Reznor MAPS III, Cabinet D RECB Users Manual - Manual (Page 6)

Form O-MAPSIII Cabinet D, P/N 222918R9, Page 6
3.0 Maintenance/
Service
Procedures
(cont'd)
3.2 Drive Components
Bearings - Bearings with a grease fitting should be lubricated twice a year with a high
temperature, moisture-resistant grease. (Type NLGI-1 or -2 standard grease is recom-
mended.) Be sure to clean the grease fitting before adding grease. Add grease with a
handgun until a slight bead of grease forms at the seal. Be careful not to unseat the
seal by over lubricating. NOTE: If unusual environmental conditions exist (tempera-
tures below 32°F or above 200°F; moisture; or contaminants), more frequent lubrica-
tion is required.
CAUTION: If the blower is unused for more than three months,
bearings with a grease fitting should be purged with new grease
prior to start-up.
Setscrews - Check all of the setscrews (bearing/blower hubs and pulleys). Torque pul-
ley setscrews a minimum of 110 in-lb to 130 in-lb maximum.
A bearing hub setscrew for a 1-3/8" to 1-3/4" shaft requires a 5/16" socket and a tight-
ening torque of 165 in-lbs.
Belts - Check belt for proper tension and wear. Adjust belt tension as needed. Replace
worn belts.
Blower systems are equipped with either Power Twist Plus
® linked blower belt or a solid
belt. The linked belts are designed in sections allowing for easy sizing and adjustment.
The belt is sized at the factory for the proper tension. If the belt needs adjustment, the
recommended method of shortening the belt length is to count the number of links and
remove one link for every 24. (A link is made up of two joining sections of belt. For eas-
ier removal of links, turn the belt inside out. But be sure to turn it back before installing.)
If equipped with a solid belt, adjust the belt tension by turning the adjusting screw on
the motor base until the belt can be depressed 1/2" (13mm) on each side. After correct
tension is achieved, re-tighten the locknut on the adjustment screw.
Proper belt tension is important to the long life of the belt and motor.
Be sure belts are aligned in the pulleys. If a belt is removed or replaced, be sure to align
directional arrows on the belt to the proper drive rotation.
Motor and Blower - Inspect the motor mounts periodically. Remove dust and dirt accu-
mulation from the motor and wheel.
The blower has cast iron, pillowblock, sealed bearings. Under most operating condi-
tions, re-lubrication is unnecessary. If lubrication is required, use a lubricant compat-
ible to Shell Alvania #2 (lithium base - Grade 2). Operating temperature range is -30
to 230°F.
"D" size cabinets have plenum fan blowers which have an extension to the grease fit-
ting on the side of the fan assembly.
If any drive parts need to be replaced, use only factory-authorized replacements
designed for the application.
3.3 Condenser Fans Depending on the size, there are two, three, or four fans in the condenser section. If
parts need to be replaced, use only factory authorized replacement parts.
See
FIGURE 3 for assembled dimensions and proper fan rotation direction.
2-1/2” (63.5mm) Fan and Motor Assembly
showing Fan Blade Position
Cross-section of Installed Fan and Motor
Assembly showing Cabinet Top
1.76” (44.7mm)
Top of Fan Blade
to Top of the
Cabinet Top Panel
Fan rotation
is clockwise
FIGURE 3 -
Condenser
Fan Assembly
Dimensions
and Rotation