Crane WEINMAN 100, Инструкция по установке и эксплуатации

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Some pumps are equipped with three phase motors. Three
phase motors require magnetic starters, and can run in
either direction, depending on how they are connected to
the power supply.
7. ROTATION
The rotation is indicated by an arrow on the casing, and
the correct rotation of three phase motors should be estab-
lished before assembling the coupling on base mounted
units. The pump should not be operated backwards or in
reverse rotation. If the motor operates in the wrong rota-
tion, interchange any two of the lead wires and the correct
rotation will result.
8. GROUNDING MOTOR
WIRING TO THIS PUMP MUST BE INSTALLED
AND MAINTAINED IN ACCORDANCE WITH
THE NATIONAL ELECTRICAL CODE OR
YOUR LOCAL ELECTRIC CODE. IF MORE
INFORMATION IS NEEDED, CALL YOUR
LOCAL LICENSED ELECTRICIAN OR YOUR
POWER COMPANY.
It is required that a permanent ground connection be made
to the unit using a conductor of appropriate size from a
metal underground water pipe or a grounded lead in the
service panel. Do not ground to a gas supply line. Do not
connect to electric power supply until unit is permanently
grounded. Connect the ground wire to the approved
ground and then connect to the terminal provided.
NOTE: CENTRIFUGAL PUMPS SHOULD NEVER
BE STARTED OR RUN DRY. OPERATING
A PUMP DRY WILL CAUSE SCORING OF
THE MECHANICAL SEAL, RESULTING IN
PREMATURE SEAL FAILURE. TO PREVENT
THE PUMP FROM BEING RUN DRY, IT SHOULD
BE PRIMED BEFORE STARTING.
9. FLOODED SUCTION PRIMING
This method of priming a pump is relatively simple. The
liquid source is located above the pump and all that is
necessary to prime the pump is to open the air vent valve
or plug in the pump casing and to crack the gate valve
in the suction line. The suction line and pump should be
filled slowly until a steady stream of liquid is observed
flowing from the air vent. After the pump is operating, it is
recommended that the air vent valve or plug be opened
again to insure that all air has been expelled from the
pump casing.
10. SUCTION LIFT PRIMING
A foot valve should be used for priming on suction lift
applications. The foot valve, located at the end or foot of
the suction piping, functions as a check valve and allows
flow in one direction only, toward the pump. Otherwise, all
the liquid will drain from the pump and suction piping back
into the sump after shutdown.
Initial priming is accomplished by completely filling the
suction piping and pump casing with the liquid to be
pumped. This can be done by removing the air vent valve
or plug at the top of the pump casing, and inserting a
pipe nipple in the orifice with an appropriate increaser to
accommodate a hose connection. A priming line can also
be inserted in the discharge piping between the check
valve and the pump, or the priming can be done with a
bucket and funnel. The important thing is to completely fill
the suction pipe and pump casing with liquid.
When the pump is started, the vacuum created by pumping
the priming fluid, combined with atmospheric pressure in
the liquid well, forces liquid into the suction piping, thus
opening the valve and keeping it open until the pump
is shut down. When the pump is shut down, The liquid
being pumped reverses its flow causing the valve to close.
The liquid is now trapped in the suction piping and pump
casing, thus maintaining a prime on the pump.
11. VACUUM PRIMING
Vacuum priming consists of removing air from the pump
casing and suction piping and drawing liquid into them by
means of a vacuum creating device. The types of vacuum
equipment range from a simple hand pump to a complex
central priming system. Your specific priming requirements
will govern what type of vacuum primer you use.
12. STARTING
For initial starting, the gate valve in the discharge line
should be closed, and opened gradually as the motor
approaches full speed, usually in from five to ten seconds.
After the pump has once been in operation so that the
discharge line has been completely filled, it is then
unnecessary to close the gate valve in starting.
13. SEASONAL SERVICE
To Take Out Of Service:
1. Drain the liquid from the pump to prevent freezing
and damage to the pump body. It is recommended
that a good rust inhibitor be put into the liquid end
to prevent excessive corrosion. Keep the motor
dry and covered.
2. To drain, remove the drain plug which is located
below the suction inlet of the pump. Drain the
suction pipe to a point below the frost line.
All other pipes, which may be exposed to freezing
temperatures, should also be drained.
3. Remove the priming plug. This will help the pump
body to drain by permitting air to enter the case.
To Place Pump Back Into Service:
1. Replace all drain plugs previously removed, using
pipe joint compound on all male threads.
2. If the suction line has been removed, be certain
that it is re-connected.
3. Check to be certain that the pump shaft turns
freely.
4. Prime and start.