5 Preparation
Installer reference guide
10
RZQG71~Y1 + RZQSG100~Y1
Split system air conditioners
4P385522-1A – 2016.10
▪
Flare connections:
Only use annealed material.
Refrigerant piping diameter
The refrigerant piping diameters must comply with the following:
Piping
Diameter
L1 (pair, twin, triple, double twin) See below.
L2,L3 (twin)
L2~L4 (triple)
L4~L7 (double twin)
Use the same diameters as the
connections (liquid, gas) on the
indoor units.
L2,L3 (double twin)
Liquid piping: Ø9.5 mm
Gas piping: Ø15.9 mm
L1 (pair, twin, triple, double twin):
Model
New
(a)
/
Existing
(b)
L1 liquid
piping
L1 gas piping
RZQG71
Size‑down
Ø6.4 mm
Ø12.7 mm
Standard
Ø9.5 mm
Ø15.9 mm
Size‑up
Ø12.7 mm
—
RZQG100~140
RZQSG100~140
Size‑down
Ø6.4 mm
—
Standard
Ø9.5 mm
Ø15.9 mm
Size‑up
Ø12.7 mm
Ø19.1 mm
(a)
When installing
new piping
, use the same diameters as
the connections on the outdoor units (i.e.
standard
diameters for liquid and gas piping).
(b)
When reusing
existing piping
, you may use the
size‑up
or
size‑down
diameters, but then capacity might decrease,
and stricter piping length requirements are applicable.
Assess these limitations in relation to the complete
installation.