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Installation
Piping Connection
•
1. Form the piping according to its routing. Avoid bending
and bending back the same piping point more than three
times. (This will result in hardening the pipe.)
2. After deforming the piping, align centers of the union
fitting of the indoor unit and the piping, and tighten them
firmly with wrenche s.
3. Connect pipe to the se rvice valve or ball valve which is
located below the outdoor unit.
4. After completing the piping connection, be sure to check
if there is gas leakage in indoor and outdoor connection.
V acuum d r ying
•
After completing the piping connection, execute vacuum
drying for the connecting piping and the indoor unit.
The vacuum drying must be car ried out using the se rvice
ports of both the liquid and gas side valves.
WARNING
Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress
air or Oxygen and do not use Flammable gases. Otherwise, it may cause fire or explosion.
- There is the risk of death, injury, fire or explosion.
CAUTION: Use two wrenches and
tighten with regular torque.
Flare nut fastening torque
Ø6.35mm
Ø9.52mm
Ø12.7mm
Ø15.88mm
Ø19.05mm
16
Ceiling Cassette Air Conditioner
1.8 kg . m
4.0 kg . m
5.5 kg . m
6.6 kg . m
6.6 kg . m
Liquid side
Outdoo r
Flare connection
uni t
Gas side
Flare connection
Indoor
unit
Union
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