Installing Thermal Insulation; Installing Drain Pipes; When Drain Pump Is Used; When Drain Pump Is Not Used (Natural Drainage) - Fujitsu ARXD004HLAH Installation Manual

4.4. Installing thermal insulation

Install the thermal thermal insulation after performing a refrigerant leak check (refer to the
installation manual for the outdoor unit for details).
4.4.1. Coupler thermal insulation
• Insulate by the coupler thermal insula-
tion (accessories) around the gas pipe
and liquid pipe of indoor side.
• After installing the coupler thermal
insulation, wrap both end with vinyl tape
so that there is no gap.
• After affixing the coupler thermal insula-
tion, secure it with 2 cable ties (large),
one on each end of the insulation.
• Make sure that the cable ties overlap
the thermal insulation.
After checking for gas leaks (refer to the installation manual of the outdoor unit), perform
this section.
Install thermal insulation around both the large (gas) and small (liquid) pipes. Failure to
do so may cause water leaks.

5. INSTALLING DRAIN PIPES

Do not insert the drain piping into the sewer where sulfurous gas occurs. (Heat ex-
change erosion may occur.)
Insulate the parts properly so that water will not drip from the connection parts.
Check for proper drainage after the construction by using the visible portion of transpar-
ent drain port and the drain piping final outlet on the body.
Do not apply adhesive agent on the drain port of the body.
(Use the attached drain hose and connect the drain piping.)

5.1. When drain pump is used

• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm].
• Do not perform a rise, trap and air bleeding.
• Provide a downward gradient (1/100 or more).
• Provide supporters when long pipes are installed.
• Use an thermal insulation as needed, to prevent the pipes from freezing.
• Install the pipes in a way that allows for the removal of the control box.
GOOD
Locally arranged pipe
Max. 300 mm
PROHIBITED
Observe the following procedures to construct centralized drain pipe fittings.
VP30 or more [O.D 38 mm or more]
700 mm or less
Coupler thermal
insulation
Cover this portion with
(accessories)
thermal insulation.
cable tie (large) Thermal insulation
(accessories)
CAUTION
WARNING
CAUTION
Gap of 1.5 to 2 m
Supporter
VP25 [O.D
32 mm or more]
700 mm or
less
Horizontal or
upward gradient
Air bleeding Rise
Trap
Downward gradient 1/100 or more

5.2. When drain pump is not used (Natural drainage)

If the drain pump is not used, replace with
the drain cap.
• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm].
• Do not perform a rise, trap and air bleeding.
• Provide a downward gradient (1/100 or more).
• Provide supporters when long pipes are installed.
• Use an thermal insulation as needed, to prevent the pipes from freezing.
• Install the pipes in a way that allows for the removal of the control box.
GOOD
100 mm or more
Locally arranged pipe
PROHIBITED
Observe the following procedures to construct centralized drain pipe fittings.
VP30 or more
[O.D 38 mm or more]
Gap of 1.5 to 2 m
Downward gradient
2.5 to 5.0 mm
Supporter
VP25 [O.D 32 mm
or more]
Trap
Rise
Air bleeding
Downward gradient
1/100 or more
En-8