Daikin RXTP25N2V1B8, Руководство по установке

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5 Piping installation
Installation manual
12
4 35
35 3 RXTA30N2V1B
R32 split series
3P482320-10S – 2020.08
330
524
211
(mm)
211
a
a 100 mm above expected level of snow
4.2.2 To install the outdoor unit
4× M8/M10
4.2.3 To provide drainage
NOTICE
If the unit is installed in a cold climate, take adequate
measures so that the evacuated condensate CANNOT
freeze.
INFORMATION
For information on the available options, contact your
dealer.
5 Piping installation
5.1 Preparing refrigerant piping
5.1.1 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 maximum
working pressure of the unit (see "PS High" on the unit name
plate), larger piping thickness might be required.
5.1.2 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.
5.1.3 Refrigerant piping length and height
difference
What? Distance
Maximum allowable pipe length 20 m
Minimum allowable pipe length 1.5 m
Maximum allowable height difference 15 m
5.2 Connecting the refrigerant piping
DANGER: RISK OF BURNING/SCALDING
CAUTION
▪ No brazing or welding on site for units with R32
refrigerant charge during shipment.
▪ During installation of the refrigeration system, joining of
parts with at least one part charged shall be performed
taking into account the following requirements:
ð
inside occupied spaces non permanent joints are not
allowed for R32 refrigerant except for site made joints
directly connecting the indoor unit to piping. Site made
joints directly connecting piping to indoor units shall
be of non permanent type.
WARNING
▪ Only use R32 as refrigerant. Other substances may
cause explosions and accidents.
▪ R32 contains fluorinated greenhouse gases. Its global
warming potential (GWP) value is 675. Do NOT vent
these gases into the atmosphere.
▪ When charging refrigerant, ALWAYS use protective
gloves and safety glasses.