Installation, operation, maintenance and parts manual [PDF] (40 pages)
- Updated: 16.04.2026
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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.
Keep these instructions for future reference.
Please read and save these instructions. This heater must be installed and serviced by trained gas installation and service
personnel only! Read carefully before attempting to assemble, install, operate or maintain the product described. Protect
yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury
and/or property damage! Retain these instructions for future reference.
Form 5S6496
Printed in U.S.A.
03460
1109/224/VCPVP
Dayton Tube Heaters
®
Description
Dayton tube heaters are gas-fired infrared heaters designed to provide comfort heat.
They consist of three (3) main components: a burner control box, radiant tube, and
reflector assembly. The heaters are typically suspended from the ceiling by chains
and controlled by a thermostat. They can be installed either vented or unvented,
and may use outside air for combustion if necessary. The radiant tube may be
installed in different configurations depending on the heating requirements.
These heaters use infrared energy to heat spaces. When heat is required, the
burner control box ignites a gas/air mixture and pushes the hot gases into the
radiant tube. As the gases pass through the assembly, the tubing is heated
and emits infrared, which is then directed toward the floor by reflectors. This is
known as primary infrared and is absorbed by the floor, objects and people in
the space, raising their temperatures. They in turn re-radiate this heat, known
as secondary infrared, to create a comfort zone at the floor level. This is how
Dayton tube heaters can heat large spaces without having to provide primary
infrared for every square foot of area. However, if the goal is to spot heat a
small area within a large space, only the primary infrared makes this possible.
Dayton tube heaters are design certified for use in industrial and commercial
buildings, such as warehouses, manufacturing plants, aircraft hangars and
vehicle maintenance shops. They are not certified for residential use or where
flammable gases or vapors are generally present, such as spray booths.
• 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.
For Your Safety - If you smell gas:
WARNING
!
!
Improper installation,
adjustment,
alteration, service or
maintenance can
cause property
damage, injury or death. Read and
understand the installation,
operating 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 and/
or property damage.
WARNING
!
!
7D837A thru 7D849A, 7D851A,
7AR79 thru 7AR88
Installation, Operation, Maintenance and Parts Manual
Dayton Installation, Operation, Maintenance and Parts Manual
Dayton Tube Heaters
®
7D837A thru 7D849A, 7D851A, 7AR79 thru 7AR88
TABLE OF CONTENTS
INTRODUCTION.................................................................................................................................................................... 3
Overview......................................................................................................................................................................... 3
SAFETY ............................................................................................................................................................................... 4
Warning Symbols............................................................................................................................................................. 4
Specific Applications........................................................................................................................................................ 4
Standards, Certifications and Governmental Regulations ................................................................................................. 5
Clearance to Combustibles ............................................................................................................................................. 6
INSTALLATION ...................................................................................................................................................................... 8
Design Considerations and Prechecks............................................................................................................................... 8
Recommended Mounting Heights....................................................................................................................................10
Hanger Placement and Suspension...................................................................................................................................11
Optional U-Bend or Elbow Accessory Configuration.........................................................................................................14
Radiant Tube Assembly....................................................................................................................................................15
Burner Control Box Suspension .......................................................................................................................................18
Reflector Assembly...........................................................................................................................................................19
Baffle Assembly and Placement........................................................................................................................................21
Final Heater Assembly......................................................................................................................................................22
Venting............................................................................................................................................................................23
Combustion Air Requirements.........................................................................................................................................28
Gas Supply ......................................................................................................................................................................30
Electrical Requirements....................................................................................................................................................33
OPERATION...........................................................................................................................................................................35
MAINTENANCE ....................................................................................................................................................................36
Troubleshooting Guide.....................................................................................................................................................37
PARTS
...............................................................................................................................................................................38
Repair Parts Illustration.....................................................................................................................................................38
Repair Parts List................................................................................................................................................................39
LIMITED WARRANTY ...........................................................................................................................................................40
2
Prior to installation, verify that you have received all heater components included with your tube heater. Refer to the chart
below for a list of the kit contents for your model heater. Materials not included in the kit (e.g. sheet metal screws, vent
material, terminals, etc.) are the responsibility of the installer.
Kit Contents
Filled By:
5VD67A-
5VD70A
5VD71A-
5VD72A
5VD73A-
5VD78A
5EAJ0-J2,
5EAH3-H5
5VD79A-80A,
5EAH6-H8
Part #
Description
20 ft.
30 ft.
40ft.
50ft.
60ft.
TP-19B
4” Tube Hanger with Tension Spring
3
4
5
6
7
TP-21B
4” Tube Clamp
2
3
4
5
6
TP-33B
1/2” Shut-off Ball Valve/Inlet Tap
1
1
1
1
1
TP-82
4” Reflector Center Support
2
3
4
5
6
TP-83
24” Stainless Steel 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
THCS
Tube Heater Chain Sets
5
6
7
8
9
IOM
Installation, Operation & Maintenance Manual
1
1
1
1
1
Dayton Installation, Operation, Maintenance and Parts Manual
Models 7D837A thru 7D849A, 7D851A, 7AR79 thru 7AR88
3
INTRODUCTION
Overview
The intent of this manual is to provide information regarding general safety, installation, operation and maintenance of
this tube heater. You must read and understand all instructions and safety warnings before installing or servicing the tube
heater.
Available Models - Tube Heater Burner Box and Tube Reflector Combinations
Combo #
Burner
Box #
Tube &
Reflector Pkg #
Tube Type
Length
BTU/H
Gas Type
7D837A
5VD67A
5VD88
20-4”-ALUM
20
50,000
NAT
7D838A
5VD68A
5VD88
20-4”-ALUM
20
50,000
LP
7D839A
5VD69A
5VD88
20-4”-ALUM
20
75,000
NAT
7D840A
5VD70A
5VD88
20-4”-ALUM
20
75,000
LP
7D841A
5VD71A
5VD89
30-4”-ALUM
30
100,000
NAT
7D842A
5VD72A
5VD89
30-4”-ALUM
30
100,000
LP
7D843A
5VD73A
5VD91
40-4”-ALUM
40
100,000
NAT
7D844A
5VD74A
5VD91
40-4”-ALUM
40
100,000
LP
7D845A
5VD75A
5VD91
40-4”-ALUM
40
125,000
NAT
7D846A
5VD76A
5VD91
40-4”-ALUM
40
125,000
LP
7D847A
5VD77A
5VD90
40-4”-TITAN
40
150,000
NAT
7D848A
5VD78A
5VD90
40-4”-TITAN
40
150,000
LP
7AR80
5EAJ0
5VD90 & 5EAH2
40-4”-TITAN & 10-4”-ALUM
50
150,000
NAT
7AR79
5EAJ1
5VD90 & 5EAH2
40-4”-TITAN & 10-4”-ALUM
50
150,000
LP
7AR83
5EAJ2
5VD90 & 5EAH2
40-4”-TITAN & 10-4”-ALUM
50
175,000
NAT
7AR81
5EAH3
5VD90 & 5EAH2
40-4”-TITAN & 10-4”-ALUM
50
175,000
LP
7AR87
5EAH4
5VD90 & 5EAH2
40-4”-TITAN & 10-4”-ALUM
50
200,000
NAT
7AR85
5EAH5
5VD90 & 5EAH2
40-4”-TITAN & 10-4”-ALUM
50
200,000
LP
7D849A
5VD79A
5VD90 & 5VD88
40-4”-TITAN & 20-4”-ALUM
60
150,000
NAT
7D851A
5VD80A
5VD90 & 5VD88
40-4”-TITAN & 20-4”-ALUM
60
150,000
LP
7AR84
5EAH6
5VD90 & 5VD88
40-4”-TITAN & 20-4”-ALUM
60
175,000
NAT
7AR82
5EAH7
5VD90 & 5VD88
40-4”-TITAN & 20-4”-ALUM
60
175,000
LP
7AR88
5EAH8
5VD90 & 5VD88
40-4”-TITAN & 20-4”-ALUM
60
200,000
NAT
7AR86
5EAH9
5VD90 & 5VD88
40-4”-TITAN & 20-4”-ALUM
60
200,000
LP
NOTICE
WARNING
!
!
CAUTION
WARNING
!
!
!
WARNING
!
!
Dayton Installation, Operation, Maintenance and Parts Manual
Dayton Tube Heaters
®
7D837A thru 7D849A, 7D851A, 7AR79 thru 7AR88
Safety 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.
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.
4
Applications
This is not an explosion-proof heater.
No heater may be used in a Class 1
or Class 2 Explosive Environment.
Consult the local Fire Marshall, fire
insurance carrier and other authorities
for approval if the proposed installation
is in question.
Do not use this heater
in the home, sleeping
quarters, attached
garages, etc.
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.
Not for residential use!
Commercial and Industrial
This tube heater is designed
and certified for use in industrial
and commercial buildings such
as, warehouses, manufacturing
plants, aircraft hangars and vehicle
maintenance shops.
SAFETY
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