Amcor UCHW-H24AF2 - Manual (Page 22)

6
INSTALLATION & REPAIR GUIDE
Split Wall-Mounted air conditioner
*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.8.
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,close 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.
*
Air purging
*
After the pipieline connection is done,use a leakage inspection device or soap suds to carefully check
if there is any leakage at the joints.This is an imporant step to ensure the quality of installation.Once
a leakage is detected,proper treatment should be taken immediately.
Lo Hi
Indoor unit
Outdoor unit
Pressure gauge
Manifold gauge
Fig. 8
Vacuum pump
Union nut
Blank cap
Valve stem Charging
port
Service hose
*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 3 below.
Additional refrigerant amount
Liquid pipe diameter 6.35(1/4")
(piping length-5)mx30g
or (piping length-16)ftx0.3oz
Liquid pipe diameter: 9.52(3/8")
(piping length-5)mx65g
or (piping length-16)ftx0.7oz
Table 3
*Gas leakage inspection
2-way valve
3-way valve