Flowserve Byron Jackson Type M - Manual (Page 46)

® Byron Jackson Double Mechanical Seal Submersible Pumping Unit • 1042.293/9 • June 04
Page 46 of 68
5 COMMISSIONING STARTUP, OP-
ERATION AND SHUTDOWN
5.1 Safety instructions
NOTE Before commissioning, operation or
shutdown of the pumping unit, read
Chapter 1.6 "Safety", Page 6.
The pumping unit may only be operated
•
by trained personnel,
•
in a completely assembled condition, and
•
completely filled and immersed.
5.2 Direction of rotation
The direction of rotation of motor and pump is
given in Chapter 12.2 "Data sheet".
5.3 Starting the pump
5.3.1 First-time start-up of the pump
1. Measure insulation resistance (leads-to-
ground) with power turned off and motor
turned off to ascertain that not short circuits
are present.
CAUTION Do not attempt to start the pumping
unit with an insulation resistance
reading of less than 5 M
Ω.
2. Verify that balanced three-phase voltage is
supplied by taking readings with the line volt-
meter and using the voltmeter selector switch.
CAUTION Never attempt to run the pumping
unit with an unbalanced voltage be-
tween two leads.
An imbalance between two leads
can cause 6 - 10 times that amount
of imbalance in an amperage and the
resultant temperature increase
means a decrease in motor life.
Poor voltage regulation of an engine
driven generator, if the power is ob-
tained from such a source, can be
very detrimental.
3. Close the pump discharge valve.
4. Start the motor.
The contractor closes and the pump motor
starts.
CAUTION Do not run the pump for more than
2 minutes with discharge valve
closed.
5. Immediately take current reading using line
ammeter.
If the current is in the range of amps at shut-
off (see Chapter 12.2 "Data sheet"), rotation is
correct.
If current is about 80 % of shut-off amps, rota-
tion is not correct. In this case,
a. press STOP
b. turn off all power
c. move isolator handle to OFF
d. reconnect motor leads for proper rotation.
Mark the leads so that they can always be
placed correctly any time they are removed.
6. After verifying proper rotation,
•
stop the pumping unit.
•
open the discharge valve
•
start the pumping unit again.
7. Recheck the current, which should be the full
load current as shown in Chapter 12.2 "Data
sheet".
Current could also be the same as full load
amps with reversed rotation but head and flow
would be greatly reduced.
CAUTION If a circuit breaker trips, always wait
at least 10 minutes before resetting.
During first-time start-up, take notice of the follow-
ing:
•
When motor is started, it should attain full
speed within 3 seconds.
If after this period the line current is still high
(over twice normal value), the pumping unit is
not attaining the full speed.