Armstrong 4600 HSC series Installation And Operating Instructions Manual - Page 9
Browse online or download pdf Installation And Operating Instructions Manual for Water Pump Armstrong 4600 HSC series. Armstrong 4600 HSC series 16 pages. Horizontal split case fire pumps. 12x8x18f
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b. diesel engine driven
• Open suction gate valves
• Check that pump is full of water and that all air contained
in pump has been allowed to escape through the air
release valve
• Compress packing evenly with gland (gland nut should be
finger tight)
• Close the main relief valve using the maximum spring
pressure
• Bring the timer setting down to one minute for automatic
start test purpose
• Start engine manually on either battery
• Adjust main relief valve (mrv) spring to allow valve to
fully open
• Stop engine and open system butterfly valve
• Bleed the system by opening a valve on the pressure sensing
line to create a pressure drop
• As soon as fire pump starts, check engine speed and adjust to
pump rated speed with throttle
• Check packing adjustment to obtain slight leak of approxi-
mately one drops per second
• After running for one minute (time set on the running period
timer), stop pump with stop button. If you try stopping it
before the time set on the timer, the pump will not stop
• Bleed again until desired start-up pressure is attained
• Allow Jockey pump to run to stop pressure setting
start-up procedure
(flow test procedure if required by authorities)
• Close system butterfly valve.
• Open gate valve to hose outside header for flow test or flow
meter discharge valve
• Press start button to start pump
• Adjust flow by the quantity of hose valves opened or with
pump discharge valve if using flow meter
• Take gauge and ammeter readings at 150% of rated flow,
shutoff and other intermediate flows
• When test is finished, close gate valve
Horizontal split case
fire pumps
2.5. automatic operation
• Open system butterfly valve and turn all the isolating valves
to the fully open position
• Place the main disconnect switch on the on position
• Switch fire pump circuit breaker to the on position
• Switch the jockey pump to auto (the power on light
must be lit)
note
• When the operating differential of pressure switches do not per-
mit these settings, the settings should be as close as equipment
will permit
• The settings should be established by pressures observed on test
gauges
• All devices are preset at the factory and should normally require
no further adjustment
• A final adjustment may be made on any control to match the
exact system requirements
after start-up, make sure ...
• To open system butterfly valve
• To bring minimum run timer back to 30 minutes
• Valve on pump suction must be fully open as throttling on suc-
tion side is harmful to the pump
• Pump will not run dry. Most centrifugal pumps have close clear-
ances and cannot run dry without serious damage resulting
3.0. maintenance
hsc pumps are built to operate without periodic maintenance. A
systematic inspection made at regular intervals, giving
special attention to the following, will ensure years of trouble-
free operation.
3.1. general care
• Keep unit clean
• Provide the motor with adequate overload protection
• Keep flying chips or other loose particles away from the
ventilating openings of the motor
• Avoid operating the unit in overheated surroundings
i n s ta l l at i o n &
o p e r at i n g i n s t r u c t i o n s
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