16
2)
Connect the charge hose with the push pin of
handle lo to the 3-way valves gas service port.
3)
Air purging of the charge hose. Open the handle Lo
valve of the manifold valve slightly to purge air
from the charge hose for 5 seconds and then
close it quickly.
4)
Set the 2-way valve to the close position.
5)
Operate the air conditioner at the cooling cycle and
stop it when the gauge indicates 0.1MPa.
6)
Set the 3-way valve to the closed position
immediately
Do this quickly so that the gauge ends up indicating
0.3 to 0.5Mpa.
Disconnect the charge set, and tighten the 2-way
and 3-way valve’s stem nuts.
Use a torque wrench to tighten the 3-way valves
service port cap to a torque of 18N.m.
Be sure to check for gas leakage.
2. Air purging by the refrigerant
Procedure:
5)
Discharge the refrigerant. Close the valve on the
charging cylinder and discharge the
refrigerant by loosening the flare nut on the
2-way valve approximately 45’ until the gauge
indicates 0.3 to 0.5 Mpa.
6)
Disconnect the charge set and the charging
cylinder, and set the 2-way and 3-way valves to
the open position. Be sure to use a hexagonal
wrench to operate the valve stems.
7)
Mount the valve stems nuts and the service
port cap. Be sure to use a torque wrench
to tighten the service port cap to a torque
18N.m. Be sure to check the gas leakage.
5.7 Re-installation while the outdoor unit needs to
be repaired
1. Evacuation for the whole system
Procedure:
1)
Confirm that both the 2-way and 3-way valves
are set to the opened position.
2)
Connect the vacuum pump to 3-way valve’s
service port.
3)
Evacuation for approximately one hour. Confirm
that the compound meter indicates -0.1Mpa.
4)
Close the valve (Low side) on the charge set, turn
off the vacuum pump, and confirm that the
gauge needle does not move (approximately
5 minutes after turning off the vacuum pump).
5)
Disconnect the charge hose from the vacuum
pump.
2. Refrigerant charging
Procedure:
1)
Connect the charge hose to the charging cylinder,
open the 2-way valve and the 3-way valve.
Connect the charge hose which you disconnected
from the vacuum pump to the valve at the bottom
Summary of Contents for DA1221-H2-I
Page 1: ...DuctlessAire ES Series Service Manual 2016 ABSSA B4 1601 ...
Page 8: ...6 For DA1221 H2 I For DA1821 H2 I DA2421 H2 I ...
Page 10: ...8 For DA1221 H2 O ...
Page 11: ...9 For DA1821 H2 O ...
Page 12: ...10 For DA2421 H2 O ...
