Detroit Radiant Products AG2 series User manual

WARNING
!
!
Improper installation, adjustment, alteration, service or maintenance can cause
property damage, injury or death. Read the installation, operation and maintenance
instructions thoroughly before installing or servicing this equipment.
This heater must be installed and serviced by trained gas installation and service
personnel only. Failure to comply could result in personal injury, asphyxiation, death,
fire or property damage.
In locations used for the storage of combustible materials, signs must be posted to
specify the maximum permissible stacking height to maintain the required clearances
from the heater to the combustibles. Signs must either be posted adjacent to the
heater thermostats or in the absence of such thermostats, in a conspicuous location.
Not for residential use! Do not use this heater in the home, sleeping quarters,
attached garages, etc. Installation of a commercial tube heater system in residential
indoor spaces may result in property damage, serious injury, asphyxiation or death.
AG2 Series
Insert Manual
For complete installation instructions, see the Tube Heater General Manual
that accompanies this Series Insert Manual.
The AG2 Series Infra-Red Tube Heater is a positive pressure, two-stage radiant heater system. This insert
manual is a supplement to the Tube Heater General Manual and provides specific information related to
the AG2 Series model. All persons involved with the installation, operation and maintenance of the heater
system must read and understand the information in this insert manual and the accompanying Tube
Heater General Manual.
For Your Safety
If you smell gas:
• Do not try to light any appliance. • Immediately call your gas supplier from a neighbor’s phone.
• Do not touch any electrical switch. • Follow the gas supplier’s instructions.
• Do not use any phone in your building. • If you cannot reach your gas supplier, call the fire department.
Keep these instructions for future reference.
F/N: LIOAG2a-3M-5/07 (MWG)
Replaces F/N: LIOAG2-2M-2/06

Contents
1.0 Safety...................................................................3
SafetyLabelsandLocations............................................3
ClearancetoCombustibles.............................................4
2.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Combustion Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ElectricalRequirements ...............................................7
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Specifications......................................................10
TubeInstallationSequence............................................11
3.0 Operation ..............................................................12
SequenceofOperation...............................................12
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.0 Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.0 Parts ..................................................................18
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
PartsList..........................................................18
KitContentsCheckList...............................................20
Approvals..........................................................20
LimitedWarranty....................................................20
NOTE: See page 10 for a list of available models and specifications.
2
AG2 Series

1.0 Safety
Manifold Pressure
Max.Inlet Pressure
Min.Inlet Pressure for
Purpose of Input Adjustment
Min.Mounting Angle
Max.Mounting Angle
Combustion Chamber
W.C.P.
W.C.P.
W.C.P.5.0in.
14.0in.
3.5in.
0 DEGREES
45 DEGREES
4”BC Aluminized
120V
4.8
1.1
C1
VOLTSAC 60Hz
AMPS - Starting
AMPS - Running
HeaterType:
DESIGN COMPLIESWITH:
ANSIZ83.20b-2003-GASFIREDLOWINTENSITYINFRA-RED HTR.
ForStainlessSteel Upgrades the Combustion Table is upgraded to 409 Stainless Steel
Serial No.0603DETR12345 0001
DETROITRADIANT PRODUCTS CO.
21400HOOVERROAD- WARREN, MI 48089
[phone] www.reverberray.com
AG2- 40 - 125N
MODEL NO.
125,000 / 95,000
INPUT BTU/H
NATGAS
FOR USE WITH
RE-VERBER-RAYINFRA-RED RADIANT TUBE HEATER
FORINDOOR INSTALLATION ONLY
DONOT
AIR
METERING
ORIFICE
REMOVE
NEUTRAL
EARTH
HOT
-120V HEATER INPUT -
120V
AIR
METERING
ORIFICE
DONOT
REMOVE
Manifold Pressure
Max. Inlet Pressure
Min. Inlet Pressure for
Purpose of Input Adjustment
Min. Mounting Angle
Max. Mounting Angle
Combustion Chamber
W.C.P.
W.C.P.
W.C.P.5.0in.
14.0in.
3.5in.
0 DEGREES
45 DEGREES
4”BC Aluminized
120V
4.8
1.1
C1
VOLTS AC 60Hz
AMPS - Starting
AMPS - Running
HeaterType:
DESIGN COMPLIES WITH:
ANS Z83.20b-2003-GASFIRED LOW INTENSITY INFRA-RED HTR.
For Stainless Steel Upgrades the CombustionTable is upgraded to 409 Stainless Steel
Serial No. 0603DETR12345 0001
DETROIT RADIANT PRODUCTS CO.
21400HOOVER ROAD - WARREN, MI 48089
[phone] www.reverberray.com
AG2 - 40 - 125N
MODEL NO.
125,000 / 95,000
INPUT BTU/H
NAT GAS
FOR USEWITH
RE-VERBER-RAY INFRA-RED RADIANTTUBE HEATER
FOR INDOOR INSTALLATION ONLY
GasValve:
Circuit Board:
Wire Harness:
N.O. Switch:
N.O.VL Orifice:
N.C. Switch:
N.C.VL Orifice:
Diff Switch:
Diff VL Orifice:
Igniter:
Burner:
16”Tube:
Ind Lights:
Diag Light:
Term Block:
Transfomer:
Fan:
Alternate Fan:
Alt. Fan Usage:
IS22016051F5169 264E
36E96-224-N
Micro60-24
840
851
3 PCS Harness 852
None N/A
None
None N/A
None
Grey (+/-)
Norton 50
High 201
4”Stnd. 202
Yellow - 24V 828
Red LED 827
None N/A
40VA 826
Fasco Lg. 55A
50Hz - 120V 55B
When Specified
BURNER COMPNENTS (Specify TP - #’s)
Your Heater is:C1
OrificeType
Gas:TP204-#
Air:TP44-#
C1 C2 C3
3 3 1
1 1/2” 1 5/8” 1 5/8”
Relay:
Filter:
24 Volt In:
120 Volt In:
None N/A
None
3T - plug 832
2x4 Box
Gas In:
Extra VL Orifice:
7/8” FC Flare 83
None
N/A
66
TUBE COMBINATION / KIT PARTS
Combustion:
Radiant:
Clamp:
Hangers:
RCS:
Reflector:
Endcap:
Baffle:
ID:
Electric:
Special 1:
Special 2:
Tag:
For Internal Use Only
TP-26A
TP-26A
TP-21B
TP-19B
TP-82
TP-20C
TP-105
TP-651 - 4”R
TP-26E
TP-26D
TP-21O
TP-19B-SS
TP-82-SS
TP-20C-SS
TP-105-SS
Item Standard Stainless Steel
Re-Verber-Ray
LLWT38
Micro60
Plug-Wh.
None
For all
Standard
Labels
See Board
Contact factory at 586-756-0950 for parts information and list prices. Or visit
http://wwwreverberray.com/parts
Data on this label is for the model shown on this label. If your heater has been
converted, this information is not correct.Please contact the factory for assistance.
RVA2-40-125N
Production Code: RVA2-125
Version: 8/06
0603DETR12345 0001
Serial #: N/A
Stock:
None
Add-On Option(s):
SAMPLE
SAMPLE
Safety Labels and Their Locations
1.0 Safety • Safety Labels and Locations
Read and understand all safety information and warnings in this insert manual and the
Tube Heater General Manual before installation, operation and maintenance of the
radiant tube heater system.
Back Panel
Top Panel
AG2 Series
Rating Plate
F/N: LLTB018 (Natural Gas)
F/N: LLTB019 (LP Gas)
F/N: LLTB008
F/N: LLTCL001 Clearance to
Combustibles Label
3
Burner Control Box
Component Label (located
under the top panel)
Product safety signs or labels should be replaced by the product user when they no longer are legible.
Contact either your local distributor or the product manufacturer for obtaining replacement signs or labels.
24V
24V IN
NEUTRAL
- 24V HEATER INPUT -
F/N: LLV3EP8
NEUTRAL
EARTH
HOT
- 120V HEATER INPUT -
120V
F/N: LLV3EP1

LED CODE FAULT STATUS FAULT CODE DELAY
Initial flash on power up,
then steady off
Normal operation Immediate
Steady on Module failure / Internal fault Immediate
1 flash Ignition failure 30-32 minutes
2 or 3 flashes APS - Note: fan / intake / exhaust 10-12 minutes
4 flashes
Solenoid valve fault / Leaky valve /
Flame amplifier fault
Immediate
No flash on 117V start up Transformer fault Immediate
!
CAUTION
Provide 24
Volts Only
This heater has a 24 Volt
control system. Do not
connect 120 Volt power
supply, as it will damage
the controls.
LEDCODE FAULTSTATUS FAULTCODEDELAY
Initialflashonpowerup,
thensteadyoff
Normaloperation Immediate
Steadyon Modulefailure/Internalfault Immediate
1flash Ignitionfailure 30-32minutes
2or3flashes APS-Note:fan/intake/exhaust 10-12minutes
4flashes
Solenoidvalvefault/Leakyvalve/
Flameamplifierfault
Immediate
Noflashon117Vstartup Transformerfault Immediate
This heater is equipped with an
HLRB (Relay Board) required for
grouping multiple heaters on the
same thermostat. This heater must be wired
with a field supplied transformer in accordance
with the installation, operation manual.
AVOID EQUIPMENT FAILURE
THIS 10 FT.TUBE IS THE
COMBUSTION CHAMBER.
THISTUBE MUST BETHE FIRSTTUBE
FOLLOWINGTHE BURNER CONTROL BOX.
!
INSTALLER
The combustion chamber utilizes either 409
stainless, titanium alloy or aluminized steel -
depending on the model number of your heater.
Rotate the tube’s welded seam to bottom.
Consult the manual(s) for further details.
4
1.0 Safety • Safety Labels and Locations • Clearance to Combustibles
F/N: LLTP031 (This label is located on
models with a relay board installed only.)
AG2 Series
F/N: LLTB007(2)
F/N: LLDR003
(This label is
located on models
with a relay board
installed only).
SERVICE ACCESS PANEL
IGNITER & FLAME SENSE COMPARTMENT
1. Turn off gas & electricity.
2. Remove cover by lifting top
cover upward and outward.
CAUTION: HOT SURFACE.
KEEP COVER IN PLACE. REMOVE FOR SERVICE ONLY.
SERVICE ACCESS PANEL
IGNITER & FLAME SENSE COMPARTMENT
1. Turn off gas & electricity.
2. Remove cover by lifting top
cover upward and outward.
CAUTION: HOT SURFACE.
KEEP COVER IN PLACE. REMOVE FOR SERVICE ONLY.
INSTALLER
***AVOIDEQUIPMENT FAILURE***
THIS 10’ TUBE IS THE
COMBUSTIONCHAMBER.
THECOMUSTION CHAMBER UTILIZES
EITHER409 STAINLESS TITANIUMOR ALUMINIZED
STEEL- DEPENDING UPON THE
MODELNUMBER OF YOUR HEATER
THISTUBE MUST BE THE FIRST TUBE
FOLLOWINGTHE BURNER BOX.
MOUNTWELDED SEAM TOBOTTOM
CONSULTIOMOR PACKAGING STICKER FOR DETAILS
F/N: LLTB004 (orange)
F/N: LLTB026
Right Panel
(Valve Compartment)
Radiant
Tube
Primary Combustion
Chamber
16” Burner Tube
Left Panel
(Fan Compartment)
!
CAUTION
Provide 24
Volts Only
This heater has a 24 Volt
control system. Do not
connect 120 Volt power
supply, as it will damage
the controls.
F/N: LL01 - Clearance Safety Tag
(Affix adjacent to heater’s thermostat)
HIGH
FIRE
HL
LOW
FIRE
F/N: LLV2EP9

WARNING
!
!
Placement of explosive objects, flammable objects, liquids and vapors close to
the heater may result in explosion, fire, property damage, serious injury or death.
Do not store or use explosive objects, liquids or vapor in the vicinity of the heater.
Clearance to combustibles is defined as the minimum distance that must exist between the tube surface,
or reflector, and any combustible items (see Figure 1.1). It also pertains to the distance that must be
maintained from moving objects around the tube heater. Wheninstalling thetube heatersystem, clearances
to combustibles for the Series tube heater and configuration must be maintained.
Clearance to Combustibles
Model Number Mounting Angle* Sides Front Behind Top** Below
AG2 (20, 30, 40) - (65, 75) [N, P] 0° 9 9 6 60
45° 39 8 10 60
with 1 side shield 0° 29 8 6 60
with 2 side shields 0° 9 9 6 60
20 ft. from burner 0° 7 7 6 30
AG2 (30, 40, 50) - 100 [N, P] 0° 14 14 6 66
45° 39 8 10 66
with 1 side shield 0° 29 8 6 66
with 2 side shields 0° 16 16 6 66
20 ft. from burner 0° 7 7 6 30
AG2 (40, 50) - 125 [N, P] 0° 20 20 6 76
45° 58 8 10 76
with 1 side shield 0° 42 8 6 76
with 2 side shields 0° 20 20 6 76
20 ft. from burner 0° 7 7 6 30
AG2 (40, 50, 60) - 150 [N, P] 0° 24 24 6 81
45° 58 8 10 81
with 1 side shield 0° 42 8 6 81
with 2 side shields 0° 23 23 6 81
20 ft. from burner 0° 11 11 6 44
5
1.0 Safety • Clearance to Combustibles
Chart 1.1 • Clearance to Combustibles in Inches (see Figure 1.1 for Mounting Angles)
Figure 1.1 •Mounting Angles
0° Mounting Angle 45° Mounting Angle 0° Mounting Angle
with 1 Side Shield 0° Mounting Angle
with 2 Side Shields
Side Side
Below
Top
Front Behind Front
Behind
Side Side
AG2 Series
* Heaters mounted on an angle between 0° to 45° must maintain clearances posted for 0° or 45°; whichever is greater.
** Maintain a 10 in. (0° mounting angle) or 12 in (1-45° mounting angle) clearance from ceilings constructed of tri-ply
plastic or plastic fogger lines.
Top Top Top
Below Below Below

6
2.0 Installation
2.0 Installation • Electrical Requirements
Instructions for the following are detailed in the Tube Heater General Manual:
• Design considerations
• Hanger suspension and placement (Note: Placement for poultry facilities on page 9).
• Tube layout and assembly
• Burner control box suspension
• Reflectors (and accessories)
• Venting and combustion air intake
• Gas requirements
• Baffle assembly
NOTE: Electronic versions of all manuals are available at www.detroitradiant.com.
AG2 Series
WARNING
!
!
Improper installation, adjustment, alteration, service or maintenance can cause property
damage, serious injury or death. Read and understand, the installation, operating and
maintenance instructions thoroughly before installing or servicing this equipment. Only
trained, qualified gas installation and service personnel may install or service this equipment.
Not for residential use! Do not use this heater in the home, sleeping quarters, attached
garages, etc. Installation of a commercial tube heater system in residential indoor spaces
may result in property damage, serious injury or death.
Combustion Air
The combustion air intake collar is also a factory preset air orifice. Non-contaminated air for combustion
must be ducted to the heater in all agricultural applications. Do not take combustion air from pressurized
attic spaces, with the exception of broiler houses.
Locate the air intake away from any steam source. Use caution when locating air intake above curtain
walls, as they can leak. When curtain walls are present, use 4-inch light gauge PVC air intake material
from curtain sidewall to the heater; do not exceed 25 feet. With an elbow, drop intake one foot below the
top of the curtain wall. Cap intake with a 1/4-inch birdscreen. Figure 2.1.
Figure 2.1 •Combustion Air Intake (Broiler House)
Burner
control box
Air intake
through attic
(broiler houses)
1/4 in. birdscreen
on plastic tee
Curtain wall

WARNING
!
!
• 120 Volt - 60 Hz GRD, 3-wire.
• 24V control connection.
• Starting current 4.8 amps
• Running current 1.1 amps
The AG2 Series is equipped standard with an internal relay board. 24 volts must be supplied to each
heater’s yellow control cord. 120 volts is supplied to the heater’s black cord; observe polarity.
Confirm proper two-stage electrical wiring by cycling heater between stages. Confirm proper operation of
high fire, low fire and off cycles.
7
2.0 Installation • Wiring
Electrical Requirements
Connecting the thermostat with a voltage other than 24V may damage the heater. The AG2 Series
requires a 24V connection to the thermostat. This is supplied by an external transformer (field supplied).
See below.
Electric Shock
Field wiring to the tube heater must be connected and grounded according to the guidelines
in the Tube Heater General Manual and Series Insert Manual and in accordance with
national, state, provincial and local codes. In the United States refer to the most current
revisions to the ANSI/NFPA 70 Standard and in Canada refer to the most current revisions
to the CSA C22.1 Part I Standard.
Wiring
AG2 Series
Figure 2.2 •Field Wiring Diagrams
A. Multiple Heaters, Single Control. With Relay Board
N L1
N
L1

THERMOSTAT
CORD
W
G
B
THERMOSTAT
CORD
GW
B
120/24V
TRANSFORMER
8
2.0 Installation • Wiring AG2 Series
Before field wiring this appliance - Check existing wiring; replace if necessary.
Note: If any of the original wire as supplied with the appliance must be replaced, it must be replaced with
wiring material having a temperature rating of at least 105° C.
Figure 2.3 • Internal Wiring Diagrams
A. Micro 60U-24 Ladder Diagram
B. Micro 60U-24 Block Diagram

9
2.0 Installation • Wiring
Figure 2.4 •Sample Brooder Installation Diagrams
A. Center House Installation
B. Side Wall Installation
AG2 Series
C. 30 ft., 40 ft. and 50 ft. Tube Brooder Installation (houses with 4 ft. and 5 ft. on center truss locations).
NOTE: Utilize elongated hangers (TP-19E) on houses 60 feet or more with center house mounting to allow for a
wider throw pattern.
NOTE: Mount Reector at a 45° angle toward center. NOTE: Standard hangers (TP-19B) are used when sidewall
mounting. Elongated hangers (TP-19E) are not to be used.

10
Model Number Gas Type (select one) BTU/H (High Fire) BTU/H (Low Fire) Straight Length U-Tube Length Standard Weight (lbs.) Recommended Mounting Height Above Animals Combustion Chanber (uncoated) Radiant Emitter Tube(s) (uncoated)^ Radiant Surface Area (sq. ft.) 36” Baffle Sections Optional Alum-AO Quantity
AG2-20-65 N or LP 65,000 50,000 21’-7” 13’-0” 120 6’ to 9’ Alum HRT 20.2 5 1
AG2-20-75 N or LP 75,000 50,000 21’-7” 13’-0” 120 7’ to 10’ Alum HRT 20.2 5 1
AG2-30-65 N or LP 65,000 50,000 31’-3” *17’-8” 160 6’ to 9’ Alum HRT 30.4 5 2
AG2-30-75 N or LP 75,000 50,000 31’-3” *17’-8” 160 7’ to 10’ Alum HRT 30.4 5 2
AG2-30-100 N or LP 100,000 65,000 31’-3” *17’-8” 160 8’ to 14’ Alum HRT 30.4 6 2
AG2-40-65 N or LP 65,000 50,000 40’-11” 22’-8” 190 6’ to 9’ Alum HRT 40.5 5 3
AG2-40-75 N or LP 75,000 50,000 40’-11” 22’-8” 190 7’ to 10’ Alum HRT 40.5 5 3
AG2-40-100 N or LP 100,000 65,000 40’-11” 22’-8” 190 7’ to 11’ Alum HRT 40.5 5 3
AG2-40-125 N or LP 125,000 95,000 40’-11” 22’-8” 190 9’ to 14’ Alum HRT 40.5 5 3
AG2-40-150 N or LP 150,000 100,000 40’-11” 22’-8” 190 10’ to 14’ Ti-AL HRT 40.5 5 3
AG2-50-100 N or LP 100,000 65,000 50’-7” *27’-4” 235 8’ to 11’ Alum HRT 50.6 5 4
AG2-50-125 N or LP 125,000 95,000 50’-7” *27’-4” 235 9’ to 14’ Alum HRT 50.6 5 4
AG2-50-150 N or LP 150,000 100,000 50’-7” *27’-4” 235 10’ to 14’ Ti-AL HRT 50.6 5 4
AG2-60-150 N or LP 150,000 100,000 60’-3” 32’-4” 265 10’ to 14’ Ti-AL HRT 60.7 5 5
Specifications
2.0 Installation • Product Specifications
Chart 2.1 • Specifications
AG2 Series
* Model requires 5EA-SUB accessory package when installing in a ‘U’ configuration (P/N: TF1B).
^ ALUM-AO: Upgrade hot-rolled steel (HRT) radiant tubes to 16 gauge, black coated, aluminized steel for maximum
efficiency and longevity. NOTE: This option is highly recommended in contaminated or moisture laden
environments (i.e. poultry applications). See Chart 2.1 for quantity needed per heater.
AGAO-SS: Upgrade burner control box from coated steel to 304 Series stainless steel.

Key
11
Tube Installation Sequence
20 Foot
50 Foot
60 Foot
30 Foot
40 Foot
AG2 Series
Figure 2.5 •Tube Installation Sequence
Burner Control Box with
16” Burner Tube
Uncoated Steel Primary
Combustion Chamber
2.0 Installation •Tube Sequence •Heater Length
Important! The combustion chamber & radiant tube sections must be installed in the following order.
NOTE:Refer to the Tube Heater General Manual, Chart 3.6 (page 22) for secured reflector joints.
Uncoated Aluminized Steel Secondary
Combustion Chamber Location
(150,000 BTU/H models only)
Uncoated Aluminized Steel
Secondary Combustion Chamber
(150,000 BTU/H models only)
Hot-Rolled Steel Radiant
Emitter Tube or ALUM-AO
Tube Clamp
Baffle Location
Uncoated Aluminized Steel Secondary
Combustion Chamber Location
(150,000 BTU/H models only)

WARNING
!
!
12
3.0 AG2 Series Operation • Sequence of Operation • Thermostat • Diagnostics
3.0 Operation
Note: Reference the Tube Heater General Manual for installation requirements.
Sequence of Operation
Standby: The MICRO 60U-24 CONTROL continually checks for internal faults, circuit integrity and relay
contact positioning.
Starting Circuit: Upon a call for heat, the control verifies that the differential switch is in the proper
position (open). The control energizes the fan. Once operational static pressure is achieved, the
differential switch will close initiating the ignition sequence. The glo-bar is powered and the gas
valve opens after 45 seconds. If the flame is not sensed, the heater will attempt to re-ignite for a total
of three (3) trials for ignition before proceeding to soft lockout.
Single Stage Running Circuit: After ignition, the flame rod monitors burner flame. If sense of flame is
lost, the control closes the gas valve within one second and a new trial sequence (identical to the
starting sequence) is initiated. If flame sense is not established within 8.5 seconds, the heater will
attempt two (2) additional ignition sequences before proceeding to soft lockout. The control can be
reset by briefly interrupting the power source.
Two Stage Running Circuit: The second stage on the gas valve is powered directly from the second
stage of the thermostat. In order for two stage to flow to a higher output, single stage must be
energized as well. The thermostat determines which stage to maintain for the desired temperature.
Shut Down: When the thermostat is satisfied, the fan will enter a two (2) minute post-purge cycle. Then
go to diagnostics; soft & hard lockout.
Thermostat
Note: Different thermostats operate according to their particular features. Refer to thermostat
specifications for details.
AG2 Series heaters require a 24V, two-stage thermostat to operate. The burner control box is equipped
with a 36” yellow 24V control wire. Do not supply 120V to the 24V connection.
Theoretical Example: The thermostat is set to 65° F. The thermostat’s preset differential for
high fire mode is 3° F.
When the temperature drops below the setpoint of the thermostat (65° F), low fire will activate. If
the temperature continues to drop below the setpoint by another 3° F (62° F), high fire will activate
bringing the temperature back up to the thermostat’s setpoint quickly.
This heater must be installed and serviced by trained gas installation and service
personnel only.
Do not bypass any safety features or the heater’s built in safety mechanisms will
be compromised.
AG2 Series

13
3.0 Operation • Diagnostics
Chart 3.1 • LED Fault Code Status
LED Code Fault Status Fault Code Delay*
Initial flash on power up, No fault, normal operation No Delay
then steady off
Steady ON Module failure / Internal fault No Delay
1 flash Ignition failure 30 – 32 minutes
2 or 3 flashes APS (Air Proving Switch) 10 – 12 minutes
(Fan / Intake / Exhaust)
4 flashes Solenoid valve fault No Delay
Leaky valve
Flame amplifier fault
No flash on 117V startup Transformer fault No Delay
*Some LED codes have a time delay before the LED will flash.
AG2 Series
Diagnostics
Lockout:
The controls will automatically lockout the heater system when an external or system fault occurs. There
are two types of lockout:
Soft Lockout: The heater will attempt to light three times. In the event of a failed attempt to light, (gas
pressure, valve, no flame sense etc.), the heater will enter a soft lockout period for 30
minutes and then attempt to light three more times before entering Hard Lockout mode.
Hard Lockout: If proof of flame is not established, a component failure occurs or blockages are evident,
the heater will enter hard lockout. If lockout occurs, the control can be reset by briefly
interrupting the power source. Refer to Chart 3.1 below for a description of LED codes.
Figure 3.1 • LED Operation Indicator Lights
Note: Hard lockout LED CODE will appear upon completion of the soft lockout sequence of operation.
Light 1(amber)
Indicates High
Fire Mode
Light 2 (amber)
Indicates Low
Fire Mode
Light 3 (red)
Indicates Diagnostic
Fault Code Status
(see Chart 3.1)
Operational Indicator Lights

Check the power across the green
and white wires of the yellow control
cord. Is there 24V power?
Is the power across the 24V terminal and
the ground on the circuit board 24V?
Does the fan
blower turn on?
Is the power across the TH terminal
and ground on the circuit board 24V?
Is there 120V on the
primary side of the
internal transformer?
Is the power at
the heater 120V?
Find the source
of the electrical
problem between
panel and heater.
Does the ignitor
warm up and
glow red?
14
4.0 Troubleshooting Guide
4.0 Troubleshooting Guide
Turn up thermostat
No
Yes
Continued on page 16.
AG2 Series
Yes
No
No
Yes
No
The circuit board
is faulty and must
be replaced.
No
The internal
transformer is
faulty and must
be replaced.
Yes
Yes
No
The relay board is faulty
and must be replaced.
Yes
Is the LED flashing a fault code?
(See page 13 for code status, then
continue troubleshooting below.)
Is the circuit board
sending 120V to the fan? No
Yes
Is the blower obstructed? The blower
is faulty and must
be replaced.
No
Yes
Remove obstruction.
Yes

NOTICE
Bypassing any switch is intended for testing purposes only. Do not leave switch bypassed
during normal operation or the heater’s built-in safety mechanisms will be compromised.
Is there 120V on the primary side
of the external transformer?
Is there 24V on the secondary side
of the external transformer? Is there 24V to the thermostat?
15
4.0 Troubleshooting Guide
Key
Start
Question Process
Question Corrective
Action
AG2 Series
No
Find the source of the electrical
problem between panel and the
external transformer.
No
The transformer is faulty
and must be replaced.
Yes
No
Find source of electrical
problem between
the transformer and
thermostat.
Yes The thermostat wiring
is faulty and should be
replace or repaired.
Yes

Does the burner lite and then
immediately go out?
16
4.0 Troubleshooting Guide
Continued from page 14.
AG2 Series
After the ignitor is warmed up,
does the gas valve open?
Does the burner light?
Yes
Test for 24V at gas valve
during opening period (30-45
seconds after power to the
heater). Is there 24V to the
gas valve for 8 seconds?
No No The circuit board
and/or wiring
harness is faulty
and should be
replaced.
Confirm that gas pressure is within maximum and minimum inputs
as indicated on the heater’s rating plate. Is gas pressure OK?
Yes
Correct
problem.
Replace gas
valve.
Is the ball valve in
the ON position?
No Yes Confirm that gas pressure is within
maximum and minimum inputs as
indicated on the heater’s rating
plate. Is gas pressure OK?
Yes
Correct
problem.
Purge air from
gas lines.
Yes
Does the burner stay lit? No
Yes
Does the burner
stay lit for at least
8 seconds and
then shut off? Yes Is the heater properly grounded?
Is the heater’s polarity correct?
Correct
problem.
Yes
Yes
No
No No
No
Yes
Troubleshooting
ends.
Does the burner stay lit until
the call for heat ends?
Yes The following can cause the heater to shut down:
• Improper grounding.
• High winds.
• Taking combustion air from attic space.
• Dirty environment.
• Improperly positioned baffle.
• Fluctuation gas pressure.
No

NOTICE
Bypassing any switch is intended for testing purposes only. Do not leave switch bypassed
during normal operation or the heater’s built-in safety mechanisms will be compromised.
Measure the voltage across
the red wire on the relay
board and ground on the
circuit board. Is there 24V?
17
4.0 Troubleshooting Guide
AG2 Series
Confirm that gas pressure is within maximum and minimum inputs
as indicated on the heater’s rating plate. Is gas pressure OK?
With a micrometer, check DC voltage at the
flame rod. Is it greater than 0.7 microamps?
Sensing rod is faulty or the flame is
too weak. Confirm that the heater is
operating at the proper gas pressure as
indicated on the heater’s rating plate.
Replace the sensing rod if necessary.
No
Yes Confirm that the flame rod sensor wire is
okay; if so, replace the circuit board.
If the heater does not enter High Fire mode, check the following:
Check the power across the green
and black wires of the yellow
control cord. Is there 24V?
Yes
Repair or replace the faulty
wiring or thermostat.
Yes
The valve is
faulty and must
be replaced.
The relay board is faulty
and must be replaced.
No
No
NOTE: To confirm that the heater is not in high fire
mode, check the manifold pressure. If it is 3.5” (natural
gas) or 10” (propane), the indicator light is faulty and
should be replaced. If approximately 2.0” to 2.5”
(natural gas) or 5.0” to 6.5” (propane), the heater is in
low fire mode and the troubleshooting steps described
here should be followed.
Correct
problem.
No
Yes Either there is a restriction
in the exhaust or the
pressure switch is faulty.

205
383A221
222
11
50
321
Chart 5.1 • Parts List
18
5.0 Parts • Heater Components and Parts List
5.0 Parts 1
264B, E, D
207
97
218
219
55A
1402 851
852
70
828 825 826
827
44
31B
122
33B 83, 83A 212
208A
TP-840A, 841A
223 204
200A or 201B
303A
12
9
10
217
5380
15
14
16
21B
222A
214
Figure 5.1 •Burner Assembly
Components
304
76
*May be used with stainless steel upgrades. ** 6 feet total required to cover outer edges of the burner control box.
31B
13
13
17
AG2 Series
301
334 114
333
68B
Part No. Description Part No. Description
TP-1 Control Box Cover TP-31B Control Box Mounting Bracket
TP-5 Flange Gasket TP-33B 1/2” Shut-Off Ball Valve / Inlet Tap
TP-9 Conduit Coupling TP-44 Metal Air Orifice with Screen (consult factory)
TP-10 Conduit 4” x 1/2” TP-50 Glo-Bar Ignitor
TP-11 Glo-Bar Ignitor Box TP-55A Fan Blower
TP-12 Glo-Bar Ignitor Box Cover TP-65I36” Interlocking Turbulator Baffle
TP-13 8 x 1/2” Self-Drilling Screw TP-68B Large Strain Relief Bushing with Lock Nut
TP-14 Sight Glass Gasket TP-70 Control Box Cover Gasket (per foot**)
TP-15 Sight Glass TP-76 Rubber Grommet
TP-16 Sight Glass Washer TP-82 Reflector Center Support (RCS)
TP-17 Sight Glass Kit TP-83 24” Stainless Steel Flexible Gas Connector
TP-19B 4” Wire Hanger with Tension Spring TP-83A 24” PVC Coated S.S. Flexible Gas Connector*
TP-19E Optional 4” Elongated Wire Hanger TP-84 1/2” Female / Male Flare Fitting
TP-20C 120” Aluminum Reflector TP-97 1/4” x 1/4” Brass Int./Ext. Atmos. Barb Fitting
TP-20D 120” Stainless Steel Reflector* TP-105 Aluminum Reflector End Cap
TP-21B 4” Standard Tube Clamp TP-106 Reflector End Cap Clips (8 pcs.)
TP-26F 10 ft. Uncoated (ALUM) Combustion Tube TP-113 Reflector Tension Spring
TP-26G 10 ft. Uncoated (AL-TI) Combustion Tube TP-114 Plastic Air Orifice with Screen
TP-26C 10 ft. Hot Rolled Steel (HRT) Radiant Tube TP-122 Gasket for Air Orifice and Air Collar
331
330
84

19B
106
105
26F, 26G
21B
20C, 20D
82
26C
65I
113
19E
Figure 5.2 •Tube & Reflector Components
19
5.0 Parts • Heater Components and Parts List
AG2 Series
Combustion Tube(s) Radiant Emitter Tube(s)
Part No. Description Part No. Description
TP-200A Burner (65-100 MBH Models) TP-303A End Panel, Right
TP-201B Burner (125-150 MBH Models) TP-304 Burner Control Box Outer Shell
TP-204 Gas Orifice (consult factory) TP-321 Ignition Plate Gasket
TP-205 Glo-Bar Holder TP-330 Divider Grommet
TP-207 Pressure Switch Mounting Bracket TP-331 Green Self Tap Ground Screw
TP-208A Gas Valve Mounting Bracket TP-333 36” Black 120 Volt Plug
TP-212 1/2” x 3” Pipe Nipple TP-334 36” Yellow 24 Volt Control Wire
TP-214 Glo-Bar Wiring Harness TP-380 16” Burner Tube with Flange
TP-217 Pressure Switch Barb TP-383A Glo-Bar Ignitor Plate
TP-218 Differential Switch Vinyl Sensing Tube (exhaust) TP-825 HLRB Relay Board
TP-219 Differential Vinyl Sensing Tube (burner) TP-826 40VA Transformer
TP-221 Glo-Bar Holder Gasket TP-827 Red LED Display Diagnostic Light
TP-222 Flame Rod TP-828 Amber Operational Indicator Light
TP-222A Flame Rod Wire TP-840A 36G54-224 GasValve - Natural Gas Assembly
TP-223 Gas Manifold TP-841A 36G54-226 Gas Valve - LP Gas Assembly
TP-264B Differential Pressure Switch, 65 to 75 MBH TP-851 Micro 60U-24 Diagnostic Circuit Board
TP-264E Differential Pressure Switch, 100 & 125 MBH TP-852 3-Piece Wire Harness Set for Micro 60 Board
TP-264D Differential Pressure Switch, 150 MBH TP-1402 End Panel, Left
TP-301 Center Divider Panel

AG2 Series
Insert Manual
Part No. Description 20 Ft. 30 ft. 40 ft. 50 ft. 60 ft.
TP-19B 4” Hanger w/ Tension Spring 3 4 5 6 7
TP-19E 4” Elongated Hanger w/ Tension Spring Optional Optional Optional Optional Optional
TP-21B 4” Tube Clamp 2 3 4 5 6
TP-33B 1/2” Shut-Off Valve & Inlet Tap 1 1 1 1 1
TP-82 4” Reflector Center Support 1 1 1 1 1
TP-83 24” S.S. Flexible Gas Connector 1 1 1 1 1
TP-105 Reflector End Cap 2 2 2 2 2
TP-106 Reflector End Cap Clips 8 8 8 8 8
LIOGTa General Tube Heater Manual 1 1 1 1 1
LIOAG2a AG2 Series Insert Manual 1 1 1 1 1
Chart 5.2 • Kit Contents for AG2 Series - Reference the length column for your model.
TP-19B 4” Hanger with
Reflector Tension Spring
TP-105 Reflector End Cap
TP-21B 4” Tube Clamp
TP-106 Reflector
End Cap Clips
TP-33B 1/2” Shut-Off Valve
(Ball Valve & Inlet Tap)
TP-83 24” Stainless Steel
Flexible Gas Connector
Filled By:
Kit Contents Check List
20
AG2 Series Kit Contents
Tube Heater General and
AG2 Series Insert Manuals
F/N: LIOGTa & LIOAG2a
TP-82 4” Reflector
Center Support (RCS)
* Part number for models upgraded with stainless steel options.
© 2007 Detroit Radiant Products Co.
21400 Hoover Road • Warren, MI 48089
Phone: [phone] Fax: [phone]
www.detroitradiant.com • [e-mail]
Printed in U. S. A.
5.0 Parts •Kit Contents Check List AG2 Series
Approvals
• CSA.
• Indoor/outdoor approval.
• Commercial/agricultural approval.
Limited Warranty
• 1 year - Burner box components.
• 3 years - Combustion and radiant tubes.
• 5 years - Stainless steel burner.
• See page 36 of the General Tube Heater Manual
for terms and conditions.
Tube Heater
General Manual
*TP-829
*TP-19C
*TP-220 *TP-105A
*TP-83A
TP-19E Optional 4”
Elongated Hanger with
Reflector Tension Spring