Re-Verber-Ray DET3-20-65, DET3-30-65, DET3-40-75, DET3-40-65, DET3-40-100 Insert Manual
...
DET3 Series
!
Insert Manual
For complete installation instructions, see the Tube Heater General Manual
that accompanies this Series Insert Manual.
The DET3 Series Infrared 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 DET3 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:
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.
• 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.
LIODET3-Rev. 27512
Pr int: R ev. 21511_2M -8 / 11- r4_11/ 13 (C DS)
Replaces: LIODET3-2M-7/09(CDS)
DET3 Series
Contents
1.0 Safety...................................................................3
Safety Labels and Locations ............................................3
Clearances to Combustibles ............................................4
2.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Gas Requirements ...................................................6
Electrical Requirements................................................6
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Specifications ......................................................10
Tube Installation Sequence ............................................11
3.0 Op eration ..............................................................12
Sequence of Operation ...............................................12
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.0 Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.0 Parts ..................................................................18
Burner Assembly Components .........................................18
Tube and Reflector Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Kit Contents Check List ...............................................20
Approvals..........................................................20
Limited Warranty ....................................................20
NOTE: See page 10 for a list of available models and specifications.
2
Air Metering Orifice
DO NOT REMOVE
TP-114
TP-3014
3”
SAMPLE
DET3 Series
- 120V HEATER INPUT -
1.0 Safety • Safety Labels and Locations
1.0 Safety
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.
Safety Labels and Their Locations
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.
F/N : LLV3 EP1
120V Inp ut
F/N : LLV3 EP2
24V Input
F/N : LLV3 EP7
High Fire Light
Top Panel
120V
2. Remove top cover (2 thumbscrews).
3. Remove tsix (6) 1/4” screws.
4. Lift and remove panel.
KEEP COVER IN PLACE. REMOVE FOR SERVICE ONLY.
HOT
NEUTRAL
EARTH
HOT
NEUTRAL
120V
EARTH
- 120V HEATER INPUT -
HIGH
LOW
24V
NEUTRAL
- 24V HEATER INPUT -
H
HIGH
FIRE
F/N: LLAC
Air Metering Orifice
Rear Panel
F/N: LLTB018 (Natural Gas)
F/N: LLTB019 (LP Gas)
FAN COMPARTMENT
1. Disconnect gas & electricity.
SERVICE ACCESS PANEL
SERVICE ACCESS PANEL
KEEP COVER IN PLACE. REMOVE FOR SERVICE ONLY.
4. Swing hinged panel downward.
3. Remove top cover.
2. Remove four (4) thumbscrews.
1. Disconnect gas & electricity.
CONTROLS & GAS VALVE COMPARTMENT
Bottom Panel
F/N: LLTCL001L, C, R
Clearance to Combustibles Labels
F/N: LLLOGO4
Logo Label
3
1.0 Safety • Safety Labels and Locations • Clearance to Combustibles
!
ALUMINIZED TUBE
(This is the Second Chamber)
This tube is constructed of aluminized coated steel and must be
placed directly after the titanium coated “Combustion Chamber”
(orange labeled tube).
DET3 Series
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.
F/N: LLTB026 F/N: LLTB024R
SERVICE ACCESS PANEL
IGNITER & FLAME SENSE COMPARTMENT
1. Disconnect 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
F/N: LLTB025L
SERVICE ACCESS PANEL
RE-VERBER-RAY INFRA-RED RADIANT TUBE HEATER
®
FOR INDOOR (Non-Residential) INSTALLATION ONLY.
Class IIIA Permanent Label
MODEL NO.
INPUT BTU/H
125,000 / 95,000
Manifold Pressure:
3.5 in.
Maximum Inlet Pressure:
14 in.
Minimum Inlet Pressure:
5.0 in.
Inches W.C.P.
Inches W.C.P.
Inches W.C.P.
FOR USE WITH
Natural Gas
Heater Type
C1
Minimum Mounting Angle:
045DEGREES
Maximum Mounting Angle:
DEGREES
Serial No.: 1208XXXXXXXXXX 0001
DET-40-125N(-3)
Volts AC:
120VAC - 60Hz
AMPS - Starting:
1.7
AMPS - Running:
1.1
Combustion Chamber:
4” Black Coated Aluminized
DESIGN COMPLIES WITH:
ANSI Z83.20b-2004-GAS FIRED LOW INTENSITY INFRA-RED HTR.
DETROIT RADIANT PRODUCTS COMPANY
21400 HOOVER ROAD - WARREN, MI
(586) 756-0950 - www.drp-co.com
16” Burner
Tube
Controls
Compartment
DET-40-125N(-3)
DET3-125
Production Code:
7.08
Version:
Data on this label is for the model shown on this label. If your heater has been converted,
this information is not accurate. Please contact the factory for assistance.
BURNER COMPONENTS:
Gas Valve:
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:
HEATER
TYPE:
C1
For parts replacement information, contact factory at 586-756-0950 or visit www.drp-co.com/parts.
(Specify TP-#’s)
36G54-224-N
840
MARK10DX-117
851
3 PCS Harness
852
None
N/A
None
None
N/A
None
IS22010051F5166
264E
Grey (+ / -)
Norton
50
Mid
201B
SAMPLE
4” Gen.
380
Yellow - 24V
828
C1 C2 C3
Orifice Type:
Gas:
19
TP-204#
Air:
1 5/16”
TP-44#191 7/16”
Burner Control Box Component Label
(affixed to center valve compartment lid)
RE-VERBER-RAY INFRA-RED RADIANT TUBE HEATER
®
FOR OUTDOOR USE AND INDOOR (Non-Residential) INSTALLATION ONLY.
Class IIIA Permanent Label
MODEL NO.
DET-40-125N(-3)
Volts AC:
120V - 60Hz
AMPS - Starting:
1.7
AMPS - Running:
1.1
Combustion Chamber:
4” Black Coated Aluminized
DESIGN COMPLIES WITH:
ANSI Z83.20b-2004-GAS FIRED LOW INTENSITY INFRA-RED HTR.
DETROIT RADIANT PRODUCTS COMPANY
21400 HOOVER ROAD - WARREN, MI
(586) 756-0950 - www.drp-co.com
INPUT BTU/H
125,000 / 95,000
Manifold Pressure:
3.5 in.
Maximum Inlet Pressure:
14 in.
Minimum Inlet Pressure:
5.0 in.
SAMPLE
Primary Combustion
Chamber
Serial No.: 0804XXXXXXXXXX 0001
None
Stock:
Add-On:
N/A
On Circuit Board
Diag. Light:
None
40 VA
Fasco Lg.
50Hz - 120V
When Specified
None
None
3 T-plug
6’ Blk. Cord
7/8” FC
None
Special 1:
Special 2:
N/A
826
55A
55B
N/A
N/A
832
333
83
17
1 7/16”
19
1 5/16”
Term. Block:
Transformer:
Fan:
Alt. Fan:
Alt. Fan Usage:
Relay:
Filter:
24 Volt In:
120 Volt In:
Gas In:
Extra VL Orifice:
Internal Use Only:
Electric:
Tag:
LLWT038
None
Rating
Plate
W.C.P.
W.C.P.
W.C.P.
FOR USE WITH
Natural Gas
Heater Type
C1
Minimum Mounting Angle:
045DEGREES
Maximum Mounting Angle:
DEGREES
Serial No.: 0807XXXXXXXXXX 0001
Secondary Combustion
Chamber (if applicable)
Fan
!
Compartment
INSTALLER
AVOID EQUIPMENT FAILURE
THIS 10 FT. TUBE IS THE
COMBUSTION CHAMBER.
The combustion chamber utilizes either 409
stainless, titanium alloy or aluminized steel -
depending on the model number of your heater.
THIS TUBE MUST BE THE FIRST TUBE
F/N: LL01 - Clearance Safety Tag
(Affix adjacent to heater’s thermostat)
Clearance to Combustibles
FOLLOWING THE BURNER CONTROL BOX.
Rotate the tube’s welded seam to bottom.
Consult the manual(s) for further details.
F/N: LLTB004 (orange)
150,000-200,000 Btu/h
models only
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 and vapor in the vicinity 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.
4
DET3 Series
1.0 Safety • Clearance to Combustibles
When installing the tube heater system, clearances to combustibles for the model tube heater and
configuration must be maintained. Refer to Chart 1.1 below to determine the required distances for your model.
Chart 1.1 • Clearance to Combustibles in Inches (see Figure 1.1 for Mounting Angles)
Mounting
Model Number
DET (20, 30, 40) - (65, 75) [N, P] (-3)
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
DET (30, 40) - 100 [N, P] (-3)
with 1 side shield
with 2 side shields
20 ft. from burner
DET (40, 50) - 125 [N, P] (-3)
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
DET (40, 50, 60) - 150 [N, P] (-3)
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
DET (50, 60) - 175 [N, P] (-3)
with 1 side shield 0° 50 8 6 92
with 2 side shields 0° 30 30 6 92
20 ft. from burner 0° 11 11 6 44
DET (50, 60) - 200 [N, P] (-3)
with 1 side shield 0° 54 8 6 94
with 2 side shields 0° 30 30 6 94
20 ft. from burner 0° 11 11 6 44
Heaters mounted on an angle between 0° to 45° must maintain clearances posted for 0° or 45°; whichever is greater.
*
Angle*
0° 9 9 6 60
45° 39 8 10 60
0° 14 14 6 66
45° 39 8 10 66
0° 29 8 6 66
0° 16 16 6 66
0° 7 7 6 30
0° 20 20 6 76
45° 58 8 10 76
0° 24 24 6 81
45° 58 8 10 81
0° 34 34 6 92
45° 63 8 10 92
0° 41 41 6 94
45° 63 8 10 94
Side
Top BelowFront Behind
The stated clearance to combustibles represents a surface temperature of 90ºF (32ºC) above room
temperature. Building materials with a low heat tolerance (such as plastics, vinyl siding, canvas,
tri-ply, etc.) may be subject to degradation at lower temperatures. It is the installer’s responsibility to
assure that adjacent materials are protected from degradation.
Figure 1.1 • Mounting Angles
0° Mounting Angle
Top
45° Mounting Angle
Top
0° Mounting Angle
with 1 Side Shield
(P/N: SSE)
Top
0° Mounting Angle
with 2 Side Shields
(P/N: SSE)
Top
Side
Below
Side
Front
Below
Behind
Front Behind
Below
5
Side Side
Below
2.0 Installation • Gas and Electrical Requirements
!
2.0 Installation
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.
Instructions for the following are detailed in the Tube Heater General Manual:
• Design considerations
• Hanger suspension and placement
• Tube layout and assembly
• Burner control box suspension
• Reflectors (and accessories)
• Venting and combustion air intake
• Gas requirements
• Baffle assembly
DET3 Series
NOTE: Electronic versions of all manuals are available at www.detroitradiant.com
Gas Requirements
Type of Gas
Natural 3.5 inches W.C. 5.0 inches W.C. 14.0 inches W.C.
Liquefied Petroleum 10.0 inches W.C. 11. 0 inches W.C. 14.0 inches W.C.
IMPORTANT: Consult the Tube Heater General Manual for gas connection requirements.
Required Manifold
Pressure
Minimum Inlet
Pressure
Maximum Inlet
Pressure
Electrical Requirements
• 120VAC-60 Hz., single-phase, 3-wire.
• 24VAC thermostat connection.
• Starting current 1.7 amps
• Running current 1.1 amps
NOTICE
Connecting the thermostat with a voltage other than 24VAC may damage the heater. The DET3 Series
requires a 24VAC connection to the thermostat. The DET3 Series is equipped with an internal relay
board. A field supplied external transformer must be installed, see wiring diagram (Figures 2.1A-B).
NOTE: A yellow control wire replaces the external terminal plug on stainless steel models or models with
water resistant upgrades.
6
DET3 Series
NO
installed then the
Neutral = gree
Lo
High =
!
Wiring
Electric Shock
Field wiring to the tube heater must be connected and grounded in accordance with national,
state, provincial, local codes and to the guidelines in the Tube Heater General Manual and Series
Insert Manual. 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.
Figure 2.1 • Field Wiring Diagrams
A. Single Heater, Single Thermostat.
N
24VAC
Low
THERMOSTAT
High
WARNING
Three 1/4 in.
spade terminals
as supplied
24VAC
2.0 Installation • Wiring
To 120VAC grounded outlet.
DET3 BURNER BOX
NOTE: If optional yellow control cord
is installed then the following wire
colors apply:
Neutral = green
Low = white
High = black
Additional wire needed
for thermostats that
require constant power.
B. Multiple Heaters, Single Thermostat.
THERMOSTAT
N
24VAC
Additional wire needed for thermostats
that require constant power.
EXTERNAL TRANSFORMER
TE: If optional yellow control cord is
following wire colors apply:
n
w = white
black
Low
High
(field supplied)
24VAC
120VAC
120VAC
Three 1/4 in.
spade terminals
as supplied
EXTERNAL TRANSFORMER
(field supplied)
120VAC Power (observe polarity)
7
120VAC Power
(observe polarity)
N
To 120VAC grounded outlet.
DET3 BURNER BOX
To 120VAC grounded outlet.
DET3 BURNER BOX
To 120VAC grounded outlet.
DET3 BURNER BOX
N
2.0 Installation • Wiring
L1 120VAC
N
DET3 Series
Before field wiring this appliance - Check existing wiring; replace if necessary.
NOTE: If any of the original wire supplied with the appliance must be replaced, it must be replaced with
wiring material having a temperature rating of at least 105° C.
Figure 2.2 • Internal Wiring Diagrams
A. DET3 Ladder Diagram
Y
LOW
RELAY
BK
BL
R
T- STAT TERMINAL
BLOWER
MOTOR
BKBK
W
PRESSURE
SWITCH
BK BK
B. DET3 Block Diagram
120VAC
N
BK
W
HIGH
RELAY
RELAY
G
LOW
COM
NO
BK
R
THERMOSTAT
NEUTRAL
VALV E
GROUND
HIGH VOLTAGE
NC
BK
NEUTRAL
BK
BL
W
O
ELECTRODE
ASSEMBLY
N.O. PRESSURE
SWITCH
+
120V
24V
R
R
Y
BK
LIGHT
P
M
H
GAS VALV E
BK
BL
W
BL
Y
W
BK
120V-24V TRANSFORMER
BK
R
LIGHT
THERMOSTAT
NEUTRAL
VALV E
GROUND
HIGH VOLTAGE
W
NEUTRAL
Y
CC
HI M
Y
O
R
Y
HIGH
RELAY
NO
COM
NC
R
BL
HI M
GAS VALV E
BURNER
CC
G
O
ELECTRODE
BK
BK
8
DET3 Series
2.0 Installation
This page intentionally left blank.
There are no alternative wiring diagrams for the DET3 Series
9
2.0 Installation • Product Specifications
Specifications
Chart 2.1 • Specifications
DET3 Series
Model Number
DET3-20-65
DET3-20-75
DET3-30-65
DET3-30-75
DET3-30-100
DET3-40-65
DET3-40-75
DET3- 40-100
DET3-40-125
DET3-40-150
DET3-50-125
DET3-50-150
DET3-50-175
Gas Type
(Select One)
N or LP 65,000 50,000 21’-9 ” 13’-1” 120 9’ to 14’ Alum HRT 20.2 5
N or LP 75,000 50,000 21’-9” 13’-1” 120 10’ to 15’ Alum HRT 20.2 5
N or LP 65,000 50,000 31’-5” **17 ’-9 ” 160 10’ to 15’ Alum HRT 30.4 4
N or LP 75,000 50,000 31’-5” **17 ’- 9 ” 160 11’ to 18’ Alum HRT 30.4 5
N or LP 100,000 65,000 31’-5” **17’-9” 160 12’ to 20’ Alum HRT 30.4 5
N or LP 65,000 50,000 41’-1” 22’-9” 190 11’ to 18’ Alum HRT 40.5 3
N or LP 75,000 50,000 41’-1” 22’-9” 190 11’ to 18’ Alum HRT 40.5 4
N or LP 100,000 65,000 41’-1” 22’-9” 190 12’ to 20’ Alum HRT 40.5 4
N or LP 125,000 82,000 41’-1” 22’-9” 190 13’ to 23’ Alum HRT 40.5 5
N or LP 150,000 100,000 41’-1” 22’-9” 190 14’ to 25’ Titan/Alum HRT 40.5 5
N or LP 125,000 82,000 50’-9” **27’-5” 235 15’ to 27’ Alum HRT 50.6 3
N or LP 150,000 100,000 50’-9” **27’-5” 235 15’ to 27’ Titan/Alum HRT 50.6 3
N or LP *175,000 125,000 50’-9” **27’-5” 235 16’ to 30’ Titan/Alum HRT 50.6 3
BTU/h
(High Fire)
BTU/h
(Low Fire)
Straight Length
U-Tube Length
Weight (lbs.)
Recommended
Mounting Heights^
Combustion
Chamber(s) (Black
Coated)
Radiant Emitter
Tube(s) (Uncoated)
Radiant Surface
Area (sq. ft.)
36” Baffle Quantity
DET3-50-200
DET3-60-150
DET3-60-175
DET3-60-200
* Model requires stainless steel tube clamp (P/N: TP-220) to be located at the seam between the primary
combustion chamber and the secondary combustion tube downstream of the burner control box.
** Model requires 5EA-SUB accessory package when installing in a ‘U’ configuration (P/N: TF1B).
^ Factory recommended mounting heights are listed as a guideline.
IMPORTANT: Reference box label to determine the quantity of required baffle sections for each model heater.
HRT = Uncoated hot-rolled steel.
Alum= Black coated aluminized treated steel.
Titan = Black coated titanium stabilized aluminized steel.
N or LP *200,000 145,000 50’-9” **27’-5” 235 17’ to 35’ Titan/Alum HRT 50.6 2
N or LP 150,000 100,000 60’-5” 32’-5” 265 16’ to 30’ Titan/Alum HRT 60.7 2
N or LP *175,000 125,000 60’-5” 32’-5” 265 16’ to 30’ Titan/Alum HRT 60.7 2
N or LP *200,000 145,000 60’- 5” 32’-5” 265 17’ to 35’ Titan/Alum HRT 60.7 2
10
DET3 Series
2.0 Installation • Tube Sequence • Heater Length
Figure 2.4 • Tube Installation Sequence
Important! The combustion chamber(s) & radiant tube section(s) must be installed in the following order.
20 Foot
30 Foot
40 Foot
50 Foot
60 Foot
Aluminized steel secondary combustion chamber location on 150-200 MBH models.
Stainless steel clamp location on 175 - 200 MBH models (P/N: TP-220).
Aluminized steel secondary combustion chamber location on 150-200 MBH models.
Stainless steel clamp location on 175-200 MBH models (P/N: TP-220).
Aluminized steel secondary combustion chamber location on 150-200 MBH models.
Burner Control Box with
16” Burner Tube
Primary Combustion
Chamber Tube
Key
Hot-rolled Steel Radiant
Emitter Tube
Standard Tube Clamp
Secondary Aluminized Steel
Combustion Chamber
(150-200 MBH models only)
Stainless Steel Tube
Clamp (P/N: TP-220)
175-200 MBH models only - Located
between 1st and 2nd 10 ft. tube sections.
Baffle Location
NOTE: Refer to the Tube Heater General Manual, Chart 3.6 (page 23) for secured reflector joints.
11
DET3 Series
!
3.0 Operation • Sequence of Operation • Operational Indicator Light
3.0 Operation
WARNING
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.
NOTE: Reference Tube Heater General Manual for installation requirements.
Sequence of Operation
Two voltages (120VAC supply and 24VAC control) must be supplied to the DET3 Series burner control box
for proper operation.
Starting Circuit: Upon a call for heat, the low fire relay is energized by 24VAC from the thermostat. The
relay is closed sending 120VAC to the blower beginning the sequence of operation.
Air pressure generated by the blower causes the normally open pressure switch to close, sending
power to the ignition module. After a seven-second pre-purge, the spark electrode, transformer and
gas valve are simultaneously energized. The trial for ignition is 15 seconds.
Single Stage Running Circuit: After ignition, the electrode monitors burner flame. If sense of flame is
lost, the control immediately disrupts power to the gas valve and then re-cycle the unit (identical to
the starting sequence). If flame sense is not established within 15 seconds, the heater will attempt
two (2) additional ignition sequences before proceeding to lockout mode. The control can be reset
by briefly interrupting the power source.
Two Stage Running Circuit: High fire operation is actuated by the thermostat sending a 24VAC signal to
the high fire relay. The energized coil of the relay is closed, allowing 24VAC to continue onto the
high fire of the gas valve.
Figure 3.1 • Operational Indicator Light
HOT
- 120V HEATER INPUT -
- 24V HEATER INPUT -
H
HIGH
FIRE
NEUTRAL
EARTH
HIGH
LOW
NEUTRAL
120V
24V
Light 1
Indicates High
Fire Mode
12
DET3 Series
3.0 Operation • Thermostat
Thermostat
NOTE: Different thermostats operate according to their particular features. Refer to thermostat
specifications for details.
DET3 Series heaters require a 24VAC, two stage thermostat to operate. The burner control box is
equipped with a round terminal strip that accepts three (3) 1/4 in. female spade terminals. Do not supply
120VAC to the 24VAC connection.
Example: Desired room temperature is 65° F. The preset differential of the thermostat is 1° F.
The preset differential for High fire mode is 3° F.
When the temperature drops below the Low Fire preset differential of the thermostat (63° F), Low Fire will
activate. If the temperature continues to drop below the preset differential for High Fire, High Fire will
activate bringing the temperature back up to the Low Fire preset quickly.
13
4.0 Troubleshooting Guide
4.0 Troubleshooting Guide
Turn up thermostat.
DET3 Series
Does the fan
blower turn on?
Yes
Does the igniter
spark?
Yes
During the ignition
trial, does the gas
valve open?
No
No
No
Find the source of the
electrical problem.
No
Is the power at the
heater 120VAC?
Replace igniter.
Yes
Is the igniter
physically
damaged?
Test for 24VAC at the gas
valve during valve opening
(typically 10 seconds after
power to the heater). Is
there 24VAC to the valve?
No
Remove obstruction
and lubricate blower.
Yes
Check the gap on the
igniter. Is the gap between
3/16 in. and 1/4 in.?
Is the blower
obstructed?
Adjust gap.
Yes
No
Is 120VAC being sent
Yes
No
No
Yes
Replace 24VAC
transformer.
to the transformer?
Replace
gas valve.
Yes
Does the burner light?
Yes
Continued on page 16.
Yes
No
Yes
Check that gas pressure is within
minumum and maximum inputs
as indicated on the heater’s rating
plate. Is gas pressure ok?
No
Is the valve switch in
the ON position?
Yes
14
No
No
The circuit board and /
or wiring harness
could be faulty. These
should be replaced.
Correct problem.
Switch to the ON
position.
DET3 Series
4.0 Troubleshooting Guide
NOTICE
*
Correct wiring or
replace relay.
Is there 120VAC coming to the
Remove obstruction
Is the inlet or outlet of
the unit obstructed? i.e.
ice, birds nest, dirt, etc.
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.
No
fan from the low fire relay?
Yes
No
Start
Question
Yes
connections to the pressure
The blower is faulty
and must be replaced.
Check for loose wiring
or restrictions in hose
switch. Are they ok?
Key
Process
Question
No
Corrective
Action
Repair wiring or hose
connections.
While the switch is
*
temporarily bypassed,
check for 120VAC from
the switch to the circuit
board. Does 120VAC
enter the circuit board?
No
Faulty wiring.
Repair or
replace wiring.
No
Yes
Replace circuit board.
Yes
The heater is equipped with a safety differential
pressure switch. The switch is a normally
open switch and is located in the air chamber.
Temporarilly place a jumper across the terminal of
the switch. Does the igniter spark?
Yes
Replace the pressure switch after verifying the
following:
• Baffle(s) is in the tube farthest from the burner.
• Heater, blower, squirrel cage, intake and
exhaust are clean and free from dirt and
obstructions.
• The 4 in. dia. air intake pipe does not exceed
20 ft. and/or two elbows.
• There is not a negative pressure experienced
at the area of air intake (i.e. attic space, high
winds, very tight buildings, etc.)
If any of the above were occurring, please
address the problem.
15
4.0 Troubleshooting Guide
Continued from page 14.
DET3 Series
Does the burner
stay on?
Yes
Does the heater stay on
until the call for heat ends?
Check that gas pressure is within minimum and maximum inputs as
indicated on the heater’s rating plate. Is gas pressure ok?
No
Check that gas supply pressure meets
minimum and maximum requirements.
Correct problem.
No
No
Does the burner
stay on briefly and
then shut off?
Yes
Is the heater properly
grounded? Is the
polarity correct?
No
Check the gap on the
igniter. Is the gap between
3/16 in. and 1/4 in. ?
No
Adjust gap.
Yes
Yes
Yes
No
Yes
Troubleshooting ends.
The following can cause the heater to shut down:
• Improper grounding.
• High winds.
• Taking combustion air from the attic.
• Dirty environment.
• Baffle not located properly.
• Fluctuating gas pressure.
Flame Current Check: Single Spark & Sense
To measure flame current, disconnect input voltage, then insert a 0-50 μA DC meter and capacitor in series with the
spark electrode as shown below. Reconnect input voltage and initiate call for heat. After sparking is complete and
flame is established, meter should read 1.0 μA or higher while flame is established. If meter reads below “0” on the
scale, meter leads are reversed. Disconnect power and reconnect meter lead for proper polarity.
16
DET3 Series
Were the gas lines
purged of air?
Yes
Check the gap
on the igniter.
Is the gap between
1/8 in. and 3/16 in.?
No
4.0 Troubleshooting Guide
Adjust gap.
No
No
Is the differential
switch in the
closed position?
Check that gas pressure is within
minumum and maximum inputs
as indicated on the heater’s rating
plate. Is gas pressure ok?
Purge gas lines.
Differential switch may be
faulty or there is a restriction
in the exhaust or intake.
Yes
Yes
Differential switch may be faulty or there
is a restriction in the exhaust or intake.
No
Check for damaged
insulation or loose
terminals on the
high voltage spark wire.
Is it ok?
No
Correct problem.
Yes
Replace.
Check the spark
electrode. Is the
ceramic cracked
or loose?
Yes
Replace electrode.
Electrode sensing may be
faulty or flame signal may
be weak. Check that heater
is operating at proper gas
pressure as indicated on
the rating label. Clean or
replace electrode if needed.
No
If heater does not enter high fire mode, check the following:
NOTE: To confirm the heater is not in high-fire mode, check the manifold pressure (3.5 inches W.C. natural gas or 10
inches W.C. propane gas). If the indicator light is not illuminated, it is faulty and should be replaced. If the manifold
pressure ranges from 2.3 to 2.8 inches W.C. natural gas (model dependent) and 6.0 to 7.5 inches W.C. propane gas
(model dependent), the heater is in low fire mode and the troubleshooting steps described below should be followed.
Check for 24VAC across the
COM and HIGH on the 24VAC
terminal. Is there 24VAC?
Yes
Is there 24VAC across
the red wire on the
relay board and ground
on the circuit board?
Yes
Replace
gas valve.
No
Repair or replace faulty
wiring or thermostat
Replace
relay.
No
17
5.0 Parts • Heater Components and Parts List
5.0 Parts
Figure 5.1 • Burner Assembly Components
3098
DET3 Series
3097A
3002A
3094
331
3099
84
83
333
Chart 5.1 • Parts List
3060
245
3008A
1325
68B
70
3140, 3141
212
76
3051
3052
85
25
832
828
331
219
826
550
3010
3033B
70A
3044
332
31D
204
3096A
1018
264D/F,1264A
3093
3014
3001
10A
3004
3011
217
9
3055
583
221
3012
3094
3005A
3072, 3071, 201B
55A
321
5
3003A
14
15
16
21B
3580
17
Part # Description Part # Description
TP-5 Flange Gasket TP-76 Rubber Grommet
TP-9 Conduit Coupling TP-82 Reflector Center Support
TP-10A Conduit 4” x 3/4” TP-83 Stainless Steel Flexible Gas Connector
TP-14 Sight Glass Gasket TP-84 1/2 in. Female/Male Flare Fitting
TP-15 Sight Glass TP-85 1/2 in. Male / Male Flare Fitting
TP-16 Sight Glass Washer TP-105 Reflector End Cap
TP-17 Sight Glass Kit TP-106 Reflector End Cap Clips
TP-20C 10 ft. Aluminum Reflector TP-201B V.3 Mid Burner (Color Code - TAN)
TP-20D* 10 ft. Stainless Steel Reflector TP-204 Gas Orifice - Consult Factory
TP-21B 4 in. Tube Clamp TP-212 1/2” x 3” Pipe Nipple
TP-25 1/4 in. Female Spade Terminal
TP-26A 10 ft. Aluminized Combustion Tube TP-219 Differential Vinyl Sensing Tube
TP-26B 10 ft. Titanium Primary Combustion Tube TP-220 4 in. Dia. Stainless Steel Tube Clamp
TP-26C 10 ft. Uncoated Hot Rolled Radiant Tube TP-221 Spark Igniter Mounting Bracket Gasket
TP-31D Mounting Bracket
TP-55A Fan Blower TP-264D Differential Pressure Switch, 60 to 75 MBH
TP-65I 36 in. Interlocking Turbulator Baffle Section TP-264F Differential Pressure Switch, 150 to 200 MBH
TP-68B Large Strain Relief Bushing TP-321 Ignition Plate Gasket
TP-70 1/2 in. Control Box Gasket
TP-70A 1 in. Control Box Gasket (6 inches) TP-332 Divider Grommet
* Optional upgrade or add-on item.
(Qty. 2) TP-245 3/16” X 1/8” Plastic Gas Valve 90° Vent
(Qty. 3) TP-217 Brass Pressure Switch Barb Fitting
(10.3 inches) TP-331 Green Self-Tap Ground Screw (Qty. 2)
(8 pcs.)
18
DET3 Series
Figure 5.2 • Tube & Reflector Components
5.0 Parts • Heater Components and Parts List
579
106
20C/D*
105
26A/B
21B, 220
105
82
26A/C
65I
Part # Description Part # Description
TP-333 6 ft. Black 120VAC Power Cord TP-3033B DET3 Power Entry Plate
TP-550 Spark Transfer Wire - Orange TP-3044 Gas Manifold
TP-579 4 in. Wire Hanger TP-3051 35-72 DSI Circuit Board
TP-583 Spark Igniter Plate TP-3052 Wiring Harness
TP-826 40VA Transformer TP-3055 Spark Igniter Electrode
TP-828 Yellow 24VAC High Fire Indicator Light TP-3060 Pressure Switch Mounting Bracket
TP-832 Thermostat Terminal Strip TP-3071 High BTU Burner (Color Code - PURPLE)
TP-1018 APS 1/4 in. Silicone Sensing Tube TP-3072 Low BTU Burner (Color Code - GREEN)
TP-1264A Differential Pressure Switch, 100 to 125 MBH TP-3093 #8-32 Cage Nut
TP-1325 24VAC Switching Relay (Qty. 2) TP-3094 #8-32 x ½ in. Black Nylon Shoulder Screw (Qty. 4)
TP-3001 Divider Panel TP-3096A Valve Compartment Bottom Panel
TP-3002A Plastic Control Compartment End Panel TP-3097A Valve Compartment Top Panel
TP-3003A Plastic Fan Compartment End Panel TP-3098 Valve Compartment Side Panel
TP-3004 Main Control Box Panel TP-3099 Controls Mounting Panel
TP-3005A Plastic Valve Compartment Lid TP-3140 36G54-224 Gas Valve - Natural Gas Assembly
TP-3008A Gas Valve Mounting Bracket TP-3141 36G54-226 Gas Valve - LP Gas Assembly
TP-3010 Service Panel Hinge TP-3580 16 in. DSI Burner Tube Flange with Fittings
TP-3011 Spark Igniter Box
TP-3012 Spark Igniter Box Cover
TP-3014 Plastic Air Orifice w/ Screen - Contact Factory
(Qty. 4)
* Optional upgrade or add-on item.
19
5.0 Parts • Kit Contents Check List
Kit Contents Check List
Chart 5.2 • Kit Contents for DET3 Series - Reference the length column for your model.
DET3 Series Kit Contents
DET3 Series
TP-579 4 in. Hanger
TP-83 24 in. Stainless
Steel Flex. Gas Connector
TP-82 4 in. Reflector
Center Support (RCS)
TP-21B 4 in. Tube Clamp
TP-25* 1/4 in. Female
Spade Terminals
TP-105 Reflector End Cap
TP-106 Reflector
End Cap Clips
General Manual and
DET3 Series Insert
F/N: LIOGT3 & LIODET3
Tub e H eater
General Manual
DET3 Series
Insert Manual
Part No. Description 20 ft. 30 ft. 40 ft. 50 ft. 60 ft.
TP-21B 4 in. Tube Clamps 2 3 4 5** 6**
TP-25* 1/4 in. Female Spade Terminals* 3 3 3 3 3
TP-82 4 in. Reflector Center Support 1 1 1 1 1
TP-83 24 in. S.S. Flexible Gas Connector 1 1 1 1 1
TP-105 Reflector End Caps 2 2 2 2 2
TP-106 Reflector End Cap Clips 8 8 8 8 8
TP-579 4 in. Wire Hanger 3 4 5 6 7
LIOGT3 Tube Heater General Manual 1 1 1 1 1
LIODET3 DET3 Series Insert Manual 1 1 1 1 1
Filled By:
* Not included when heater is equipped with yellow control cord.
** One 4” stainless steel tube clamp (P/N: TP-220) is provided for each 175,000 - 200,000 BTU model.
Place as shown on page 11.
Approvals
• CSA
• Commercial approval.
Limited Warranty
• 1 year - Burner box components.
• 2 years - Combustion and radiant tubes.
• 3 years - Stainless steel burner.
• See page 36 of the General Tube Heater Manual
for Terms and Conditions.
© 2012 Detroit Radiant Products Co.
21400 Hoover Road • Warren, MI 48089
Phone: 586-756-0950 • Fax: 586-756-2626
www.detroitradiant.com • sales@drp-co.com
Printed in U. S. A.
20
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