Specifications

862
FDC-HKX
(b) Specification of insulator
Item Standard specification Specification as per JIS A9501
Spec Gas piping Liquid piping Gas piping Liquid piping
Thickness 10 mm 10 mm 25 mm 15 mm
Meterial PVC + NBR closed cell
Foamed polyethylene cylinder or Glass wool
insulation pipe
Outdoor Galvanized sheet + painting
In-
door
Piping route Insulator Finishing
Concealed Section
Exposed Section
Insulator + iron wire + waterproof Flame retardant base pater + Flame
paper + iron wire retardant cotton tape + filler + painting
PVC: Poly vinyl chloride, NBR. Nitrile butadiene rubber
(c) Finising work
1) When using an insulation of standard specification, cover indoor
exposed section with vinyl chloride tape, and finish outdoor ex-
posed section with colored galvanized sheet or aluminum sheet.
No finishing is required for indoor concealed section.
2) When using glass wool insulation cylinder, finish it as shown
here in general.
3) Insulate the flared connection of indoor unit with insulator (pipe cover).
(Insulate both the gas pipe and the liquid pipe.)
(5) Air-tight test
(a) When conducting an air-tight test of local piping, connect the piping to the check joint of the evacuating pipe connected to the
gas side service valve, and keep the service valve closed. The air-tight test pressure shall be 3.0MPa [R407C : 3.3MPa]
(b) To conduct the test, pressurize the check joint of evacuating pipe by nitrogen gas as shown below. The local piping including
indoor units can be tested as for airtightness.
Gas side service valve
Check joint
Band (Accessory)
Pipe cover
(Accessory)
Pipe
Insulator
Water proof paper
Fixing
iron wire
Flame retardant
base paper
Flame retardant
cotton tape
Press-
urizing
Indoor unit
Indoor unit
Outdoor unit