Specifications

82
SRK-H
Indoor unit side Outdoor unit side
¡ 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
(φ6.35): 9-9.5 dia
Gas side
(φ9.52): 13.2-14 dia
(φ12.7): 16.2-17 dia
Press
Remove
Press
Remove
(Do not
turn)
2.5.4 Refrigerant piping
(1) Preparation
Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them.
(2) Connection of refrigerant piping
Indoor unit side
¡ Connect firmly gas and liquid side
pipings by Torque wrench.
¡ Specified torquing value:
Liquid side (ø6.35) : 15.7~19.6 N·m(1.6~2.0 kgf·m)
Gas side (ø12.7) : 39.2~49.0 N·m(4.0~5.0 kgf·m)
Outdoor unit side
¡ Connect firmly gas and liquid side
pipings by Torque wrench.
¡ Specified torquing value:
Liquid side (ø6.35): 15.7~19.6 N·m(1.6~2.0 kgf·m)
Gas side (ø12.7) : 39.2~49.0 N·m(4.0~5.0 kgf·m)
¡ Use one more spanner to fix the valve.
Spanner
(for fixing
the piping)
Torque
wrench
¡ Always use a Torque wrench and back up spanner to tighten the flare nut.
Stop valve
(Two-way valve)
Service port
Charge hose
Vacuum pump
Charge hose
Handle Hi
(pressure)
Manifold
valve
Pressure
gauge
Compound
(Gauge)
Stop valve
(Three-way
valve)
Handle Lo
(pressure)
–76 cm Hg
(3) Air purge
(a) Tighten all flare nuts in the pipings both indoor and outside wall so as not to cause leak.
(b) Connect operating 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
– 0.1MPa (– 76cm Hg).
(d) After completing vacuum operation, fully open operating valve (Both gas and liquid sides) with hexagon headed wrench.
(e) Check for possible leakage of gas in the connection parts of both indoor and outdoor.