3. Electrical data
20 SS-SVM001A-EM
4.2 Piping length correction factor
The correction factor is based on the equivalent piping length in meters (EL)
and the height difference between outdoor and indoor units in meters (H).
H:
Height difference between indoor unit and outdoor unit (m).
• H>0: Position of outdoor unit is higher than that of the indoor unit (m).
• H<0: Position of outdoor unit is lower than that of the indoor unit (m).
L:
Actual one-way piping length between indoor unit and outdoor unit (m).
EL: Equivalent one-way piping length between indoor unit and outdoor unit (m).
Note:
If the size of indoor gas pipe valve is different from the outdoor’s gas pipe valve, a pipe adaptor
will be needed for connecting the pipe.
Cooling:
The correction factor of height between indoor unit and outdoor unit
To ensure correct unit selection, consider the farthest indoor unit.
Note:
1. Above data is assuming that the height difference between
indoor unit and outdoor unit is 0m.
2. Be sure to minimize length of connection pipes to optimize performance. If the
outdoor unit is installed higher or lower than the indoor unit, it is necessary to apply
height correction factor additionally to length correction factor to calculate cooling.
If outdoor unit is higher, correction should be applied to cooling capacity.
Gas Pipe
Diameter
(mm/inch)
9.52 (3/8’) 12.7 (1/2’) 15.88 (5/8’) 19.05 (3/4’) 22.22 (7/8’)
90º Elbow (m) 0.15 0.20 0.25 0.35 0.40
25(7.6) 30(10) 50(15) 75(23) 100(30) 131(40) 150(45) 164(50)
36K 1. 0 0 0.99 0.94 0.88 0.83 0.78 -- --
48K 1. 0 0 0.99 0.95 0.91 0.90 0.87 0.82 0.82
60K 1. 0 0 0.99 0.96 0.93 0.90 0.87 0.82 0.85
Model
EL
[ft(m)]
Height difference 16ft (5m) 33ft (10m) 108ft (30m)
Factor 0.010 0.020 0.025
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