Pearl VPC 1, VPC 3, VPS 3, VPS 5, VPC 5 Installation And Operating Instructions Manual

INSTALLATION AND OPERATING INSTRUCTIONS

1. MODEL NUMBERING AND NAMEPLATE INFORMATION

1.1 Model numbering

VPC/VPS 5 16 SQQE

Code for
Shaft Seal

Number of Stages

Nominal Flow

Type Ranges

1.2 Nameplate format

1

2

3

5

7

9

11

1. Pump Type – Seal Type

2. Pump Model

3. Frequency

4. Rated Power

5. Speed

6. Maximum Head

7. Capacity

8. Head Range

9. Maximum Operating Pressure

10. Rotating Direction

11. Serial Number

GPM

psi/˚F

4

ft

6

ft

8

10

2. HANDLING

Read these instructions carefully before beginning installation.
Lift and handle these pumps carefully. VPC & VPS series are
vertical multi-stage non-self priming pumps coupled with
standard electric motors. This manual applies to standard ver­sion pumps and for standard applications. Contact your supplier
or the factory for information about special pump versions and
applications.

3. APPLICATIONS

VPC & VPS series in-line pumps booster pumps are designed
for a wide range of applications in various industries – for water
treatment, water boosting, water supply, cooling, cleaning, etc.

3.1 Pumped liquids
The pumps are designed for use with clean, viscous and non­explosive liquids that do not contain abrasive matter.

Vertical Multistage Centrifugal In-line

These pumps are not designed to be used
with abrasive, solid containing, explosive
and corrosive liquids.
For special application, please contact
your supplier or the factory.

4. TECHNICAL DATA

4.1 Temperatures

Ambient temperature: 32 F to +104 F

If ambient temperatures are above +104° F
or if the pump is located at elevations more
than 3,000 feet above sea level, the motor’s
output must be decreased to compensate
for less eective cooling, and may have to
be replaced with a stronger motor.

Liquid temperature: -5 F to +248 F

4.2 Maximum operating pressure

Refer to page 8

4.3 Minimum inlet pressure-NPSH

To avoid cavitation, make sure that there is a minimum pressure
on the suction side of the pump.

NPSHA: Net Positive Suction head Available

The net positive suction head available is a function of the pump
suction system.

NPSHR: Net Positive Suction head required

The net positive suction head required is a function of the pump
design at the operating point on the pump performance curve.

Pumps Spare Parts

VPC-VPS

NPSHA=Ha-Hs-Hf-Hv-Hst (in meters head)

Ha: Barometric pressure. (That can be set to 15 psi.)
Hs: Suction lift.
Hf: Friction loss in suction pipe.
Hv = KT+KH: Vapor pressure
KT: Flow resistance due to liquid temperature.
KH: Flow resistance due to elevation above sea level.

If the liquid is water, you can consult the tables to determine the
values of KT and KH.

T(F) 68 86 104 122 140 158 176 194 212 230 248

KT

0.7 1.3 2.6 4.3 7.2 11 16.4 24 36 49 72

(Ft)

H

0 1640 3280 4921 6461 8202 9842

(Ft)

KH

0 1.80 3.61 5.41 7.22 9.02 10.8

(Ft)

Hst: Safety margin. (minimum: 7 FEET head)

>

NPSHA = NPSHR: Pump running will be fine.
NPSHA < NPSHR: The pump will be dry running or cavitating.

Stop operation of the pump if cavitation
occurs. Cavitation will cause pump damage
and the resultant damage is not subject to
warranty

4.6 Electrical data

See the motor nameplate.

Make sure that the supply voltages, phase
and frequencies correspond to the motor

specications.

4.7 Number of starts per hour

Motors up to and including 5 HP: Maximum 100 times per hour.
Motors of 7.5 HP and up: Maximum 40 times per hour.

If you use another brand of motor then check
the manufacturer’s instructions for the
maximum frequency of starts.

5. INSTALLATION

Always refer to the local or national regulations and codes relat­ing to the selection of the installation site, the water and power
connections, etc.

5.1 Position

Pumps should be installed in a protected environment – not
exposed to weather. Make sure that there are no obstructions to
prevent proper motor cooling.

4.4 Minimum nominal flow rate

To prevent overheating of the internal pump components, the
pump should not be used at flows below the minimum flow
rate.

Do not run the pump against a closed dis­charge valve for longer than a few seconds.

The curve below shows the minimum ow
rate as a percentage of the nominal ow rate

in relation to the liquid temperature.

5.2 Anchoring

The pump must be secured to a solid foundation by bolts
through the holes in the flange or base plate. An illustration of
page 9 shows the bolt location and the pipe connections.

5.3 Installation example

When positioning and installing the pump, follow the installation
examples next page in order to avoid damaging the pump.

Pos. DESCRIPTION

1 Pipe support: Support piping system properly to avoid stresses

on connections.

2 On-off valves: Install on-off valves for easy access- before the

pump intake and after the pump discharge.

3 Use flexible piping on both input and output sides of the pump

to reduce vibration and transmission of noise.

4 Check valves will prevent return flow of pumped liquid when

pump is stopped, reducing the danger of pump damage.

Control Panel: Use high quality components. Make sure that

5

the panel conforms to local standards and regulations.

6 Do not place elbows next to the pump intake and discharge.

If pump needs to be operated with on-off valve closed, install a

7

by-pass line to avoid damaging the pumping system.

13 Size pump for correct head.

Place the intake of the suction pipe so that the intake is always

14

submerged to prevent entry of air.

Install a compound gauge at the pump suction and a pressure

15

gauge at the pump discharge.

6. ELECTRICAL CONNECTION

• All electrical connection should be in accordance with the
local regulations and made by a qualified electrician.

• Make sure that the supply voltages and frequencies, and
phase are suitable for the motor used.

• Before proceeding, make sure that all the connections are
grounded and well insulated.

• Overload protection should be provided.

• To connect, proceed as shown on the inside of the terminal
board cover.

• The terminal box can be turned to four positions.

• Check the direction of rotation (Three-phase motor only).

• Make sure that the controls are properly grounded.

• To avoid the possibility of dry running, we strongly
recommend installing dry running protection.

If it is necessary to increase the diameter of the suction pipe,

8

place an eccentric reducer between the check valve and the
flexible pipe section.

Using elbows will increase the flow resistance. Wide bends will

9

result in lesser flow resistance.

The piping must have a level or positive gradient to prevent the

10

formation of air pockets.

The diameter of the drop pipe must be bigger than the diam-

11

eter of the pump’s suction port.

12 Use a foot valve in case of negative suction head.

7. START-UP

The pump and suction pipe should be filled with the liquid to be
pumped before start-up to prevent dry running at start-up.

Dry running can damage the pump bearing
and shaft seal.

7.1 Operation

• Start the pump and check the direction of rotation of the
motor (Three –Phase motors).

• Start the pump, keeping the on-off valve of the discharge
side of the pump closed. Then, open the on-off valve
slowly. The pump must run smoothly and noiselessly. If
not, then it may be necessary re-prime the pump.

• Check the current drawn of the motor. If necessary, adjust
the setting of the thermal relay.

• Any air pockets trapped inside the pump may be released
by adjusting the air screw.

If the pump is installed in a location where it
is subject to freezing when not in operation,
then the pump and the pipe system should
be drained to prevent damage from freezing.