Daikin RZQG71L9V1B, Installer'S Reference Manual

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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.