Detroit Radiant Products GTD-20 User manual

0086
GTD Series
Installation, Operation,
Maintenance and Parts Manual
WARNING
!
CE Certified 230V-50Hz. Infrared Tube Heater.
The GTD Series Infrared Tube Heater is a positive pressure, dual-stage radiant heater system. All persons
involved with the installation, operation and maintenance of the heater system must read and understand the
information in this manual.
For Your Safety
If you smell gas:
• Do not try to light any appliance. • Immediately call your gas supplier from a neighbor’s phone.
• Do not touch any electrical switch. • Follow the gas supplier’s instructions.
• Do not use any phone in your building. • If you cannot reach your gas supplier, call the fire department.
Keep these instructions for future reference.
This heater
must be installed and serviced by a Gas Safe Registered Gas Engineer only!
Conversion of the heater for use with other gases must be carried out by a Gas Safe
Registered Gas Engineer. Read these instructions carefully before attempting to install,
operate or service the heater.
This heater is not approved for use in indoor residential applications and must never
be installed indoor in the home. This heater may only be used in outdoor residential
applications or indoor/outdoor commercial (or industrial) applications. Installation in
residential indoor spaces may result in property damage, asphyxiation, serious injury or
death.
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.
Failure to comply with these warnings and instructions, and those on the heater, could
result in personal injury or death.
LIOGTD-Rev. 4809
Print: 2/09-r4_11/7/12(DRP)
Replaces: LIOGTD-2/09(DRP)

1.0 GTD SERIES TECHNICAL SPECIFICATIONS ................................................................................................ 3
2.0 SAFETY ........................................................................................................................................................... 4
2.1 Warning Symbols............................................................................................................................... 4
2.2 Applications ....................................................................................................................................... 4
2.3 Codes and Regulations ..................................................................................................................... 5
2.4 Clearance to Combustibles ................................................................................................................ 6
3.0 INSTALLATION ................................................................................................................................................ 8
3.1 Design Considerations and Prechecks .............................................................................................. 8
3.2 Recommended Mounting Heights .....................................................................................................10
3.3 Hanger Placement and Suspension ..................................................................................................11
3.4 Optional U-Bend or Elbow Accessory Configuration .........................................................................14
3.5 Radiant Tube Assembly .....................................................................................................................15
3.6 Burner Control Box Suspension ........................................................................................................18
3.7 Reflector Assembly ............................................................................................................................19
3.8 Baffle Assembly and Placement ........................................................................................................21
3.9 Flueing ...............................................................................................................................................23
3.10 Combustion Air Requirements ...........................................................................................................27
3.11 Gas Supply ........................................................................................................................................29
3.12 Electrical Requirements .....................................................................................................................33
4.0 OPERATION .....................................................................................................................................................35
5.0 MAINTENANCE ...............................................................................................................................................36
5.1 Troubleshooting Guide .......................................................................................................................37
6.0 PARTS ...........................................................................................................................................................38
6.1 Burner Assembly Components ..........................................................................................................38
6.1 Tube and Reflector Components .......................................................................................................39
7.0 GTD Series Kit Contents ................................................................................................................................40
1.0 Introduction - GTD Series Installation, Operation, Maintenance and Parts Manual
Contents
2
AVAILABLE MODELS
Model
Number
High Fire
Rate
Low Fire
Rate Length (Install Kit )
Combustion
Chamber Radiant Tubes
GTD-20 20 kW 15 kW 6M (20-kit) 9M (30-kit) 12M (40-kit) Aluminized Aluminized or HRT
GTD-25 25 kW 15 kW 6M (20-kit) 9M (30-kit) 12M (40-kit) Aluminized Aluminized or HRT
GTD-30 30 kW 20 kW 9M (30-kit) 12M (40-kit) 15M (50-kit) Aluminized Aluminized or HRT
GTD-35 35 kW 30 kW 12M (40-kit) 15M (50-kit) Aluminized Aluminized or HRT
GTD-40 40 kW 30 kW 12M (40-kit) 15M (50-kit) 18M (60-kit) Aluminized Aluminized or HRT
GTD-45 45 kW 30 kW 12M (40-kit) 15M (50-kit) 18M (60-kit) Titanium & Aluminized Aluminized or HRT
GTD-50 50 kW 35 kW 12M (40-kit) 15M (50-kit) 18M (60-kit) Titanium & Aluminized Aluminized or HRT
GTD-55 55 kW 40 kW 15M (50-kit) 18M (60-kit) 21M (70-kit) Titanium & Aluminized Aluminized or HRT
GTD-60 60 kW 45 kW 15M (50-kit) 18M (60-kit) 21M (70-kit) Titanium & Aluminized Aluminized or HRT
Length (Install Kit )

All Models:
Gas Connection: ISO-7 BSP
Flue Diameter: 100 mm.
Model
(Input)
Gas
Type
Injector
(mm)
Injector
Markings
(DMS)
Air Inlet
Orfice
(mm)
Air Inlet
Marking
Min. Gas
Pressure
(mbar)
Max.
Gas
Pressure
(mbar)
High
Rate
Burner
Pressure
(mbar)
Low
Rate
Burner
Pressure
(mbar)
Air
Proving
Set
Point
(mbar)6 9 12 15 18 21
GTD 20
(20 kW)
G20 3.98 22 36.5 1 7/16 11.5 20 9.0 5.5 3353 3353 2515
0.50G25 3.98 22 36.5 1 7/16 15.5 25 13.0 9.0 3353 3353 2515
G31 2.48 40 36.5 1 7/16 27.5 37 25.0 15.0 3353 3353 2515
GTD 25
(25 kW)
G20 4.39 17 39.7 1 9/16 11.5 20 9.0 5.5 4217 3353 2515
0.50G25 4.39 17 39.7 1 9/16 15.5 25 13.0 9.0 4217 3353 2515
G31 2.70 36 39.7 1 9/16 27.5 37 25.0 15.0 4217 3353 2515
GTD 30
(30 kW)
G20 4.85 11 41.3 1 5/8 11.5 20 9.0 5.5 4217 2515 1677
0.63G25 4.85 11 41.3 1 5/8 15.5 25 13.0 9.0 4217 2515 1677
G31 2.94 32 41.6 1 7/8 27.5 37 25.0 15.0 4217 2515 1677
GTD 35
(35 kW)
G20 5.21 5 44.5 1 3/4 11.5 20 9.0 5.5 4217 3353 1677
0.63G25 5.21 5 44.5 1 3/4 15.5 25 13.0 9.0 4217 3353 1677
G31 3.04 31 47.6 1 7/8 27.5 37 25.0 15.0 4217 3353 1677
GTD 40
(40 kW)
G20 5.30 4 44.5 1 3/4 11.5 20 9.0 5.5 3353 2515 1677
0.75G25 5.30 4 44.5 1 3/4 15.5 25 13.0 9.0 3353 2515 1677
G31 3.45 29 50.8 2 27.5 37 25.0 15.0 3353 2515 1677
GTD 45
(45 kW)
G20 5.79 1 46.0 1 13/16 11.5 20 9.0 5.5 2515 1677 1677
0.83G25 5.79 1 46.0 1 13/16 15.5 25 13.0 9.0 2515 1677 1677
G31 3.65 27 50.8 2 27.5 37 25.0 15.0 2515 1677 1677
GTD 50
(50 kW)
G20 6.14 C 57.2 2 1/4 11.5 20 9.0 5.5 2515 1677 1677 838
1.00G25 6.14 C 57.2 2 1/4 15.5 25 13.0 9.0 2515 1677 1677 838
G31 3.86 24 57.2 2 1/4 27.5 37 25.0 15.0 2515 1677 1677 838
GTD 55
(55 kW)
G20 6.75 H 61.9 2 7/16 11.5 20 9.0 5.5 1677 838 838
1.00G25 6.75 H 61.9 2 7/16 15.5 25 13.0 9.0 1677 838 838
G31 4.08 20 61.9 2 7/16 27.5 37 25.0 15.0 1677 838 838
GTD 60
(60 kW)
G20 7.03 J 63.5 2 1/2 11.5 20 9.0 5.5 838 838 838
1.13G25 7.03 J 63.5 2 1/2 15.5 25 13.0 9.0 838 838 838
G31 4.21 19 66.7 2 5/8 27.5 37 25.0 15.0 838 838 838
Baffle Length
by Model Length (mm)
1.0 GTD Series Technical Specifications
1.0 Specifications - GTD Series Installation, Operation, Maintenance and Parts Manual
3

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
!
2.1 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.
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
competent and authorized persons may install or service this equipment and in
accordance with relevant clauses of applicable standards and recommendations.
4
2.2 Applications
This is not an explosion-proof heater. Consult the local Fire Marshall, fire insurance carrier and other
authorities for approval if the proposed installation is in question.
Not for residential use!
Do not use this heater in the
home, sleeping quarters,
attached garages, etc.
WARNING
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.
2.0 Safety - GTD Installation, Operation, Maintenance and Parts Manual
2.0 Safety
Not for residential use!
Do not use this heater in the
home, sleeping quarters,
attached garages, etc.
WARNING
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.
!
The intent of this manual is to provide information regarding genral 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.

2.3 Codes and Regulations
2.0 Safety - GTD Series Installation, Operation, Maintenance and Parts Manual
The following must be reviewed before installing this heater:
• Check the heater rating label on the heater to verify the proper gas to be used. Check other labels on
the heater to verify proper mounting and clearance to combustibles.
• Signs must be posted in storage areas to specify maximum stacking heights allowed in order to
maintain published clearances to combustibles.
• Not withstanding their limited scope, this appliance must be installed in accordance with relevant
provisions of the following regulations:
IE - Ireland:
I.S.3212:1987, ICP 4, I.S.327. Due account should be taken of any obligations arising for the current
Building Regulations, the current I.E.E. Regulations and other relevant codes of practice.
GB - United Kingdom:
Gas Safety (Installation and Use) Regulations 1998 and BS6891:1998. Due account should be
taken of any obligations arising from the Health and Safety at Work etc. Act 1974, the current Building
Regulations, the current I.E.E. Regulations and other relevant codes of practice.
• Under no circumstance is either the gas supply line or the electrical supply line to the heater to
provide any assistance 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 or sprinkler heads shall be located within the
minimum published clearance to combustibles as shown on page 7.
5
BS EN 13410:2001
Gas fired overhead radiant heaters “Ventilation requirements for non-domestic premises” should be
observed.

This heater should be installed so
that the minimum clearances 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.
Fire Hazard. Always maintain
published clearance to
combustibles. Failure to comply
with the stated clearances to
combustibles could result in personal injury,
death and/or property damage.
WARNING
This is not an explosion-proof
heater. Do not store or use
flammable objects, liquids or vapor
in the vicinity of the heater. Where
there is the possibility of exposure
to flammable vapors or highly combustible
materials, consult the local fire marshall, fire
insurance carrier and other authorities for
approval of the proposed installation.
WARNING WARNING
2.0 Safety - GTD Installation, Operation, Maintenance and Parts Manual
2.4 Clearance to Combustibles
Hazards
For maximum safety, the building must be evaluated
for hazards before installing this heating system.
A critical safety factor before installation is the
clearance to combustibles.
Clearances to combustibles is defined as the
minimum distance that must be maintained
between the tube surface or reflector and
combustible materials. It also pertains to the
distance that must be maintained from moving
objects (e.g. overhead doors, cranes, vehicle lifts,
etc.) around the tube heater.
If you are unsure about the proposed intallation, consult your local fire marshall, fire insurance carrier or
other qualified authorities for the approval of the proposed installation.
Safety Signs and Labels
It is important to provide warnings to alert individuals to potential hazards and safety actions. Local
codes may require you to post a sign “specifying the maximum permissible stacking height to maintain
the required published clearances from the heater to combustibles” near the heater’s thermostat or, in the
absence of such thermostats, in a conspicuous location.
All safety labels must be maintained on this appliance. Contact your distributor if replacement labels are
needed.
• Gas and electrical lines
• Combustible and explosive materials
• Chemical storage areas
• Areas of high chemical fume concentrations
• Vehicle parking areas
• Vehicle lifts
• Hoists or cranes
• Storage areas with stacked materials
• Lighting
• Sprinker heads
• Overhead doors and tracks
• Dirty, contaminated areas
6
The following is a partial list of items to maintain clearances from:
!
!
!

2.0 Safety - GTD Installation, Operation, Maintenance and Parts Manual
Clearance to Combustibles
IMPORTANT:
For the safe installation of this unit, the clearance to combustibles data below contains clearances that must
be maintained.
Check the rating plate on the heater to verify the minimum clearance to combustibles and gas type for your
model heater.
GTD Series Clearance to Combustibles Data (mm)
7
Model No. (kW)
Mounting
Angle* Front Behind Top Below
GTD 20 0° 229 229 152 1524
45° 991 203 254 1524
w/ 1 side shield 0° 737 203 152 1524
w/ 2 side shields 0° 229 229 152 1524
6.1m downstream of burner 0° 178 178 152 762
GTD 25, GTD 30 0° 356 356 152 1676
45° 991 203 254 1676
w/ 1 side shield 0° 737 203 152 1676
w/ 2 side shields 0° 406 406 152 1676
6.1m downstream of burner 0° 178 178 152 762
GTD 35 0° 508 508 152 1930
45° 1473 203 254 1930
w/ 1 side shield 0° 1067 203 152 1930
w/ 2 side shields 0° 508 508 152 1930
6.1m downstream of burner 0° 178 178 152 762
GTD 40, GTD 45 0° 610 610 152 2057
45° 1473 203 254 2057
w/ 1 side shield 0° 1067 203 152 2057
w/ 2 side shields 0° 584 584 152 2057
6.1m downstream of burner 0° 279 279 152 1118
GTD 50 0° 864 864 152 2237
45° 1600 203 254 2237
w/ 1 side shield 0° 1270 203 152 2237
w/ 2 side shields 0° 762 762 152 2237
6.1m downstream of burner 0° 279 279 152 1118
GTD 55, GTD 60 0° 1041 1041 152 2388
45° 1600 203 254 2388
w/ 1 side shield 0° 1372 203 152 2388
w/ 2 side shields 0° 762 762 152 2388
6.1m downstream of burner 0° 279 279 152 1118
Heaters mounted on an angle between 0° to 45° must maintain clearances posted
for 0° or 45° mounting angles; whichever is greater.
*
0° Mounting
Angle Top
Side Side
Below
45° Mounting
Angle
Top
Front Behind
Below
0° w/ 1 Side
Shield
Top
Front Behind
Below
0° W/ 2 Side
Shields
Top
Side Side
Below
Side

3.0 Installation - GTD Installation, Operation, Maintenance and Parts Manual
3.0 Installation
Placement of infra-red tube heaters is influenced by many factors. Aside from safety factors,
considerations such as the number of elbows that are allowed, maximum vent lengths, ducting of
combustion air and combining vents are a few examples. It is critical that all guidelines and instuctions are
followed.
To ensure a properly designed heating system, a heating layout should be developed for the correct
placement of the burner control box, radiant tubing, venting and combustion air intake ducts. Inspect and
evaluate the mounting conditions, vent locations, gas supply and electrical wiring. Refer to the chart below
for the recommended distances for the model being installed.
3.1 Design Considerations and Prechecks
NOTE: The effective infrared surface temperature
of a person or object may be diminished with wind
above 8 km/h. The use of adequate wind barrier(s)
may be required.
NOTE: 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.
Heaters installed and serviced in accordance with
the installation manual do not emit odors into the
environment. See notice on page 28 for additional
information.
• Has the building’s heat loss been evaluated?
• Does the design meet the needs of the space?
• Have all clearance to combustible situations been
observed?
• Have recommended mounting heights 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 protective guards, side shields, ‘U’ or ‘L’
reflector covers needed?
• Does the heater require outside fresh air for
combustion?
• Is the enviroment harsh or contaminated
(requiring outside air for combustion)?
• Are chemicals or vapor a concern (requiring
outside air for combustion)?
When designing an infrared radiant heating system, consider the following:
8

3.0 Installation - GTD Installation, Operation, Maintenance and Parts Manual
Design Scenario
9
A tube heater system is being installed in 27.4m (L) x 15.2m (W) space with 4.3m ceilings. Two overhead
doors are located at one end and an equipment storage area exists on one side. The calculated heat load
is 110 kw.
Figure 3.1 - Poor Design
Doors and
tracks
Too Cold Too Hot
Equipment storage
50’
80’ - 200,000 BTU, Typ. 2
Doors and
tracks
90’
Gas Supply
Doors and
tracks
Doors and
tracks
Equipment storage
Better Heat Distribution
Sidewall Vent, Type 2
15.2m
27.4m
Gas Supply
12.2m - 22 kw, Typ. 4
Figure 3.2 - Good Design
• Two burners (55 kw each) are
placed at one end, opposite
the area of highest demand
(overhead doors).
• Recommended mounting
heights are not observed.
• Produces an uneven heat
distribution.
• Four burners (30 kw each)
are placed in each corner.
Burner (hotter) ends direct
heat to areas of highest heat
demand.
• Recommended mounting
heights observed.
• Distributes heat more evenly.
24m - 55.0 kW
12m - 30.0 kW

3.0 Installation - GTD Series Installation, Operation, Maintenance and Parts Manual
Design Criteria
3.2 Recommended Mounting Heights
NOTE: Factory recommended mounting heights are listed as a guideline. If infrared heaters are mounted too low or
too high, they may result in heat discomfort or lack of heat. It is generally recommended to observe 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 of the factory
recommended mounting heights. Clearances to combustibles must always be maintained.
10
GTD Model Length (M) kW Range Recommended Mounting Heights (M) Coverage Straight Config. (LxW) (M) Coverage U-Tube Config. (LxW) Distance Between Heater Rows (M) Dim. A Distance Between Heater Rows (M) Dim. B Max. Distance Between Heaters and Wall (M) Dim. C
6M 15 kW 3.0 to 4.6 6.1 x 3.7 3.7 x 3.7 3.0 to 6.1 6.1 to 12.2 4.9
20-25 kW 3.3 to 6.1 6.7 x 4.6 N/A 6.1 to 9.1 9.1 to 15.2 5.5
9M 15 kW 3.0 to 5.5 9.2 x 4.3 5.2 x 4.0 3.0 to 6.1 6.1 to 12.2 5.2
20-30 kW 3.7 to 7.0 10.0 x 5.5 5.5 x 4.6 6.1 to 9.1 9.1 to 15.2 6.1
12M 15 kW 3.3 to 5.5 12.2 x 4.9 6.7 x 4.3 3.0 to 6.1 6.1 to 12.2 6.1
20-35 kW 3.7 to 7.6 13.4 x 6.4 7.0 x 5.2 6.1 to 9.1 9.1 to 15.2 6.1
40-50 kW 4.6 to 9.2 13.7 x 7.9 7.3 x 6.1 9.1 to 12.2 12.2 to 18.3 7.6
15M 30-35 kW 4.6 to 8.2 16.8 x 7.3 8.5 x 5.8 6.1 to 9.1 9.1 to 15.2 7.6
40-60 kW 4.9 to 12.2 17.0 x 9.2 8.8 x 7.0 9.1 to 12.2 12.2 to 18.3 7.6
18M 40-60 kW 4.9 to 12.2 20.4 x 10.4 10.4 x 7.9 9.1 to 12.2 12.2 to 18.3 7.6
Dim. C
Dim. A
Dim. B
Dim. C
Dim. A
Note: Dimensions A, B & C are based upon heaters hung at the factory recommended mounting height.
Figure 3.3 • Recommended Mounting Heights and Distances - see chart 3.2 for dimensions.

3.3 Hanger Placement and Suspension
WARNING
Improper suspension of the heater may result in collapse and being crushed. Always
suspend the appliance from a permanent part of the building structure that can
support the total weight and force of the heater.
WARNING
Failure to maintain the published clearance to combustibles may result in fire and/or
explosion, property damage, serious injury or death. Always maintain clearances and
post signs where needed.
Suspension of the heater must conform to applicable codes referenced in the Safety section and these
instructions.
Lay radiant tubing out in the following order. Position tubes in their approximate locations. Figure 3.4.
• Primary combustion chamber.
• Radiant emitter tubes.
IMPORTANT! 45-60 kW models must use the titanium alloy treated steel combustion chamber
as the first tube connected to the burner control box. The combustion chamber has an orange
identification sticker located on the swaged end of the tube.
Mark locations for hanging points. Figure 3.4.
NOTE: If the available hanging points do not allow for the recommended spacing (or if an
alternative hanging method is utilized) then additional hangers may be necessary.
• The spacing between the burner control box mounting brackets and the first hanger should be
approximately 711mm.
• The space between the first two hangers placed on the first tube should be approximately
2692mm.
• The space between hangers thereafter, one per tube, should be approximately 2946mm.
11
3.0 Installation - GTD Series Installation, Operation, Maintenance and Parts Manual
!
!
2
1

16” Burner Tube
3m Primary Combustion Chamber
NOTE: Type varies depending on
model, Refer to model specification
chart on page 2.
Radiant Emitter Tube
NOTE: If applicable, placement of
Secondary Combustion Chamber.
Refer to model specifcation chart on
page 2 (45 kW models only).
Burner Control Box
Radiant Emitter
Tube(s)
Suspension
Point
Burner Control Box
Suspension Points
Suspension
Point
Stainless Steel Tube Clamp
(50-60 kW models only)
711mm
2692mm
2946mm
Suspension Point
3.0 Installation - GTD Series Installation, Operation, Maintenance and Parts Manual
Hanger Placement and Suspension
Figure 3.4 • Heater Suspension Layout
Heater Mounting Requirements and Weights
NOTE:
A sticker identifying the combustion chamber(s)
is located on the swaged end of the tube(s).
12
GTD Model Length (M) Dimension Straight Config. (mm) Tube & Reflector Suspension Points Control Box Stabilizer Shipping Weight (kg) Stainless Steel Ship Weight (kg) Chain Set Qty. Straigt Config. Chain Set Qty. U-Tube Config. Optional Brass Knuckles (P/N: BK) Optional Single Mount Bracket (P/N: SMB) U Config. Only.
6M 6580 3 2 54.5 66.0 5 6 3 2
9M 9530 4 2 73.0 88.5 6 7 4 3
12M 12470 5 2 86.5 107.0 7 8 5 3
15M 15420 6 2 107.0 132.0 8 9 6 4
18M 18360 7 2 102.5 150.0 9 10 7 4
2946mm

S-Hook and
#1 double-loop
chain
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 Installationy - GTD Series Installation, Operation, Maintenance and Parts Manual
Hanger Placement and Suspension
Suspension of the heater must conform to applicable codes referenced in the Safety section and these
instructions.
Prepare the mounting surface, if necessary, such as: weld blocks, drill holes. Figure 3.5.
NOTE: The burner control box and radiant tubes should be in straight alignment and level.
Fasten beam clamp, screw hook or other type of suspension anchor to hanging point.
Attach and close S-hook and #1 double-loop chain to anchor. Check that it is securely attached.
NOTE: Threaded rod and turnbuckles may be used.
Attach hangers to chains. Adjust chain lengths until radiant tubing is level and equal weight distribution
is achieved. NOTE: Chains must be straight up and down. Do not install chains at an angle as this can
result in tube warpage or separation.
Figure 3.5 • Mounting the Hangers
13
4
3
6
5
4
3
6
5
3
4
6
3
6
5
3
4
6

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 Knuckle
(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 3.6 • U-Tube Hanger Mounting Options
Figure 3.7 • Angled Hanger Mounting Options
Exhaust
End
Single Mounting
Bracket
Brass Knuckle
3.0 Installation - GTD Series Installation, Operation, Maintenance and Parts Manual
3.4 Optional U-Bend or Elbow Accessory Configuration
14
NOTE: 9M and 15M models require 5EA-SUB accessory package when intalling in a ‘U’ configuation

Slide tube clamps onto radiant tubes (see Figure 3.9).
15
To install the radiant tubes:
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 3.8).
Refer to section 3.8 on page 21 for tube installation sequence.
Figure 3.8 • Attach Hangers
Figure 3.9 • Attach Tube Clamps
Hanger
Welded seam
faces down
Swaged end
Tube Clamp
Radiant Tube
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 - GTD Series Installation, Operation, Maintenance and Parts Manual
3.5 Radiant Tube Assembly
1
2

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 proper
torque is achieved (normally when
seam becomes visible).
Correct Tube Connection Incorrect Tube Connection
90 Degree Elbow Bend 180 Degree
U-Bend
Figure 3.11 • Optional Tube Connections
(P/N: TF1B)
(P/N: E6)
3.0 Installation - GTD Series Installation, Operation, Maintenance and Parts Manual
Radiant Tube Assembly
Slip-fit the radiant tube sections together until tightly connected (install swaged end of each tube towards
exhaust end). NOTE: If it is difficult to mate the tubes, they may be installed incorrectly.
Center tube clamps over the seams 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 while operating.
Tighten tube clamp bolts to secure. When proper compression is obtained (30-44 Nm), the tube seam
will create a visible mark on the tube clamp. NOTE: Excessive torque may damage the tube clamp.
Determine the location of the burner control box and note the placement of the mounting chains.
Figure 3.10 • Tube Connections
Optional U-Bend or Elbow Accessory Configurations
A 180 degree U-bend or 90 degree accessory fitting may be installed in the radiant tube heater system.
Refer to page 17 for minimum distance requirements from the burner control box.
When installing a U-bend or Elbow Accessory Fitting:
• The top clearance of an uncovered (no reflector) U-bend or elbow accessory fitting to combustibles is
458mm.
• If operating the heater un-vented, separate the intake air to the heater from its exhaust products a
minimum of 1220mm; further separation may be necessary (see figure 3.12). Outside combustion air
may also be supplied.
• A maximum of one 180° U-bend or two 90° elbows can be installed on a heater.
• Omit one 840mm section of turbulator baffle. Refer to Baffle Assembly on pages 21 & 22.
16
3
4
5
6

3.0 Installation - GTD Installation, Operation, Maintenance and Parts Manual
Radiant Tube Assembly
Figure 3.12 • Elbow and U-Bend Clearances
Minimum Distance from Burner Control Box to
U-Bend or Elbow Accessory
Overall Dimensions for Heaters
Configured with U-Bend (P/N: TF1B)
17
GTD Model Input (kW) Dimension A (mm)
GTD 20 3050
GTD 25, 30 3050
GTD 35 4570
GTD 40, 45 6100
GTD 50 7620
GTD 55, 60 7620
GTD Model
Length
Dimension B (mm)
6M 3963
9M 5385
12M 6909
15M 8332
18M 9856
Dimension A
U-Bend can be set in both directions
305mm
Figure 3.13 • U-Bend and Elbow Dimensions
Elbow can be set
in both directions
Tube Clamp Tube Clamp
Dimension A
Dimension B
P/N: TF1B
P/N: E6
203mm
410mm
410mm
150mm
510mm
250mm
460mm
Tube Clamp Tube Clamp
318mm
318mm

3.0 Installation - GTD Series Installation, Operation, Maintenance and Parts Manual
3.6 Burner Control Box Suspension
18
327 mm 406 mm
826 mm
114 mm
238 mm
219 mm
470 mm
102 mm
286 mm
406 mm
Figure 3.14 • Burner Control Box Assembly • Side View
Burner Sight Glass
Burner Control Box tube is in
straight alignment with Primary
Combustion Chamber
Figure 3.15 • Burner Control Box with U-Bend • End View
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 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.
Determine the mounting chain locations for hanging the burner control box.
Fasten beam clamp, screw hook or other type of suspension anchor to hanging point.
Attach S-Hook and #1 double loop chain (P/N: THCS) to anchor. Check that it is securely connected.
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.
1
2
3
4
12
3
4

To install the reflectors:
Attach reflector center supports onto radiant tubes.
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 102mm.
To prevent the reflectors from shifting, secure the reflector sections together using sheet metal screws
except at the expansion joint (see page 21). NOTE: Installer to provide sheet metal screws.
Attach reflector end caps, with polished side inward, to each end of the reflector run.
Reflectors, and reflector accessories, direct infrared energy to the floor level. The reflector assembly
depends on the heater configuration, proximity to combustibles and the space surrounding the heater.
Before you begin assembly, determine if the use of reflector accessories are necessary (see page 20).
Figure 3.16 • Reflector Assembly
100mm approx.
overlap
Reflector Center
Support
Radiant
Tube
Hanger
and Chain
Place at the
mid-point
of the tube
Reflector
End Cap
Reflector
Tension
Spring
Clips
3.0 Installation - GTD Series Installation, Operation, Maintenance and Parts Manual
3.7 Reflector Assembly
19
Reflector
1
2
3
4

Figure 3.17 • Reflector Shield Accessories
Side shield extension (P/N: SSE)
Directs infrared rays downward, away
from sidewalls and combustibles.
Elbow reflector (P/N: RE)
Used over a 90-degree elbow
radiant tube.
U-shaped reflector (P/N: RU)
Used over a ‘U’-shaped
radiant tube.
3.0 Installation - GTD Series Installation, Operation, Maintenance and Parts Manual
Reflector Assembly
Common Optional Accessories
* Reflectors cannot be rotated when used with this accessory.
^ Refer to the Clearance to Combustibles chart on page 7 for minimum distances to combustibles when side shield extension(s)
are used.
Reflector Accessories Description Part #
Elbow Reflector* 90° bend, highly polished aluminum reflector elbow. Designed to fit
atop one elbow accessory fitting.
RE
U-Reflector* 180° bend, highly polished aluminum reflector U-bend. Designed to fit
atop one U-bend accessoy fitting.
RU
Side Shield Reflector *^ Highly polished side shield extension used to direct infrared rays
downward, away from side walls and combustibles.
SSE
Protective Guard Used to prevent debris or objects from becoming lodged between the
radiant tube and reflector. Required when mounting below 2438 mm.
PG
20