Model
Indoor FVN30AV1L
RN28CV1
FVN40AV1L
RN40DY1
FVN50AV1L
RN50DY1
FVN60AV1L
RN61DY1
Outdoor
Max. allowable length (m) 45
25
45
25
45
25
45
25
Max. allowable elevation (m)
Liquid pipe size, mm/(in)
9.52
(3/8”)
9.52
(3/8”)
9.52
(3/8”)
9.52
(3/8”)
Gas pipe size, mm/(in)
15.88
(5/8”)
15.88
(5/8”)
15.88
(5/8”)
19.05
(3/4”)
Refrigerant Piping Work
NOTE
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 the piping length up to 7.5m.
Example:
FVN30AV1L & RN28CV1 with 13m piping length, additional piping length is 5.5m. Thus,
Additional charge = 5.5[m] x 50[g/m]
= 275[g]
roodnI
roodtuO
Additional charge [g/m] 50 50 50 50
Additional refrigerant charge [g] per additional 1m length as tabulated (for R410A models)
Additional Charge
The refrigerant is pre-charge 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.
Refrigerant piping is important in particular. Refrigeration cycle of the split air conditioner is realized by
the perfect piping work.
Allowable Pipe Length and Elevation
If the piping is too long, both the capacity and reliability of unit will drop. As the number of bends
increase, resistance to flow of refrigerant system increases, thus lowering cooling capacity and as a
result the compressor may become defective.
Always choose the shortest path and follow the recommendation as tabulated below.
FVN30AV1L
RN28CV1
FVN40AV1L
RN40DY1
FVN50AV1L
RN50DY1
FVN60AV1L
RN61DY1
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