AGRI-INJECT MacRoy G Series User manual

Operating Manual
Fertigation System, MacRoy G
Fluid Injection System
Manual Part Number: Man-882-001
Models in Manual: 882-34-111055-0, 882-34-111110-0, 882-34-114150-0
882-21-111055-0, 882-21-111110-0, 882-21-114150-0
882-12-111055-0, 882-12-111110-0, 882-12-114150-0
Revision Level: C
Revision Date: July 13, 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: MacRoy G 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: MacRoy G Fertigation System 2
6.7 OTHER APPLICATIONS 20
6.8 CHEMICAL DISPOSAL 20
6.9 MIXING CHEMICALS 20
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 27
7.6.2 MOTOR ROTATION 28
7.6.3 ROTARY PHASE GENERATOR POWER SUPPLY 28
8.0 OPERATION 29
8.1 SAFETY 29
8.2 SAFETY EQUIPMENT 31
8.3 OPERATING EQUIPMENT 31
8.4 PRIMING THE INJECTION PUMP 32
8.5 CALIBRATING THE INJECTION PUMP 33
8.5.1 SIMPLIFIED METHOD (calibration result in gallons per hour) 34
8.5.2 TRADITIONAL METHOD (calibration result in minutes) 34
8.6 SYSTEM OPERATION 35
9.0 POST OPERATION 37
9.1 SAFETY 37
9.2 SAFETY EQUIPMENT 37
9.3 FLUSHING THE SYSTEM 37
9.4 STORAGE 38
10.0 MAINTENANCE 40
10.1 SAFETY 40
10.2 PERIODIC AND PREVENTIVE MAINTENANCE 40
10.3 PARTS REPLACEMENT 42
11.0 MacRoy G 55 PARTS BREAKDOWN 44
12.0 MacRoy G 110 PARTS BREAKDOWN 52
13.0 MacRoy G 150 PARTS BREAKDOWN 60
14.0 INSTALLATION AND PIPING APPENDIX 68
15.0 END USER WARRANTY 72

Operating Instructions: MacRoy G 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: MacRoy G 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 MacRoy G
Fertigation System is a versatile tool. While MacRoy G Fertigation Systems are primarily designed
to inject fertilizer, they are often used to apply fumigants, acid products, certain biocides, and other
higher application rate products.
When you invested in the MacRoy G Fertigation System, you acquired a complete injection system
- everything you need to get started. Easy to install and simple to operate, your MacRoy G
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 MacRoy G Fertigation System is the injection pump. This high quality pump is
designed specifically to predictably, accurately, and reliably inject up to 150 gallons per hour of
liquid, making MacRoy G Fertigation Systems the most robust higher volume fertilizer injection
systems available. The MacRoy G Fertigation System also features 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 MacRoy G Fertigation System 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, your MacRoy G 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 MacRoy G 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: MacRoy G 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
055
MacRoy G 55, 55 gallons per hour max
110
MacRoy G 110, 110 gallons per hour max
150
MacRoy G150, 150 gallons per hour max
882
-
34
-
1
1
1
055
- 0

Operating Instructions: MacRoy G Fertigation System 6
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.
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 MacRoy G Series metering pump provided with your MacRoy G Fertigation System has output
pressure limitations. MacRoy G pumps do not have internal pressure relief systems. The MacRoy
G Series diaphragms are designed to absorb small, short duration pressure spikes; they are not
designed to operate for any extended time at pressures exceeding their pressure rating.
If a MacRoy G pump is installed on an irrigation system with water pressure approaching or
exceeding the pump rating, the pump diaphragm and/or the diaphragm seal may fail
catastrophically. When the diaphragm or the diaphragm seal fails, the pump will squirt
liquid out around the pump head in all directions with a very high force and for distances
exceeding 20 feet presenting a very hazardous situation.
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. 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.

Operating Instructions: MacRoy G Fertigation System 7
MacRoy G Fertigation Systems have the following pressure limitations:
MacRoy G Fertigation System
Maximum Operating Pressure
G55
150 PSI (10.34 bar)
G110
150 PSI (10.34 bar)
G150
100 PSI (6.89 bar)
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: MacRoy G 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 14.0 INSTALLATION
AND PIPING APPENDIX.

Operating Instructions: MacRoy G Fertigation System 9
3.11 DEFINITIONS
The following terms are used in this manual and in the context of this scope of work, the following
definitions should be applied.
Term
Meaning
Bleeder Valve
The valve assembly commonly provided with Mister Mist’r ®Injection Check
Valves that allows for the bleeding of air from the discharge plumbing on startup
and for relieving line pressure after shut down.
Calibration
The process of ensuring an injection pump discharges the proper amount of
liquid per unit of time, e.g., gallons per minute.
Calibration Tube
A calibrated tube that may be purchased for use with a MacRoy G Fertigation
System that is used to measure injection volume over time.
Carrier
A liquid in which feed chemicals are mixed. Examples include water and crop
oil.
Fertigation
The application of fertilizers or other higher application rate chemicals to a crop
through injection through the irrigation system
Feed Chemical
The fertilizer or chemical being injected.
Injection Quill
A device at the end of the discharge line from the pump that connects to the
irrigation pipe and distributes feed chemicals into the irrigation water. Nearly all
regulations call for the injection quill to have a spring-loaded check valve
integrated into the quill. In this case, it can also be called an injection check
valve. The Agri-Inject®provided injection quill is the Mister Mist’r ®.
Jar Test
A method of testing the compatibility and suitability of a mixture of chemicals
and carrier prior to mixing them in the tank.
Liquid End
The head, diaphragm, and check valves of a pump, i.e., the part of the pump
that ‘pumps the liquid’
Percent Knob
The knob on the right side of a MacRoy G Pump. This knob adjusts the pump
stroke length and is calibrated in percent. Pump output is the maximum rated
gallons per hour of the pump multiplied by the percent setting of the percent
knob.
Liquid Supply Tank
The tank or vessel provided by the user for the temporary storage of the
fertilizer or chemical injected by the MacRoy G Fertigation System. Typically
over 1000 gallons, supply tanks are sometimes portable, but are often
permanently installed.
Mister Mist’r ®
The patented injection check valve provided by Agri-Inject® for use on
Agri-Inject® fertilizer and chemical injection systems. (see Injection Quill above)
Specimen Label
The label provided with all approved agricultural feed chemicals

Operating Instructions: MacRoy G Fertigation System 10
4.0 SAFETY
4.1 IDENTIFICATION OF SAFETY NOTES
The following signal words are used in these operating instructions to denote different severities of
danger:
Signal Word
Meaning
WARNING
Denotes a possibly dangerous situation. If this is disregarded, you are in a life
threatening situation and this can result in serious injuries
CAUTION
Denotes a possibly dangerous situation. If this is disregarded, it could result in slight or
minor injuries or material damage.
DANGER
Denotes a possibly dangerous situation. If this is disregarded, a situation may exist that
will present dangers of injury to personnel or severe damage to equipment or the
environment.
4.2 WARNING SIGNS DENOTING DIFFERENT TYPES OF DANGER
The following signal words are used in these operating instructions to denote different severities of
danger:
Warning Signs
Type of danger
Warning - Automatic Start-Up
Warning - High-Voltage
Warning - Danger Zone

Operating Instructions: MacRoy G Fertigation System 11
4.3 INTENDED USE
Only use this system to meter and inject liquid feed chemicals. Only use this system to inject
chemicals that are below the maximum viscosity supported by the pump. Only use the system
after it has been correctly installed and started up in accordance with the technical data and
specifications contained in the operating instructions. Observe the general limitations with regard
to viscosity limit, chemical resistance, and density. A chemical resistance chart is available at
www.agri-inject.com. All other uses or modifications are prohibited. The injection pump is not
intended for the metering of gaseous media or solids. The injection pump is not intended for the
metering of flammable or explosive media. The system is not intended for operation in areas at risk
from explosion. The system should only be operated by trained and authorized personnel. See
Section 4.6 QUALIFICATION OF PERSONNEL. You are obliged to observe the information
contained in the operating instructions at the different phases of the unit’s service life
4.4 SAFETY INFORMATION
WARNING!
Warning about personal and material damage
The injection system can start to pump as soon as it is connected to the main voltage OR at such a time that the irrigation
system starts up. Ensure that the control switches are set to the OFF positions before servicing the machine.
WARNING!
Danger of electric shock
Main voltage exists in the switch enclosure and in the pump wiring box. When handling this system or making any wiring
connections, disconnect the main power. If there is damage to any of these components, disconnect it from the main power
immediately and only return to service after an authorized repair has been made.
WARNING!
Warning of a dangerous or unknown feed chemical leak
Should a dangerous or unknown feed chemical be used, it may escape from the wetted fittings/tubing when working on the
system. Take appropriate measures before working on the system (e.g. proper PPE, consult label or SDS of the chemical).
Drain and flush all the plumbing before working on the system
WARNING!
Danger from hazardous substances
Possible consequence: Fatal or very serious injury
Please ensure that when handling hazardous substances that you have read the latest safety data sheets provided by the
manufacturer of the hazardous substance. The actions required are described in the Safety Data Sheet (SDS). Check the
SDS regularly and replace, if necessary, as the hazard potential of a substance can be re-evaluated at any time based on
new findings. The system operator is responsible for ensuring these SDS sheets are kept up to date, as well as for
producing an associated hazard assessment for the work areas affected.
WARNING!
Danger to environment and personnel due to improper chemical disposal
The operator should follow all rules and regulations from local, regional and federal agencies as well as any directives from
the feed chemical label concerning proper disposal of excess chemical and used chemical containers.
WARNING!
Always follow the chemical label
The system operator should always consult the specimen label of the chemical being pumped before making the
application. Ensure that the target crop, target pest, application rate, and application method are all in compliance with the
label prior to injecting said chemical. The label is the law! Fines and punishment could result from off-label application
WARNING!
Warning of feed chemical spray during disconnection
Feed chemicals can spray out of the discharge hose if they are manipulated or opened due to pressure in the pump head
and adjacent parts of the system. Disconnect the pump from the main power supply and ensure it cannot be switched on
again by unauthorized personnel. Depressurize the system before commencing any work on wetted parts.

Operating Instructions: MacRoy G Fertigation System 12
WARNING!
Warning of feed chemical spray due to piping blockage
The metering pump can generate extreme pressure. Discharge fittings/tubing can rupture if the discharge line is blocked.
Ensure that the hose and injection check valve (Mister Mist’r®) is clear before pumping.
Ensure that the suction filter is clean and the filter element is installed properly and in good shape before pumping.
WARNING!
Warning of feed chemical spray due to material compatibility
An unsuitable feed chemical can damage the wetted parts of the system.
Take into account the resistance of the wetted materials when selecting the chemical to be pumped. Visit
www.agri-inject.com for a chemical resistance chart.
CAUTION!
Danger of injury to personnel and material damage
The use of untested, non-conforming, third-party components can result in injury to personnel and material damage. Only fit
parts to this system that have been tested and approved by Agri-Inject®.
CAUTION!
Danger from incorrect operation or poor maintenance
Danger can arise from this system due to incorrect operation and poor maintenance. Ensure operators are familiar with this
manual and have access to SDS and specimen labels. Adhere to good maintenance practices.
CAUTION!
Warning against illegal operation
Observe the regulations (local, state, federal) that apply where the system is installed.
CAUTION!
Lifting Hazard
System is heavy. Single person lift could cause injury. When necessary, use assistance when moving or lifting.
DANGER!
Danger of property and/or equipment damage
The use of feed chemicals and/or feed chemical mixtures which are too viscous, laden with particles, or otherwise not
suitable for mixing and/or pumping can cause damage to the pumping system. Always follow feed chemical specimen label
recommendations for pumping and mixing AND follow the limitations set forth in this operator’s manual.
DANGER!
Danger of environmental damage or contamination
The use of this system without the recommended and proper backflow, check valve, and control interlock provisions can
result in improper operation of the equipment resulting in unintended contamination of water supplies. Always follow local,
state, and federal laws, codes, and regulations; specimen label recommendations; and operator’s manual recommendations
for proper installation and operation of fluid injection equipment.
WARNING!
Only return systems for repair in a cleaned state and with flushed discharge and suction plumbing
Ensure systems are cleaned thoroughly, flushed multiple times with water, and fully drained prior to sending or delivering the
system to a service location. This protects the transportation company as well as the service provider from dangerous or
hazardous chemicals.
CAUTION!
Danger of material damage
This system can be damaged by incorrect or improper storage or transportation. The system should only be stored or
transported in a well packaged state. The packaged system should also only be stored or transported in accordance with the
stipulated storage conditions. The packaged system should be protected from moisture and the ingress of chemicals.

Operating Instructions: MacRoy G Fertigation System 13
4.5 INFORMATION IN THE EVENT OF AN EMERGENCY
In an emergency, disconnect the main power, turn the system switch to OFF, or disconnect the
main power supplying power to the injection system.
If feed chemical escapes or is spilled, ensure that the pressure on the discharge side of the pump
is relieved, all tank valves are closed, and adhere to the chemical Safety Data Sheet (SDS) for
proper cleanup and disposal.
For chemical poisoning, call 911 if the person is unconscious, has trouble breathing, has
convulsions, or is otherwise showing life threatening signs. Otherwise, call Poison Control at
1-800-222-1222.
For chemical spills, CHEMTREC provides access to technical experts on chemical products and
hazardous materials and maintains a large database of Safety Data Sheets (SDS). CHEMTREC
can be reached at 1-800-262-8200.
4.6 QUALIFICATION OF PERSONNEL
Task
Qualification
Storage, transport, unpacking
Instructed person
Assembly
Technical personnel, service
Planning the installation
Qualified personnel who have a thorough knowledge of metering
pumps and injection systems
Installation
Technical personnel, service
Installation, electrical
Electrical technician
Operation
Instructed person
Maintenance, repair
Technical personnel, service
Decommissioning, disposal
Technical personnel, service
Troubleshooting
Technical personnel, electrical service, instructed person, service
Explanation of the table:
Qualified Personnel
A qualified person is deemed to be a person who is able to assess the tasks assigned to him and
recognize possible dangers based on his/her technical training, knowledge and experience, as well
as knowledge of pertinent regulations. A qualification of equal validity can also be gained by
several years of employment/experience in the relevant field of work.

Operating Instructions: MacRoy G Fertigation System 14
Electrical technician
An electrical technician is able to complete work on electrical systems and recognize and avoid
possible dangers independently based on his/her technical training and experience, as well as
knowledge of pertinent standards and regulations.
The electrical technician should be specifically trained for the working environment in which he/she
is employed and know the relevant standards and regulations.
An electrical technician must comply with the provisions of the applicable statutory directives on
accident protection.
IN NO WAY does an electrical technician substitute for a Licensed Electrician and should NOT
perform any function that must/should legally be performed by a Licensed Electrician.
Instructed person
An instructed person is deemed to be a person who has been instructed and, if required, trained in
the tasks assigned to him/her and possible dangers that could result from improper actions, as well
as having been instructed in the required protective equipment and protective measures.
Service
The service designation refers to service technicians who have received proven training and have
been authorized by Agri-Inject®to work on the system.

Operating Instructions: MacRoy G Fertigation System 15
5.0 STORAGE, TRANSPORT AND UNPACKING
5.1 SAFETY INFORMATION
CAUTION!
Danger of material damage
This system can be damaged by incorrect or improper storage or transportation. The system should only be stored or
transported in a well packaged state. The packaged system should also only be stored or transported in accordance with the
stipulated storage conditions. The packaged system should be protected from moisture and the ingress of chemicals.
CAUTION!
Lifting Hazard
System is heavy. Single person lift could cause injury. When necessary, use assistance when moving or lifting.
WARNING!
Only return systems for repair in a cleaned state and with flushed discharge and suction plumbing
Ensure systems are cleaned thoroughly, flushed multiple times with water, and fully drained prior to sending or delivering the
system to a service location. This protects the transportation company as well as the service provider from dangerous or
hazardous chemicals.
5.2 UNPACKING
Compare the packing list with the delivered system. The system should be equipped with a startup
kit. Ensure that there is no damage to the system as a result of freight transportation. Report any
damage immediately to the freight company. Properly dispose of all packing materials.
5.3 STORAGE
Storage should be indoors in a clean, dry, protected area free from rodents and excessive insects.
If the storage area is susceptible to freezing conditions, ensure that the system has been properly
winterized by pumping a safe antifreeze solution through the system. Agri-Inject®recommends
windshield washing solvent with a minus 20 degree fahrenheit (or colder) rating.
5.4 TRANSPORTATION
Ensure the system is tied down and secured during transportation. Extreme bumps and sliding
around may damage suction and discharge plumbing components. Never lift the system by
grabbing suction plumbing components.

Operating Instructions: MacRoy G Fertigation System 16
6.0 PRE-INSTALLATION
6.1 PROTECTIVE CLOTHING
WARNING!
Warning of a dangerous or unknown feed chemical
Should a dangerous or unknown feed chemical be used, it may escape from the wetted fittings/tubing when working on the
system. Take appropriate measures before working on the system (e.g. proper PPE, consult label or SDS of the chemical).
Drain and flush all the plumbing before working on the system
Always wear the proper Personal Protective Equipment (PPE) when working on or near this
MacRoy G Fertigation System system. PPE can include the following:
PPE Category
Typical PPE Items
Eye and Face Protection
Goggles with side shields
Face shield
Hand Protection
Gloves (hand)
Gloves (lower arm)
Body Protection
Protective suit
Shoe/boot covers
Respiratory
Face mask
Respirator
Precautions should be taken dependent on the chemical being used. You should ALWAYS consult
the Safety Data Sheet (SDS) of the chemical being used to determine the type of PPE to be used.
Refer to the following chart to order safety supplies. Consult your local Agri-Inject®
dealer/distributor for pricing.
Description
Quantity
Part Number
Latex Gloves
1 box (144 gloves)
419-15-000000-0
Protective Suit
1
419-15-000001-0
Boot Covers
1
419-15-000002-0
Safety Glasses
1
419-15-000003-0
Face Guard
1
419-15-000004-0

Operating Instructions: MacRoy G Fertigation System 17
6.2 TEST FLUIDS
All MacRoy G Fertigation Systems are fully tested before leaving the factory. Agri-Inject®uses
windshield washing solvent when testing and some of this liquid is normally present within the
suction fittings and pump head assembly. If the intended feed chemical is not compatible with this
solvent, flush the system with water and turn on the pump briefly to clear the liquid from the pump
head prior to filling the system with feed chemical.
6.3 TUBING CONNECTIONS
Suction and discharge tubing or pipe sizes must not be reduced. Make certain that all tubing/hose
is securely fastened and tight prior to startup. Always use Agri-Inject®supplied tubing with your
MacRoy G Fertigation System, as these supplies are designed for maximum compatibility with the
system operation.
Refer to the following table to order replacement tubing and hose kits. Consult your local dealer for
pricing.
Description
Quantity
Part Number
Discharge hose kit,Black Braided
PVC, 1/2” ID,1/2” tube connector,
12 ft. (for G55)
1
849-07-016016-0
Discharge hose kit,Black Braided
PVC, 1/2” ID,1/2” tube connector,
20 ft. (for G55)
1
849-07-016016-1
Discharge hose kit,Black Braided
PVC, 1/2” ID, No fittings, Hose
clamps only, 12 ft. (for G110 &
150)
1
849-08-016000-0
Discharge hose kit,Black Braided
PVC, 3/4” ID, No fittings, Hose
clamps only, 12 ft. (for G110 &
150)
1
849-08-024000-0
Bleeder valve tubing, 3/16”
1
260-02-250150-0
6.4 ELECTRICAL CONNECTIONS
All wiring diagrams should be consulted and followed to reduce the risk of electrical shock. It is
strongly recommended that the electrical installation be performed, supervised, or approved by a
Licensed Electrician. See Section 7.6.1 WIRE COLOR AND PHASING.
6.5 PLUMBING CONNECTIONS
Always adhere to your local plumbing codes as well as regional and national regulations for
chemical injection. Agri-Inject®is not responsible for improper installation. Copies of state and
local regulations can be found at www.agri-inject.com. It is the responsibility of the user, however,

Operating Instructions: MacRoy G Fertigation System 18
to ensure that the installation is in compliance with the most current code. Agri-Inject®makes no
guarantee that such posted regulations are entirely up to date.
6.6 AGRICULTURAL APPLICATIONS
Always follow guidelines for chemigation as defined in federal, state and local regulations. Almost
all states have defined chemigation and fertigation rules and regulations. Many States require
annual inspections of any facility where chemigation or fertigation are practiced. There may be
severe penalties enforced for not following a particular state's rules and regulations.
While the details of particular state regulations vary somewhat from state to state, there are three
components to every chemigation of fertigation facility that must always be installed and properly
functioning:
1. Backflow prevention valve. Backflow prevention valves prevent irrigation water
from flowing backwards (e.g. from a pivot back into the groundwater) in the event of
irrigation pump shut down or failure. In the case of chemigation or fertigation this is
especially important as the treated irrigation water would contaminate the groundwater
2. Injection check valve. Injection check valves provide two very important
functions. First, the injection check valve prevents chemicals from entering the irrigation
water unless the chemical is being pumped. The check valves on most positive
displacement metering pumps are not spring loaded. They will typically allow liquid to flow
freely through the pump by gravity means alone. Without an injection check valve,
chemical can continue to flow into the irrigation water pipe after the irrigation event has
stopped creating a very hazardous concentration of chemical in the pipe. Second, the
injection check valve prevents water from flowing backward through the injection system
in the event of injection pump failure. Backflow of water could flood the supply tank
creating a hazardous material spill. The Agri-Inject Mister Mist’r®is a regulatorally
approved injection check valve.
3. Positive interlock. Injection systems must be positively interlocked to the irrigation
system. In most cases, the interlock can either be electrical or logical. The interlock
interrupts the electrical power to the injection when irrigation stops for any reason.
Typically this interlock is provided by a water pressure activated “Chem Switch” circuit in a
pivot panel or a contactor actuated by the same circuit that activates the irrigation water
pump motor.
See the following Figures 1-4 depicting the importance of these three safety devices::