AGI Downstream LP, VP and NG-Fired Centrifugal Fan Heater Owner's manual

Read this manual before using product. Failure to

follow instructions and safety precautions can

result in serious injury, death, or property

damage. Keep manual for future reference.

Part Number: GNA-1435 R1

Revised: January 2023

Original Instructions

Downstream Centrifugal Fan

Heater

LP and NG-Fired Heater

Installation, Operation, and Parts Manual

This manual applies to:

GGH-8371 and GGH-8372

INSTALLATION AND WIRING MUST BE IN

ACCORDANCE WITH CEC, NEC, AND

LOCAL ELECTRICAL CODES

This product has been designed and manufactured to meet general engineering standards. Other local

regulations may apply and must be followed by the operator. All personnel must be trained in the correct

operational and safety procedures for this product. Use the sign-off sheet below to record initial and periodic

reviews of this manual with all personnel.

Date Employee Name and Signature Employer Name and Signature

New in this Manual

The information below summarizes the changes to this manual since the last revision in April 2016.

Description Section

New heater model Section 2.9.2 – Safety Decal Locations and Details on

page 13

New heater model added Section 3.1 – Downstream Heater on page 16

Information updated Section 4.4 – Electrical Connection on page 21

Information updated Section 4.5 – Fuel Supply on page 24

New image added Section 4.6 – Install the Heater on page 27

New image added and information updated Section 4.7 – Connect the Gas Supply on page 29

Information updated Section 5.3.1 – Liquid Propane Startup on page 31

New information Section 5.3.2 – ON OFF Operation on page 31

New information Section 5.3.3 – HI LO Operation on page 32

New information Section 5.3.4 – Modulating Valve Operation on page

33

Information updated Section 6.3 – Visually Inspect the Downstream Heater

on page 36

Information updated Section 6.4 – Annual Maintenance on page 36

Removed Lubrication Requirements Related section removed

Updated Section 7.2 – Heater Diagnostic on page 39

Updated Section 7.3 – Symptoms/Causes/Solutions on page 40

Updated Section 8.1 – General Drying Operation Information

on page 43

New Table 6 on page 45

New Table 7 on page 46

New Table 8 on page 49

New Table 9 on page 50

Updated electical schematics Section 8.4 – Electrical Schematics on page 59

Updated Table 14 on page 62

DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER

GNA-1435 R1 5

CONTENTS

1. Introduction ............................................................................................................................................ 7

1.1 Product Information.................................................................................................................. 7

1.2 Intended Use ............................................................................................................................. 8

1.2.1 Misuse ........................................................................................................................ 8

2. Safety....................................................................................................................................................... 9

2.1 Safety Alert Symbol and Signal Words...................................................................................... 9

2.2 General Safety Information....................................................................................................... 9

2.3 Heater Safety........................................................................................................................... 10

2.4 Gas Leak Hazards..................................................................................................................... 10

2.5 Grain Bin Fires ......................................................................................................................... 11

2.6 Drives and Lockout/Tagout Safety .......................................................................................... 12

2.7 Personal Protective Equipment............................................................................................... 12

2.8 Safety Equipment .................................................................................................................... 12

2.9 Safety Decals ........................................................................................................................... 12

2.9.1 Decal Installation/Replacement............................................................................... 13

2.9.2 Safety Decal Locations and Details .......................................................................... 13

3. Features................................................................................................................................................. 16

3.1 Downstream Heater ................................................................................................................ 16

3.2 Burner Assembly ..................................................................................................................... 18

3.3 Control Box Assembly ............................................................................................................. 19

4. Installation ............................................................................................................................................ 20

4.1 Installation Safety.................................................................................................................... 20

4.2 Check Shipment....................................................................................................................... 20

4.3 Requirements for Canada ....................................................................................................... 20

4.4 Electrical Connection............................................................................................................... 21

4.4.1 Field and Control Wiring Entry................................................................................. 22

4.4.2 Disconnect ................................................................................................................ 22

4.4.3 Incoming Power Supply............................................................................................ 22

4.4.4 Grounding................................................................................................................. 23

4.5 Fuel Supply .............................................................................................................................. 24

4.6 Install the Heater..................................................................................................................... 27

4.7 Connect the Gas Supply .......................................................................................................... 29

5. Operation .............................................................................................................................................. 30

5.1 Operation Safety ..................................................................................................................... 30

5.2 Pre-Start Check........................................................................................................................ 30

5.3 Start-Up and Operation........................................................................................................... 31

5.3.1 Liquid Propane Startup ............................................................................................ 31

5.3.2 ON OFF Operation.................................................................................................... 31

5.3.3 HI LO Operation........................................................................................................ 32

5.3.4 Modulating Valve Operation.................................................................................... 33

5.4 Shutdown ................................................................................................................................ 33

5.5 Storage Instructions ................................................................................................................ 34

6. Maintenance ......................................................................................................................................... 35

6.1 Maintenance Safety ................................................................................................................ 35

6.2 Maintenance Schedule............................................................................................................ 35

DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER

6 GNA-1435 R1

6.3 Visually Inspect the Downstream Heater ............................................................................... 36

6.4 Annual Maintenance ............................................................................................................... 36

6.5 Fuel Train and Supply Gas Leak Check.................................................................................... 36

6.6 Pressure Regulator Maintenance............................................................................................ 37

6.7 Electrical Maintenance............................................................................................................ 37

6.8 Access Door ............................................................................................................................. 37

7. Troubleshooting.................................................................................................................................... 38

7.1 General Troubleshooting......................................................................................................... 38

7.2 Heater Diagnostic .................................................................................................................... 39

7.3 Symptoms/Causes/Solutions .................................................................................................. 40

8. Appendix ............................................................................................................................................... 43

8.1 General Drying Operation Information................................................................................... 43

8.2 FENWAL-Related Issues........................................................................................................... 52

8.3 V50 Modulating Valves — Johnson Controls.......................................................................... 56

8.4 Electrical Schematics ............................................................................................................... 59

8.5 Parts Lists................................................................................................................................. 62

9. Warranty ............................................................................................................................................... 71

GNA-1435 R1 7

1. Introduction

Thank you for your purchase. Follow the instructions in this manual for safe use of this downstream

heater. Following proper operation and maintenance will help to keep the downstream heater running

in optimal condition.

Keep this manual handy for frequent reference and to review with new personnel. A sign-off form is

provided on the inside front cover for your convenience. If any information in this manual is not

understood or if you need additional information, please contact AGI or your representative for

assistance.

This manual should be regarded as part of the equipment.

1.1. Product Information

Always give your dealer the following product information when ordering parts or requesting service. Please

record the product information in the table below for easy reference.

Local Dealer’s Name and

Address: Phone:

Local Contractor’s Name: Phone:

Service Contractor’s Name: Phone:

Purchase Date: Installation Date:

Model Number: Serial Number:

Fuel Type: Number of Blowers:

Wiring Diagram Drawing Number:

DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER 1. INTRODUCTION

8 GNA-1435 R1

1.2. Intended Use

The downstream heater is intended for use as listed below and described throughout this manual. Use in any

other way is considered contrary to the intended use and is not covered by the warranty.

Intended use for the downstream heater

• Designed for drying of field crops.

• Use outdoors only.

1.2.1 Misuse

Do not install/use the downstream heater for/with:

• applications other than as a heater for drying farm crops.

• heating buildings, sheds, barns, etc.

• finely milled grain dust.

1. INTRODUCTION DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER

GNA-1435 R1 9

2. Safety

2.1. Safety Alert Symbol and Signal Words

This safety alert symbol indicates important safety messages in this manual. When you see

this symbol, be alert to the possibility of injury or death, carefully read the message that

follows, and inform others.

Signal Words: Note the use of the signal words DANGER,WARNING,CAUTION, and NOTICE with the safety

messages. The appropriate signal word for each message has been selected using the definitions below as a

guideline.

Indicates an imminently hazardous situation that, if not avoided, will result in serious injury or

death.

Indicates a hazardous situation that, if not avoided, could result in serious injury or death.

Indicates a hazardous situation that, if not avoided, may result in minor or moderate injury.

Indicates a potentially hazardous situation that, if not avoided, may result in property damage.

2.2. General Safety Information

Read and understand all safety instructions, safety decals, and manuals and follow them when operating or

maintaining the equipment.

• Owners must give instructions and review the information initially and annually with

all personnel before allowing them in the work area. Untrained users/operators

expose themselves and bystanders to possible serious injury or death.

• Use for intended purposes only.

• Modification of the downstream heater in any way without written permission from the manufacturer is not

covered by the warranty.

• Follow a health and safety program for your worksite. Contact your local occupational health and safety

organization for information.

• Follow applicable local codes and regulations.

DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER 2. SAFETY

10 GNA-1435 R1

2.3. Heater Safety

Fire and explosion hazards, as well as carbon monoxide poisoning could occur if the heater is

misused. To avoid serious injury or death:

• Shut off and lock out or disconnect power and close valve at

gas source before inspecting or servicing the heater, or when

not in use.

• Do not operate the heater if not properly connected to an

aeration fan.

• Use the heater only with the gas types intended, connecting

alternate fuel sources to the heater can result in fires.

• Do not store or use gasoline or other flammable vapors and

liquids in the vicinity of this or any other appliance.

• Do not remove covers or screens, touch, or service internal

components during operation.

• After burner shutoff, allow the fan to run for five minutes

before removing cover(s).

• Do not use the heater where a high concentration of grain

dust, such as milled grain dust or, flammable liquids or vapors

exist

• Never allow anyone to enter the grain bin when a fan and

heater is operating. Gases given off by the burner (including

carbon monoxide and carbon dioxide) could cause death.

• Never use the heater to heat a building, shed, barn, etc.

because of the hazards posed by the flame and by the output

of carbon monoxide.

2.4. Gas Leak Hazards

If You Smell Gas:

• Turn off gas at the source if possible.

• Do not try to light or relight any appliance.

• Extinguish any flames and remove any sources of ignition from the vicinity of the bin.

• Do not touch any electrical switch.

• Evacuate all personnel from the vicinity of the source of the smell.

• Immediately call your gas supplier. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire department.

2. SAFETY DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER

GNA-1435 R1 11

2.5. Grain Bin Fires

To Prevent Fires:

• Use all equipment (fan, heater, air system and bin) as it is intended to be used.

• Ventilate, purge all contaminates, and allow burner, and drying areas to cool inside the

heater, in the heater area and the grain bin before any persons enter these areas.

• Keep the maximum plenum temperature not more than the maximum set point

temperature.

• It is not recommended that this heater be installed or combined with products from other

brands/manufacturers. The design and safety features may not be compatible, and the

desired performance may not be achieved.

• Grain dust is a fire hazard. Keep all areas (including areas under the perforated floors) free

from dust and fines.

• Screen grain before it goes into a bin to help prevent dust buildup. Using a grain spreader

will help distribute dust/fines.

• Ensure that floor supports don’t block transitions.

• Use the fan to ventilate the bins before igniting the heater. This will reduce the risk of a fire

or explosion from leaking fuel.

• Make certain a qualified electrician wires the components.

In the Event of a Fire:

• Never enter a bin that is on fire. Grain fires can cause serious injury or death.

• Shut off gas at the source. Shut off the fan. Call the fire department.

• Clear everyone out of the work area.

• Seal the fan inlet and any other opening to smother the fire.

• Remove the fan and heater from the transition. Sandbag the transition opening. Flood the

bottom of the bin with water up to about 4” (10 cm) above the perforated floor. This will

protect the floor supports and may help extinguish the fire.

• Direct water toward the source of the fire. If a fire is in the upper portions of the bin, insert

a long pipe with small holes into the grain and deliver water to the source of the fire. Doing

so may help confine the fire, but extinguishing a grain bin fire with water is unlikely to occur.

Emptying the bin is almost always necessary.

• Take note of neighboring structures and fuel tanks, cool them down if necessary.

• Remove all grain from the bin to reach the fire.

• Do not cut holes in the bin to remove the grain. Stay clear of flowing grain, it can bury a

person.

• Grain smoulders for days. Do not restart the fan until all grain has been removed from the

fire area.

DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER 2. SAFETY

12 GNA-1435 R1

2.6. Drives and Lockout/Tagout Safety

Inspect the power source(s) before using and know how to shut down in an emergency.

Whenever you service or adjust your equipment, make sure you shut down your power

source and gas supply and follow lockout and tagout procedures to prevent inadvertent

start-up and hazardous energy release. Know the procedure(s) that applies to your

equipment from the following power sources.

For example:

WARNING

• De-energize, block, and dissipate all sources of hazardous energy.

• Lock out and tag out all forms of hazardous energy.

• Ensure that only 1 key exists for each assigned lock, and that you are the only one that holds that key.

• After verifying all energy sources are de-energized, service or maintenance may be performed.

• Ensure that all personnel are clear before turning on power to equipment.

For more information on occupational safety practices, contact your local health and safety organization.

2.7. Personal Protective Equipment

The following Personal Protective Equipment (PPE) should be worn when operating or maintaining the

equipment.

Work Gloves

• Wear work gloves to protect your hands from sharp and rough edges.

2.8. Safety Equipment

The following safety equipment should be kept on site.

Fire Extinguisher

• Provide a fire extinguisher for use in case of an accident. Store in a highly visible and

accessible place.

First-Aid Kit

• Have a properly-stocked first-aid kit available for use should the need arise, and

know how to use it.

2.9. Safety Decals

• Keep safety decals clean and legible at all times.

2. SAFETY DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER

GNA-1435 R1 13

• Replace safety decals that are missing or have become illegible. See decal location figures that follow.

• Replaced parts must display the same decal(s) as the original part.

• Replacement safety decals are available free of charge from your distributor, dealer, or factory as applicable.

2.9.1 Decal Installation/Replacement

1. Decal area must be clean and dry, with a temperature above 50°F (10°C).

2. Decide on the exact position before you remove the backing paper.

3. Align the decal over the specified area and carefully press the small portion with the exposed sticky backing

in place.

4. Slowly peel back the remaining paper and carefully smooth the remaining portion of the decal in place.

5. Small air pockets can be pierced with a pin and smoothed out using the decal backing paper.

2.9.2 Safety Decal Locations and Details

Replicas of the safety decals that are attached to the downstream heater and their messages are shown in the

figure(s) that follow. Safe operation and use of the downstream heater requires that you familiarize yourself

with the various safety decals and the areas or particular functions that the decals apply to, as well as the safety

precautions that must be taken to avoid serious injury, death, or damage.

Figure 1. Safety Decal Locations

601-3729

601-3582

601-1995

DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER 2. SAFETY

14 GNA-1435 R1

Table 1. Safety Decals

Part Number Description

601-1995

(Control panel cover, outside)

To prevent serious injury or death:

• Only qualified personnel should service

electrical components.

• Disconnect and lockout power before

inspecting or servicing unit.

• Keep electrical components in good repair.

ELECTROCUTION HAZARD

WARNING

601-3729

Pour éviter tout risque de brûlure provoqué

par des composants internes:

• NE PAS retirer le couvercle, ni toucher ou changer

des composants internes pendant l’utilisation.

• Après l’arrêt du brûleur, laisser le ventilateur

tourner pendant 5 minutes avant de retirer le

couvercle.

RISQUE DE BRÛLURE

CAUTION

ATTENTION

To prevent burns from internal components:

• DO NOT remove cover, touch, or service internal

components during operation.

• After burner shutoff, allow fan to run for 5 minutes

before removing cover.

BURN HAZARD

2. SAFETY DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER

GNA-1435 R1 15

Table 1 Safety Decals (continued)

Part Number Description

601-3582

(Heater housing)

If the information in the manual is not followed exactly, a fire

or explosion may result causing property damage, personal

injury or loss of life

.

•

DO NOT store or use gasoline or other flammable vapours

and liquids in the vicinity of this or any other appliance.

• WHAT TO DO IF YOU SMELL GAS

• DO NOT try to light any appliance.

• Extinguish any open flames.

• DO NOT touch any electrical switch.

• Immediately call your gas supplier, call the fire

department.

• Installation and service must be performed by a qualified

installer, service agency or the gas supplier.

FOR YOUR SAFETY - The use and storage of gasoline and

other flammable vapors and liquids in open containers in the

vicinity of this appliance is hazardous.

Improper installation, adjustment, alteration, service or

maintenance can cause property damage, injury or death.

Read the installation, operating and maintenance instructions

thoroughly before installing or servicing this equipment.

Si les informations donn

ées dans le mode d’emploi ne sont pas

respectées à la lettre, un incendie ou une explosion pourrait survenir

et entraîner des dommages matériels, des blessures ou la mort.

• Ne pas entreposer ni utiliser d’essence ou autres vapeurs ou liquides

inflammables à proximité de cet appareil ou de tout autre appareil.

• Quoi faire si vous sentez une odeur de gaz

• N’allumez aucun appareil ;

• Éteindre toutes les flammes nues ;

• Ne touchez à aucun interrupteur ;

• Appelez immédiatement votre fournisseur de gaz. Suivez les

instructions du fournisseur de gaz ;

• Si vous ne pouvez rejoindre le fournisseur, appelez le service des incendies.

• L’installation et les réparations doivent être confiés à un installateur

ou un réparateur qualifié ou au fournisseur de gaz.

POUR VOTRE S

ÉCURITÉ -

Il est dangereux d’utiliser et d’entreposer

de l’essence et autres vapeurs et liquides inflammables se trouvant

dans des contenants ouverts à proximité de cet appareil.

Une installation, un réglage, une modification, une réparation ou un

entretien inadéquats peuvent entraîner des dommages matériels, des

blessures ou la mort. Lire attentivement les instructions d’installation,

de fonctionnement et d’entretien avant de procéder à l’installation ou

à la réparation de cet appareil.

WARNING AVERTISSEMENT

DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER 2. SAFETY

16 GNA-1435 R1

3. Features

Read this section to familiarize yourself with the basic component names and functions of the

downstream heater.

3.1. Downstream Heater

Note

AGI Downstream Centrifugal Fan Heaters are sized according to the centrifugal fan’s power source and

the motor HP rating.

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$66(0%/<

)8(/75$,1

$66(0%/<

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$66(0%/<

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3. FEATURES DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER

GNA-1435 R1 17

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+$1'/(

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DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER 3. FEATURES

18 GNA-1435 R1

3.2. Burner Assembly

FLEXIBLE

HARNESS

PROTECTION

TO

FUEL TRAIN

HARNESS:

TO

CONTROL BOX

NOTE: The burner ports (holes) are

on the opposite side of this pipe.

FLAME PROBE

BURNER

HOUSING

IGNITER PLUG

3. FEATURES DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER

GNA-1435 R1 19

3.3. Control Box Assembly

Important

The power “IN” to the heater control box comes from the centrifugal fan - this must be wired such that

there is no power to the heater unless the fan is running.

1.5A FUSE

ON / OFF

SWITCH

3A FUSE

12’ [3.6 METERS]

POWER “IN” CABLE

(CONNECTED TO FAN)

FENWAL

CONTROL

BOARD

BURNER

HI - LIMIT

SAFETY CONTROL

TRANSITION

HI - LIMIT

SAFETY CONTROL

(INSIDE BOX)

TERMINAL

BLOCK

DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER 3. FEATURES

20 GNA-1435 R1

4. Installation

Before continuing, ensure you have completely read and understood this manual’s

Safety section, in addition to the safety information in the section(s) below.

4.1. Installation Safety

• All installation and servicing operations are to be carried out by a qualified technician.

• The equipment shall be installed in accordance with applicable local codes and regulations.

• Do not take chances with safety. The components can be large, heavy, and hard to handle.

Always use the proper tools, rated lifting equipment, and lifting points for the job.

• Always have two or more people installing the downstream heater.

• Make sure you have sufficient lighting for the work area.

• Tighten all fasteners according to their specifications. Do not replace or substitute bolts,

nuts, or other hardware that is of lesser quality than the hardware supplied by the

manufacturer.

4.2. Check Shipment

Unload the downstream heater parts at the assembly site and compare the packing slip to the shipment

contents. Ensure that all items have arrived and that none are damaged. Take pictures of shipments prior to, or

just after, unloading if there are any damages.

Report missing or damaged parts immediately to ensure that proper credit is received from AGI or your

representative, and to ensure that any missing parts can be shipped quickly to avoid holding up the assembly

process.

Important

Do not assemble or install damaged components.

4.3. Requirements for Canada

• “The equipment shall be installed in accordance with the Natural Gas and Propane Installation Code, CSA

B149.1 and the Propane Storage and Handling Code, CSA B149.2, or applicable provincial regulations, which

should be carefully followed in all cases. Authorities having jurisdiction should be consulted before

installations are made”.

• Electric disconnect switch having adequate ampacity (if not provided as part of the dryer) shall be installed

in accordance with the Canadian Electric Code. Part 1, CSA C22.1.

4. INSTALLATION DOWNSTREAM CENTRIFUGAL FAN HEATER – LP AND NG-FIRED HEATER

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AGI Downstream LP, VP and NG-Fired Centrifugal Fan Heater Owner's manual

AGI Downstream LP, VP and NG-Fired Centrifugal Fan Heater Owner's manual

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