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1.5.3 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.
1
Brown
For power supply, indoor outdoor
2
Blue
For power supply, indoor outdoor
1.5.4 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
(Do not
turn)
¡ Remove the flared nuts.
(on both liquid and gas sides)
(2) Connection of refrigerant piping
(a) Indoor unit side
• Connect firmly gas and liquid side
pipings by Torque wrench.
Spanner
for fixing
the piping)
Torque
wrench
• Specified torquing value:
Liquid side (ø6.35)
Gas side (ø9.52)
Gas side (ø12.7)
• Always use a Torque wrench and back up spanner to tighten the flare nut.
(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.
(b) Outdoor unit side
Remove
¡ Remove the flared nuts.
(on both liquid and gas sides)
: 14~18N·m (1.4~1.8kgf·m)
: 34~42N·m (3.4~4.2kgf·m)
: 49~61N·m (4.9~6.1kgf·m)
Service valve
(Two-way valve)
Service port
Press
Remove
(b) Outdoor unit side
• Connect firmly gas and liquid side
pipings by Torque wrench.
• Specified torquing value:
Liquid side (ø6.35)
Gas side (ø9.52)
Gas side (ø12.7)
• Use one more spanner to fix the valve.
Compound
Pressure
(Gauge)
gauge
-76 cm Hg
Handle Lo
(pressure)
Service valve
(Three-way
valve)
Charge hose
24
-
-
Terminal block
Interconnecting wire
Dimension A
Liquid side
(ø6.35): 9.0 dia
Gas side
(ø9.52): 13.0 dia
(ø12.7): 16.2 dia
¡ Install the removed flared nuts to the pipes to be
connected, then flare the pipes.
: 14~18N·m (1.4~1.8kgf·m)
: 34~42N·m (3.4~4.2kgf·m)
: 49~61N·m (4.9~6.1kgf·m)
Manifold
Valve
Handle Hi
(pressure)
Charge hose
Vacuum pump
1 2
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