AC6102 Rev 0
5
28
8.3
Operation
WARNING
Pump units have a sound pressure level
higher than 85 dB(A). Hearing protection
must be worn when the pump is running.
WARNING
Do not operate the pump at or near zero flow,
i.e. closed discharge valve. Explosion could
result. Failure to follow these instructions
could result in serious personal injury and
part damage.
WARNING
Do not operate the pump unless all guarding
are in place.
8.3.1
General Procedure
1.
Close drain valves and valve in discharge line.
2.
Open fully all valves in the suction line.
3.
Slowly turn on seal water to the stuffing box. (If pumped
fluid is dirty or if leakage of air is to be prevented, these
lines should be always left open.)
4.
Prime the pump. [
NOTE:
If the pump does not prime
properly, or loses prime during start-up, it should be shut
down and the condition corrected before the procedure
is repeated.]
5.
Start the pump driver (Engines may require warming up;
consult the manufacturer’s instructions).
6.
When the pump is operating at full speed, open the
discharge valve slowly. This should be done promptly
after start-up to prevent damage to pump by operating
at zero flow.
7.
Adjust the liquid seal valves to produce the
recommended pressure for the packed stuff box.
8.3.2
Optional Checklist
NOTICE
This section applies to parameters that
contribute to assessing the performance of
the pump unit.
1.
Driver/Pump Rotation: Check the rotation each time that
the motor leads have been disconnected. Be sure that
the driver operated in the direction indicated by the
arrow on the pump casing.
2.
Flow: An accurate measurement of the flow rate is
difficult to in the field. Venturi meters, flow nozzles,
orifice plates, or timing the draw down in a wet well are
all possible methods. Record any reading for future
reference.
3.
Pressure: Check and record both suction and discharge
pressure gauge readings for future reference.
4.
Power: Record voltage, amperage per phase, kilowatts if
an indicating wattmeter is available, and the pump
speed.
5.
Temperature: Check and record the bearing temperature
using a thermometer. Temperature should not exceed
225°F [107°C] for polyurea-greased bearings and180°F
[82°C] for lithium-greased bearings.
8.4
Shutdown
WARNING
Escaping pressurized liquids. Liquid draining
from the pump could result in personal injury
and equipment damage.
NOTICE
This section applies to the complete pump
unit. See also installation and operating
instructions for the driver, (electric motor or
diesel engine), and controller.
The following steps will take care of most normal shutdowns
of the pump, i.e. maintenance or to make any further
adjustments of process piping, valves, etc., as required.
1.
Shut off power supply to the driver.
2.
Close suction and discharge valves.
3.
Close seal liquid valves. (If pumped liquid is dirty, or if
leakage is to be prevented, these lines should always
be left open, except when the pump is completely
drained.)
4.
Open drain valves as required.
8.5
Returning to service
After long-term storage and before commissioning, check
seals, bearings, and lubrication.
8.6
Freeze Protection
CAUTION
If heat is used to keep the pump from
freezing, do not let the temperature rise
above 150°F [66°C].
Pumps that are shut down during freezing conditions should
be protected by one of the following methods:
1.
Drain the pump; remove all liquid from the casing.
2.
Keep fluid moving in the pump and insulate or heat the
pump to prevent freezing.
8.7
Field testing
A performance curve for the pump-unit is included in the
document package shipped with the pump unit or it can be
obtained from A-C Fire Pump. This can be used in
conjunction with a field test, if one is required.
All A-C Fire Pump tests and curves are based on the
Hydraulic Institute Standards. Any field tests must be
conducted according to these standards.
Unless otherwise specifically agreed, all capacity, head, and
efficiencies are based on factory tests using clear water at a
temperature not greater than 85°F [29°C].
Содержание AC Fire Pump 8100 Series
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Страница 41: ...AC6102 Rev 05 40 Table 14 Troubleshooting List...
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