AMT 25FP10YR, Инструкция по эксплуатации и запасным частям

Страница: 3 / 16

Specifications Information and Repair Parts Manual
25FP Series
25FP-250-00 3 10/2017
25FP Fire Pump Series
Connections to Pump
Since even a slight leak will affect priming, head and capacity, especially when
operating with a high suction lift, all threaded connections in the suction line
must be sealed with pipe sealant to ensure an air tight seal. Check all hose
connection gaskets; replace any that are cracked, worn or no longer elastic.
Suction Lines in Sumps/Pits
If a single suction line is installed in a sump, it should be positioned away from
the wall of the sump at a distance equal to 1-1/2 times the diameter of the
suction line.
If there is a liquid flow from an open pipe into the sump, the flow should be kept
away from the suction inlet because the inflow will carry air down into the sump
and air entering the suction line will reduce pump efficiency.
If it is necessary to position the inflow close to the suction inlet, install a baffle
between the inflow and the suction inlet at a distance 1-1/2 times the diameter
of the suction line.
Suction Line Positioning
The depth of the suction line is critical to efficient pump operation. Make certain
end of suction line is far enough under the liquid surface. If a vortex is noticed
at suction line end, submerge end deeper.
OPERATION
Review all SAFETY information in the pump General Safety Manual.
Follow the instructions on all tags, labels and decals attached to the pump.
Priming
Install the pump and piping as described in INSTALLATION section of this
manual. Make sure that all connections are air tight and the pump is positioned
level on a solid foundation.
Since this pump is not self-priming, it is equipped with either an exhaust primer
or a hand operated diaphragm priming pump.
Exhaust Primer
The exhaust primer utilizes engine exhaust gases directed through a venturi to
create a vacuum and draw air out of the suction line and pump casing.
The exhaust primer is capable of priming a pump with a maximum priming lift
of 19 feet (5.79 meters). If the pump does not prime in a reasonable length of
time, check the suction line for leaks.
To prime the pump with the exhaust primer:
• Close the exhaust primer handle (C4) and open ball valve (B32) in pump
suction vacuum line.
NOTE: It may be required to apply a coating of grease/lubricant on the outer
portion of the valve cap (C3) for a better seal to reduce priming time.
• Start the engine according to engine manufacturer instructions.
• Operate the engine at maximum throttle speed and allow primer to remove
air from suction until liquid flows from primer ejector (C7).
• When the pump is fully primed, close the vacuum line valve and release
the exhaust primer handle.
Hand Primer
The hand primer is a positive displacement diaphragm pump. Hand priming
pump is mounted directly to roll frame on a bracket (A37) that includes a
pocket to hold the primer handle (C27). Priming relies on the operator manually
stroking the handle to remove the air from the suction line and pump casing. To
prime the pump with the hand primer:
• Remove priming pump handle from bracket and install in priming pump.
• Open ball valve (B32) in pump suction vacuum line.
• Operate pump handle up and down until pump casing is full of liquid and
water starts to enter the priming pump.
• When the pump is fully primed, close the vacuum line valve.
• Start the engine according to engine manufacturer’s instructions.
Once fully primed, reduce engine speed slightly and slowly open the discharge
throttling valve. The discharge line should be filled slowly to prevent damage
to the piping, hose or gaskets. When the discharge line is completely filled,
adjust the discharge throttling valve and engine speed until desired operating
point is reached.
Leakage
No leakage should be visible at pump mating surfaces or at pump connections
or fittings. Keep all line connections and fittings tight to maintain maximum
pump efficiency.
Liquid Temperature and Overheating
The maximum liquid temperature for the pump is 180°F (82°C). Do not apply it
at a higher operating temperature than is recommended.
Overheating can occur if operated with a closed valve in the discharge (valves
should not be installed in suction line). Operating against a closed valve could
bring the liquid to a boil, build pressure and cause the pump to rupture or
explode. If overheating occurs, stop the pump and allow it to completely cool
before servicing it. Refill the pump casing with cool liquid.
Do not remove plates, covers, gauges, pipe plugs or fittings from an
overheated pump. Vapor pressure within the pump can cause parts
being disengaged to be ejected with great force. Allow the pump to
completelycool before servicing.
Strainer Check
Check the suction strainer regularly and clean it as necessary. The strainer
should also be checked if pump flow rate begins to drop. If a suction vacuum
gauge has been installed, monitor and record the readings regularly to detect
strainer blockage. Vacuum reading will increase at a given flow rate if strainer
becomes blocked.
Never introduce air, steam or high water pressure into the casing to remove
blockage in suction line or strainer. This could result in personal injury or
damage to the equipment.
Stopping
Never halt the flow of liquid suddenly. If the liquid being pumped is stopped
abruptly, damaging shock waves can be transmitted to the pump and piping
system. Close all valves slowly.
If the application involves a high static discharge head, gradually close the
discharge throttling valve before stopping the pump. The pump discharge
check valve may be damaged if liquid in the discharge piping suddenly reverses
direction when the engine is stopped.
Cold Weather Preservation
In below freezing conditions, completely drain the pump and piping system
to prevent damage from freezing. If the pump will sit idle for more than a few
hours, remove the casing and make certain all liquid has been drained. Clean
any solids from casing.