Pumping Down - Mitsubishi Electric MSY-A24NA Installation Manual

5=1. REMOVING AND INSTALLING THE PANEL ASSEMBLY
Removal procedure
1) Remove the 3 screws which fix the panel assembly.
2) Remove the panel assembly. Be sure to remove its bottom end first.
1
1
2
installation procedure
1) Point the horizontal vane slightly downward.
(Fig. 1)
2) Attach the bottom of the front panel under the horizontal vane.
3) Fit in the top of the front panel.
4) Fit in the bottom of the front panel and tighten it using screws.
5) Push the section of the front panel marked by the arrows to close the front panel
securely.
5-2. REMOVING THE INDOOR UNIT
Remove the bottom of the indoor unit from the installation plate.
1 ) Remove the front panel. (Refer to 5-1 )
2) Insert flat screwdrivers into the square holes at the left and right bottom of the indoor
unit and push them up; the bottom of the indoor unit goes down and the hooks are
released.
"1 Remove the screw.
*2 Remove the tab of corner box from the indoor unit, and pull the corner box.
*3 Pull the indoor unit to remove.
5 3,_
4
Horizontal vane
Fig. 1 Fig. 2
Square hole
5-3. PUMPING DOWN
When relocating or disposing of the air conditioner, pump down the system following the
procedure below so that no refrigerant is released into the atmosphere.
1) Connect the gauge manifold valve to the service port of the stop valve on the gas
pipe side of the outdoor unit.
2) Fully close the stop valve on the liquid pipe side of the outdoor unit.
3) Close the stop valve on the gas pipe side of the outdoor unit almost completely so
that it can be easily closed fully when the pressure gauge shows 0 MPa [Gauge] (0
Ibf/in. 2 [0 kgf/cm2]).
4) Start the emergency COOL operation.
To start the emergency operation in COOL mode, disconnect the power supply plug
and/or turn off the breaker. After 15 seconds, connect the power supply plug and/or
turn on the breaker, and then press the E.O. SW once. (The emergency COOL op-
eration can be performed continuously for up to 30 minutes.)
5) Fully close the stop valve on the gas pipe side of the outdoor unit when the pressure
gauge shows 0.05 to 0 MPa [Gauge] (approx. 7.25 to 0 Ibf/in 2 [0.5 to 0 kgf/cm2]).
6) Stop the emergency COOL operation.
Press the E.O. SW twice to stop the operation.
MITSUBISHI ELECTRIC CORPORATION
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO
100-8310, JAPAN