COOK CPFB Panduan Pemasangan, Pengoperasian, dan Pemeliharaan - Halaman 7
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+200F and capable of intermittent highs of +250F. For
temperatures above 250°F Mobiltemp SHC 32 is
recommended.
Lubrication - Motor Bearings
Motors are provided with prelubricated bearings. Any
lubrication instructions shown on the motor nameplate
supersede instructions below.
Motor bearings without provisions for relubrication will
operate up to 10 years under normal conditions with no
maintenance. In severe applications, high temperatures or
excessive contaminates, it is advisable to have the
maintenance department disassemble and lubricate the
bearings after 3 years of operation to prevent interruption of
service.
For motors with provisions for relubrication, follow
intervals of the following table.
Relubrication Intervals
Up to and
Service
including 184T
Conditions
1800 RPM
Over 1800
and less
RPM
Standard
3 yrs.
6 months
Severe
1 yr.
3 months
Motors are provided with a polyurea mineral oil NGLI #2
grease. All additions to the motor bearings are to be with a
compatable grease such as Exxon Mobil Polyrex EM and
Chevron SRI.
The above intervals should be reduced to half for vertical
shaft installations.
Motor Services
Should the motor prove defective within a one-year
period, contact your local Loren Cook representative or
your nearest authorized electric motor service
representative.
Changing Shaft Speed (belt drive)
All belt driven fans with motors up to and including 5 HP
(184T max.) are equipped with variable pitch pulleys. To
change the fan speed, perform the following:
1. Loosen setscrew on driver (motor) pulley and remove
key, if equipped.
2. Turn the pulley rim to open or close the groove facing.
If the pulley has multiple grooves, all must be adjusted
to the same width.
3. After adjustment, inspect for proper belt tension.
Speed Reduction: Open the pulley in order that the belt
rides deeper in the groove (smaller pitch diameter).
Speed Increase: Close the pulley in order that the belt
rides higher in the groove (larger pitch diameter). Ensure
that the RPM limits of the fan and the horsepower limits of
the motor are maintained.
NEMA Frame Size
213T-365T
404T and larger
1800 RPM
Over 1800
1800 RPM
Over 1800
and less
RPM
and less
2 yrs.
6 months
1 yr.
3 months
1 yr.
3 months 6 months 1 months
Maximum RPM
Maximum RPM
CA SWSI,
CPS-A,
Class
CPA-A, Size
I
120
3348
135
2976
150
2678
165
2435
180
2114
195
1951
210
1812
225
1691
245
1553
270
1419
300
1277
330
1161
365
1064
402
965
445
873
490
793
540
719
600
647
660
588
730
532
Maximum RPM
CF SWSI,
RPM
CPS, CPA,
Class
Size
I
60-100*
4230
120
3404
135
3026
150
2723
165
2476
180
2269
195
2095
210
1795
225
1675
245
1539
300
1257
330
1142
365
1023
402
939
445
849
490
771
540
700
600
630
660
573
730
518
*Sizes 60 through 100 only applies to CPS
and CPA.
RPM Derating Factor
For elevated airstream temperatures, the max-
imum fan speed limits must be derated by the
factors above.
7
CA & CAF
DWDI
Class
Class
Size
II
III
4368
5503
120
3883
4892
135
3494
4403
150
3177
4002
165
2757
3474
180
2545
3207
195
2363
2978
210
2206
2779
225
2026
2553
245
1851
2332
270
1666
2099
300
1514
1908
330
1388
1749
365
1259
1586
402
1138
1434
445
1034
1303
490
938
1182
540
844
1064
600
768
967
660
694
874
730
CPV
Size
Standard Reinforced
Class
Class
II
III
60-100
120
5519
6953
135
4441
5595
150
3948
4974
165
3553
4476
180
3230
4069
195
2961
3730
210
2733
3443
225
2341
2950
245
2185
2753
270
2007
2529
300
1639
2065
330
1490
1877
365
1334
1681
402
1225
1543
445
1108
1396
490
1006
1268
913
1150
822
1035
747
941
675
851
Temperature
RPM Factor
(°F)
Steel
Aluminum
70
1.00
1.00
200
0.98
0.93
300
0.96
0.79
400
0.94
500
0.91
600
0.87
700
0.81
800
0.75
Maximum RPM
Class
Class
Class
I
II
III
3714
4846 6105
3307
4315 5436
2575
3357 4230
2374
3095 3901
2176
2839 3577
2009
2621 3302
1865
2434 3066
1741
2271 2862
1631
2128 2681
1443
1883 2372
1262
1647 2074
1147
1496 1885
1038
1354 1706
941
1228 1547
851
1110 1399
773
1009 1271
702
916
1164
631
823
1037
574
749
944
519
677
853
Maximum RPM
2719
2527
2093
--
2035
1766
1588
1429
1571
1277
1407
1152
1265
1015
1260
876
1091
837
1006
716
869
624
805
539
701
463
660
360
576
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