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3.2
Preparing refrigerant piping
3.2.1
Refrigerant piping requirements
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Piping diameter:
Liquid piping
Ø6.4 mm (1/4")
Gas piping
Ø9.5 mm (3/8")
▪ Piping temper grade and thickness:
Outer diameter
Temper grade
(Ø)
6.4 mm (1/4")
Annealed (O)
≥0.8 mm
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
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
(A)RXP20~35M5V1B
R32 split series
3P519299-5B – 2018.12
(a)
Thickness (t)
Ø
4.2
t
4.2.1
Prepare 4 sets of M8 or M10 anchor bolts, nuts and washers (field
supply).
Distance
15 m
1.5 m
12 m
Insulation thickness
)
(t)
i
≥10 mm
(mm)
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. In this case, it is
recommended to construct a pedestal.
4.2.2
4 Installation
2
2
Mounting the outdoor unit
To provide the installation structure
To install the outdoor unit
4× M8/M10
1×
1
Installation manual
5
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