IM 915-13 • VISION - EXTENDED SIZES 42 www.DaikinApplied.com
Table 24: Re-lubrication Intervals
Speed
Bearing
Temperature
Relub. intervals
100 rpm
Up to 120°F
(50°C)
Clean 6 to 12 months
500 rpm
Up to 150°F
(65°C)
Clean 2 to 6 months
1000 rpm
Up to 210°F
(100°C)
Clean
2 weeks to 2
months
1500 rpm
Over 210°F
(100°C) to 250°F
(120°C)
Clean Weekly
Above 1500 rpm
Up to 150°F
(65°C)
Dirty/wet 1 week to 1 month
Max catalog rating
Over 150°F
(65°C) to 250°F
(120°C)
Dirty/wet Daily to 2 weeks
Above 250°F
(120°C)
Contact Browning
Table 25: Recommended Fan Re-lubrication Grease Charge
Shaft Size – in. (mm) Oz. (g)
1/2 to 3/4 (20) 0.03 (0.85)
7/8 to 1-3/16 (25-30) 0.10 (2.84)
1-1/4 to 1-1/2 (35-40) 0.15 (4.25)
1-11/16 to 1-15/16 (45-50) 0.20 (5.67)
2 to 2-7/16 (55-60) 0.30 (8.51)
2-1/2 to 2-15/16 (65-70) 0.50 (15.59)
3 to 3-7/16 (75-80) 0.85 (24.10)
3-1/2 to 4 (85-105) 1.50 (42.53)
Fan Drive Adjustments
Before servicing fan lock out and tag out all power to the unit.
Fans or belts can cause severe personal injury or death.
Do not open the hinged access door and screw-fastened
access panels while the unit is operating. Moving parts and
strong suction forces can severe personal injury or death.
Moving belt and fan can cause severe personal injury or death.
During installation and lter maintenance:
• Verify that the belt and fan guards on plenum fan units are
always in place.
• Lock and tag out fans to prevent accidental start up.
• Do not enter the lter compartment until the fan is completely
stopped.
• Use approved equipment for reaching lters located
above normal reach. Do not step on lter frames or unit
components.
• Floor surfaces must be dry and free of oil or grease.
Upon completion of the air balance, replace the variable
pitched motor sheave with a properly sized, xed sheave. A
matching xed sheave provides longer belt and bearing life
and minimizes vibration. Initially, it is best to have a variable
pitched motor sheave for the purpose of air balancing. Once
the balance is achieved, xed sheaves maintain balancing and
alignment more eectively. Replace the adjustable sheaves
with xed sheaves.
With the electrical power disconnected, locked and tagged
out, measure the diameter of the V-belt outer surface where
it passes around the sheave (pitch diameter). Calculate fan
speed from the motor nameplate rpm.
Measured diameter at motor sheave
Fan rpm = motor rpm ×
Measured diameter at fan sheave
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