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P00860Q-rev.2
5.5 Connecting Supply Duct
5.4 Adjusting of Unit Level
(1) Use a level to verify that the unit is perfectly horizontal. There should be no degree of slope present.
3/16 inch
(5mm)
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than the front side, to allow for proper drainage.
(3) Tighten the bolts of the nuts with the suspension brackets after adjustment is completed.
Adhesive must be applied to the bolts in order to prevent them from loosening.
NOTE:
During position the installation process, keep the unit well covered with vinyl cover and related
components covered until it is time to hoist into position.
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below in order to avoid abnormal sound vibration.
(4) Attach the vibration-proof rubber to suspension bolts in order to avoid abnormal sound vibration.
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Discharge Pressure Loss”. If the duct design is not appropriate, a bigger noise, splashed the water etc.
will occur. The damper or the duct fan etc. shall be used to adjust the fresh air volume to let the unit
external static pressure be more or less within pressure loss of duct.
(6) If pressure loss of duct is excessive, change the installation location of the unit or the shape of ducts in
order to let the design arrangement be within the unit external static pressure.
(7) Make sure that a service access panel is mounted on the ceiling for the service of electrical parts and
motor etc.. If the service access panel can not be mounted on the ceiling, an alternative opening shall
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installed and removed easily and for a fan, a heat exchanger and a drain pan to be installed through it.
(8) Install thermal insulations over the duct to prevent it from condensation.
(9) Do not install the duct in following places.
- Places where is subject to directly radiant heat from the sunlight or heat sources.
- Places where corrosive gases, volatile gases and explosive gases are generated.
- Places where air intake of such as a kitchen etc. is faced on.
In addition, install a protection hood and wrap the air inlet with seal materials (such as a net) to protect
the duct from any insects or small animals.
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wind blows (coast region, etc), consult with your distributor for countermeasures about the a periodic
maintenance and contract to replace a heat exchanger.
(11) If the outdoor temperature is low, “Defrosting Operation” is performed automatically and the air
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decreased when heating operation is started up. Therefore, make sure to choose the location with care
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