Armstrong 4600 HSC series Installation And Operating Instructions Manual - Page 5
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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• Increase the size of both suction and discharge pipes
at pump nozzle to suit pump capacity and particular
conditions of installation
• Use eccentric reducers on suction
• Lay out the suction line with a continual rise towards the
pump without high points, thus eliminating possibility of
air pockets
• Test suction line for air leaks before starting; this becomes
essential with long suction line or high static lift
pressure sensing line connection for fire pump controllers
If water pulsation causes eratic operation of the pressure
swtich or the recorder, a supplemental air chamber or
pulsation damper may be needed
Not less than ½"brass pipe
with brass fittings or
equivalent
fire pump
controller
pressure
switch
¼" plug
* Recommended location of pressure gauges (either location)
If water is clean, ground face unions with noncorrosive diaphragms drilled for C/cb" orifices may be used in place of the check valves.
ref.: nfpa pamphlet 20, fig. a-7-5.2.1
not less than 5'-0"
bronze check valve with
C/cb" orifices in clapper
½" globe valve
*
Horizontal split case
fire pumps
• Install, at pump suction, a straight pipe of a length equiva-
lent to 4 or 6 times its diameter
• Install gate valve close to pump in both suction and
discharge lines on flooded suction application; this is used
mainly to isolate the pump for inspection or repair
• Install a check valve in discharge line between pump and
gate valve
caution: Only the discharge valve must be used to
reduce the flow or shutoff the pump
indicating control valve
*
½" globe valve
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
Connect to a tapped boss or
other suitable outlet between
the indicating control valve
and check valve
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