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57
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1 Brown
2 Blue
For power supply, indoor outdoor
For power supply, indoor outdoor
1 2
Terminal block
Interconnecting wire
• Specified torquing value:
Liquid side (ø6.35) : 14~18N·m (1.4~1.8kgf·m)
Gas side (ø9.52) : 34~42N·m (3.4~4.2kgf·m)
Gas side (ø12.7) : 49~61N·m (4.9~6.1kgf·m)
• Use one more spanner to fix the valve.
¡ Remove the flared nuts.
(on both liquid and gas sides)
¡ Remove the flared nuts.
(on both liquid and gas sides)
¡ Install the removed flared nuts to the pipes to be
connected, then flare the pipes.
Dimension A
Liquid side
(ø6.35): 9.0 dia
Gas side
(ø9.52): 13.0 dia
(ø12.7): 16.2 dia
Press
Remove
Remove
(Do not
turn)
Spanner
for fixing
the piping)
Torque
wrench
• Specified torquing value:
Liquid side (ø6.35) : 14~18N·m (1.4~1.8kgf·m)
Gas side (ø9.52) : 34~42N·m (3.4~4.2kgf·m)
Gas side (ø12.7) : 49~61N·m (4.9~6.1kgf·m)
• Always use a Torque wrench and back up spanner to tighten the flare nut.
Manifold
Valve
-76 cm Hg
Handle Lo
(pressure)
Charge hose
Stop valve
(Two-way valve)
Service port
Stop value
(Three-way
value)
Compound
(Gauge)
Pressure
gauge
Handle Hi
(pressure)
Charge hose
Vacuum pump
2.5.3
Installation of outdoor unit
(1) Make sure that the unit is stable in installation. Fix the unit to
stable base.
(2) Perfrom wiring, making wire terminal numbers conform to ter-
minal numbers of indoor unit terminal block.
2.5.4
Connection of refrigerant pipings
(1) Preparation
Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them.
(a) Indoor unit side
(b) Outdoor unit side
(2) Connection of refrigerant piping
(a) Indoor unit side
• Connect firmly gas and liquid side
pipings by Torque wrench.
(b) Outdoor unit side
• Connect firmly gas and liquid side
pipings by Torque wrench.
(3) Air purge
(a) Tighten all flare nuts in the pipings both indoor and outside wall so as not to cause leak.
(b) Connect service valve, charge hose, manifold valve and vacuum pump as is illustrated below.
(c) Open manifold valve handle Lo to its full width, and perform vacuum or evacuation.
Continue the vacuum or evacuation operation for 15 minutes or more and check to see that the vacuum gauge reads – 0.1 MPa
(– 76 cmHg).
(d) After completing vacuum operation, fully open service valve (Both gas and liquid sides) with hexagon headed wrench.
(e) Detach the charge hoses.
(f) Check for possible leakage of gas in the connection parts of both indoor and outdoor.
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