Brant Radiant Heaters DX3 Series User manual

!
WARNING
For Your Safety
If you smell gas:
• Open windows.
• Do not touch electrical switches.
• Extinguish any open flame.
• Immediately call your gas supplier from a
neighbours phone.
• Do not try to light any appliances.
Keep these instructions for future reference.
Not for residential use! This heater is NOT approved for use in any residential application.
This includes, but is not limited to, attached garages, solariums, living quarters, etc.
Installation in residential spaces may result in property damage, asphyxiation, serious injury
or death. Consult your local fire marshall and/or insurance carrier if unsure of your
application.
Interdit pour usage résidentiel. Ne pas utiliser cet appareil à la maison, dan les chambres
à coucher, dan les harages attenants, etc.
This is NOT an explosion proof heater. Where there is a possibility of exposure to flammable
vapors, consult the local fire marshall, the fire insurance carrier and other authorities for
approval of proposed installation.
Cet émetteur n’est pas un appareil antideflagrant. Lorsqu’il y a risque de contact avec des
vapeurs inflammables, consulter le commissaire local des incendies, la compagnie
d’assurance incendie ou tout autre authorité compétente pour approbation de l’installation.
Storage of gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance may result in fire or explosion. Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other appliance. Always maintain published
clearance to combustibles.
Il est interdit d’utiliser des liquides inflammables ou degagent des vapeors inflammabled a
proximaite de tout appareil fonctionnant au gaz.
Brant Radiant Heaters, Ltd.
Form#: LIOBRDX3 911
DX3 Series
Gas-Fired Infrared Tube Heater
Consignes De Sécurité
Si vous sentez une odeur de gaz:
• Ouvrez les fenêtres.
• Ne touches pas aux interrupters électriques.
• Éteignez toute flamme nue.
• Contactez immediatement votre compagnie de gaz.
WARNING: Improper installation, adjustment, alteration, service or
maintenance can cause property damage, injury or death. Read the
installation, operating and maintence instructions thoroughly before
installing or servicing this equipment.
AVERTISSEMENT. Une installation, un réglage, une modification, une
réparation ou un entretien incorrect peut entraîner des dommages matériel,
des blessures ou la mort. lisez attentivement les instructions d’installation, de
fonctionnement et d’entretien avant de procéder à l’installation ou à l’entretien
de cet équipement.

2
DX3 Series
Contents
1.0 Introduction .....................................................................3
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Heater Components..........................................................3
Product Specifications........................................................3
2.0 Safety ..........................................................................4
Warning Symbols............................................................4
Applications................................................................4
Standards, Certifications and Government Regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Safety Labels and Locations...................................................6
Clearance to Combustibles....................................................8
3.0 Installation ......................................................................10
Design Considerations and Prechecks...........................................10
Recommended Mounting Heights and Coverages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Hanger Placement and Suspension .............................................12
Radiant Tube Assembly.......................................................16
Optional Elbow or U-Bend Accessory Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Burner Control Box Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Reflector Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Baffle Assembly and Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Final Heater Assembly .......................................................23
Venting ...................................................................24
Sidewall (Horizontal) Venting...................................................25
Roof (Vertical) Venting........................................................26
Optional Unvented Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Combustion Air Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Allowances for Expansion.....................................................34
Electrical Requirements.......................................................35
Wiring.....................................................................36
4.0 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Sequence of Operation .......................................................40
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Operational Indicator Lights....................................................41
5.0 Troubleshooting Guide............................................................42
6.0 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Routine Inspection...........................................................46
Heater Components and Parts List..............................................48
7.0 Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.0 Kit Contents Check List ...........................................................52
PLEASE NOTE PART NUMBER PHASE OUT

3
DX3 Series 1.0 Introduction • Overview • Product Specifications • Heater Components
1.0 Introduction
Overview
The intent of this manual is to provide information regarding general safety, installation, operation and
maintenance of the tube heater. You must read, and understand, the instructions and safety warnings in
this manual before installing the tube heater. Additional literature on this and other products is available
at www.brantradiant.com.
Heater Components
Prior to installation, verify that the heater’s gas type and voltage (as listed on the rating plate) match that
of your application. Also verify that you have received all heater contents included with your tube heater.
Reference page 52 for a list of the kit contents for your model heater. Materials not included in the heater
kit contents (e.g., screws, vent material, terminals, etc.) are the responsibility of the installer. Notify your
product representative or Brant Radiant Heaters Ltd. of any discrepancy or missing kit contents prior to
installing unit.
Product Specifications
Chart 1.1 • DX3 Series Specifications
Model Number Gas Type (select one) BTU/h Straight Length U-Tube Length Standard Weight (lbs.) Stainless Steel Weight (lbs.) Recommended Mounting Height Combustion Chamber (Black Coated) Radiant Emitter Tube(s) (Black Coated) Radiant Surface Area (sq. ft.) 36” Baffle Quanitity
DX3-20-50 N or LP 50,000 21’-9” 13’-1” 120 N/A 9’ to 15’ Alum Alum 20.2 5
DX3-20-60 N or LP 60,000 21’-9” 13’-1” 120 N/A 10’ to 15’ Alum Alum 20.2 5
DX3-20-75 N or LP 75,000 21’-9” 13’-1” 120 145 11’ to 18’ Alum Alum 20.2 5
DX3-30-50 N or LP 50,000 31’-5” **17’-9” 160 N/A 10’ to 15’ Alum Alum 30.4 4
DX3-30-60 N or LP 65,000 31’-5” **17’-9” 160 N/A 11’ to 18’ Alum Alum 30.4 4
DX3-30-75 N or LP 75,000 31’-5” **17’-9” 160 195 12’ to 20’ Alum Alum 30.4 5
DX3-30-100 N or LP 100,000 31’-5” **17’-9” 160 195 13’ to 23’ Alum Alum 30.4 5
DX3-30-125 N or LP 125,000 31’-5” **17’-9” 160 195 14’ to 25’ Alum Alum 30.4 6
DX3-40-50 N or LP 50,000 41’-1” 22’-9” 190 N/A 11’ to 18’ Alum Alum 40.5 3
DX3-40-60 N or LP 65,000 41’-1” 22’-9” 190 N/A 11’ to 18’ Alum Alum 40.5 3
DX3-40-75 N or LP 75,000 41’-1” 22’-9” 190 235 12’ to 20’ Alum Alum 40.5 4
DX3-40-100 N or LP 100,000 41’-1” 22’-9” 190 235 13’ to 23’ Alum Alum 40.5 4
DX3-40-125 N or LP 125,000 41’-1” 22’-9” 190 235 14’ to 25’ Alum Alum 40.5 5
DX3-40-150 N or LP 150,000 41’-1” 22’-9” 190 235 15’ to 27’ Titan Alum 40.5 5
DX3-40-175 N or LP *175,000 41’-1” 22’-9” 190 235 16’ to 30’ Titan Alum 40.5 5
DX3-50-100 N or LP 100,00 50’-9” **27’-5” 235 290 15’ to 27’ Alum Alum 50.6 3
DX3-50-125 N or LP 125,000 50’-9” **27’-5” 235 290 15’ to 27’ Alum Alum 50.6 3
DX3-50-150 N or LP 150,000 50’-9” **27’-5” 235 290 16’ to 30’ Titan Alum 50.6 3
DX3-50-175 N or LP *175,000 50’-9” **27’-5” 235 N/A 17’ to 35’ Titan Alum 50.6 3
DX3-50-200 N or LP *200,000 50’-9” **27’-5” 235 N/A 18’ to 40’ Titan Alum 50.6 2
DX3-60-125 N or LP 125,000 60’-5” 32’-5” 265 300 16’ to 30’ Titan Alum 60.7 2
DX3-60-150 N or LP 150,000 60’-5” 32’-5” 265 330 17’ to 35’ Titan Alum 60.7 2
DX3-60-175 N or LP *175,000 60’-5” 32’-5” 265 N/A 17’ to 35’ Titan Alum 60.7 2
DX3-60-200 N or LP *200,000 60’-5” 32’-5” 265 N/A 18’ to 40’ Titan Alum 60.7 2
DX3-70-175 N or LP * 175,000 70’-1” **37’-3” 300 N/A 19’ to 42’ Titan Alum 70.9 2
DX3-70-200 N or LP * 200,000 70’-1” **37’-3” 300 N/A 19’ to 42’ Titan Alum 70.9 2
DX3-80-200 N or LP * 200,000 79’-9” 42’-1” 330 N/A 20’ to 45’ Titan Alum 81.0 2
* 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 two 5’ tube assemblies in place of a 10’ when installing in a ‘U’ configuration (P/N: TF1B).

2.0 Safety
Warning indicates a potentially hazardous situation
which, if not avoided, could result in death or injury.
Caution indicates a potentially hazardous situation
which, if not avoided, could result in minor or
moderate injury.
Notice indicates a potentially hazardous situation
which, if not avoided, could result in property
damage.
NOTICE
WARNING
!
CAUTION
!
WARNING
!
WARNING
!
Warning Symbols
Safety is the most important consideration during installation, operation and maintenance of the tube
heater. You will see the following symbols and signal words when there is a hazard related to safety or
property damage.
This heater must be installed and serviced by a trained gas installation and service
personnel only! 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.
Applications
This is not an explosion proof heater. No tube heater may be used in a Class 1 or Class 2 Explosive
Environment. Consult your local fire Marshall, insurance carrier and other authorities for approval if the
proposed installation is in question.
Commercial / Industrial
Unless otherwise indicated, tube heaters are designed and certified for use in industrial and commercial
buildings, such as warehouses, manufacturing plants, aircraft hangars and vehicle maintenance shops.
For maximum safety the building must be evaluated for potential problems before installing the heating
system. A critical safety factor to consider before installation is the clearance to combustibles.
Not For Residential Use. Installation of a commercial tube heater system in residential indoor spaces
may result in property damage, serious injury or death.
4
DX3 Series
2.0 Safety • Warning Symbols • Applications

5
DX3 Series
Standards, Certifications and Government Regulations
Installation of this tube heater must comply with all applicable local, provicial and national specifications,
regulations and building codes. Contact the local building inspector and/or fire marshall for guidance.
In the absence of local codes, the installation must conform to the latest edition of CAN/CGA B149.1
Canadian Electrical Code C22.1
Building Type
Public Garages:
This heater must be installed in accordance with the latest edition of CAN/CGA B149.1.
• Heaters must not be installed less than 8 ft. (2.4 m) above the floor. Minimum clearances to
combustibles must be maintained from vehicles parked below the heater.
• When installed over hoists, minimum clearances to combustibles must be maintained from the upper
most point of objects on the hoist.
Aircraft Hangars:
This heater must be installed in accordance with the latest edition of CAN/CGA B149.1.
• In areas adjoining the aircraft storage area (e.g., shops, offices) the bottom of heaters shall be
installed no less than 8 ft. (2.4 m) above the floor.
• Suspended or elevated heaters shall be located in spaces where they shall not be subject to damage
by aircraft, cranes, movable scaffolding or other objects.
Provisions shall be made to assure accessibility to suspended tube heaters for recurrent maintenance
purposes.
Building Location
High Altitude:
Installation of this tube heater is approved, without modifications, for elevations up to 6,000 feet (1,829 m)
MSL (sea level). Contact the factory for installations above these elevations.
The type of gas appearing on the nameplate must be the type of gas used. Installation must comply with
national and local codes and requirements of the local gas company.
Non-Standard BTU Gas:
Unless otherwise noted on the rating plate, this infrared heater is designed and orificed to operate on
standard BTU gas. Contact the factory if utilizing non-standard BTU gas.
Building Aspect
Electrical:
The tube heater must be electrically grounded in accordance with the Canadian Electrical Code
CSA C22.1 Part 1 (latest edition).
Venting:
Venting must be installed in accordance with the requirements within this manual and to
CAN/CGA B149.1 Installation Codes for Gas Burning Appliances.
2.0 Safety • Standards, Certifications and Government Regulations

6
DX3 Series
VALVE
NEUTRAL
EARTH
HOT
- 120V HEATER INPUT -
120V
NEUTRAL
EARTH
HOT
- 120V HEATER INPUT -
120V
NEUTRAL
N
24V
- INTERNAL RELAY -
- FIELD SUPPLY 24V -
7”-14”
18cm-36cm
9”-14”
23cm-36cm
9”-14”
23cm-36cm
Correct Method
Wrong Method
Side View Front View
Side View Front View
1/2” Gas Connection
V
VALVE
Air Metering Orifice
Air Metering Orifice
DO NOT REMOVE
TP-114
TP-3014 1 - 1/2"
SAMPLE
SERVICE ACCESS PANEL
CONTROLS & GAS VALVE COMPARTMENT
1. Disconnect gas & electricity.
2. Remove four (4) thumbscrews.
3. Remove top cover.
4. Swing hinged panel downward.
 R  . R R SR .
SERVICE ACCESS PANEL
IGNITER & FLAME SENSE COMPARTMENT
1. Disconnect gas & electricity.
2. Remove cover by lifting top
cover upward and outward.
CAUTION: HOT SURFACE.
 R  . R R SR .
SERVICE ACCESS PANEL
FAN COMPARTMENT
1. Disconnect gas & electricity.
2. Remove top cover ( thumbscrews).
3. Remove tsi () 4 screws.
4. ift and remove panel.
 R  . R R SR .
Safety Labels and Their Locations
Back Panel
Top Panel
Bottom Panel
Clearance to Combustibles Labels
Logo Label
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.
(Models with
24VAO Option)
(Operational Indicator
Lights)
2.0 Safety • Safety Labels and Locations
7”-14”
18cm-36cm
9”-14”
23cm-36cm
9”-14”
23cm-36cm
Correct Method
Wrong Method
Side View Front View
Side View Front View
1/2” Gas Connection
Gas Connection Label
Do Not Rotate Heater

7
DX3 Series
MODEL /MODELE NO.
DX-40-125N(-3)
INPUT BTU/H
125,000
FOR USE WITH
NATURAL GAS
RADIATEUR A INFRAROUGE A FAIBLE INTENSITE
VOLTS A.C.
STARTING AMPS.
RUNNING AMPS.
120~60Hz
4.8
1.1
MANIFOLD PRESSURE
MIN. INLET PRESSURE
ORIFICE SIZE
3.5” WC
5.0” WC
#3 D.M.S
HEATER TYPE
VERSION
MIN. MOUNTING ANGLE:
COMBUSTION CHAMBER:
4” BC TITANIUM
FOR INDOOR USE
BRANT RADIANT HEATERS LIMITED
34 SCOTT AVE., PARIS, ONTARIO
TEL: [phone] WWW.BRANTRADIANT.COM
ANSI Z83.20b - 2011 CSA 2.32b - 2011 Low - Intensity Infrared Htr.
ANS Z83.20b - 2011 CSA - 2011 Low - Intensity Infrared Htr.
SERIAL NO.
0870 XXXX XXXX 0001
RE-VERBER-RAY LOW INTENSITY INFRARED HEATER
FOR INDOOR INSTALLATION ONLY. NOT FOR USE IN RESIDENTIAL DWELLING.
INSTALLATION À L’EXTÉRIEUR SEULEMENT. NE PAS INSTALLER DANS UN LOGEMENT.
MAX. MOUNTING ANGLE:
0 DEGREES
45 DEGREES
FOR STAINLESS STEEL UPGRADES THE
COMBUSTION TUBE IS UPGRADED TO 409
STAINLESS STEEL.
C1
10/11
LIGHTING INSTRUCTIONS
1. PURGE MAIN GAS SUPPLY LINE.
2. ROTATE HEATER’S MANUAL GAS
VALVE KNOB TO “ON” POSITION.
3. CLOSE ELECTRICAL CIRCUIT.
4. IF HEATER FAILS TO LIGHT, TURN
OFF GAS AND WAIT 5 MINUTES
BEFORE REPEATING ABOVE.
INSTRUCTIONS POUR L’ALLUMAGE
1. PURGER LA CONDUITE D’ALIMENTATION
EN GAZ PRINCIPALE.
2. TOURNER LE BOUTON DU ROBINET
DE GAS A COMMANDE MANUELLE
JUSQU’A CE QU’IL SE TROUVE EN
POSITION DE MARCHE (“ON”)
3. FERMER LE CIRCUIT ELECTRIQUE.
4. SI L’APPAREIL DE CHAUFFAGE NE
S’ALLUME PAS, ATTENDRE 5 MINUTES
AVANT DE SUIVRE DE NOUVEAU LES
INSTRUCTIONS CI-DESSUS.
TO SHUT DOWN
1. ROTATE HEATER’S MANUAL GAS
VALVE KNOB TO “OFF” POSITION.
2. OPEN ELECTRICAL CIRCUIT.
POUR ETEINDRE L’APPAREIL
1. TOURNER LE BOUTON DU ROBINET
DE GA A COMMANDE MANUELLE
DE L’APPAREIL DE CHAUFFAGE
USU’A CE U’IL DE TROUVE EN
POSITION D’ARRET “OFF”.
2. OUVRIR LE CIRCUIT ELECTRIUE.
BRANT RADIANT HEATERS LIMITED
34 SCOTT AVENUE, PARIS ON. N3L 3R1
TELEPHONE 5144223
WWW.BRANTRADIANT.COM
Rating
Plate
Controls Compartment
Fan Compartment
Combustion Chamber
MODEL /MODELE NO. INPUT BTU/H FOR USE WITH
NATURAL GAS
RADIATEUR A INFRAROUGE A FAIBLE INTENSITE
VOLTS A.C.
STARTING AMPS.
RUNNING AMPS.
120~60Hz
4.8
1.1
MANIFOLD PRESSURE
MIN. INLET PRESSURE
ORIFICE SIZE
3.5” WC
5.0” WC
#3 D.M.S
HEATER TYPE
VERSION
MIN. MOUNTING ANGLE:
COMBUSTION CHAMBER:
4” BC ALUMINUM
FOR INDOOR USE
BRANT RADIANT HEATERS LIMITED
34 SCOTT AVE., PARIS, ONTARIO
TEL: [phone] WWW.BRANTRADIANT.COM
ANSI Z83.20b - 2011 CSA 2.32b - 2011 Low - Intensity Infrared Htr.
ANS Z83.20b - 2011 CSA - 2011 Low - Intensity Infrared Htr.
SERIAL NO.
0870 XXXX XXXX 0001
RE-VERBER-RAY LOW INTENSITY INFRARED HEATER
FOR INDOOR INSTALLATION ONLY. NOT FOR USE IN RESIDENTIAL DWELLING.
INSTALLATION À L’EXTÉRIEUR SEULEMENT. NE PAS INSTALLER DANS UN LOGEMENT.
MAX. MOUNTING ANGLE:
0 DEGREES
45 DEGREES
FOR STAINLESS STEEL UPGRADES THE
COMBUSTION TUBE IS UPGRADED TO 409
STAINLESS STEEL.
C1
10/11
HL3-40-125N 125,000/95,000
HL3
SERVICE ACCESS PANEL
SERVICE ACCESS PANEL
COMPARTIMENT VENTILATEUR
FAN COMPARTMENT
1. Disconnect gas & electricity.
2. Remove top cover
(2 thumbsscrews).
3. Remove six (6) 1/4” screws.
4. Lift and remove panel.
1. Débrancher le gaz et l’electricité.
2. Retirer les 2 vis à main du couvercle
supérieur.
3. Retirer les 6 vis 1/4 po.
4. Soulever et retirer le panneau.
GARDER LE COUVERCLE EN PLACE. NE L’ENLEVER QUE POUR L’ENTRETIEN.
Radiant Tube(s)
2.0 Safety • Safety Labels and Locations
16” Burner Tube
SAMPLE
Lighting /Shut Down Instructions Label
Yellow Titanium Alloy Tag
(150,000 BTU/H models and greater)
F/N: LLTB024LF/N: LLTB026
F/N: LLTB025R

Clearance to Combustibles
• Paint
• Parked vehicles
• Gasoline
• Storage racks
Combustible items: Moving Objects:
• Wood • Overhead doors
• Paper • Vehicle lifts
• Fabric • Cranes
• Chemicals • Hoists
A critical safety factor to consider before installation is the clearances to combustibles. Clearance to
combustibles is defined as the minimum distance you must have between the tube surface, or reflector,
and the combustible item . Considerations must also be made for moving objects around the tube heater.
The following is a partial list of items to maintain clearances from:
• Vehicle parking areas
• Vehicles with lifts or cranes
• Storage areas with stacked materials
• Lights
• Sprinkler heads
• Overhead doors and tracks
• Dirty, contaminated environment
• Gas and electrical lines
• Combustible and explosive materials
• Chemical storage areas
• Areas of high chemical fume concentrations
• Provisions for accessibility to the heater
• Adequate clearances around air openings
• Combustion and ventilating air supply
Hazards:
For maximum safety the building must be evaluated for hazards before installing the heating system.
Examples of hazards include, but are not limited to:
IMPORTANT: Fire sprinkler heads must be located at an appropriate distance from the heater to avoid an
inadvertent discharge. This distance may exceed the published clearance to combustibles. Certain
applications may require the use of high temperature sprinkler heads or the relocation of the heaters.
Fire sprinkler systems containing propylene glycol, antifreeze or other potentially flammable substances
shall not to be used in conjunction with this heater without careful consideration for and avoidance of
inadvertent discharge hazards. For further information consult NFPA 13. Always observe applicable
provinces and local codes.
CAUTION
!
If you are unsure of the potential hazards, consult your local fire Marshall, fire insurance carrier or other
qualified authorities on the installation of gas fired tube heaters for approval of the proposed installation.
8
DX3 Series
2.0 Safety • Clearance to Combustibles
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 of the heater.

When installing the tube heating system, the minimum clearances to combustibles for your model tube heater and
system configuration must be maintained. Refer to Chart 2.1 below to determine the required distances for your model.
Model Number
Mounting
Angle*
Sides
Front Behind Top Below
DX3 (20, 30, 40) - (50, 60) [N, P] 0° 22.86 22.86 15.24 119.38
45° 99.06 20.32 25.4 119.38
with 1 side shield 0° 73.66 20.32 15.24 119.38
with 2 side shields 0° 22.86 22.86 15.24 119.38
20 ft. from burner 0° 17.78 17.78 15.24 76.2
DX3 (20, 30, 40) - 75 [N, P] 0° 22.86 22.86 15.24 152.4
45° 99.06 20.32 25.4 152.4
with 1 side shield 0° 73.66 20.32 15.24 152.4
with 2 side shields 0° 40.64 40.64 15.24 152.4
20 ft. from burner 0° 17.78 17.78 15.24 76.2
DX3 (30, 40, 50) - 100 [N, P] 0° 35.56 35.56 15.24 167.64
45° 99.06 20.32 25.4 167.64
with 1 side shield 0° 73.66 20.32 15.24 167.64
with 2 side shields 0° 40.64 50.8 15.24 167.64
20 ft. from burner 0° 17.78 17.78 15.24 76.2
DX3 (30, 40, 50, 60) - 125 [N, P] 0° 50.8 50.8 15.24 193.04
45° 147.32 20.32 25.4 193.04
with 1 side shield 0° 106.68 20.32 15.24 193.04
with 2 side shields 0° 58.42 58.42 15.24 193.04
20 ft. from burner 0° 27.94 27.94 15.24 111.76
DX3 (40, 50, 60) - 150 [N, P] 0° 60.96 60.96 15.24 205.74
45° 147.32 147.32 25.4 205.74
with 1 side shield 0° 106.68 106.68 15.24 205.74
with 2 side shields 0° 58.42 58.42 15.24 205.74
20 ft. from burner 0° 27.94 27.94 15.24 111.76
DX3 (50, 60, 70) - 175 [N, P] 0° 86.36 86.36 15.24 233.68
45° 160.02 20.32 25.4 233.68
with 1 side shield 0° 137.16 20.32 15.24 233.68
with 2 side shields 0° 76.2 76.2 15.24 233.68
20 ft. from burner 0° 27.94 27.94 15.24 111.76
DX3 (50, 60, 70,80) - 200 [N, P] 0° 104.14 104.14 15.24 238.76
45° 160.02 20.32 15.24 238.76
with 1 side shield 0° 137.16 20.32 25.4 238.76
with 2 side shields 0° 76.2 76.2 25.4 238.76
20 ft. from burner 0° 27.94 27.94 25.4 111.76
2.0 Safety • Clearance to Combustibles
Chart 2.1 • Clearance to Combustibles in Centimeters (see Figure 2.1 for Mounting Angles)
Figure 2.1 • 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
Below
Top
Front Behind
Top
Side Side
Top
* Heaters mounted on an angle between 0° to 45° must maintain clearances posted for 0° or 45°; whichever is greater.
Below Below
9
DX3 Series

3.0 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.
Design Considerations and Prechecks
Placement of infrared heaters is influenced by many factors. Aside from safety factors, considerations
such as the number of heater or vent elbows that are allowed, maximum vent lengths, ducting of
combustion air and combining exhaust vents are a few examples. This installation manual, along with
national, provincial and local codes address these issues. It is critical that you read, understand and
follow all guidelines and instructions.
To ensure a properly designed heating system, a layout should be developed for the correct placement of
the burner control box, tubes, vents and combustion air intake ducts. Inspect and evaluate the mounting
conditions, vent locations, gas supply and wiring.
When designing an infrared radiant heating system, consider the following:
• Has the building’s heat loss been evaluated?
• Does the design meet the needs of the space?
• Have recommended mounting heights been observed?
• Have all clearance to combustibles situations been observed?
• Is the supply (burner) end of the heater located where more heat is required?
• Is it best to offset the heaters and/or rotate the reflectors towards the heat zone?
• Are extra guards, side shields, ‘U’ or ‘L’ reflector covers required?
• Does the heater require outside fresh air for combustion?
• Is the environment harsh or contaminated (requiring outside air for combustion)?
• Are chemicals or vapors a concern (requiring outside air for combustion or additional ventilation)?
When heated, materials high in hydrocarbons (solvents, paint thinner, mineral spirits, formaldehydes, etc.)
can evaporate. This may result in odors or fumes being emitted into the environment. To correct this
problem, clean the area and/or introduce additional ventilation. The heaters themselves, when installed
and serviced in accordance with the installation manual, do not emit foul odors into the environment.
10
DX3 Series
3.0 Installation • Design Considerations and Prechecks

11
DX3 Series 3.0 Installation • Recommended Mounting Heights and Coverages
Dim. C
Chart 3.1 • Recommended Mounting Heights and Coverages
NOTE: This chart is provided as a guideline. Actual conditions may dictate variation for this data.
Figure 3.1 • Mounting Height Dimensions (see Chart 3.1 for measurements)
Dim. A
Dim. B
Dim. C
Dim. A
Note: Dimensions A, B & C are based upon heaters hung at the factory recommended mounting height.
Factory recommended mounting heights are listed as a guideline. If infrared heaters are mounted too
low or too high, they may result in discomfort or lack of heat. Brant Radiant Heating, Ltd. generally
recommends observing the recommended mounting heights to optimize comfort conditions. However,
certain applications such as spot heating, freeze protection, outdoor patio heating or very high ceilings
may result in the heaters being mounted outside of the factory recommended mounting heights.
Model BTU Range Recommended Mounting Height (ft.) Coverage Area Straight Config. (LxW) Coverage Area U-Tube Config. (LxW) Distance Between Heaters (ft.) Dimension A Distance Between Heater Rows (ft.) Dimension B Maximum Distance Between Heaters and Wall (ft.) Dimension C
20 ft. 65 MBH 10’ - 16’ 20’ x 12’ 12’ x 12’ 10’ - 20’ 20’ - 40’ 16’
75 MBH 12’ - 20’ 22’ x 15’ N/A 20’ - 30’ 30’ - 50’ 18’
30 ft. 50-65 MBH 10’ - 16’ 30’ x 14’ 17’ x 13’ 10’ - 20’ 20’ - 40’ 17’
75-125 MBH 12’ - 20’ 33’ x 18’ 18’ x 15’ 20’ - 30’ 30’ - 50’ 20’
40 ft. 50-65 MBH 10’ - 16’ 40’ x 16’ 22’ x 14’ 10’ - 20’ 20’ - 40’ 20’
75-125 MBH 12’ - 20’ 44’ x 21’ 23’ x 17’ 20’ - 30’ 30’ - 50’ 20’
150-175 MBH 16’ - 30’ 45’ x 26’ 24’ x 20’ 30’ - 40’ 40’ - 60’ 25’
50 ft. 100-125 MBH 15’ - 25’ 55’ x 24’ 28’ x 19’ 20’ - 30’ 30’ - 50’ 25’
150-200 MBH 16’ - 30’ 56’ x 30’ 29’ x 23’ 30’ - 40’ 40’ - 60’ 25’
60 ft. 125 MBH 16’ - 25’ 66’ x 27’ 33’ x 21’ 20’ - 30’ 30’ - 50’ 25’
150-200 MBH 17’ - 40’ 67’ x 34’ 34’ x 26’ 30’ - 40’ 40’ - 60’ 25’
70 ft. 175-200 MBH 17’ - 40’ 78’ x 38’ 39’ x 29’ 30’ - 40’ 40’ - 60’ 30’
80 ft. 200 MBH 18’ - 45’ 89’ x 42’ 44’ x 32’ 30’ - 40’ 40’ - 60’ 30’

12
DX3 Series
3.0 Installation • Hanger Placement and Suspension
WARNING
!
Suspension of the heater must conform to applicable codes referenced in the Safety section and
these instructions.
1
Lay all radiant tubing out in the following order. Position tubes in approximate location (see figure 3.2).
• 10 ft. primary combustion chamber.
• Radiant emitter tubes.
Important! 150,000-200,000 BTU/h models must use the 10 ft. titanium alloy treated
combustion chamber as the first tube downstream of the burner control box. The combustion
chamber has a yellow identification label located on the swaged end of the tube (remove label
prior to starting up heater).
2
Mark locations for hanging points.
NOTE: If the available hanging points do not allow for the recommended spacing then additional
hangers (P/N: TP-19B) may be necessary.
• The spacing between the burner control box mounting brackets and the first hanger should be
approximately 2’-4”(0.7 m).
• The space between the first two hangers placed on the first tube, should be approximately
8’-10”(2 m).
• The space between hangers thereafter, one per tube, should be approximately 9’-8”(2.94 m).
Hanger Placement and Suspension
Improper suspension of the tube heater may result in collapse and being crushed. Always
suspend from a permanent part of the building structure that can evenly support the total
force and weight of the heater.
Failure to maintain minimum clearance to combustibles may result in fire and/or explosion,
property damage, serious injury or death. Always maintain minimum clearances and post
Clearance Safety Limit signs (P/N: BR-SIGN) where needed.

13
DX3 Series 3.0 Installation • Hanger Placement and Suspension
16 in. Burner Tube
Chart 3.2 • Heater Mounting Requirements and Weights
Figure 3.2 • Heater Mounting Layout
10 ft. Primary Combustion Chamber
NOTE: Type varies depending on
model. Models 150-200 MBH utilize
titanium as the first 10’ tube.
Radiant Emitter Tube(s)
71.12 cm
269.24 cm
294.64 cm 294.64 cm
Burner Control Box
Radiant Emitter
Tube(s)
Suspension
Point
Burner Control Box
Suspension Points
Suspension
Point
Suspension Point
NOTE: A yellow band identifying the
combustion chamber(s) is located in the
middle of the tube(models 150-200 MBH).
Remove paper band before starting up
heater.
Stainless Steel Tube Clamp
(175-200 MBH models only)
Refer to page 18 for U-bend configuration dimensions.
Model requires TF1B accessory package when installing in a U-shaped configuration.
Model Dimension Straight Configuration Suspension Points Control Box Stabilizer Shipping Weight Chain Set Qty. Straight Configuration (P/N: THCS) Chain Set Qty. w/U-bend (TF1B) Configuration Optional Brass Knuckle (P/N:BK)
DX3-20 21’-9” / 261” 3 2 120 lbs. 5 6 3
DX3-30 31’-5” / 377” 4 2 160 lbs. 6 8 4
DX3-40 41’-1” / 493” 5 2 190 lbs. 7 8 5
DX3-50 50’-9” / 609” 6 2 235 lbs. 8 10 6
DX3-60 60’-5” / 725” 7 2 265 lbs. 9 10 7
DX3-70 70’-1” / 841” 8 2 300 lbs. 10 12 8
DX3-80 79’-9” / 957” 9 2 330 lbs. 11 12 9

14
DX3 Series
S-Hook and
#1 Double-Loop Chain
3
Prepare mounting surface, if necessary weld blocks, drill holes (see figure 3.3).
NOTE: The burner control box and radiant tubes should be in straight alignment and level.
4
Fasten beam clamp, screw hook or other type of suspension anchor to hanging point.
5 Attach and close S-Hook (P/N: S-HOOK) and #1 double-loop chain (P/N: THCS) to anchor. Check
that it is securely attached. NOTE: Threaded rod and turnbuckles may be used.
6
Attach hangers to chains. Adjust chain lengths until radiant tubing is level and equal weight distribution
is achieved. Chains must be straight up and down. Do not install chains at an angle as this can result
in tube warpage or separation.
Figure 3.3 • Mounting the Hangers
Wood Beam
Concrete Beam
Beam Clamp
Screw Hook
Screw Hook
with Locknut
and Washer
Threaded Rod
and Turnbuckle
Threaded Rod
Chain
I-Beam
Beam Clamp
Chain Chain
I-Beam
3.0 Installation • Hanger Placement and Suspension
3
4
6
5
3
4
5
6
3
4
6
3
4
6

15
DX3 Series
For 45 degree hanging angle use two
S-hooks and two #1 double-loop chains. For variety of hanging angles, use the Brass Knuckle (P/N: BK) fitting with a #1 double-loop
chain and S-hook.
45°
30° 15°
U-Tubes can be mounted at a
15, 30 or 45 degree angle with two
suspension points, using two Brass Knuckles
(P/N: BK) fittings, #1 double-loop chains and
S-hooks.
U-Tubes can be mounted from a single suspension point
using a Single Mounting Bracket (P/N: SMB) with five
S-hooks and #1 double-loop chains.
Figure 3.4 • U-Tube Hanger Mounting Options
Figure 3.5 • Angled Hanger Mounting Options
Exhaust
End
Single Mounting Bracket
Brass Knuckles
3.0 Installation • Hanger Placement and Suspension

16
DX3 Series
Radiant Tube Assembly
To install the radiant tubes:
1 Place tubes in hangers with the welded seam facing downward and the swaged end of the tube
towards the exhaust end of the heater system (see figure 3.6).
Refer to page 23 for tube installation sequence. Place the combustion chamber as the first tube
connected to the burner control box. Models 150-200 MBH utilize a titanium combustion chamber with
yellow identification tag.
Figure 3.7 • Attach Tube Clamps
Hanger
Welded Seam
Faces Down
Swaged End
Tube Clamp
Radiant Tube
IMPORTANT! 175,000 to 200,000 BTU/h models must be installed
with a stainless steel tube clamp (P/N: TP-220) located at the seam
between the primary combustion chamber and the second tube
section downstream of the burner control box.
NOTE: If the tube clamp comes
apart, the spacer must be
re-assembled with the spacer’s
concave surface facing against
the radiant tube surface.
Concave surface
3.0 Installation • Radiant Tube Assembly
Slide tube clamps onto radiant tubes (see figure 3.7)
2
Figure 3.6 • Attach Hangers

17
DX3 Series
Optional Elbow or U-Bend Accessory Configuration
A 90 degree elbow or 180 degree U-bend accessory fitting may be installed in the radiant tube heating
system. Refer to Chart 3.3 on page 18 for minimum distance requirements from the burner control box.
When installing an Elbow or U-Bend Accessory Fitting:
• The top clearance of an uncovered (no reflector) elbow or U-bend accessory fitting to
combustibles is 18 in.
• If operating the heater unvented, separate the intake air to the heater from its exhaust products a
minimum of 4 ft., further separation may be necessary. Combustion air may also be supplied.
• A maximum of two 90° elbows or one 180° U-bend can be installed on a heater.
• Remove one 36 in. section of baffle. Refer to baffle assembly section on page 22.
3 Slip-fit the radiant tube sections together until tightly connected (install the swaged end of each tube
towards exhaust end). NOTE: If it is difficult to mate the tubes, they may be installed incorrectly.
4 Center tube clamps over the seam where two radiant tube sections connect. If necessary, rotate tube
clamps so they will not interfere with the reflector end caps during expansion and contraction of
the heater.
5 Tighten tube clamp bolts to secure. When proper compression is obtained (40-60 ft-lbs. torque) the
tube seam will create a visible mark on the tube clamp. NOTE: Excessive torque may damage the
tube clamp.
6 Determine the location of the burner control box and note the placement of the mounting chains.
Figure 3.8 • Tube Connections
Tubes fit snuggly together and the
tube clamp is centered over the seam.
Tubes are not fit snuggly
together and the tube clamp is
not centered over the seam.
The tube clamp is tight when the
torque is achieved (normally
when seam becomes visible).
Correct Tube Connection Incorrect Tube Connection
90 Degree Elbow Bend 180 Degree
U-Bend
(P/N: TF1B)
(P/N: E6)
3.0 Installation • Optional Elbow or U-Bend Accessory Configuration
Figure 3.9 • Optional Tube Connections

NOTE: Maintain a 36” minimum
distance from vent to combustion air
intake on heaters fitted with a U-bend
accessory fitting.
18
DX3 Series
Chart 3.3
Minimum Distance From Burner
Control Box to Elbow or U-bend
Accessory Fitting
65 - 100 10 ft.
125 15 ft.
150 - 175 20 ft.
200 25 ft.
Models (MBH) Dimension A
16”
16”
6”
20”
10” 20”
Tube Clamp Tube Clamp
12.5”
12.5”
* 5EA-SUB may only be ordered at the time of heater production.
Field corrections require two (2) TR-60 packages.
Figure 3.10 • Elbow and U-Bend Clearances
Dimension A
U-Bend can be set in both directions
12”
Figure 3.11 • U-Bend and Elbow Dimensions
Chart 3.4
Overall Dimensions for Heaters Configured
With U-Bend (P/N: TF1B)
Model Dimension B Notes
DX3-20 13’ - 1” / 157” N/A
DX3-30 17’ - 9” / 213” Requires P/N: 5EA-SUB
DX3-40 22’ - 9” / 273” N/A
DX3-50 27’ - 5” / 329” Requires P/N 5EA-SUB
DX3-60 32’ - 5” / 389” N/A
DX3-70 37’ - 3” / 447” Requires P/N 5EA-SUB
DX3-80 42’ - 1” / 505” N/A
3.0 Installation • Optional Elbow or U-Bend Accessory Configuration
Elbow can be set
in both directions
Tube Clamp Tube Clamp
Dimension A
Dimension B
P/N: TF1B P/N: E6
8”

19
DX3 Series
12.875” 16”
32.5”
4.5”
9.35”
8.625”
18.5” 4”
11.25”
16”
3.0 Installation • Burner Control Box Suspension
Burner Control Box Suspension
Suspending the burner control box must be done in accordance with applicable codes listed in the Safety
section and these instructions.
The burner control box must be in straight alignment with all radiant tubes and level. Contact your local
distributor or the factory to see if your application allows for the rotation of the burner control box.
1 Determine the mounting chain locations for hanging the burner control box.
2 Fasten beam clamp, screw hook or other type of suspension anchor to hanging point.
3 Attach S-hook and chain assembly (P/N: THCS) to anchor. Check that it is securely connected.
4
Attach chain assemblies and S-hooks to mounting brackets on the burner control box. Adjust chain lengths
until level and in straight alignment with radiant tubes. Burner sight glass will be visible from the floor.
Figure 3.12 • Burner Control Box Assembly • Side View
Burner Sight Glass
Burner Control Box tube is in
straight alignment with 10’
Primary Combustion Chamber
Figure 3.13 • Burner Control Box with U-Bend • End View
1
2
3
4
NOTE: Control Box Cover should allow for
clearance for easy service and maintance.

20
DX3 Series
Reflector Assembly
3.0 Installation • Reflector Assembly
To install the reflectors (see figure 3.14):
1 Attach the reflector center supports onto radiant tubes.
2 Slide each reflector section through the hangers and adjust the reflector tension spring into the
V-groove on the top of the reflector. The reflectors should overlap approximately 4 inches.
3 To prevent the reflectors from shifting, secure the reflector sections together using sheet metal screws,
except at the expansion joint (see page 23). NOTE: Installer to supply sheet metal screws.
4 Attach reflector end caps with polished finish inward, to each end of the reflector run. Secure with clips.
Reflectors, and reflector accessories, direct infrared energy to the floor level. The reflector assembly
depends on the heater configuration, proximity to combustibles and space surrounding the heater.
Before you begin assembly, determine if the use of reflector accessories are necessary (see Chart 3.5).
Figure 3.14 • Reflector Assembly
Reflector
4” Overlap
Reflector Center Support
(mid-point of tube)
Radiant
Tube
Hanger
and Chain
Reflector End Cap
Reflector Tension
Spring
Clips
13.75”
Figure 3.15 • Width of Installed Reflector - Top View
SERVICE ACCESS PANEL
CONTROLS & GAS VALVE COMPARTMENT
1. Disconnect gas & electricity.
2. Remove four (4) thumbscrews.
3. Remove top cover.
4. Swing hinged panel downward.
 R  . R R SR .
SERVICE ACCESS PANEL
IGNITER & FLAME SENSE COMPARTMENT
1. Disconnect gas & electricity.
2. Remove cover by lifting top
cover upward and outward.
CAUTION: HOT SURFACE.
 R  . R R SR .
SERVICE ACCESS PANEL
FAN COMPARTMENT
1. Disconnect gas & electricity.
2. Remove top cover ( thumbscrews).
3. Remove tsi () 4 screws.
4. ift and remove panel.
 R  . R R SR .
4
se two wrenches when disconnecting or installing
as ipe
urner o
Side iew
urner o
Rear iew
ype  Rubber ose