Daikin RZQG71L9V1B Installer's Reference Manual page 10

5 Preparation
▪ Flare connections: Only use annealed material.
Refrigerant piping diameter
The refrigerant piping diameters must comply with the following:
Piping
L1 (pair, twin, triple, double twin) See below.
L2,L3 (twin)
L2~L4 (triple)
L4~L7 (double twin)
L2,L3 (double twin)
L1 (pair, twin, triple, double twin):
(a)
Model New /
(b)
Existing
RZQG71 Size‑down
Standard
Size‑up
RZQG100~140 Size‑down
Standard
RZQSG100~140
Size‑up
(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.
Installer reference guide
10
Diameter
Use the same diameters as the
connections (liquid, gas) on the
indoor units.
Liquid piping: Ø9.5 mm
Gas piping: Ø15.9 mm
L1 liquid L1 gas piping
piping
Ø6.4 mm Ø12.7 mm
Ø9.5 mm Ø15.9 mm
Ø12.7 mm —
Ø6.4 mm —
Ø9.5 mm Ø15.9 mm
Ø12.7 mm Ø19.1 mm
RZQG71~140L_V1+Y1 + RZQSG100~140L_V1+Y1
Split system air conditioners
4P385522-1A – 2016.10