Daikin R410A Split Series - Pipe Neatening and Drain Hose Notes

17 ■English
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.
Wall
If no flare cap is
available, cover the
flare mouth with
tape to keep dirt
and water out.
Rain
Be sure to
place a cap.
Selection of copper and heat insulation materials
When using commercial copper pipes and ttings, observe the following:
• 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))
Be sure to use insulation that is designed for use with HVAC Systems.
• ACR Copper pipe only.
Gas pipe
Liquid pipe
Gas pipe
insulation
Liquid pipe
insulation
Finishing tape
Drain hose
• Be sure to insulate both the gas and liquid piping and observe the insulation dimensions as below.
Gas side
Piping size
O.D. 3/8 inch
(9.5mm)
O.D. 1/2 inch
(12.7mm)
O.D. 5/8 inch
(15.9mm)
O.D. 1/4 inch
(6.4mm)
1-3/16 inch (30mm)
or more
1-9/16 inch (40mm)
or more
1-15/16 inch (50mm)
or more
1-3/16 inch (30mm)
or more
0.031 inch (0.8mm)
(C1220T-O)
0.039 inch (1.0mm)
(C1220T-O)
0.031 inch (0.8mm)
(C1220T-O)
I.D. 15/32-19/32 inch
(12-15mm)
I.D. 9/16-5/8 inch
(14-16mm)
I.D. 5/8-13/16 inch
(16-20mm)
I.D. 5/16-13/32 inch
(8-10mm)
13/32 inch
(10mm) Min.
Minimum bend radius Piping thickness Thermal insulation size
Thermal insulation
thickness
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,
by thoroughly studying the following gures and using the included thermal insulating materials
D
tting insulation and
E
tting insulation. Fasten both ends with the
H
clamps.
• Make sure to bring the seam of
D
tting insulation and
E
tting insulation to the top.
Piping insulation procedure
Gas piping Liquid piping
Clamps
(use 2 clamps per insulation)
H
Sealing pad (medium)G Sealing pad (medium)G
Fitting insulation
(for liquid pipe)
DFitting insulation
(for gas pipe)
E
Gas
piping
Main unit
Attach to base
Flare nut connection
Clamps
(use 2 clamps per insulation)
H
Liquid
piping
Main unit
Attach to base
Flare nut connection
Wrap over from the base of the unit
to the top of the flare nut connection
Wrap over from the base of the unit
to the top of the flare nut connection
Clamps
(use 2 clamps
per insulation)
H
Clamps (use 2 clamps
per insulation)
H
Fitting insulation
(for gas pipe)
E
Fitting insulation
(for liquid pipe)
D
Gas piping
Liquid piping
CAUTION
Be sure to insulate any eld piping all the way to the piping connection inside the unit. Any exposed piping may cause
condensation or burns if touched.
01_EN_3P674701-1B.indd 17 2022/06/02 10:06:28