I-120
GH Pump 120 – 16.02.EN
14
D. OPERATING CHECKS.
1. Check for undue vibration or noise. If any
occurs and does not stop within a short period
of time, turn off the pump. For determination of
the cause and its remedy refer to
Troubleshooting in Section IX or consult Carver
Pump Company.
2. Check mechanical seals or packing rings for
leakage.
3. Check for adequate lubricating liquid flow to the
seal or packing.
4. Check that pump is operating within design
criteria and perimeters. Check and record flow
and pressure readings. The flow and pressure
readings should be within the operating system
guidelines and similar to number stamped on
the pump nameplate.
5. Check and record bearing temperature. It
should not exceed 70º C (160º F). Both inboard
(18) and outboard (16) ball bearing
temperatures should be measured and recorded
at a minimum of 15 minute intervals until the ball
bearing temperatures stabilize. Stabilization of
ball bearing temperature can be defined as the
results of three consecutive readings at
approximately 15 minute intervals with no
temperature rise.
6. Check and record power input to the motor.
7. Check and record vibration.
E. STOPPING THE PUMP.
WARNING
When pump is handling hazardous fluid,
extreme care must be taken to ensure safety of
personnel when attempting to drain pump.
Suitable protection devices should be used
and/or protective clothing should be worn.
1. If the pump is being stopped for overhaul, slowly
close the discharge valve. Otherwise leave
discharge valves set at condition.
2. Stop the pumping unit in accordance with the
directions on the electrical power supply.
3. Tagout and lockout power to motor according to
OSHA Standard 1910.147.
4. Close discharge and suction valves and any
auxiliary fluid lines.
5. The pumping unit is now off.
F. INDEFINITE SHUTDOWN.
Stop the pumping unit per Section VIII, Paragraph E.
Remove casing plug to drain casing. Drain all piping if
there is a possibility of liquid freezing. Relubricate
bearings. Provide pump and driver with a protective
cover.
Measures to be taken for prolonged shutdown of
installed pumping unit. If the pumping unit remains
installed a periodic check of operation is in order to
make sure that the pump is always ready for instant
start-up and to prevent the formation of deposits within
the pump and the pump intake area. Start up the
pumping unit regularly once a month or once every 3
months for a short time (approximately 5 minutes)
during prolonged shutdown periods. Prior to operation
check run ensure that there is sufficient liquid available
for operating the pump.
IX. TROUBLESHOOTING OPERATING
PROBLEMS.
If you have followed the installation and starting
procedures outlined in this manual, the pump should
provide reliable service and long life. However, if
operating problems do occur; significant time and
expense can be saved if you refer to Table 3 to
eliminate the most common causes of those problems.
NOTE
Immediate action to be taken before
proceeding with corrective actions in Table 4 is
to stop the pump, refer to Section VIII,
Paragraph E.
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