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7
Table 1
Torque based upon the wrench to be used
Outer diameter of copper pipe
Tightening torque
Strengthened tightening torque
Ø 6.35(1/4”)
160kgf.cm(63kgf.inch)
200kgf.cm(79kgf.inch)
Ø 9.52(3/8”)
300kgf.cm(118kgf.inch)
350kgf.cm(138kgf.inch)
Ø 12.7(1/2”)
500kgf.cm(197kgf.inch)
550kgf.cm(216kgf.inch)
Ø 15.88(5/8”)
750kgf.cm(295kgf.inch)
800kgf.cm(315kgf.inch)
Ø 19.05(3/4”)
1200kgf.cm(472kgf.inch)
1400kgf.cm(551kgf.inch)
p
Air purging with vacuum pump
1. Check that pipelines connection have been
properly connected.remove the charging port
cap,and connect the manifold gauge and the
vacuum pump to the charging valve by service
hoses as shown Fig.6.
2. Open the valve of the low pressure side of
manifold gauge,then,run the vacuum pump.
Vacuum the indoor unit and the connecting
pipes until the pressure in them lowers to below
1.5mmHG(The operation time for vacuuming is
about 10 minutes). When the desired vacuum is
reached.dose the valve of the low pressure of
the manifold and stop the vacuum pump.
3. Disconnect the service hoses and fit the cap to
the charging valve.
4. Remove the blank caps, and fully open the
spindles of the 2-way and 3-ways valves with a
service valve wrench.
5. Tighten the blank caps of the 2-way and 3-ways
valves,applying the above torque Table 1.
p
Adding refrigerant
Refrigerant must be added if the piping measures
more than 5 metres(16’5”) in length.This operation
can only be performed by a professional technician
for the additional amount,see the table 2 below.
Table 2
Additional refrigerant amount
Liquid pipe diameter
Ø6,35 (1/4”)
Liquid pipe diameter:
Ø9.52(3/8”)
(piping length-5)mx30g
or (piping Iength-16)
ftx0.3oz
(piping Iength-5)mx65g
or (piping Iength-16)
ftx0.7oz
/R
+L
Indoor unit
Outdoor unit
3-way valve
2-way valve
Union nut
Blank cap
Charging
port
Valve stem
Manifold
gauge
Pressure
gauge
Service
hose
Vaacum pump
Fig. 6