Preparing Refrigerant Piping; Refrigerant Piping Requirements; Refrigerant Piping Length And Height Difference; Refrigerant Piping Insulation - Daikin RXP20M5V1B Manuel D'installation

c
a Snow cover or shed
b Pedestal
c Prevailing wind direction
d Air outlet
In any case, provide at least 300 mm of free space below the unit.
Additionally, make sure the unit is positioned at least 100 mm above
the maximum expected level of snow. See
outdoor unit" on page 5 for more details.
In heavy snowfall areas it is very important to select an installation
site where the snow will NOT affect the unit. If lateral snowfall is
possible, make sure that the heat exchanger coil is NOT affected by
the snow. If necessary, install a snow cover or shed and a pedestal.
See also
2 4.2 Mounting the outdoor unit [} 5]
3.2

Preparing refrigerant piping

3.2.1

Refrigerant piping requirements

▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Piping diameter:
Liquid piping
Gas piping
▪ Piping temper grade and thickness:
Outer diameter Temper grade
(Ø)
6.4 mm (1/4") Annealed (O)
9.5 mm (3/8") Annealed (O)
(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.
3.2.2 Refrigerant piping length and height
difference
What?
Maximum allowable pipe length
Minimum allowable pipe length
Maximum allowable height difference
(A)RXP20~35M5V1B
R32 split series
3P519299-5B – 2018.12
a
c
b
"4.2 Mounting the
Ø6.4 mm (1/4")
Ø9.5 mm (3/8")
(a)
Thickness (t)
Ø
≥0.8 mm
t
Distance
15 m
1.5 m
12 m
3.2.3

Refrigerant piping insulation

Pipe outer diameter Insulation inner
(Ø ) diameter (Ø
p
6.4 mm (1/4") 8~10 mm
9.5 mm (3/8") 12~15 mm
Ø Ø
i i
Ø Ø
p p
t
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
4

Installation

4.1

Opening the units

4.1.1

To open the outdoor unit

DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
4.2

Mounting the outdoor unit

4.2.1

To provide the installation structure

Prepare 4 sets of M8 or M10 anchor bolts, nuts and washers (field
supply).
4 Installation
Insulation thickness
) (t)
i
≥10 mm
1×
2
1
2
Installation manual
5