Roberts Gorden CTHN-125, CTHN-150, CTHN-175, CTHN-40, CTHN-80 User Manual
...
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. Leave the building.
6. Immediately call your local gas
supplier after leaving the building.
Follow the gas suppliers
instructions.
7. If you cannot reach your gas
supplier, call the Fire Department.
®
Vantage
NP
Negative Pressure
Unitary or Multiburner
WARNING
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 will catch fire or explode
when placed close to heater.
Failure to follow these instructions can
result in death, injury or property
damage.
Infrared Heater
Installation,
Operation &
Service Manual
CTHN-40
CTHN-60
CTHN-80
CTHN-100
CTHN-125
CTHN-150
CTHN-175
CTHN-200
WARNING
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.
Installation must be done by a contractor qualified
in the installation and service of gas-fired heating
equipment or your gas supplier.
Quality in Any Language™
© Copyright 2006 Roberts-Gordon, LLC
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.
Roberts-Gordon, LLC
1250 William Street
P.O . B o x 4 4
Buffalo, New York 14240-0044
Telephone: 716.852.4400
Fax: 716.852.0854
Toll Free: 800.828.7450
www.rg-inc.com
P/N 152101NA Rev A 10/06
TABLE OF CONTENTS
SECTION 1: Heater Safety......................................................1
1.1 Manpower Requirements ............................................. 1
SECTION 2: Installer Responsibility .....................................2
2.1 Wall Tag .......................................................................2
2.2 Corrosive Chemicals....................................................2
2.3 National Standards and Applicable Codes .................. 2
SECTION 3: Critical Considerations......................................3
3.1 Required Clearances to Combustibles.........................3
SECTION 4: National Standards and Applicable Codes .....7
4.1 Gas Codes...................................................................7
4.2 Aircraft Hangars ...........................................................7
4.3 Public Garages ............................................................7
4.4 Electrical ......................................................................7
4.5 Venting.........................................................................7
4.6 High Altitude ................................................................7
SECTION 5: Heater Descriptions...........................................8
5.1 Unitary vs. Multiburner.................................................8
SECTION 6: Major Components ............................................ 9
SECTION 7: General Suspension Details ........................... 10
SECTION 8: Unitary Linear & U-Tube Heater Installation.. 11
8.1 Standard Parts........................................................... 11
8.2 Unitary Heater Requirements .................................... 13
8.3 Unitary Linear Heater Layouts................................... 14
8.4 Unitary U-tube Heater Layouts ..................................17
8.5 Burner Tube Installation ............................................19
8.6 Tube Clamp Package Installation ..............................19
8.7 Coupling and Tube Assembly....................................20
8.8 Turbulator Installation ................................................ 21
8.9 Reflector Installation ..................................................22
8.10 Burner Installation....................................................24
8.11 Fan Inlet Plate and Warning Tag.............................24
8.12 Restrictor Plate Installation.....................................25
8.13 Fan Installation ........................................................25
SECTION 9: Multiburner Heater Installation....................... 26
9.1 Standard Parts...........................................................26
9.2 Multiburner System Design Requirements ................29
9.3 Burners Per Pump .....................................................30
9.4 Radiant Tube Length..................................................31
9.5 Manifold Tube ............................................................31
9.6 Multiburner System Layouts and Manifold Tube
Length Rules..............................................................31
9.7 Burner Tube Installation ............................................36
9.8 Tube Clamp Package Installation ..............................36
9.9 Coupling and Tube Assembly....................................37
9.10 Turbulator Installation .............................................. 38
9.11 Reflector Installation ................................................39
9.12 Burner Installation....................................................41
SECTION 10: Optional Heater Accessories........................42
10.1 Elbow Package Configuration ..................................42
10.2 Reflector Side Extension..........................................44
10.3 Lower Clearance Shield Installation.........................45
10.4 Two-Foot Decorative Grille Installation..................... 45
10.5 One-Foot Decorative Grille Installation .................... 47
10.6 Protective Grille Installation......................................49
SECTION 11: Venting - General............................................50
11.1 General Venting Requirements.................................50
SECTION 12: Venting - Unitary Heater ................................51
12.1 Unvented Operation.................................................51
12.2 Unvented Operation Termination ............................. 51
12.3 Horizontal Venting.................................................... 51
12.4 Vertical Venting........................................................ 51
12.5 Length Requirements .............................................. 51
12.6 Flue Connection Detail ............................................ 52
12.7 Horizontal Ventilation 4" (10 cm) Pipe...................... 52
12.8 Vertical Ventilation 4" (10 cm) Pipe.......................... 53
12.9 Common Sidewall Venting ....................................... 53
12.10 Common Vertical Venting ..................................... 54
SECTION 13: Venting - Multiburner Systems..................... 55
13.1 General Requirements............................................. 55
13.2 Manifold Tube Requirements ................................... 55
13.3 Venting the Pump .................................................... 55
13.4 EP-100 Pump Models .............................................. 56
13.5 EP-200 Pump Series ............................................... 56
13.6 EP-300 Pump Series ............................................... 56
13.7 Installation Precautions............................................ 56
SECTION 14: Outside Combustion Air Supply .................. 58
14.1 Length Requirements .............................................. 58
14.2 Vertical Non-Pressurized Outside Air Supply for
Single Heater Installation ......................................... 58
14.3 Horizontal Non-Pressurized Outside Air Supply for
Single Heater Installation ......................................... 58
14.4 Vertical Non-Pressurized Outside Air Supply for
Double Heater Installation........................................ 59
14.5 Horizontal Non-Pressurized Outside Air Supply for
Double Heater Installation........................................ 59
14.6 Pressurized Outside Air Supply ............................... 60
SECTION 15: Wiring.............................................................. 61
15.1 Internal Wiring.......................................................... 61
15.2 Internal Wiring.......................................................... 61
15.3 Ladder Diagram....................................................... 62
15.4 External Wiring (Unitary Heaters Only).................... 62
15.5 Line Voltage Thermostat Wiring
(Unitary Heaters Only) ............................................. 63
15.6 Low Voltage Thermostat Wiring
(Unitary Heaters Only) ............................................. 63
15.7 System Control Methods and External Multiburner
Wiring....................................................................... 64
SECTION 16: Gas Piping...................................................... 69
SECTION 17: Operation and Maintenance.......................... 70
17.1 Checking the Gas Line............................................. 70
17.2 Unitary Heater Sequence of Operation ................... 70
17.3 Multiburner System Operation.................................. 70
17.4 Maintenance............................................................. 73
17.5 Maintenance Checklist ..............................................74
SECTION 18: Troubleshooting............................................. 76
18.1 Troubleshooting Flow Chart - Unitary ...................... 76
18.2 Troubleshooting Flow Chart - Multiburner................ 78
18.3 Manifold Gas Pressure Setting ................................ 80
SECTION 19: Replacement Parts List................................. 81
SECTION 20: General Specifications.................................. 83
20.1 Material Specification .............................................. 83
20.2 Heater Specifications............................................... 83
20.3 Suspension Specifications....................................... 83
20.4 Controls Specifications ............................................ 83
SECTION 21: The ROBERTS GORDON
Warranty.......................................................... 85
®
Vantage® NP Limited
© 2006
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.
Roberts-Gordon, LLC
Prin ted in U.S.A.
TABLE OF FIGURES
Figure 1: Standard Reflector .....................................................3
Figure 2: One Side Reflector.....................................................4
Figure 3: Two Side Reflectors ...................................................4
Figure 4: 45° Tilt Reflector ........................................................4
Figure 5: U-Tube, Standard Reflector........................................5
Figure 6: U-Tube, 45°................................................................5
Figure 7: U-Tube, Opposite 45° Reflector .................................5
Figure 8: 2-Foot Deco Grille, 1-Foot Deco Grille and
Protective Grille ..........................................................6
Figure 9: Lower Clearance Shield.............................................6
Figure 10: Venting .....................................................................6
Figure 11: Major Component Descriptions ................................ 9
Figure 12: Critical Hanger Placement ..................................... 10
Figure 13: Linear Heater Assembly Overview......................... 14
Figure 14: Unitary Linear Layout Overviews ........................... 15
Figure 15: Unitary Linear Layout Overviews (Continued) ....... 16
Figure 16: U-tube Assembly Overview....................................17
Figure 17: Unitary U-Tube Layout Overviews.......................... 18
Figure 18: Typical CTHN Multiburner System Installation ....... 29
Figure 19: Flag Layout ............................................................32
Figure 20: Modified In-Series Layout ......................................32
Figure 21: T Layout................................................................. 33
Figure 22: Fork Layout............................................................34
Figure 23: Herringbone Layout................................................ 35
Figure 24: Reflector Joint Detail..............................................43
Figure 25: Fan Termination .....................................................51
Figure 26: Tailpipe Connection Points..................................... 55
Figure 27: Roof Venting of Pump ............................................56
Figure 28: Side Wall Venting Configurations...........................57
Figure 29: General System Control Wiring (Multiburner) ........ 64
Figure 30: External Wiring Diagram EP-100 and
EP-201 120 V 1 Ø Pump (Multiburner) .................. 65
Figure 31: External Wiring Diagram EP-301 230 V 1 Ø Pump
(Multiburner) ..........................................................65
Figure 32: External Wiring Diagram EP-203 or
EP-303 3 Ø Pump (Multiburner) ............................66
Figure 33: One Zone Operation without Control Panel
(Multiburner) ..........................................................67
Figure 34: Two Zone Operation without Control Panel
(Multiburner) ..........................................................68
Figure 35: Gas Connection with Flexible Gas Hose ............... 69
Figure 36: Vacuum Differential Reading..................................72
SECTION 1: HEATER SAFETY
Your 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.
SECTION 1: HEATER S AFETY
Thin sheet metal parts, including the aluminum
reflector and the various 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 distribution
conditions, nature of gas and pressure, and
adjustment of the appliance are compatible.
1.1 Manpower Requirements
To prevent personal injury and damage to the heater,
two persons will be required for installation.
1
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
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).
and configuration in the open spaces on the tag.
2.2 Corrosive Chemicals
CAUTION
Do not use heater in an area containing corrosive
chemicals.
Avoid the use of corrosive chemicals to ensure a
longer life of the burner, tubing and other parts.
Failure to follow these instructions can result in
property 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.
2.1 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 3, Figure 1 through Page
6, Figure 10. Write the proper clearance dimensions
in permanent ink according to your model number
2
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.
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. Combustible 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 3, Figure 1 through
Page 6, Figure 10 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.
• 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
maximum permissible stacking height to maintain
SECTION 3: CRITIC AL C ONSIDERATIONS
WARNING
Fire Hazard
Some objects will catch fire or explode when placed
close to heater.
Keep all flammable objects, liquids and vapors the
required clearances to combustibles away from heater.
Failure to follow these instructions can result in death,
injury or property damage.
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 10, Figure 12.
• 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 1: STANDARD REFLECTOR
Model A B C D A B C D
CTHN-40 5 20 41 20 13 51 104 51
CTHN-60 5 275127136913069
CTHN-80 5 30 58 30 13 76 147 76
CTHN-100 5 326032138115281
CTHN-125 5 35 65 35 13 89 165 89
CTHN-150 5 397139139918099
CTHN-175 8 44 74 44 20 112 188 112
CTHN-200 8 47 76 47 20 119 193 119
(inches) (centimeters)
3
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
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 2: ONE SIDE REFLECTOR
Model ABCDABCD
A
B
C
D
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
.
(inches) (centimeters)
FIGURE 3: TWO SIDE REFLECTORS
Model ABCDABCD
A
B
C
D
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
FIGURE 4: 45° TILT REFLECTOR
Model ABCDABCD
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
(inches) (centimeters)
(inches) (centimeters)
4
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 5: U-TUBE, STANDARD REFLECTOR
Model ABCDABCD
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
SECTION 3: CRITIC AL C ONSIDERATIONS
(inches) (centimeters)
- UNAPPROVED - - UNAPPROVED -
FIGURE 6: U-TUBE, 45°
Model ABCDABCD
A
B
D
C
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
FIGURE 7: U-TUBE, OPPOSITE 45° REFLECTOR
Model ABCDABCD
A
B
C
D
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
(inches) (centimeters)
- UNAPPROVED - - UNAPPROVED -
(inches) (centimeters)
- UNAPPROVED - - UNAPPROVED -
5
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
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 8: 2-FOOT DECO GRILLE, 1-FOOT DECO GRILLE AND PROTECTIVE GRILLE
(inches) (centimeters)
Model ABCDABCD
A
C
B
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
FIGURE 9: LOWER CLEARANCE SHIELD*
Model ABCDABCD
A
B
C
D
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
CTHN-150 5 43 50 43 13 109 127 109
CTHN-175
CTHN-200
*When installed in the first 10' (3 m).
FIGURE 10: VENTING
Model A E F A E F
CTHN-40 14 18 18 36 46 46
CTHN-60 14 18 18 36 46 46
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
Unvented
Radiant Tubes
Vented
A
E
Vent
Pipes
F
(inches) (centimeters)
- UNAPPROVED - - UNAPPROVED -
- UNAPPROVED - - UNAPPROVED -
(inches) (centimeters)
6
SECTION 4: NATIONAL STANDARDS AND
APPLICABLE CODES
SECTION 4: NATIONAL STANDARDS AND APPLICABLE C ODES
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,
ANSI Z223.1 - latest revision (same as NFPA
54).
Canada: Refer to CAN/CGA B149.1 and B149.2:
Installation Codes for Gas Burning Appliances.
4.2 Aircraft Hangars
Installation in aircraft hangars must be in
accordance with the following codes:
United States: Refer to Standard for Aircraft
Hangars, ANSI/NFPA-409 - latest revision.
Canada: Refer to Standard CAN/CGA B149.1
and B149.2: Installation Codes for Gas Burning
Appliances.
• 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: 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
CAN/CGA B149.1 and B149.2: Installation
Codes for Gas Burning Appliances.
• 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
, ANSI/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 NFPA-54/ANSI Z223.1 latest revision, National Fuel Gas Code.
Canada: Refer to CAN/CGA B149.1 and B149.2:
Installation Codes for Gas Burning Appliances.
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).
7
CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
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 14, Figure 13 or See Page 17, Figure 16 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 32, Figure 19 through Page 35, Figure 23 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.
8
SECTION 6: MAJOR COMPONENTS
FIGURE 11: Major Component Descriptions
Burner with
Tube Gasket
Must be installed
with the flame
observation window
facing down.
Reflector (Aluminum or Stainless Steel)
Alternate overlap as shown on Page 15,
Figure 14 or on Page 18, Figure 17.
Minimum overlap is 6'' (16 cm).
SECTION 6: MAJOR COMPONENTS
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 21, Step 8.8.
Flex Gas Line
with Shut Off Cock
Tube and Reflector Hanger
with Clamp Package
Position this hanger no more
than 4'' (10 cm) away from
the burner assembly.
Tube and Reflector Hanger
Suspend system from these
hangers.
Burner Tube
Supplied in 10' (3 m) lengths.
Burner tube is always the first
tube after the burner.
Tube
Hot rolled or heat treated aluminized
tube supplied in 10' (3 m) lengths.
Coupling Assembly
with Lock
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).
Reflector Support
Strap & Wire Form
Reflector End Cap
Punch out center section to
accommodate tube.
Restrictor Plate
Used at fan assembly inlet
for unitary heaters only.
See fan assembly below.
Fan Assembly
EP-300 Series
Pump Package For more information,
refer to the EP-300
Series Installation,
Operation and
Service Manual
(P/N 127202NA).
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