A)
(Or the vacuum
Window
pump with the
function to prevent
Adapter for
the back flow)
preventing
the back flow
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