34
English
Extr
a Pr
oc
edur
es
Extra Procedures
Extra procedures
Pumping down refrigerant
WARNING
•
After installing the product, be sure to perform leak
tests on the piping connections. After pumping down
refrigerant to inspect or relocate the outdoor unit,
be sure to stop the compressor and then remove the
connected pipes.
‐
Do not operate the compressor while a valve is
open due to refrigerant leakage from a pipe or an
unconnected or incorrectly connected pipe. Failure
to do so may cause air to flow into the compressor
and too a high pressure to develop inside the
refrigerant circuit, leading to an explosion or
product malfunction.
Pump-down is an operation intended to collect all the
system refrigerant in the outdoor unit.
This operation must be carried out before disconnecting
the refrigerant pipe in order to avoid refrigerant loss to
the atmosphere.
1
Turn the system on in cooling with fan operating at
high velocity and then let the compressor run for more
than 5 minutes. (Compressor will immediately start,
provided 3 minutes have elapsed since the last stop.)
2
Release the valve caps on High and Low pressure side.
3
Use L-wrench to close the valve on the high pressure
side.
4
After approximately 2 minute, close the valve on the
low pressure side.
5
Stop operation of the air conditioner by pressing the
(Power) button on the indoor unit or remote control.
6
Disconnect the pipes.
Relocating the indoor and outdoor units
1
Pump down refrigerant. See
Pumping down
refrigerant
on page 34.
2
Remove the power cord.
3
Disconnect the assembly cable from the indoor and
outdoor units.
4
Remove the flare nuts connecting the indoor units and
the pipes. At this time, cover the pipes of the indoor
unit and the other pipes using a cap or vinyl plug to
avoid foreign material entering.
5
Disconnect the pipes connected to the outdoor units.
At this time, cover the valve of the outdoor units and
the other pipes using a cap or vinyl plug to avoid
foreign material entering.
Note: Make sure you do not bend the connection pipes in
the middle and store together with the cables.
6
Move the indoor and outdoor units to a new location.
7
Remove the mounting plate for the indoor unit and
move it to a new location.
NOTE
•
Before relocating the units, be sure to thoroughly read
Recovery
on page 6.
•
When recharging R-32 refrigerant after it has been
completely removed, be sure to charge only the factory
refrigerant amount.
•
When vacuuming the product, be sure to proceed for
at least 1 hour.
•
Be sure to use an electronic balance when measuring
the amount of refrigerant, and make sure that only the
specified amount is charged.
CAUTION
•
If more than the amount of refrigerant specified on the
label is charged, a fire may occur when the refrigerant
leaks.
A(Gas)
B(Liquid)
Summary of Contents for AJ NCJ2EG Series
Page 38: ......
