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8.0 REGULAR MAINTENANCE ITEMS

8.1 Air Filters

Airltersshouldbecheckedonaregularbasisandchangedwhentheybecomedirty.Thiswillen-

sureefcientoperationoftheunit.Althoughtheunithasadirtylteralarm,thisshouldnotberelied

onastheonlydeterminantforreplacinglters.Amaladjustedlterdifferentialpressureswitchmay

notgiveaproperindicationofacloggedlter.

To check the pressure differential 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lters.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ltersshouldbekeptonstockasthesetendtobeafrequentlyreplacedmaintenanceitem.

Filters require changing as often as monthly. Note also that construction dust on new installations

willquicklyclognewlters.

WARNING:Airltersthatrequirechangingcanrestrictairowandcreateproblemssuch

as poor air distribution.

8.2 Humidier Canisters

SteamgeneratortypehumidierisstandardongForceGTseriesofequipment.Thereisnomain-

tenance 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humidierissentaspartofthe

paperwork placed inside the unit when it ships.

8.3 Fuses

Fuses may occasionally require changing especially with installations where the voltage is not con-

sistent. Drops in voltage can create brief periods of high amps draw, causing fuses to blow. Always

replace fuses with those of the equivalent rating with regard to: 1) amperage, 2) voltage, and 3)

speed. For instance motors are inductive loads which require time delay fuses. Electric reheat and

humidiersareresistiveloadsrequiringfastactingfuses.

8.4 Heating Elements

Heating elements do not normally require maintenance. However, sometimes they accumulate a

lmordirtwhenunusedforextendedperiodsoftime.Whenenergized,theburningdebriscancre-

ate smoke or an unpleasant odor. To help prevent this, periodic cleaning is recommended.

8.5 Refrigerant Filter Drier

Factoryinstalledrefrigerantlterdriersdonotrequiremaintenanceorreplacementunlessthesys-

tem has been opened. When replacing compressors or other repairs that open the refrigeration

systemtotheatmosphere,itisalwaysadvisabletoreplacethelterdrier.Theequivalenttypeand

size should be used.

Data Aire gForce GT series User Manual

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