Suction Connection; Discharge Connection; Electrical Connection - Pentair Berkeley Manual Del Usuario

Installation • General Information
NPSHR at this point
A
(450 gpm) = 10 Feet
100
1800 RPM
80
60
40
20
0
0
100 200 300
A Model B3ZRM operating at 450 GPM
A
with 68 Feet of Head has a NPSHR of.......... 10 Feet
A Model B3ZRM operating at 550 GPM
B
with 58 Feet of Head has a NPSHR of.......... 14 Feet
FIGURE 1
FOUNDATION:
Refer to illustration on page 5.
Heavy weights; risk of crushing toes or
feet. Use care and proper lifting equipment when
handling pump for installation. Size and weight of some
units will require hoists for safe handling.
Pump should be set on a concrete foundation which is
sufficiently substantial to absorb vibration and which
provides a permanent and rigid support.
When properly positioned, the unit will be level, and
the suction and discharge openings of the pump will be
aligned with system piping.
PIPING:
System piping should be at least one commercial pipe
size larger than pump connections and flow velocity
should not exceed eight (8) feet per second. Suction
and discharge pipes must be naturally aligned with
pump connections.
NOTICE: Misalignment of piping with pump case or
excessive pipe strain can cause distortion of pump
components resulting in rubbing, breakage and reduced
pump life.
Insure that piping is supported in a manner that prevents
the exertion of force on pump connections. This can be
checked by the following procedure. With the pump shut
down, remove pipe flange bolts. If the mating flanges
come apart or shift, misalignment is present and causing
pressure on the connections. Adjust pipe supports until
flanges mate without any force. This procedure can be
done throughout piping system.
NPSHR
NPSHR at this point
B
(550 gpm) = 14 Feet
400 500 600 700 800
Gallons Per Minute
EXAMPLE
ONLY
B3ZRM
30
20
10
0
Static Lift = 7.0 Feet
Total Friction Loss = 8.5 Feet
Total = 15.5 Feet
Theoretical static
lift of centrifugal
pump at sea level =
Subtract Safety Factor – 6.0 Feet
Practical Limit = 28.0 Feet
Subtract Lift and Friction
OK
NPSHA = 12.5 Feet
CAVITATION
SUCTION PIPING:
Refer to illustrations on Page 8 through Page 11 for
recommended and not recommended practices in
suction connections.
DISCHARGE PIPING:
Refer to illustrations on Pages 12 and 13 for
recommended and not recommended practices in
discharge connections.

ELECTRICAL CONNECTION:

If electric motor is used.
NOTICE: All wiring should be done by a qualified
electrician.
cause death. Disconnect power to pump before
servicing.
Check voltage and phase stamped on pump motor
nameplate before making wiring connections to
electrical system. Be sure they agree with your electric
current supply. They MUST be the same. If in doubt,
check with your local power company.
Refer to illustration on Page 14 for minimum
recommended pumping panel components that help
safeguard your pump during operation.
NPSHA
8.5 Feet total friction loss
@ 450 Gallons per minute.
9.5 Feet total friction loss
@ 550 Gallons per minute.
450 GPM 550 GPM
7.0 Feet
9.5 Feet
16.5 Feet
34.0 Feet 34.0 Feet
– 6.0 Feet
28.0 Feet
15.5 Feet 16.5 Feet
NPSHA = 11.5 Feet
Hazardous voltage. Can shock, burn, or
4
7 Feet
Static Lift
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