Daikin RoofPak RPS Series Installation And Maintenance Manual page 109

Restart
After extended storage, perform a complete start up. Inevitable
accumulations of dirt, insect nests, etc. can contribute to
problems if not cleaned out thoroughly prior to start up. In
addition, thermal cycling tends to loosen mechanical and
electrical connections. Following the startup procedure helps
discover these and other issues that may have developed
during the storage interval.
Gas Furnace
For information on maintenance of the gas furnace, refer to
684 or IM 685.
Bearing Lubrication
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. Refer to
recommended lubricants.
Motor Bearings
Supply and return fans—Supply and return fan motors should
have grease added after every 2000 hours of operation. Use
one of the greases shown in
Using the following procedure, relubricate the bearings while
the motor is warm, but not running.
1. Remove and clean upper and lower grease plugs.
2. Insert a grease fitting into the upper hole and add a small
amount of clean grease
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.
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
Texaco, Polystar
or
Polyrex EM (Exxon
Mobile)
or
Rykon Premium #2
or
Penzoil Pen 2 Lube
www.DaikinApplied.com
CAUTION
Table 24 for specific
Table 23.
(Table 23) with a low pressure gun.
Amount to Add (oz .)
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
For safety, stop rotating equipment and lockout/tagout the
disconnects. Add one half of the recommended amount
shown in Table 25. 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)
IM
for intermittent operation. For a relubrication schedule, see
Table 24. For any applications that are not in the ranges of the
table, contact Daikin.
The tables in this manual -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.
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. Relubable Browning 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.
Table 24: Relubrication Intervals
Speed Temperature
Up to 120°F
100 rpm
Up to 150°F
500 rpm
Up to 210°F
1000 rpm
1500 rpm
250°F (120°C)
Up to 150°F
Above 1500 rpm
Over 150°F (65°C)
Max catalog rating
250°F (120°C)
Above 250°F
Use NLGI #2 Lithium or Lithium Complex Grease
Table 25: Recommended Fan Relubrication Grease Charge
Shaft Size
[inches (mm)]
1/2 to 3/4 (13-20)
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)
109
Maintenance and Service
CAUTION
CAUTION
Cleanliness
Clean
(50°C)
Clean
(65°C)
Clean
(100°C)
Over 210°F
(100°C) to Clean
Dirty/wet
(65°C)
to Dirty/wet
Contact Browning
(120°C)
Weight
[Ounces (grams)]
0.03 (0.85)
0.10 (2.84)
0.15 (4.25)
0.20 (5.67)
0.30 (8.51)
0.50 (15.59)
0.85 (24.10)
1.50 (42.53)
IM 926-3 • ROOFPAK APPLIED SYSTEMS
Relub . intervals
6 to 12 months
2 to 6 months
2 weeks to 2
months
Weekly
1 week to 1 month
Daily to 2 weeks