Johnson Controls (H,Y,C)IDM012B21S Installation And Maintenance Manual page 19

(6) Wherever buried piping exists on site, make sure there is a service doorway to provide adequate access
to inspect piping sockets and elbows, and for interconnecting parts.
(7) Piping must be reinforced to withstand earthquakes so as not to be damaged by an external force.
(8) Do not tightly secure refrigerant piping to accommodate expansion and contraction.
(9) Prevent the pipes from contacting weak portions such as wall, ceiling, etc. (Otherwise, abnormal sound
may be heard due to vibration of the piping.)
(10) Test for air-tight integrity. The air-tight procedures should be performed in accordance with the
"Installation and Maintenance Manual" for the outdoor unit.
(11) If temperature and humidity inside the ceiling exceed 80.6°F (27°C)/RH80%, condensation occurs
on the surface of the accessory insulation. Wrap additional insulation (approximately 3/16~3/8 inch
(5~10mm) thickness) around the accessory insulation of the refrigerant pipe as a preventive measure.
(12) Insulate each flare connection without gap with accessory insulations to prevent condensation. Then
insulate each refrigerant pipe as well.
P00792Q-rev.2
Securely fasten cable clamps and the vinyl tape
in order to prevent the accumulation of moisture.
Fasten with cable clamps
at 3 locations along the pipe
(Accessory).
Unit
Side
Insulation Material
(Factory-Supplied)
Check for any clearance between
the indoor unit and the insulation.
Fix the vinyl tape position at the vertical part
(Insulation for Refrigerant Pipe (Accessory)).
Refrigerant Pipe
(Field-Supplied)
Insulation for
Refrigerant Pipe
(Field-Supplied)
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