6
REFRIGERANT PIPE CONNECTION
AIR PURGE
If there is air or nitrogen gas which isn't to be condensed in the pipes, outflow pressure rise, power loss, condenser heat-
ing, and air conditioner deterioration might occur, and therefore air purge is essential.
Air purge is supposed to use the pulsometer pump, and can also use additional refrigerant in the unit.
• Refrigerant pipe connection
After finishing connecting the refrigerant piping,
check any refrigerant leak and wrap it with insulation
material, and cover it again with vinyl tape.
Tighten the flare nuts with torque rule.
1. Connect the pipes of indoor/outdoor units.
In carrying out this work, tighten the flare nut 4 rather
loosely.(screwable with hand)
2. Remove the cap nuts 8, 9, 10, and tighten the cap
nut 7 1~2 seconds after screwing it with a angle of 90
counterclockwise with hexagon wrench. In doing this
work, tight the flare nut 4 completely.
3. Press the nut 6 2~3 times(1 time/3 sec.) and vacuum
the air in the service valve completely.
4. Open the gas/liquid side service valves fully with use
of hexagon wrench.
INDOOR
OUTDOOR
Warning
• Use two spanners in connecting the union to the flare
nut.
• Do not bend the pipes more than twice and work on
the longer radius.
• Do not remove the cap on the flare until the clamping
is done.