70 PB
INSTALLATION
24 and 36k Outdoor Units
Piping Work and Refigerant Charge
Pipe length L
Indoor unit
Outdoor unit
Model
Max. Pipe Max. Height
difference (H)length (L)(L)
9K/12K
Add. Refrigerant
[exceed 2
ft. (7.6m)]
)m52( .tf 28 )m01( .tf 33 )m/g51 ( t f /zo 161 . 0
98 ft. (30m) 49 ft. (15m)18K 0.161 oz/ft (15g/m)
24K/36K 98 ft. (30m) 0.376 oz/ft (35g/m)
164 ft. (50m)
1) To avoid storing too much oil in the oil trap, the oil trap should be as short as possible.
2) The horizontal piping should slope down along the refrigerant flow direction, to bring the oil
back to compressor , the slope is about 1/200 to1/250.
3) In order to ensure cooling/heating performance better, the refrigerant piping should be as short
and straight as possible.
NOTE:
13.2 Oil trap
When the indoor unit is lower than outdoor unit and height difference is larger than 16.4 ft (5m),
set an oil trap every 16.4 ft (5m) (height difference) on suction piping.
Oil trap
Slope: 1/200~1/250
Slope: 1/200~1/250
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