Page 1
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.
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
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.
®
Vantage
II
Gas-Fired, Low Intensity
Unitary Heater
Installation, Operation &
Service Manual
CTH2-40
CTH2-60
CTH2-80
CTH2-100
CTH2-125
CTH2-150
CTH2-175
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
© 2012 Roberts-Gordon LLC
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: +1.716.852.4400
Fax: +1.716.852.0854
Toll Free: 800.828.7450
www.rg-inc.com
www.radiantheaters.com
P/N 130100NA Rev. M 02/12
Page 2
Page 3
© 2012
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.
TABLE OF CONTENTS
SECTION 1: Heater Safety...................................................... 1
1.1 Manpower Requirements .............................................1
1.2 Safety Labels and Their Placement ............................. 1
1.3 California Proposition 65 ..............................................1
SECTION 2: Installer Responsibility .....................................4
2.1 Wall Tag....................................................................... 4
2.2 Corrosive Chemicals.................................................... 4
2.3 National Standards and Applicable Codes .................. 4
SECTION 3: Clearances to Combustibles............................. 5
3.1 Required Clearances to Combustibles.........................5
SECTION 4: National Standards and Applicable Codes .....9
4.1 Gas Codes................................................................... 9
4.2 Aircraft Hangars ...........................................................9
4.3 Public Garages ............................................................9
4.4 Electrical ...................................................................... 9
4.5 Venting.........................................................................9
4.6 High Altitude ................................................................ 9
SECTION 5: Major Components ..........................................10
5.1 Standard Parts List .................................................... 11
SECTION 6: Heater Installation............................................ 13
6.1 Burner Tube Installation ............................................ 18
6.2 Tube Clamp Package Installation.............................. 18
6.3 Coupling and Tube Assembly....................................19
6.4 Turbulator Installation ................................................ 20
6.5 Reflector Installation ..................................................21
6.6 Burner Installation...................................................... 23
SECTION 7: Optional Heater Accessories..........................24
7. 1 U - Tube Configuration.................................................. 24
7.2 Elbow Package Configuration.....................................28
7.3 Reflector Side Extension ............................................30
7. 4 L o wer Clearance Shield Installation ........................... 31
7. 5 Two-Foot Decorative Grille Installation .......................31
7.6 Protective Grille Installation ........................................ 33
SECTION 8: Venting.............................................................. 34
8.1 General Venting Requirements..................................34
8.2 Unvented Operation...................................................34
8.3 Horizontal Venting......................................................35
8.4 Vertical Venting..........................................................35
8.5 Unvented Operation T
8.6 Length Requirements ................................................35
8.7 Horizontal Ventilation 4" (10 cm) Pipe........................35
8.8 Vertical Ventilation 4" (10 cm) Pipe ............................36
8.9 Common Sidewall Venting......................................... 36
8.10 Common Vertical Venting ........................................37
8.11 Outside Combustion Air Supply ...............................38
ube Termination ...................... 35
SECTION 9: Gas Piping........................................................ 40
SECTION 10: Wiring.............................................................. 42
10.1 Line Voltage Thermostat Wiring............................... 42
10.2 Low Voltage Thermostat with One Burner............... 42
10.3 Low Voltage Thermostat Wiring with Multiple Burners.
43
10.4 Internal Wiring.......................................................... 43
10.5 Ladder Diagram ....................................................... 44
10.6 Electrical Connection to the Burner ......................... 44
SECTION 11: Operation and Maintenance.......................... 45
11.1 S e q uence of Operation ............................................ 45
11.2 To Shut Off Heater.................................................... 45
11.3 To Start Heater ......................................................... 45
11.4 Pre-Season Maintenance and Annual Inspection..... 45
11.5 Maintenance Checklist ............................................. 46
SECTION 12: Troubleshooting............................................. 48
12.1 Honeywell SmartValve
12.2 Troubleshooting Flow Chart..................................... 50
12.3 Manifold Gas Pressure Setting ................................ 52
SECTION 13: Replacement Parts ........................................ 53
SECTION 14: General Specifications .................................. 56
14.1 Material Specifications............................................. 56
14.2 Heater Specifications............................................... 56
14.3 Suspension Specifications....................................... 56
14.4 Controls Specifications ............................................ 56
SECTION 15: The ROBERTS GORDON
Warranty ......................................................... 57
®
II Troubleshooting.............. 49
®
VANTAGE® II
Prin ted in U.S.A.
Page 4
Page 5
TABLE OF FIGURES
Figure 1: Top and Bottom Panel Label Placement ....................2
Figure 2: Side and Back Panel Label Placement...................... 3
Figure 3: Standard Reflector .....................................................5
Figure 4: One Side Reflector.....................................................6
Figure 5: Two Side Reflectors ...................................................6
Figure 6: 45° Tilt Reflector ........................................................ 6
Figure 7: U-Tube, Standard Reflector........................................7
Figure 8: U-Tube, 45° ................................................................7
Figure 9: U-Tube, Opposite 45° Reflector .................................7
Figure 10: 2-Foot Deco Grille and Protective Grille ...................8
Figure 11: Lower Clearance Shield*..........................................8
Figure 12: Venting .....................................................................8
Figure 13: Major Component Descriptions.............................. 10
Figure 14: Critical Hanger Placement ..................................... 14
Figure 15: Linear Heater Assembly Overview ........................ 15
Figure 16: Linear Heater Layout Overview.............................. 16
Figure 17: Linear Heater Layout Overview (Continued) .......... 17
Figure 18: U-Tube Heater Assembly O
Figure 19: U-Tube Heater Layout Overview ............................26
Figure 20: U-Tube Heater Layout Overview (Continued) ........ 27
Figure 21: Reflector Joint Detail .............................................. 29
Figure 22: Tube Termination ...................................................35
Figure 23: Gas Connection with Flexible Gas Hose ...............41
verview ...................... 25
LIST OF TABLES
Table 1: Contents of the Burner Carton.................................. 11
Table 2: Contents of Core and Extension Packages .............. 11
Table 3: Component Package Guide......................................12
Page 6
Page 7
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, includ-
ing the aluminum reflector portion of the heater and
the various venting components, ha
ve sharp edges.
To p r e vent 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.
SECTION 1: HEATER S AFETY
1.1 Manpower Requirements
To p r e
vent 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 2, Figure 1
through Page 3, Figure 2.
1.3 California Proposition 65
In accordance with California Proposition 65 require-
ments, a warning label must be placed in a highly
visible location on the outside of the equipment (i.e.,
near equipment’s serial plate). See label placement
drawing on Page 2, Figure 1 for label location. Avoid
placing label on areas with extreme heat, cold, corrosive chemicals or other elements. To order additional
labels, please contact Roberts-Gordon LLC or your
®
ROBERTS GORDON
independent distributor.
Before installation, check that the local distribution
conditions, nature of gas and pressure, and adjust-
ment of the appliance are compatible.
This heater must be applied and operated under the
general concepts of reasonable use and installed
using best building practices.
This appliance is not intended for use by persons
(including children) with reduced physical, sensory or
mental capabilities, or lack of experience and
knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a
person responsible for their safety. Children should
be supervised to ensure that they do no play with the
appliance.
For additional copies of the Installation, Operation
and Service Manual, please contact Roberts-Gordon
LLC.
1
Page 8
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Logo Label
Rating Plate Label
Bottom
Panel
Top Panel
Gas Connection Label
Proposition 65 Label
Description Part Number
Logo Label 91013200
Rating Plate Label 91010401
Gas Connection Label 91018122
Proposition 65 Label 91070015
FIGURE 1: Top and Bottom Panel Label Placement
2
Page 9
FIGURE 2: Side and Back Panel Label Placement
Description Part Number
Clearances to Combustibles Label 91013415
Wiring Label 91013300
Low Voltage Connection Label 91039700
Vent Length Label 91039500
Lighting Instruction Plate Label 91029602
Lighting Instruction Plate Label
Thermostat
Connection
Label
Vent Length Label
Back Panel
Control Side Panel
SECTION 1: HEATER S AFETY
Clearances to Combustibles Label
Control Side Panel (Inside) Wiring Label
3
Page 10
CTH2-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.
• To furnish all needed materials not furnished as
standard equipment.
• To plan location of supports.
• To provide access to burners for servicing on all
sides for burner removal.
• To provide the owner with a copy of this installation, operation and service manual.
• To never use heater as support for a ladder or
other access equipment and never hang or sus-
pend anything from heater.
•To ensure there is adequate air circulation around
the heater and to supply air for combu
stion, 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 a 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 5, Figure 3 through Page
8, Figure 12. Write the proper clearance dimensions
in permanent ink according to your model number
and configuration in the open spaces on the tag.
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.
4
Page 11
SECTION 3: CLEARANCES TO COMBUSTIBLES
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.
3.1 Required Clearances to Combustibles
Clearances are the required distances that combusti-
ble objects must be away from the heater to prevent
serious fire hazards. Combustibles are materials that
may catch on fire and include common items such as
wood, paper, rubber, fabric, etc. Maintain clear-
ances to combustibles at all times for safety.
Clearances for all heater models are located on the
burner of the heater and on Page 5, Figure 3 through
Page 8, Figure 12 in this manual. Check the clear-
ances 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 appli-
ance.
• The stated clearances to combustibles represents
a surface temperature of 90° F (50°C) above room
temperature. Building materials with a low heat tol-
erance (such as plastics, vinyl siding, canvas, triply, etc) may be subject to degradation at lower
temperatures. It is the installer’s responsibility to
assure that adjacent materials are protected from
degradation.
• Maintain clearances from heat sensitive
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.
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.
SECTION 3: CLEARANCES TO COMBUSTIBLES
• In locations used for the storage of combustible
materials, signs must be posted to specify the
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 sus-
pension requirements
• 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.
on Page 14, Figure 14
.
FIGURE 3: STANDARD REFLECTOR
Model ABCDABCD
CTH2-40 6 27 53 27 16 69 135 69
CTH2-60 6 35 63 35 16 89 161 89
CTH2-80 6 38 66 38 16 97 168 97
CTH2-100 6 40 71 40 16 102 181 102
CTH2-125 6 46 77 46 16 117 196 117
CTH2-150 6 50 80 50 16 127 204 127
CTH2-175 8 52 82 52 21 133 209 133
(inches) (centimeters)
5
Page 12
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
A
C
D
B
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 4: ONE SIDE REFLECTOR
Model ABCDABCD
CTH2-40 6 9 53 44 16 23 135 112
CTH2-60 6 9 63 47 16 23 161 120
CTH2-80 6 9 70 54 16 23 178 138
CTH2-100 6 9 77 59 16 23 196 150
CTH2-125 6 9 83 65 16 23 211 166
CTH2-150 6 9 86 69 16 23 219 176
CTH2-175 8 9 88 73 21 23 224 186
FIGURE 5: TWO SIDE REFLECTORS
Model ABCDABCD
CTH2-40 6 15 53 15 16 39 135 39
CTH2-60 6 23 66 23 16 59 168 59
CTH2-80 6 25 72 25 16 64 183 64
CTH2-100 6 27 78 27 16 69 199 69
CTH2-125 6 32 84 32 16 82 214 82
CTH2-150 6 35 88 35 16 89 224 89
CTH2-175 8 40 91 40 21 102 232 102
(inches) (centimeters)
(inches) (centimeters)
FIGURE 6: 45° TILT REFLECTOR
(inches) (centimeters)
Model ABCDABCD
CTH2-40 8 8 51 46 21 21 130 117
CTH2-60 8 8 60 54 21 21 153 138
CTH2-80 8 8 66 60 21 21 168 153
CTH2-100 10 8 74 64 26 21 188 163
CTH2-125 10 8 78 69 26 21 199 176
CTH2-150 12 8 84 74 31 21 214 188
CTH2-175 12 8 85 79 31 21 216 201
6
Page 13
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows.
A
C
D
B
B
C
D
A
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 7: U-TUBE, STANDARD REFLECTOR
Model ABCDABCD
CTH2-40
CTH2-60 6 35 63 30 16 89 161 77
CTH2-80 6 38 69 37 16 97 176 94
CTH2-100 6 40 76 39 16 102 194 100
CTH2-125 6 46 79 43 16 117 201 110
CTH2-150 6 50 84 47 16 127 214 120
CTH2-175 8 54 87 51 21 138 221 130
FIGURE 8: U-TUBE, 45°
Model ABCDABCD
SECTION 3: CLEARANCES TO COMBUSTIBLES
(inches) (centimeters)
- UNAPPROVED -
- UNAPPROVED -
(inches) (centimeters)
CTH2-40
- UNAPPROVED - - UNAPPROVED -
CTH2-60 8 8 60 42 21 21 153 107
CTH2-80 8 8 66 46 21 21 168 117
CTH2-100 8 8 74 52 21 21 188 133
CTH2-125 8 8 78 61 21 21 199 155
CTH2-150 8 8 84 66 21 21 214 168
CTH2-175 8 8 85 70 21 21 216 178
FIGURE 9: U-TUBE, OPPOSITE 45° REFLECTOR
(inches) (centimeters)
Model ABCDABCD
CTH2-40
CTH2-60 8 54 60 22 21 138 153 56
CTH2-80 8 60 66 22 21 153 168 56
CTH2-100 10 64 74 22 26 163 188 56
CTH2-125 10 70 78 22 26 178 199 56
CTH2-150 12 74 84 22 31 188 214 56
CTH2-175 12 76 85 22 31 194 216 56
- UNAPPROVED - - UNAPPROVED -
7
Page 14
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
A
C
D
B
A
C
D
B
Radiant Tubes
Vent
Pipes
Unvented
Vented
A
E
F
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 10: 2-FOOT DECO GRILLE AND PROTECTIVE GRILLE
(inches) (centimeters)
Model ABCDABCD
CTH2-40 6 27 53 27 16 69 135 69
CTH2-60 6 35 63 35 16 89 161 89
CTH2-80 6 38 66 38 16 97 168 97
CTH2-100 6 40 71 40 16 102 181 102
CTH2-125 6 46 77 46 16 117 196 117
CTH2-150 6 50 80 50 16 127 204 127
CTH2-175 8 52 82 52 21 133 209 133
FIGURE 11: LOWER CLEARANCE SHIELD*
(inches) (centimeters)
Model ABCDABCD
CTH2-40 6 34 27 34 16 87 69 87
CTH2-60 6 39 33 39 16 100 84 100
CTH2-80 6 40 38 40 16 102 97 102
CTH2-100 6 50 44 50 16 127 112 127
CTH2-125 6 54 48 54 16 138 122 138
CTH2-150 6 55 50 55 16 140 127 140
*When installed in the first 10' (3 m).
FIGURE 12: VENTING
CTH2-175
- UNAPPROVED - - UNAPPROVED -
(inches) (centimeters)
Model A E F A E F
CTH2-40 14 18 18 36 46 46
CTH2-60141818364646
CTH2-80 20 24 18 51 61 46
CTH2-100 20 24 18 51 61 46
CTH2-125 20 24 18 51 61 46
CTH2-150 20 30 18 51 77 46
CTH2-175 20 30 18 51 77 46
8
Page 15
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
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.
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).
9
Page 16
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Burner with Tube Gasket
Must be installed with the
flame observation
window facing down.
Reflector
(Aluminum or
Stainless
Steel)
Alternate overlap as
shown on overview and
on Page 16, Figure 16.
Minimum overlap is 6" (16 cm).
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
Tube
Hot rolled or heat
treated aluminized tube
supplied in 10' (3 m) lengths.
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 not required on the
CTH2-125/150/175. For
installation see Page 20,
Section 6.4.
Vent Adapter
SECTION 5: MAJOR COMPONENTS
FIGURE 13: Major Component Descriptions
10
Page 17
SECTION 5: MAJOR COMPONENTS
5.1 Standard Parts List Table 1: Contents of the Burner Carton
Part No. Description CTH2-40 CTH2-60 CTH2-80 CTH2-100 CTH2-125 CTH2-150 CTH2-175
030XXXXX Burner Assembly (Rate and Fuel Varies) 1 1 1 1 1 1 1
02568200 Gasket (Burner to Burner Tube) 1 1 1 1 1 1 1
130100NA Installation, Operation and Service Manual 1 1 1 1 1 1 1
94273914 Hex Head Bolts 5/16-18 Rolok 4 4 4 4 4 4 4
96411600 Split Lock washer 4 4 4 4 4 4 4
91201708 Pipe Nipple (Black) 1/2” NPT x 4” 1 1 1 1 1 1 1
91317300 1/4" Quick Disconnect (Wire) 2 2 2 2 2 2 2
*91412200 Flexible Stainless Steel Gas Hose - 1/2" NPT (US Models Only) 1 1 1 1 1
*91412204 Flexible Stainless Steel Gas Hose - 3/4" NPT (US Models Only) - - - - - 1 1
03051503 Turbulator Adapter 1 1 1 1 - - -
03051504 Turbulator Aluminized Steel 2 4 4 2 - - -
03051505 Turbulator Stainless Steel 1 - - - - - -
*Canadian Models: Rubber (Type 1) Gas Hoses available as an accessory.
See Page 40, Section 9
.
Table 2: Contents of Core and Extension Packages
Core Packages Extension Packages
Hot Rolled Aluminized Hot Rolled Aluminized
Part No. Description
91409300
91409408
03051101
03051601
Tube, Hot Rolled Steel, 10
'
(3 m)
Tube, HT Aluminized, 10' (3 m)
Burner Tube, ALUMI-THERM® Steel, 10' (3 m)
Burner Tube, HT ALUMI-THERM® Steel, 10' (3 m)
01312700 Coupling Assembly 1 2 3 - 1 2 3 1 2 3 4 1 2 3 4
02750303
Standard Reflector, 8
'
(3.5 m)
02750800 End Cap 2 2 2 2 2 2 2 - - - - - - - -
03090100Tube and Reflector Hanger 345234512341234
91907302S-Hook 345234512341234
03050010 Reflector Support Package (Strap, Wire Form, Screws) 2 3 5 1 2 3 5 2 3 4 6 2 3 4 6
91107720 U-Clip Package 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
90502700 Vent Adapter 1 1 1 1 1 1 1 - - - - - - - -
01318901 Tube Clamp Package 1 1 1 1 1 1 1 - - - - - - - -
Part Number
'
30
'
40
'
10
'
20
'
30
'
40
'
10
'
20
'
30
'
40
'
10
'
20
'
30
'
20
(6m)
(9m)
(12m)
(3m)
(6m)
(9m)
(12m)
(3m)
(6m)
(9m)
(12m)
(3m)
(6m)
(9m)
40
(12m)
123- - - -1234- - - -
----123----1234
-11--11--------
1--11----------
346234623462346
'
CP20HRS
CP30HRS
CP40HRS
CP10ALUM
CP20ALUM
CP30ALUM
EXP10HRS
CP40ALUM
EXP20HRS
EXP30HRS
EXP40HRS
EXP10ALUM
EXP20ALUM
EXP30ALUM
11
EXP40ALUM
Page 18
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Table 3: Component Package Guide
Tubing Length Core Packages
Model
Minimum Standard Aluminized
CTH2-40 10’ (3m) - CP10ALUM
CTH2-60 20’ (6m) CP20HRS CP20ALUM
CTH2-80 20’ (6m) CP20HRS CP20ALUM
CTH2-100 30’ (9m) CP30HRS CP30ALUM
CTH2-125 40’ (12m) CP40HRS CP40ALUM
CTH2-150 50’ (15m) CP30HRS + EXP20HRS CP30ALUM + EXP20ALUM
CTH2-175 60’ (18m) CP30HRS + EXP30HRS CP30ALUM + EXP30ALUM
Additional tubing length may be added to heater. Tubing must be heat-treated, aluminized or porcelain
coated. Any additional tubing lengths are considered as vent length for length determination. Maximum
venting length for minimum heater length is 45' (13.7 m) total.
12
Page 19
SECTION 6: HEATER I NSTALLATION
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 6: HEATER INSTALLATION
Typical installation configurations are shown in
Figure 14.
Expansion and contraction of the tube dictates that
the minimum suspension lengths in the table on
Page 14, Figure 14 be maintained.
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.
13
Page 20
CTH2-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" (305 mm)
51' (15 m) - 60' (18 m) ±2" (5 cm) 18" (457 mm)
61' (18 m) - 70' (24 m) ±3" (8 cm) 24" (609 mm)
FIGURE 14: Critical Hanger Placement
14
Page 21
FIGURE 15: Linear Heater Assembly Overview
Tube
Reflector
Reflector End Cap
Reflector Support
Burner
Coupling
U-Clips
Burner Tube
Tube and Reflector Hanger
Tube Clamp
Package
Vent Adapter
Turbulator
(With Select Models)
SECTION 6: HEATER I NSTALLATION
15
Page 22
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
g
c
b
d
f
g
c
b
de
f
g
c
b
de
e
f
g
c
b
de
e e
f
Burner
Reflector
Tube
Tube/Reflector
Hanger
Coupling
Assembly
Vent Adapter
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 = 9.5" (24 cm)
burner height
g = 17.5" (44 cm)
burner length
10' Tube Length
20' Tube Length
30' Tube Length
40' Tube Length
FIGURE 16: Linear Heater Layout Overview
16
Page 23
FIGURE 17: Linear Heater Layout Overview (Continued)
g
c
b
de
e e e
f
50' Tube Length
g
c
b
de
e e e e
f
60' Tube Length
b
f
g
c
de
e e e e e
70' Tube Length
b
b
f
g
c
de
e e e e e
80' Tube Length
b
e
SECTION 6: HEATER I NSTALLATION
17
Page 24
CTH2-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 Clamp Package01318901
Tube Clamp 01396801
Bolt 97113940
Flat Washer 95211600
Nut 92113900
Step 6.1 Burner Tube Installation
Step 6.2 Tube Clamp Package Installation
18
Page 25
Step 6.3 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 6.3 A - D until all tubes are assembled. See Page 20, Section 6.3.2.
Tighten slide bar as shown below.
SECTION 6: HEATER I NSTALLATION
Step 6.3.1 Coupling and Tube Assembly (Continued)
19
Page 26
CTH2-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 Tube Length Minimum
CTH2-40 10' (3 m)
CTH2-60 20' (6 m)
CTH2-80 20' (6 m)
CTH2-100 30' (9 m)
CTH2-125 40' 12 m)
CTH2-150 50' (15 m)
CTH2-175 60' (18 m)
T
w
i
s
t
Pull String
Tab
Fold tab around outside
of tube nearest to the vent to hold turbulator
in place. Where a vent sleeve
is used, do not fold tab.
Turbulator
Section
Turbulator
Adapter
Turbulator Section
(stainless) used in CTH2-40
heaters must be in the section of
tube nearest to the burner.
Description Part Number
Turbulator Adapter 03051503
Turbulator Section 03051504
Turbulator Section (stainless) 03051505
Tube 91409XXX
Turbulator Installation
Model Tube Section
CTH2-40 1st 10' Section
CTH2-60 2nd 10' Section
CTH2-80 2nd 10' Section
CTH2-100 3rd 10' Section
CTH2-125 N/A
CTH2-150 N/A
CTH2-175 N/A
Turbulator must be installed in
the last standard section of
tube. Turbulator is not required
on the CTH2-125/150/175.
Step 6.3.2 Coupling and Tube Assembly (Continued)
Step 6.4 Turbulator Installation
20
Page 27
Step 6.5 Reflector Installation
WARNING
Fire Hazard
Support reflector with reflector hanger
and support strap.
Reflector must not touch tube.
Failure to follow these instructions can result
in death, injury or property damage.
Hanger
Burner Tube
Reflector
Description Part Number
Tube/Reflector Hanger 03090100
Burner Tube 03051XXX
Reflector 02750303
NOTE: All tube surfaces must be covered
by a reflector, except for a U-Tube.
SECTION 6: HEATER I NSTALLATION
21
Page 28
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
2. The overlap at the first and second reflector is a slip overlap.
Thereafter, every third reflector joint is a slip overlap. A slip
overlap is achieved by either:
a.) both reflectors lay inside a hanger.
(No reflector support needed.)
b.) using a reflector support with
loose screws at the reflector
overlap.
3. The remaining reflector overlaps require a non-slip
overlap connection. To affix the reflectors together in
a non-slip overlap either:
a.) use reflector support and tight screws.
b.) if both reflectors lay inside a hanger, u-clips or
sheet metal screws may be used.
This section of three reflectors joined together must
be affixed to the tube with at least one reflector support
with tight screws.
Reflector
End Cap
U-clips
1. The first reflector after the burner must be affixed in
the middle of the reflector with a reflector support and
tight screws.
First Reflector
6"
(16 cm)
Overlap must be a
minimum of
6
" (16 cm).
Loose screws
loosened 1/16"
(.16 cm) to allow
slippage.
2 A
Slip Overlap
Reflector
Support
2 B
Slip Overlap
Reflector
Tight
Screws
3 B
Non-Slip Overlap
U-clip
(2 Clips per
Non-slip Overlap
Inside a Hanger)
Reflector
3 A
Non-Slip Overlap
Wire Form
Reflector Support
Strap
Tight
Sheet Metal
Screw
Description Part Number
Reflector Support Package 03050010
Wire Form 91908004
Reflector Support Strap 03050000
Screw #8 x 3/4 94320812
U-Clip Package 91107720
Reflector End Cap 027508XX
Step 6.5.1 Reflector, U-Clip and Reflector Support Installation
The pictorial drawings of the heater construction in
Section 6 are schematic only and provide a general
guideline of where hangers, reflector supports and
U-clips are to be installed.
To ensure proper expansion and contraction move-
ment of the reflectors, a combination of U-clips and
reflector supports are used. The positioning of reflec-
tor supports and U-clips depends on the individual
installation. Use either pop rivets or sheet metal
screws instead of u-clips when installing end caps
and joint pieces in areas where impact and high wind
may be a factor. The following rules must be
observed.
22
Page 29
Step 6.6 Burner Installation
Lock
Washer
Gasket
Burner
Bolt
(Torque 120 in/lb
13.56 Nm)
S-hook
Burner Tube
Burner must be installed
with the flame observation
window facing down.
Description Part Number
Bolt 94273914
Burner 030XXXXX
Lock Washer 96411600
Gasket 02568200
SECTION 6: HEATER I NSTALLATION
23
Page 30
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
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: OPTIONAL HEATER ACCESSORIES
7.1 U-Tube Configuration
Heaters (except CTH2-40) are approved for optional
U-Tube configurations.
The U-Tube may be installed in either a standard hor-
izontal position, a 45° position or in an opposite 45°
position as shown on Page 7, Figure 7 through Figure
9. When using a U-Tube configuration, the following
additional rules must be adhered to:
• A minimum of 10' (3 m) on CTH2-60/80 and a minimum of 15' (4.5 m) on CTH2-100/125/150/175 is
required between the burner and the U-Tube.
• The correct turbulator (
must be installed in the last standard section of
tube.
• The burner must never be operated in a tilted position.
• The heater must be properly supported at all locations.
See Page 26, Figure 19
See Page 20, Figure 6.4
.
)
24
Page 31
FIGURE 18: U-Tube Heater Assembly Overview
SECTION 7: OPTIONAL H EATER ACCES SORIES
25
Page 32
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
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
*Requires the last reflector
before the U-Tube to be cut
in half for use on both sides.
**Requires the last tube before
the U-Tube to be cut in half for
use on both sides.
U-Tube
Burner
Reflector
Tube 10'
Tube/Reflector
Hanger
Coupling
Assembly
c
b
de
g
h
40' Tube Length
c
b
d
f
g
h
30' Tube Length
g
c
b
20' Tube Length*
h
e
Tube 5' **
**
FIGURE 19: U-Tube Heater Layout Overview
26
Page 33
FIGURE 20: U-Tube Heater Layout Overview (Continued)
c
b
de
e
f
g
h
70' Tube Length**
c
b
de
e
g
h
60' Tube Length
c
b
de
f
g
h
50' Tube Length* **
c
b
de
e
g
h
80' Tube Length
e
SECTION 7: OPTIONAL H EATER ACCES SORIES
27
Page 34
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Tube
90° Elbow
Coupling
Description Part Number
Elbow Package 02718702
90° Elbow 01335801
Coupling 01312700
Reflector End Cap 02750800
Reflector Joint Piece 02750900
U-Clip Package 91107720
Minimum Distance Required Between
Burner and Elbow
Model Minimum Distance
CTH2-40 CTH2-60 10' (3 m)
CTH2-80 10' (3 m)
CTH2-100 15' (4.5 m)
CTH2-125 15' (4.5 m)
CTH2-150 15' (4.5 m)
CTH2-175 15' (4.5 m)
Tube
Coupling
7. 2 E l b o w P a c k a ge Configuration
Step 7.2.1 Elbow Installation
Step 7.2.2 Elbow Installation
Step 7.2.3 Reflector Joint Installation
28
Page 35
Step 7.2.4 Reflector Joint Installation
Step 7.2.5 Reflector Joint Detail
SECTION 7: OPTIONAL H EATER ACCES SORIES
FIGURE 21: Reflector Joint Detail
29
Page 36
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Reflector Side
Extension Bracket
(2 per Reflector)
Use additional supports
in high air movement
applications.
Tube and Reflector Hanger
ReflectorTube
Reflector Support
Description Part Number
Reflector Side Extension Package 02712700
Reflector Side Extension 01368000
Retainer Clips 02751200
Sheet Metal Screws 94118106
Order Separately
Reflector Side Extension 01329910
Retainer Clip
(2 per Side)
Cut relief notches for
supports and hangers.
Reflector Side Extension
#8 x 3/8 (3.9 x 9.5 mm) Sheet Metal Screw
7.3 Reflector Side Extension
Step 7.3.1 Bracket Installation
Step 7.3.2 Side Reflector Installation
30
Page 37
7.4 Lower Clearance Shield Installation
12"
(30 cm)
Reflector
Lower Clearance Shield
17"
(43 cm)
Washers
Screws
Locknuts
Align Pilot Holes
Description Part Number
Lower Clearance Shield Package 01397501
Shield Support Strap 01397500
Lower Clearance Shield 8' 02793000
Locknut #8 92311400
Flat Washer #8 95310800
Screw #8 x 3/8" 93511406
Description Part Number
Aluminum Grille 2' x 4' (.6m x 1.2 m) 91407000
Step 7.4.1 Shield Support Strap Assembly
SECTION 7: OPTIONAL H EATER ACCES SORIES
7.5 Two-Foot Decorative Grille Installation Step 7.5.1 Grille Installation
31
Page 38
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Description Part Number
Deco Grille Shield 01365900
Distance "A" Extension
Minimum Maximum Part No. Width
2" (4 cm) 6" (15 cm) 01370408 8" (20 cm)
6" (15 cm) 10" (26 cm) 01370412 12" (30 cm)
10" (26 cm) 14" (37 cm ) 01370416 16" (40 cm)
Description Part Number
Reflector Side Extension 01370412
Step 7.5.2 Frame Shield Installation
Step 7.5.3 Reflector Side Extension Installation for Decorative Grilles
32
Page 39
7.6 Protective Grille Installation
Silicone Cap
Grille
Finger
Description Part Number
Grille Section 08050001
Grille End Cap 08050002
Silicone Cap 91915951-6P
Bend up 90°.
Pull outward.
Grille
Grille End Cap
A
B
C
D
Grille
Grille
End Cap
Reflector
Final Grille
Section
40"
(101 cm)
Step 7.6.1 Silicone Cap Installation
Step 7.6.2 Grille End Cap Installation
SECTION 7: OPTIONAL H EATER ACCES SORIES
Step 7.6.3 Grille Installation
33
Page 40
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
WARNING
Carbon Monoxide Hazard
Heaters installed unvented must be interlocked
with sufficient building exhaust.
Heaters must be installed according to the
installation manual.
Failure to follow these instructions can result
in death or injury.
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: VENTING
Vent pipe must be sloped downward away from the
burner 1/2'' (1 cm) for every 20' (6 m).
The heater may be individually vented or common
vented. When venting horizontally, a maximum of two
heaters can be commonly vented. See Page 36,
Section 8.9. When venting vertically, a maximum of
four heaters can be commonly vented. See Page 37,
Section 8.10.
The heater may also be installed unvented in certain
circumstances according to bu
codes. Refer to the above codes and Page 34,
Section 8.2 for further information. Unvented
operation also requires compliance with the
clearances to combustibles given on Page 8, Figure
12.
The bottom of the vent or air intake terminal shall not
be located less than 1' (.3 m) above grade level.
The vent shall not terminate less than 7' (2.1 m)
above grade where located adjacent to public
walkways.
Vent terminal must be installed at a height sufficient
to prevent blockage by snow and building materials
protected from degradation by flue gasses.
ilding ventilation
8.1 General Venting Requirements
This heater must be vented in accordance with the
rules contained in this manual and with the following
national codes and any state, provincial or local
codes which may apply:
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.
Exhaust end of heater will accept a 4
pipe using the vent adapter (P/N 90502700). To
prevent leakage of condensation, install the vent
adapter with the seam on top and seal the joint using
a high temperature silicone sealant.
Any portion of vent pipe passing through a
combustible wall must have an approved thimble
to conform with the above listed codes.
34
' (10 cm) vent
Secure all joints with #8 x 3/8 sheet metal screws.
Seal all joints with high temperature silicone sealant.
Vent terminal must be beyond any combustible
overhang.
8.1.1 United States Requirements
Vent must terminate at least 3' (.9 m) above any
forced air inlet located within 10' (3.1 m).
Vent must terminate at least 4' (1.2 m) below, 4'
(1.2 m) horizontally from, or 1' (.3 m) abo
operable window, or gravity air inlet into any building.
8.1.2 Canadian Requirements
The vent shall not terminate within 6' (1.8 m) of a
mechanical air supply inlet to any building.
The vent shall not terminate within 3' (.9 m) of a
window or door that can be opened in any building,
any non-mechanical air supply inlet to any building,
or of the combustion air inlet of any other appliance.
8.2 Unvented Operation
Sufficient ventilation must be provided in the amount
of 4 cfm per 1000 Btu/h firing rate (United States); 3
cfm per 1000 Btu/h firing rate (Canada).
Use of optional outside combustion air is not
recommended with unvented heaters.
If exhaust fans are used to supply ventilation air, an
interlock switch must be used to prevent the heater
from coming on when the fans are off. This may be
done using a pressure s
witch.
ve any door,
Page 41
SECTION 8: VENTING
4" (10 cm)
Single Wall Pipe
Vent Adapter
Vent Terminal
Combustible or
Non-Combustible Wall
Vent Adapter
18" (46 cm)
Min.
Vent Terminal
4" (10 cm) Single Wall Pipe
Non-Combustible Wall Only
SIDE VIEW
Description Part Number
Vent Terminal (Comb. Wall) 90502100
Vent Terminal 02537801-XX
8.3 Horizontal Venting
In noncombustible walls only, vent terminal
(P/N 02537801-1P) may be used.
For 4'' (10 cm) vents in either combustible or
noncombustible walls, use Tjernlund VH1-4 (P/N
90502100) or equivalent insulated vent terminal.
Follow the manufacturer's instructions for proper
installation.
For 6'' (15 cm) common vents in either combustible
or noncombustible walls, use Tjernlund VH1-6 (P/N
90502101) or equivalent insulated vent terminal.
Follow the manufacturer's instructions for proper
installation.
8.4 Vertical Venting
For 4'' (10 cm), an approved vent cap
(P/N 90502300) must be used.
For 6'' (15 cm) common vent, an approved vent cap
(P/N 90502302) m
ust be used.
For common vertical venting of more than two
heaters, See Page 37, Section 8.10.
A vent shall not extend less than 2' (.6m) above the
highest point where it passes through a flat roof of a
building.
FIGURE 22: Tube Termination
8.6 Length Requirements
The maximum vent length allowed is 45' (13.7 m).
The maximum outside air supply duct length allowed
is 45' (13.7 m).
The total vent length, plus outside air duct length,
plus any extensions to minimum heat exchanger
lengths, cannot exceed 65' (19.8 m).
Vent length should be limited to less than 20' (6 m). If
using vent lengths greater than 20' (6 m),
condensation will form in the vent pipe. Insu
lation
and additional sealing measures (high temperature
silicone at all seams) are required. Optional heat
exchanger beyond minimum lengths is considered as
vent length for length determination.
8.5 Unvented Operation Tube Termination
Turndown type vent terminal with a screen must be
installed at the exhaust end of the tube. Vent terminal
design shall not incorporate backdraft flap.
8.7 Horizontal Ventilation 4" (10 cm) Pipe
Subtract 15' (4.6 m) of maximum allowed vent or duct
length per vent elbow if more than two are used.
35
Page 42
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Description Part Number
Vent Cap 4" (10 cm) 90502300
4" (10 cm) Single Wall Pipe
Outside Wall
Vent Adapter
Sweeping 'T'
Connection
Sweeping 'Y'
Connection
Outside Wall
6" (15 cm) Single Wall Pipe
Vent Terminal
Tjernlund VH1-6 or Equivalent
Outside Wall
4" (10 cm) Single Wall Pipe
Vent Adapter
Vent Terminal
Tjernlund VH1-6 or Equivalent
Vent Adapter
Vent Adapter
TOP VIEW
4" (10 cm) Single Wall Pipe
6" (15 cm) Single Wall Pipe
Description Part Number
Vent Terminal 6" (15 cm) 90502101
8.8 Vertical Ventilation 4" (10 cm) Pipe
Step 8.9 Common Sidewall Venting
Requirements:
• Maximum of two heaters can be commonly
vented through a side wall.
• Heaters must be of the same BTU output.
• Heaters must be controlled by a common
thermostat.
36
Page 43
8.10 Common Vertical Venting
SECTION 8: VENTING
Requirements:
• Maximum of four heaters can be commonly vented
through the roof.
• Heaters must be of the same BTU output.
• Heaters must be controlled by a common
thermostat.
• Connections to a common stack must be positioned to avoid direct opposition between streams
of combustion gases.
37
Page 44
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Description Part Number
Vent Cap 4" (10 cm) 90502300
Description Part Number
Vent Cap 4" (10 cm) 90502300
Band Clamp
(Recommended)
Flex Hose
(Recommended)
Vent Cap
Wall
4" (10 cm)
Single Wall Pipe
Burner
8.11 Outside Combustion Air Supply
IMPORTANT: If the building has a slight negative
pressure or corrosive contaminants, such as halogenated hydrocarbons, are present in the air, an outside
combustion air supply to the heater is required. Seal
all combustion air pipe joints.
Use of optional outside combustion air is not recom-
mended with unvented heaters.
The air supply duct may have to be insulated to pre-
vent condensation on the outer surface. The outside
air terminal must not be more than 1' (31 cm) above
the vent terminal.
8.11.1 Length Requirements
Follow the constraints listed on Page 35, Section 8.6.
8.11.2 Vertical Outside Air Supply for Single Heater Installation
8.11.3 Horizontal Outside Air Supply for Single Heater Installation
38
Page 45
8.11.4 Vertical Outside Air Supply for Double Heater Installation
Sweeping 'T'
Connection
6" (15 cm) Single Wall Pipe
Vent Cap
4" (10 cm)
Single Wall Pipe
Band Clamp
(Recommended)
BurnerBurner
Flex Hose
(Recommended)
Flex Hose
(Recommended)
Roof
Description Part Number
Vent Cap 6" (15 cm) 90502302
Sweeping 'Y'
Connection
Vent Cap
Outside Wall
4" (10 cm) Single Wall Pipe
(Seal All Joints)
6" (15 cm) Single Wall Pipe
Flex Hose
(Recommended)
Band Clamp
(Recommended)
Burner
Burner
Description Part Number
Vent Cap 6" (15 cm) 90502302
SECTION 8: VENTING
Requirements:
• Heaters must be controlled by a common thermostat.
8.11.5 Horizontal Outside Air Supply for Double Heater Installation
Requirements:
• Heaters must be controlled by a common thermostat.
39
Page 46
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
WARNING
Explosion Hazard
Leak test all components of gas piping
before operation.
Gas can leak if piping is not installed
properly.
Do not high pressure test gas piping with
heater connected.
Failure to follow these instructions can result
in death, injury or property damage.
SECTION 9: GAS PIPING
WARNING
Fire Hazard
Tighten gas hose fittings to connect gas
supply according to Figure 23.
Gas hose can crack when twisted.
Gas hose moves during normal operation.
Use only 36" (91 cm) long connector of 1/2" or
3/4" nominal ID.
Connector supplied with heater for U.S.
models (not with Canadian models).
Failure to follow these instructions can result
in death, injury or property damage.
There is an expansion of the tube with each firing
cycle. This will cause the burner to move with respect
to the gas line. This can cause a gas leak resulting in
an unsafe condition if the gas connection is not made
in strict accordance with Figure 23.
Meter and service must be large enough to handle all
the burners being installed plus any other connected
load. The gas line which feeds the system must be
large enough to supply the required gas with a maximum pressure drop of 1/2" wc When gas piping is not
included in the layout drawing, the local gas supplier
will us
ually help in planning the gas piping.
Gas lines must meet applicable codes:
United States: The Flexible Stainless Steel Gas
Hose (US models) supplied with the heater is certified per the Standard for Connectors for Gas Appliances, ANSI Z21.24/CSA 6.10 - latest revision.
Canada: The Rubber Type 1 Gas Hose (Canadian
models) optional with the heater is certified as being
in compliance with the Standard for Elastomeric
Composite Hose and Hose Couplings for Conducting
Propane and Natural Gas, CAN/CGA 8.1 - Latest
revision.
• Check the pipe and tubing ends for leaks
before placing heating equipment into service. When checking for gas leaks, use a soap
and water solution; never use an open flame.
Install the gas hose as shown in Figure 23. The gas
hose accommodates expansion of the heating
system and allows for easy installation and service of
the burner. Before connecting the burners to the
supply system, verify that all high pressure testing of
the gas piping has been completed.
40
Page 47
FIGURE 23: Gas Connection with Flexible Gas Hose
Shut-Off Valve (included with gas hose) must
be parallel to burner gas inlet. The 3" (8 cm)
displacement shown is for the cold condition.
This displacement may reduce when the
system is fired.
CORRECT POSITIONS
Horizontal
45°
End View
Vertical
(as shown left)
Alternate
positions
okay
Flexible Gas Hose
36" (91 cm) length
3" (8 cm)
max. displacement
Side View
Heater Movement
12"
(30 cm)
CAUTION
Product Damage Hazard
Hold gas nipple securely with pipe wrench
when attaching gas hose.
Failure to follow these instructions can result
in product damage.
INCORRECT POSITIONS (WRONG INSTALLATION)
Heater Movement
Heater Movement
Heater Movement Heater Movement
Description Part Number
1/2" Flexible Stainless Steel Gas Hose (US Models) 91412200
3/4" Flexible Stainless Steel Gas Hose (US Models) 91412204
1/2" Rubber Type 1 Gas Hose (Canadian Models) 91412206
3/4" Rubber Type 1 Gas Hose (Canadian Models) 91412207
SECTION 9: GAS P IPING
41
Page 48
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
SECTION 10: WIRING
DANGER
Electrical Shock Hazard
Disconnect electric before service.
Heater must be properly grounded.
Failure to follow these instructions can result
in death or electrical shock.
Heaters can be controlled using several methods.
Normally thermostats are used to control the heaters
but they can also be controlled by an Energy
10.1 Line Voltage Thermostat Wiring
Management System. Section 10.1 below illustrates
the connection for heaters controlled by a line voltage
thermostat. NOTE: In order to use line voltage thermostats, the low voltage terminal located at the back
of each burner must be connected as shown in the
detail. For a single heater on a low voltage thermostat, See Section 10.2 below. To control multiple
heaters on one low voltage thermostat, See Page 43,
Section 10.3. NOTE: In order to control multiple heat-
ers on one low voltage thermostat, the low voltage
terminals on each heater must be connected as
shown in detail. Heater must be grounded in accor-
dance with applicable codes: United States: refer to
National Electrical Code
®
NFPA 70 - latest revision
Canada: refer to Canadian Electrical Code, CSA
C22.1 Part I - latest revision.If any of the original
internal wiring must be replaced, it must be replaced
with wiring materials having a temperature rating of at
least 105° C and 600 V.
Line Voltage
Thermostat
120 V-60 Hz
Supply Circuit
L1
L2
Gnd.
T
10.2 Low Voltage Thermostat with One Burner
120
V-60 Hz
Supply Circuit
L1
L2
Gnd.
H N H N
H N
Gnd. Gnd.
T
Gnd.
Low Voltage
Thermostat
Low Voltage
Terminal Detail
On All Burners
Low Voltage
Terminal Detail
42
Page 49
10.3 Low Voltage Thermostat Wiring with Multiple Burners
NH
Gnd.
NH
Gnd.
L1
L2
Gnd.
120V-60 Hz
supply circuit
Low Voltage Thermostat
RC
W
G
Y
1
2
3
4
5
6
COIL COIL
Black
Black
White Red
Transformer Relay
FRONT VIEW BACK VIEW
Burner 1 Burner 2
NH
Gnd.
Burner 3
NH
Gnd.
Burner 4
Purple
Red/Yellow
When using 1-2 burners, use SPST
Transformer Relay.
When using 3-4 burners, use SPDT
Transformer Relay.
Low Voltage
Terminal Detail
on all Burners
COM
N.O.
COM
BLACK
GREEN
WHITE
BLACK
ORANGE
WHITE
WHITE
GREY
WHITE
WHITE
YELLOW
YELLOW
N.O.
GREEN
BLACK
BLUE
PURPLE
BLACK
BLACK
SENSOR
DOOR
SWITCH
TO THERMOSTAT
FLAME
BUSHING
TERMINAL
3
4
TRANSFORMER
1
5
IGNITER
VALVE
SMART
PRESSURE
SWITCH
MOTOR/BLOWER
L2
L1
Gnd.
120V-60Hz
supply circuit
SECTION 10: WIRING
10.4 Internal Wiring
43
Page 50
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
L
2
L
1
WHITE BLACK
WHITE
WHITE
BLACK
BLACK
GREY
WHITE
VALVE
HOT SURFACE IGNITER
FLAME
SENSOR
MOTOR
DOOR
SWITCH
YELLOW
YELLOW
PRESSURE
SWITCH
WHITE
TO
THERMOSTAT
ORANGE
BLUE
WHITE
PURPLE
TRANSFORMER
BX or Romex Connector
Junction Box
Electrical Cord or
Flexible Conduit
Burner
Connect wires together
with suitable approved
wire connectors.
Green to Ground
White to L2
Black to L1
L1
L2
Ground
Black
White
Green
10.5 Ladder Diagram
10.6 Electrical Connection to the Burner
44
Page 51
SECTION 11: OPERATION AND MAINTENANCE
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Edges are sharp.
WARNING
Failure to follow these instructions can result in death, electric shock, injury or property damage.
Burn Hazard
Allow heater to cool
before service.
Tubing may still be hot
after operation.
Explosion Hazard
Turn off gas supply to
heater before service.
DANGER
Electrical Shock Hazard
Disconnect electric
before service.
Heater must be
connected to a properly
grounded electrical
source.
SECTION 11: OPERATION AND MAINTENANCE
This heater is equipped with a hot-surface ignition
system.
11.1 Sequence of Operation
1. Turn the thermostat up. When the thermostat
calls for heat, the SmartValve
®
II will energize.
After a short period, power is supplied to the
blower motor.
2. When the motor approaches nominal running
RPM, the pressure switch closes and signals
the ignition module/SmartValve
3. The ignition module/SmartValve
®
II.
®
II then energizes the hot-surface igniter for a timed warm-up
period (approximately 45 to 60 seconds). After
the warm-up period, the gas valve is energized.
4. If a flame is detected, the gas valve remains
open and the igniter is de-energized. When the
6. If the flame extinguishes during operation, the
igniter module will provide multiple trial
sequences described in step 5. If ignition is not
re-established, the module/SmartValve
lockout for one hour or until reset.
7. After lockout, reset by turning down thermostat for five seconds, and then raising it again to desired temperature, or by disconnecting power and then reconnecting.
11.2 To Shut Off Heater
Set thermostat to lowest setting.
Turn OFF electric power to heater.
Turn OFF manual gas valve in the heater supply line.
11.3 To Start Heater
Turn gas valve and electric power OFF and wait five
minutes for unburned gases to vent from heater.
call for heat is satisfied and the system control
mechanism de-energizes the burner line voltage
supply, the gas is turned off.
5. If no flame is detected by the flame sensing rod,
the igniter is de-energized and the module/
SmartValve
begins. After the purge, the module/SmartValve
II acts to power the igniter for a second warm-up
period and a second trial for ignition period. If
flame is still not established, a third purge,
warm-up, and trial cycle begins. After four trials,
the module/SmartValve
hour or until reset.
®
II will close and a purge period
®
II will lockout for one
Turn ON main gas valve.
Turn ON electric power.
Set thermostat to desired temperature. Burner
should light automatically.
11.4 Pre-Season Maintenance and Annual Inspection
®
To e n s ure your safety and years of trouble-free operation of the heating system, ser
inspections must be done by a contractor qualified in
the installation and service of gas-fired heating
equipment.
Turn off gas and electric supplies before performing
vice and annual
®
II will
45
Page 52
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
service or maintenance. Allow heater to cool before
servicing.
Before every heating season, a contractor qualified in
the installation and service of gas-fired heating
equipment must perform a thorough safety inspection of the heater.
For best performance, the gas, electrical, thermostat
connections, tubing, venting, suspensions and over-
all heater condition should be thoroughly inspected.
NOTE: Gas flow and burner ignition are among the
first things that should be inspected.
Please see Page 46, Section 11.5 for suggested
items to inspect.
Installation Code and Annual Inspections:
All installation and service of ROBERTS GORDON
equipment must be performed by a contractor
qualified in the installation and service of equipment
sold and supplied by Roberts-Gordon LLC and
conform to all requirements set forth in the
ROBERTS GORDON
®
manuals and all applicable
governmental authorities pertaining to the
installation, service, operation and labeling of the
equipment.
To help facilitate optimum performance and safety,
Roberts-Gordon LLC recommends that a qualified
contractor conduct, at a minimum, annual
inspections of your ROBERTS GORDON
®
equipment and perform service where necessary,
using only replacement parts sold and supplied by
Roberts-Gordon LLC
11.5 Maintenance Checklist The Vicinity of the Heater Do not store or use flammable objects, liquids or vapors near the heater.
Immediately remove these items if they are present.
See Page 5, Section 3.
Vehicles and Other
Objects
Maintain the clearances to combustibles.
Do not hang anything from, or place anything on, the heater.
®
Make sure nothing is lodged underneath the reflector, in between the tubes or
in the decorative or protective grilles (included with select models).
Immediately remove objects in violation of the clearances to combustibles.
See Page 5, Section 3.
Reflector Support reflector with reflector hanger and support strap.
Reflector must not touch tube.
Make sure there is no dirt, sagging, cracking or distortion.
Do not operate if there is sagging, cracking or distortion.
Make sure reflectors are correctly overlapped. See Page 22, Section 6.5.1.
Clean outside surface with a damp cloth.
Vent Pipe Venting must be intact. Using a flashlight, look for obstructions, cracks on the
pipe, gaps in the sealed areas or corrosion.
The area must be free of dirt and du
st. Clean as required.
Remove any carbon deposits or scale using a wire brush.
See Page 34, Section 8.
Outside Air Inlet Inlet must be intact. Look for obstructions, cracks on the pipe, gaps in the
sealed areas or corrosion.
The area must be free of dirt and dust. Clean and reinstall as required.
Tubes Make sure there are no cracks.
46
Make sure tubes are connected and suspended securely.
See Page 13, Section 6.
Make sure there is no sagging, bending or distortion.
Clean or replace as required.
Page 53
SECTION 11: OPERATION AND MAINTENANCE
Gas Line Check for gas leaks. See Page 40, Section 9.
Burner Observation
Window
Blower Scroll, Wheel and
Motor
Make sure it is clean and free of cracks or holes.
Clean and replace as required.
Compressed air or a vacuum cleaner may be used to clean dust and dirt.
Burner Cup and Orifice Clear of obstructions (even spider webs will cause problems).
Carefully remove any dust and debris from the burner.
Hot-Surface Igniter Replace if cracked or broken.
Thermostat There should be no exposed wire or damage to the thermostat.
See Page 42, Section 10.
Suspension Points Make sure the heater is hanging securely. Look for signs of wear on the chain
or ceiling. See Page 14, Figure 14.
Decorative and Protective
Grille (optional)
The grille must be securely attached.
Check that the side reflector extensions are installed correctly and secured in
place if necessary. (Decorative grille only.)
See Page 31, Section 7.5 and Page 33, Section 7.6.
Make sure shield is installed correctly and secured in place if necessary.
(Decorative grille only.) See Page 32, Section 7.5.2.
Lower Clearance Shield
(optional)
The lo
wer shield must be securely attached. Inspect shield support straps
and lower clearance shield anchor points. See Page 31, Section 7.4.
Make sure shield is installed correctly and secured in place if necessary.
See Page 31, Section 7.4.
Wall Tag If wall tag is present, make sure it is legible and accurate. Please contact
Roberts-Gordon LLC or your ROBERTS GORDON
®
independent distributor,
if you need a wall tag. See Page 4, Section 2.1.
Safety Labels Product safety signs or labels should be replaced by the product user when
they are no longer legible. Please contact Roberts-Gordon LLC or your ROBERTS GORDON
®
independent distributor to obtain replacement signs or
labels. See Page 2, Figure 1 through Page 3, Figure 2.
47
Page 54
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
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.
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Edges are sharp.
WARNING
Failure to follow these instructions can result in death, injury or property damage.
Burn Hazard
Allow heater to cool
before service.
Tubing may still be hot
after operation.
Explosion Hazard
Turn off gas supply to
heater before service.
SECTION 12: TROUBLESHOOTING
DANGER
Electrical Shock Hazard
Disconnect electric before service.
Heater must be properly grounded.
Failure to follow these instructions can result
in death or electrical shock.
48
Page 55
SECTION 12: TROUBLESHOOTING
WARNING
Electrical Shock Hazard
Do not disconnect ground leads inside heater.
Do not interchange grounded and ungrounded
leads on transformer or ignition module.
Failure to follow these instructions can result
in death or electrical shock.
12.1 Honeywell SmartValve
®
II Troubleshooting
This heater is supplied with the Honeywell Smart-
®
Valve
II control system. This system is equipped with
a diagnostic function that will assist in performing
troubleshooting. The LED (Light Emitting Diode) indicator at the top of the SmartValve
®
II control will flash
in various patterns to indicate status. The LED status
indication chart provided below gives a summary of
possible faults.
LED Status Indicates
Off No power to the control
Bright-Dim Normal Operation.This indication
shows whenever the system is pow-
ered, unless some abnormal event
has occurred.
2 Flashes Pressure switch remains closed lon-
ger than 30 seconds after a call for
heat begins (pressure switch stuck
closed). The SmartValve
®
II checks
the status of the pressure switch contacts and must see a change in the
contact with every firing cycle. Placing
a jumper at the switch out of
sequence will result in a fault, with the
LED indicator flashing 2 times.
Page 52, Section 12.3 will provide the information
needed to test the manifold gas pressure setting.
Page 50, Section 12.2 will guide you through several
troubleshooting steps to determine possible problems with the systems.
3 Flashes Pressure switch remains open longer
than 30 seconds after combustion air
blower is energized. Check for correct
blower operation, blower intake
obstructions, pressure switch tubing
and wiring.
4 Flashes Limit string open, 2" white jumper wire
on valve is loose.
5 Flashes Flame signal sensed out of proper
sequence.
6 Flashes System Lockout. Flame sensing cir-
cuit is not functioning properly. Perform the checks following the "Does
the burner stay lit?" bubble in the trou-
bleshooting flow
chart on Page 50,
Section 12.2.
49
Page 56
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
12.2 Troubleshooting Flow Chart
50
Page 57
SECTION 12: TROUBLESHOOTING
51
Page 58
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
10.5"
Natural
Propane
6
5
4
3
2
1
0
1
2
3
4
5
6
3.5"
6
5
4
3
2
1
0
1
2
3
4
5
6
Top View of Heater
Manometer
Orifice
12.3 Manifold Gas Pressure Setting
52
Page 59
SECTION 13: REPLACEMENT PARTS
Carbon Monoxide Hazard
WARNING
Use only genuine ROBERTS GORDON® replacement parts per this installation, operation and
service manual.
Failure to follow these instructions can result in death, electric shock, injury or property damage.
Explosion Hazard
DANGER
Electrical Shock Hazard
Fire Hazard
SECTION 13: REPLACEMENT PARTS
53
Page 60
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Motor and Blower Assembly
Blower Inlet Gasket
Air Adapter
Collar
Burner Cup
Assembly
Mica Window
Assembly
Hot Surface
Igniter
SmartValve II
R
Thermostat
Connection
Transformer
Tube Gasket
Flame Sensor
Jumper Wire
Door Switch
Gas Valve
Orifice
Pressure Switch
54
Page 61
SECTION 13: REPLACEMENT PARTS
Description
Gas Valve (Natural)
Gas Valve (LP)
Tube Gasket
Blower Inlet Gasket
Motor and Blower Assembly
Air Adapter Collar
Door Switch
Burner Cup Assembly
Hot Surface Igniter
Mica Window Assembly
Flame Sensor
Transformer
Thermostat Connection
Jumper Wire
Pressure Switch:
(175)
(100)
(80,150)
(40, 60, 125)
Part Number
90068300
90068302
02568200
03050900
90708600-P
91911700
90436800
03020100
90436603K
02553203
90439300
90436900K
91317900
03090900
90439802K
90439803K
90439810K
90439805K
55
Page 62
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Turbulator
(Select Models)
Side View
Reflector
17.5"
(44 cm)
Minimum Length "A"
End View
13.5"
(34 cm)
9.5"
(24 cm)
Burner Tube
Heat Input Rate Length “A”
Recommended
Minimum Mounting Height*
Model (Btu/h) x (1000) Minimum Space Spot
CTH2-40 40 10' (3m) 8'-10' (2.4 - 3m) 8' (2.3m)
CTH2-60 60 20' (6m) 10'-12' (3 - 3.6m) 9' (2.7m)'
CTH2-80 80 20' (6m) 12'-15' (3.6 - 4.5m) 11' (3.3m)
CTH2-100 100 30' (9m) 12'-15' (3.6 - 4.5m) 12' (3.7m)
CTH2-125 125 40' (12m) 15'-20' (4.5 - 6m) 15' (4.6m)
CTH2-150 150 50' (15m) 20'-25' (6 - 7.6m) 20' (6.1m)
CTH2-175 175 60' (15m) 25' (7.6m) 23' (7m)
SECTION 14: GENERAL SPECIFICATIONS
14.1 Material Specifications
14.1.1 Reflectors
.024 Aluminum
(optional .024 Stainless Steel Type 304)
14.2 Heater Specifications
14.2.1 Ignition
Honeywell
®
SmartValve® II combines gas valve and
hot surface electronic ignition control. Fully auto-
matic, four-try, 100% s hut-off, prepurge, auto reset,
LED indicator status.
General Specifications for the heaters are as follows:
14.3 Suspension Specifications
Hang heater with materials with a minimum working
load of 75 lbs (33 kg). See Page 14, Figure 14.
14.4 Controls Specifications
Time switches, thermostats, etc. can be wired into
the electrical supply. External controls supplied as an
optional extra.
*See Page 5, Section 3 for clearances to combustibles.
GAS PRESSURE AT MANIFOLD:
Natural Gas: 3.5" wc
LP Gas: 10.5" wc
PIPE CONNECTION:
GAS INLET PRESSURE:
Natural Gas:
for 40,60,80,100,125,150 4.6" wc Minimum
for 175 5.0" wc Minimum
1/2" NPT (for 40, 60, 80, 100, 125)
3/4" NPT (for 150 & 175)
DIMENSIONS:
Vent Connection Size: 4" (10 cm)
Outside Air Connection Size: 4" (10 cm)
Refer to figure above for dimensional information.
56
LP Gas: 11.0 " wc Minimum
ELECTRICAL RATING (ALL MODELS):
120 V - 60 Hz., 1.0 A (run) 5.0 A (Start)
14.0" wcMaximum
14.0" wcMaximum
Page 63
SECTION 15: THE ROBERTS GORDON® VANTAGE® II WARRANTY
SECTION 15: THE ROBERTS GORDON
®
VANTAGE® II WARRANTY
ROBERTS-GORDON WILL PAY FOR:
Within 36 months from date of purchase by buyer or 42
months from date of shipment by Roberts-Gordon LLC
(whichever occurs first), replacement parts will be provided
free of charge for any part of the product which fails due to
a manufacturing or material defect.
Roberts-Gordon LLC will require the part in question to be
returned to the factory. Roberts-Gordon LLC will, at its sole
discretion, repair or replace after determining the nature of
the defect and disposition of part in question.
ROBERTS GORDON
®
Replacement Parts are warranted
for a period of 12 months from date of shipment from
Roberts-Gordon LLC or the remaining ROBERTS
GORDON
®
VANTAGE® II warranty.
ROBERTS-GORDON WILL NOT PAY FOR:
Service trips, service calls and labor charges.
Shipment of replacement parts.
Claims where the total price of the goods have not
been paid.
Damage due to:
• Improper installation, operation or maintenance.
• Misuse, abuse, neglect, or modification of the
ROBERTS GORDON
• Use of the ROBERTS GORDON
®
VANTAG E® II in any way.
®
VANTAG E® II for
other than its intended
purpose.
• Incorrect gas or electrical supply, accident, fire, floods,
acts of God, war, terrorism, or other casualty.
• Improper service, use of replacement parts or accessories not specified by Roberts-Gordon.
• Failure to install or maintain the ROBERTS GORDON
VANTAG E® II as directed in the Installation, Operation
and Service manual.
®
• Relocation of the ROBERTS GORDON
VANTAG E® II
after initial installation
®
• The use of the ROBERTS GORDON
VANTAG E® II in
a corrosive atmosphere containing contaminants.
®
• The use of the ROBERTS GORDON
VANTAG E® II in
the vicinity of a combustible or explosive material.
®
• Any defect in the ROBERTS GORDON
VANTAG E® II
arising from a drawing, design, or specification sup-
plied by or on behalf of the consumer.
• Damage incurred during shipment. Claim must be filed
with carrier.
WARRANTY IS VOID IF:
The ROBERTS GORDON® VANTAG E® II is not installed
by a contractor qualified in the installation and service of
gas fired heating equipment.
Yo u cannot prove original purchase date and required
annual maintenance history.
The data plate and/or serial number are removed,
defaced, modified or altered in any way.
The ownership of the ROBERTS GORDON
is moved or transferred. This warranty is nontransferable.
®
VANTAGE® II
Roberts-Gordon is not permitted to inspect the damaged
controller and/or component parts.
READ YOUR INSTALLATION, OPERATION AND
SERVICE MANUAL
If you have questions about your controller, contact your
installing professional. Should you need Replacement
Parts or have additional questions, call or write:
Roberts-Gordon LLC
1250 William Street
P. O . B o x 4 4
Buffalo, New York 14240-0044
Telephone: +1.716.852.4400
Fax: +1.716.852.0854
Toll Free: 800.828.7450
www.rg-inc.com
www.radiantheaters.com
Roberts-Gordon LLC's liability, and your exclusive
remedy, under this warranty or any implied warranty
(including the implied warranties of merchantability
and fitness for a particular purpose) is limited to
providing replacement parts during the term of this
warranty.
Some jurisdictions do not allow limitations on
how long an implied warranty lasts, so this limitation may
not apply to you. There are no rights, warranties or
conditions, expressed or implied, statutory or otherwise,
other than those contained in this warranty.
Roberts-Gordon LLC shall in no event be responsible
for incidental or consequential damages or incur
liability for damages in excess of the amount paid by
®
you for the ROBERTS GORDON
®
VANTAGE® II. Some
jurisdictions do not allow the exclusion or limitation of
incidental or consequential damages, so this limitation or
exclusion may not apply to you. This warranty gives you
specific legal rights, and you may also have other rights
which vary from jurisdiction to jurisdiction.
Roberts-Gordon shall not be responsible for failure to
perform under the terms of this warranty if caused by
circumstances out of its control, including but not limited to
war, fire, flood, strike, government or court orders, acts of
God, terrorism, unavailability of supplies, parts or power.
No person is authorized to assume for Roberts-Gordon
any other warranty, obligation or liability.
LIMITATIONS ON AUTHORITY OF
REPRESENTATIVES:
No representative of Roberts-Gordon LLC, other than an
Executive Officer, has authority to change or extend these
provisions. Changes or extensions shall be binding only if
confirmed in writing by Roberts-Gordon LLC's duly
authorized Executive Officer.
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