Maintenance and Service
www.DaikinApplied.com 109
IM 926-3 • ROOFPAK APPLIED SYSTEMS
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
or
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. 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
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
) 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.
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 and lockout/tagout the
disconnects. Add one half of the recommended amount
shown in
. 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
. For any applications that are not in the ranges of the
table, contact Daikin.
CAUTION
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
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
Table 25: Recommended Fan Relubrication Grease Charge
Shaft Size
[inches (mm)]
Weight
[Ounces (grams)]
1/2 to 3/4 (13-20)
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)
Summary of Contents for RoofPak RCS Series
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