Xylem Bell & Gossett e-80SCXL Series, Instruction Manual

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Guideline Explanation/comment
Do not install and operate the equipment in closed
systems unless the system is constructed with
properly-sized safety devices and control devices.
Acceptable devices:
• Pressure relief valves
• Expansion tanks
• Pressure controls
• Temperature controls
• Flow controls
If the system does not include these devices,
consult the engineer or architect in charge before
you operate the pump.
Take into consideration the occurrence of unwanted
noise and vibration.
The best pump location for noise and vibration
absorption is on a concrete floor with subsoil
underneath.
If the pump location is overhead, undertake special
precautions to reduce possible noise transmission.
Consider a consultation with a noise specialist.
When possible, locate the pump below the fluid
level.
This facilitates priming, ensures a steady flow of
liquid, and provides a positive suction head on the
pump.
4.1.3 Piping checklist
WARNING:
• The heating of water and other fluids causes volumetric expansion. The associated
forces can cause the failure of system components and the release of high-temperature
fluids. In order to prevent this, install properly sized and located compression tanks and
pressure-relief valves. Failure to follow these instructions can result in serious personal
injury or death, or property damage.
• Avoid serious personal injury and property damage. Make sure that the flange bolts are
adequately torqued.
NOTICE:
Never force piping to make a connection with a pump.
Check Explanation/comment Checked
Check that a section of straight pipe, with a
length that is five times its diameter, is installed
between the suction side of the pump and the
first elbow, or that a B&G Suction Diffuser Plus is
installed.
This reduces suction turbulence by
straightening the flow of liquid before it
enters the pump.
Check that the suction and discharge pipes are
supported independently by use of pipe hangers
near the pump.
This eliminates pipe strain on the pump.
Check that there is a strong, rigid support for the
suction and discharge lines.
As a rule, ordinary wire or band hangers
are not adequate to maintain proper
alignment.
For pumps with flanges, check that the bolt holes
in the pump flanges match the bolt holes in the
pipe flanges.
—
Check that the suction or discharge lines are not
forced into position.
The code for Pressure Piping (A.S.A.B.
31.1) lists many types of supports
available for various applications.
Check that fittings for absorbing expansion are
installed in the system when considerable
temperature changes are expected.
This helps to avoid strain on the pump.
4 Installation
12 Series e-80SCXL INSTRUCTION MANUAL