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3. INSTALLATION
3.1 Installation Preparation
WARNING
Keep all the accessories and tools until installation work is
completed.
● Leave the unit inside its packaging while moving, until reaching
the installation site. Where unpacking is unavoidable, use a sling
of soft material or protective plates together with a rope when
lifting, to avoid damage or scratches to the unit.
● Hold the unit by the hanger brackets when opening the crate and
moving it, and do not lift it holding on to any other part (especially
the duct connecting flange).
NOTE
Be sure to instruct customers how to properly operate the unit
(especially maintenance of air filter, and operation procedure) by
having them carry out operations themselves while looking at the
manual.
3.2 Select The Installation Site
CAUTION
When moving the unit during or after unpacking, make sure to lift
it by holding its hanger brackets. Do not exert any pressure on
other parts, especially duct connecting flange.
● Select an installation site where the following conditions are
fulfilled and meet with your customer’s approval.
● KRE should be installed far away from office, recreation or any
other places where silent environment are required. (install that
in special machine room or wash room is recommended)
● install in a place which has sufficient strength and stability.
(Beam, ceiling and other locations capable of fully supporting
the weight of the unit.) Insufficient strength is dangerous. It may
also cause vibration and unusual operating noise.
● Do not install the unit directly against a ceiling or wall. (If the
unit is in contact with the ceiling or wall, it can cause vibration.)
● Where sufficient clearance for maintenance and service can be
ensured.
CAUTION
● Install the units, power supply wiring and connecting wires at
least 1 meter away from televisions or radios in order to pre-
vent interference or noise. (Depending on the radio waves, a
distance of 1 meter may not be sufficient enough to eliminate
the electric interference.)
● The bellows may not be able to be used in some districts, so
exercise caution. contact your local government office or fire
department for details.
● When discharging exhaust air to a common duct, the Building
Standard Law requires the use of fire proof materials, so
attach a 2m copper plate standing duct.
● Do not install the unit in the following locations:
● Place subjected to high temperature or direct flame. May result in
fire or overheating.
● Place such as machinery plant and chemical plate where gas,
which contains noxious gas or corrosive components of materials
such as acid, alkali organic solvent and plaint, is generated.
Place where combus tible gas leakage is likely.
Copper piping and brazed joins may corrode, causing refrigerant
to leak or poisoning and fore due to leaked gas.
● Place such as bathroom subjected to moisture.
Electric leak or electric shocks and other failure can be caused.
● Near machinery emitting electromagnetic waves.
Electromagnetic waves may disturb the operation of the control
system and result in a malfunction of the equipment.
3.3 Preparations Before Installation
● Confirm the positional relationship between the unit and suspen-
sion bolts.
Leave space for servicing the unit and include inspection hatch-
es. (Always open a hole on the side of the electric parts box so
that the air filters, heat exchange elements, fans, be easily be
inspected and serviced.)
● Make sure the range of the unit’s external static pressure is not
exceeded.
● Open the installation hole (Pre-setting ceilings)
Once the installation hole is opened in the ceiling where the unit
is to be installed, pass transmission wiring, and remote controller
wiring to the unit’s wiring holes.
After opening the ceiling hole, make sure ceiling is level if need-
ed. It might be necessary to reinforce the ceiling frame to prevent
shaking.
Please consult architect or woodworker, if necessary.
● Install the suspension bolts. (Use M10 to M12 suspension bolts.)
Use a hole-in anchor, sunken insert anchor for existing ceilings,
or other parts to be procures in the field to reinforce the ceiling to
bearing the weight of the unit.
● Install vibration damping feet. (For vibration damping)
Wooden structure
Put rectangular sticks across the beams, and set pendant bolts.
Wooden span
Beam
Ceiling
Pendant bolt(M10 to M12)
Old concrete roughcast
Use embedded bolts and embedded pulling plugs.
Fig. 3-1
