48
AY-X10CR
AE-X10CR
AY-X10CR-N
AE-X10CR-N
h) After securintg the caps on the service port and control valve, check the capsÅfperiphery to see if there is
any gas leakage.
6
7
Refrigerant cylinder
(with syphon)
1
4
5
3
6
7
7
2
(Indoor unit)
(Liquid side)
Control valve
(2-way)
Control valve
(3-way)
Opened
Opened
Service port
Service port
Charging
valve
Electronic balance for
refrigerant charging
(Gas side)
(Outdoor unit)
Fig. 7 Configuration of Additional Refrigerant Charging
3.3 Removal (When Using New Refrigerant Piping)
(1) Removing the Unit
a) Recovery of Refrigerant from the Outdoow Unit by Pump Down
At the time of pump down, use a gauge manifold exclusive for R410A.
Operating the unit in forced cooling mode, recover refrigerant from the outdoor unit.
(For details of reclaiming steps and precautions, see the instruction manual prepared by the equipment
maunfacturer)
Caution:
In the case of an outdoor unit which is inacapable pump down, use a refrigerant recovery unit.
b) Removing the Indoor/Outdoor Units
Remove the piping and wiring between the indoor an outdoor units.
Tighten the outdoor unitÅfs control valves and service port with the specified torque.
Tighten the capped flare nuts at the indoor/outdoor units connecting part with the specified torque.
Remove the indoor/outdoor units.
CAUTION
When storing the indoor unit piping in its original position, be careful not to break the piping.
(2) Installing the Unit
a) Proceed with the installation following the steps described in "3.2 New Installation Work" .
3.4 Replacing the Unit (Never Use the Existing Refrigerant Piping)
Use a brand-new refrigerant piping (1) when replacing the air conditioner using the conventional refrigerant (R22)
with an air conditioner using the alternative refrigerant (R410A) or (2) even when replacing the air conditioner using
the alternative refrigerant (R410A) with another air conditioner using R410A, as a problem may occur due to
differences in pressure characteristics of refrigerant or differences in type of lubricating oil (air conditioners using
R410A do not always use the same type of the lubricating oils) .
3.5 Retrofitting
Do not operate the air conditioner which has used the conventional refrigerant (R22) by charging the altemative
refrigerant (R410A) . Otherwise, the equipment may cease to function normally and go wrong, or even cause
serious problems such as rupture of the refrigeration cycle.
