Milton Roy LMI P1 Instruction Manual

LMI ELECTRONIC DOSING PUMPS

Code : P1

Basic manual
Instruction supplement
Spare parts list for drive assembly
Declaration « CE » of conformity
List of « Technical assistance » and « spare parts » departments

07/98

INSTRUCTION MANUAL

FOR INSTALLATION,
OPERATING,
AND MAINTENANCE.

LMI ELECTRONIC DOSING PUMPS

Diaphragm liquid end

Basic manual

This manual should be made available to the person responsible for installation,

operating and maintenance.

Date : 02/2012 Ref : 160.0101

.001 Rev. D

Replaces Rev. 0 09/98

LMI, Doseur à membrane, L001, Rev.B, 1098

CONTENTS

I – DESCRIPTION

I – 1. Unpacking
I – 2. Description
I – 3. Accessories
I – 4. Precautions

II – INSTALLATION

II – 1. Hydraulic installation
II – 2. Electrical installation

III – START UP

III – 1. Priming
III – 2. Output adjustment controls
III – 3. Calibration
III – 4. Volumetric calibration in external mode
III – 5. Pressure control

IV – MAINTENANCE

IV – 1. Spare parts replacements
IV – 2. Checking pump for proper zeroing (stroke knob)
IV – 3. Troubleshooting
IV – 4. EPU Resistance chart

0.0 Precautions

The pump described here may be used for the dosing of liquid products in connection with the applications set out in this
manual.
The following precautions should be taken when working with LMI metering pumps. Please read this section carefully prior to
installation.

Storage precautions

- Storage period of less than six months:

The product should preferably be stored in its original packing and be protected from bad weather.

- Storage period of more than six months:

Store the pump in its original packing. It should be stored covered by a heat-sealing plastic cover and desiccant bags
should be used (quantity dependent on volume and planned storage period). Store away from the influence of bad
weather.

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™
(diaphragm). Reassemble head assembly tightening screws in a crisscross pattern. Refill the pump head with the
solution to be pumped before priming the pump. (This will aid in priming.)

Solution Compatibility

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 specific LMI metering pump. Contact your local MRE distributor for further information.

Tubing Connections

Inlet and outlet tubing or pipe sizes must not be reduced. Outlet tubing size must not be increased. Make certain that
any tubing is SECURELY ATTACHED to fittings prior to start-up (see Section ., Tubing Connections). ALWAYS use
LMI supplied tubing with your pump, as the tubing is specifically designed for use with the pump fittings. 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™ Head
and must not be used as discharge tubing.

Connectors

All connectors shall be tightened by hand. An additional turn of 1/8 to 1/4 might be necessary to ensure tightness. Any
excessive tightening or using a toolmight damage the connecting device and the seals or the liquid end.

All LMI pumps have straight screw machine threads on the head and fittings and are sealed by the O-rings. DO NOT
use Teflon® tape or pipe dope to seal threads. Teflon® Tape 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 fittings.

Installation

Always comply with local regulations and requirements. Always adhere to your local plumbing codes and requirements.
Be sure installation does not constitute a cross connection. Check local plumbing codes for guidelines. Milton Roy
Europe is not responsible for improper installations.

Back Pressure/Anti-syphon valve

If you are pumping downhill or into low or no pressure system, a back pressure/antisyphon device such as LMI’s Four­Function Valve should be installed to prevent over pumping or siphoning. Contact your distributor for further
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 nameplate.. 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 centre in order to avoid a hazard..

Environment

The ambient temperature must be less than 50°C. Avoid direct exposure to sunlight. The pump must be accessible and
situated in a ventilated room.

Noise

The noise level of your equipment is less than 65 dB (A).

Maintenance

CAUTION - ELECTRICAL RISK:
Before performing any maintenance work, deactivate the pump and make sure that all electrical connections are
disconnected.
CAUTION: : DISCHARGE LINE DEPRESSURIZATION
If you are pumping downhill or into low or no pressure system, a back pressure / antisyphon device such as LMI’s
Four-Function Valve should be installed to prevent over pumping or siphoning. Contact your LMI distributor for further
information.
CAUTION: CHEMICAL AND INFLAMMABLE PRODUCTS:
Take all the precautions necessary when performing work on equipment that is dosing chemical and/or inflammable
products. Contact your local Milton Roy Europe distributor for more information.

Earth leakage protection

CAUTION:
It is essential to install an earth leakage circuit breaker calibrated on the basis of the electrical values noted on the
equipment plate.

Cleaning

Make sure that your equipment is clean at all times and that no external items interfere with its functioning.

I - 1

LMI, Doseur à membrane, L001, Rev.B, 1098

PART I – DESCRIPTION

This manual addresses the installation, maintenance and troubleshooting procedures for electronic dosing pumps. An
instruction supplement and a liquid end sheet complete this manual.

Please read them carefully before installing your pump.

I – 1. UNPACKING

The packaging must be carefully
examined on receipt in order to
ensure that the contents have not
sustained any obvious damage.

The carton contains the items
necessary to a proper installation.

I - 2 - DESCRIPTION

Your pump consists of two parts :

1. The drive assembly

2. The liquid handling assembly

The pump code which appears on
the packaging and on the
identification plate consists of two
codes according to drive assembly
type and liquid handling assembly
type.

Dosing pump Function valve * Ceramic weight*

Tubing Injection check valve* Foot valve*

* depending on model

DRIVE

A753

LIQUID HANDLING ASSY

352SM

I - 2

LMI, Doseur à membrane, L001, Rev.B, 1098

Output adjustment controls

According to pump type, output adjustment controls are
available :

• Stroke adjustment
Each pump is equipped with a stroke adjustment.
Stroke control provides adjustment of percent of
maximum diaphragm travel.

Note : For B & C Series, stroke adjustment only when
pump is running.

• Speed adjustment
A1, A7, B1, B7, C1, C7, J5, P1 Series pumps are
equipped with a speed adjustment. Speed control
provides adjustment of the percent of maximum strokes
per minute.

• Pressure control adjustment
B7 and C7 Series Pumps are equipped with a pressure
control adjustment. Pressure control provides the
adjustment of the pump’s pressure capability and power
consumption, reducing heat, pipe shock and pulsation.

For more details, refer to Instruction supplement

I - 3. ACCESSORIES

4-Function valve

This accessory is supplied as standard equipment or as
option. The functions are :

1. Anti-syphon (automatic)

Prevents syphoning when pumping downhill or into a
vacuum.

2. Back pressure (automatic)

Supply approximately 1,7 bar back pressure to prevent
over pumping when little or no system back pressure is
present.

3. Priming (manual)

Prime your pump while it is connected to a pressurized
line.

4. Line depressurization (manual)

By pulling both knobs (yellow and black) the discharge
line will drain back to your supply tank.

3-Function valve

This accessory is supplied as standard equipment or as
option (according to Series 300 models). The functions
are :

1. Priming (manual)

Prime your pump while it is connected to a pressurized
line.

2. Pressure relief (automatic)

Provides protection against excessive system pressure.

3. Line depressurization (manual)

By opening the relief valve, the discharge line will
depressurize without having loosen or disconnect
discharge tubing.

Bleed/4-Function valve

This accessory is supplied as standard equipment or as
option (according to Series 300 models). The functions
are :

1. Anti-syphon (automatic)
Prevents syphoning when pumping downhill or
into a vacuum.

2. Back pressure (automatic)
Supply approximately 1,7 bar back pressure to
prevent over pumping when little or no system
back pressure is present.

3. Continuous bleed (automatic)
This valve is designed to permit an adjustable,
continuous bleed or degasing or entrapped
vapors. It is ideal for pumping small volumes of
solutions having low vapor pressures.

4. Line depressurization (manual)
By opening bleed port, the discharge lline will
depressurize, without having to loosen tubing or
fittings.

Foot valve

(Accessory available according to the model)
The foot valve makes easier priming and keep the

pump primed in suction lift applications.
The strainer prevents sediment to pass through and

valves to clog.

Injection check valveCanne d’injection

The injection check valve prevents backflow from a
treated line.

I – 4. PRECAUTIONS

Always wear protective clothing, face shield, safety
glasses and gloves when working on or near your
metering pump.

All LMI pumps are shipped from factory with water
in pump head to make easier priming.

If the pump head is empty, refill it with water or
solution compatible with pumped solution before
starting up the pump (see note on the Liquid End
Sheet).

Solution compatibility

Verify that the liquid handling components are
compatible with the pumped solution (refer to Liquid
End Sheet).

Make certain that all tubing is securely attached to
fittings prior to start-up.

Tubing supplied allows to match with pump
maximum specifications.

All fittings should be hand tightened.Overtightening
or use of a pipe wrench can cause damage to the
fittings, causing the pump to lose prime or not
function.

All LMI pumps have straight ¾’’- 16N or 7/8 ’’- 14N
or 1"- 12 N machine threads on the head and
fittings.

The seal rings prevent leaks. Do not use Teflon tape
between fittings and pump head.

II - 1

LMI, Doseur à membrane, L001, Rev.B, 1098

PART II – INSTALLATION

II – 1. HYDRAULIC INSTALLATION

The pump can be mounted in one of two ways :

• Flooded suction (ideal installation).

• Suction lift – when suction lift is less than 1,5 m for

solutions having a specific gravity of water. Your
LMI metering pump must be mounted so that the
suction and discharge valves are vertical.

Flooded 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. (Install shut off
valve on the tank).

1 Solution tank 9 Vent
4 Pump 10 Tee
8 Injection check valve

Fig. 2.1a : Flooded suction

Suction lift

• Wall bracket mount. The pump
may be mounted directly above the
solution tank. A pump mounted in
this manner allows for easy
changing of solution tank.

1 Solution tank
4 Pump
6 Pressure line
8 Injection check valve

10 Tee

A 50 mm space for

sediment accumulation

Fig. 2.1b : Suction lift

II - 2

LMI, Doseur à membrane, L001, Rev.B, 1098

• Tank mount. The pump may be
mounted on a molded tank. Tanks
from 60 to 1000 liters are available
for this utilisation.

1 Solution tank
2 Foot valve (equipped

with strainer)
4 Pump
6 Flow
8 Injection check valve

10 Te
11 Ceramic weight

A 50 mm space for

sediment accumulation

• Shelf mount (customer supplied).
The pump may be mounted on a
shelf. An LMI mounting kit is
available for securing the pump to
a shelf. (Series A , B, C).

1 Solution tank
2 Foot valve (equipped

with strainer)
4 Pump
6 Flow
8 Injection check valve

10 Te
11 Ceramic weight

A 50 mm space for

sediment accumulation

Fig. 2.1c : Tank mount

Fig. 2.1d : Shelf mount

II - 10

LMI, Doseur à membrane, L002, Rev.B, 1098

Pump location

Locate pump in an area convenient to solution tank and
electrical supply.
The pump should not be subjected to ambient
temperatures above 50°C. Avoid exposing to direct
sunlight the pump.

Tubing connections

• For installation and trouble-free running, use

only recommended tubing size (refer to spare parts
list).

• Do not use clear vinyl tubing on the discharge

side of the pump. The pressure created by the
pump can rupture the vinyl tubing.

• Before installation, all tubing must be cut with

a clean square end.

• Remove the plugs which protect the head

connections and valves.

• Do not use pliers or pipe wrench on coupling

nuts or fittings.

Refer also to the Liquid End Sheet.

Foot valve/Ceramic weight

The foot valve must be sit in a vertical position at the
bottom.
Position approximately 50 mm off the bottom if the tank
or drum contains sediment.
The ceramic weight positions the foot valve in a vertical
position.
Refer to the Liquid End Sheet for details of connections

1

Solution tank

4

Pump

2

Foot valve

11

Ceramic weight

Fig. 2.2a : Foot valve/Ceramic weight

Injection check valveCanne d’injection

Connect the injection check valve to your discharge
(outlet) line (refer to the Liquid End Sheet).
For in-line injection, use fitting or pipe tee with reducing
bushing to ½’’ (12x17).
Use Teflon tape or pipe dope to seal the pipe threads
only.

When installing the injection check valve, be sure to
position it so that the valve enters the botton of your
pipe in a vertical position (see fig. 2.2b).
Variations left and right within 30° are acceptable.
For low pressure (under 1,7 bar) or open tank use, the
injection nozzle prevents siphoning but not flow
increase.
In this case,we recommend the use of a 4-Function
valve.
Refer to the Liquid End Sheet for details of
connections.

II - 4

LMI, Doseur à membrane, L001, Rev.B, 1098

8 Injection check valve B Use Teflon tape
10 Tee C Do not use Teflon tape
12 Reducing bushing ½ ‘’ D

± 30° variation acceptable

13 Pipe cross section

Fig. 2.2b : Injection check valve

II – 2. ELECTRICAL INSTALLATION

Check the specifications of the pump and compare
them with the voltage available on your installation
before making connections.

WARNING :
To reduce the risk of electrical shock, the metering

pump must be plugged into a fused grounded outlet
with ratings conforming to the pump specification chart
(see Technical characteristics : refer to peak power to
determine the appropriate fuse size).

DO NOT USE ADAPTERS.
All wiring must be conform to local electrical codes.

OVER-VOLTAGE
LMI pumps include a Varistor vonnected on the supply

voltage terminals.
This device is an over-voltage protection. It will burn if

the supply voltage exceeds 150 V for 115 V rated
pumps or 275 V for 230 V rated pumps to protect the
pulser.

As soon as it happends, it means the pump got a too
high voltage peak. After supply voltage control, replace
the Varistor and the pump will run again.

III - 1

LMI, Doseur à membrane, L001, Rev.B, 1098

PART III – START UP

Pumps are shipped from the factory with water in the
pump head to aid in priming. After a long storage, refill
the pump head with water or solution compatible with
pumped solution (see note on the Liquid End Sheet).

III – 1. PRIMING

After connecting the pump, plug in or switch the pump
on. While the pump is running, set the speed knob at
80% and the stroke knob at 100%. If the pump is
equipped with a pressure control knob (B7, C7), set the
switch on « INTERNAL » and turn the pressure control
knob fully clockwise.

III – 2. OUTPUT ADJUSTMENT
CONTROLS

Once the pump has been primed, an appropriate output
adjustment must be made.

The identification plate indicates the output at max.
stroke and max. speed (100%) and max. pressure. The
graduations of stroke knob and speed knob correspond
to percentage of this max. output.

Note : P0 pumps have no stroke adjustment.
Example :
Use max. output = 2,3 L/H. If the pump is set at 40%

speed and 60% stroke lenght, the appropriate pump out
put is 2,3 L/H x 0.40 x 0.60 = 0,55 L/H.

Note : Remember that 6x8 tubing is 0,22 ml/cm which is
0,8 % wrong for 1 l measuring pot.

III – 3. CALIBRATION

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.

1. If equipped (B7 – C7 series), make certain Pressure
control knob is turned fully clockwise.

2. Be sure the pump is in normal service (i.e. including
factors such as injection pressure, fluid viscosity,
suction lift …).

3. Place the foot valve in a graduated container.

4. Start the pump at maximum frequency and let it run
to remove air trapped in suction line (bleed valve
open when using a 4FV). Close bleed after priming.

5. Turn the pump off. Refill graduated container to a
level strarting point.

6. Using a stopwatch or timer, turn the pump on for a
measured amount of time (50 pump strokes
minimum). The longer the time period, the more
confident you can be of the results.

7. The volume and the time unit are known. Calculate
the output. If the output is too low or too great, adjust
speed and or stroke, estimating required correction.

8. Adjust stroke length knob to desired value refering to
calibration.

2 Foot valve 10 Tee
4 Pump 14 Graduate container

(1 l min.)
6 Pressure line E Suction lift
8 Inj. check valve

Fig. 3.2a : Calibration

III - 2

LMI, Doseur à membrane, L001, Rev.B, 1098

III – 4. VOLUMETRIC CALIBRATION IN
EXTERNAL MODE

1. Since pump output is governed by an external device
such as Flowmeter-pulser, Liquitron Current-to­frequency converter or 4-20 mA DC signal from an
instrument with an LMI Analog-to-digital converter,
only the ouptut per stroke may be calibrated.

2. With pump primed and discharge tubin connected to
the injection point as it would be in normal service,
place foot valve in a graduated container.

3. Swtch pump to Internal mode with speed knob set at
100 until air is exhausted from suction line and pump
head.

4. Adjust control pressure (B7 – C7 series).

5. Turn the pump off. Refill graduated container to a
level strarting point.

6. Switch pump on and count the number of strokes.
For a good accuracy, count at least 100 strokes.
Switch pump off.

7. Note the volume pumped during the calibration
period and the number of strokes. Divide into the
volume the number of strokes to determine the
volume of solution pumped per stroke.

8. Adjust stroke length knob to desired value refering to
calibration.

III – 5. PRESSURE CONTROL

Adjust pressure control (B7 - C7 series) : while unit is
running, turn pressure control knob fully clockwise then
turn slowly counter-clockwise until unit just begins to
stall. This is the optimmum pressure control setting for
your installation. Adjust pressure control to prolong
pump life.

Increase setting if back pressure is increased.

F : Excess pressure

Fig. 3.3a : Control pressure

Note : On series A9, B9, C9, this setting is in the main
menu.

IV - 1

IV – MAINTENANCE

IV – 1. SPARE PARTS REPLACEMENTS

WARNING : Always wera protective clothing, face

shield, safety glasses and gloves when performing any
maintenance or replacement on your pump. LMI
metering pumps are designed for trouble-free
operation, yet routine maintenance of elastomeric parts
is essential for optimmum performance.
Refer to the spare parts list.
Replacements frequency will depend on your particular
application. We recommend replacing these parts at
least one a year.

Diaphragm replacement

1. Depressurize the pump (see Liquid End Sheet).

2. Place the foot valve into a container of water or

other neutralizing solution.
Turn the pump on to flush the head assembly. 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. If the liquid cannot be
pumped due to diaphragm rupture, using protective
gloves, carefully disconnect the suction and discharge
tubing. Remove the screws to the head and immerse
the head in water or other neutralizing solution.

3. While running, set the stroke knob to zero and turn

the pump off.

4. Dismantle the liquid end. Unscrew the diaphragm.

Clean the diaphragm recess and the disk. Check the
size of replacement diaphragm, the code (0,5 - 0,9 ­1,8 - 3,0- 6,0) is indicated on the diaphragm and the
disk or spacer (see fig. 4.1a).

5. Reinstall the disk (A, J, P series).

6. Start the pump and turn the stroke knob to the

setting indicated on stroke setting chart which matches
the pump model number located on the pump
dataplate. Stop the pump.

7. Grasp the outer edge of the diaphragm and adjust

by screwing it in or out so that the center of the
diaphragm is flush with the outside of the spacer edge
(see fig. 4.1b). Once the diaphragm is properly
positionned, remount the pump head to the spacer
using the screws. Tighten in a crisscross pattern.
For the diaphragm size 3.0 (show on the diaphragm)
put the glue (loctite 221) on the fixing screws.
Screw the liquid end’s screws at 0.6N.m then tighten
them at 3.5N.m
Note : Tighten the liquid end’s screws diametrically
opposite

AFTER ONE WEEK OF OPERATION, RECHECK
THE SCREWS AND TIGHTEN IF NECESSARY.

16 Diaphragm 18 Code
17 Spacer

Fig. 4.1a : Diaphragm identification

15 Straight edge G Gap
16 Diaphragm H No gap
17 Spacer

Fig. 4.1b : Diaphragm fitting

Pump series

Stroke knob setting

AA - A – B – J – P (tous
modèles)
Cx0 – Cx1 – Cx2
Ex0 – Ex1 – Ex2

90 %

Cx3 – Cx4 – Cx5
Ex3 – Ex4

70 %

IV - 2

LMI, Doseur à membrane, L001, Rev.B, 1098

Ball, seal ring and injection check valve spring
replacement or set of cartridges replacement
(depending on model)

Refer to the spare parts list for the proper sparte parts
kit number.

1. Depressurize the pump (see Liquid End Sheet).

2. Flush and purg the pump head before dismantling
(see above).

3.During dismantling, note the orientation of each item.

4. Dismantling the injection check valve. Unscrew the
valve body and replace the spring, the ball and the
seal ring. Refer to the spare parts list drawing.

5. Replace the seal rings and balls in the pump head
and the foot valve. Order of assembly changes
depending on valve location.

6. In case of cartridge liquid end, see spare parts list
drawing to identify the orientation of each item.

IV – 2. CHECKING PUMP FOR PROPER
ZEROING (STROKE KNOB)

1. With pump running, turn stroke knob counter­clockwise toward zero or end of black or red band.

2. Listen to the clicking as the pump is running. The
pump shoukd operate quietly at the zero position (no
clicking). If the pump continues to click at zero or
stops clicking before zero is reached, the pump zero
must be reset.

Push on knob

1. Remove stroke knob from the pump by grasping the
knob firmly and pulling it toward you.

2. Pry off the yellow cap.

3. Place the knob on a flat surface.

4. Using needle nose pliers, squeeze the inner section
together while lifting the outer section up.

5. Push the inner section back onto the « D » shaped
stroke shaft.

6. With the pump running, zero the pump by turning the
inner sectionof the knob counter-clockwise until the
pump stops clicking.

7. Position the outer section of the knob so that the
pointer aligns with zero on the nameplate or end of
the black or red band.

8. Push down on the outer section (a snap sound
indicates parts are locked together).

9. Replace the yellow cap over the outer section of the
knob, aligning the tabs on the cap with the slots
inside the knob.

20 Shaft 22 Knob base
21 Knob pointer 24 Knob pointer

Fig. 4.2a : Push on knob

IV - 3

LMI, Doseur à membrane, L001, Rev.B, 1098

IV – 3. TROUBLESHOOTING

Pump will not prime

• Pump not turned on or plugged in.
Turn on pump/plug in pump.

• Output dials not set properly.
Always prime pump with speed at 80 % and stroke
at 100 %.

• Foot valve not in vertical position on bottom of tank.
See Chapter II – 1. Section Foot valve/ceramic
weight.

• Pump suction lift too high.
Maximum suction lift is 1,5 m. Pump with High
viscosity liquid handling assemblies require flooded
suction.

• Suction tubing is curved or coiled in tank.
Suction tubing must be vertical. Use ceramic weight
supplied with pump. (see Chapter II – 1. Section
Foot valve/ceramic weight).

• Fittings are over tightened.
Do not overtighten fittings. This causes seal rings to
distort and not seat propertly which causes pump to
leak back or lose prime.

• Air trap in suction valve tubing.
Suction tubing should be as vertical as possible.
AVOID FALSE FLOODED SUCTION (see Chapter
II – 1. Section Flooded suction).

• Too much pressure at discharge (pump without 4­function valve).
Shut off valves in pressurized line. Disconnect
tubing at injection check valve (see Chapter III – 1.
Priming). When pump is primed, reconnect
discharge tubing.

Pump loses prime

• Solution container ran dry.
Refill container with solution and reprime (see Part
III).

• Foot valve not in vertical position on bottom of tank.
See Chapter II – 1. Section Foot valve/ceramic
weight.

• Pump suction lift too high.
Maximum suction lift is 1,5 m. Pump with High
viscosity liquid handling assemblies require flooded
suction.

• Suction tubing is curved or coiled in tank.
Suction tubing must be vertical. Use ceramic weight
supplied with pump. (see Chapter II – 1. Section
Foot valve/ceramic weight).

• Fittings are over tightened.
Do not overtighten fittings. This causes seal rings to
distort and not seat propertly which causes pump to
leak back or lose prime.

• Air trap in suction valve tubing.
Suction tubing should be as vertical as possible.
AVOID FALSE FLOODED SUCTION (see Chapter
II – 1. Section Flooded suction).

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

Leakage at tubing

• Worn tubing ends.
Cut tubing about 25 mm (1’’) off tubing and then
replace as before.

• Loose or crack fitting.
Replace fitting if cracked. Carefully hand tighten
fittings. Do not use pipe wrench. Once fitting comes
into contact with seal ring, tighten an additional 1/8
or ¼ turn.

• Worn seal rings.
Replace balls and seal rings (see part IV).

• Solution attacking Liquid handling assembly
material.
Consult Technical Assistance Department for
alternate materials compatible with the pumped
solution.

Low output or failure to pump against
pressure

• Pump’s maximum pressure rating is exceeded by
injection pressure.
Injection pressure cannot exceed pump’s maximum
pressure. See pump data plate.

• Worn seal rings.
Replace them : see Chapter IV –1.

• Ruptured diaphragm.
Replace diaphragm : see Chapter IV –1. Section
Diaphragm replacement.

• Incorrect stroke length.
Check zero on pump/Re-zero pump (See Chapter
IV – 2.).

• Tubing run on discharge may be too long.
Longer tubing runs may create frictional losses
sufficient to reduce pump’s pressure rating.

• Clogged foot valve strainer.
Remove foot valve strainer when pumping slurries
or when solution particles cause strainer to clog.

Failure to run

• Pump not turned on or plugged in.
Turn on or plug in pump. Check also programming
(A9, B9, C9 Series).

• EPU failure.
Disassemble pump and measure the resistance of
the EPU across the EPU wires. Resistance reading
should be in accordance to the table (see Chapter
IV – 4.). Also check EPU leads to ground.

• Pulser failure.
The pulser should be replaced if EPU checks out
OK.

IV - 4

LMI, Doseur à membrane, L001, Rev.B, 1098

Excessive pump output

• Syphoning. Pumping downhill without a 4-FV.
Move injection point to a pressurized location or
install an 4-FV.

• Little or no pressure at injection point.
If pressure at injection point is less than 1,5 bar (25
psi), an 4-FV should be installed.

• Excessive strokes per minute.
Replace pulser or control panel.

IV – 4. EPU RESISTANCE CHART

Pump series Voltage Coil resistance (ohms)

20° C (68°F)

Ax4, Ax5, Ax6 115 V 76 – 87
Px4, Px5, Px6, Px8
H9

230 V 307 – 353

Ax7, Ax8 115 V 152 – 176
Px2, Px3 230 V 583 – 671

Bx1, Bx2, Bx3, Bx4 115 V 43 –49

230 V 167 – 193

Cx0, Cx1, Cx2, Cx3, Cx4, Cx5 115 V 22.8 – 26,2
E70, E71, E72, E73, E74 230 V 91 – 105

J54D, J55D, J56D 12VDC 1.1 – 1.3

Instruction Supplement

LMI PUMP SERIES P1

Date : 10.98

Replaces Rev. 0 , 07.98

REF. : 161.5304.001 Rev. A

1 Foot valve 9 Injection check valve
2 Ceramic weight 10 Discharge tubing
3 Suction tubing 11 Spacer E.P.U.
4 Suction fitting 12 Metering pump housing
5 Return line (pressure relief) 13 Speed knob
6 Pump head 14 Stroke knob
7 4-Function valve (option) 15 Power cord
8 Coupling nut

Metering pump component diagram

LMI PUMP SERIES P1

2/3

Control panel detail

Wiring diagram

1 Identification plate
2 Stroke knob
3 Speed knob
4 Stroke light

1 Potentiometer
2 Stroke led
3 Pulser assembly
4 Power cord
5 Mov/cap assembly
6 EPU assembly

23 P12x, P13x : cut 1 resistor

Other P1 : leave both resistors
BLU Blue
BRN Brown

GRN/YEL Green/yellow

YEL Yellow

LMI PUMP SERIES P1

3/3

TECHNICAL CHARACTERISTICS

P12x P13x P14x P15x P16x P18x

Output

- max. (l/h)

- min (ml/h)

0.75

2.25

1.6

4.8

2.2

4.4

3.8

7.6

7.6

15.2

12

24
Max. pressure (bar) 10.3 7.6 17.3 7.6 3.5 1.5
Stroke capacity (ml)

- min.

- max.

0.07

0.22

0.13

0.44

0.07

0.37

0.13

0.63

0.25

1.27

0.40

2.00

Stroke frequency (cps/mn)

- min.

- max.

1

60

1

60

1

100

1

100

1

100

1

100
Diaphragm size (in2) 0.5 0.9 0.5 0.9 1.8 1.8
Min. recommanded stroke lenght (%) 30 30 20 20 20 20
Peak power (W) 75 75 150 150 150 150
Average power (Wh) 11 11 22 22 22 22

Note :
The « x » which appears in the code designates both voltage and power cord/plug type.

Pipe Thread Connection 1/4" or 1/2"

Typical injection check valve installation

Liquid End Sheet

1 ”pipe tee

Reduction*

1 ”to ½ ”NPT

injection
check valve

CORRECT

Use Teflon tape on

the thread only

CORRECT

Do NOT use

Teflon tape on

machined thread

injection
check

valve

Flow

Flow

40°Variation
acceptable

* customer supplied

NPT pipe
connection

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

(Pressure can rupture tubing.)

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

Tubing Connections

Your pump will be supplied with one of the following
tubing connections. Before installation, all tubing must
be cutted with a clean square end. Valve and head
connections from the factory may be capped. Remove
and discard these caps before connecting the tubing.

Apply Teflon© tape.

(Customer supplied pipe

connections)

Injection Check Valve and
Discharge Tubing Installation

The Injection Check Valve prevents backflow from a
treated line. Connect the Injection Check Valve to your
“DISCHARGE” (outlet) line. An NPTF fitting or pipe tee
with a reducing bushing to 1/2" NPTF will
accept the injectioncheck valve. Use Teflon® tape or
pipe dope to seal the pipe threads only.

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
40° are acceptable (see illustration below).

After cutting an appropriate length of discharge tubing,
connect tubing to the injection check valve then back
discharge

Make sure it does not crimp or come into contact with
hot or sharp surface (see Tubing Connections).

When pumping solutions, make certain that all tubing is securely attached to the fittings. It is
recommended that tubing or pipe lines be shielded to prevent possible injury in case of rupture or accidental
damage. Always wear protective clothing and face shield when working on or near your metering pump.

Flexible pipe connection with connection Nozzle

A : Nut C : Connection Nozzle
B : End fitting D : Connection
Encase properly pipe into connection nozzle as shown in
the drawing

Flexible connection without connection Nozzle

Mounting Steps : Manual mounting

1

At the startup of the pump check that the assembly does not
leak

2

: Fit the part 3 on
the part 4 in
mechanical stop

3

Pull on the part 3 for
checking the
assembly

Use Ceramic
Weight

pump pump

Foot Valve
Must Reamin
Vertical

CORRECTINCORRECT

2.0in (50mm) for Sediment
Accumulation

solution
tank

Foot Valve Tilted Sideways

Foot Valve Tubing Connection

WILL NOT PRIME

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 (50mm)
off the bottom if the tank or drum contains sediment.
The ceramic weight, when installed, positions the foot
valve in a vertical position.

NOTE: Pump models equipped with high-viscosity
liquid end s are not equipped with foot valves. Flooded
suction is recommended A 1/2" NPT connector is
included for flooded suction installations.

1. Cut a piece of suction tubing to a length so that the
foot valve hangs just above the bottom of the
solution container. Maximum recommended
vertical suction lift is 5 feet (1.5 m).

2. Attach the foot valve to one end of the suction
tubing.

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

4. 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 ullustration). Connect the
Connect the other end of the tubing to the suction
side (bottom side) of the pump head (see Tubing
Connections).

Multi-Function Valve Installation

To install the multi-function valve, remove the yellow
screw cap on the top of the pump head and screw in
the valve so that it contacts the seal ring. An additional
1/8 – 1/4 turn may be necessary to prevent leakage.

1/4" O.D. tubing connects to the side of the valve and
acts as a return line to the solution tank. To ensure
priming, this tubing must NOT be submerged in the
solution.

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

Depressurizing Discharge Line

(pumps equipped with multi-function

valves)

It is possible to depressurize the discharge line and
pump head without removal of tubing or loosening of
fittings.

1. Be sure injection check valve is properly installed
and is operating. If a gate valve or globe valve has
been installed downstream of injection check
valve, it should be closed. Be certain relief tubing
from the multi-function valve is connected and run
to solution reservoir.

2. Turn Pressure Relief knob 1/4 turn.

3. Open the anti-syphon valve, if equipped

4. The discharge line is now depressurized.

5. If injection check valve is of higher elevation than

pump head, disconnecting tubing at the injection
check valve end will allow air to enter and cause
solution to drain back to tank.

Discharge

To Pump Head

¼ ” Tubing

Coupling nut

To solution Tank

Bottom Tubing

in Fitting

Push and hold while

tightening connector.

1 Inch

(25 mm)

Multi-Function Valve Tubing Connection

1 Flapper valve
2 Injection check valve body
3 Injection check valve spring
4 Check valve ball
5 Seal ring
6 Cartridge valve
7 Cartridge valve o-ring
8 Cartridge valve washer
9 Valve seat
10 Clamp ring
11 Ferrule
12 Clamp sleeve
13 Tubing adapter
14 Coupling nut
15 Discharge tubing
16 Valve housing
17 Multi-function valve
18 High-viscosity spring
19 Liquifram
20 Pump head
21 Pump head screw
22 Suction tubing
23 Foot valve seat
24 Foot valve screen
25 High-viscosity valve seat
26 H.V. tubing clamp
27 H.V. suction tubing
28 H.V. Tubing x 1/2 NPT connector
29 Injection check valve assembly
30 Discharge valve assembly
31 Suction valve assembly
32 Pump head assembly
33 Foot valve assembly
34 Injection Seat PTFE
35 Ceramic Weight
36 Return Line
37 Cap ASM (Black Knob)
38 Cap ASM (Yellow Knob)
39 Multi-Function Valve Body
40 Nut Multi-Function Valve
41 Screw Multi-Function Valve
42 Return Line Coupling Nut
43 Adjustment Screw B/4-FV
44 Cap B/4-FV
45 Plug B/4-FV
46 Gasket B/4-FV
47 Small O-Ring B/4-FV
48 Large O-Ring B/4-FV

Liquid End Parts List

NOTE: This illustration is a visual

representation of all LE components.
Liquid ends will not include all parts
shown.

40

42

40

36

38

39

48

47

46

45

44

41

43

41

42

36

41

39

37

17

17

17

37

39

38

40

42

36

3FV

B/4FV

4FV

Bleed 4-FV

Start-Up/Priming for Pump
Supplied with Multi-Function
Valve

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.

1. Plug in or switch the pump on.

2. While the pump is running, set the speed knob at

80 %and the stroke knob at 100%.

If the pump is equipped with pressure control, turn fully
clockwise.

3. 1/4 turn open the relief side (black knob) of the
multi-function valve.

3A. (Bleed 4FV only) With screwdriver rotate bleed

adjustement screw counter-clockwise 2 full turns.
When solution begins to flow through translucent
bleed return tubing, the pump is primed. Stop
pump.

4. The suction tubing should begin to fill with solution
from the tank.

5. A small amount of solution will begin to discharge
out the return line of the multi-function valve. Once
this happens,1/4 turn or release the knob and
SHUT THE PUMP OFF. (If pump is not equipped
with an on/off switch, or disconnect the power
cord.)

6. The pump is now primed.

6A. (Bleed 4FV only)

a. Start pump and let pump inject solution into

the discharge line.

b. Close the bleed adjustment screw by rotating

it clock-wise with a screwdriver.

c. Now adjust the pump stroke length and/or

speed (frequency) to a range approximately
25% higher than you would normally want for
the process.

d. Slowly rotate bleed adjustment screw counter-

clockwise until just a small amount of solution
begins to trickle down inside the bleed return
tubing. A small amount of solution pumped
back to the tank with each stroke of the pump
will allow gas and air to escape without air or
gas locking in the pump head.

NOTE: If the pump does not self-prime, remove the
multi-function valve 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.

Start-Up/Priming without Multi­Function Valve

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 prime the pump.

1. Plug in or switch on the pump.

2. While the pump is running, set the speed knob at

80% and the stroke knob at 100%.

If the pump is equipped with pressure control, turn fully
clockwise.

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

4. Once the solution begins to exit the pump head on
the dis-charge side, SHUT THE PUMP OFF. (If
pump is not equipped with an on/off switch,
disconnect the power cord).

5. The pump is now primed.

NOTE: If the pump does not self-prime, remove the

fitting on the discharge side of the pump head. Remove
the ball and pour water or solution into the port until the
head is filled. Replace valve, then follow start-up/
priming steps.

Rotate clockwise

to close Bleed

Adjustment Screw

Anti-Syphon

Knob

Negative pressure
at discharge closes
diaphragm and
prevents syphoning.

Bleed

(Relief) Port

Space open

to drain

Pump discharge stroke
lifts diaphragm to allow
for fluid flow.

F

DECLARATION "CE" DE CONFORMITE

Nous, déclarons que le matériel désigné ci-après a été conçu et fabriqué suivant les directives et spécifications suivantes :
Directive basse tension 2006/95/EEC

Directive CEM 2004/108/EEC

GB

"EC" DECLARATION OF CONFORMITY

We, certify that the equipment designated below has been designed and manufactured in accordance with the specifications
of the following :

Low voltage Directive 2006/95/EEC

EMC Directive 2004/108/EEC

D

EG-KONFORMITÄTSERKLÄRUNG

Wir, verklären, daß die nachgestehend bezeichneten Gerätschaften im Einklang mit folgenden Richtlinien und Spezifikationen
geplant und hergestellt wurden :

EG-Richtlinie 2006/95 für Niederspannung

EG-Richtlinie 2004/108 zur elektromagnetischen Verträglichkeit

NL

EG FABRIKANTENCONFORMVERKLARING

De ondergetekenden, verklaren geheel onder eigen verantwoor delijkheid dat het produkt waarop deze verklaring betrekking
heeft in overeenstemming is met:

Richtlijn 2006/95/EEG inzake elektrisch materiaal bestemd voor gebruik binnen b epaalde spanningsgrenzen;

Richtlijn 2004/108/EEG inzake elektromagnetische compatibiliteit.

I

DICHIARAZIONE DI CONFORMITA' "CE"

La società, Dichiara che il materiale sotto specificato è stato progettato e realizzato in conformità con l e seguenti direttive e
specifiche:

Direttiva bassa tensione 2006/95/EEC

Direttiva CEM 2004/108/EEC

E

DECLARACION "CE" DE CONFORMIDAD

Nosotros, declaramos que el material detallado a continuación está diseñado y fabricado de acuerdo a la siguientes
directivas y normas :

Directiva basa tensión 2006/95/EEC

Directiva EMC 2004/108/EEC

TYPE / TYP / TIPO
LMI : AA7.. / AA9.. / B1.. / B7.. / B9.. / C1.. / C7.. / C9.. / H9.. / J5.. / P0.. / P1.. / P5../ E7

Alain LAMPERIER
Le Directeur Production
Production Manager

AQFORM 289

10/2010

Page 1/1

PS-GARANTIE /1

1

GUARANTEE

The vendor guarantees his products according to the Milton Roy Europe . general conditions
of sale.

The guarantee for components and sub-assemblies not fabricated by the vendor is limited
tothat given by the supplier.

The vendor’s guarantee only covers the replacement or the repair, at his cost and in his
factory, of all parts acknowledged by his technical services as being defective due to an error
in conception, of material or of execution.

It is the purchasers responsability to prove the said defects. The guarantee does not cover
the replacement of wear parts mentioned in part V - Preventive Maintenance.

The vendor reserves the right to modify all or part of his products in order to satisfy the
guarantee. The guarantee does not cover charges arising from dismantling, assembly,
transport and movements.

The replacement of one or several parts, for whatever reason, does not prolong the period of
guarantee.

The guarantee is not applicable notably in the following cases :
installation not in accordance with standard current practice.

deterioration or accident resulting from negligence.
lack of surveillance or maintenance.
modifications to conditions of use.
chemical corrosive or erosive attack. The proposed materials of construction are
recommendations subject in all cases to verification and acceptance by the client. The
recommendations, based on the experience of the vendor and the best available information,
do not guarantee against wear or chemical action.

The guarantee ceases :
if the storage of the material, outwith the vendors factory, does not conform to his

recommendations or to current standard practices.
in case of work or dismantling of the material by someone who does not respect written
recommendations of the instruction manual (when replacing wear parts).
if parts from another origin are substituted for the original parts supplied by the
manufacturer.

The purchaser cannot call on guarantee claims to justify differing payments.

INDUSTRIAL OWNERSHIP

This manual can only be used by the purchaser or the user. It cannot be distributed,
published, reproduced (partially or totally) or generally communicated to third parties without
the advance, formal written authorisation of the vendor.
Any breach of these rules may result in legel action being taken.

FRANCE

Tel.: [phone] / Fax: [phone]
E-mail: [e-mail]
Assistance technique / Technical assistance: ?el.: +33.(0.2.32.68.30.02 - Fax: [phone]
Pièces de rechange / Spare parts: ?el.: +33 (0)2.32.68.30.01 - Fax: [phone]
E-mail: [e-mail]
10 Grande Rue 27360 Pont-Saint-Pierre - FRANCE

www.miltonroy

-europe.com

ESPANA / PORTUGAL

Sistemas de Dosificación y Mezcla de Fluidos, S.L.

Tel.: [phone] - Fax : [phone] - E-mail: [e-mail]
C/ Embajadores, 100
28012 Madrid - ESPANA

www.sdm

-sistemas.com

ITALIA / MALTA

Milton Roy Italia Srl

Tel.: [phone] - Fax: [phone]
E-mail: [e-mail]
Centro Direzionale Colleoni Via Paracelso, 16
Palazzo Andromeda Ingresso 2
20041 Agrate Brianza (Ml) - ITALIA

www.miltonroy

-europe.com

UNITED-KINGDOM / NORTHERN EUROPE

Milton Roy UK, Ltd

TECHNICAL ASSISTANCE AND SPARE PARTS :
Tel.: [phone] - Fax: [phone]
E-mail: [e-mail]
North Hylton Road
Sunderland, SR5 3JD - UNITED-KINGDOM

www.miltonroy

-europe.com

NORTH AND SOUTH AMERICA

LMI Milton Roy Milton Roy Company

Tel.: [phone] - Fax: [phone] Tel.: [phone] - Fax: [phone]
E-mail: [e-mail] E-mail: [e-mail]

201 Ivyland Road 201 Ivyland Road
Ivyland, PA 18974 - USA Ivyland, PA 18974 - USA

www.lmipumps.com

www.miltonroy.com

FOR OTHER COUNTRIES:

Visit our web site at www.miltonroy-europe.com for a complete list of our distributors network around the world.
For further details you can contact our headquarter located in France at [e-mail].