Installing Heat Insulation; Installing Drain Pipes - Fujitsu Airstage ARXC072GTEH Installation Manual

Do not expose the unit (control box, rear panel, maintenance panel, etc.) and the inlet
grille to the fl ame. The exposure of these parts to the fl ame will adversely affect their
appearance and functions or cause a fi re.
If air or another type of refrigerant enters the refrigeration cycle, the internal pressure
in the refrigeration cycle will become abnormally high and prevent the unit from
exerting its full performance.
Apply nitrogen gas while
brazing the pipes. Nitrogen
gas pressure:
0.02 MPa (= pressure felt
sufficiently on the back of
your hand)
If a pipe is brazed without applying nitrogen gas, it will create an oxidation fi lm.
This can degrade performance or damage the parts in the unit (such as the
compressor or valves).
Do not use fl ux to braze pipes. If the fl ux is the chlorine type, it will cause the pipes to
corrode. Furthermore, if the fl ux contains fl uoride, it will adversely affect the refrigerant
pipe system such as by degrading the refrigerant oil.
For brazing material, use phosphor copper that does not require fl ux.

4.5. Installing heat insulation

• Install the coupler heat insulation after completing the refrigerant leak check (for details,
refer to the Installation Manual for the outdoor unit).
• There should be no gaps between the insulation and the product.
Cable tie (Large) (Accessories)
No gap
Cable tie (Large) (Accessories)
No gap

5. INSTALLING DRAIN PIPES

• Use general hard polyvinyl chloride pipe (VP25) and connect it with adhesive (polyvinyl
chloride) so that there is no leakage.
• The position of the installed drain pipe should have a downward gradient of 1/100 or
more.
• To prevent the pipe from freezing, use a heat insulation material as needed.
Position of drain piping
• ARXC072/ARXC090
200
Safety drain port Main drain port
Ø25.4 (O.D.) Ø38.1 (O.D.)
• ARXC096
200
Safety drain port
Ø25.4 (O.D.) Main drain port
Ø38.1 (O.D.)
CAUTION
Pressure regulating valve
Cap
Nitrogen gas
Brazing area
Coupler heat insulation (Small)
(Accessories)
Coupler heat insulation (Large)
(Accessories)
Unit : mm
40
Unit : mm
40
Drain pipe
• For main drain port
• For safety drain port
• This product has drain ports in 2 locations. Follow the procedure in the fi gure to connect
drain hose and drain pipes to each of them.
Install the drain hose to the main and safety drain port
Working procedure
(1) Install the attached drain hose to the main and safety drain port of the body. Install
the hose band from the top of the hose within the graphic display area. Secure fi rmly
with the hose band.
(2) Use vinyl adhesive agent to glue the drain piping (PVC pipe VP25) which is prepared
on site or piping socket. (Apply color adhesive agent evenly until the gauge line and
seal)
(3) Check the drainage.
(4) Install the heat insulation.
(5) Use the attached heat insulation to insulate the drain port and band parts of the body.
Drain hose
For main drain port
(Large)
Drain hose
For safety drain port
(Small)
Drain pan
10 to 15 mm
Applying
area of
Hard PVC side
adhesive
4 mm or less
Wrap the Drain hose insulation around the drain hose connection.
Drain pan
100mm
Hose opening view
Wind the attached heat insulation
around the hose band. Make sure
the alignment is on top.
After installing the Drain hose, check if the drainage is smooth.
GOOD
O.D.
32 mm (VP25)
Accessories
Hose band Drain hose
(Large) insulation
Hose band Drain hose
(Small) insulation
Ensure there is no space
Hose Band
(Accessories)
Soft PVC side
Drain hose
(Accessories)
Joint pipe
(locally purchased)
Drain pipe (VP25)
(locally purchased)
Drain hose insulation
(Accessories)
Drain hose
Downward gradient
2.5 to 5.0 mm
PROHIBITED
En-6