Daikin ARXP20L5V1B, Installation Manual

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4 Installation
Installation manual
7
(A)RXP20~3 RXF20~3 RXF20~25B5V1B
R32 split series
3P519299-2H – 2019.09
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
(Ø)
Temper grade Thickness (t)
(a)
6.4 mm (1/4") Annealed (O) ≥0.8 mm
t
Ø
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? Distance
Maximum allowable pipe length 15 m
Minimum allowable pipe length 1.5 m
Maximum allowable height difference 12 m
3.2.3 Refrigerant piping insulation
▪ Use polyethylene foam as insulation material:
▪ with a heat transfer rate between 0.041 and 0.052 W/mK (0.035
and 0.045 kcal/mh°C)
▪ with a heat resistance of at least 120°C
▪ Insulation thickness
Pipe outer diameter
(Ø
p
)
Insulation inner
diameter (Ø
i
)
Insulation thickness
(t)
6.4 mm (1/4") 8~10 mm ≥10 mm
9.5 mm (3/8") 12~15 mm
Ø
i
Ø
i
t
Ø
p
Ø
p
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
1×
2
1
2
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).
20 mm
300
470
192
(mm)
192
>300
In heavy snowfall areas, it is recommended to provide at least
300 mm of free space below the unit. For other areas, it is
recommended to provide at least 150 mm of free space below the
unit.
In any case, make sure the unit is positioned at least 100 mm above
the maximum expected level of snow. If necessary, construct a
pedestal.