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5.0 REGULAR MAINTENANCE ITEMS
5.1 Filters
Filters should be checked on a regular basis and changed when they become dirty. This will ensure
efficient operation of the unit. Although the unit has a dirty filter alarm, this should not be relied on as the
only determinant for replacing filters. A maladjusted filter differential pressure switch may not give a
proper indication of a clogged filter.
To check the filter differential pressure switch for proper adjustment, temporarily cover about 75% of
the return air opening using heavy cardboard or similar material. The alarm should energize when 75%
of the air is blocked, simulating dirty filters. If the alarm energizes prematurely or does not energize at
all, the pressure switch should be adjusted. Doors must remain closed when determining if an adjustment
is necessary.
Spare filters should be kept in stock as these tend to be a frequently replaced maintenance item.
Filters may require changing as often as monthly. Note also that construction dust on new installations
will quickly clog new filters.
Filters that require changing can restrict airflow and create problems such as poor air
distribution.
5.2 Belts
Belt tension should be checked regularly (monthly) to ensure proper tension. If tightening is required,
loosen the four motor mounting bolts. Turn the adjustment screw on the end of the motor mounting
channel until the proper belt tension is attained. Retighten the four mounting bolts. Damage can also
occur to belts that are overtightened. The amount of play in a typical drive set should be 1/2 inch.
5.3 Bearings
Pillow block bearings used on many models have zirk type grease fittings. These will only require
grease once annually. Care should be taken to avoid over-greasing. Only one or two pumps from a
manual gun are required. All other blower bearings are permanently lubricated and do not require
maintenance.
Most blower motors have sealed bearings and are maintenance free. Some motors have zirk type
grease fittings on the bearings. If so the motor should be greased once annually. Care should be taken
to avoid over-greasing. Only one or two pumps from a manual gun are required.
5.4 Humidifier Canisters
Steam generator type humidifier is standard on Data Aire Series equipment. There is no maintenance
required other than to replace the canister as required. This frequency will depend on usage and water
type. A set of manufacturer’s instructions for the humidifier is sent as part of the paperwork placed
inside the unit when it ships.
5.5 Fuses
Fuses may occasionally require changing especially with installations where the voltage is not
consistent. Drops in voltage can create brief periods of high amp draw, causing fuses to blow. Always
replace fuses with those of the equivalent rating with regard to: 1) amperage, 2) voltage, and 3) speed.
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