Fujitsu AIRSTAGE J-IIIL Design & Technical Manual page 569

¢ Restriction when install
Be sure following restriction.
• Installation angle
Install the Header so that it branches horizontally.
Gas pipe
Horizontal
Liquid pipe
Horizontal
OK
Use a level to make sure that the Header is positioned as shown in following figure, and then sure
it in place.
Outdoor
unit side
A
Brazing point
Outdoor
B
unit side
Brazing
point
• Straight pipe length
A straight pipe (minimum length 2 ft [0.5 m]) before Header is necessary in order to separate the
refrigerant exactly.
Main pipe
To indoor unit
¢ Heat insulation installation
After brazing the piping, attach heat insulation.
1. Remove the protective paper for the tape on the heat insulation for the header and attach it.
Tighten by using binders at five locations.
2. Cover the plugging pipe with heat insulation and seal with tape.
Heat insulation
for plugging pipe
3-3. Header
Gas pipe
Horizontal
line
α1
H1
Liquid pipe
Horizontal
line
α2
H2
2 ft (0.5 m)
or more
To indoor unit
Plugging pipe
Prohibited
β1
Horizontal
line
View from A
Vertical line
β2
View from B
2 ft (0.5 m)
or more
Binder
Heat insulation
for header
Heat insulation
for plugging pipe
- (06-47) -
Prohibited
H1 = 0 to 3/8 in (0 to 10 mm)
α1: 0° to 1°
β1: -10° to +10°
H2 = 0 to 3/8 in (0 to 10 mm)
α2: 0° to 1°
β2: -10° to +10°
To indoor unit
Tape (Locally purchased)
3. Piping connection