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Table 34: Recommended Fan Re-lubrication Grease
Charge
Shaft Size – in . (mm)
1/2 to 3/4 (20)
7/8 to 1-3/16 (25-30)
1-1/4 to 1-1/2 (35-40)
1-11/16 to 1-15/16 (45-50)
2 to 2-7/16 (55-60)
2-1/2 to 2-15/16 (65-70)
3 to 3-7/16 (75-80)
3-1/2 to 4 (85-105)
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Fan Drive
Oz (g)
Before servicing lock out and tag out all power to the
0.03 (0.85)
unit . Fans or belts cause severe personal injury or death.
0.10 (2.84)
0.15 (4.25)
0.20 (5.67)
0.30 (8.51)
Do not open the hinged access door and screw-fastened
0.5 (15.59)
access panels while the unit is operating . Moving parts
0.85 (24.10)
and strong suction forces can cause severe personal injury
1.5 (42.53)
or death.
Upon completion of the air balance, replace the variable
pitched motor sheave with a properly sized, fixed sheave. A
matching fixed 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, fixed sheaves maintain balancing and
alignment more effectively. Replace the adjustable sheaves
with fixed 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.
Fan rpm = motor rpm ×
63
s
ervICe and
WARNING
WARNING
Measured diameter at motor sheave
Measured diameter at fan sheave
IM 777-18 • SKYLINE OUTDOOR AIR HANDLER
M
aInTenanCe
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