Page 1
®
WARNING
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. DO NOT try to light any appliance.
3. DO NOT use electrical switches.
4. DO NOT use any telephone in
your building.
5. Extinguish any open flame.
6. Leave the building.
7. Immediately call your local gas
supplier after leaving the building.
Follow the gas supplier’s
instructions.
8. If you cannot reach your gas
supplier, call the Fire Department.
Fire Hazard
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
Some objects can catch fire or explode
when placed close to heater.
Failure to follow these instructions can
result in death, injury or property
damage.
WARNING
Installation must be done by a contractor qualified
in the installation and service of gas-fired heating
equipment or your gas supplier.
Improper installation, adjustment, alteration, service
or maintenance can result in death, injury or
property damage. Read the Installation, Operation
and Service Manual thoroughly before installing or
servicing this equipment.
Installer
Please take the time to read and understand
these instructions prior to any installation.
Installer must give a copy of this manual to the owner.
Owner
Keep this manual in a safe place in order to provide
your serviceman with necessary information.
Vantage
NP
Negative Pressure
Unitary or Multiburner
Infrared Heater
Installation,
Operation &
Service Manual
CTHN-40
CTHN-60
CTHN-80
CTHN-100
CTHN-125
CTHN-150
CTHN-175
CTHN-200
© 2009 Roberts-Gordon LLC
Roberts-Gordon LLC
1250 William Street
P.O . B o x 44
Buffalo, New York 14240-0044
Telephone: 716.852.4400
Fax: 716.852.0854
Toll Free: 800.828.7450
www.rg-inc.com
www.radiantheaters.com
P/N 152101NA Rev B 04/09
Page 2
Page 3
TABLE OF CONTENTS
© 2009
Roberts-Gordon LLC
All rights reserved. No part of this work covered by the copyrights herein may be reproduced
or copied in any form or by any means - graphic, electronic, or mechanical, including
photocopying, recording, taping or information storage and retrieval systems - without the
written permission of Roberts-Gordon LLC.
SECTION 1: Heater Safety......................................................1
1. 1 M an p o wer Requirements .............................................1
1.2 Safety Labels and Their Placement ............................. 1
SECTION 2: Installer Responsibility .....................................3
2.1 Wall Tag .......................................................................3
2.2 Corrosive Chemicals....................................................3
2.3 National Standards and Applicable Codes ..................3
SECTION 3: Critical Considerations .....................................4
3.1 Required Clearances to Combustibles......................... 4
SECTION 4: National Standards and Applicable Codes ..... 8
4.1 Gas Codes...................................................................8
4.2 Aircraft Hangars ...........................................................8
4.3 Public Garages ............................................................8
4.4 Electrical ......................................................................8
4.5 Venting .........................................................................8
4.6 High Altitude ................................................................8
SECTION 5: Heater Descriptions...........................................9
5.1 Unitary vs. Multiburner.................................................9
SECTION 6: Major Components.......................................... 10
SECTION 7: General Suspension Details ........................... 11
SECTION 8: Unitary Linear & U-Tube Heater Installation.. 13
8.1 Standard Parts...........................................................13
8.2 Unitary Heater Requirements ....................................16
8.3 Unitary Linear Heater Layouts ................................... 17
8.4 Unitary U-tube Heater Layouts ..................................20
8.5 Burner Tube Installation ............................................22
8.6 Tube Clamp Package Installation..............................22
8.7 Coupling and Tube Assembly....................................23
8.8 Turbulator Installation ................................................24
8.9 Reflector Installation ..................................................25
8.10 Burner Installation....................................................27
8.11 Fan Inlet Plate and Warning Tag............................. 27
8.12 Restrictor Plate Installation.....................................28
8.13 Fan Installation ........................................................ 28
SECTION 9: Multiburner Heater Installation....................... 29
9.1 Standard Parts...........................................................29
9.2 Multiburner System Design Requirements ................33
9.3 Burners Per Pump ..................................................... 34
9.4 Radiant Tube Length.................................................. 35
9.5 Manifold Tube ............................................................ 35
9.6 Multiburner System Layouts and Manifold Tube
Length Rules.............................................................. 35
9.7 Burner Tube Installation ............................................40
9.8 Tube Clamp Package Installation..............................40
9.9 Coupling and Tube Assembly....................................41
9.10 Turbulator Installation.............................................. 42
9.11 Reflector Installation................................................ 43
9.12 Burner Installation....................................................45
SECTION 10: Optional Heater Accessories........................ 46
10.1 Elbow Package Configuration ..................................46
10.2 Reflector Side Extension..........................................48
10.3 Lower Clearance Shield Installation.........................49
10.4 Two-Foot Decorative Grille Installation.....................50
10.5 Protective Grille Installation......................................52
SECTION 11: Venting - General............................................ 53
11.1 General Venting Requirements.................................53
SECTION 12: Venting - Unitary Heater ................................54
12.1 Unvented Operation .................................................54
12.2 Unvented Operation Termination ............................. 54
12.3 Horizontal Venting ................................................... 54
12.4 Vertical Venting........................................................ 54
12.5 Length Requirements .............................................. 54
12.6 Flue Connection Detail ............................................ 55
12.7 Horizontal Ventilation 4" (10 cm) Pipe ..................... 55
12.8 Vertical Ventilation 4" (10 cm) Pipe.......................... 56
12.9 Common Side Wall Venting ..................................... 56
12.10 Common Vertical Venting ..................................... 57
SECTION 13: Venting - Multiburner Systems ..................... 58
13.1 General Requirements............................................. 58
13.2 Manifold Tube Requirements ................................... 58
13.3 Venting the Pump .................................................... 58
13.4 EP-100 Pump Models .............................................. 59
13.5 EP-200 Pump Series ............................................... 59
13.6 EP-300 Pump Series ............................................... 59
13.7 Installation Precautions............................................ 59
SECTION 14: Outside Combustion Air Supply .................. 61
14.1 Length Requirements .............................................. 61
14.2 Vertical Non-Pressurized Outside Air Supply for
Single Heater Installation ......................................... 61
14.3 Horizontal Non-Pressurized Outside Air Supply for
Single Heater Installation ......................................... 61
14.4 Vertical Non-Pressurized Outside Air Supply for
Double Heater Installation........................................ 62
14.5 Horizontal Non-Pressurized Outside Air Supply for
Double Heater Installation........................................ 62
14.6 Pressurized Outside Air Supply ............................... 63
SECTION 15: Wiring.............................................................. 64
15.1 Internal Wiring ......................................................... 64
15.2 Internal Wiring ......................................................... 64
15.3 Ladder Diagram....................................................... 65
15.4 External Wiring (Unitary Heaters Only) ................... 65
15.5 Line Voltage Thermostat Wiring
(Unitary Heaters Only) ............................................ 66
15.6 Low Voltage Thermostat Wiring
(Unitary Heaters Only) ............................................ 66
15.7 System Control Methods and External Multiburner
Wiring...................................................................... 67
SECTION 16: Gas Piping.......................................................74
SECTION 17: Operation and Maintenance.......................... 76
17.1 Checking the Gas Line............................................. 76
17.2 Unitary Heater Sequence of Operation................... 76
17.3 Multiburner System Operation.................................. 77
17.4 Maintenance............................................................. 79
17.5 Maintenance Checklist ............................................. 79
SECTION 18: Troubleshooting............................................. 81
18.1 Troubleshooting Flow Chart - Unitary ...................... 82
18.2 Troubleshooting Flow Chart - Multiburner................ 86
18.3 Manifold Gas Pressure Setting ................................ 88
SECTION 19: Replacement Parts List................................. 89
SECTION 20: General Specifications.................................. 92
20.1 Material Specifications............................................. 92
20.2 Heater Specifications............................................... 92
20.3 Suspension Specifications ...................................... 92
20.4 Controls Specifications............................................ 92
SECTION 21: The ROBERTS GORDON
Limited Warranty ........................................... 95
®
VANTAGE® NP
Printed in U.S.A.
Page 4
Page 5
TABLE OF FIGURES
Figure 1: Top and Bottom Panel Label Placement .................... 1
Figure 2: Side and Back Panel Label Placement......................2
Figure 3: Standard Reflector .....................................................4
Figure 4: One Side Reflector.....................................................5
Figure 5: Two Side Reflectors ...................................................5
Figure 6: 45° Tilt Reflector ........................................................5
Figure 7: U-Tube, Standard Reflector........................................ 6
Figure 8: U-Tube, 45°................................................................6
Figure 9: U-Tube, Opposite 45° Reflector .................................6
Figure 10: 2-Foot Deco Grille and Protective Grille................... 7
Figure 11: Lower Clearance Shield ...........................................7
Figure 12: Venting .....................................................................7
Figure 13: Major Component Descriptions.............................. 10
Figure 14: Critical Hanger Placement ..................................... 12
Figure 15: Linear Heater Assembly Overview......................... 17
Figure 16: Unitary Linear Layout Overview............................. 18
Figure 17: Unitary Linear Layout Overview (Continued) ......... 19
Figure 18: U-tube Assembly Overview.................................... 20
Figure 19: Unitary U-tube Layout Overview ............................ 21
Figure 20: Typical CTHN Multiburner System Installation....... 33
Figure 21: Flag Layout ............................................................36
Figure 22: Modified In-Series Layout ......................................36
Figure 23: T Layout................................................................. 37
Figure 24: Fork Layout ............................................................ 38
Figure 25: Herringbone Layout ...............................................39
Figure 26: Reflector Joint Detail ..............................................48
Figure 27: Fan Termination .....................................................54
Figure 28: Tailpipe Connection Points..................................... 58
Figure 29: Roof Venting of Pump ............................................59
Figure 30: Side Wall Venting Configurations........................... 60
Figure 31: General System Control Wiring (Multiburner) ........67
Figure 32: External Wiring Diagram EP-100 and EP-201
120 V 1 Ø Pump (Multiburner) ...............................68
Figure 33: External Wiring Diagram EP-100, EP-201 and
EP-301 230 V 1 Ø Pump (Multiburner) .................. 69
Figure 34: External Wiring Diagram EP-203 or EP-303
208 - 230 V (or 460 V) 3 Ø Pump (Multiburner)..... 70
Figure 35: One Zone Operation without Control Panel
(Multiburner) ..........................................................72
Figure 36: Two Zone Operation without Control Panel
(Multibu
Figure 37: Gas Connection with Flexible Gas Hose ...............75
Figure 38: Vacuum Differential Reading..................................78
rner) ..........................................................73
LIST OF TABLES
Table 1: Contents of CTHN Burner Carton .............................13
Table 2: Contents of Core and Extension Packages ..............14
Table 3: Component Package Guide ......................................14
Table 4: Common CTHN-Series Components........................15
Table 5: Unitary Heater Design Requirements .......................16
Table 6: Contents of CTHN Burner Carton .............................29
Table 7: Contents of Core and Extension Packages ..............30
Table 8: Component Package Guide ......................................30
Table 9: Common CTHN-Series Components........................31
Table 10: Multiburner Design Requirements...........................34
Table 11: Nu mber of Burners Allowed Per Pump ...................34
Page 6
Page 7
SECTION 1: HEATER S AFETY
Logo Label
Rating Plate Label
Bottom
Panel
Top Panel
Gas Connection Label
Description Part Number
Logo Label 91013213
Rating Plate Label 91010401
Gas Connection Label 91018122
SECTION 1: HEATER SAFETY
Yo ur Safety is Important to Us!
This symbol is used throughout
the manual to notify you of
possible fire, electrical or burn
hazards. Please pay special
attention when reading and
following the warnings in these
sections.
Installation, service and annual inspection of heater
must be done by a contractor qualified in the
installation and service of gas-fired heating
equipment.
Read this manual carefully before installation,
operation or service of this equipment.
This heater is designed for heating nonresidential
indoor spaces. Do not install in residential spaces.
These instructions, the layout drawing, local codes
and ordinances, and applicable standards that apply
to gas piping, electrical wiring, venting, etc. must be
thoroughly understood before proceeding with the
installation.
Protective gear is to be worn during installation,
operation and service. Thin sheet metal parts,
including the aluminum reflector and the various
FIGURE 1: Top and Bottom Panel Label Placement
venting components, have sharp edges. To prevent
injury, the use of work
gloves is recommended. The use of gloves will also
prevent the transfer of body oils from the hands to the
surface of the reflector.
Before installation, check that the local distribu
tion
conditions, nature of gas and pressure, and
adjustment of the appliance are compatible.
For additional copies of the Installation, Operation
and Service Manual, please contact Roberts-Gordon
LLC.
1.1 Manpower Requirements
To prevent personal injury and damage to the heater,
two persons will be required for installation.
1.2 Safety Labels and Their Placement
Product safety signs or labels should be replaced by
the product user when they are no longer legible.
Please contact Roberts-Gordon or your ROBERTS
GORDON
®
independent distributor to obtain
replacement signs or labels. See Page 1, Figure 1
through Page 2, Figure 2.
1
Page 8
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Clearances to Combustibles Label
Control Side Panel
Control Side Panel (Inside) Wiring Label
Description Part Number
Clearances to Combustibles Label 91013419
Wiring Label 91015601
Vent Length Label 91039500
Thermostat Connection Label 91037902
Lighting Instruction Plate Label 91029602
Lighting Instruction Plate Label
Thermostat
Connection
Label
Vent Length Label
Back Panel
FIGURE 2: Side and Back Panel Label Placement
2
Page 9
SECTION 2: INSTALLER RESPONSIBILITY
The installer is responsible for the following:
• To install the heater, as well as the gas and
electrical supplies, in accordance with applicable
specifications and codes. Roberts-Gordon
recommends the installer contact a local Building
Inspector or Fire Marshal for guidance.
• To use the information given in a layout drawing
and in the manual together with the cited codes
and regulations to perform the installation.
• To install the heater in accordance with the
clearances to combustibles requirements.
• To furnish all needed materials not furnished as
standard equipment.
• To plan location of supports.
• To provide access to burners on all sides for
burner servicing and removal.
• To provide the owner with a copy of this
Installation, Operation and Service Manual.
• To never use heater as a support for a ladder or
other access equipment and never hang or
suspend anything from heater.
• To ensure there is adequate air circulation around
the heater and to supply air for combustion,
ventilation and distribution in accordance with
local codes.
• To safely and adequately install heater
using
materials with a minimal working load of 75 lbs
(33 kg).
• To ensure the heater is placed in an approved
application.
2.1 Wall Tag
A laminated wall tag is available for the heater as a
permanent reminder of the safety instructions and
the importance of the required clearances to
combustibles. Please contact Roberts-Gordon or
your ROBERTS GORDON
®
independent distributor
to obtain the wall tag. Affix the tag by peeling off the
backing of the adhesive strips on the rear surface
and position the tag on a wall near the heater (e.g.
thermostat or ROBERTS GORDON
®
Controller).
A copy of the wall tag (P/N 91037912) is illustrated on
the back cover. For an immediate solution, you may
affix this copy on the wall near the heater.
Know your model number and installed configuration.
Model number and installed configuration are found
on the burner and in the Installation, Operation and
Service Manual. See Page 4, Figure 3 through Page
7, Figure 12. Write the proper clearance dimensions
in permanent ink according to your model number
and configuration in the open spaces on the tag.
SECTION 2: INSTALLER R ESPONSIBILITY
2.2 Corrosive Chemicals
CAUTION
Product Damage Hazard
Do not use heater in area containing
corrosive chemicals.
Refer to appropriate Material Safety Data
Sheets (MSDS).
Failure to follow these instructions can result
in product damage.
Roberts-Gordon cannot be responsible for ensuring
that all appropriate safety measures are undertaken
prior to installation; this is entirely the responsibility of
the installer. It is essential that the contractor, the
sub-contractor, or the owner identifies the presence
of combustible materials, corrosive chemicals or
halogenated hydrocarbons* anywhere in the
premises.
* Halogenated Hydrocarbons are a family of
chemical compounds characterized by the
presence of halogen elements (fluorine, chlorine,
bromine, etc.). These compounds are frequently
used in refrigerants, cleaning agents, solvents, etc.
If these compounds enter the air supply of the
burner, the life span of the heater components will
be greatly reduced. An outside air supply must be
provided to the burners whenever the presence of
these compounds is suspected. Warranty will be
invalid if the heater is exposed to halogenated
hydrocarbons.
2.3 National Standards and Applicable Codes
All appliances must be installed in accordance with
the latest revision of the applicable standards and
national codes. This refers also to the electric, gas
and venting installation. Note: Additional standards
for installations in public garages, aircraft hangars,
etc. may be applicable.
3
Page 10
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
SECTION 3: CRITICAL CONSIDERATIONS
3.1 Required Clearances to Combustibles
Clearances are the required distances that
combustible objects must be away from the heater to
prevent fire hazards. Combu stible materials that may
catch fire include common items such as wood,
paper, rubber, fabric, etc. Maintain clearances to
combustibles at all times for safety.
Clearances for all heater models are located on the
burner of the heater and on Page 4, Figure 3 through
Page 7, Figure 12 in this manual. Check the
clearances on each burner for the model heater
being installed to make sure the product is suitable
for your application and the clearances are
maintained. Read and follow the safety guidelines
below:
• Keep gasoline or other combustible materials
including flammable objects, liquids, dust or
vapors away from this heater or any other
appliance.
• The stated clearances to combustibles represents
a surface temperature of 90° F (32° C) above
room temperature. Building materials with a low
heat tolerance (such as plastics, vinyl siding,
canvas, tri-ply, etc) may be subject to degradation
at lower temperat
ures. It is the installer’s
responsibility to assure that adjacent materials
are protected from degradation.
• Maintain clearances from heat sensitive material,
equipment and workstations.
• Maintain clearances from vehicles parked below
the heater.
• Maintain clearances from swinging and overhead
doors, overhead cranes, vehicle lifts, partitions,
storage racks, hoists, building construction, etc.
• In locations used for the storage of combustible
materials, signs must be posted to specify the
WARNING
Fire Hazard
Keep all flammable objects, liquids and
vapors the minimum required clearances to
combustibles away from heater.
Some objects will catch fire or explode when
placed close to heater.
Failure to follow these instructions can result
in death, injury or property damage.
maximum permissible stacking height to maintain
required clearances from the heater to the
combustibles. Signs must be posted adjacent to
the heater thermostat. In the absence of a
thermostat, signs must be posted in a
conspicuous location.
• Consult local Fire Marshal, Fire Insurance Carrier
or other authorities for approval of proposed
installation when there is a possibility of exposure
to combustible airborne materials or vapors.
• Hang heater in accordance to the minimum
suspension requirements on Page 12, Figure 14.
• If the radiant tubes must pass through the building
structure, be sure that adequate sleeving and fire
stop is installed to prevent scorching and/or fire
hazard.
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows.
2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream
from where the burner and burner tube connect.
FIGURE 3: STANDARD REFLECTOR
Model A B C D A B C D
CTHN-40 5 20 41 20 13 51 104 51
CTHN-60 5 27 51 27 13 69 130 69
CTHN-80 5 30 58 30 13 76 147 76
CTHN-100 5 32 60 32 13 81 152 81
CTHN-125 5 35 65 35 13 89 165 89
CTHN-150 5 39 71 39 13 99 180 99
CTHN-175 8 44 74 44 20 112 188 112
CTHN-200 8 47 76 47 20 119 193 119
4
(inches) (centimeters)
Page 11
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows.
A
C
D
B
A
C
D
B
2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from
where the burner and burner tube connect.
FIGURE 4: ONE SIDE REFLECTOR
Model A B CDABCD
CTHN-40 5 6 46 35 13 15 117 88
CTHN-60 5 6 55 44 13 15 140 110
CTHN-80 5 6 64 49 13 15 163 123
CTHN-100 5 6 66 51 13 15 168 128
CTHN-125 5 6 69 58 13 15 175 145
CTHN-150 5 6 75 60 13 15 191 150
CTHN-175 8 6 77 68 20 15 196 170
CTHN-200 8 6 79 70 20 15 201 175
FIGURE 5: TWO SIDE REFLECTORS
Model A B CDABCD
CTHN-40 5 16 47 16 13 41 119 41
CTHN-60 5 18 56 18 13 46 142 46
CTHN-80 5 21 65 21 13 53 165 53
CTHN-100 5 23 68 23 13 58 173 58
CTHN-125 5 26 73 26 13 66 185 66
CTHN-150 5 30 76 30 13 76 193 76
CTHN-175 8 32 88 32 20 81 224 81
CTHN-200 8 33 90 33 20 84 229 84
SECTION 3: CRITICAL C ONSIDERATIONS
.
(inches) (centimeters)
(inches) (centimeters)
FIGURE 6: 45° TILT REFLECTOR
(inches) (centimeters)
Model A B CDABCD
CTHN-40 8 4 35 43 20 10 89 109
CTHN-60 8 4 45 45 20 10 114 114
CTHN-80 9 4 54 55 23 10 137 140
CTHN-100 10 4 57 56 25 10 145 142
CTHN-125 10 4 63 58 25 10 160 147
CTHN-150 10 4 66 61 25 10 168 155
CTHN-175 10 4 69 68 25 10 175 173
CTHN-200 10 4 73 71 25 10 185 180
5
Page 12
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
B
C
D
A
A
C
D
B
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows.
2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from
where the burner and burner tube connect.
FIGURE 7: U-TUBE, STANDARD REFLECTOR
Model A B CDABCD
CTHN-40
CTHN-60 5 27 56 19 13 69 142 48
CTHN-80 5 30 61 20 13 76 155 51
CTHN-100 5 32 63 20 13 81 160 51
CTHN-125 5 35 66 20 13 89 168 51
CTHN-150 5 39 73 21 13 99 185 53
CTHN-175 8 44 75 26 20 112 191 66
CTHN-200 8 47 76 30 20 119 193 76
FIGURE 8: U-TUBE, 45°
Model A B CDABCD
CTHN-40
CTHN-60 8 4 47 40 20 10 119 102
CTHN-80 8 4 54 46 20 10 137 117
CTHN-100 8 4 57 48 20 10 145 122
CTHN-125 8 4 63 53 20 10 160 135
CTHN-150 8 4 66 56 20 10 168 142
CTHN-175 8 4 69 59 20 10 175 150
CTHN-200 8 4 73 63 20 10 185 160
(inches) (centimeters)
- UNAPPROVED - - UNAPPROVED -
(inches) (centimeters)
- UNAPPROVED - - UNAPPROVED -
FIGURE 9: U-TUBE, OPPOSITE 45° REFLECTOR
(inches) (centimeters)
Model A B CDABCD
CTHN-40
CTHN-60 8 45 45 10 20 114 114 25
CTHN-80 9 55 54 10 23 140 137 25
CTHN-100 10 56 57 10 25 142 145 25
CTHN-125 10 58 63 10 25 147 160 25
CTHN-150 10 61 66 20 25 155 168 51
CTHN-175 10 68 69 20 25 173 175 51
CTHN-200 10 71 73 20 25 180 185 51
6
- UNAPPROVED - - UNAPPROVED -
Page 13
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows.
A
C
D
B
A
C
D
B
Radiant Tubes
Vent
Pipes
Unvented
Vented
A
E
F
2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from
where the burner and burner tube connect.
FIGURE 10: 2-FOOT DECO GRILLE AND PROTECTIVE GRILLE
(inches) (centimeters)
Model A B CDABCD
CTHN-40 5 20 41 20 13 51 104 51
CTHN-60 5 27 51 27 13 69 130 69
CTHN-80 5 30 58 30 13 76 147 76
CTHN-100 5 32 60 32 13 81 152 81
CTHN-125 5 35 65 35 13 89 165 89
CTHN-150 5 39 71 39 13 99 180 99
CTHN-175 8 44 74 44 20 112 188 112
CTHN-200 8 47 76 47 20 119 193 119
FIGURE 11: LOWER CLEARANCE SHIELD*
(inches) (centimeters)
Model A B CDABCD
CTHN-40 5 25 22 25 13 64 56 64
CTHN-60 5 30 27 30 13 76 69 76
CTHN-80 5 37 37 37 13 94 94 94
CTHN-100 5 39393913999999
CTHN-125 5 41 41 41 13 104 104 104
SECTION 3: CRITICAL C ONSIDERATIONS
CTHN-150 5 43 50 43 13 109 127 109
CTHN-175
CTHN-200
*When installed in the first 10' (3 m).
FIGURE 12: VENTING
CTHN-40 14 18 18 36 46 46
CTHN-60141818364646
CTHN-80 20 24 18 51 61 46
CTHN-100 20 24 18 51 61 46
CTHN-125 20 24 18 51 61 46
CTHN-150 20 30 18 51 76 46
CTHN-175 20 30 18 51 76 46
CTHN-200 20 30 18 51 76 46
- UNAPPROVED - - UNAPPROVED -
- UNAPPROVED - - UNAPPROVED -
(inches) (centimeters)
Model A E F A E F
7
Page 14
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
SECTION 4: NATIONAL STANDARDS AND
APPLICABLE CODES
4.1 Gas Codes
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.
United States: Refer to National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 - latest revision.
4.2 Aircraft Hangars
Installation in aircraft hangars must be in
accordance with the following codes:
United States: Refer to Standard for Aircraft
Hangars, NFPA 409 - latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 - latest revision.
In aircraft storage and servicing areas, heaters
shall be installed at least 10' (3 m) above the
upper surface of wings or of engine enclosures
of the highest aircraft which may be housed in
the hangar. The measurement shall be made
from the wing or engine enclosure (whichever is
higher from the floor) to the bottom of the heater.
• In shops, offices and other sections of aircraft
hangars communicating with aircraft storage or
servicing areas, heaters shall be installed not
less than 8' (2.4 m) above the floor.
• Suspended or elevated heaters shall be so
located in all spaces of aircraft hangars that they
shall not be subject to injury by aircraft, cranes,
movable scaffolding or other objects. Provisions
shall be made to assure accessibility to
suspended heaters for recurrent maintenance
purposes.
4.3 Public Garages
Installation in garages must be in accordance
with the following codes:
United States: Refer to Standard for Parking
Structures NFPA 88A - latest revision or the
Code for Motor Fuel Dispensing Facilities and
Repair Garages, NFPA 30A - latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 - latest revision.
• Heaters must not be installed less than 8'
(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.
4.4 Electrical
The heater must be electrically grounded in
accordance with the following codes:
United States: Refer to National Electrical Code
NFPA 70 - latest revision. Wiring must conform
to the most current National Electrical Code
local ordinances and any special diagrams
furnished.
Canada: Refer to Canadian Electrical Code,
CSA C22.1 Part 1 - latest revision.
4.5 Venting
The venting must be installed in accordance with
the requirements within this manual and the
following codes:
United States: Refer to National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 - latest revision.
®
,
®
,
8
4.6 High Altitude
These heaters are approved for installations up
to 2000' (610 m)(US), 4500' (1370 m)(Canada)
without modification. Consult factory if US
installation is above 2000' (610 m) or Canadian
installation is above 4500' (1370 m).
Page 15
SECTION 5: HEATER DESCRIPTIONS
5.1 Unitary vs. Multiburner
CTHN-Series burners may be used for unitary
heaters or for multiburner systems.
Unitary heaters consist of a single burner, a single
run of radiant tubing and a single fan assembly. See
Page 17, Figure 15 or See Page 20, Figure 18 for
details.
Multiburner systems consist of more than one burner
and more than one run of radiant tubing. The runs of
radiant tubing are connected together by manifold
tubing. The manifold tubing connects to a single
pump that exhausts the flue gases outdoors. See
Page 36, Figure 21 through Page 39, Figure 25 for
common multiburner system layouts.
Since this manual addresses installation of both
unitary heaters and multiburner systems, pay
close attention to section and figure titles to
verify relevance to unitary heaters or multiburner
systems.
SECTION 5: HEATER D ESCRIPTIONS
9
Page 16
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Tube and Reflector Hanger
with Clamp Package
Position this hanger no more
than 4'' (10 cm) away from
the burner.
Coupling Assembly
with Lock
Reflector End Cap
Punch out center section to
accommodate tube.
Tube and Reflector Hanger
Suspend system from these
hangers.
Flex Gas Line
with Shut Off Cock
Burner Tube
Supplied in 10' (3 m) lengths.
Burner tube is always the first
tube after the burner.
Reflector Support
Strap & Wire Form
Turbulator
Turbulator must be installed in the last standard section
of tube.Turbulator is only required on the CTHN-40, 60
and 80. For installation, see Page 24, Step 8.8.
EP-100 Pump Package -
For more information, refer to the
EP-100 Installation, Operation and
Service Manual
(P/N 127201NA).
EP-201 Pump Package -
For more information, refer to the
EP-200 Series Installation,
Operation and Service Manual
(P/N 127200NA).
Fan Assembly
EP-300 Series
Pump Package For more information,
refer to the EP-300
Series Installation,
Operation and
Service Manual
(P/N 127202NA).
Reflector (Aluminum or Stainless Steel)
Alternate overlap as shown on Page 18,
Figure 16 or on Page 21, Figure 19.
Minimum overlap is 6'' (16 cm).
Tube
Hot rolled or heat treated aluminized
tube supplied in 10' (3 m) lengths.
Burner with
Tube Gasket
Must be installed
with the flame
observation window
facing down.
Restrictor Plate
Used at fan assembly inlet
for unitary heaters only.
See fan assembly below.
SECTION 6: MAJOR COMPONENTS
FIGURE 13: Major Component Descriptions
10
Page 17
SECTION 7: GENERAL SUSPENSION DETAILS
WARNING
Severe Injury Hazard
Secure burner to burner tube with bolts and
lockwashers.
Hang heater with materials with a minimum
working load of 75 lbs (33 kg).
Failure to follow these instructions can result
in death, injury or property damage.
WARNING
Cut/Pinch Hazard
Wear protective gear during installation,
operation and service.
Edges are sharp.
Failure to follow these instructions can result
in injury.
SECTION 7: GENERAL SUSPENSION D ETAILS
To ensure your safety and comply with the terms of
the warranty, all units must be installed in
accordance with these instructions.
The gas or the electrical supply lines must not be
used to support the heater.
Do not locate the gas or electric supply lines directly
over the path of the flue products from the heater.
The heater must be installed in a location that is
readily accessible for servicing.
The heaters must be installed in accordance with
clearances to combustibles as indicated on the rating
plate and in this instruction manual.
The minimum and maximum gas inlet pressures
must be maintained as indicated on the rating plate.
Typical installation configurations are shown
on Page 12, Figure 14.
Expansion and contraction of the tube dictates that
the minimum suspension lengths must be
maintained. See table on Page 12, Figure 14.
11
Page 18
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Hanger
Side View
Must Be Within 4" (10 cm) Front View
S-hooks
Reflector
Hanger
45° Angle
* Allows for thermal expansion of system
Typical Suspension Details
Rod 3/8"
Beam Clamp
Concrete Beam
Wood Beam
Washers
Locknut
Screw Hook
3/8"
24" min.*
(61 cm)
X*
Anchor
S-hooks
Chain Size
3/16"
Minimum
Turnbuckle
Not Included
Description Part Number
S-Hook 91907302
Tube/Reflector Hanger 03090100
Run Length Typical Expansion Minimum “X” Length
10' (3 m) - 50' (15 m) ±1" (3 cm) 12" (30 cm)
51' (15.5 m) - 60' (18 m) ±2" (5 cm) 18" (46 cm)
61' (18.6 m) - 80' (24 m) ±3" (8 cm) 24" (61 cm)
FIGURE 14: Critical Hanger Placement
12
Page 19
SECTION 8: UNITARY LINEAR & U-TUBE H EATER INSTALLATION
WARNING
Severe Injury Hazard
Secure burner to burner tube with bolts and
lockwashers.
Hang heater with materials with a minimum
working load of 75 lbs (33 kg).
Failure to follow these instructions can result
in death, injury or property damage.
WARNING
Cut/Pinch Hazard
Wear protective gear during installation,
operation and service.
Edges are sharp.
Failure to follow these instructions can result
in injury.
SECTION 8: UNITARY LINEAR & U-TUBE HEATER INSTALLATION
8.1 Standard Parts
Table 1: Contents of CTHN Burner Carton
Part No. Description CTHN-40 CTHN-60 CTHN-80 CTHN-100 CTHN-125 CTHN-150 CTHN-175 CTHN-200
052XXXXX Burner (Rate and Fuel Varies)
07730400 Restrictor Plate 1.25'' (3.2 cm) dia.
07730100 Restrictor Plate 1.50'' (3.8 cm) dia.
07730500 Restrictor Plate 2.25'' (5.7 cm) dia.
07730600 Restrictor Plate 2.50'' (6.4 cm) dia.
07730700 Restrictor Plate 2.75'' ( 7 cm) dia.
03051503 Turbulator Adapter
03051504 Turbulator Section
03051505 Turbulator Section,
Stainless Steel
*91412200 Flexible Stainless Steel Gas Hose , 1/2'' NPT
(US Models Only)
*91412204 Flexible Stainless Steel Gas Hose , 3/4'' NPT
(US Models Only)
02568200 Gasket (Burner to Burner Tube)
94273914 Hex Head Cap Screw 5/16'' -18 x 7/8''
96411600 Split Lock Washer
91201708 Pipe Nipple 1/2'' NPT x 4''
152101NA Installation, Operation and Service Manual
111 1 1 1 1 1
1-- - - ---
-1- - ----
--- 1 1---
--- - - - 1 -
--- - - 1 - -
111 - ----
244 - ----
1-- - - ---
111 1 1---
--- - - 1 11
111 1 1 1 1 1
444 4 4 4 4 4
444 4 4 4 4 4
111 1 1 1 1 1
111 1 1 1 1 1
*Canadian Models: Rubber (Type 1) Gas Hoses
available as an accessory. See Page 74, Section 16.
13
Page 20
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Table 2: Contents of Core and Extension Packages
Hot Rolled Aluminized Hot Rolled Aluminized
Part No. Description
91409300
Tube, Hot Rolled Steel, 10
'
(3 m)
20
'
(6 m)
123 - - - - 1234 - - - -
Core Packages Extension Packages
30
'
40
'
10
'
20
'
30
'
40
'
10
'
20
'
30
'
40
(9 m)
(12 m)
(3 m)
(6 m)
(9 m)
(12 m)
(3 m)
(6 m)
(9 m)
(12 m)
'
(3 m)
10
'
20
'
30
'
40
(9 m)
'
(12 m)
(6 m)
91409408
03051101
03051601
Tube, HT Aluminized, 10' (3 m)
Burner Tube, ALUMI-THERM® Steel, 10' (3 m)
Burner Tube, HT ALUMI-THERM® Steel, 10' (3 m)
- - - -123 - - - -1234
-11--11--------
1--11----------
01312700 Coupling Assembly 123- 12312341234
02750303
Standard Reflector, 8
'
(2.4 m)
346234623462346
02750800 End Cap 2 2 2 2 2 2 2 - - - - - - - -
03090100 Tube and Reflector Hanger 3 4 5 2 3 4 5 1 2 3 4 1 2 3 4
91907302 S-hook 3 4 5 2 3 4 5 1 2 3 4 1 2 3 4
03050010 Reflector Support Package
235123523462346
(Strap, Wire Form, Screws)
91107720U-clip Package 111111111111111
90502700 Vent Adapter (Not used on CTHN) 1111111--------
013 189 01
Tube Clamp Package
1111111--------
Table 3: Component Package Guide
Model
CTHN-40 10' (3 m) CP10ALUM CP10ALUM
CTHN-60 20' (6 m) CP20HRS CP20ALUM
CTHN-80 20' (6 m) CP20HRS CP20ALUM
CTHN-100 30' (9 m) CP30HRS CP30ALUM
CTHN-125 40' (12 m) CP40HRS CP40ALUM
CTHN-150 40' (12 m) CP40HRS CP40ALUM
CTHN-175 50' (15 m) CP30HRS + EXP20HRS CP30ALUM + EXP20ALUM
CTHN-200 50' (15 m) CP30HRS + EXP20HRS CP30ALUM + EXP20ALUM
Tubing Length Core Packages
Minimum Standard Aluminized
Additional tubing length may be added to heater.
Any additional tubing lengths are considered as vent length for length determination.
Maximum venting length for unitary heater is 45' (13.7 m) total.
For manifold tubing on multiburner systems, heat-treated aluminized or porcelain coated tubing is required.
14
Page 21
Table 4: Common CTHN-Series Components
SECTION 8: UNITARY LINEAR & U-TUBE H EATER INSTALLATION
Part No. Description
Tubing and Related Accessories
01312700 Coupling, 4" (10 cm) Plain
01312706 Coupling, 6" (15 cm) Plain
0131270I Coupling, 4" (10 cm) Lined
01331900 Coupling, 4" (10 cm) Damper
E0009356 Coupling, 6" (15 cm) Damper
0133022D Tee, 4" (10 cm) Coated
01330203 Tee, 4" (10 cm) Aluminized
01330204 Tee, 6" (15 cm) Aluminized
01335801 Elbow, 4" (10 cm) Aluminized 90°
T0100320 Elbow, 6" (15 cm) Aluminized 90°
0133580D Elbow, 4" (10 cm) Coated 90°
01336101 Elbow, 4" (10 cm) Aluminized 45°
0133610D Elbow, 4" (10 cm) Coated 45°
91409300 Tube, 4" (10 cm) dia Hot Rolled Steel 10' (3 m)
91409403 Tube, 4" (10 cm) dia Non-Heat Treated Aluminized
10' (3 m)
91409408 Tube, 4" (10 cm) dia Heat Treated Aluminized
10' (3 m)
91409420 Tube, 6" (15 cm) dia Non-Heat Treated Aluminized
10' (3 m)
9141030D Tube, 4" (10 cm) dia Coated 10' (3 m)
E0009105 Tube, 6" (15 cm) dia 10' (3 m)
Heat Treated Aluminized
91418200 Tube Adapter, 6" (15 cm) dia x 4"(10 cm) dia
Aluminized
Part No. Description
Control Packages and Thermostats
02770002 System Control
05023000 Load Relay Package
90417600 Transformer Relay - SPST (12 A)
90436300 Transformer Relay - DPST (12 A)
90423000 Thermostat, 24 V Low Voltage (Marked 1-5)
90424300 Thermostat Guard
Part No. Description
Deco Grille (2' x 4' [.6 m x 1.2 m])
01365900 Shield Frame
01370408 Reflector Side Extension 8" x 48" (20 cm x 122 cm)
01370412 Reflector Side Extension 12" x 48" (30 cm x 122 cm)
01370416 Reflector Side Extension 16" x 48" (40 cm 122 cm)
91407000 Grille, Aluminum 2' x 4' (.6 m x 1.2 m)
Part No. Description
Protective Grille
08050001 Grille, 40" (102 cm) Protective
08050002 Protective Grille End Cap
Part No. Description
Fan and Pump Packages
05220000-P Fan Package 40-150
05221000-P Fan Package 175-200
Part No. Description
Venting Accessories
01324401 Air Supply Takeoff, 4" (10 cm) Outside
90707501 Air Supply Blower/Power Venter
91409601 Air Flex Duct, 4" (10 cm) Outside
(Box of 8 - 8' (2.4 m) sections)
Part No. Description
Reflectors and Related Accessories
01329910 Reflector Side Extension Support
03050010 Reflector Support Package (Tubing)
02712700 Reflector Side Extension, 2 Clips, 2 Screws
02750303 Reflector, Aluminum
027503SS Reflector, Stainless Steel
02750800 Reflector End Cap, Aluminum
027508SS Reflector End Cap, Stainless Steel
027508SH Reflector End Cap, Stainless Steel with Hole
02750900 Reflector Joint
027509SS Reflector Joint, Stainless Steel
027127SS Reflector Side Extension, Stainless Steel
03090100 Tube and Reflector Hanger
91907302 S-hook
91903201 Turnbuckle
91903300 Spring Hook
91903202 Turnbuckle with Eyebolt
15
Page 22
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
8.2 Unitary Heater Requirements
CTHN unitary heaters are typically shipped as a
burner package, fan assembly and a tube and
accessory package. The tube and accessory
packages contain enough tube, reflector and hanging
parts for one unitary CTHN heater. Elbows, u-tubes,
controls, and any other parts must be purchased
separately.
See Page 17, Figure 15 for a general overview of a
CTHN unitary heater. CTHN unitary heaters are
controlled by thermostat.
Table 5 summarizes the design requirements for a
CTHN unitary heater.
Table 5: Unitary Heater Design Requirements
Burner Model: CTHN-40 CTHN-60 CTHN-80 CTHN-100 CTHN-125 CTHN-150 CTHN-175 CTHN-200
Maximum Number of Burners Allowed
per Fan Assembly (P/N 05220000)
Maximum Number of Burners Allowed
per Fan Assembly (P/N 05221000)
Minimum Radiant Tube Length
Minimum Distance from Burner to Elbow or
U-Tube
111111 - -
------11
10' (3 m) 20' (6 m) 20' (6 m) 30' (9 m) 40' (12 m) 40' (12 m) 50' (15 m) 50' (15 m)
10' (3 m) 10' (3 m) 10' (3 m) 15' (4.5 m) 15' (4.5 m) 20' (6 m) 20' (6 m) 20' (6 m)
16
Page 23
8.3 Unitary Linear Heater Layouts
Tube
Reflector
Reflector End Cap
Reflector Support
Burner
Coupling
U-Clips
Burner Tube
Tube and Reflector Hanger
Tube Clamp
Package
Fan Assembly
Turbulator
(With Select Models)
FIGURE 15: Linear Heater Assembly Overview
SECTION 8: UNITARY LINEAR & U-TUBE H EATER INSTALLATION
17
Page 24
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Fan Assembly
Burner
Reflector
Tube
Tube/Reflector
Hanger
Coupling Assembly
LEGEND
a = 14" (36 cm)
reflector width (not shown)
b = 2" (5 cm)
end cap to burner/fan
c = 2" (5 cm)
end cap to hanger
d = 7'6" (229 cm)
distance first hanger
e = 10' (305 cm)
distance between hangers
f = 9.5" (24 cm)
burner height
g = 17.5" (44 cm)
burner length
c
b
de
b
c
b
de
b
e
c
b
de
b
e e
c
b
de
b
e e e
20' (6 m) Tube Length
30' (9 m) Tube Length
40' (12 m) Tube Length
50' (15 m) Tube Length
g
c
b
d
f
10' (3 m) Tube Length
f
g
f
g
f
g
f
g
FIGURE 16: Unitary Linear Layout Overview
18
Page 25
FIGURE 17: Unitary Linear Layout Overview (Continued)
c
b
de
b
e e e e
c
b
de
b
e e e e e
c
b
de
b
e e e e e e
60' (18 m) Tube Length
70' (21 m) Tube Length
80' (24 m) Tube Length
f
g
f
g
f
g
SECTION 8: UNITARY LINEAR & U-TUBE H EATER INSTALLATION
19
Page 26
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
U-tube
18" (457 mm)
Center to Center
U-clips
Reflector
End Caps
12
12
1
2
U-tube, Full 45°
12
Burner
Reflector
Turbulator
(With Select
Models)
Tube Clamp
Package
Burner
Tube
Tube
U-tube
Support Bracket
Reflector
Support
Couplings
U-tube, Standard
U-tube, Opposite 45°
Nut
Lock Washer
Lock Washer
Nut
U-bolt
Tight U-bolt
4" (10 cm) u-bolt,
secured to burner tube
with 1/4" (6 mm)
lockwashers and
1/4-20 hex nuts.
Loose U-bolt
4" (10 cm) u-bolt,
secured to bracket with
1/4" (6 mm) lockwashers
and 1/4-20 hex nuts on
top and bottom to
allow for tube expansion
and contraction.
8.4 Unitary U-tube Heater Layouts
CTHN-Series heaters (except CTHN-40) are
approved for optional u-tube configurations.
The u-tube may be installed in either a standard
horizontal position, 45° position or in an opposite 45°
position as shown on Page 6, Figure 7 through
Figure 9. When using a u-tube configuration, the
following additional rules must be adhered to:
FIGURE 18: U-tube Assembly Overview
• A minimum of 10' (3 m) on CTHN-60/80, a
minimum of 15' (4.5 m) on CTHN-100/125, and a
minimum of 20' (6 m) on CTHN-150/175/200 is
required between the burner and the u-tube.
• For turbulator installation, See Page 24, Step 8.8.
• The burner must never be operated
in a tilted position.
The heater must be properly supported at all
locations. See Page 12, Figure 14.
20
Page 27
c
b
d
f
c
b
de
c
b
de
f
c
b
de
e
c
b
de
e
f
LEGEND
a = 14" (36 cm)
reflector width (not shown)
b = 2" (5 cm)
end cap to burner
c = 2" (5 cm)
end cap to hanger
d = 7'6" (229 cm)
distance first hanger
e = 10' (305 cm)
distance between hangers
f = 5' (153 cm)
distance between last full tube
hanger and half tube hanger
g = 17.5" (44 cm) burner length
h = 9.5" (24 cm) burner height
*20' (6 m) & 50' (15 m) tube length
heaters require the last reflector
before the u-tube to be cut in
half for use on both sides.
U-tube
Burner
Reflector
Tube
Tube/Reflector
Hanger
Coupling Assembly
Fan Assembly
(not shown)
c
b
de
e e
c
b
e
g
h
g
h
g
h
g
h
g
h
g
h
g
h
20' (6 m)*
Tube Length
30' (9 m)
Tube Length
40' (12 m)
Tube Length
50' (15 m)*
Tube Length
60' (18 m)
Tube Length
70' (21 m)
Tube Length
80' (24 m)
Tube Length
FIGURE 19: Unitary U-tube Layout Overview
SECTION 8: UNITARY LINEAR & U-TUBE H EATER INSTALLATION
21
Page 28
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
7' 6" ± 1'
(229 cm ± 25 cm)
NOTE:
Tubing requires a downward
slope of 1/2" (1.3 cm)
per 20
' (6 m) away
from burner.
S-hook
Burner Tube
Hanger
Offset mounting
hole must be
to the top.
Weld seam
must be to the
bottom of the tube.
Description Part Number
Burner Tube 03051XXX
S-hook 91907302
Tube/Reflector Hanger 03090100
Bolt
Tube Clamp
Flat
Washer
Nut
(Torque 120 in/lb
13.56 Nm)
Description Part Number
Tube C la m p Package 01318901
Tube Clamp 01396801
Bolt 97113940
Flat Washer 95211600
Nut 92113900
Step 8.5 Burner Tube Installation
Step 8.6 Tube Clamp Package Installation
22
Page 29
Step 8.7 Coupling and Tube Assembly
Tube
Tube
Orient coupling so that
the impact block is in the
2:00 or 10:00 oclock
positions.
Closed
Open
Tab
3" (8 cm) to
4" (10 cm)
Slide Bar/Coupling Lock
Coupling
Wide End
Coupling
Tube
Slide Bar/Coupling Lock
A
Close coupling
with tab.
B
Start slide bar/coupling lock
onto coupling.
C
Insert tubes into coupling.
D
Tighten coupling to join tubes.
Description Part Number
Coupling 01329600
Slide Bar/Coupling Lock 01329700
Tube 91409XXX
Incorrect slide bar
position
Correct slide bar
dimensions
± 2" (5 cm)
Drive slide bar until tight.
End of slide bar should be
within tolerance listed below.
• Repeat Step 8.7, A - D until all tubes are assembled. See Page 24, Step 8.7.2.
NOTE: If coupling is not tight, loss of vacuum can occur.
Tighten slide bar as shown below.
SECTION 8: UNITARY LINEAR & U-TUBE H EATER INSTALLATION
Step 8.7.1 Coupling and Tube Assembly (Continued)
23
Page 30
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
10' ± 1'
(3 m ± .25 m)
Total Overall
Tube Length
7' 6" ± 1'
(2.3 m ± .25 m)
Model
Radiant
Tube Length
CTHN-40 10' (3 m)
CTHN-60 20' (6 m)
CTHN-80 20' (6 m)
CTHN-100 30' (9 m)
CTHN-125 40' (12 m)
CTHN-150 40' (12 m)
CTHN-175 50' (18 m)
CTHN-200 50' (18 m)
T
w
i
s
t
Pull String
Ta b
Fold tab around outside
of tube nearest to the vent to
hold turbulator in place.
Turbulator
Section
Turbulator
Adapter
Description Part Number
Turbulator Adapter 03051503
Turbulator Section 03051504
Turbulator Section (Stainless) 03051505
Tube 91409XXX
Turbulator must be installed in the last
standard section of radiant tube.
Turbulator is only required on the
CTHN-40, CTHN-60 and CTHN-80.
Turbulator Installation
Model Tube Section
CTHN-40 1st 10' (3 m) Section
CTHN-60 2nd 10' (3 m) Section
CTHN-80 2nd 10' (3 m) Section
CTHN-100 N/A
CTHN-125 N/A
CTHN-150 N/A
CTHN-175 N/A
CTHN-200 N/A
Turbulator section
(stainless) used in
CTHN-40 heaters must be in the
section of tube nearest to the burner.
Step 8.7.2 Coupling and Tube Assembly (Continued)
Step 8.8 Turbulator Installation
24
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