Daikin RZASG100M7V1B, Installer'S Reference Manual

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5 Preparation
Installer reference guide
9
RZASG71~Y1
Sky Air Advance-series
4P486047-1 – 2017.04
5.2.2 Additional installation site requirements
of the outdoor unit in cold climates
Protect the outdoor unit against direct snowfall and take care that the
outdoor unit is NEVER snowed up.
a
b
c
c
d
a Snow cover or shed
b Pedestal (minimum height=150 mm)
c Prevailing wind direction
d Air outlet
5.3 Preparing refrigerant piping
5.3.1 Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
When connecting multiple indoor units to the outdoor unit, mind the
following:
Refrigerant branch kit One or more refrigerant branch kits are
required. See "4.3.1 Possible options for the
outdoor unit" on page 7 .
Upward and
downward piping Perform upward and downward piping only
on the main piping line (L1).
Branch pipes ▪ Install the branch pipes horizontally (with a
maximum inclination of 15°) or vertically.
▪ Make the length of the branch pipes to the
indoor units as short as possible.
▪ Try to keep length of the branch pipes to
the indoor units equal.
Definitions: L1~L7, H1, H2
Pair
(a)
H1
L1
Twin
(a)
H1
H2
L1
L2
L3
Triple
(a)
L2
L3
L4
H1
H2
L1
Double twin
(a)
H1
H2
L1
L2
L3
L4
L5
L6
L7
(a) Assume that the longest line in the illustration corresponds
with the actual longest pipe, and the highest unit in the
illustration corresponds with the actual highest unit.
L1 Main piping
L2~L7 Branch piping
H1 Height difference between the highest indoor unit and the
outdoor unit
H2 Height difference between the highest and the lowest
indoor unit
Refrigerant branch kit
Refrigerant piping material
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Piping temper grade and thickness:
Outer diameter
(Ø)
Temper grade Thickness (t)
(a)
6.4 mm (1/4")
9.5 mm (3/8")
12.7 mm (1/2")
Annealed (O) ≥0.8 mm
t
Ø
15.9 mm (5/8") Annealed (O) ≥1.0 mm
19.1 mm (3/4") Half hard (1/2H)
(a) Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.
▪ 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
RZASG71 Standard Ø9.5 mm Ø15.9 mm
RZASG100~140 Standard Ø9.5 mm Ø15.9 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.