Daikin Air Handling Unit OAH035GHAM

WARNING: Moving belt and fan can cause severe personal injury or death. Always ensure safety measures are in place.

During installation and filter maintenance, verify that the belt and fan guards on plenum fan units are always in place.

Lock and tag out fans to prevent accidental start up.

Do not enter the filter compartment until the fan is completely stopped.

Use approved equipment for reaching filters located above normal reach.

Do not step on filter frames or unit components.

Floor surfaces must be dry and free of oil or grease.

The ideal tension is the lowest tension at which the belt does not slip under peak load conditions.

WARNING: Rotating fan can cause severe injury or death. Before servicing fans, lock out and tag out power

WARNING: Fire/electric shock hazard can cause property damage, personal injury or death. Wire fan power supply and ground motor frame in accordance with local electric codes

WARNING: Fan motor requires overload protection. Failure to provide motor overload protection can result in fire, property damage, electric shock, personal injury, or death. Connect motor to an overload protective device rated in compliance with local electric codes

CAUTION: Do not overheat fan motor. High air temperatures in the fan section can cause the fan motor to burn out. On draw-through air handlers or air handlers with the fan section down the air stream from the heating section, the discharge air temperature of the heating section must not exceed 104°F (40°C)

WARNING: Maximum operating altitude should not exceed 15,000 feet. When performing startup and service, always take thorough safety precautions. Only trained, experienced personnel should perform these functions

CAUTION: Equipment damage due to loose fasteners represents improper start-up and equipment abuse. It is not covered by the warranty. Before entering fan section, make sure that fan electrical power source is disconnected and locked in the OFF position

Check that the unit is completely and properly installed with ductwork connected

Check that construction debris is removed and filters are clean

Check that all electrical work is complete and properly terminated

Removing and Replacing Components

Before removing component, lock out and tag out all power to the unit

Fans and belts can cause severe personal injury or death

See page 12 for instructions on removing panels and opening fan access doors to remove or replace components

The fan shaft, motor, and any drive components can be removed and replaced through the access door opening

If required, the side panel can be removed for additional access

If fan replacement is required, the entire fan assembly can be pulled out the side of the cabinet for housed fan assemblies

CAUTION: Bearing overheating potential. Can damage the equipment. Do not over-lubricate bearings. Use only a high grade mineral grease with a 200°F safe operating temperature.

Fan Shaft Bearings CAUTION: For safety, stop rotating equipment.

Did you add one half of the recommended amount shown in Table 43?

Did you start bearing, and run for a few minutes?

Did you stop bearing and add the second half of the recommended amount?

Enter the temperature rise after re-lubrication

Is bearing operating at temperature less than 200°F (94°C)?

Is bearing not exceeding 225°F (107°C) for intermittent operation?

For a re-lubrication schedule, see Table 44. For applications that are not in the range of the table, contact Daikin Applied.

All electrical connections checked and snug

Signs of water damage such as corrosion inspected

Ground conductor and connection integrity checked

Sign off on the electrical system check