Specifications

JOHNSON CONTROLS
16
FORM ET102.19-NOM1 (809)
Fan Bearings
Bearing Set Screw Alignment
Align bearing setscrews. See Table 1 for bearing
setscrew torque.
Fan Bearings should be lubricated with a lithium
base grease which conforms to NLGI Number 2 for
consistency. See Tables 2, 3 and 4 for recommended
greasing intervals, operating range, and bearing grease
capacities.
TABLE 2 - RECOMMENDED GREASING INTER-
VALS OF FAN BEARINGS
Operating Conditions
-20°F to
+140°F
140°F to
200°F
Clean, Dry 3-6 months 1-3 weeks
Dirty, Dry 1-3 months 1-4 weeks
Dirty, Wet, High Humid 1-4 weeks 1-14 days
TABLE 3 - RECOMMENDED GREASES FOR
VARIOUS OPERATING RANGES
Recommended Greases
Recommended Operating
Range
Texaco-Multi Fak #2 -20°F to +250°F
Shell Alvania #2 -20°F to +250°F
Mobil Mobilux #2 -20°F to +250°F
Exxon Unirex #2 -20°F to +250°F
Exxon Beacon -65°F to +250°F
TABLE 4 - FAN BEARING MAXIMUM GREASE
CAPACITY
Shaft Size in inches Capacity in . Oz.
1/2 – 3/4 1/8
7/8 – 1-3/16 3/8
1-1/4 – 1-1/2 5/8
1-11/16 – 1-15/16 7/8
2 – 2-7/16 1-1/4
2-1/2 – 2-15/16 2
To lubricate the fan bearing, complete the following:
1. Disconnect all electrical power to the unit, tag and
lock out power source.
2. Check grease lines for tight connections at the
grease tting.
3. Using a manual low-pressure grease gun, add
grease until a light bead appears at the bearing
grease seal. Turn the fan wheel manually while
adding grease.
Motor
General Inspection
Inspect the motor at regular intervals, approximately
every 500 hours of operation or every three months,
which ever occurs rst. Operating conditions will vary
the frequency of inspection and lubrication. Table 5 lists
recommended motor greasing intervals. Keep the motor
clean and the ventilation opening clear. The following
steps should be performed at each inspection:
1. Check that the motor is clean. Check that the in-
terior and exterior of the motor is free of dirt, oil,
grease, water, etc. This can accumulate and block
motor ventilation. If the motor is not properly
ventilated over heating can occur and can cause
early motor failure.
2. Use “Megger” periodically to ensure that the
integrity of the winding insulation has been main-
tained. Record the “Megger” readings. Immedi-
ately investigate any signicant drop in insulation
resistance.
3. Check all electrical connectors to be sure that they
are tight.
4. Check that all mechanical fasteners are properly
tightened.
TABLE 5 - RECOMMENDED MOTOR GREASING SCHEDULE
Average Daily
Operating Hours
Ambient Temp. Maximum Average Environment
.25 to 7.5 HP
Motors
10 HP Motors
8-16 40°C Clean and Dry Every 5 years Every 3 years
12-24 50°C Moderate Dirt or Moisture Every 2 years Every year
Any >50°C or Class H Insulation
Severe
(very dirty or high temperatures)
Every 6 months Every 3 months