IM 782-12 • DESTINY AIR HANDLERS 46 www.DaikinApplied.com
Service and Maintenance
Service and Maintenance
Periodic Service and Maintenance
1. Check all moving parts for wear every six months.
2. Check bearing collar, sheave, and wheel hub setscrews,
sheave capscrews, and bearing hold-down bolts for
tightness every six months.
Ball Bearing Lubrication
1. Motor bearings—All ball bearings are prelubricated and do
not require additional grease during installation. However,
periodic cleaning out and renewal of grease is necessary.
Exercise extreme care when cleaning to prevent foreign
matter from entering the bearing. It is also important to
avoid over greasing. Only use a high grade, clean mineral
grease with the following characteristics.
a. Melting point preferably over 302°F (150°C).
b. Does not separate by oil and soap under operating
and storage conditions.
c. Free of abrasive matter, acid, alkali, and moisture.
d.
Specific greasing instructions are located on a
label attached to the fan section door.
2. Fan shaft bearings—All ball bearings are prelubricated
and do not require additional grease during installation.
Periodic greasing is necessary. Bearings are accessible in
the fan section. A grease fitting is located on each side of
the fan shaft. Do not over lubricate. Wipe off any excess
grease to prevent overheating. The lubrication interval
varies with the period of operation and temperature of the
ambient air. Use the guidelines in the
.
Table 35: Bearing Operating Temperature Range
Operation
To 130°F (54°C)
To 150°F (66°C)
Over 150°F
(66°C)
Continuous
operation
6 months
4 months
2 months
12-hr/day
operation
12 months
12 months
6 months
Table 36: Lubricants Recommended for Fan Shaft Ball
Bearings
Manufacturer
Product name
Temperature range,
°F (°C)
Texaco Lubricants
Company
Premium RB
-30 to 300 (-34 to 149)
Keystone Ind. Lubricants
81EP-2
0 to 250 (-18 to 121)
Mobil Oil Corporation
Mobilith SCH100
-40 to 350 (-40 to 177)
Exxon Company, U.S.A.
Ronex MP
-40 to 300 (-40 to 149)
Shell Oil Company
Alvania No. 2
-20 to 240 (-29 to 116)
NOTE:
Temperature ranges over 225°F are shown for lubricants only. High
temperature applications are not suitable for standard air handler components.
Figure 48: Fan Shaft Bearing Grease Fitting
Grease
(one each side
of fan shaft)
fitting
