Bell & Gossett P5002169C Series VSCS - Manual (Page 8)

6
LOCATION
Locate the pump so there is sufficient room for
inspection, maintenance, and service. If the use of
a hoist or tackle is needed, allow ample head
room. For outdoor installations, it is advisable to
shelter the pump unit.
WARNING: Falling Objects Hazard
Eyebolts or lifting lugs, if provided are for lifting
only the components to which they are attached.
Failure to follow these instructions could result in
serious personal injury or death, or property
damage.
The best pump location for sound and vibration
absorption is on a concrete floor with subsoil
underneath. If the pump location is overhead,
special precautions should be undertaken to
reduce possible sound transmission. Consult a
sound specialist.
If the pump is not on a closed system, it should be
placed as near as possible to the source of the
liquid supply, and located to permit installation with
the fewest number of bends or elbows in the
suction pipe.
Figure 5: Pump Location
The installation must be evaluated to
determine that the Net Positive Suction Head
Available (NPSHA) meets or exceeds the Net
Positive Suction Head Required (NPSHR), as
stated by the pump performance curve.
The pump must be primed before starting.
Whenever possible, the pump should be
located below the fluid level to facilitate
priming and ensure a steady flow of liquid.
This condition provides a positive suction
head on the pump. It may also be possible to
prime the pump by pressurizing the suction
vessel.
Important
Do not install and operate Bell & Gossett
Pumps, 3D Valves, Suction Diffusers, etc., in
closed systems unless the system is
constructed with properly sized safety
devices and control devices. Such devices
include the use of properly sized and located
pressure relief valves, compression tanks,
pressure controls, temperature controls, and
flow controls as appropriate. If the system
does not include these devices, consult the
responsible engineer or architect before
making pumps operational.
FOUNDATION
The concrete foundation or isolation pad must be
substantial enough to absorb vibration (Hydraulic
Institute Standards recommends that the
foundation weigh at least five times the weight of
the pump unit). It must form a permanent and rigid
support for the base plate and should be built to
suit local conditions. This is important in
maintaining the alignment of the flexibly coupled
unit. Do not use the base as the isolation pad.
Foundation bolts of the proper size should be
embedded in the concrete with either of the
methods shown in Figure 6. See Table 2 for
anchor bolt hole and anchor bolt sizes. Allow the
foundation to cure for several days before
proceeding with the pump installation.
Figure 6: Foundation
Table 2: Anchor Bolt/Hole Sizes
Diameter of Anchor
Bolt Hole
Diameter of Anchor
Bolt
1.125” 1.000”
1.375” 1.250”