IMI-CPP - page 6

BULLETIN IMI-CPP
JUNE 2011
PAGE6
spring adjustment nut in pilot positioner until pressure gaugeon transducer reads
ninePSIG. Repeat steps threeand four.
Start-upCheckList
With the fans correctly installed and checksmade formounting bolt and other
hardware tightness, the following, final safety checks are required toprevent
injury topersonnel or damage to theequipment:
1. Check for correct supplyvoltagesandmotor overloads.
2. Removeall material from fan casings, ducts, and areas in front of inlets.
3. Check bladepitch control assemblies for freedom of operation and integrityof
all hardware. Check that control assembliesdo notmoveblades to settings that
exceed themaximum settingson the fannameplates, and that the control
assemblies return blades tominimum settingsupon disconnect of actuator
power.
4. 'Bump'motors to check fan rotations. Rotationsare counter-clock-wise
(CCW) looking into the fan inlet.
5. Start fans. Checkmotor amperages in each phase for balance and correctmotor
loads.
6.Check vibration levels (see
CHART1
) and for unusual sounds.
CHART 1: VIBRATION LIMITS
VibrationDisplacement inMils
MeasuredPeak toPeak
FANRPM
ALARM LEVEL
SHUTDOWNLEVEL
900
4.8
10.8
1200
3.5
7.8
1800
2.3
5.3
D. MAINTENANCE
General
Thebasic design and precision construction of ChicagoBlower CorporationCPP
fans is intended to providea long, trouble-free life. Thewheelsare staticallyand
dynamicallybalanced after assembly. Completely assembled fansare given
running balancesduring final inspectionbefore shipment. To insure long lifeand
trouble-free service, routine inspectionsandmaintenance should beobserved.
Maintenance personnel should bealert for excessivevibration or unusual sounds.
Lubrication
NOTE:
Fanwheelsand blade control mechanisms contain anumber of self
lubricated bearings.
CAUTION:
Mixingof lubricants isnot recommended.
Cleanliness is important in lubrication. Lubricants should be fresh and free from
contamination, and care should be taken toproperly clean theareasaround grease
inlets to prevent contamination.
During factory assembly, ChicagoBlower CorporationCPP fan bearings
requiring lubricantsare providedwithan adequate supply, however, following
start of operation thosebearingsmust be re-lubricated in accordancewith the
proper schedule. ChicagoBlower Corporation's recommended re-lubrication
schedules for specificCPP fan partsare listed below.Motor, rotating union, and
pilot positionermanufacturers' recommended schedulesare includedwith the
fans.
1,2,3,4,5 7,8,9,10,11
Powered by FlippingBook