Roberts Gorden | CTH2-100 | User's Manual | Roberts Gorden CTH2-100 User's Manual

Roberts Gorden CTH2-100 User's 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. 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.
WARNING
®
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
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.
Installer
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.
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. Box 44
Buffalo, New York 14240-0044
Telephone: +1.716.852.4400
Fax: +1.716.852.0854
Toll Free: 800.828.7450
© 2012 Roberts-Gordon LLC
www.rg-inc.com
www.radiantheaters.com
P/N 130100NA Rev. M 02/12
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 Lower 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 Tube Termination ...................... 35
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
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 Sequence 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® II Troubleshooting .............. 49
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® VANTAGE® II
Warranty ......................................................... 57
© 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.
Printed in U.S.A.
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 Overview ...................... 25
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
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
SECTION 1: HEATER SAFETY
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.
1.1 Manpower Requirements
To prevent personal injury and damage to the heater,
two persons will be required for installation.
1.2 Safety Labels and Their Placement
Product safety signs or labels should be replaced by
the product user when they are no longer legible.
Please contact Roberts-Gordon or your ROBERTS
GORDON® independent distributor to obtain
Read this manual carefully before installation, opera- replacement signs or labels. See Page 2, Figure 1
through Page 3, Figure 2.
tion 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.
1.3 California Proposition 65
In accordance with California Proposition 65 requirements, 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
Protective gear is to be worn during installation,
placing label on areas with extreme heat, cold, corrooperation and service. Thin sheet metal parts, includ- sive chemicals or other elements. To order additional
ing the aluminum reflector portion of the heater and
labels, please contact Roberts-Gordon LLC or your
the various venting components, have sharp edges. ROBERTS GORDON® independent distributor.
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.
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
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
FIGURE 1: Top and Bottom Panel Label Placement
Logo Label
Rating Plate Label
Bottom
Panel
Description
Logo Label
Rating Plate Label
Gas Connection Label
Proposition 65 Label
Part Number
91013200
91010401
91018122
91070015
Proposition 65 Label
Top Panel
Gas Connection Label
2
SECTION 1: HEATER SAFETY
FIGURE 2: Side and Back Panel Label Placement
Control Side Panel
Clearances to Combustibles Label
Control Side Panel (Inside)
Wiring Label
Vent Length Label
Thermostat
Connection
Label
Back Panel
Lighting Instruction Plate Label
Description
Clearances to Combustibles Label
Wiring Label
Low Voltage Connection Label
Vent Length Label
Lighting Instruction Plate Label
Part Number
91013415
91013300
91039700
91039500
91029602
3
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
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
• To install the heater, as well as the gas and electriin permanent ink according to your model number
cal supplies, in accordance with applicable specifi- and configuration in the open spaces on the tag.
cations and codes. Roberts-Gordon recommends
the installer contact a local Building Inspector or
2.2 Corrosive Chemicals
Fire Marshal for guidance.
SECTION 2: INSTALLER RESPONSIBILITY
The installer is responsible for the following:
• To use the information given in a layout drawing
and in the manual together with the cited codes
and regulations to perform the installation.
CAUTION
• 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 suspend anything from heater.
• To ensure there is adequate air circulation around
the heater and to supply air for combustion, ventilation and distribution in accordance with local
codes.
• To safely and adequately install heater using
materials with a minimal working load of 75 lbs
(33 kg).
• To ensure the heater is placed in 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
4
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.
SECTION 3: CLEARANCES TO COMBUSTIBLES
SECTION 3: CLEARANCES TO COMBUSTIBLES
3.1 Required Clearances to Combustibles
WARNING
Clearances are the required distances that combustible 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 clearances 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 clearances on each burner for the model heater being
installed to make sure the product is suitable for your
application and the clearances are maintained. Read
and follow the safety guidelines below:
• Keep gasoline or other combustible materials
including flammable objects, liquids, dust or
vapors away from this heater or any other appliance.
• The stated clearances to combustibles represents
a surface temperature of 90° F (50°C) above room
temperature. Building materials with a low heat tolerance (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.
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.
• 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 suspension requirements on Page 14, Figure 14.
• If the radiant tubes must pass through the building
structure, be sure that adequate sleeving and fire
stop is installed to prevent scorching and/or fire
hazard.
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows.
2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream
from where the burner and burner tube connect.
FIGURE 3: STANDARD REFLECTOR
Model
A
(inches)
B
C
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
D
A
(centimeters)
B
C
D
5
CTH2-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 4: ONE SIDE REFLECTOR
A
C
B
D
Model
A
(inches)
B
C
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
Model
A
(inches)
B
C
D
A
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
Model
A
(inches)
B
C
D
A
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
D
A
(centimeters)
B
C
D
FIGURE 5: TWO SIDE REFLECTORS
A
C
B
D
(centimeters)
B
C
D
FIGURE 6: 45° TILT REFLECTOR
6
(centimeters)
B
C
D
SECTION 3: CLEARANCES TO COMBUSTIBLES
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows.
2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream
from where the burner and burner tube connect.
FIGURE 7: U-TUBE, STANDARD REFLECTOR
Model
A
B
A
D
D
A
- UNAPPROVED -
CTH2-40
C
(inches)
B
C
(centimeters)
B
C
D
- UNAPPROVED -
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
A
(inches)
B
C
FIGURE 8: U-TUBE, 45°
Model
A
D
C
A
- UNAPPROVED -
CTH2-40
B
D
(centimeters)
B
C
D
- 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
Model
A
B
C
A
D
A
- UNAPPROVED -
CTH2-40
D
(inches)
B
C
(centimeters)
B
C
D
- UNAPPROVED -
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
7
CTH2-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 10: 2-FOOT DECO GRILLE AND PROTECTIVE GRILLE
(inches)
Model
A
B
C
A
C
B
D
D
A
(centimeters)
B
C
D
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
Model
A
(inches)
B
C
D
A
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
FIGURE 11: LOWER CLEARANCE SHIELD*
A
C
B
D
CTH2-175
(centimeters)
B
C
D
- UNAPPROVED -
- UNAPPROVED -
F
A
(centimeters)
E
F
*When installed in the first 10' (3 m).
FIGURE 12: VENTING
A
Unvented
Radiant Tubes
Vented
8
E
Vent
Pipes
F
Model
A
(inches)
E
CTH2-40
14
18
18
36
46
46
CTH2-60
14
18
18
36
46
46
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
SECTION 4: NATIONAL STANDARDS AND APPLICABLE CODES
SECTION 4: NATIONAL STANDARDS AND
APPLICABLE CODES
4.1 Gas Codes
The type of gas appearing on the nameplate
must be the type of gas used. Installation must
comply with national and local codes and
requirements of the local gas company.
United States: Refer to National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 - latest revision.
4.2 Aircraft Hangars
Installation in aircraft hangars must be in
accordance with the following codes:
United States: Refer to Standard for Aircraft
Hangars, NFPA 409 - latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 - latest revision.
In aircraft storage and servicing areas, heaters
shall be installed at least 10' (3 m) above the
upper surface of wings or of engine enclosures
of the highest aircraft which may be housed in
the hangar. The measurement shall be made
from the wing or engine enclosure (whichever is
higher from the floor) to the bottom of the heater.
• In shops, offices and other sections of aircraft
hangars communicating with aircraft storage or
servicing areas, heaters shall be installed not
less than 8' (2.4 m) above the floor.
• Suspended or elevated heaters shall be so
located in all spaces of aircraft hangars that they
shall not be subject to injury by aircraft, cranes,
movable scaffolding or other objects. Provisions
shall be made to assure accessibility to
suspended heaters for recurrent maintenance
purposes.
4.3 Public Garages
Installation in garages must be in accordance
with the following codes:
United States: Refer to Standard for Parking
Structures NFPA 88A - latest revision or the
Code for Motor Fuel Dispensing Facilities and
Repair Garages, NFPA 30A - latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 - latest revision.
• Heaters must not be installed less than 8'
(2.4 m) above the floor. Minimum clearances to
combustibles must be maintained from vehicles
parked below the heater.
• When installed over hoists, minimum
clearances to combustibles must be maintained
from the upper most point of objects on the hoist.
4.4 Electrical
The heater must be electrically grounded in
accordance with the following codes:
United States: Refer to National Electrical
Code®, NFPA 70 - latest revision. Wiring must
conform to the most current National Electrical
Code®, local ordinances and any special
diagrams furnished.
Canada: Refer to Canadian Electrical Code,
CSA C22.1 Part 1 - latest revision.
4.5 Venting
The venting must be installed in accordance with
the requirements within this manual and the
following codes:
United States: Refer to National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 - latest revision.
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
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
SECTION 5: MAJOR COMPONENTS
FIGURE 13: Major Component Descriptions
Burner with Tube Gasket
Must be installed with the
flame observation
window facing down.
Burner Tube
Supplied in 10'
(3 m) lengths. Burner
tube is always the first tube
after the burner.
Tube and Reflector Hanger
with Clamp Package
Position this hanger no more
than 4" (10 cm) away from the
burner.
Tube and Reflector Hanger
Suspend system from these
hangers.
Reflector
(Aluminum or
Stainless
Steel)
Alternate overlap as
shown on overview and
on Page 16, Figure 16.
Minimum overlap is 6" (16 cm).
Tube
Hot rolled or heat
treated aluminized tube
supplied in 10' (3 m) lengths.
Coupling Assembly
with Lock
Reflector End Cap
Punch out center
section to
accommodate tube.
Vent Adapter
Reflector Support Strap &
Wire Form
Turbulator
Flex Gas Line with
Shut Off Cock
10
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.
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
Hot Rolled
Hot Rolled
Aluminized
(6m)
(9m)
(12m)
(3m)
(6m)
(9m)
(12m)
(3m)
(6m)
(9m)
(12m)
(3m)
(6m)
(9m)
(12m)
91409300 Tube, Hot Rolled Steel, 10' (3 m)
1
2
3
-
-
-
-
1
2
3
4
-
-
-
-
91409408 Tube, HT Aluminized, 10' (3 m)
-
-
-
-
1
2
3
-
-
-
-
1
2
3
4
03051101 Burner Tube, ALUMI-THERM® Steel, 10' (3 m)
-
1
1
-
-
1
1
-
-
-
-
-
-
-
-
03051601 Burner Tube, HT ALUMI-THERM® Steel, 10' (3 m)
1
-
-
1
1
-
-
-
-
-
-
-
-
-
-
01312700 Coupling Assembly
1
2
3
-
1
2
3
1
2
3
4
1
2
3
4
02750303 Standard Reflector, 8' (3.5 m)
3
4
6
2
3
4
6
2
3
4
6
2
3
4
6
02750800 End Cap
2
2
2
2
2
2
2
-
-
-
-
-
-
-
-
03090100 Tube and Reflector Hanger
3
4
5
2
3
4
5
1
2
3
4
1
2
3
4
91907302 S-Hook
3
4
5
2
3
4
5
1
2
3
4
1
2
3
4
03050010 Reflector Support Package (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
-
-
-
-
-
-
-
-
CP40HRS
CP10ALUM
CP20ALUM
CP30ALUM
CP40ALUM
EXP10HRS
EXP20HRS
EXP30HRS
EXP40HRS
EXP10ALUM
EXP20ALUM
EXP30ALUM
EXP40ALUM
20' 30' 40' 10' 20' 30' 40' 10' 20' 30' 40' 10' 20' 30' 40'
CP30HRS
Description
Aluminized
CP20HRS
Part No.
Extension Packages
Part Number
11
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Table 3: Component Package Guide
Model
Tubing Length
Core Packages
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
SECTION 6: HEATER INSTALLATION
SECTION 6: HEATER INSTALLATION
WARNING
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.
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.
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
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
FIGURE 14: Critical Hanger Placement
Typical Suspension Details
Beam Clamp
Anchor
Screw Hook
3/8"
24" min.*
(61 cm)
Chain Size
3/16"
Minimum
Rod 3/8"
Concrete Beam
Wood Beam
Locknut
Washers
“X”*
S-hooks
Turnbuckle
Not Included
* Allows for thermal expansion of system
S-hooks
Hanger
Side View
Hanger
Reflector
Must Be Within 4" (10 cm)
Description
S-Hook
Tube/Reflector Hanger
14
Part Number
91907302
03090100
Front View
Run Length
10' (3 m) - 50' (15 m)
51' (15 m) - 60' (18 m)
61' (18 m) - 70' (24 m)
45° Angle
Typical Expansion
±1" (3 cm)
±2" (5 cm)
±3" (8 cm)
Minimum “X” Length
12" (305 mm)
18" (457 mm)
24" (609 mm)
Reflector Support
Tube and Reflector Hanger
Coupling
Burner Tube
Tube Clamp
Package
Burner
Reflector End Cap
Reflector
Vent Adapter
Tube
Turbulator
(With Select Models)
U-Clips
SECTION 6: HEATER INSTALLATION
FIGURE 15: Linear Heater Assembly Overview
15
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
FIGURE 16: Linear Heater Layout Overview
LEGEND
g
b
c
d
Burner
Reflector
f
10' Tube Length
Tube
Tube/Reflector
Hanger
Coupling
Assembly
g
b
c
d
e
Vent Adapter
a = 14" (36 cm)
reflector width (not shown)
f
b = 2" (5 cm)
end cap to burner
20' Tube Length
c = 2" (5 cm)
end cap to hanger
d = 7'6" (229 cm)
distance first hanger
g
b
c
d
e
e
e = 10' (305 cm)
distance between hangers
f = 9.5" (24 cm)
burner height
f
g = 17.5" (44 cm)
burner length
30' Tube Length
g
b
c
d
e
f
40' Tube Length
16
e
e
SECTION 6: HEATER INSTALLATION
FIGURE 17: Linear Heater Layout Overview (Continued)
g
b
c
d
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
f
50' Tube Length
g
b
c
d
e
f
60' Tube Length
g
b
c
d
e
b
f
70' Tube Length
g
b
c
d
e
e
b
f
80' Tube Length
17
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Step 6.1 Burner Tube Installation
NOTE:
Tubing requires a downward
slope of 1/2" (1.3 cm)
per 20' (6 m) away
from burner.
Offset mounting
hole must be
to the top.
S-hook
Hanger
Burner Tube
Weld seam
must be to the
bottom of the tube.
7' 6" ± 1'
(229 cm ± 25 cm)
Description
Burner Tube
S-Hook
Tube/Reflector Hanger
Part Number
03051XXX
91907302
03090100
Step 6.2 Tube Clamp Package Installation
Tube Clamp
Flat
Washer
Nut
(Torque 120 in/lb
13.56 Nm)
Description
Tube Clamp Package
Tube Clamp
Bolt
Flat Washer
Nut
18
Part Number
01318901
01396801
97113940
95211600
92113900
Bolt
SECTION 6: HEATER INSTALLATION
Step 6.3 Coupling and Tube Assembly
Close coupling
A with
tab.
Start Slide bar/Coupling Lock
B onto
coupling.
Tab
Slide Bar/Coupling Lock
Wide End
Coupling
Open
3" (8 cm) to
4" (10 cm)
Closed
C Insert tubes into coupling.
D Tighten coupling to join tubes.
Slide Bar/Coupling Lock
Coupling
Orient coupling so that
the impact block is in the
2:00 or 10:00 o’clock
positions.
Tube
Tube
Tube
Description
Coupling
Slide Bar/Coupling Lock
Tube
Part Number
01329600
01329700
91409XXX
Step 6.3.1 Coupling and Tube Assembly (Continued)
Tighten slide bar as shown below.
Drive slide bar until tight.
End of slide bar should be
within tolerance listed below.
± 2" (5 cm)
Correct slide bar
dimensions
Incorrect slide bar
position
• Repeat Step 6.3 A - D until all tubes are assembled. See Page 20, Section 6.3.2.
19
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Step 6.3.2 Coupling and Tube Assembly (Continued)
Model
CTH2-40
CTH2-60
CTH2-80
CTH2-100
CTH2-125
CTH2-150
CTH2-175
Tube Length Minimum
10' (3 m)
20' (6 m)
20' (6 m)
30' (9 m)
40' 12 m)
50' (15 m)
60' (18 m)
7' 6" ± 1'
(2.3 m ± .25 m)
10' ± 1'
(3 m ± .25 m)
Total Overall
Tube Length
Step 6.4 Turbulator Installation
Turbulator must be installed in
the last standard section of
tube. Turbulator is not required
on the CTH2-125/150/175.
Twist
Turbulator
Section
Turbulator
Adapter
Tab
Turbulator Section
(stainless) used in CTH2-40
heaters must be in the section of
tube nearest to the burner.
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
Pull String
Description
Turbulator Adapter
Turbulator Section
Turbulator Section (stainless)
Tube
20
Part Number
03051503
03051504
03051505
91409XXX
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.
SECTION 6: HEATER INSTALLATION
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.
NOTE: All tube surfaces must be covered
by a reflector, except for a U-Tube.
Hanger
Burner Tube
Reflector
Description
Tube/Reflector Hanger
Burner Tube
Reflector
Part Number
03090100
03051XXX
02750303
21
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
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 movement 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.
1. The first reflector after the burner must be affixed in
the middle of the reflector with a reflector support and
tight screws.
Tight
Sheet Metal
Screw
Wire Form
Reflector
End Cap
First Reflector
Reflector Support
Strap
U-clips
Overlap must be a
minimum of 6" (16 cm).
2B
Slip Overlap
6"
(16 cm)
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.
Loose screws
loosened 1/16"
(.16 cm) to allow
slippage.
2A
Slip Overlap
3A
Non-Slip 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.
Description
Reflector Support Package
Wire Form
Reflector Support Strap
Screw #8 x 3/4
U-Clip Package
Reflector End Cap
22
Part Number
03050010
91908004
03050000
94320812
91107720
027508XX
Reflector
Reflector
Support
Reflector
Tight
Screws
3B
Non-Slip Overlap
U-clip
(2 Clips per
Non-slip Overlap
Inside a Hanger)
SECTION 6: HEATER INSTALLATION
Step 6.6 Burner Installation
Burner
Gasket
S-hook
Burner Tube
Burner must be installed
with the flame observation
window facing down.
Description
Bolt
Burner
Lock Washer
Gasket
Part Number
94273914
030XXXXX
96411600
02568200
Lock
Washer
Bolt
(Torque 120 in/lb
13.56 Nm)
23
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
SECTION 7: OPTIONAL HEATER ACCESSORIES
WARNING
Cut/Pinch Hazard
Wear protective gear during installation,
operation and service.
Edges are sharp.
Failure to follow these instructions can result
in injury.
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 horizontal 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 (See Page 20, Figure 6.4)
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.
24
SECTION 7: OPTIONAL HEATER ACCESSORIES
FIGURE 18: U-Tube Heater Assembly Overview
25
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
FIGURE 19: U-Tube Heater Layout Overview
LEGEND
g
Burner
b
c
e
Reflector
Tube 10'
h
Tube 5' **
20' Tube Length*
Tube/Reflector
Hanger
Coupling
Assembly
g
U-Tube
b
c
d
f
a = 14" (36 cm)
reflector width (not shown)
b = 2" (5 cm)
end cap to burner
h
30' Tube Length**
c = 2" (5 cm)
end cap to hanger
d = 7'6" (229 cm)
distance first hanger
e = 10' (305 cm)
distance between hangers
g
b
c
d
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.
26
h
40' Tube Length
e
SECTION 7: OPTIONAL HEATER ACCESSORIES
FIGURE 20: U-Tube Heater Layout Overview (Continued)
g
b
c
d
e
f
h
50' Tube Length* **
g
b
c
d
e
e
e
e
e
e
h
60' Tube Length
g
b
c
d
f
h
70' Tube Length**
g
b
c
d
e
h
80' Tube Length
27
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
7.2 Elbow Package Configuration
Step 7.2.1 Elbow Installation
Tube
Coupling
Description
Elbow Package
90° Elbow
Coupling
Reflector End Cap
Reflector Joint Piece
U-Clip Package
Part Number
02718702
01335801
01312700
02750800
02750900
91107720
90° Elbow
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)
Step 7.2.2 Elbow Installation
Tube
Coupling
Step 7.2.3 Reflector Joint Installation
28
SECTION 7: OPTIONAL HEATER ACCESSORIES
Step 7.2.4 Reflector Joint Installation
Step 7.2.5 Reflector Joint Detail
FIGURE 21: Reflector Joint Detail
29
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
7.3 Reflector Side Extension
Step 7.3.1 Bracket Installation
Tube
Reflector
Tube and Reflector Hanger
Reflector Support
Reflector Side
Extension Bracket
(2 per Reflector)
Use additional supports
in high air movement
applications.
Description
Reflector Side Extension Package
Reflector Side Extension
Retainer Clips
Sheet Metal Screws
Order Separately
Reflector Side Extension
Part Number
02712700
01368000
02751200
94118106
01329910
Step 7.3.2 Side Reflector Installation
#8 x 3/8 (3.9 x 9.5 mm) Sheet Metal Screw
Cut relief notches for
supports and hangers.
Retainer Clip
(2 per Side)
Reflector Side Extension
30
SECTION 7: OPTIONAL HEATER ACCESSORIES
7.4 Lower Clearance Shield Installation
Step 7.4.1 Shield Support Strap Assembly
Reflector
17"
(43 cm)
12"
(30 cm)
Align Pilot Holes
Lower Clearance Shield
Locknuts
Washers
Screws
Description
Lower Clearance Shield Package
Shield Support Strap
Lower Clearance Shield 8'
Locknut #8
Flat Washer #8
Screw #8 x 3/8"
Part Number
01397501
01397500
02793000
92311400
95310800
93511406
Description
Aluminum Grille 2' x 4' (.6m x 1.2 m)
Part Number
91407000
7.5 Two-Foot Decorative Grille Installation
Step 7.5.1 Grille Installation
31
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Step 7.5.2 Frame Shield Installation
Description
Deco Grille Shield
Part Number
01365900
Step 7.5.3 Reflector Side Extension Installation for Decorative Grilles
Distance "A"
Minimum
Maximum
2" (4 cm)
6" (15 cm)
6" (15 cm)
10" (26 cm)
10" (26 cm)
14" (37 cm)
32
Extension
Part No.
Width
01370408
8" (20 cm)
01370412
12" (30 cm)
01370416
16" (40 cm)
Description
Reflector Side Extension
Part Number
01370412
SECTION 7: OPTIONAL HEATER ACCESSORIES
7.6 Protective Grille Installation
Step 7.6.1 Silicone Cap Installation
Silicone Cap
Description
Grille Section
Grille End Cap
Silicone Cap
Grille
Finger
Part Number
08050001
08050002
91915951-6P
Step 7.6.2 Grille End Cap Installation
B
A
Grille
Grille End Cap
C
D
Bend up 90°.
Pull outward.
Step 7.6.3 Grille Installation
Reflector
40"
(101 cm)
Grille
Final Grille
Section
Grille
End Cap
33
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
SECTION 8: VENTING
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
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 building ventilation
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.
Secure all joints with #8 x 3/8 sheet metal screws.
Seal all joints with high temperature silicone sealant.
Cut/Pinch Hazard
Wear protective gear during installation,
operation and service.
Edges are sharp.
Failure to follow these instructions can result
in injury.
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' (10 cm) vent
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
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) above any door,
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 switch.
SECTION 8: VENTING
8.3 Horizontal Venting
In noncombustible walls only, vent terminal
(P/N 02537801-1P) may be used.
FIGURE 22: Tube Termination
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.
8.6 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).
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) must 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.
The total vent length, plus outside air duct length,
plus any extensions to minimum heat exchanger
lengths, cannot exceed 65' (19.8 m).
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.
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. Insulation
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.
Subtract 15' (4.6 m) of maximum allowed vent or duct
length per vent elbow if more than two are used.
8.7 Horizontal Ventilation 4" (10 cm) Pipe
SIDE VIEW
Non-Combustible Wall Only
Combustible or
Non-Combustible Wall
Vent Adapter
Vent Adapter
18" (46 cm)
Min.
4" (10 cm)
Single Wall Pipe
Vent Terminal
4" (10 cm) Single Wall Pipe
Vent Terminal
Description
Part Number
Vent Terminal (Comb. Wall)
90502100
Vent Terminal
02537801-XX
35
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
8.8 Vertical Ventilation 4" (10 cm) Pipe
Description
Vent Cap 4" (10 cm)
Part Number
90502300
Step 8.9 Common Sidewall Venting
TOP VIEW
Vent Terminal
Tjernlund VH1-6 or Equivalent
Outside Wall
Vent Adapter
6" (15 cm) Single Wall Pipe
Sweeping 'T'
Connection
Vent Adapter
4" (10 cm) Single Wall Pipe
Vent Terminal
Tjernlund VH1-6 or Equivalent
Outside Wall
6" (15 cm) Single Wall Pipe
Vent Adapter
Sweeping 'Y'
Connection
4" (10 cm) Single Wall Pipe
4" (10 cm) Single Wall Pipe
Description
Vent Terminal 6" (15 cm)
Part Number
90502101
Vent Adapter
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
SECTION 8: VENTING
8.10 Common Vertical 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
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
8.11 Outside Combustion Air Supply
mended with unvented heaters.
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.
The air supply duct may have to be insulated to prevent condensation on the outer surface. The outside
air terminal must not be more than 1' (31 cm) above
the vent terminal.
Use of optional outside combustion air is not recom-
Follow the constraints listed on Page 35, Section 8.6.
8.11.1 Length Requirements
8.11.2 Vertical Outside Air Supply for Single Heater Installation
Description
Vent Cap 4" (10 cm)
Part Number
90502300
Vent Cap
Wall
8.11.3 Horizontal Outside Air Supply for Single Heater Installation
4" (10 cm)
Single Wall Pipe
Flex Hose
(Recommended)
Burner
Band Clamp
(Recommended)
Description
Vent Cap 4" (10 cm)
38
Part Number
90502300
SECTION 8: VENTING
8.11.4 Vertical Outside Air Supply for Double Heater Installation
Vent Cap
Roof
6" (15 cm) Single Wall Pipe
Flex Hose
(Recommended)
Burner
Band Clamp
(Recommended)
Description
Vent Cap 6" (15 cm)
Sweeping 'T'
Connection
Burner
Flex Hose
(Recommended)
4" (10 cm)
Single Wall Pipe
Part Number
90502302
Requirements:
• Heaters must be controlled by a common thermostat.
8.11.5 Horizontal Outside Air Supply for Double Heater Installation
Vent Cap
Outside Wall
6" (15 cm) Single Wall Pipe
Flex Hose
(Recommended)
Burner
Sweeping 'Y'
Connection
4" (10 cm) Single Wall Pipe
(Seal All Joints)
Burner
Description
Vent Cap 6" (15 cm)
Part Number
90502302
Band Clamp
(Recommended)
Requirements:
• Heaters must be controlled by a common thermostat.
39
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
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.
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.
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
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 usually 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.
SECTION 9: GAS PIPING
FIGURE 23: Gas Connection with Flexible Gas Hose
CORRECT POSITIONS
CAUTION
Product Damage Hazard
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.
Hold gas nipple securely with pipe wrench
when attaching gas hose.
Failure to follow these instructions can result
in product damage.
Vertical
(as shown left)
12"
(30 cm)
3" (8 cm)
max. displacement
45°
Side View
Alternate
positions
okay
Horizontal
Flexible Gas Hose
36" (91 cm) length
Heater Movement
End View
INCORRECT POSITIONS (WRONG INSTALLATION)
Heater Movement
Heater Movement
Heater Movement
Description
1/2" Flexible Stainless Steel Gas Hose (US Models)
3/4" Flexible Stainless Steel Gas Hose (US Models)
1/2" Rubber Type 1 Gas Hose (Canadian Models)
3/4" Rubber Type 1 Gas Hose (Canadian Models)
Heater Movement
Part Number
91412200
91412204
91412206
91412207
41
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
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 heaters on one low voltage thermostat, the low voltage
terminals on each heater must be connected as
shown in detail. Heater must be grounded in accordance 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.
10.1 Line Voltage Thermostat Wiring
Line Voltage
Thermostat
120 V-60 Hz
Supply Circuit
Gnd.
T
H
L1
L2
Gnd.
Gnd.
N
H
N
Low Voltage
Terminal Detail
On All Burners
10.2 Low Voltage Thermostat with One Burner
120 V-60 Hz
Supply Circuit
L1
L2
Gnd.
42
H
T
N
Gnd.
Low Voltage
Thermostat
Low Voltage
Terminal Detail
SECTION 10: WIRING
10.3 Low Voltage Thermostat Wiring with Multiple Burners
FRONT VIEW
Transformer Relay
BACK VIEW
Low Voltage Thermostat
1
2
4
Black
R
3
COIL
5
C
6
COIL
W
G
Y
Purple
Black
White
Burner 1
Red
Burner 2
Low Voltage
Terminal Detail
on all Burners
120V-60 Hz
supply circuit
Gnd.
H
Gnd.
N
H
N
L1
L2
Burner 3
Gnd.
When using 1-2 burners, use SPST
Transformer Relay.
When using 3-4 burners, use SPDT
Transformer Relay.
Burner 4
Gnd.
Red/Yellow
H
Gnd.
N
H
N
10.4 Internal Wiring
SMART
VALVE
120V-60Hz
supply circuit
TRANSFORMER
L2
L1
WHITE
BLACK
Gnd.
1
5
3
4
WHITE
YELLOW
ORANGE
BLUE
N.O.
YELLOW
COM
PURPLE
TO THERMOSTAT
GREEN
PRESSURE
SWITCH
COM
DOOR N.O.
SWITCH
BLACK
BLACK
WHITE
WHITE
BLACK
BLACK
WHITE
TERMINAL
GREY
BUSHING
FLAME
SENSOR
MOTOR/BLOWER
IGNITER
GREEN
43
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
10.5 Ladder Diagram
L2
L1
TRANSFORMER
WHITE
BLACK
ORANGE
BLUE
VALVE
WHITE
TO
THERMOSTAT
PRESSURE
SWITCH
YELLOW
YELLOW
PURPLE
HOT SURFACE IGNITER
WHITE
WHITE
WHITE
BLACK
DOOR
SWITCH
GREY
FLAME
SENSOR
MOTOR
WHITE
BLACK
10.6 Electrical Connection to the Burner
Electrical Cord or
Flexible Conduit
BX or Romex Connector
Burner
44
Connect wires together
with suitable approved
wire connectors.
L1
L2
Ground
Green to Ground
White to L2
Black to L1
Black
White
Green
Junction Box
SECTION 11: OPERATION AND MAINTENANCE
SECTION 11: OPERATION AND MAINTENANCE
WARNING
DANGER
Electrical Shock Hazard
Disconnect electric
before service.
Explosion Hazard
Turn off gas supply to
heater before service.
Heater must be
connected to a properly
grounded electrical
source.
Burn Hazard
Allow heater to cool
before service.
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Tubing may still be hot
Edges are sharp.
after operation.
Failure to follow these instructions can result in death, electric shock, injury or property damage.
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® II.
®
3. The ignition module/SmartValve 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
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® II will close and a purge period
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® II will lockout for one
hour or until reset.
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® II will
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.
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 ensure your safety and years of trouble-free operation of the heating system, service and annual
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
45
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 overall 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.
Vehicles and Other
Objects
See Page 5, Section 3.
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.
Reflector
See Page 5, Section 3.
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.
Vent Pipe
Clean outside surface with a damp cloth.
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 dust. Clean as required.
Remove any carbon deposits or scale using a wire brush.
Outside Air Inlet
Tubes
See Page 34, Section 8.
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.
Make sure there are no cracks.
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.
46
SECTION 11: OPERATION AND MAINTENANCE
Gas Line
Burner Observation
Window
Blower Scroll, Wheel and
Motor
Burner Cup and Orifice
Hot-Surface Igniter
Thermostat
Check for gas leaks. See Page 40, Section 9.
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.
Clear of obstructions (even spider webs will cause problems).
Carefully remove any dust and debris from the burner.
Replace if cracked or broken.
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 The grille must be securely attached.
Grille (optional)
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.
Lower Clearance Shield
(optional)
Make sure shield is installed correctly and secured in place if necessary.
(Decorative grille only.) See Page 32, Section 7.5.2.
The lower 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.
Wall Tag
Safety Labels
See Page 31, Section 7.4.
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.
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
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
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.
WARNING
Fire Hazard
Keep all flammable
objects, liquids and
vapors the minimum
required clearances to
combustibles away
from heater.
Explosion Hazard
Turn off gas supply to
heater before service.
Burn Hazard
Allow heater to cool
before service.
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Tubing may still be hot
Edges are sharp.
after operation.
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.
48
SECTION 12: TROUBLESHOOTING
12.1 Honeywell SmartValve® II Troubleshooting
This heater is supplied with the Honeywell SmartValve® 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 powered, unless some abnormal event
has occurred.
2 Flashes
Pressure switch remains closed longer 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.
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 circuit is not functioning properly. Perform the checks following the "Does
the burner stay lit?" bubble in the troubleshooting flow chart on Page 50,
Section 12.2.
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.
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.
49
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
12.2 Troubleshooting Flow Chart
50
SECTION 12: TROUBLESHOOTING
51
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
12.3 Manifold Gas Pressure Setting
Orifice
Top View of Heater
Manometer
6
5
4
3
2
1
0
1
2
3
4
5
6
Natural
52
3.5"
6
5
4
3
2
1
0
1
2
3
4
10.5"
5
6
Propane
SECTION 13: REPLACEMENT PARTS
SECTION 13: REPLACEMENT PARTS
WARNING
DANGER
Electrical Shock Hazard
Explosion Hazard
Fire Hazard
Carbon Monoxide Hazard
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.
53
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
Motor and Blower Assembly
Blower Inlet Gasket
Door Switch
Burner Cup
Assembly
Mica Window
Assembly
Orifice
Air Adapter
Collar
Gas Valve
Hot Surface
Igniter
Pressure Switch
SmartValve R II
Flame Sensor
Jumper Wire
Tube Gasket
Thermostat
Connection
Transformer
54
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
CTH2-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
SECTION 14: GENERAL SPECIFICATIONS
14.1 Material Specifications
14.1.1 Reflectors
14.3 Suspension Specifications
.024 Aluminum
(optional .024 Stainless Steel Type 304)
14.4 Controls Specifications
Hang heater with materials with a minimum working
load of 75 lbs (33 kg). See Page 14, Figure 14.
Time switches, thermostats, etc. can be wired into
the electrical supply. External controls supplied as an
optional extra.
14.2 Heater Specifications
14.2.1 Ignition
Honeywell® SmartValve® II combines gas valve and
hot surface electronic ignition control. Fully automatic, four-try, 100% shut-off, prepurge, auto reset,
LED indicator status.
General Specifications for the heaters are as follows:
End View
Side View
Minimum Length "A"
Reflector
13.5"
(34 cm)
9.5"
(24 cm)
Burner Tube
17.5"
(44 cm)
Turbulator
(Select Models)
Recommended
Minimum Mounting Height*
Heat Input Rate
Length “A”
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)
*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:
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
GAS INLET PRESSURE:
Natural Gas:
for 40,60,80,100,125,150
for 175
4.6" wc Minimum
5.0" wc Minimum
14.0" wc Maximum
LP Gas:
11.0" wc Minimum
14.0" wc Maximum
ELECTRICAL RATING (ALL MODELS):
120 V - 60 Hz., 1.0 A (run) 5.0 A (Start)
SECTION 15: THE ROBERTS GORDON® VANTAGE® II WARRANTY
SECTION 15: THE ROBERTS GORDON® VANTAGE® II WARRANTY
Roberts-Gordon is not permitted to inspect the damaged
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® VANTAGE® II in any way.
• Use of the ROBERTS GORDON® VANTAGE® 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®
VANTAGE® II as directed in the Installation, Operation
and Service manual.
• Relocation of the ROBERTS GORDON® VANTAGE® II
after initial installation
• The use of the ROBERTS GORDON® VANTAGE® II in
a corrosive atmosphere containing contaminants.
• The use of the ROBERTS GORDON® VANTAGE® II in
the vicinity of a combustible or explosive material.
• Any defect in the ROBERTS GORDON® VANTAGE® II
arising from a drawing, design, or specification supplied by or on behalf of the consumer.
• Damage incurred during shipment. Claim must be filed
with carrier.
WARRANTY IS VOID IF:
The ROBERTS GORDON® VANTAGE® II is not installed
by a contractor qualified in the installation and service of
gas fired heating equipment.
You 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® VANTAGE® II
is moved or transferred. This warranty is nontransferable.
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. Box 44
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.
57
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