installing the unit
REFRIGERANT PIPING WORKS
Additional refrigerant charging
• Additional refrigerant has to be charged according to the length and size of
liquid pipe.
• Example of additional refrigerant charging.
Pipe length is as below without distribution kit.
Ø12.70(1m/3.3´)
Ø12.70(5m/16.4´) Ø19.05(5m/16.4´)
Ø15.88(10m/32.8´)
Ø15.88(15m/49.2´)
Ø12.70(15m/49.2´)
Ø9.52(5m/16.4´)
Ø9.52(5m/16.4´)
Ø6.35(5m/16.4´)
Ø6.35(5m/16.4´)
Ø6.35(5m/16.4´)
Ø9.52(7m/22.9´)
Ø9.52(8m/26.2´)
Liquid pipe size
(O.D.)
Additional
refrigerant
charging
mm inches kg/m lbs/ft
Ø6.35 Ø1/4 0.020 0.0134
Ø9.52 Ø3/8 0.060 0.0403
Ø12.70 Ø1/2 0.125 0.0840
Ø15.88 Ø5/8 0.180 0.1210
Ø19.05 Ø3/4 0.270 0.1814
Ø22.23 Ø7/8 0.350 0.2352
Outdoor unit
Factory charging
kg lbs
RVXVHT075FE
RD075VHXFA
6.5 14.330
RVXVHT100FE
RD100VHXFA
7.5 16.535
RVXVHT125FE
RD125VHXFA
9.0 19.824
Additional refrigerant charging
of distribution kit (kg/m)
kg/m lbs/ft Remarks
Regardless of the liquid pipe size,
additional refrigerant charging is
0.01kg(0.0067lbs) per meter(ft) after
distribution kit.
0.01 0.0067
For wall-mounted &
ceiling Indoor unit
Liquid pipe size
(O.D.)
Total piping length
Additional refrigerant
charging
mm inches m ft kg lbs
Ø6.35 Ø1/4 15 49.21 0.300 0.6614
Ø9.52 Ø3/8 25 82.02 1.500 3.3069
Ø12.70 Ø1/2 21 68.90 2.625 5.7871
Ø15.88 Ø5/8 25 82.02 4.500 9.9208
Ø19.05 Ø3/4 5 16.40 1.350 2.9762
Total
10.275 22.652
• Total refrigerant amount of the system must be less then 100kg(220lbs). If total refrigerant
amount of system is over 100kg(220lbs) more, the system has to be divided into smaller system,
each containing less than 100kg(220lbs).
CAUTION
DVM PLUS3_IM_E_31180-4.indd 18 2009-12-21 ｿﾀﾈﾄ 1:11:29
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