Data Aire DAMA-01 Installation, Operation And Maintenance Manual

Also see for DAMA-01: Installation, operation & maintenance manual

Data Aire DAMA-01 Installation, Operation And Maintenance Manual Manual pdf 32 page image

328.0 REGULAR MAINTENANCE ITEMS8.1 Air FiltersAir filters should be checked on a regular basis and changed when they become dirty. This willensure efficient operation of the unit. Spare air filters should be kept in stock as these tend to be afrequently replaced maintenance item. Air filters may require changing as often as monthly depen-dent on room or space conditions. New installations with construction dust will quickly clog filtersrequiring new filters.The optional Mini DAP-II or optional Mini DAP-III control panels monitor air filters. A dirty filter alarmwill be enunciated on the controls display screen. Although the unit may display a dirty filter alarm,this should not be relied on as the only determinant for replacing air filters. A misadjusted air filterdifferential pressure switch may not give a proper indication of a clogged filter.To check the air filter pressure differential pressure switch for proper adjustment, temporarily coverapproximately 75% of the return air opening using heavy cardboard or similar material. The alarmshould energize when 75% of the air is blocked, simulating dirty filters. If the alarm energizes pre-maturely or does not energize at all, the pressure switch should be adjusted. Panels must remainclosed when determining if an adjustment is necessary.WARNING: Air filters that require changing can restrict airflow and create problems suchas coil icing or poor air distribution.8.2 BeltsBelt tension should be checked on a regular basis (monthly) to ensure proper tension. If tighten-ing is required, loosen the four mounting bolts. Turn the adjustment screw on the end of the mo-tor mounting channel until the proper belt tension is attained. Retighten the four mounting bolts.Damage can occur from belts that over tightened. The amount of play in a typical drive set shouldbe 1/2 inch. When tightening the belts make sure the pulley alignment is true. If the belts are overtightened or if the pulleys are misaligned, the bearing life and belt life are shortened considerably.8.3 BearingsBlower bearings used with Mini ceiling units are permanently lubricated and do not require mainte-nance.Some motors have Zirk type grease fittings on the bearings. If so, the motor should be greased atleast annually. Use NLG1 grade 2 lithium or lithium complex grease. Care should be taken to avoidover-greasing the bearings. Only one or two pumps from a manual gun are required.