Daikin FFQ09Q2VJU Manuel D'installation page 16

Refrigerant Piping Work
Cautions on piping handling
Protect the open end of the pipe from dust and moisture.
All pipe bends should be as gentle as possible. Use a pipe bender for
bending.
Insulation material: Polyethylene foam
Heat transfer rate: 0.041 to 0.052W/mK (0.024 to 0.030Btu/fth°F (0.035 to
0.045kcal/mh°C))
ACR Copper pipe only.
Be sure to insulate both the gas and liquid piping and observe the insulation dimensions as below.
O.D. 3/8 inch
Gas side
O.D. 1/2 inch
O.D. 1/4 inch
Liquid side
Use separate thermal insulation pipes for gas and liquid refrigerant pipes.
Make absolutely sure to execute thermal insulation works on the pipe-connecting section, after checking for gas leakage,
H
Piping insulation procedure
Gas piping
G Fitting insulation
(for gas pipe)
Gas
piping
D Clamps
(use 2 clamps per insulation)
Wrap over from the base of the unit
to the top of the are nut connection
K Medium 1 sealing pad for gas piping
CAUTION
condensation or burns if touched.
15
Minimum bend
Piping size
radius
1-3/16 inch (30mm)
(9.5mm) or more
1-9/16 inch (40mm)
(12.7mm) or more
1-3/16 inch (30mm)
(6.4mm) or more
Flare nut connection H Fitting insulation
(for liquid pipe)
Main unit
Liquid
piping
D Clamps
Attach to base
(use 2 clamps per insulation)
Wrap over from the base of the unit
to the top of the are nut connection
L
Piping thickness
0.031 inch (0.8mm)
(C1220T-O)
D clamps.
Liquid piping
Flare nut connection
Main unit
Attach to base
Medium 2 sealing pad for liquid piping
Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
insulation
insulation
Finishing tape
Drain hose
Thermal insulation Thermal insulation
size thickness
I.D. 15/32-19/32 inch
(12-15mm)
I.D. 9/16-5/8 inch 13/32 inch
(14-16mm) (10mm) Min.
I.D. 5/16-13/32 inch
(8-10mm)
G
Liquid pipe
Gas pipe
H Fitting insulation
(for liquid pipe)
G Fitting insulation
(for gas pipe)
D Clamps (use 2 clamps per insulation)
Wall
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