IM 926-3 • ROOFPAK APPLIED SYSTEMS 110 www.DaikinApplied.com
Maintenance and Service
Bearing Replacement
The following instructions must be read in entirety before
attempting installation or removal. The procedures indicated
should be carefully followed. Failure to do so can result in
improper installation which could cause bearing performance
problems as well as serious personal injury.
Bearings in Bolt-on Housings (Units)
1. Check area - Clean and organize bearing installation
area and keep well lit. Be sure mounting surfaces are
clean and flat.
2.
Check shaft - Shaft should be within tolerance range
, clean, and free of nicks and burrs.
Mount bearing on unused section of shafting or repair/
replace shafting as required.
3.
Install unit - Slide unit onto shaft. If it is difficult to
mount bearing on shaft, use a piece of emery cloth to
reduce any high spots on shaft. Do not hammer on any
component of the bearing.
4. Fasten unit in place - Install housing mounting bolts,
check and align bearing and tighten mounting bolts to
recommended fastener torques. Exercising extreme
caution and safety, rotate shaft slowly to center bearing.
Table 26: Shaft Size Tolerances
Shaft Size (in)
Tolerance
1/2 to 1-7/16
+0 and -0.001
1-11/16 to 2-7/16
+0 to -0.0015
2-7/16 and up
+0 to -0.002
Table 27: Recommended Lubricants for Fan Shaft Ball
Bearings
Name
Temperature
Base
Thickener
NLGI grade
Texaco,
Premium RB
30° to 350°F
(34° to 177°C)
Parafinic
mineral oil
Lithium
2
Mobile, AW2
40° to 437°F
(40° to 175°C)
Mineral oil
Lithium
2
Mobile,
SHC 100
68° to 356°F
(50° to 180°C)
Synthetic
Lithium
2
Chevron,
Altiplex
Synthetic
60° to 450°F
(51° to 232°C)
Synthetic
Lithium
2
Exxon, ronex
MP
40° to 300°F
(40° to 149°C)
Mineral oil
Lithium
2
NOTE:
Temperature ranges over 225°F are shown for lubricants only. High
temperature applications are not suitable for standard air handler components.
BOA Concentric Inserts
1.
Be sure that BOA Concentric collar is fitted square and
snug against the shoulder on the inner ring.
2. Torque BOA Concentric collar cap screw to torque
recommended in
Table 28: Recommended Torque Values for Concentric
Locking Bearing/Shaft Size
Fan Size (in .)
Bore Size (in .)
Torx Screw Size
Weight in lbs .
1
T-25
70
1-1/16
T-25
70
1-3/16
T-25
70
15 (FC)/24 (FCL)
1-7/16
T-27
90
24 (FCM)/27 (FC)
1-11/16
T-27
90
20 (AF)/24 (AF)
1-15/16
T-30
180
27 (AF)/40 &
49 (SWSI)
2-3/16
T-30
180
30 & 33 (AF)/
44 (SWSI)
2-7/16
T-45
400
36 (AF)
2-11/16
T-45
400
40 (AF)
2-15/16
T-45
400
NOTE:
AF = DWDI AF, FCL = Low Pressure FC, FCM = Medium Pressure FC
Monitor Installed Bearing
After bearing has been run for several minutes, and again
after several hours, check bearing for excessive noise or
vibration. Shutdown machine and check housing temperature:
typical applications operate at 100°F - 105°F (38°C - 66°C).
Tighten all locking devices after 500 hours or 3 months,
whichever comes first.
Summary of Contents for RoofPak RCS Series
Page 129: ......
