English
8
To keep the piping from becoming clogged with dirt,
•
avoid bends where possible and install so that traps can
be cleaned.
At least
4 in.
Air handler
At least
3 in.
Fig. 7
Observe the following guidelines when installing con-
•
centrated drain piping. Select the thickness of the
concentrated drain piping to refl ect the capacity of the
machine to which it will be connected. (Install a drain
trap for each indoor unit.) (
Refer to Fig. 8
)
At least 4 in.
Fig. 8
Concentrated drain piping
(Use a downward slope of at least 1/100.)
CAUTION
Water accumulating in the drain piping can cause the drain
•
to clog.
〈
PRECAUTIONS
〉
Drain piping connections
Do not connect the drain piping directly to sewage piping
•
that smell of ammonia. The ammonia in the sewage might
enter the indoor unit through the drain piping and corrode
the heat exchanger.
Do not twist or bend the drain hose, as excessive force may
•
cause it to leak.
After piping work is fi nished, check drainage fl ows
(2)
smoothly.
Gradually insert approximately 1 quart of water into the
•
drain pan to check drainage in the manner described
below.
INSTALLING THE DUCT
7.
Exercise care regarding the following when performing duct
work.
Verify that duct work does not exceed the unit’s setting range
•
of external static pressure (up to 0.5 Wg at “H” speed).
Install canvas ducts at air outlets and inlets so that vibrations
•
from the main unit are not transmitted to ducts or the fl oor.
Additionally, line the duct with sound-absorbing material
(heat insulation material) as necessary.
Be sure to install a optional air fi lter to the product’s air inlet
•
or to a fi eld-supplied air inlet inside the air passage on the
suction side.
Perform the curing and other work during duct welding so
•
that the inside of the product is not exposed to spatter.
If the metal duct passes through a metal lath, wire lath, or
•
metal plate of a wooden structure, isolate the duct from the
wall electrically.
Be sure to heat-insulate the duct to prevent the formation of
•
condensation. (Material: Glass wool or polyethylene foam;
thickness: 1 inch.)
Explain to the customer how to operate and clean fi eld-
•
supplied components such as air fi lters, air inlet grilles, air
outlet grilles.
To prevent drafts, locate the air outlet grille on the indoor
•
side so that warm air from the outlet does not come into
direct contact with room occupants.
When an electric heater (optional) is installed, use metal
•
duct and wrap the duct with a glass-wool insulation material.
ELECTRIC WIRING WORK
8.
GENERAL INSTRUCTIONS
8-1
Shut off the power before doing any work.
•
All fi eld supplied parts and materials, electric works must
•
conform to local codes.
Use copper wire only.
•
See also the “Wiring Diagram Label” located inside the unit’s
•
fan housing.
For details on hooking up the remote controller, refer to the
•
“REMOTE CONTROLLER INSTALLATION MANUAL”
All wiring must be performed by an authorized electrician.
•
This system consists of multiple indoor units. Mark each
•
indoor unit as unit A, unit B . . . , and be sure the terminal
board wiring to the outdoor unit and Branch Selector unit are
properly matched. If wiring and piping between the outdoor
unit and an indoor unit are mismatched, the system may
cause a malfunction.
Install a wiring interrupter or ground-fault circuit interrupter
•
for the power wiring.
Make sure the ground resistance is no greater than 100
•
Ω
.
To avoid short circuiting the power supply wire, be sure to
•
use insulated terminals.
Do not turn on the power supply (wiring interrupter or
•
ground-fault circuit interrupter) until all other work is done.
DANGER
Do not ground units to water piping, telephone wires or
•
lightning rods because incomplete grounding could cause a
severe shock hazard resulting in severe injury or death, nor
to gas piping because a gas leak could result in an explo-
sion which could lead to severe injury or death.
LIST OF STANDARD WIRING EQUIPMENT
8-2
Power supply wiring
(including ground wire)
Transmission wiring
Remote controller wiring
Field fuses
Size
Wire
Size
15A
Must comply
with local
codes.
2-conductor,
stranded, non-
shielded copper/
PVC or vinyl jacket
AWG18 – 16
Summary of Contents for FXTQ12PAVJU
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