OMM-05-0509-page 6
NOTICE: Failure to complete and document all the following pre-startup and both post-startup
checks, listed in sections A (below) and B on pages 7 and 8, could void all warranties.
Blower Sheave
IV. INITIAL UNIT STARTUP
A. Pre-Startup & Post-Startup Checks: (Check blocks as each step is completed. Retain this for your records.)
A1. Pre-Startup Checks Completed By: _______________________________
DATE: ___________________
A2. 8 Hour, Post-Startup Checks Completed By: ____________________
DATE: ___________________
A3. 3 Day, Post-Startup Checks Completed By: __________________
DATE: ___________________
MAKE SURE POWER TO THE MOTOR IS LOCKED OUT BEFORE STARTING PRE-START OR POST-START CHECKS.
1.
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Check all blower, foundation and duct work hardware to make sure it is tight.
2.
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Check all blower wheel, sheave and bearing set screws to make sure they are tight per
Table 1
on page 5.
3.
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If the blower wheel or sheaves have a taper-lock bushing, make sure the bolts are tightened per
Table 2
on page 5.
4.
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Make certain there is no foreign material in the blower or duct work that can become a projectile.
5.
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Make sure any inspection doors in the blower housing or duct work are securely bolted or locked.
6.
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Ensure all electrical power components are properly sized and matched for your electrical system.
7.
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Check the blower wheel, by turning the shaft by hand, to ensure it rotates freely.
8.
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Check sheaves (not supplied by Cincinnati Fan) for proper alignment and belts for proper tension.
9.
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Check that all required guards (not supplied by Cincinnati Fan) are properly secured.
10.
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Any dampers should be fully opened, then fully closed to make sure there is no binding or interference.
11.
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If your blower is mounted on an elevated support structure, make sure the structure is welded at all the joint con-
nections, welds have not cracked and the structure is properly braced to prevent “side sway”.
12.
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Close any dampers to minimize the load on the motor, especially on blowers with high temperature construction.
Never
subject a “
cold
” blower to a “
hot
” gas stream. If the blower will be handling “hot gases” greater than 150°F
(65°C) it is imperative that the blower be subjected to a gradual rate of temperature increase, not to exceed
15°F/minute (8°C/minute). The same temperature limits are also important when the blower is experiencing a drop
in temperature until the temperature drops down to 150°F (65°C). Only, when the entire blower has reached an
equilibrium temperature of 150°F (65°C), or less, should the power be turned off.
13.
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Make sure the power source connections to the blower motor are per the motor manufacturer’s instructions.
14.
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Make sure the blower wheel is stationary prior to startup.
Starting a blower with a wheel that is rotating back-
wards can cause wheel damage.
15.
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Apply power to the blower motor momentarily (i.e. “bump start”) to check for proper blower wheel rotation. If the
blower is rotating in the wrong direction, reconnect the motor leads per the motor manufacturer’s wiring schematic.
Blower rotation is determined by viewing the blower from the motor or drive side of the blower, NOT from
the inlet side
. After reconnecting the leads, repeat this step.
See Fig. 2 below.
Clockwise (CW) Rotation
Counter-Clockwise (CCW) Rotation
Fig. 2
16.
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Apply power to the motor and let it come up to full speed. Turn off the power. Look and listen for any unusual
noise or mechanical abnormality while the blower wheel is still spinning. If any are noticed, lock out the power,
wait for the blower wheel to come to a complete stop, locate the cause and correct it.
B. Vibration:
The blower was balanced at the factory to comply with ANSI/AMCA Standard 204-05, Category BV-3. However,
rough handling in shipment and/or erection, weak and/or non-rigid foundations, and misalignment of the belts and/or
sheaves may cause a vibration problem after installation. After installation, the vibration levels should be checked by
personnel experienced with vibration analysis and vibration analysis equipment.
NOTE:
Since Cincinnati Fan did not supply and install the belts, sheaves or electrical components for this blower, it
is the purchaser’s and/or user’s responsibility to select, properly install and maintain the drives in accor-
dance with the manufacturer’s directions. The purchaser and/or user is also responsible for checking and
correcting the vibration of the completed assembly so it does not operate above the vibration limits indicat-
ed in the chart in Fig. 5 on page 8.
