Armstrong Design Envelope 4392 Installations- und Betriebsanleitung - Seite 6

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i nstal la ti on &

o p era t i n g i n stru ction s

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