IM 777-8 • Skyline Air Handler 32 www.DaikinApplied.com
s
ervICe
and
M
aInTenanCe
s
ervICe
and
M
aInTenanCe
Periodic 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.
3. Annually check and snug all electrical connections.
Inspect for signs of water damage such as corrosion
and repair if necessary. Check ground conductor and
connection integrity. Service if needed.
Ball Bearing Lubrication
CAUTION
Bearing overheating potential. Can damage the equipment.
Do not over-lubricate bearings. Use only a high grade mineral
grease with a 200°F safe operating temperature. See below
for specific recommended lubricants.
Motor Bearings
Supply and return fans—Supply and return fan motors should
have grease added after every 2000 hours of operation. Using
the following procedure, re-lubricate the bearings while the
motor is warm, but not running. Use one of the greases shown
in
Table 24
.
NOTE:
Direct Drive Class II fans that are supplied with TECO
motors have double shielded bearings on frame sizes
140T-280T. These bearings are pre-packed with a long
life grease and are not re-greaseable. Larger frame
size TECO motors are re-greaseable and follow the
same lubrication recommendations as all other motors.
1. Remove and clean upper and lower grease plugs.
2.
Insert a grease fitting into the upper hole and add clean
grease (
Table 24
) with a low pressure gun.
3.
Run the motor for five minutes before replacing the plugs.
NOTE:
Specific greasing instructions are located on a tag
attached to the motor. If special lubrication instructions
are on the motor, they supersede all other instructions.
Table 24: Recommended Lubricants and Amounts for Fan
Motor Bearings
Mfr . Grease
NEMA Size
Amount to Add
(oz .)
Texaco, Polystar
or
Polyrex EM (Exxon Mobil)
or
Rykon Premium #2
or
Penzoil Pen 2 Lube
56 to 140
0.08
140
0.15
180
0.19
210
0.30
250
0.47
280
0.61
320
0.76
360
0.81
400
1.25
440
2.12
Fan Shaft Bearings
Any good quality lithium or lithium complex base grease, using
mineral oil, conforming to NLGI grade 2 consistency, and an oil
viscosity of 455-1135 SUS at 100°F (100-200 cSt at 40°C) may
be used for re-lubrication.
Compatibility of grease is critical. Re-lubricatable bearings are
supplied with grease fittings or zerks for ease of lubrication with
hand or automatic grease guns. Always wipe the fitting and
grease nozzle clean.
CAUTION
For safety, stop rotating equipment. Add one half of the
recommended amount shown in
Table 24
. Start bearing, and
run for a few minute Stop bearing and add the second half
of the recommended amount. A temperature rise, sometimes
30°F (1°C), after re-lubrication is normal. Bearing should
operate at temperature less than 200°F (94°C) and should
not exceed 225°F (107°C) for intermittent operation. For a re-
lubrication schedule, see
Table 25
. For applications that are
not in the range of the table, contact Daikin.
CAUTION
The tables below state general lubrication recommendations
based on our experience and are intended as suggested or
starting points only. For best results, specific applications
should be monitored regularly and lubrication intervals and
amounts adjusted accordingly.
Table 25: Re-lubrication Intervals
(Use NLGI #2 Lithium or Lithium Complex Grease)
Speed
Bearing
Temperature
Cleanliness
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
