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REFRIGERANT PIPING
Allowable Piping Length
If the pipe is too long, both the capacity and reliability of the unit will drop. As the number of bends increases, resistance
to the fl ow of refrigerant system increases, thus lowering cooling capacity. As a result, the compressor may become
defective. Always choose the shortest path and follow the recommendations as tabulated below:
*Be sure to add the proper amount of additional refrigerant. Failure to do so may result in reduced performance.
Remark:
The refrigerant pre-charged in the outdoor unit is for piping length up to 7.5m.
Additional Charge
The refrigerant is pre-charged in the outdoor unit. If the piping length is less than 7.5m, then additional charge after
vacuuming is not necessary. If the piping length is more than 7.5m, then use the additional charge value as indicated
in the table.
Additional refrigerant charge [g] per additional 1m length as tabulated
Model
FTXN25LV1B
FTXN35LV1B
FTXN50LV1B
FTXN60LV1B
Min. Allowable Length (L), m
3
3
Max. Allowable Length (L), m
20
30
Max. Allowable Elevation (E), m
10
10
Gas Pipe Size, mm/(in)
9.52 (3/8”)
12.70 (1/2’’)
15.88 (5/8’’)
Liquid Pipe Size, mm/(in)
6.35 (1/4”)
6.35 (1/4”)
Indoor
FTXN25LV1B
FTXN35LV1B
FTXN50LV1B
FTXN60LV1B
Outdoor
RXN25LV1B
RXN35LV1B
RXN50LV1B
RXN60LV1B
Additional charge [g/m]
20
20
20
20
Example:
FTXN25LV1B & RXN25LV1B with 12m piping length, additional piping length is 4.5m. Thus,
Additional charge = 4.5[m] x 20[g/m]
= 90.0[g]
Содержание R410A SPLIT SERIES FTXN25LV1B
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