Connecting Up And Removing Air In The Circuit - Samsung ACH2400C Owner's Instructions & Installation Manual

Cassette-type air conditioner (cool and heat)
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Connecting Up and Removing Air In the Circuit

The outdoor units is loaded with sufficient "C" refrigerant for 5 metres(16 ft) of
piping. The air in the indoor unit and in the pipe must be purged. If air remains in
the refrigeration pipes, it will affect the compressor, reduce to cooling/heating
capacity and could lead to a malfunction. Refrigerant for air purging is not
charged in the outdoor unit. Use Vacuum Pump as shown at the figure.
Adding Refrigerant
Refrigerant must be added if the piping measures more than 5 m(16 ft) in
length (maximum of "A" m/ft). The quantity of additional refrigerant is
variable according to the installation situation. Thus, make sure the outdoor
unit situation before adding refrigerant. This operation can only be performed
by a qualified refrigeration specialist.
If you have used...
More than 5 m(16 ft)
of the pipes
Less than 5 m(16 ft)
of piping
1
Connect each assembly pipe to the appropriate valve on the outdoor unit
and tighten the flare nut.
2
Referring to the illustration opposite, tighten the flare nut on section B first
manually and then with a wrench, applying the following torque.
Outer Diameter
9.52 mm (3/8")
15.88 mm (5/8")
3
Connect the charging hose of low pressure side of manifold gauge to the
packed valve having a service port as shown at the figure.
4
Open the valve of the low pressure side of manifold gauge counter
clockwise.
5
Purge the air from the system using vacuum pump for about 10 minutes.
N Close the valve of the low pressure side of manifold gauge clockwise.
N Make sure that pressure gauge show -0.1MPa(-76cmHg) after about
10 minutes. This procedure is very important in order to avoid gas leak.
N Turn off the vacuum pump.
N Remove the hose of the low pressure side of manifold gauge
maintaining a vacuum.
6
Set valve cork of both liquid side and gas side of packed valve to the
open position.
7
Mount the valve stem nuts and the service port cap to the valve, and
tighten them at the torque of
8
Check for gas leakage.
N At this time, especially check for gas leakage from the 3-way valve's
stem nuts(A port), and from the service port cap.
Then...
2
"B" of refrigerant (R-22) must be
5
added for each extra metre.
2
The purge time is normal
5
Torque (kgf•cm)
3
300(21 ft•lb)
4
400(29 ft•lb)
183kgf•cm(13ft•lb) with a torque wrench.
2
5
2
5
Model
ACH2400C
ACH2800C
For details about the installation
situation(a or b), refer to page 46.
Outdoor unit
A
B
B(liquid)
3-way valve
B
A
a
b
40g
50g
30m
(0.43oz)
(0.54oz)
(100ft)
Indoor unit
C
Gas pipe side
Liquid pipe side
D
Vacuum
pump
A(gas)
51
E-

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