18
Refrigerant piping
Pipe insulating instructions and cautions
Make sure to check for gas leakage before completing the installation (hose and pipe insulation) and insulate hoses and pipes
when there is no sign of leakage.
1. To avoid condensation problems, place T13.0 (1/2") or thicker Acrylonitrile
Butadien Rubber separately around each refrigerant pipe.
No gap
NBR(T13.0(1/2") or thicker)
CAUTION
• When installing pipe insulation, make sure that the insulation seam
is on the top of the pipes.
2. Wrap insulating tape around the pipes. Avoid compressing the pipe insulation
while wrapping.
3. Finish wrapping insulating tape around the rest of the pipes leading to the
outdoor unit.
4. Pipes and electrical cables connecting the unit with the outdoor unit must be
secured to the structure with appropriate straps/hangers.
MISE EN GARDE
• L'ajustement doit être
eectué fermement
contre le corps, sans
aucun espace.
CAUTION
• Must t tightly against
body without any gap.
Insulation cover pipe
Insulation pipe
Indoor unit
Be sure to overlap
the insulation
MISE EN GARDE
• Tous les raccords des tuyaux de réfrigérant doivent être accessibles
an de permettre l'entretien de l'appareil ou son retrait complet.
CAUTION
• All refrigerant connection must be accessible, in order to permit
either unit maintenance or removing it completely.
5. Select the insulation of the refrigerant pipe.
X Insulate the gas side and liquid side pipe referring to the thickness according to the pipe size.
X Indoor temperature of 30°C(86°F) and humidity of 85% is the standard condition. If install in a high humidity condition,
use one grade thicker insulator by referring to the table below. If installing in an unfavorable conditions,use thicker one.
X Insulator’s heat-resistance temperature should be more than 120°C(248°F).
Pipe
Outer diameter
Insulator (Cooling, Heating)
Remarks
General
[30°C (86°F)
, 85%
]
High humidity
[30°C (86°F)
, over 85%
]
EPDM, NBR
mm inch mm inch mm inch
Liquid
pipe
6.35~9.52 1/4~3/8 9 3/8 9 3/8
Heating resisting temperature
over 120°C (248°F)
12.70~50.80 1/2~2 13 1/2 13 1/2
Gas
Pipe
6.35
1/4
13 1/2 19 3/4
9.52~25.4
3/8~1
19 3/4 25 1
28.58~44.45 1 1/8~1 3/4 19 3/4 32 1 1/4
50.80 2 25 1 38 1 1/2
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