Nova-Tech LMI Roytronic Series A Metering Pump User Manual

Instruction Manual

®

[e-mail]
www.novatech-usa.com
Tel: [phone] Fax: [phone]
Tel: [phone] Fax: [phone]

Series A

Electronic Metering Pumps

For le reference, please record the following data:

Model No: _____________________________________

Serial No: _____________________________________

Installation Date: ________________________________

Installation Location: _____________________________

When ordering replacement parts for your LMI Metering Pump
or Accessory, please include complete Model Number and
Serial Number of your unit.

Carefully read and understand all precautions before

installing or servicing any metering pump.

201 Ivyland Rd.

Ivyland, PA 18974
TEL: [phone]
FAX: [phone]

www.lmipumps.com

Lit# 2002.A 2/2010

Liquid End

Control Code

Speed (stroking frequency) fixed and stroke length manually
adjustable

Speed (stroking frequency) and stroke length manually
adjustable

External control capability through pulse input and low level float
switch plus manual control adjustments of control code 0

External control capability through pulse input and low
level float switch plus manual control adjustments of control
code 1

External control capability through 4-20 mA input and
low level float switch plus manual control adjustments of
control code 1

See Most Recent Price List for Flow and Pressure Ratings

1 – 110-120V US Plug
2 – 220-240V US Plug
3 – 220-240V DIN Plug
4 – 220-240V Israel Plug
5 – 220-240V UK Plug
6 – 220-240V Aust/NZ Plug
7 – 220-240V Swiss Plug
8 – 110-120V No Plug
9 – 220-240V Indian Plug

7 – Molded Head, Single Ball Check Valves
8 – Molded Head, Double Ball Check Valves
9 – Machined Head, Double Ball Check Valves

1 – 0.2 in

2

2 – 0.4 in

2

3 – 0.8 in

2

4 – 1.6 in

2

See Most Recent Price List for Material Options

S – FastPrime™Head + 4FV
N – FastPrime

™

Head

H – AutoPrime

™

Head + 4FV

A – AutoPrime

™

Head

I – Inch Tubing

M – Metric Tubing

P – 1⁄2” NPT - 1⁄2” BSP Pipe

U – Black, UV Resistant Tubing

Model A 7 5 1 - 8 2 8 S I

Model Code Configuration

Series A

Drive

Not all configurations are available. Please see your local

distributor or price list for available options.

(SS Head only)

®

Contents

1.0 Precautions ................................................................ 4

2.0 Introduction ................................................................. 6

2.1 Specications ........................................................ 6

2

.2 Unpacking Check List ................................................. 7

3

.0 Installation.................................................................. 8

3

.1 Pump Location and Installation........................................... 8

3.2 Pump Mounting....................................................... 8

3

.2.1 Flooded Suction ...................................................... 8

3

.2.2 Suction Lift - Wall Bracket Mount ..........................................9

3

.2.3 Suction Lift - Tank Mount.................................................9

3

.2.4 Suction Lift - Shelf Mount ................................................9

3

.3 Tubing Connections....................................................10

3

.4 Four-Function Valves (4-FV) .............................................11

3

.5 Four-Function Valve Installation...........................................12

3

.6 FastPrime™ .........................................................12

3

.7 AutoPrime™ .........................................................13

3

.8 Foot Valve/Suction Tubing Installation......................................14

3

.9 Injection Check Valve and Discharge Tubing Installation .......................15

4

.0 Operation ..................................................................16

4.

1 Output Adjustment Controls .............................................16

4.

2 Start-up and Adjustment ................................................17

4.2.1 Start-Up/Priming for FastPrime™ Heads ....................................17

4.

2.2 Start-Up/Priming for Pump Supplied with 4-FV...............................18

4.

2.3 Start-Up/Priming Without 4-FV ...........................................18

4.

3 Output Adjustment ....................................................18

4.

3.1 Total Pump Output ....................................................19

4.

3.2 Calibration in Internal Mode .............................................19

4.

3.3 Calibration in External Mode.............................................20

4.

4 Methods of Externally Triggering or Pacing A3, A7, and A8 Pumps................21

4.4.1 Control Modes........................................................22

4.4.1.1 Local Mode ..........................................................22

4.4.1.2 Remote Mode (for A3, and A7) ...........................................22

4.4.1.3 Remote Mode (for A8)..................................................22

4.4.1.4 Calibrating the Analog Input Settings (for A8) ................................23

5.

0 Spare Parts Replacement and Routine Maintenance.................................24

5.

1 Depressurizing the Discharge Line (for Pumps Equipped with a 4-FV Only) ........24

5.

2 Depressurizing The Discharge Line (for Single Ball FastPrime™ Heads Only) .......24

5.

3 Liquifram™ (Diaphragm) Replacement .....................................25

5.

4 Cartridge Valve and O-Ring Replacement ..................................26

5.

5 Injection Check Valve Parts Replacement...................................27

5.

6 FastPrime™ Valve O-Ring Replacement ....................................28

5.7

Stroke Length Setting ..................................................30

5.8

A Drive Parts List .....................................................31

5.9

EPU Wiring Diagram ...................................................32

5.10

Liquid End Parts List ...................................................32

6

.0 Troubleshooting..............................................................37

3

PRECAUTIONS

1.0 PRECAUTIONS

The following precautions should be taken when working with LMI metering pumps.
Please read this section carefully prior to installation.

Protective Clothing

ALWAYS wear protective clothing, face shield, safety glasses and gloves when working
on or near your metering pump. Additional precautions should be taken depending on
the solution being pumped. Refer to MSDS precautions from your solution supplier.

Water Pre-Prime

All LMI pumps are pre-primed with water when shipped from the factory. If your solu­tion is not compatible with water, disassemble the Pump Head Assembly. Thoroughly
dry the pump head, valves, seal rings, balls and Liquifram
head assembly tightening screws in a crisscross pattern. Rell the pump head with the
solution to be pumped before priming the pump. (This will aid in priming.)

Liquid Compatibility

CAUTION: The evaluation performed by UL was tested with water only. LMI pumps
are tested by NSF for use on muriatic acid and sodium hypochlorite. Determine if the
materials of construction included in the liquid handling portion of your pump are ad­equate for the solution (chemical) to be pumped. Always refer to the solution supplier
and the LMI Chemical Resistance Chart for compatibility of your specic LMI metering
pump. Contact your local LMI distributor for further information.

™

(diaphragm). Reassemble

Tubing Connections

Inlet and outlet tubing or pipe sizes must not be reduced. Outlet tubing size must not be
increased. Make certain that all tubing is SECURELY ATTACHED to ttings prior to
start-up (see Section 3.3, Tubing Connections). ALWAYS use LMI supplied tubing with
your pump, as the tubing is specically designed for use with the pump ttings. It is rec­ommended that all tubing be shielded and secure to prevent possible injury in case of
rupture or accidental damage. If tubing is exposed to sunlight, black UV resistant tubing
should be installed. Check tubing frequently for cracks and replace as necessary.

Vinyl Tubing

Your carton may contain a roll of clear vinyl tubing; this is only for connection to the
return line of the FastPrime

Fittings and Machine Threads

All ttings should be hand-tightened. An additional 1/8 - 1/4 turn after the tting is snug
may be necessary to provide a leak-proof seal. Excessive overtightening or use of a pipe
wrench can cause damage to the ttings, seals, or pump head.

All LMI pumps have straight screw machine threads on the head and ttings and are
sealed by the O-rings. DO NOT use Teon

may only be used on the 1/2" NPT thread side of the Injection Check Valve, the stainless
steel liquid end connections, or if piping is directly connected to the pipe threads of the suc­tion or discharge ttings.

4

™

Head and must not be used as discharge tubing.

®

tape or pipe dope to seal threads. Teon® Tape

Plumbing

Always adhere to your local plumbing codes and requirements. Be sure installation does
not constitute a cross connection. Check local plumbing codes for guidelines. LMI is not
responsible for improper installations.

Back Pressure/Anti-Syphon Valve

If you are pumping downhill or into low or no system pressure, a back pressure/anti­syphon device such as LMI’s Four-Function Valve should be installed to prevent over­pumping or syphoning. Contact your LMI distributor for furthur information.

Electrical Connections

WARNING: To reduce the risk of electrical shock, the metering pump must be plugged
into a properly grounded grounding-type receptacle with ratings conforming to the data
on the pump control panel. The pump must be connected to a good ground. Do not use
adapters! All wiring must conform to local electrical codes. If the supply cord is damaged,
it must be replaced by the manufacturer, stocking distributor, or authorized repair center
in order to avoid a hazard.

PRECAUTIONS

Ground Fault Circuit Interrupter

WARNING: To reduce the risk of electric shock, install only on a circuit protected by a
Ground Fault Circuit Interrupter (GFCI).

Line Depressurization

To reduce the risk of chemical splash during disassembly or maintenance, all installations
should be equipped with line depressurization capability. Using LMI’s Four-Function
Valve (4-FV) is one way to include this feature.

Over Pressure Protection

To ensure safe operation of the pump it is recommended that some type of safety/pressure­relief valve be installed to protect the piping and other system components from failing
due to excessive pressure.

Chemical Concentration

There is a potential for elevated chemical concentration during periods of no ow, for
example, during backwash in the system. Steps, such as turning the pump off, should be
taken during operation or installation to prevent this.

See your distributor about other external control options to help mitigate this risk.

Retightening Components

Plastic materials will typically exhibit creep characteristics when under pressure over a
period of time and to insure a proper t it may be necessary to retighten the head bolts
periodically. To insure proper operation, we recommend tightening the bolts to 25 inch­pounds after the rst week of operation and on a monthly basis thereafter.

5

INTRODUCTION

2.0 Introduction

LMI is the world’s most versatile manufacturer of economical and efcient metering
pumps. This manual addresses the installation, maintenance and troubleshooting proce­dures for manually and externally controlled pumps. LMI has a worldwide network of
stocking representatives and authorized repair centers to give you prompt and efcient
service.

Please review this manual carefully. Pay particular attention to warnings and precautions.
Always follow good safety procedures, including the use of proper clothing, eye and face
protection.

This manual is for Roytronic

2.1 Specications

Operating
Temperature

Voltage 110 to 120 V 220 to 240 V

Frequency 50 to 60 Hz 50 to 60 Hz

Max. Current 0.66 A 0.34 A

Wattage 39 W 42 W

Fuse Specication 1.25 AHT (5 x 20 mm) 1.25 AHT (5 x 20 mm)

®

Series A pumps.

AXX1, AXX8 AXX2-AXX7, AXX9

14 to 113°F
–10 to 45°C

14 to 113°F
–10 to 45°C

6

2.2 Unpacking Check List

Your carton will contain many or all of the following items. Please notify the carrier
immediately if there are any signs of damage to the pump or its parts.

UNPACKING CHECK LIST

Metering Pump

Ceramic Foot Valve

Weight

Foot Valve

Injection Check

Valve

Tubing (0 to 3 Rolls)

Four-Function Valve

(Optional)

Low-Level Sensor

(Optional)

External Control
Cable (Optional)

Tube Connection

Hardware

7

INSTALLATION

3.0 Installation

3.1 Pump Location and Installation

Locate pump in an area convenient to solution tank and electrical supply.

The pump should be accessible for routine maintenance, and should not be operated in
ambient temperatures above 113°F (45°C). If the pump will be exposed to direct sunlight,
LMI black, UV resistant tubing should be installed.

This pump is cord connected and not intended for permanent mounting to a building.
However, temporary mounting to stabilize the pump during operation may be necessary
as long as tools are not required for the installation or removal of the pump.

3.2 Pump Mounting

The pump can be mounted in one of two ways:

A. FLOODED SUCTION (ideal installation); or

SUCTION LIFT - when suction lift is less than 5 feet (1.5 m) for solutions having a

B.

specic gravity of water or viscosity of less than 100 cSt (centistokes). For denser or
more viscous solutions, consult distributor.

Note that suction conditions can affect the performance of the pump. This effect is
more pronounced with lower pressure pumps. Consult your distributor for additional
information.

Your LMI metering pump must be mounted so that the suction and discharge valves
are vertical. NEVER position pump head and ttings horizontally.

3.2.1 Flooded Suction

For ooded suction the pump is mounted at the base of the storage tank. This installation
is the most trouble-free, and is recommended for very low outputs, solutions that gasify,
and high-viscosity solutions. Since the suction tubing is lled with solution, priming is
accomplished quickly and the chance of losing prime is reduced. A foot valve is not
necessary in a ooded suction installation.

When pumping downhill or into low or no pressure system, a back pressure/anti-syphon
device should be installed to prevent overpumping or syphoning.

Although popular for all solutions, LMI recommends ooded suction installations for
all high-viscosity uid applications.

INCORRECT

Avoid this type of false ooded suction.

8

CORRECT

3.2.2 Suction Lift - Wall Bracket Mount

The pump may be mounted using an LMI Wall Mount Bracket Assembly (part no. 34643)
directly above the solution tank. A pump mounted in this manner allows for easy chang­ing of solution tanks or drums.

3.2.3 Suction Lift - Tank Mount

The pump may be mounted on a molded tank provided there is a recess to keep the pump
stationary. LMI 10-gallon tank (part no. 27421), 35-gallon tank (part no. 27400), and
50-gallon tank (part no. 26350) have molded recesses for pump mounting.

3.2.4 Suction Lift - Shelf Mount

The pump may be mounted on a shelf (customer supplied) maintaining a suction lift of
less than 5 ft (1.5 m). An LMI mounting kit (part number 10461) is available for securing
the pump to a shelf.

INSTALLATION

9

INSTALLATION

3.3 Tubing Connections

Use only LMI tubing.

DO NOT USE CLEAR VINYL TUBING ON THE DISCHARGE SIDE OF THE

PUMP. The pressure created by the pump can rupture vinyl tubing, which is only for
connection to the return line of the FastPrime

Before installation, all tubing must be cut with a clean square end.

Valve and head connections from the factory are capped or plugged to retain pre-prime

water. Remove and discard these caps or plugs before connecting tubing.

DO NOT USE PLIERS OR PIPE WRENCH ON COUPLING NUTS OR FITTINGS.

To assemble tubing into the ttings:

1. Put coupling nut over tubing.

2. Press on Ferrule – Female about one inch (25 mm).

3. For 1⁄4" or 6mm OD tubing cut tubing so that only 1⁄4" to 3⁄8" (5-10 mm) protrudes
from the Ferrule. For all other tubing push the tube to the bottom of the groove in the
Ferrule – Male.

™

tting.

Replacement
Ferrules, and

Coupling Nuts

are available as

the following kit

numbers:

¼” Tube – 77382

3

8

⁄

” Tube – 77383

½” Tube – 77384

One kit is needed

for each end of

the tube.

4. Firmly hand tighten the coupling nut onto the tting. Tightening with pliers may cause
the ferrules to break.

Coupling Nut

Ferrule - Female

Ferrule - Female

" Tubing

4

⁄

1

" Tubing

8

⁄

3

" Tubing

2

⁄

1

Ferrule - Male

10

Fitting

3.4 Four-Function Valves (4-FV)

Your pump may be equipped with a 4-FV, or standard discharge valve. If your pump is
not equipped with a four-function valve and you feel it is needed in your application, it
can be purchased as an accessory. Contact your local LMI stocking distributor. The
features of a 4-FV are listed below.

1. Pressure Relief: If the discharge line is over pressurized, the valve opens sending solu­tion back to the supply tank.

2. Line Depressurization: Opening the relief knob provides line drain back to the supply
tank.

3. Anti-Syphon: Prevents syphoning when pumping solution downhill or into a vacuum.

4. Back Pressure: Supplies approximately 25 psi back pressure to prevent overpumping

when little or no system back pressure is present.

INSTALLATION

4-FV prevents syphoning when

pumping downhill into

low or no pressure.

Typical Installations Requiring the Anti-Syphon

4-FV prevents syphoning when
pumping into a vacuum such as the
suction side of a recirculating pump.

Feature of a Four-Function Valve

11

INSTALLATION

3.5 Four-Function Valve Installation

Discharge

1/4"

Through

1/4" Tubing

Four-Function

Bleed Nut

4-FV Fitting

To Solution

Tank or Drum

Coupling Nut

To Pump Head

Four-Function Valve Tubing Connection

This return line tubing must be secured to ensure pumped solution will safely return to supply
tank.

3.6 FastPrime™

Valve Body

To install a 4-FV, the 4-FV Fitting and Coupling Nut should be
assembled with the appropriate cartridges into the discharge port
of the pump. Use a 13/16” or 20 mm socket to tighten tting. Tight­ening to 50 inch-pounds is recommended. Do not over tighten.

To assemble the Four-Function Valve Body, assemble the coupling
nut and the threads at the bottom of the body. Firmly hand tighten
the body in the desired orientation. Next, insert the ¼” tubing
through the Bleed Nut. Ensure that about ¼” (6 mm) of tubing is
protruding through the tip of the Bleed Nut. Firmly hand tighten
the Bleed Nut in the hole on the side of the 4-FV. This tubing should
be routed back to the supply tank. To ensure proper function of the
priming function, the end of this tubing should not be submerged
in the solution..

The FastPrime™ Head is equipped with a valve that allows for opening the head to at-

™

mospheric pressure. When installing a pump equipped with a FastPrime

Head connect
the 3/8" outer diameter clear vinyl tubing provided with the pump to the barbed nozzle.
Route the vinyl return line back to the solution tank. This tubing must not be submerged
in the solution.

FastPrimeTM Valve

3/8" Clear Vinyl Tubing

12

FastPrime™ Head

3.7 AutoPrime™

INSTALLATION

The AutoPrime™ Liquid End is equipped with a valve that allows for constant removal
of vapors and gasses inherent with effervescent chemicals such as Sodium Hypochlorite
and Hydrogen Peroxide. The valve keeps the pump primed automatically. When install­ing a pump equipped with an AutoPrime™ Liquid End connect the 1/2" OD Polyethylene
tubing to the top vertical tting, and route this line back to the supply tank. To ensure
priming, this tubing should not be submerged in the solution. The horizontal tting is
the discharge, and the bottom vertical tting is the suction.

Return Fitting
Using 1/2" polyethylene
tubing here and
route to supply tank.

Discharge Fitting

Suction Fitting

13

INSTALLATION

3.8 Foot Valve/Suction Tubing Installation

The Foot Valve acts as a check valve to keep the pump primed in suction lift applications.

The foot valve is designed to be submersed in the solution tank or drum and must sit in
a vertical position at the bottom. Position approximately 2 inches (50 mm) off the bottom
if the tank or drum contains sediment.

Pump models

equipped with

high-viscosity

liquid ends are

not equipped

with foot valves.

Flooded suction

is recommended.

A 1/2" NPT
connector is
included for

flooded suction

installations.

The ceramic weight, when installed, helps position the foot valve in a vertical position.

1. Attach the foot valve to one end of the suction tubing (see Tubing Connections, Sec­tion 3.3).

2. Slide the ceramic weight over the tubing end until it contacts the top of the foot valve
coupling nut.

3. Place foot valve and tubing into the solution tank. Check that the foot valve is vertical
and approximately 2 inches (50 mm) from the bottom of the tank or drum (see illus­tration). Connect the other end of the tubing to the suction side of the pump head
(bottom side) (see Tubing Connections, Section 3.3).

14

Tilted Sideways WILL NOT PRIME

Foot Valve

INCORRECT

Return Lines

Must Not Be

Submerged

Use Ceramic

Weight

2.0 in. (50 mm)

for Sediment Accumulation

Foot Valve Must
Remain Vertical

CORRECT

3.9 Injection Check Valve and Discharge Tubing Installation

The Injection Check Valve prevents backow from a treated line. Install the injection
check valve at the location where chemical is being injected into the system. Any size
NPTF tting or pipe tee with a reducing bushing to 1/2" NPTF will accept the injection
check valve. Teon

When installing the Injection Check Valve, be sure to position it so that the valve enters
the bottom of your pipe in a vertical position. Variations left and right within 80° are
acceptable (see illustration).

After cutting an appropriate length of tubing, connect tubing to the injection check valve
then back to the discharge side of the pump head. Make sure it does not crimp or come
into contact with hot or sharp surfaces (see Tubing Connections, Section 3.3).

Pipe Cross

Section

®

tape should only be used on threads that are connected with pipes.

INSTALLATION

40°

Variation

Acceptable

Injection

Check Valve

Flow

40°

Variation

Acceptable

CORRECT

Use Teon

Tape here on

Pipe threads only

Do NOT use

Teon tape

On machined

Threads

Typical Injection Check Valve Installations

1" Pipe Tee

Reducing

Bushing

1" to 1/2" NPT

(Customer Supplied)

Injection

Check Valve

Flow

15

OPERATION

4.0 Operation

4.1 Output Adjustment Controls

1. Power/Mode Selection Button: This button allows convenient starting
and stopping of the pump. For pumps with external control capability
(A3, A7, A8) this button switches pump operation between internal and
external modes. When operating in internal mode the Pulse Indicator
Light will ash green. When operating in external mode the Pulse Indica­tor Light will ash yellow.

➂

Speed Adjustment Knob: This knob provides adjustment of the stroking

2.

speed. For pumps with this knob (A1, A7, A8) turning this knob clockwise

➀

P increases stroke frequency (speed) from a minimum of 1 stroke per
minute.

➃

➄

➆

➂ ➀

➃

Stroke Adjustment Knob: This knob provides adjustment of the stroke

3.

➁

➅

length. Turning this knob clockwise P increases the stroke length, which
results in a higher amount of chemical displaced per stroke. It is recom­mended that the stroke range stay between 20% and 100%.

Pulse Indicator Light: This light will ash green when pumping in internal

4.

mode, and will ash yellow when pumping in external mode. The light is
on between strokes and off during the actual stroke.

Low-Level Indicator Light: This light will turn red when a Low-Level

5.

Sensor registers a low chemical level. This will turn off the pump. You
must have a Low-Level Sensor connected to the pump through the Low­Level Connector for this function to operate.

Low-Level Connector (3-Pin): This connector is for the connection of a

6.

Low-Level Sensor (48413). The low-level switch input connections are
always active for all models in all functional modes. If the uid level drops
below the level specied by the Low-Level Sensor, the pump will stop and
the Low-Level Indicator Light will turn on. The pump is designed to
recognize an open circuit as full, and a closed circuit as empty. The pin
functions are as follows:

1. Low Level Signal

3. No Connection

4. Ground/Return Connection

16

OPERATION

DETAIL D

SCALE 5 : 1

➂

➄

➁

➃

7. External Control Connector (5-Pin): This connector is for the connection of various
options and accessories that can be used to externally control the pump. The pin func­tions (and the wire color for the standard LMI external control cable) are as follows:

1. Remote On Signal (Brown)

➀

2. Ground/Return Connection (White)

3. External Pulse Signal (Blue) (used only with A3, and A7 Series pumps)

4. 18Volt Supply Voltage (Black)

5. 4-20mA Input Signal (Green/Yellow) (used only with A8 Series pumps).

Some of the accessories available for use with A3, and A7 Series metering pumps are
listed below. Note that an Adapter Cable (48488) is needed when connecting any of the
MICROPACE(TM) units or owmeters.

A. MICROPACE™ A/D Converter (MP-100) - for translating a 4-20 milliamp signal

into an analog signal.

B. MICROPACE™ Divider (MP-400D) - for reducing the frequency of high frequency

pulses.

C. MICROPACE™ Multiplier (MP-500M) - for increasing the frequency of low

frequency pulses.

D. Pulse Transmitter (48489) - for pulsing in time with another LMI Electronic

Metering Pump.

E. RFP Flowmeter and Programmable Divider - for pacing the stroke frequency off

of the system ow.

F. FC Flowmeter/Contactor - for pacing the stroke frequency off of the system ow.

4.2 Start-up and Adjustment

• The pump is normally self-priming if suction lift is 5 ft (1.5m) or less and the steps below

are followed.

• Pumps are shipped from the factory with water in the pump head to aid in priming.

4.2.1 Start-Up/Priming for FastPrime™ Heads

Read this entire section completely before proceeding.

When all precautionary steps have been taken, the pump is mounted, and the tubing is
securely attached, you may now start priming the pump.

Plug in or switch the pump on.

1.

2. While the pump is running, set the Speed Adjustment Knob and the Stroke Adjust-

ment Knob at 100%.

3.

Turn The FastPrime™ knob 1 to 2 turns counter-clockwise Q.

The suction tubing should begin to ll with solution from the tank.

4.

5. A small amount of solution will begin to discharge out the return line of the FastPrime™
valve. Once this happens, turn the knob clockwise P until hand tight and SHUT THE
PUMP OFF.

6.

The pump is now primed.

7. Proceed to output adjustment, Section 4.3.

17

OPERATION

4.2.2 Start-Up/Priming for Pump Supplied with 4-FV

Read this entire section completely before proceeding.

When all precautionary steps have been taken, the pump is mounted, and the tubing is
securely attached, you may now start priming the pump.

If the pump does

not self-prime,

remove the 4-FV

on the discharge

side of the pump

head. Remove

the check valve

and pour water

or solution into

the port until the

head is filled.

Replace valve,

then follow start

up/priming steps.

Plug in or switch the pump on.

1.

2. While the pump is running, set the Speed Adjustment Knob and the Stroke Adjust-

ment Knob at 100%.

3. Open the relief side (black knob) of the 4-FV by turning to the stop (about 1/8 turn).

The suction tubing should begin to ll with solution from the tank.

4.

5. A small amount of solution will begin to discharge out the return line of the 4-FV.

Once this happens, return the knob to the 12:00 position and SHUT THE PUMP OFF.

The pump is now primed.

6.

7. Proceed to output adjustment, Section 4.3.

4.2.3 Start-Up/Priming Without 4-FV

If the pump does

not self-prime,

remove the

discharge check

valve and pour

water or solution

into the port until

the head is filled.

Replace valve,

then follow start

up/priming steps.

Read this entire section completely before proceeding.

When all precautionary steps have been taken, the pump is mounted, and the tubing is
securely attached, you may prime the pump.

1. Plug in or switch on the pump.

2. While the pump is running, set the speed knob and the stroke knob at 100%.

3. The suction tubing should begin to ll with solution from the tank.

4. Once the solution begins to exit the pump head on the discharge side, SHUT THE
PUMP OFF.

The pump is now primed.

5.

6. Proceed to output adjustment, Section 4.3.

4.3 Output Adjustment

Once the pump has been primed, an appropriate output adjustment MUST be made.
Pump output should be calculated and adjustments made accordingly.

18

4.3.1 Total Pump Output

Calculate the approximate output of the pump as follows:

OPERATION

When converting

between different

units, remember

these conversion

factors:

1 Gallon =

3.785 Liters

1 Day =

1,440 Minutes

240 SPM =

14,400 SPH

PUMP OUTPUT = MAX PUMP OUTPUT x % SPEED x % STROKE

Example: A151-928SI

Use Max Output (from dataplate on side of pump) = 1 GPH (1 gallon per hour).

If the pump is set at 60% speed and 70% stroke length, the approximate pump out­put is:

1.0 x 0.60 x 0.70 = 0.42 GPH.

Multiply by 24 (hours in one day) to calculate in gallons per day. If pump is not equipped
with speed adjustment, calculate by Max Pump Output x % Stroke only.

4.3.2 Calibration in Internal Mode

Once installation is complete and the approximate output has been determined,
the pump should be calibrated to adjust speed and stroke for your actual desired
output. (Calibration cylinders may be purchased from your local LMI distributor,
ref. publication 1798.)

Be sure the pump is primed, and discharge tubing and Injection Check Valve

1.

are installed as they would be in normal service (i.e., including factors such as
injection pressure, uid viscosity, and suction lift).

Place the Foot Valve in a graduated container with a volume of 1000 ml or

2.

more.

3. Plug in and switch pump to Internal Mode. Pump until all the air is exhausted
from the suction line and head.

4. Turn the pump off. Rell graduated container to a level starting point.

5. Using a stopwatch or timer, turn the pump on for a measured amount of time

(120 pump strokes minimum). The longer the time period, the more condent
you can be of the results. Be sure to count the number of strokes during the
calibration period when making comparisons.

Turn the pump off. Note the time elapsed in relation to volume displaced in

6.

the graduate. Now, calculate the output in the time unit you choose (minutes,
hours, days, etc.).

If the output is too low or too great, use the Stroke Adjustment Knob and/or

7.

the Speed Adjustment Knob to ne-tune the amount of ow, estimating re­quired correction and repeat steps 1-7.

19

OPERATION

4.3.3 Calibration in External Mode

1. Since pump output is governed by an external device such as Flowmeter-Pulser,
Liquitron™ Controller, or 4-20 mA DC signal from an instrument with an LMI

It may be helpful

to decrease
the speed of
the pump in

order to count

the number

of strokes. For

accuracy count at

least 120 strokes.

Analog-to-Digital Converter, only the output per stroke may be calibrated.

With pump primed and discharge tubing connected to the injection point as it would

2.

be in normal service, place Foot Valve Assembly in a graduated container with a vol­ume of 1000 ml or more.

. Switch pump to Internal mode with Speed Adjustment Knob set at 100% until air is

3

exhausted from suction line and pump head.

. Switch pump OFF and rell graduate to a starting point.

4

5. Switch pump ON and count the number of strokes for exactly one minute, then switch

pump OFF.

. Note volume pumped during the calibration period of one minute. Divide into this

6

the number of strokes to determine the volume of solution pumped per stroke.

Example: 720 ml in 240 strokes = 3.0 ml per stroke.

Multiply this by your expected stroke rate per minute, per hour or per day and compare

with desired output requirements.

7. Turn Stroke Adjustment Knob to your best estimate of required correction and repeat
calibration procedure.

20

4.4 Methods of Externally Triggering or Pacing A3, A7, and A8 Pumps

Full (Open)

Empty (Closed)

4-20 milliamp DC

4-20 milliamp DC

Higher Frequency Pulses

Lower Frequency Pulses

Pulse

Transmitter

MICROPACE

™

4DIGIT DIVIDER

MP-400D

MICROPACE

™

A/D CONVERTER

MP-100

MICROPACE

™

4DIGIT MULT IPLIER

MP-500M

RFP Flowmeter

Programmable

Divider

Programmable

Divider

FC Flowmeter/Contactor

A3, A7, A8

A3, A7

A8

Optional

Low Level

Sensor

Method of Triggering A3, and A7 Pumps Through External Control Connector

OPERATION

1. Switch Closure
Switch closing
triggers pump

2. NPN Transistor
Base goes high
to trigger pump

3. PNP Transistor
Base goes low
to trigger pump

4. Opto

Isolator

The default configuration

for the Remote On/Off

input is: open contacts

= pump stopped, closed

contacts = pump enabled.

Therefore pins 1 and 2
of the External Control

Connector must be shorted

together in external mode

for the pump to respond to

external signals.

Blue

PIN

White

+ Blue

− White

Switch or transistors must be capable of switching 24V DC at

3

15 milliamperes. Minimum time in low impedance state (

2

25 milliseconds. Minimum time in high impedance state (
is 50 milliseconds.

3

2

NOTE: Pins 1 (Brown wire) and 2 (White wire) must be connected/

ON) is

OFF)

shorted together in order for the pump to be ‘ON’ in external

+ Blue

− White

+ Blue

− White

3

mode.

2

3

2

These pumps have two operating modes: Local (Pulse Indicator Light ashes
green) and Remote (Pulse Indicator Light ashes yellow). Pressing the Power/
Mode Selection Button switches between Local and Remote modes. The default
conguration for operating mode is Local mode.

When the pump is in Local mode the Remote On/Off input is ignored. When the
pump is in Remote mode the Remote On/Off input is always monitored. The
pump will return to the last power mode if power is interrupted.

21

OPERATION

4.4.1 Control Modes

4.4.1.1 Local Mode

• WheninLocalmodetheA3pumprunscontinuouslyatmaximumspeed.

• When in Local mode A7 and A8 pumps run atthe speed indicated by the speed

knob.

4.4.1.2 Remote Mode (for A3, and A7)

The default

definition of a

pulse is: close =

pulse starts, open

= pulse ends.

Pins 1 (brown wire) and 2 (white wire) must be connected/shorted together in order for
the pump to respond to pulses in external mode.

• InRemotemodepulsesoccurringfasterthanarateof1200pulsesperminute(less

than 50ms apart) and pulses with a duration of less than 25ms are ignored.

• Pulsesoccurringbetween240strokesperminute(SPM)and1200pulsesperminute

results in the pump running at 240 SPM.

• Pulsesoccurringatlessthan240SPMresultsinthepumpstrokingatthatrate.

4.4.1.3 Remote Mode (for A8)

Pins 1 (brown wire) and 2 (white wire) must be connected/shorted together in order for
the pump to respond to a milliamp signal.

In Remote mode the pump speed is controlled by a milliamp (mA) Analog Input signal.
The factory default settings for the Analog Input are: 20mA input = maximum speed,
4 mA = 0 strokes per minute. The mA input setting can be calibrated to any level between
0 – 22 mA. When recalibrating the input settings, the span between high and low input
must be greater than 6 mA. If the span is not large enough, the Pulse Indicator Light will
ash green and yellow alternately at about 10 times per second.

In the default settings, the fast level mA input is greater than the slow level mA input.
This is known as direct action. In direct action when the mA input is at or above the set­ting for the fast level, the pump will run at maximum speed. When the mA input is below
the setting for the slow level, the pump will stop.

22

Reverse action is when the slow level mA input is greater than the fast level mA input. In
reverse action when the mA input is at or below the setting for the fast level, the pump
will run at maximum speed. When the mA input is above the setting for the slow level,
the pump will stop.

4.4.1.4 Calibrating the Analog Input Settings (for A8)

1. Press and hold the Power/Mode Selection Button for more than 5 seconds. This enters
the calibration mode. Pumping will stop while in calibration mode.

2. Turn the Speed Adjustment Knob completely clockwise P to enter the fast level analog
input state. The Pulse Indicator Light will ash 1 second green ¼ second yellow.

3. Apply the desired fast level analog signal and press the Power/Mode Selection Button
for less than 3 seconds. The Pulse Indicator Light will be green for 1 second before
resuming ashing to conrm storage of the setting.

4. Turn the Speed Adjustment Knob completely counter-clockwise Q to enter the slow
level analog input state. The Pulse Indicator Light will ash 1 second yellow ¼ second
green.

5. Apply the desired slow level analog signal and press the Power/Mode Selection Button
for less than 3 seconds. The Pulse Indicator Light will be yellow for 1 second before
resuming ashing to conrm storage of the setting.

6. To return the pump to the factory default settings turn the Speed Adjustment Knob
to 50%. The Pulse Indicator Light should ash 1 second green, 1 second yellow. Then
press the Power/Mode Selection Button.

OPERATION

7. To exit calibration mode press and hold the Power/Mode Selection Button for more
than 3 seconds.

23

MAINTENANCE

5.0 Spare Parts Replacement and Routine Maintenance

LMI recommends replacing the elastomeric components of the pump on an annual basis.
Refer to the LMI Metering Pump Price List for the proper Spare Parts Kit or RPM Pro

™

kit number or contact your local LMI stocking distributor.

Pac

5.1 Depressurizing the Discharge Line
(for Pumps Equipped with a 4-FV Only)

ALWAYS wear protective clothing, face shield, safety glasses and gloves when performing
any maintenance or replacement on your pump.

To reduce the risk of chemical splash during disassembly or maintenance, all installations
should be equipped with line depressurization capability. Using LMI’s Four-Function Valve
(4-FV) is one way to include this feature.

Read steps 1 and 2 below before proceeding.

. Be sure the Injection Check Valve is properly installed and is operating. If a shut off

1

valve has been installed downstream of the Injection Valve, it should be closed.

Be sure your relief tubing is connected to your 4-FV and runs back to your solution drum
or tank.

. Turn the black knob on the 4-FV 1/8 turn to the stop. Turn and hold the yellow knob

2

for a few seconds. The discharge line is now depressurized. Keep both valve knobs
open until solution drains back down the discharge tubing into the solution tank or
drum. Then release the yellow knob, and turn the black knob to its normal position.

5.2 Depressurizing the Discharge Line
(for Single-Ball FastPrime™ Heads Only)

ALWAYS wear protective clothing, face shield, safety glasses and gloves when performing
any maintenance or replacement on your pump.

Read steps 1 and 2 below before proceeding.

1. Be sure the Injection Check Valve is properly installed and is operating. If a shut off
valve has been installed downstream of the Injection Valve, it should be closed.

Be sure your relief tubing is connected to your FastPrime
tion drum or tank.

™

2. Turn the FastPrime
line is now depressurized. Keep valve open until solution drains back down the dis­charge tubing into solution drum or tank. Then turn the knob clockwise P to tighten
knob to closed position.

knob one-and-a-half turns counter-clockwise Q. The discharge

™

valve and runs back to your solu-

24

5.3 Liquifram™ (Diaphragm) Replacement

ALWAYS wear protective clothing, face shield, safety glasses and gloves when working near
or performing any maintenance or replacement on your pump. See MSDS information from
solution supplier for additional precautions.

LMI metering pumps are designed for trouble-free operation, yet routine maintenance
of elastomeric parts is essential for optimum performance. This involves replacing the
Liquifram
spring. LMI recommends replacing these parts at least once a year; however, frequency
will depend on your particular application.

When replacing the Liquifram
spring should also be replaced (see next Section 5.4). A Spare Parts Kit or RPM Pro Pac
kit containing these parts may be obtained from your local distributor.

™

, cartridge valves, O-rings, 4-FV cap assemblies and the injection check valve

™

MAINTENANCE

, the cartridge valves, or O-rings, the injection check valve

Replacing the Liquifram

™

:

1. Carefully depressurize, drain, and disconnect the

discharge line (see previous sections in this
manual).

™

Head

Liquifram

2. Place the Foot Valve into a container of water or
other neutralizing solution. Turn the pump on to
ush the head assembly. Once the pump head has
been ushed, lift the Foot Valve out of the solution
and continue to pump air into the pump head until
the pump head is purged of water or neutralizing
solution.

™

Adapter Disk

Shaft

Seal

If the liquid cannot be pumped due to Liquifram

Drive

carefully disconnect the suction and discharge tubing
using protective clothing, gloves and face shield. Remove
the four screws and washers from the head and immerse
the head in water or other neutralizing solution.

3. Start the pump. While running, set the Stroke Adjustment Knob to 0% and turn the
pump off.

4. With the unit off, unscrew the Liquifram™ by carefully grasping the outer edge and

™

turning it counter-clockwise Q. Discard old Liquifram

™

(located behind the Liquifram

) and ensure that the diameter of the raised section is

the same as the diameter of the replacement Liquifram

. Remove the Adapter Disk

™

.

5. Remove Adapter Disk and check condition of the Shaft Seal. Replace Shaft Seal if

necessary.

6

. Replace the Adapter Disk so that the drain hole of the disk is oriented downward,

and the mounting holes line up with the mounting holes of the pump.

Be careful not to scratch the Teon

®

face of the new Liquifram™.

™

rupture,

7

. Screw on the new Liquifram™ clockwise P until turned all the way in. Start the pump

and turn the stroke knob to 100%. Stop the pump.

8. Remount the pump head using the four (4) screws and washers. Tighten in a criss-cross

pattern. After one week of operation, recheck the screws and tighten if necessary.

25

MAINTENANCE

5.4 Cartridge Valve and O-ring Replacement

ALWAYS wear protective clothing, face shield, safety glasses and gloves when working on
or performing any maintenance or replacement on your pump. See MSDS information from
solution supplier for additional precautions.

Refer to the LMI Metering Pump Price List for the proper Spare Parts Kit or RPM Pro

™

kit number or contact your local LMI stocking distributor.

Pac

1. Carefully depressurize and disconnect the discharge line (see Section 5.1 or 5.2 in this

manual).

2. Place the Foot Valve into a container of water or other neutralizing solution. Turn the

pump on to ush the head assembly. Once the pump has been ushed, lift the Foot
Valve out and continue to pump to let air into the pump head until pump is purged
of water or neutralizing solution.

If the liquid cannot be pumped due to Liquifram
and discharge tubing using protective clothing, gloves and face shield. Remove the four screws
and washers from the head and immerse the head in water or other neutralizing solution.

Spare part replacement kits include specic instructions for valve replacement. Please
follow the instructions included with the replacement kit.

™

rupture, carefully disconnect the suction

Carefully disconnect one tubing connection and tting at a time, then remove and

3.

replace the worn valve and O-rings. If necessary, carefully loosen stuck valves by pry­ing side to side using a small screwdriver through the center hole of the valve.

Before disassembling the check valves, note the orientation of the valve.

Install new check valves in each location. Ensure that the cartridges are oriented

4.

correctly.

26

5.5 Injection Check Valve Parts Replacement

Depressurize and drain pipeline (or isolate Injection Check Valve point using valves) so that
Injection Check Valve can safely be disassembled.

ALWAYS wear protective clothing, face shield, safety glasses and gloves when working near
or performing any maintenance or replacement on your pump. See MSDS information from
solution supplier for additional precautions.

Refer to the LMI Metering Pump Price List for the proper Spare Parts Kit or RPM Pro

™

kit number or contact your local LMI stocking distributor.

Pac

1. Isolate Injection Check Valve and depressurize pipe or drain pipeline.

2. Carefully depressurize and disconnect the discharge line (see Section 5.1 or 5.2 in this

manual).

Spare part replacement kits include specic instructions for valve replacement. Please
follow the instructions included with the replacement kit.

Carefully disconnect the tubing leading to the Injection Check Valve, then remove the

3.

Injection Check Valve Fitting. Remove and replace the worn spring, seat, ball, and
O-ring.

MAINTENANCE

Before disassembling the check valve, note the orientation of the parts.

Install a new spring, seat, ball, and O-ring. Ensure that the parts are oriented

4.

correctly.

O-Ring

Injection Check

Valve Fitting

Spring

Ball

Seat

O-Ring

27

MAINTENANCE

5.6 FastPrime™ Valve O-Ring Replacement

ALWAYS wear protective clothing, face shield, safety glasses and gloves when performing
any maintenance or replacement on your pump.

Refer to the LMI Metering Pump Price List for the proper Spare Parts Kit or RPM Pro

™

kit number or contact your local LMI stocking distributor.

Pac

1. Be sure the Injection Check Valve is properly installed and is operating. If a shut off

valve has been installed downstream of the Injection Valve, it should be closed.

Be sure your relief tubing is connected to your FastPrime™ valve and runs back to your solu­tion drum or tank.

Turn the FastPrime™ Knob one-and-a-half turns counter-clockwise Q. This will de-

2.

pressurize the head. Keep valve open. Carefully remove the return line by gently pulling
tubing and moving it from side to side to gradually back tubing off of the barbed
tting.

Hold return line tubing upright until solution drains back into solution drum or

3.

tank.

4. Using a 3/4" (or 19mm) socket or wrench remove Retaining Nut, and pull out the

entire FastPrime™ Valve assembly. Remove and replace the two small O-rings.

5. Reinsert the FastPrime™ Valve assembly and retighten the Retaining Nut. Then turn

™

the FastPrime

Knob clockwise P to tighten knob to closed position. To avoid dam-

aging the parts, it is important that the ange on the FastPrime™ Valve is ush with
the Retaining Nut prior to reassembly.

Note gap between Flange

INCORRECT

CORRECT

and Retaining Nut.

No gap between Flange
and Retaining Nut.

28

5.6 FastPrime™ Valve O-Ring Replacement (continued)

6. Recut 1 to 2 inches off the tip of the return line and ensure the end is squared. Press

the return line tubing on completely past the barbs.

O-Rings

O-Rings

Retaining Nut

FastPrimeTM Valve

FastPrimeTM Valve

FastPrimeTM Knob

MAINTENANCE

3/8" Clear Vinyl Tubing

29

MAINTENANCE

5.7 Stroke Length Setting

The Stroke Adjustment Knob is calibrated for each pump, and does not need to be re­moved during Liquifram™ replacement or during most other maintenance. If the Stroke
Knob is removed for any reason it becomes necessary to reset the stroke length. Follow
the procedure below to approximate the proper factory setting. If a more accurate setting
is required contact your distributor or manufacturer.

1. Install a new Stroke Shaft. Note that there will be some resistance as the O-ring slides

into the control panel. The Stroke Knob can be used to turn the Stroke Shaft. Continue
to turn the Stroke Shaft until there is no longer any diaphragm movement. It may be
necessary to turn on the pump in order to get the Stroke Knob completely forward;
however, care should be taken to ensure that the Stroke Shaft is contacting the Plunger
before turning on the unit. Otherwise the pump could be damaged.

2. Once the Stroke Shaft is completely forward, you can reset the stroke length. Press in

the Stroke Knob so that the Stroke Knob Pointer indicates 0 (zero).

3. Use a Phillips head screwdriver to install the Stroke Knob Screw.

4. Insert the Stroke Knob Pointer into the Stroke Knob.

30

5.8 Series A Drive Parts List

140

300

130

80

90

340

220

270

230

505

502

506

310

501

240

320

250

155

150

195

170

125

75

503

504

MAINTENANCE

Bubble

Number

Description

75 PolePiece O-Ring 250 Drive Assembly Screws
80 EPU Return Spring 270 Stroke Shaft O-Ring
90 EPU Shim 300 Warning Label

Bubble

Number

Description

125 Plunger O-Ring 310 Shaft Seal
130 Retaining Ring 320 Adapter Disk
140 Drive Housing 340 Clear Cover
150 EPU Attachment Bolt 501 Control Panel Assembly
155 EPU Attachment Washer 502 EPU Assembly
170 Power Cord 503 Plunger Assembly
195 Stroke Dial Label 504 Pole Piece Assembly

220 Speed Knob O-Ring 505 Stroke Knob Assembly
230 Control Panel O-Ring 506 Speed Knob Assembly

240 Wire Harness

31

MAINTENANCE

A3/A7/A8 PULSER

A0/A1 PULSER

EPU ASSEMBLY

EPU ASSEMBLY

POWER CORDPOWER CORD

BLK OR BRN

WHT OR BLU

GRN OR GRN/YEL

WHT OR BLU

BLK OR BRN

GRN OR GRN/YEL

YEL

YEL

YEL

YEL

P1

P2

P3

P2

P1

P3

P4

P4

615

608

617

40

100

230

607

603

615

40

250

100

270

260

90

A.

B.

5.9 EPU Wiring Diagram

5.10 Liquid End Parts List

Bubble

Number

Description

10 Pump Head
40 Tube Connect O-Ring
90 Seat O-Ring

100 Cartridge Valve O-Ring

120 SS FastPrime™ Valve

140 FastPrime™ Valve Gasket
150 FastPrime™ Valve O-Ring
180 Liquid End Cover
190 Liquifram™

230 Injection Check Valve Body

250 Ceramic Weight

260 Foot Valve Coupling Nut

270 Foot Valve Strainer
601 FastPrime™ Discharge Check Valve

602 Suction Check Valve

603 Cartridge Valve
604 FastPrime™ Cartridge Valve
605 FastPrime™ Valve
606 Liquid End Hardware
607 Foot Valve
608 Injection Valve
609 AutoPrime™ Discharge Check Valve
610 AutoPrime™ Discharge Cartridge Valve
611 AutoPrime™ Shuttle Valve

612 AutoPrime™ Shuttle Cartridge Valve

613* Tubing Connection Kit*

614 AutoPrime™ Return Tubing Connection Kit
615 Single Ball Fitting Assembly
616 Double Ball Fitting Assembly

Injection Valve

Foot Valve

617 Injection Cartridge Valve
618 SS Discharge Check Valve
619 SS Suction Check Valve

32

Refer to Section 3.3 for tubing connections.

190

100

90

100

90

90

100

90

A.

B.

C.

D.

C.

D.

B.

A.

150

140

90

606

10

605

90

604

601

603

604

601

603

602

602

603

603

616

613

615

613

615

616

100

40

40

40

40

MAINTENANCE

Machined FastPrimeTM Liquid End

33

MAINTENANCE

190

100

90

90

90

100

90

A.

B.

C.

D.

C.

D.

B.

A.

150

140

90

606

605

90

604

601

603

604

601

603

602

602

603

603

616

613

615

613

615

616

100

40

40

40

40

100

10

180

34

Molded FastPrimeTM Liquid End

MAINTENANCE

606

190

40

40

40

10

611

602

612

609

603

603

100

603

610

100

100

616

616

613

614

616

613

AutoPrimeTM Liquid End

35

MAINTENANCE

618

619

606 120

10

190

100

90

36

SS Liquid End

TROUBLESHOOTING

6.0 Troubleshooting

PROBLEM POSSIBLE CAUSE SOLUTION

Pump Will Not Prime 1. Pump not turned on or plugged in. 1. Turn on pump/plug in pump.

2. Output dials not set properly. 2. Always prime pump with speed and
stroke at 100%.

Pump Loses Prime

3. Foot Valve not in vertical position on

bottom of tank.

4. Pump suction lift too high. 4. Maximum suction lift is 5 ft (1.5 m).

5. Suction tubing is curved or coiled in

tank.

6. Fittings are over tightened. 6. Do not overtighten ttings. This causes

7. Air trap in suction valve tubing. 7. Suction tubing should be as vertical as

8. Too much pressure at discharge.

(Pumps without multi-function valve.)

1. Solution container ran dry. 1. Rell container with solution and reprime

2. Foot Valve is not in a vertical

position on the bottom of the tank.

3. Pump suction lift is too high. 3. Maximum suction lift is 5 ft (1.5 m).

4. Suction tubing is curved or coiled

in tank.

5. Fittings are over tightened. 5. DO NOT OVERTIGHTEN FITTINGS.

6. Air trap in suction valve tubing. 6. Suction tubing should be as vertical

7. Air leak on suction side. 7. Check for pinholes, cracks. Replace if

3. Foot Valve must be vertical (see Foot
Valve Installation, Section 3.7).

Pumps with High Viscosity Liquid
Handling Assemblies require ooded
suction.

5. Suction tubing must be vertical. Use
LMI ceramic weight supplied with pump
(see Section 3.7).

seal rings to distort and not seat prop­erly which causes pump to leak back
or lose prime.

possible. AVOID FALSE FLOODED
SUCTION! (see Section 3.2.1).

8. Shut off valves in pressurized line.
Disconnect tubing at injection check
valve (see Priming Section 4.2). When
pump is primed, reconnect discharge
tubing.

(see Section 4.2).

2. Foot Valve must be vertical (see Foot
Valve Installation, Section 3.7).

Pumps with High Viscosity Liquid
Handling Assemblies require ooded
suction.

4. Suction tubing must be vertical. Use
LMI ceramic weight supplied with pump
(see Section 3.7).

This causes seal rings to distort and
not seat properly which caused pump
to leak back or lose prime.

as possible. AVOID FALSE FLOODED
SUCTION! (see Section 3.2.1).

necessary.

37

TROUBLESHOOTING

6.0 Troubleshooting (continued)

PROBLEM POSSIBLE CAUSE SOLUTION

Leakage at tubing 1. Worn tubing ends. 1. Cut about 1 in (25 mm) off tubing and

then replace as before.

2. Loose or cracked tting. 2. Replace tting if cracked. Carefully
hand tighten ttings. DO NOT USE
PIPE WRENCH. An additional 1/8 or
1/4 turn may be necessary

3. Worn seal rings. 3. Replace balls and seal rings (see Sec­tion 5.4)

4. Solution attacking Liquid Handling

Assembly

Low Output or Failure
to Pump Against
Pressure

Failure to Run 1. Pump not turned on or plugged in. 1. Turn on or plug in pump.

Excessive Pump
Output

1. Pump’s maximum pressure rating is

exceeded by injection pressure.

2. Worn Seal Rings. 2. Worn seal rings or cartridge valves may

3. Ruptured Liquifram™. 3. Replace Liquifram™ (see Section 5.3).

4. Incorrect stroke length. 4. Reca librate Output (see Section

5. Tubing run on discharge may be

too long.

6. Clogged Foot Valve strainer. 6. Remove Foot Valve strainer when

2. EPU failure. 2. Disassemble pump and measure the

3. Pulser failure. 3. The pulser should be replaced if EPU

1. Syphoning. (Pumping downhill

without a multi-function valve).

2. Little or no pressure at injection

point.

3. Excessive strokes per minute. 3. Replace pulser or resistor. Consult

4. Consult your local distributor for alter­nate materials.

1. Injection pressure cannot exceed

pump’s maximum pressure. See pump
data plate.

need replacement (see Section 5.4).

4.3.2)

5. Longer tubing runs may create frictional
losses sufficient to reduce pump’s pres­sure rating. Consult factory for more
information.

pumping slurries or when solution par­ticles cause strainer to clog.

resistance of the EPU across the EPU
wires. Consult supplier or factory. (see
Section 5.8).

checks out OK. Consult supplier or
factory.

1. Move injection point to a pressurized

location or install an LMI 4-FV (see
Section 3.4).

2. If pressure at injection point is less than
25 psi (1.7 Bar), an LMI 4-FV should be
installed (see Section 3.4).

factory.

38

NOTES

39

© 2009 LMI Milton Roy - All Rights Reserved
Printed in USA
Specications subject to change without notice.

201 Ivyland Rd.

Ivyland, PA 18974

TEL: [phone]

FAX: [phone]

http://www.lmipumps.com

Liquifram, Liquitron, Micropace, FastPrime, AutoPrime,
and Pro Pac are trademarks of Milton Roy Company,
Roytronic is a registered trademark of Milton Roy Company,
Teon is a registered trademark of E. I. du Pont de Nemours
& Co., Inc.