Purging Procedures, Leak Test, And Test Run - Mitsubishi Electric MXZ-3B54VA Notice D'installation

3-2. PIPE CONNECTION
cause refrigerant leakage.
Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit in the same
manner applied for indoor unit.
• For tightening, use a torque wrench or spanner and use the same
tightening torque applied for indoor unit.
3-3. INSULATION AND TAPING
unit.
• When piping have to be arranged through above ceiling, closet or

4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN

4-1. PURGING PROCEDURES AND LEAK TEST
gas pipe. (The stop valve will not work in its initial state fresh out of
stop valve on the gas pipe side of the outdoor unit.
manifold valve, and stop the vacuum pump.
valve.
stop valves on both sides of gas pipe and liquid pipe. Operating with-
fect performance of the air conditioner.
4-2. GAS CHARGE
Perform gas charge to unit.
conditioner for cooling.
Note:
CAUTION:
will be locked.
6
WARNING
When installing the unit, securely
connect the refrigerant pipes before
starting the compressor.
-
-
Stop valve cap
Hexagonal wrench
-
Service port cap
•cm
Stop valve
for GAS
Precautions when using
the control valve
Close
A
-
Open
Control
Service port
valve
Charge hose
Union
Indoor
unit
Union
-
Refrigerant gas
operating valve
Electronic scale for
refrigerant charging
Compound pressure
Handle
Low
Charge hose
Stop valve
Vacuum pump
for LIQUID
When attaching the control valve to
form or loosen if excess pressure is
When attaching the control valve to
the service port, make sure that the
valve core is in closed position, and
then tighten part A. Do not tighten
core is in open position.
Union
Stop valve
Liquid pipe
Stop valve with
service port
Gas pipe
Union
Gauge manifold
Pressure gauge
Gauge manifold
Handle High
-
Outdoor
unit