Xylem 1580 Series In-Line Mounted Centrifugal Fire Pumps AC2516 - Manual (Page 4)

4
PIPING
Always install a section of straight pipe between the suction
side of the pump and first elbow or install an A-C Fire
Pump Systems Suction Diffuser. This reduces turbulence of
the suction by straightening out the flow of liquid before it
enters the pump. The length should be equal to five times the
diameter of the pipe.
Be sure to eliminate any pipe-strain on the pump. Support the
suction and discharge pipes independently by use of pipe
hangers or ground supports close to the pump. A support can
be bolted to the underside of the pump body but it must be so
constructed as to allow freedom of movement with the normal
expansion of the piping.
If the pump is to be mounted in vertical piping with the motor
in the horizontal position provide adequate support to prevent
strain on pump parts and piping. It is not recommended that
pump be mounted with the motor vertically downward. Do not
use motor lift rings as a means of suspending the pump.
Line up the piping so that the bolt-holes in the pump flanges
match the bolt-holes in the pipe flanges. DO NOT ATTEMPT
TO SPRING THE SUCTION OR DISCHARGE LINES INTO
POSITION. Bearing wear will result if suction or discharge lines
are forced into position. The code for Pressure Piping
(A.S.A.B. 31.1) lists many types of supports available for vari-
ous applications.
As a rule, ordinary wire or band hangers are not adequate to
maintain alignment. It is very important to provide a strong,
rigid support for the suction and discharge lines.
Where considerable temperature changes are anticipated,
fittings for absorbing expansion should be installed in the
system in such a way as to avoid strain on the pump.
On an open system with suction-lift, use a foot-valve of equal
or greater area than the pump suction piping. Prevent clogging
by using a strainer at the suction inlet next to the foot-valve.
The strainer should have an area three times that of the
suction pipe with a mesh hole diameter of no less than 1 /
4
".
An A-C Fire Pump Systems Check Valve installed in the dis-
charge line will serve to protect the pump from water hammer,
as an isolation valve for servicing and for throttling.
NOTES:
1. The pipeline should have isolation valves around the pump
and have a drain valve in the suction pipe.
ROTATION
Pump rotation is clockwise when viewed from back of the
motor. An arrow is provided to show direction of rotation.
GENERAL INSTRUCTIONS
1. Keep the motor properly lubricated.
2. When there is a danger of freezing, drain the pump.
3. Inspect pump regularly for leaky seals or gaskets and loose
or damaged components. Replace or repair as required.
LUBRICATION
Your Series 1580 Inline Fire Pump has been lubricated at the
factory, future lubrication should be in accordance with the
motor manufacturers instructions.