Acson 5SL Serie Manuel D'installation page 15

Purging The Piping And The Indoor Unit
Except for the outdoor unit which is pre-charged with
refrigerant, the indoor unit and the refrigerant
connection pipes must be air-purged because the
aircontaining moisture that remains in the refrigerant cycle
may cause malfunction of the compressor.
• Remove the caps from the valve and the service port.
• Connect the center of the charging gauge to the vacuum
pump.
• Connect the charging gauge to the service port of the
3-way valve.
• Start the vacuum pump. Evacuate for approximately 30
minutes. The evacuation time varies with different
vacuum pump capacity. Confirm that the charging gauge
needle has moved towards -76mmHg (0~76mmHg).
Caution
• If the gauge needle does not move to 0~76mmHg,
be sure to check for gas leaks (using the refrigerant
detector) at flare type connection of the indoor and
outdoor unit and repair the leak before proceeding
to the next step.
• Close the valve of the changing gauge and stop the
vacuum pump.
• On the outdoor unit, open the suction valve (3 way) and
liquid valve (2 way) (in anti-clockwise direction) with
4mm key for hexagon sacked screw.
Allen Key
Flare Nut
Service Port
Liquid Side
Indoor Unit
Gas Side
Open
Vacuum
Hi
Pump
Low
Close
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VACUUMING AND CHARGING
Refrigerant Piping
Outdoor Unit
3 Ways Valve
Outdoor Unit
Discharge Valve
Close
Suction Valve
Close
1-13
Additional Charge
The refrigerant is pre-charged in the outdoor unit. If the piping
length is less than 7.6m, then additional charge after
vacuuming is not necessary. If the piping length is more than
7.6m, then use the additional charge valve as indicated in the
table below.
Cooling Only (R22)
Indoor CE15/20E CE25E
Outdoor SL15/20C SL25C
Additional
16
Charge [g/m]
Cooling Only (R410A)
Indoor 5CE15E 5CE20E 5CE25E
Outdoor 5SL15C 5SL20C 5SL25C 5SL28C 5SL30C
Additional
9 10
Charge [g/m]
Heat Pump (R22)
Indoor CE15ER CE20ER CE25ER
Outdoor SL15CR SL20CR SL25CR SL28CR SL30CR
Additional
24 22
Charge
[g/m]
Heat Pump (R410A)
Indoor 5CE15/20ER 5CE25ER
Outdoor 5SL15/20CR 5SL25CR 5SL28CR 5SL30CR
Additional
16
Charge
[g/m]
E.g. CE20E & SL20C with 15m piping length, additional piping
length is 7.4m. Thus,
Additional Charge = 7.4[m] x 16[g/m]
= 118.4[g]
CE28E
SL28 C SL30C
39 39
5CE28E
10 24
CE28ER
22 56
5CE28ER
10 38