Xylem Bell & Gossett e-80SCXL Series, Инструкция по эксплуатации

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Operation at reduced capacity
WARNING:
Never operate any pumping system with a blocked suction and discharge. Operation, even
for a brief period under these conditions, can cause confined pumped fluid to overheat,
which results in a violent explosion. You must take all necessary measures to avoid this
condition.
CAUTION:
Avoid excessive vibration levels. Excessive vibration levels can damage the bearings,
stuffing box or seal chamber, and the mechanical seal, which can result in decreased
performance.
NOTICE:
• Avoid increased radial load. Failure to do so can cause stress on the shaft and bearings.
• Avoid heat build-up. Failure to do so can cause rotating parts to score or seize.
• Avoid cavitation. Failure to do so can cause damage to the internal surfaces of the pump.
Operation under freezing conditions
NOTICE:
Do not expose an idle pump to freezing conditions. Drain all liquid that is inside the pump
and the flush lines. Failure to do so can cause liquid to freeze and damage the pump.
5.5 Shut down the pump
1. Slowly close the discharge valve.
2. Shut down and lock the driver to prevent accidental rotation.
5.6 Vibration
After startup, vibration can be measured on the pump bracket at the base of the horizontal
(H), vertical (V), and axial (A) directions. The maximum expected value is 0.15 in/sec (3.8
mm/sec) RMS (ANSI/HI 9.6.4) when operating in the Preferred Operating Range (POR)
flows from 70% to 120% of the best efficiency point (BEP) (ANSI/HI 9.6.3). Operation
outside the POR, but within the Allowable Operating Range (AOR) from minimum flow to
85% of the end of the curve increases the vibration value by 30%. If the vibration recorded
exceeds these values, shut down the pump, diagnose and fix the problem, re-start, and re-
check the vibration.
5 Commissioning, Startup, Operation, and Shutdown
20 Series e-80SCXL INSTRUCTION MANUAL