Sanyo ECO G SGP-EW120M2G2W, Technical Data Manual

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System Design
3. Refrigerant piping design
D-6
(1) System piping
1) Limitations on refrigerant piping length
2) Ranges for Refrigerant Tubing Length and Installation Height Difference
Category Symbol Description Tubing Length [m]
L1 Max. allowable tubing length
170
(Equivalent length 200)
L = (L2 – L4)
Difference between longest and shortest
tubing lengths after the No. 1 branch (first
branching point)
40
LM*
1
Max. length for main tube (tube with widest
diameter)
120
1, 2 to 48 Max. length for each tube branch 30
Allowable tubing
Length
L5*
2
Distance between outdoor units 10
If outdoor unit is
above
50
H1
Max. height difference
between indoor and
outdoor units
If outdoor unit is
below
35
*3
H2 Max. height difference between indoor units 15
Allowable Height
Difference
H3*
2
Max. height difference between outdoor
units
4
Allowable length
for branched
tubing
(header branch)
L3
Max. length between first T-tee branch
(provided by installer) and the closed tube
end
2
*1. The minimum length for the main tubing is 7 m.
*2. The maximum length for balance tubes is 10 m.
*3. If cooling mode is expected to be used when the external temperature is 10°C or below, the
maximum length is 30 m.