Armstrong 4380 Series Panduan Petunjuk Pemasangan dan Pengoperasian - Halaman 6
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i nstal la ti on &
o p era t i n g i n stru ction s
6
strain is imposed on the pump flanges. Tell-tale pieces of
equipment such as springs or 'waffle' style isolation pads
that distort with pressure to indicate added piping weight,
should be used under pump supports should the pump
not be truly pipe mounted.
• Various installation arrangements are detailed on
pages 9 - 11
1 Vertical In-Line pumps may be installed directly in the
system piping with no additional support. Pipe hang-
ers are simply sized for the additional weight of the
pumping unit. Many pumps are installed in this manner
and are mounted at sufficient height to take zero floor
space. (fig . 2 .1)
2 Piping in many mechanical rooms is hung close to the
ceiling and larger pumps are mounted near ground
level for ease of maintenance. fig 2 . 2 illustrates such
an arrangement with the piping supported at the
ceiling and the vil unit installed with an Armstrong
Suction Guide and triple function Flo-Trex valve. Many
very large vil pumps are installed in this manner.
3 Should additional space saving be required the dis-
charge spool piece and Flo-Trex valve may be replaced
by a long-radius elbow and the Flo-Trex valve field
converted to a straight-through valve and installed in
the vertical discharge pipe. (fig 2 .3)
4 fig 2 . 4 illustrates a similar arrangement to fig 2 . 2
with additional floor mounted pipe-stools isolated
from the structure by 'waffle' style neoprene isolation
pads under the Armstrong Suction Guide and Flo-Trex
Valve.
5 Floor mounted saddle supports (fig . 2 .5) are typical
for condenser water pumps where cooling tower base
is near mechanical room elevation.
6 Where required, additional floor support may be used
as shown in fig . 2 .6. Note that the pump should not
be rigidly attached to the column. Leave a small gap
between pump and column or install a 'waffle' isola-
tion pad under the pump. It is critical that piping be
installed in such a manner that the pump does not
become a pipe support.
7 fig . 2 .7 illustrates stanchion plates at the pump inlet
and outlet ports that may be supplied for installation
convenience. Isolation pads must be used under the
legs and monitored as pipe hangers are adjusted to
ensure the pump flanges are not supporting the piping.
Bolting to the floor or housekeeping pad is not recom-
mended. If the stanchions are bolted down the bolts
must be isolated from the stanchion or an inertia base
and flexible pipe connectors used.
8 fig . 2 . 8 illustrates installations with stanchion plates
for seismically active regions. Seismically rated isola-
Series 4300, 4360 and 4380
Vertical in–line pumps
tion pads or snubbers with bolts isolated from the
stanchion plates are installed to restrain the pump
during a seismic event. Pipe hangers carry the weight
of the equipment as seismic components are designed
only to restrain the equipment during a seismic event.
9 Close coupled in-line units (Series 436 0 & 438 0)
up to 15 hp / 11 kW may be installed with the shaft
horizontal. (fig . 2 .9) For horizontal mounting of large
units or Series 430 0 Split-Coupled style consult the
factory.
10 Many Vertical In-Line pumps are piped successfully
into grooved piping systems. In-line pumps are sup-
ported well by grooved piping however flange adapter
locking devices or a welded flange at the pump should
be used to prevent the possibility of pipe mounted
pumps rotating in the piping. Armstrong offers
grooved suction guides with cast-in outlet flanges and
triple function Flo-Trex valves with inherent locking
devices to prevent this possibility. (fig . 2 .10)
11 Do not support the unit by the motor eye bolts (fig .
2 .11) or by any other part of the motor.
12 Connecting the pump to a permanent rigid base (fig .
2 .12) is not recommended unless isolated from the
piping by flexible connectors and the base isolated
from the building structure on an inertia base. (fig .
2 .12 is generally acceptable when using plastic piping).
important:
All Series 43 0 0 pumps contain a tapped hole in the motor
bracket above the discharge flange (see fig . 2 .13) for draining
the well. Pipe this drain hole to a floor drain to avoid overflow of
the cavity caused by collecting chilled water condensate or from
seal failure.
3 .
pump piping - gener al
• Never connect a pump to piping, unless extra care is
taken to measure and align the piping flanges well.
Always start piping from pump.
• Use as few bends as possible and preferably long radius
elbows.
• Do not use flexible connectors on the suction or discharge
of a vertical in-line pump, unless the pump is rigidly
mounted to a foundation.
• Ensure piping exerts no strain on pump as this could
distort the casing causing breakage or early failure due to
pump misalignment.
• All connecting pipe flanges must be square to the
pipework and parallel to the pump flanges.
• Suction and discharge pipes may be increased or