AGRI-INJECT mRoy A/P Series User manual

Operating Manual
Fertigation System, mRoy A, P, B
Fluid Injection System
Manual Part Number: Man-882-003
Models in Manual: 882-34-111018-0, 882-34-111030-0, 882-34-141118-0, 882-34-141518-0, 882-34-141218-0
882-21-111018-0, 882-21-111030-0, 882-21-141118-0, 882-21-141518-0, 882-21-141218-0
882-12-111018-0, 882-12-111030-0, 882-12-141118-0, 882-12-141518-0, 882-12-141218-0
882-34-141330-0, 882-34-141930-0, 882-34-141430-0, 882-34-114085-0, 882-34-144885-0
882-21-141330-0, 882-21-141930-0, 882-21-141430-0, 882-21-114085-0, 882-21-144885-0
882-12-141330-0, 882-12-141930-0, 882-12-141430-0, 882-12-114085-0, 882-12-144885-0
Revision Level: C
Revision Date: July 25, 2022
Please carefully read these operating instructions before use. Do NOT discard.
The operator shall be liable for any damage caused by installation or operating error(s).
The latest version of the operating instructions as well as any addendums and/or supplemental instructions are available
at www.agri-inject.com.

Operating Instructions: mRoy A, P, or B Fertigation System 1
1.0 TABLE OF CONTENTS
1.0 TABLE OF CONTENTS 1
2.0 OPERATOR’S MANUAL ADVISORY 3
2.1 SUPPLEMENTARY INFORMATION 3
2.2 TERMS & CONDITIONS 3
3.0 GENERAL SYSTEM ADVISORY 4
3.1 ABOUT THIS SYSTEM 4
3.2 IDENTITY CODE 5
3.3 WARNING! 6
3.4 TRAINING 6
3.5 USE CAUTION! RESPECT PRESSURE LIMITATIONS! 6
3.6 TUBING AND PLUMBING 7
3.7 INSPECTION 7
3.8 IMPORTANT 7
3.9 DISASSEMBLY AND SERVICE 7
3.10 PUMPING DANGEROUS LIQUIDS 8
3.11 DEFINITIONS 9
4.0 SAFETY 10
4.1 IDENTIFICATION OF SAFETY NOTES 10
4.2 WARNING SIGNS DENOTING DIFFERENT TYPES OF DANGER 10
4.3 INTENDED USE 11
4.4 SAFETY INFORMATION 11
4.5 INFORMATION IN THE EVENT OF AN EMERGENCY 13
4.6 QUALIFICATION OF PERSONNEL 13
5.0 STORAGE, TRANSPORT AND UNPACKING 15
5.1 SAFETY INFORMATION 15
5.2 UNPACKING 15
5.3 STORAGE 15
5.4 TRANSPORTATION 15
6.0 PRE-INSTALLATION 16
6.1 PROTECTIVE CLOTHING 16
6.2 TEST FLUIDS 17
6.3 TUBING CONNECTIONS 17
6.4 ELECTRICAL CONNECTIONS 17
6.5 PLUMBING CONNECTIONS 17
6.6 AGRICULTURAL APPLICATIONS 18

Operating Instructions: mRoy A, P, or B Fertigation System 2
6.7 OTHER APPLICATIONS 20
6.8 CHEMICAL DISPOSAL 20
6.9 MIXING CHEMICALS 21
7.0 INSTALLATION 22
7.1 SAFETY 22
7.2 LIQUID SUPPLY TANK 22
7.3 SYSTEM LOCATION 23
7.4 DISCHARGE PLUMBING CONNECTIONS 23
7.5 SUCTION PLUMBING CONNECTIONS 25
7.6 ELECTRICAL CONNECTIONS 26
7.6.1 WIRE COLOR AND PHASING 28
7.6.2 MOTOR ROTATION 28
7.6.3 ROTARY PHASE GENERATOR POWER SUPPLY 28
8.0 OPERATION 30
8.1 SAFETY 30
8.2 SAFETY EQUIPMENT 32
8.3 OPERATING EQUIPMENT 32
8.4 APPLYYOURSELF APP 33
8.5 FILLING THE PUMP WITH OIL 33
8.6 STARVED SUCTION 35
8.7 PRIMING THE INJECTION PUMP 36
8.8 CALIBRATING THE INJECTION PUMP 36
8.8.1 SIMPLIFIED METHOD (calibration result in gallons per hour) 37
8.8.2 TRADITIONAL METHOD (calibration result in minutes) 38
8.9 SYSTEM OPERATION 39
9.0 POST OPERATION 42
9.1 SAFETY 42
9.2 SAFETY EQUIPMENT 42
9.3 FLUSHING THE SYSTEM 42
9.4 STORAGE 43
10.0 MAINTENANCE 45
10.1 SAFETY 45
10.2 PERIODIC AND PREVENTIVE MAINTENANCE 45
10.3 PARTS REPLACEMENT 48
11.0 mRoy A PARTS BREAKDOWN 51
12.0 INSTALLATION AND PIPING APPENDIX 60
13.0 END USER WARRANTY 64

Operating Instructions: mRoy A, P, or B Fertigation System 3
2.0 OPERATOR’S MANUAL ADVISORY
2.1 SUPPLEMENTARY INFORMATION
There may be additional instructions/information beyond this manual that are included with this
manual AND/OR available on our website. Such instructions are very important and must be read
prior to the installation or operation of this injection system.
2.2 TERMS & CONDITIONS
Agri-Inject®reserves the right to alter, correct, and/or improve the technical documentation and the
products described in the technical documentation at its own discretion and without giving prior
notice, insofar as this is reasonable for the user. The same applies to any technical changes that
serve the purpose of technical progress.
The receipt of technical documentation does not constitute any further duty on the part of
Agri-Inject®to furnish information concerning modifications to products and/or technical
documentation. The user is responsible to verify the suitability and intended use of the products in
your specific application, in particular with regard to observing applicable standards and
regulations. All information made available in the technical data is supplied without any
accompanying guarantee, whether expressly mentioned, implied, or tacitly assumed.
In general, the provisions of the current standard Terms and Conditions of Agri-Inject®apply
exclusively, in particular as concerns any warranty liability.
This manual, including all illustrations contained herein, is copyright protected. Any changes to the
contents or the publication of extracts of this document is prohibited.
Agri-Inject®reserves the right to register its own intellectual property rights for the product
identifications of Agri-Inject®products that are used here. Registration of such intellectual property
rights by third parties is prohibited.
Questions or Comments?
Please call us at 1-800-446-5328 (USA) or 1-970-848-5336 (International) or visit us on the web at
www.agri-inject.com.

Operating Instructions: mRoy A, P, or B Fertigation System 4
3.0 GENERAL SYSTEM ADVISORY
3.1 ABOUT THIS SYSTEM
You are now the owner of one of the most advanced crop management tools available today.
The Fertigation System you have purchased is designed to deliver precise amounts of liquid
fertilizer or other chemicals into the water flowing through your irrigation system. The mRoy A, P,
and B Fertigation Systems are very versatile tools. Available in simplex (one head) and duplex (two
heads), mRoy A, P, and B Fertigation Systems are used for spoon feeding fertilizers, applying low
application rate chemicals, applying two products at once, applying very high application rate
fertilizers, injecting acids for water improvement, and many other combinations of chemical and
fertilizer applications.
When you invested in the mRoy A, P, or B Fertigation System, you acquired a complete injection
system - everything you need to get started. Easy to install and simple to operate, your mRoy A, P,
or B Fertigation System can be integrated into your center pivot, linear, greenhouse, or drip
irrigation system with a minimum of work, tools, and effort.
The heart of your mRoy A, P, or B Fertigation System is the injection pump. This high quality pump
is designed specifically to predictably, accurately, and reliably inject up to 170 gallons per hour of
liquid, making mRoy A, P, and B Fertigation Systems very robust multiple chemical and fertilizer
injection systems. The mRoy A, P, and B Fertigation Systems also feature our patented Mister
Mist’r®injection check valve. The Mister Mist’r®releases fertilizer or chemical in four directions in
the middle of the irrigation pipe for complete mixing. The injected liquid is atomized into tiny
droplets for complete suspension and homogenous distribution through your irrigation system. As
a regulatorally approved check valve, the Mister Mist’r®protects against backflow of fertilizers or
chemicals into the water supply, or leakage of water into the supply tank. In combination, the very
reliable injection pump and the exclusive Mister Mist’r®assure accurate, uniform, safe distribution
of fertilizers and other liquids to your crops.
Like all Agri-Inject®products, your mRoy A, P, or B Fertigation System is built with quality materials
and designed to give you worry-free, low maintenance operation so you can fully benefit from the
cost savings and production enhancements that fluid injection offers.
When properly installed and operated, mRoy A, P, or B Fertigation System will give you many years
of safe, dependable operation, providing greater management over your farm and putting dollars in
your pocket along the way. This owner’s manual is designed to help you get optimum performance
and reliability from this quality fluid injection system.
If you have any questions about your mRoy A, P, or B Fertigation System or any other of our quality
fluid injection systems, please contact your local Agri-Inject®dealer, visit us on our website at
www.agri-inject.com or give us a call at 1-800-4-INJECT (800-446-5328).
Above all, thank you for your business. We are dedicated to helping growers like you around the
world increase efficiency, optimize plant health, and foster environmental stewardship through the
use of fluid injection technology.

Operating Instructions: mRoy A, P, or B Fertigation System 5
3.2 IDENTITY CODE
Product Category: Fertigation System
882
Fertigation System product line designation
-
Dash separator
Input Power Option
11
Single Phase 110V AC
12
Single Phase 220V AC
21
12V DC
32
Three Phase 230V AC
34
Three Phase 480V AC
-
Dash separator
Control Option
0
No control switch, no cord
1
One control switch
2
Power cord only, 12 ft (3.7m); no control switch
7
No switch; Reflex cord end; Reflex lower bracket
Plumbing Assembly Option
0
Suction hose barb only
1
Simplex Ball Valve and Strainer (BV&S)
2
Simplex BV&S with calibration tube port
Mister Mist’r Option
0
Discharge hose barb only
1
Yellow Ultra Mister Mist’r (Polypropylene)
2
Black Ultra Mister Mist’r (PVDF)
4
Alpha Mister Mist’r (316 SS)
5
Alpha Mister Mist’r (CPVC)
Pump Size
018:mRoy P18 030:mRoy A30 218:mRoy P2.5x18
518:mRoy P5.6x18 118:mRoy P18x18 430:mRoy A4.4x30
930:mRoy A9.4x30 330:mRoy A30x30
085:mRoy B85 885:mRoy B85x85
-
Dash separator
Liquid Compatibility
0
Standard (for most fertilizers and many chemicals)
1
Sulfuric and phosphoric acid ready
882
-
34
-
1
1
1
030
-
0
Please provide the model code and serial number for your dealer to properly order spare parts or arrange for
service on this system. This enables the unit definition and version to be clearly identified.

Operating Instructions: mRoy A, P, or B Fertigation System 6
3.3 WARNING!
For your safety, the safety of others, and to prevent a risk of serious injury to yourself and others,
before you install, use, or service an Agri-Inject®system:
READ THIS MANUAL!
This manual (and its addendums, including supplementary information) provides you with warnings,
instructions for installation, use, and servicing safety practices. Read such information thoroughly
before you install, use or service an Agri-Inject®system and follow all of the warnings and
instructions it contains.
An Agri-Inject®system should be installed, used, or serviced ONLY by those who are thoroughly
familiar with the instructions and warnings contained in this document. Improper use or disregard
for warnings, instructions, and basic safety practices can create a risk of serious bodily injury to you
or a bystander and/or property damage.
3.4 TRAINING
Do not install, operate, or service an Agri-Inject®system unless you have been properly trained to
do so.
3.5 USE CAUTION! RESPECT PRESSURE LIMITATIONS!
The mRoy A, P, or B Series metering pump provided with your mRoy A, P, or B Fertigation System
has output pressure limitations. mRoy A, P, and B pumps have adjustable internal pressure relief
systems. The adjustable mRoy A, P, or B pressure relief system is designed to protect components
downstream from the pump; extreme caution must be used when adjusting the pressure relief
system.
mRoy A, P, and B pumps are capable of pumping against very high pressures. The lower
flow pumps have pressure ratings up to 2000 psi. Any of the mRoy A, P, or B can easily
generate enough pressure to cause catastrophic failure of discharge fittings, discharge
hoses, and injection check valves presenting a very hazardous situation. The pressure relief
systems on Agri-Inject mRoy A ,P, and B injection systems are factory set to relieve between
100 and 120 psi discharge pressure. This relief setting is compatible with the discharge
plumbing supplied with the system. Never adjust mRoy A, P, or B pressure relief systems
without previous training, consultation with Agri-Inject, and careful consideration of
downstream plumbing component pressure limitations
Pivots with large topographical changes, irrigation wells sited some distance from the irrigation
system, and irrigation systems some elevation above the irrigation pump (e.g. a pivot on a bluff
above a pump at the river below) are all examples of situations that often present water pressures
far exceeding the pressure stated on the pivot nozzle chart. Water pressure exceeding 100-120 psi
will cause the pressure relief system to bypass and the pump to under pump or not pump at all. If
there is any question at all concerning irrigation water pressure, install an accurate
pressure gauge at the point of injection to ensure safe operating pressure. If the irrigation
water pressure exceeds 100-120 psi and the pump under-performs, consult with Agri-Inject
before attempting to adjust the pressure relief system.

Operating Instructions: mRoy A, P, or B Fertigation System 7
The maximum output pressure capability of your mRoy A, P, or B Fertigation System will most likely
be determined by the working pressure rating of the discharge hose. By design, the discharge hose
provided with your mRoy A, P, or B Fertigation System is the weakest link in the system.
Working pressures of typical mRoy A, P, and B Fertigation System discharge hoses:
Hose Type and Size
Maximum Operating
Pressure
Typical System Application
Rubber polyethylene lined
hoses, 1/4“, 3/8“, and 1/2“ ID
175 PSI at 70º F (12.1 bar at
21º C)
Low flow mRoy P pumps in
acid, chemical, and fertilizer
service
Coated and braided PVC
hose, 1/2“ ID
250 PSI at 68º F (17.2 bar at
20º C)
mRoy A, P and B pumps 18
gallons per hour and higher
3.6 TUBING AND PLUMBING
Always use proper tubing or plumbing when connecting an Agri-Inject®system. The working
pressure rating, temperature rating, and chemical compatibility must be compatible with the pump
output and the liquid being pumped. Agri-Inject®provides tubing and plumbing with its systems.
However, they may not necessarily be proper for the particular use to which you put the system.
Our support staff will be happy to assist with discussing application and compatibility issues.
3.7 INSPECTION
Always check to see that the system’s fittings are tight and free of leaks.
3.8 IMPORTANT
Do NOT install, operate or service this system unless you have thoroughly read all warnings and
instructions in the manual. Do NOT install, operate or service this system until you have been
properly trained. Always use fittings and tubing that is properly rated and compatible with pump
output and the pumped liquid. Always follow the specimen label of any chemical being injected by
this system. The label is the law.Always check to see that fittings and tubing connections are
tight and free of leaks. Always disconnect the electrical power cord before you disassemble or
otherwise service this system. Always relieve the pressure and drain the suction lines before you
disassemble or otherwise service this system. Never disconnect the discharge or suction lines
while the pump is operating and/or the lines are under pressure.
3.9 DISASSEMBLY AND SERVICE
Always disconnect the electrical power cord before you disassemble or otherwise service this
system. Never open the electrical components of the system without first disconnecting the
electrical power cord and any other communication connections. Never disconnect discharge or
suction lines from the system while the pump and/or lines are under pressure. Never disconnect
discharge or suction lines from the system while the pump is operating. Always disconnect the
electrical power cord, relieve the pressure in the discharge and/or suction lines, and drain the lines
before disassembly or other service.

Operating Instructions: mRoy A, P, or B Fertigation System 8
3.10 PUMPING DANGEROUS LIQUIDS
When the system is used to inject dangerous liquids, you face risks of harm to yourself and others
from the dangerous liquids and/or the impact of those dangerous liquids. Personal injury and/or
property damage can result from contact with the dangerous liquids from spray, splash, fumes, or
vapors. Damage can also result from the impact of the misapplication of such dangerous liquids.
If the system is used to pump dangerous liquids, in addition to heeding the warnings already set
forth, you must also:
● Always avoid bodily contact with dangerous liquids. Use the Personal Protective Equipment
(PPE) recommended in the SDS, Specimen Label, or other data provided by the dangerous
liquid supplier/manufacturer.
● Take great caution to ensure dangerous liquids do not cause damage to local property or
equipment.
● Always heed the warnings, follow the instructions, and take whatever precautions the supplier
of the dangerous liquid has provided you.
● Never operate the pump if the fittings or tubing connections are not tight and/or free from
leaks.
● Always drain the discharge line before disassembly.
● Always fully drain and flush the supply tank with water before adding another chemical.
● Always flush the pump with water after injecting a dangerous liquid and before adding another
to avoid a potentially hazardous chemical reaction.
● Consider installing a supplementary back pressure valve in the discharge line between the
discharge check valve and the injection check valve. See Section 12.0 INSTALLATION
AND PIPING APPENDIX.