LMI ROYTRONIC EXCEL AD Series User manual

ROYTRONIC EXCEL™ Series AD
Electronic Metering Pumps
Instruction Manual
Manual No : 2024
Rev. : G
Rev. Date : 06/2019

iInstruction Manual
Liquid End
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
5 – 220-240V UK Plug
6 – 220-240V Aust/NZ Plug
7 – 220-240V Swiss Plug
8 – 110-120V No Plug
6 – High Viscosity Head
7 – Molded Head, Single Ball Check Valves
8 – Molded Head, Double Ball Check Valves
9 – Machined Head, Double Ball Check Valves
1 – 0.2 in2
2 – 0.4 in2
3 – 0.8 in2
4 – 1.6 in2
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 AD 2 5 1 - 8 3 8 S I
Model Code Configuration
Drive
(SS 1/4” NPT)
AD2 - Dual Manual Control – Digital:
Stroke frequency and length manually adjustable with digital LCD
display, low level indication (remote input). Display configurable to
indicate calculated pump flow.
AD8 - Pulse/Analog Input w/ Dual Manual Control – Digital:
Pulse or 4-20 mA signal input controls frequency, digital LCD display,
manual stroke length control, frequency manually adjustable when in
local control, pulse multiply/divide functions, 24 V output for remote
device. Includes dual low level float switch input. Display configurable
to indicate calculated pump flow.
AD9 - Pulse/Analog Input w/Dual Manual Control &
Enhanced Controls – Digital:
Advanced Features - Pulse or 4/20 mA signal input controls
frequency, Digital graphical display, manual stroke length control,
Frequency manually adjustable when in local control, Pulse
multiply/divide functions, 24 V output for remote device, dual
low level float switch input, Remote on/off signal input. Outputs
include: 4-20 mA, pulse, & Alarm. Remote internal/external mode input.
V – High Viscosity Head
P – High Viscosity w/Ported Head
*Note: Not all configurations are available. Please See your local
distributor or price list for available options.
ROYTRONIC EXCEL™ Series AD

iiInstruction Manual
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 SDS 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. Rell the pump head with the solution to be pumped
before priming the pump. (This will aid in priming.)
Liquid Compatibility
The evaluation performed by UL was tested with water only. LMI®pumps are tested to NSF
50 for use on muriatic acid (40%) and sodium hypochlorite (12.5%). The pumps are certied
to NSF 61 with: sodium hypochlorite (12.5%), sulfuric acid (98.5%), sodium hydroxide (50%),
and hydrochloric acid (30%). 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.
Tubing Connections
Inlet and outlet tubing or pipe sizes must not be reduced. Make certain that all tubing is
SECURELY ATTACHED to ttings prior to start-up (see Section 2.3, 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 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.

iii Instruction Manual
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.
Most LMI® pumps have straight screw machine threads on the head and ttings and are
sealed by the O-rings. DO NOT use PTFE tape or pipe dope to seal threads. PTFE Tape may
only be used on the 1/2” NPT thread side of the Injection Check Valve, the stainless steel
liquid end connections, except for the head’s discharge port, or if piping is directly connected
to the pipe threads of the suction or discharge ttings.
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/anti-syphon
device such as LMI®’s Four Function Valve should be installed to prevent over pumping or
syphoning. Contact your LMI®distributor for further information.
Electrical Connections
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.
Fuse (all models) and Battery (AD9 only)
Caution, Battery may explode if mistreated. Do not recharge, disassemble or dispose of in
re. The battery and fuse are internal, factory serviceable parts, and must be replaced by the
factory or a qualied distributor with parts of the same type and rating.
Flooding
Install this pump in a location where ooding cannot occur.
Ground Fault Circuit Interrupter
To reduce the risk of electric shock, install only on a circuit protected by a Ground Fault
Circuit Interrupter (GFCI).

ivInstruction Manual
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/pressure
relief 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 inch-pounds after the
rst week of operation and on a monthly basis thereafter.
Flow Display
The default ow value as shown on the pump display is accurate at maximum pressure and
100% stroke length. If your operating conditions differ from this, then calibration is necessary
in order to display an accurate measure of the ow.

vInstruction Manual
SECTION 1 - INTRODUCTION ......................................................................................... 1
1.1 SPECIFICATIONS ......................................................................................... 1
1.2 UNPACKING CHECK LIST ................................................................................. 2
SECTION 2 - INSTALLATION .......................................................................................... 3
2.1 PUMP LOCATION AND INSTALLATION .................................................................... 3
2.2 PUMP MOUNTING ....................................................................................... 3
2.2.1 Flooded Suction ....................................................................................... 3
2.2.2 Suction Lift - Wall Bracket Mount ....................................................................... 3
2.2.3 Suction Lift - Tank Mount............................................................................... 3
2.2.4 Suction Lift - Shelf Mount .............................................................................. 3
2.3 TUBING CONNECTIONS .................................................................................. 5
2.4 FOUR-FUNCTION VALVES (4-FV).......................................................................... 6
2.5 FOUR-FUNCTION VALVES INSTALLATION ................................................................. 7
2.6 FAST PRIME™........................................................................................... 8
2.7 AUTO PRIME™.......................................................................................... 8
2.8 FOOT VALVE / SUCTION TUBING INSTALLATION ........................................................... 9
2.9 INJECTION CHECK VALVE AND DISCHARGE TUBING INSTALLATION .......................................10
SECTION 3 -OPERATION.............................................................................................11
3.1 OUTPUT ADJUSTMENT CONTROLS ......................................................................11
3.2 START-UP AND ADJUSTMENT ...........................................................................14
3.2.1 Start-Up/Priming for FASTPRIME™ Heads (LE-XXXNX)...................................................14
3.2.2 Start-Up/Priming for Pump Supplied with 4-FV (LE-XXXSX or LE-XXXHX) ................................14
3.2.3 Start-Up/Priming for AUTOPRIME™ Heads (LE-XXXAX or LE-XXXHX) .....................................15
3.3 OUTPUT ADJUSTMENT .................................................................................15
3.3.1 Total Pump Output ...................................................................................15
3.3.2 Calibrating the Displayed Flow (AD2, AD8).............................................................15
3.4 METHODS OF EXTERNALLY TRIGGERING OR PACING AD8 AND AD9 PUMPS...............................17
3.4.1 Control Modes........................................................................................19
3.4.1.1 Local/Internal Mode.................................................................................19
3.4.1.2 Changing Displayed Flow Units (AD2, AD8) ..........................................................19
3.4.1.3 Remote Mode (for AD8) .............................................................................19
3.4.1.3.1 Divide Mode (for AD8).............................................................................19
3.4.1.3.2 Multiply Mode (for AD8) ...........................................................................19
3.4.1.3.3 Analog Mode (for AD8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
TABLE OF CONTENTS

viInstruction Manual
SECTION 4 - SPARE PARTS REPLACEMENT AND ROUTINE MAINTENANCE..............................................21
4.1 DEPRESSURIZING THE DISCHARGE LINE (FOR PUMPS EQUIPPED WITH A 4-FV ONLY) ......................21
4.2 DEPRESSURIZING THE DISCHARGE LINE (FOR SINGLE BALL FASTPRIME™ HEADS ONLY)....................21
4.3 LIQUIFRAM™ (DIAPHRAGM) REPLACEMENT..............................................................22
4.4 START-UP / PRIMING FOR AUTOPRIME™ HEADS ..........................................................23
4.5 INJECTION CHECK VALVE PARTS REPLACEMENT..........................................................24
4.6 FASTPRIME™ VALVE O-RING REPLACEMENT ..............................................................25
4.7 DRIVE PARTS LIST.......................................................................................27
4.8 EPU Wiring Diagram ....................................................................................28
4.9 LIQUID END PARTS .....................................................................................29
SECTION 5 - WIRING DIAGRAMS .....................................................................................32
SECTION 6- TROUBLESHOOTING ....................................................................................39

1Instruction Manual
LMI®is the world’s most versatile manufacturer
of economical and efficient 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.
Note:
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.
1.1 SPECIFICATIONS
AD2XY
(where X is any number;
where Y is 1, or 8)
AD2XY
(where X is any number;
where Y is 2,3,4,5,6,7, or 9)
AD8XY, or AD9XY
(where X is any number;
where Y is any number)
Operating
Temperature
14 to 113°F
–10 to 45°C
14 to 113°F
–10 to 45°C
14 to 113°F
–10 to 45°C
Voltage 110 to 120 V 220 to 240 V 95 to 240 V
Frequency 50 to 60 Hz 50 to 60 Hz 50 to 60 Hz
Max. Current 2.0 A 1.0 A 1.4 A
Wattage 25 W 22 W 20 W
AD2 AD8 AD9
Battery N/A N/A
Panasonic BR1225 or
Renata CR1225 or
Energizer/Eveready
CR1220
Fuse Bel Fuse 5HT1.25-R
Time-lag, 5mm x 20mm
Bel Fuse 5HT 2-R
Time-lag, 5mm x 20mm
Bel Fuse 5H 2-R
Time-lag, 5mm x 20mm
Table 1
Table 2
SECTION 1 - INTRODUCTION
Note:
The battery and fuse are internal, factory
serviceable parts, and must be replaced by the
factory or a qualied distributor with parts of the
same type and rating.

2Instruction Manual
SECTION 1 - INTRODUCTION
1.2 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.
Metering Pump
Injection Check
Valve
Foot Valve Tubing (0 to 3 Rolls)
Ceramic Foot
Valve Weight Four-Function Valve
(Optional)
External Control Cable
(0, 1, or 2 Cables) Tube Connection
Hardware
Figure 1. Unpacking Check Sheet

3Instruction Manual
2.1 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.
2.2 PUMP MOUNTING
The pump can be mounted in one of two ways:
A. FLOODED SUCTION (ideal installation); or
B. SUCTION LIFT - when suction lift is less
than 5 feet (1.5 m) for solutions having a
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.
2.2.1 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
CORRECT
SECTION 2 - INSTALLATION
Figure 2. Flooded Suction Pump Mounting

4Instruction Manual
SECTION 2 - INSTALLATION
2.2.2 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.
2.2.3 Suction Lift - Tank Mount
The pump may be mounted on a LMI®10-gallon
tank (part no. 27421), 35-gallon tank (part no.
27400), and 50-gallon tank (part no. 26350).
2.2.4 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).
Figure 3

5Instruction Manual
(5-10 mm)
1/4" - 3/8"
1/4" O.D. or
3x6mm
Tubing
Ferrule-
Female
Coupling Nut
Fitting
O-Ring
Figure 4
Coupling Nut
Fitting
O-Ring
Ferrule-
Female
Ferrule-
Male
1/2”O.D. or
9X12 mm
Tubing
3/8”O.D. or
6X8 mm
Tubing
Figure 5
Tube Size Kit Number
1/2” Tube 77382
3⁄8” Tube 77383
1/2” Tube 77384
3 x 6 mm Tube 77378
6 x 8 mm Tube 77379
9 x 12 mm Tube 77380
*One kit is needed for each end of the tube.
2.3 TUBING CONNECTIONS
1. Insert tubing through Coupling Nut. Tubing
should enter the smaller end of the Coupling Nut
rst, orienting the larger opening of the Coupling
Nut toward the tubing end.
2a. For 1/4” OD tubing: Position the Female
Ferrule so that 1/4” to 3/8” (5-10 mm) of tubing
protrudes from the Female Ferrule. Orient the
raised collar of the Ferrule toward the Coupling
Nut (reference Figure 4).
2b. For 3/8” or 1/2” OD tubing: Position a Female
Ferrule about 1 inch (25 mm) from end of tubing.
Orient the raised collar of the Female Ferrule
toward the Coupling Nut. Then, insert the Male
Ferrule onto the end of the tube, pushing the
tube into the bottom of the groove in the Male
Ferrule. Then slide the Female Ferrule down
the tubing and with your ngers, press tightly
into the Male Ferrule (reference Figure 5).
3. Firmly hand tighten the Coupling Nut onto the
tting.
Note:
Tightening with pliers may cause the Ferrules
to break.
A. USE ONLY LMI®TUBING. ALWAYS USE LMI®SUPPLIED
TUBING WITH YOUR PUMP, AS THE TUBING IS SPECIFICALLY
DESIGNED FOR USE WITH THE PUMP FITTINGS.
B. DO NOT USE CLEAR VINYL TUBING ON THE DISCHARGE
SIDE OF THE PUMP. THE PRESSURE CREATED BY THE PUMP
CAN RUPTURE VINYL TUBING.
C. BEFORE INSTALLATION, ALL TUBING MUST BE CUT WITH
A CLEAN SQUARE END.
D. 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.
DO NOT REUSE FERRULES. USE ONLY NEW FERRULES.
Replacement Ferrules, and Coupling Nuts are
available as the following kit numbers.
SECTION 2 - INSTALLATION

6Instruction Manual
SECTION 2 - INSTALLATION
2.4 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.
4-FV prevents syphoning when
pumping into a vacuum such as the
suction side of a recirculating pump
w
4-FV prevents syphoning when
pumping downhill into
low or no pressure
3. Anti-Syphon: Prevents syphoning when
pumping solution downhill or into a vacuum.
4. Back Pressure: Supplies approximately 20 psi
back pressure to prevent overpumping when
little or no system back pressure is present.
Figure 6. Typical Installations Requiring the Anti-Syphon
Feature of a Four-Function Valve

7Instruction Manual
Figure 7. Four-Function Valve Tubing
Connection
2.5 FOUR-FUNCTION VALVE
INSTALLATION
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, insert
the large opening on the Four-Function Valve
Body into the 4-FV Coupling Nut and hand tighten.
You can position the valve to have the Bleed Nut
pressure relief port in any convenient location by
tightening the 4-FV Coupling Nut with the Bleed
Nut positioned 90º CCW from desired location,
then holding the 4-FV Coupling Nut stationary
while turning the 4-FV Body the nal 90º to desired
position. 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.
THIS RETURN LINE TUBING
MUST BE SECURED TO ENSURE
PUMPED SOLUTION WILL SAFELY RETURN TO SUPPLY.
SECTION 2 - INSTALLATION

8Instruction Manual
SECTION 2 - INSTALLATION
FASTPRIMETMValve
3/8” Clear Vinyl Tubing
Figure 8. FASTPIME™ Head
2.6 FASTPRIME™
The FASTPRIME™ Head is equipped with a valve
that allows for opening the head to atmospheric
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.
2.7 AUTOPRIME™
Pumps installed with the AUTOPRIME™ Liquid
End are 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.
Figure 9. AUTOPRIME™ Liquid End Example
Discharge
Valve
AUTOPRIME
TM
Valve
Suction
Valve
Return
to Supply
Discharge
Inlet

9Instruction Manual
2.8 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.
Note:
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 ooded suction installations.
The ceramic weight, when installed, positions the
foot valve in a vertical position.
1. Attach the foot valve to one end of the
suction tubing (see Tubing Connections,
Section 2.3).
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 2.3).
Foot Valve
Tilted Sideways will not prime
INCORRECT
Use Ceramic
Weight
2.0 in. (50 mm)
for Sediment Accumulation
Return Lines
Must Not Be
Submerged
Foot Valve Must
Remain Vertical
CORRECT
SECTION 2 - INSTALLATION
Figure 10. Foot Valve / Suction Tubing Installation

10Instruction Manual
SECTION 2 - INSTALLATION
2.9 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 Female NPT tting or pipe
tee with a reducing bushing to ½” Female NPT will
accept the injection check valve. PTFE tape should
only be used on threads that are connected with
pipes.
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° 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 2.3).
Figure 11. Typical Injection Check Valve Installation

11 Instruction Manual
3.1 OUTPUT ADJUSTMENT
CONTROLS
1. Power Button: This button allows convenient
starting and stopping of the pump.
2. Mode Selection Button: For pumps with
external control capability (AD8, AD9) this
button switches pump operation between
internal and external modes. When operating
in internal mode the Pulse Indicator Light will
ash green while pumping. When operating in
external mode the Pulse Indicator Light will ash
yellow while pumping.
3. Down Button: This button reduces the stroke
speed of the pump. It will reduce the stroke
speed by 1 each time it is pressed. If this button
is held down, it will rapidly reduce the stroke
speed. When a speed of 1 stroke per minute
(SPM) is reached the speed can be further
reduced by pressing this button again to enter
stroke per hour settings.
4. Up Button: This button increases the stroke
speed of the pump. It will increase the stroke
speed by 1 each time it is pressed. If this button
is held down, it will rapidly increase the stroke
speed. When a speed of 59 strokes per hour
(SPH) is reached the speed can be further
increased by pressing this button again to enter
stroke per minute settings.
5. LCD Display: This display will show the stroke
speed of the pump. Pumps with theoretical
(AD2, AD8, AD9) or actual (AD9 when combined
with a ow meter) ow will display the ow
here.
6. Stroke Adjustment Knob: This knob provides
adjustment of the stroke length. Turning this
knob clockwise 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%.
7. Pulse Indicator Light: This light will flash
green when pumping in internal mode and will
ash yellow when pumping in external mode.
The light is on between strokes and off during
the actual stroke.
8. Low-Level Indicator Light: For units with
Single-Level Float Sensors this light will turn
red when the Low-Level Sensor registers empty.
This will turn the pump off. For units compatible
with Dual-Level Sensors (AD8, AD9) the light
will turn yellow when a low level is registered,
and red when an empty level is registered.
The pump will turn off when it registers an empty
level.
Figure 12
SECTION 3 - OPERATION

12Instruction Manual
SECTION 3 - OPERATION
9. Output, Alarm & Remote Mode Connector
(6-Pin): This connector is used for the special
functions associated with the AD9 controls.
For the AD9 this connector is associated with the
4-20ma out, Alarm Out, and Internal/ External
remote modes.
1. Alarm Out (Red/White) - Programmed as either
an Alarm Output or Internal/External mode
indicator. As an Alarm Output, pins 1 and 2
will give a closure (solid state) triggered by:
empty tank indication, input pulse error, exceed
batch error, or ow switch activation.For remote
mode indication it is open for internal mode and
closed for external.
2. Alarm Return (Red) - Return side for the above
pin 1 Alarm Out.
3. Remote Internal/External Mode (AD9)
(Green) - This pin is programmed as Internal/
External remote mode control for an AD9.
If programmed as the Internal/External control,
a closure will put the AD9 into external mode.
4. Pulse Out (AD9) (Red/Yellow) - On the AD9 this
pin gives a 100ms pulse output for each pump
stroke.
5. 4-20mA Out (AD9) (Red/Black) - On the AD9 this
pin is the positive 4-20ma output. This output
will show you 4ma when the pump is idle, 20ma
at max stroke speed.
6. Ground/Return Connection (Red / Blue) -
Common Ground
10. 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/Off Signal (Brown)
2. Ground/Return Connection (White)
3. External Pulse Signal (Blue)
4. 24V 75 mA* Power Supply (Black)
5. 4-20mA Input Signal (Green/Yellow)

13 Instruction Manual
11. Low-Level Connector (3-Pin):
This connector is for the connection of a Low-
Level Sensor (49246) or a Dual-Level Sensor
(49249). The Tank Empty input connections
are always active for all models in all functional
modes. The Tank Low input connections are
always active for models equipped with dual
level functionality (AD8, AD9). If the uid level
drops below the top float on a Dual-Level
Sensor, the Low-Level Indicator Light will turn
yellow. If the uid level drops below the oat on a
Low-Level Sensor, or the bottom oat on a Dual-
Level Sensor, the Low-Level Indicator Light will
turn red, and the pump will stop. The pump is
designed to recognize an open circuit as full and
a closed circuit as low or empty. There is a ve
second delay between triggering the sensor,
and the pump’s reaction. This is intended to
avoid triggering during relling your supply tank.
The pin functions are as follows:
1. Tank Empty Signal
3. Tank Low Signal
4. Ground/Return Connection
12. Flow Monitor / Meter Connector (4-Pin):
This connector will be used with a Milton Roy
ow meter or the Milton Roy DIGI-PULSE™ ow
monitor (FM-ROY-9). The pin functions are as
follows:
1. Flow Meter In – A closure between this pin
and ground registers a pulse for the flow
meter/monitor.
2. 24 Volt 75 mA* Supply – Supply voltage for a
Milton Roy ow meter.
3. Ground/Return Connection – Common ground
4. Flow Meter Sense – The condition of this pin will
set the pump into the Digipulse or Flow Meter
mode. This will automatically occur when the
Milton Roy device is connected. A connection to
ground indicates the use of a ow meter, while
an open circuit indicates a ow monitor.
Note:
The total current output of the 5-pin and 4-pin
connectors should not exceed 75 mA.
SECTION 3 - OPERATION