Daikin RDT Installation And Maintenance Manual

MaInTenanCe
www.DaikinApplied.com 129 IM 893-10 • ROOFPAK SINGLEZONE UNITS
Bearing Lubrication
CAUTION
Bearing overheating potential. Can damage the equipment.
Do not overlubricate bearings. Use only a high grade mineral
grease with a 200°F safe operating temperature. See below
for specic 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, relubricate the bearings while the
motor is warm, but not running. Use one of the greases shown
in Table 23.
1. Remove and clean upper and lower grease plugs.
2. Insert a grease tting into the upper hole and add clean
grease (Table 23) with a low pressure gun.
3. Run the motor for ve minutes before replacing the
plugs.
NOTE: Specic greasing instructions are located on a
tag attached to the motor. If special lubrication
instructions are on the motor, they supersede all other
instructions.
Condenser fan—Condenser fan motors are permanently
lubricated and require no periodic lubrication.
Table 23: Recommended Lubricants and Amounts for Fan
Motor Bearings
Mfr. Grease NEMA Size Amount to Add (oz.)
Texaco, Polystar or Polyrex
EM (Exxon Mobile) 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
CAUTION
For safety, stop rotating equipment. Add one half of the
recommended amoun hown in Table 22. Start bearing, and
run for a few minutes. Stop bearing and add the second half
of the recommended amount. A temperature rise, sometimes
30°F (1°C), after relubrication 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
relubrication schedule, see Table 20. For any applications that
are not in the ranges of the table, contact Daikin.
CAUTION
The following tables state general lubrication recommendations
based on our experience and are intended as suggested or
starting points only. For best results, specic applications
should be monitored regularly and lubrication intervals and
amounts adjusted accordingly.
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 relubrication.
Compatibility of grease is critical. Relubricatable Browning
bearings are supplied with grease ttings or zerks for ease of
lubrication with hand or automatic grease guns. Always wipe
the tting and grease nozzle clean.
Table 24: Relubrication Intervals*
Speed 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
*Use NLGI #2 Lithium or Lithium Complex Grease)

Daikin RDT Specifications

General

Brand	Daikin
Model	RDT
Category	Air Conditioner
Language	English