ClimateCraft DHII-007, Installation, Operation And Maintenance Manual, Page: 23 / 36

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Air Handling Unit
Installation, Operation, and Maintenance Manual
April 2021
Table 12-4. Service Conditions
Severity of Service
Hours per
day of
Operation
Ambient
Temperature
Maximum
Atmospheric Contamination
Service
Interval
Multiplier
Standard 8 104°F (40°C) Clean, little corrosion 1.0
Severe 16+ 122°F (50°C) Moderate dirt, corrosion 0.5
Extreme 16+
122°F (50°C)* or
Class H Insulation
Severe dirt, abrasive dust,
corrosion, heavy shock,
vibration
0.1
Low Temperature <-20°F (<-29°C)** 1.0
*Special high temperature grease recommended (Dow Corning DC44). Dow Corning DC44 is NOT COMPATIBLE with other
grease types. Thoroughly purge and clean bearing and cavity before using.
**Special low temperature grease recommended (Aeroshell 7).
Table 12-5. Bearing Sizes and Types
NEMA Frame Size
Bearing Description
[Large bearings (Shaft End) in each frame size]
Bearing
Weight of Grease
to Add in oz (gm)
Volume of Grease to Add
in
3
Teaspoons
56 to 140 6203 0.08 (2.4) 0.15 0.5
140 6205 0.15 (3.9) 0.20 0.8
180 6206 0.19 (5.0) 0.30 1.0
210 6307 0.30 (8.4) 0.60 2.0
250 6309 0.47 (12.5) 0.70 2.5
280 6311 0.61 (17.0) 1.20 3.9
320 6312 0.76 (20.1) 1.20 4.0
360 6313 0.81 (23.0) 1.50 5.2
400 6316 1.25 (33.0) 2.00 6.6
440 6319 2.12 (60.0) 4.10 13.4
5000 to 5800 6328 4.70 (130) 9.20 30.0
5000 to 5800 NU328 4.70 (130) 9.20 30.0
360 to 449 NU319 2.12 (60.0) 4.10 13.4
NOTE: Not all bearing sizes are listed. For intermediate bearing sizes, use the grease volume for the next
larger size bearing.
Relubrication Procedure:
1. Verify grease being added is compatible with the grease already in the motor.
2. Remove grease outlet plug.
3. With motor stopped, clean all grease fittings with clean cloth.
4. Add recommended amount of grease (Table 12-5).
5. Operate motor for 15 minutes with grease plug removed. This allows excess grease to purge.
6. Reinstall grease outlet plug.
Over-Lubrication can cause excessive bearing temperatures,
premature lubrication breakdown and bearing failure. Do Not
over-lubricate motor.
⚠
CAUTION