Carrier PGD4 Owner's Information Manual

Also see for PGD4: Installation instructions Installation instructions Instruction manual

PGD4, PGS4, WPG4: Owner’s Information ManualManufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.7A07797Fig. 7 – To Shut-off Unit Electric CoolingMaintenance and Care for the Equipment OwnerBefore performing equipment maintenance yourself, please carefullyconsider the following:Air FiltersThe air filter(s) should be checked every 3 or 4 weeks and changed orcleaned whenever it becomes dirty. Dirty filters produce excessive stresson the blower motor and can cause the motor to overheat and shut down.This unit must have air filters in place before it can be operated. Thesefilters can be located in one of at least two places. In many applications,the installer will provide return air filter grilles mounted on the wall orceiling of the conditioned structure. In the instance of filter grilles, thefilters can simply be removed from the grille and replaced.The other typical application is an accessory filter rack installed insidethe unit itself. The following information is given to assist in changingfilters used in these internal filter racks.Filter kits are available as a purchased accessory. The same filter kit isincluded with the accessory economizers and factory installedeconomizers.To replace or inspect filters in accessory filter rack (See Fig. 2):1. Remove the filter access panel using a 5/16-in. nut driver.2. Remove the filter(s) by pulling it out of the unit. If the filter(s) isdirty, clean or replace with a new one.When installing the new filter(s), note the direction of the airflow arrowson the filter frame which should be pointing at the indoor coil.3. Reinstall filter access panel ensuring opening is air and water tight.If you have difficulty locating your air filter(s) or have questionsconcerning proper filter maintenance, contact your dealer forinstructions. When replacing filters, always use the same size and type offilter that was supplied originally by the installer. See Table 1 for filtersizes supplied with accessory filter rack.Replacing or inspecting filters in units witheconomizersSmall Chassis (See Fig. 8)1. Remove return air duct cover at rear of unit using a 5/16-in. nutdriver.2. Remove the filter(s) by pulling it out and through the unit ductopening. If filter is dirty, replace both filters with new ones.When installing the new filters, note the direction of the airflow arrowson the filter frame, which should be pointing at the indoor coil.3. Reinstall duct cover ensuring opening is air and watertight.Large Chassis (See Fig. 9)1. Remove filter access door using a 5/16-in. nut driver.2. Remove the filter(s) by pulling it out and through the unit filteraccess door. If filter is dirty, replace both filters with new ones.Units with bent indoor coils, install 24 x 18 x 1 (610 x 457 x 25 mm)filter first and then install 24 x 16 x 1 (610 x 406 x 25) filter.When installing the new filters, note the direction of the airflow arrowson the filter frame, which should be pointing at the indoor coil.3. Reinstall filter access door ensuring opening is air and water tight.90STEP 1 STEP 2CLOSESTEP 3OFFONMAINWARNING!FIRE, EXPLOSION ELECTRICAL SHOCK AND CUTHAZARDFailure to follow this warning could result in personal injury, death orproperty damage.1. Turn off gas supply first, then all electrical power to your unitand install lock-out tag before servicing or performingmaintenance.2. When removing access panels or performing maintenancefunctions inside your unit, be aware of sharp sheet metal partsand screws. Although special care is taken to reduce sharpedges to a minimum, be extremely careful when handling partsor reaching into the unit. Wear safety glasses, gloves andappropriate protective clothing.Table 1 – Replacement Filter SizesUnit Size Filter Size24-040/060 2 each 20 x 12 x 1(508 x 305 x 25 mm)30-040/060 2 each 20 x 12 x 1(508 x 305 x 25 mm)36-060/090 2 each 20 x 12 x 1(508 x 305 x 25 mm)42-060/090 1 each 24 x 14 x 1 (610 x 356 x 25 mm),24 x 16 x 1 (610 x 406 x 25 mm)48-090/115/130 1 each 24 x 14 x 1 (610 x 356 x 25 mm),24 x 16 x 1 (610 x 406 x 25 mm)60-090/115/130 **. Units with bent indoor coil.1 each 24 x 16 x 1 (610 x 406 x 25 mm),24 x 18 x 1 (610 x 457 x 25 mm)

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