Detroit Radiant Products HLV Series User manual

Printed in U.S.A.
©2006 Detroit Radiant Products Co.
Form# LIOHLV-2M-8/06 (ID)
(Replaces LIOHLV-1M-2/05)
Vacuum type tube heaters are negative pressure gas-
fired infrared heaters designed to provide comfort
heat. They consist of four (4) main components: a
burner control box, radiant tube, reflector assembly,
and vacuum exhauster. 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 the vacuum pulls 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 reradiate this heat, known
as secondary infrared, to create a comfort zone at the
floor level. This is how 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. Vacuum tube
heaters are design certified for use in industrial and
commercial buildings, such as warehouses,
manufacturing plants, aircraft hangars and vehicle
maintenance shops. No heater may be used in a
class 1 or class 2 explosive environment. Unless
otherwise indicated, they are not certified for
residential use or where flammable gases or vapors
are generally present, such as spray booths.
HLV Series
Tube Heater
Vacuum System
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.
FOR YOUR SAFETY
What to do if you smell gas:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from
a neighbor’s phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier,
call the fire department.
Do not store or use gasoline or
other flammable vapors and liquids
in the vicinity of this or any other
appliances.
WARNING
Improper installation, adjustment,
alteration, service or maintenance
can cause property damage, injury
or death. Read the installation,
operating and maintenance
instructions thoroughly before installing or
servicing this equipment. Protect yourself and
others by observing all safety information.
!WARNING
This heater must be installed and serviced by trained gas installation and service personnel only!
Retain these instructions for future reference.
!
Tube Heater Vacuum System Installation, Operation, Maintenance and Parts General Manual
Additional literature on this and other products is available at www.reverberray.com.
WARNING
!

Tube Heater Vacuum System Installation, Operation, Maintenance and Parts Manual
Tube Heater Vacuum System
2
WARNINGS
Maintain published Clearance to Combustibles at all times. Refer to page 5 for Clearance to Combustibles
guidelines.
This infrared heater is designed for use in industrial and commercial buildings such as warehouses,
manufacturing plants, aircraft hangars, service garages, etc.
Detroit Radiant Products Company cannot anticipate every use which may be made of their heaters. Check
with your local fire safety authority if you have questions about local regulations.
This heater must be installed and serviced by
trained gas installation and service personnel
only. Read and understand these instructions
thoroughly before attempting to install, operate or
service this heater. Failure to comply could result
in personal injury, asphyxiation, death, fire, and/
or property damage. Retain these instructions for
future reference.
Commonwealth of Massachusetts
All heaters installed in the Commonwealth of
Massachusetts must be installed by a licensed
plumber or gas fitter.
This is not an explosion-proof
heater. Where there is the
possibility of exposure to
flammable vapors, consult the
local fire marshal, the fire insurance carrier and
other authorities for approval of the proposed
installation.
!WARNING !WARNING
!WARNING
!WARNING
Not For Residential Use!
Do not use in the home, sleeping
quarters, attached garages, etc.
Do not operate heater with any part bypassed,
with any part failed or in any scenario that may
compromise safety.

3
1. SAFETY INFORMATION .............................................................................................. 4
2. DESIGN ........................................................................................................................ 6
2.1 Pre-Design................................................................................................... 6
2.2 Design for Non-Condensing System ........................................................... 7
2.3 Design for Condensing Systems ................................................................. 8
2.4 Definitions .................................................................................................... 10
2.5 Vacuum Pump Application ........................................................................... 11
2.6 Damper Application ..................................................................................... 12
3. INSTALLATION ............................................................................................................. 13
3.1 Pre-Installation............................................................................................. 13
3.2 Vacuum Pump Assembly & Mounting.......................................................... 15
3.3 Tube & Burner Box Mounting ...................................................................... 15
3.4 Baffle Assembly ........................................................................................... 17
3.5 Reflector Assembly ...................................................................................... 18
3.6 Reflector Accessories .................................................................................. 19
3.7 Flue Venting for Non-Condensing Systems ................................................ 20
3.8 Flue Venting for Condensing Systems ........................................................ 21
3.9 Combustion Air Intake ................................................................................. 22
3.10 Gas Supply .................................................................................................. 23
4. OPERATION ................................................................................................................. 25
4.1 Electrical Requirements............................................................................... 25
4.2 Lighting Instructions .................................................................................... 25
4.3 Shutdown Instructions ................................................................................. 25
4.4 Theory of Operation .................................................................................... 25
4.5 System Start-Up & Damper Setting ............................................................. 29
5. MAINTENANCE ............................................................................................................ 30
5.1 Troubleshooting Chart ................................................................................. 31
5.2 Troubleshooting Flowchart .......................................................................... 32
5.3 HLV Parts List .............................................................................................. 34
6. LIMITED WARRANTY .................................................................................................. 36
Tube Heater Vacuum System Installation, Operation, Maintenance and Parts Manual
Table of Contents and Certifications
Approval Standards and Certifications
Detroit Radiant Products Units comply with or are certified by one or more of the following organizations or standards:
•CSA International (CSA)
•American National Standards (ANSI Z83.6 and Z83.20)
• Occupational Safety and Health Act (OSHA)
• National Standards of Canada
IMPORTANT!
Any alteration of the system or of the factory-authorized components specified in this manual or by Detroit
Radiant Products Company voids all certification and warranties.

The following must be reviewed before installing this heater.
4
Tube Heater Vacuum System Installation, Operation, Maintenance and Parts Manual
Tube Heater Vacuum System
The installation of this heater must conform with
local building codes or, in the absence of local
codes, with the National Fuel Gas Code, ANSI
Z223.1 (NFPA 54) (latest edition). Applications in
Canada must conform to CAN/CGA B149.1 and .2
codes and Canadian Electrical Code C22.1 (latest
edition).
Under no circumstance is either the gas supply line
or the electrical supply line to the heater to provide in
the suspension of the heater.
The weight of the heater must be entirely suspended
from a permanent part of the building structure
having adequate load characteristics.
Neither the gas supply line, electrical supply line nor
sprinkler heads shall be located within the minimum
clearance to combustibles as shown in the
Clearance-to-Combustibles Chart on page 5.
Check the CSA rating label on the heater to verify
the proper gas to be used. Check the other
labels on the heater to verify proper mounting and
clearance to combustibles.
1. SAFETY INFORMATION
Signs must be posted in storage areas to specify
maximum stacking height allowed in order to
maintain clearance to combustibles. Warning
plaques (P/N: PLQ) are recommended.
PUBLIC GARAGES
The installation of this heater in public garages must
conform with the Standard for Parking Structures,
ANSI/NFPA 88A (latest edition), or the Standard for
Repair Garages, ANSI/NFPA 88B (latest edition), and
must be at least 8 ft. above the floor (see page 5 for
Clearance to Combustibles). Applications in Canada
must conform to the Canadian Electric Code C22.1
(latest edition) when an external electrical source is
used.
AIRCRAFT HANGARS
The installation of this heater in aircraft hangars must
conform with the Standard for Aircraft Hangars,
ANSI/NFPA 409 (latest edition). The heater must be
installed at least 10 ft. above the upper wing
surfaces and engine enclosures of the highest
aircraft which might be stored in the hangar. In
areas adjoining the aircraft storage area, the heaters
must be installed at least 8 ft. above the floor. The
heaters must be located in areas where they will not
be subject to damage by aircraft, cranes, movable
scaffolding or other objects.
ELECTRICAL
The heater, when installed, must be electrically
grounded in accordance with the National Electrical
Code ANSI/NFPA 70 (latest edition).
IMPORTANT NOTE
Unless otherwise indicated on the CSA Rating
Label (Chart 2 (C2) or Chart 3 (C3)), this infra-red
heater is designed to operate on standard BTU
gas (either 1015 BTU ft3for natural gas or 2525
BTU ft3for propane gas) at elevations 0 to 6000
feet MSL (Sea Level).
!CAUTION

5
Clearances listed in the following table apply to
individual burners located in the HLV system.
Inspect each burner rating label to ensure that
clearances are maintained.
Tube Heater Vacuum System Installation, Operation, Maintenance and Parts Manual
Safety Information
Clearances to Combustibles
For the safe installation of this unit, consult the Clearance to Combustibles chart. It contains clearances that
must be maintained.
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.
!WARNING
This heater must be installed so that the minimum
clearance to combustibles, as marked on the
heater, will be maintained from vehicles parked
below. If vehicle lifts are present, ensure that
these clearances will be maintained from the
highest raised vehicle.
!WARNING
Failure to comply with the stated clearances to
combustibles could result in personal injury, death
and/or property damage.
!WARNING
45° MOUNTING ANGLE 0° W/2 SIDE SHIELDS
BEHINDFRONT
0° W/1 SIDE SHIELD
SIDE
TOP
SIDE
BELOW
0° MOUNTING ANGLE
TOP
BELOW
SIDE
TOP
SIDE
BELOW
BEHIND
FRONT
TOP
BELOW
FRONT BEHIND
HLV 50 [N,P]
0º 9 9 4 47
45º 39 8 10 47
w/1 side shield 0º 29 8 4 47
w/2 side shields 0º 9 9 4 47
20 ft from burner 0º 7 7 4 30
HLV 60 - HLV 75 [N,P]
0º 9 9 4 48
45º 39 8 10 48
w/1 side shield 0º 29 8 4 48
w/2 side shields 0º 9 9 4 48
20 ft from burner 0º 7 7 4 30
HLV 80 [N,P]
0º 11 11 4 48
45º 39 8 10 48
w/1 side shield 0º 29 8 4 48
w/2 side shields 0º 16 16 4 48
20 ft from burner 0º 7 7 4 30
HLV 90 [N,P]
0º 12 12 4 54
45º 39 8 10 54
w/1 side shield 0º 29 8 4 54
w/2 side shields 0º 16 16 4 54
20 ft from burner 0º 7 7 4 30
HLV 100 [N,P]
0º 14 14 4 66
45º 39 8 10 66
w/1 side shield 0º 29 8 4 66
w/2 side shields 0º 16 16 4 66
20 ft from burner 0º 7 7 4 30
HLV 110 - 125 [N,P]
0º 18 18 4 72
45º 58 8 10 72
w/1 side shield 0º 42 8 4 72
w/2 side shields 0º 20 20 4 72
20 ft from burner 0º 7 7 4 30
HLV 140 - HLV 150 [N,P]
0º 24 24 6 81
45º 58 8 10 81
w/1 side shield 0º 42 8 6 81
w/2 side shields 0º 30 30 6 81
20 ft from burner 0º 11 11 6 44
HLV 170 - HLV 175 [N,P]
0º 34 34 6 92
45º 63 8 10 92
w/1 side shield 0º 50 8 6 92
w/2 side shields 0º 30 30 6 92
20 ft from burner 0º 11 11 6 44
HLV 180 - HLV 200 [N,P]
0º 41 41 6 94
45º 63 8 10 94
w/1 side shield 0º 54 8 6 94
w/2 side shields 0º 30 30 6 94
20 ft. from burner 0º 11 11 6 44
CLEARANCES TO COMBUSTIBLES (IN.)
MODEL NO.
MOUNTING
ANGLE
SIDE
TOP
BELOW

Tube Heater Vacuum System
1. The HLV can be a Non-condensing system or
a condensing system. After the pre-design
section is read, go to the appropriate section for
the desired system. If it is uncertain what type of
system is to be used, start off by going to the
condensing section (2.3) and if the completed
design does not require condensing pipe, then
by default, the system will be a non-condensing
system.
2. All non-condensing systems must be on a single
temperature zone. If two temperature zones are
required, the system will be a condensing system
thus continue to section 2.3.
3. Determine the heat load required for the building.
4. Mounting height and coverage are the two critical
variables in selecting the proper size burners and
the number of burners for a layout.
a) The mounting height of the system will
determine the largest size burner that can be
used.
b) During the design phase it may be
discovered that the number of burners is not
enough to achieve proper coverage, it may be
necessary to use a larger number of smaller
burners.
5. When determining the location of the system,
keep in mind clearances to combustible
materials, lights, sprinkler heads, overhead
doors, storage areas with stacked materials, gas
and electrical lines, parked vehicles, cranes and
any other possible hazards. Adequate clearance
around air openings and accessibility for service
must be provided. Refer to the Warnings,
Cautions and the Clearances to Combustibles
Chart on the previous page and on the heater to
verify that a safe installation condition exists.
6. Section 2.4 lists the ‘System Design Parameter’
definitions. These definitions will need to be
referenced for system design.
2.1 Pre-Design for Condensing and Non-Condensing Systems
Tube Heater Vacuum Systems Installation, Operation, Maintenance and Parts Manual
Pre-Design
6
Figure 2-1 (E-6)
Figure 2-2 (V-T)
Common Accessory Dimensions
Figure 2-4 (V-D)
Figure 2-3 (V-TI)
12-1/2”
12-1/2”
R6”
1’-9”
4”
11-1/2”
4”
1’-9”
11-1/2”
4”
1’-4”

7
1. The best approach to designing a system is to start
off by actually laying out a design without
concerning oneself with the system design
parameters. In using this approach it is ideal to
place the burners where desired and the vacuum
pump where desired. Referring to the ‘Typical
Layouts’ section of the HLV Design Guide may be
helpful.
2. Now that there is a tentative layout for the system,
make sure that each run in the system meets the
‘calculated minimum run’ criteria. Calculated
minimum run is figured by adding the total ‘single
flow’ plus one-half of the common clow (refer to
section 2.4 for illustrations and definitions). If the
system does not meet the Calculated Minimum
Run, add length to the run to make sure all burners
meet calculated minimum run.
3. Refer to the chart below for “Non-condensing
system design parameters” and check the
‘calculated maximum run’ for every burner. It will
be necessary to make the system a condensing
system or shorten a run if the calculated maximum
run is exceeded. Refer to section 2.4 for examples
to determine ‘calculated maximum run’.
4. Check to make sure the following applies for non-
condensing systems only.
a) A maximum of two elbows per run is allowed in
a system.
b) A maximum of three intersections (tees or
crosses) are allowed in a system (per vacuum
pump).
c) A reflector over an elbow or intersection is
required if 20 feet or less from the burner.
The system tube lengths are determined by the gas input (BTU/H). The chart below indicates the system
design parameters for each burner model used in a system. Elbows and tees have already been accounted
for, therefore do not add them when calculating tube lengths.
Designing a non-condensing system can be quite simple if the following four steps are read carefully. Along
with these four steps, an understanding of the design definitions is critical. Refer to section 2.4 for definitions
and illustrations.
2.2 Design for Non-Condensing Systems
Tube Heater Vacuum System Installation, Operation, Maintenance and Parts Manual
Design
Non-Condensing Systems
HLV Burner Model
Minimum Distance from
Burner to first Elbow or
Intersection (ft.)
Calculated Minimum Run (ft.)
Calculated Maximum Run
(Distance of Actual Radiant
Pipe) (ft.)
50, 60 10 30 45
75, 80 10 35 50
90, 100 10 40 55
110, 125 10 45 60
140, 150 15 50 65
170, 175, 180 15 55 70
200 20 60 75
Design Parameters for Non-Condensing Systems
(Refer to Section 2.4 For Chart Definitions)

3) Determine the calculated starting point of the
condensing run. Look up each burner size on the
chart to determine at what point in the ‘calculated
run’ where condensing pipe must begin. Once the
condensing pipe begins in a run, all intersections
and elbows thereafter must be condensing pipe as
well. Do this for each individual run. If none of the
runs are long enough to use condensing pipe then
the system is regarded as a ‘non-condensing’
system.
3a) Alternate approach to step 3 if simulating an
in-line design.
If doing an in-line system, the tie-in burners must
be at the minimum distance to elbow (no more, no
less). Reference the Maximum Actual Distance
between Tie-Ins to make sure the tie-in distance is
not exceeded. Reference the Starting Point of
Condensing for ‘Similated In-Line’ systems and
determine when the condensing pipe starts after
the last tie-in. When using this approach, step 4
does not apply.
8
1) The best approach to designing a system is to start
off by actually laying out a design with out
concerning oneself with the system design
parameters. In unsing this approach it is ideal to
place the burners where desired and the vacuum
pump where desired. Referring to the Typical
Layouts section 3.2 may be helpful.
2) Now that there is a tentative layout for the system,
make sure that each run in the system meets the
‘Calculated Minimum Run’ criteria. Calculated
minimum run is figured by adding the total ‘Single
Flow’ plus one-half of the Common Flow (refer to
section 2.4 for illustrations and definitions). If the
system does not meet the calculated minimum
run, add length to the run to make sure all burners
meet calculated minimum run.
The system tube lengths are determined by the gas input (BTU/H). The chart below indicates the system
design parameter for each burner model used in a system. Elbows and tees have already been accounted for,
therefore do not add them when calculating tube lengths.
Designing a condensing system can be quite simple if the following six steps are read carefully. Along with
these six steps, an understanding of the design definitions is critical. Refer to section 3.6 for definitions and
illustrations.
Tube Heater Vacuum System
Tube Heater Vacuum Systems Installation, Operation, Maintenance and Parts Manual
Condensing Systems
2.3 Design for Condensing Systems
HLV Burner
Model
Minimum Distance
from Burner to first
Elbow or
Intersection (feet)
Calculated
Minimum Run
(feet)
Calculated Starting
Point of
Condensing Run
(feet)
Calculated
Maximum Run
(Including
Condensing Pipe)
(feet)
Maximum Actual
Distance between
Tie-Ins for
'Simulated In-Line'
systems (feet)
Starting Point of
Condensing for
'Simulated In-Line'
systems
50, 60 10 30 45 85 35 30 ft After Last Tie-in
75, 80 10 35 50 95 40 30 ft After Last Tie-in
90, 100 10 40 55 105 45 30 ft After Last Tie-in
110, 125 10 45 60 110 50 40 ft After Last Tie-in
140, 150 15 50 65 120 55 40 ft After Last Tie-in
170, 175, 180 15 55 70 130 55 40 ft After Last Tie-in
200 20 60 75 140 55 40 ft After Last Tie-in
Design Parameters for Condensing Systems
(Refer to Section 2.4 For Chart Definitions)
Simulated in-line Systems

T
T
Figure 2-5
9
Condensing
Pipe
Points where zone 1 & 2 share
common tubing. Condensing
pipe must begin here.
Zone 1
Zone 2
4) Check the calculated maximum run for every
burner. It is usually recommended to shorten a run
if the calculated maximum run is exceeded. Refer
to section 2.4 for examples to determine ‘calculated
maximum run’.
5) If two different temperature zones are going to be
used on a system, where some burners will be on
one thermostat and the remainder of the burners
will be on a second thermostat, the following
guidelines must be met.
a) At the point where the two different zones will
have burners that share common tubing,
condensing pipe must be used. The condensing
pipe will start at this point and continue through to
the pump. See figure 2-5 for an example.
6) Check to make sure the following applies for
condensing systems only. If these items are
exceeded, contact the factory for approval.
a) A maximum of three elbows per run is allowed
in a system.
b) A maximum of six intersections (tees or crosses)
are allowed in a system (per vacuum pump).
c) A reflector over an elbow or intersection is
required if 20 feet or less from the burner.
Tube Heater Vacuum System Installation, Operation, Maintenance and Parts Manual
Design
Condensing Systems

10
Calculated Maximum Run –The longest allowable
‘calculated run’ from the burner to the exhauster
including the condensing pipe.
Calculated Minimum Run – The minimum allowable
‘calculated run’.
Calculated Run – Calculated run is determined by
adding the total ‘single flow’ plus one half of the
‘common flow’ of Pipe. For Example, if an actual run,
has 30 feet of ‘single flow’ and 20 feet of ‘common
flow’, this equals 40 feet (30 ft. + one half of 20 ft.) of
Calculated Run. Refer to figure 2-6.
Calculated Starting Point of Condensing Run – The
point in the ‘calculated run’ where condensing pipe must
begin. Refer to figure 2-7 for an example.
Common Flow – The radiant pipe in a run between
the first intersection (tee or cross) and the exhauster.
‘Common Flow’ begins at the point where two (2) or
more burners share a common exchanger. Refer to
figure 2-6.
Minimum Distance to Elbow or Intersection – The
minimum allowable distance from the burner box to
the first elbow or intersection.
Run – The total actual length of radiant pipe from the
individual burner box to the exhauster.
Single Flow – The radiant pipe in a run from the burner
box to the first intersection (tee or cross). Refer to
figure 2-6.
Figure 2-6 Figure 2-7
In figure 2-7, a model HLV-75 starts it’s condensing
pipe at 50 calculated feet (40 feet plus one-half of 20
feet). The amount of condensing pipe in this particular
example is 20 ft.
In figure 2-6, the actual run has 30 feet of single flow
and 20 feet of common flow, this equals 40 feet (30
ft. + one half of 20 ft.) of calculated run.
Tube Heater Vacuum System
Tube Heater Vacuum Systems Installation, Operation, Maintenance and Parts Manual
Definitions
2.4 Definitions
!Please read this important definition carefully!
ISOLATION BOOT VACUUM PUMP
PRIMARY DAMPER
HLV-75HLV-75
20 FT
30 FT
30 FT
40 FT 40 FT
HLV-75HLV-75
40 FT
20 FT
20 FT
VACUUM PUMP
START POINT OF
CONDENSING

11
The following table indicates which vacuum pump
should be used for a system based on the specific BTU/
H input.
*NC-7 IS FOR NON-CONDENSING SYSTEMS ONLY.
A system containing a HLV-150 burner and two HLV-
100 burners would have a total system input of 350,000
BTU/H. Therefore, this system requires a PB-9 vacuum
pump as indicated in the table.
The vacuum pump exhaust venting length must be
between 2 feet and 25 feet. The maximum number of
elbows in the exhaust vent is two (2).
Isolation boots provided with the system must be
installed before the vacuum pump on all systems.
Figure 2-8 (PB Series) Figure 2-9 (NC-7 Series)
Vacuum Pump Mounting Details
Tube Heater Vacuum System Installation, Operation, Maintenance and Parts Manual
Design
Vacuum Pump
2.5 Vacuum Pump Application
Use appropriate hardware to
attach to structure.
Threaded Rod
Primary Damper
Isolation
Boot
Tube & Reflector
Hanger w/ Chain
Hanging Set
Vibration
Isolators
Vacuum Pump
Control Box
Support Plate
4” Vent
Safety
Chain
Seam
Exhauster
Assembly
Exhaust Discharge
Power Box Tube & Reflector
Hanger w/ Chain
Hanging Set
Use appropriate hardware to
attach to structure.
Primary Damper
Note: Isolation boots are
not needed between the
damper and exhauster
assembly when using the
NC-7 Series exhauster on
an HLV system.
VACUUM
PUMP
MODEL NO.
TOTAL SYSTEM
INPUT RANGE
(BTU/H)
MAXIMUM
BURNERS
ON PUMP
NC-7 * 50,000 - 150,000 2
PB-8 50,000 - 275,000 4
PB-9 250,000 - 545,000 6
PB-10A 550,000 - 750,000 6

12
All systems are provided with a primary damper which is placed before the vacuum pump. Due to variations in
gas input and radiant tube length, secondary dampers should be placed at various points as necessary to balance
the system’s exhaust flow. A maximum of six dampers per system is allowed. The following are three typical
examples of damper placement:
Example #3 - Figure 2-12
A system containing two HLV-75 burners with unequal
lengths of radiant tube running to the vacuum pump
from each burner. This system requires a primary
damper at the vacuum pump and a secondary damper
before the tee (HLV-T) on the shorter tube length as
shown in Figure 2-12.
Example #2 - Figure 2-11
Figure 2-11 shows a system containing a HLV-75 burner
(gas input of 75 MBTU/H) and a HLV-100 burner (gas
input of 100 MBTU/H) with equal lengths of radiant
tube running to the vacuum pump from each burner.
This system required a primary damper at the vacuum
pump and a secondary damper before the tee (HLV-T)
serving the lower MBTU/H heater.
Example #1 - Figure 2-10
A system containing two HLV-75 burners with equal
lengths of radiant tube running to the vacuum pump
from each burner. This system required only a primary
damper as shown in Figure 2-10.
Figure 2-11Figure 2-10
Figure 2-12
2.6 Damper Application
Tube Heater Vacuum System
Tube Heater Vacuum Systems Installation, Operation, Maintenance and Parts Manual
Damper Application
HLV-75
SECONDARY DAMPER
SECONDARY
DAMPER
ISOLATION BOOT VACUUM
PUMP
HLV-T
PRIMARY DAMPER
HLV-100 20 FT
40 FT 40 FT
30 FT
30 FT
20 FT.
HLV-75HLV-75
PRIMARY DAMPER
VACUUM
PUMP
ISOLATION BOOT
HLV-75
SECONDARY DAMPER
SECONDARY
DAMPER
ISOLATION BOOT VACUUM
PUMP
HLV-T
PRIMARY DAMPER
HLV-75 20 FT
40 FT 30 FT

Burner Control Box
Hanger
Welded seam
must be positioned
downward
Swaged end
First tube (Alum-Ti)
downstream of the burner
control box - Referred to as
the Combustion Chamber
170-200 MBH models
require a stainless steel
tube clamp between the
first and second tubes.
Welded seam
must be positioned
downward
Swaged end
Hanger
First tube (Alum-Ti)
downstream of the burner
control box - Referred to as the
Combustion Chamber.
170-200 MBH models
require a stainless steel
tube clamp between the first
and second tubes.
Burner Control Box
13
1. Verify that all parts have been received by checking
them against the packing list. If anything is missing,
notify the Re-Verber-Ray representative or Detroit
Radiant Products.
2. Check the CSA rating label on the burner to verify
the model number, the gas to be used and that the
clearances to combustibles will be met.
3. Check the CSA rating label on the vacuum pump
to verify that it is adequate for the gas input (BTU/
H) of the system.
4. Identify the Alumi-Ti 10 ft. tube(s), and ensure that
one exists for each burner.
5. Following a layout drawing, determine the location
of the suspension points for the system in relation
to the building structure. Ensure that the finished
installation will conform to the design requirements
listed in the foreword, and the Clearances to
Combustibles Chart on page 5.
6. Each system is supplied with the necessary wire
hangers for suspending the burner, radiant tubing
and reflectors (see Figure 3-1).
7. Use of 12 gauge, size #1, double-loop chain (THCS)
is recommended when hanging the system.
8. Mounting chains must hang perpendicular to the
system.
9. The first 10 ft. of tube downstream from a burner is
typically a titanium alloy aluminized steel tube
(Alumi-Ti). Identify this tube and make sure it is
installed with welded seam down (see Figure 3-1).
Figure 3-1
Tube Heater Vacuum System Installation, Operation, Maintenance and Parts Manual
Installation
Pre-Installation
3.1 Pre-Installation

14
IMPORTANT: Mount burner control box and chain
sets level to the ground. Do not rotate control box
assembly.
IMPORTANT: 175,000 through 225,000 BTU/H
models must be installed with a stainless steel tube
clamp at the second joint of the exchanger between
the first and second radiant tubes.
IMPORTANT: Mount all tubes with welded seam
facing downward (see figure 3-3). Be sure to have
swaged ends pointed towards the exhaust end of the
heater.
NOTE: If windy conditions exist in the space around
the heater, it may be necessary to rigidly mount the
heater to prevent swaying. It is recommended that
threaded rod be used for the two hanging points at
the burner control box. The remaining hanging
points should use chains to allow for heater
expansion.
NOTE: The tube clamps provided with the heater
are pre-assembled at the factory. If a clamp is
dismantled, it is important that upon reassembly the
butt clamp’s spacer is properly inserted (see Figure
3-7). The spacer’s concave surface must face the
radiant tube. Incorrect spacer placement will result
in shearing of the bolt when torqued to the
recommended specifications (40-60-lb. ft.).
Figure 3-2
MOUNT BURNER BOX LEVEL
Figure 3-3
NOTE: When positioning heaters, keep in mind the
clearance to combustible materials, lights, sprinkler
heads, overhead doors, storage areas with stacked
materials, gas and electrical lines, parked vehicles,
cranes and any other possible obstructions or
hazards. Refer to the Warnings, Cautions and the
Clearance to Combustibles chart in the Safety
Information Section and on the heater to verify that a
safe installation condition exists.
IMPORTANT
•Do not exceed the maximum vent length for
exhausting the heater. Consult sections 3.7 &
3.8 for guidelines.
Consult Combustion Air Requirements section on
page 22.
•Do not exceed the maximum duct length for fresh
air intake. Consult Air Intake Duct Chart on page
22.
•Do not draw fresh air into the heater from an attic
space. There is no guarantee that adequate air will
be supplied.
• All unvented heaters must use P/N: WVE-GALV
vent with flapper.
Once all of the safety precautions and design criteria
are met, the actual installation of the heater may
begin.
INSTALLATION NOTES:
Tube Heater Vacuum System
Tube Heater Vacuum Systems Installation, Operation, Maintenance and Parts Manual
Pre-Installation
Threaded Rod or Chain Sets
BURNER
CONTROL
BOX
Threaded Rod or Chain Sets
Hanger
Hanger
Welded
Seam Down

3.2 Vacuum Pump Assembly and Mounting
15
Installation
Figure 3-4
Turnbuckle (Part# V-TB) is recommended on all
condensing pipe suspension points for ease of slope
adjustments.
Tube Heater Vacuum System Installation, Operation, Maintenance and Parts Manual
Assembly and Mounting
2 Install vacuum pump as shown on plan drawing.
Make sure pump is properly aligned with system.
Allow an 8" to 12" space for the isolation boot
between the primary damper and the vacuum
pump inlet adapter. See figure 3-6.
3. Mount the inlet and outlet adapters to the
vacuum pump using self-tapping sheet metal
screws, and seal the joints with high temperature
sealant. (The NC-7 does not require an inlet
adapter or isolation boots. See figure 3-5).
4. Install isolation boot with clamps provided.
See figure 3-6.
NOTE: The average sound level of the PB series
vacuum pumps is between 60 and 63 DBA. If a
lower sound level is required, relocation of the
vacuum pump or a sound-deadening enclosure may
be used. Consult factory.
1. Installation begins at the vacuum pump. Slope
condensing pipe downward 1/4” per 10 feet as it
approaches the pump (which is upward at 1/4” per
10 feet going from the pump). Standard radiant
pipe will be mounted level. Refer to figure 3-6 on
the following page.
2. It may be easiest to begin by mounting the first
tube with 2 hangers spaced approximately 8 to 9ft.
apart. Every 10 ft. tube thereafter should only
need 1 hanger spaced at approximately 8 to 9ft.
apart. Refer to figure 3-13 on page 18 for an
example of hanger placement.
3. It is critical that the tube mounting starts with the
run having the greatest amount of condensing
pipe. If there is no condensing pipe in the system,
start with the longest run.
4. Clamps must be placed directly over tube seams.
Refer to figure 3-7.
5. After the first run is completely installed with all
tubes, dampers, elbows, intersections, etc., install
the run with next greatest amount of condensing
pipe, and so on, until all runs are complete.
6. For ease of installation, install reflectors as each
tube section is installed (see section 3.5 for
instructions on reflector assembly).
7. Make sure all dampers have been properly placed
in the system and temporarily set each damper
to half-closed.
8. Adjust suspension hardware so tubes are straight.
Adjust chain lengths until standard radiant pipe is
level and the condensing pipe is at the proper
pitch. It is recommended that condensing pipe is
installed with turnbuckles (Part# V-TB) for ease of
sloping the tube(s). Refer to figure 3-4 for
suspension details.
9. Heater must be independently supported. It must
not rely on the gas or electrical lines for any of its
support.
10. Mount burner control box level and be sure that
the burner sight glass is visible from the floor.
Refer to figure 3-2.
1. Before mounting vacuum pump make sure that
the building structure and support brackets have
adequate load characteristics to support the
pump. See chart below.
3.3 Tube & Burner Box Mounting
Beam Clamp
Bar Joist Clip
Anchor Locknut
Wood
Beam
S-Hook Washers
Turnbuckle
Vacuum Pump
Model No.
Vacuum Pump
Weight (lbs.)
NC-7 20
PB-8 60
PB-9 67
PB-10A 73

Figure 3-6
Figure 3-5
Tube Heater Vacuum System
Tube Heater Vacuum Systems Installation, Operation, Maintenance and Parts Manual
Tube & Burner Box Mounting
16
Use appropriate hardware
to attach to structure.
NOTE: Isolation boots are not needed
between the damper and exhauster
assembly when using the NC-7 Series
exhauster on an HLV system.
Safety
Chain
Seam
Exhauster
Assembly
Exhaust
Discharge
Power Box Tube & Reflector Hanger w/ Chain Hanging Set
Primary Damper
Figure 3-7
Flat Surface
Turnbuckle Part# V-TB is
recommended for all
condensing tube
suspension points for
ease of slope adjustment.
Isolation
Boot
Inlet
Adapter
Primary Damper
1/4” per 10ft
Tube & Reflector Hanger w/ Chain Hanging Set
Vibration Isolators
Vacuum Pump
Control Box
Support Plate
AL-TISTANDARD PIPECONDENSING PIPE
All standard
exchanger pipe must
be installed level.
Tube ClampSwaged Tube
INCORRECT
CORRECT
Seam
Clamp
Concaved Surface

Installed
Baffle
Baffle Assembly
Installation
17
1. All systems include 99” of baffle. Baffle must be
installed as close to the pump as possibe in the
section of tubing that allows insertion of the
entire length of baffle. Refer to figure 3-8.
2. As shown in figure 3-9, assemble the baffle to
the proper length. Baffle assembly may be done
on the ground or assembled in increments of 33”
while being fed into the tube.
Place male side (tab fittings) against
female side (keyhole) at a 90° angle.
Center tabs. Repeat process as
necessary to complete entire baffle.
With tabs centered, rotate baffle
90° to complete assembly.
Place opposite tab through keyhole
and slide back to the center position.
Insert one tab into keyhole
and slide fully to one side.
Place complete baffle into radiant tubes.
Install baffle in the horizontal position.
Figure 3-9
3.4 Baffle Assembly & Installation Instructions
NOTE: Install assembled baffle so that the key hole
is inserted first. All baffles must be placed
horizontally in the radiant tube/heat exchanger as
shown in figure 3-9.
NOTE: In some applications it may be necessary to
remove one, two or all three baffle sections to
achieve proper static pressure at the burner box.
Consult Factory.
Figure 3-8
Tube Heater Vacuum System Installation, Operation, Maintenance and Parts Manual

18
1. Mount reflector center support (RCS) at halfway
point between hangers (see figure 3-10).
2. Slide reflectors through wire hangers and overlap
mating reflector ends four inches for support (see
figure 3-11). Install sheet metal screws as shown.
3. Install elbow and tee reflector assemblies if used.
4. Install elbow and tee reflector end-caps at any
exposed ends of the reflectors using four clips per
end cap (see figure 3-12).
Figure 3-13
Figure 3-11
Figure 3-12Figure 3-10
RCS
Hanger
Approx.
9-8 Ft.
Approx. 4 in.
Overlap
16-18 in.
Approx.
8’-10”
Reflector Tension Spring
Clips
Reflector End Cap
Tube Heater Vacuum System
Tube Heater Vacuum Systems Installation, Operation, Maintenance and Parts Manual
Reflector Assembly
Reflector Tension
Spring
Reflector
Secure reflectors with
sheet metal screws at all
non-expansion joints.
Note: Leave an expansion joint in
each run of reflector, the preferred
location is between reflector one and
two.
Reflector
Expansion
Joints
First installed tube(s) can be
mounted using two hangers.
Reflector
Expansion
Joints
All tube(s) installed after the
first tube typically require
only one hanger.
3.5 Reflector Assembly

Reflector Elbows (Part No. RE) are designed to fit
atop an elbow tube fitting (see figure 3-16).
“U” Reflectors (Part No. RU) cover TF1B “U” Fittings.
They attach to standard reflectors covering the end of
a “U” configuration (see figure 3-17). Reflectors cannot
be rotated after installation of this accessory.
Figure 3-14
19
Different applications will require the use of reflector
accessories. Available options include side shield
extensions, protective guards, elbow or U shields,
stainless steel reflectors and drop ceiling panels.
Consult the Detroit Radiant Products Accessory Guide
for detailed product information.
Side Shield Extensions. (Part No. SSE) Designed to
direct infra-red rays downward, away from sidewalls
and combustibles. This includes stored combustible
containers, heating between two large vehicles, crane
rail motors, wiring and other applications that require
protection. Figure 3-14 details a side shield assembly
installation. Figure 3-15 shows where to measure the
new clearances from. See page 5 for data on these
clearances.
Figure 3-15
Figure 3-16 (RE) Figure 3-17 (RU)
Reflector Accessories
Installation
Tube Heater Vacuum System Installation, Operation, Maintenance and Parts Manual
3.6 Reflector Accessories
Protective Guards. (Part No. PG) Designed to attach
to the standard reflector. They are typically used to
prevent debris or objects from becoming lodged
between the radiant tube and reflector.
Aluminum Egg Crate. (Part No. EC) is designed to fit
into a standard 2’ x 4’ ceiling tile opening. Drop ceiling
side panels (Part No. DCSP) are needed for complete
installation of egg crate. The side panels are used to
direct infra-red rays away from ceiling tiles.
Protective Heat Shields (Part No. PHS) attach below
reflector to shield heat sensitive areas. Can only be
used on 00 mounted reflectors.
Stainless Steel Reflectors (Part No. SSR or SSRAO)
are also available for applications in harsh
environments.
See the Accessory Guide for product specific
information.
Top
Below
Behind
Front
Top
Below
Behind
Front
Overlap
(Approx. 4”) Overlap
(Approx. 4”)

20
•Check all applicable codes prior to installing any
exhaust vent. Local codes may vary. In the
absence of local codes see the National Fuel
Code ANSI Z223.1 (NFPA 54) latest edition. This
system is designed to operate with a 4” diameter
exhaust vent.
•It is recommended that single-wall vent material
be used. The portion of the vent which goes
through combustible material in the building wall
or roof must pass through a dual insulated vent
sleeve with an approved 1 inch clearance thimble
(see Figure 3-18 and 3-19).
•Vertical vents which exit through the roof should
be at least 24 in. higher than any portion of the
building within a horizontal radius of 10 ft. of
where it passes through the roof of the building
(see Figure 3-18). A standard rain/vent cap may
be used to shield the vent.
•The vent tube length allowed must be between 2
ft. and 25 ft. Do not use more than two 90°
elbows in the vent (all models).
•Horizontal venting must be terminated using a
vent cap with flapper (HLV-WVE) and have a 1
inch clearance from combustible walls (see Figure
3-19). Through the wall venting shall not
terminate over public walkways and must be at
least 4 ft. below, 4 ft. horizontally from, or 1 ft.
above any door, window or gravity air inlet into
any building.
•All vent tubes must be sealed to prevent leakage
of flue gas into building.
•Single-wall vent tube that is exposed to cold air
must be insulated to prevent condensation.
•Vent cap must be protected from blockage by
snow.
•The building must be protected from damage by
flue gases.
•Use single wall aluminum flue pipe – minimum 26
ga.
Typical Vertical Venting for Non-Condensing Systems Typical Horizontal Venting for Non-Condensing Systems
Figure 3-18 Figure 3-19
The following guidelines must be observed to ensure proper system performance and safety.
Tube Heater Vacuum System
Tube Heater Vacuum Systems Installation, Operation, Maintenance and Parts Manual
Flue Venting
3.7 Flue Venting for Non-Condensing Systems