Roberts Gorden CTH2 Series Installation, Operation And Service Manual

Low-Intensity Infrared Heating Systems

Gas Specs:

QTY.

Job:

Location:

Engineer:

Date:

MODEL NO. CTH2

Submittal: CTH2 Series

UNIT INPUT BTU/HR

QTY.

QTY.

QTY.

MODEL NO. CTH2
MODEL NO. CTH2
MODEL NO. CTH2

UNIT INPUT BTU/HR

UNIT INPUT BTU/HR

UNIT INPUT BTU/HR

TOTAL INPUT BTU/HR

Important

Before installation and operation of heating equipment, read and understand the

Installation, Operation and Service Manual.

ROBERTS GORDON
the installation and service of gas-fired heating equipment.

Roberts-Gordon Roberts-Gordon

P.O. Box 44 Grimsby, Ontario L3M 1R6
Buffalo, New York 14240-0044 Canada
Telephone: [phone] Telephone: [phone]
Fax: [phone] Fax: [phone]
Toll Free: 800.828.7450

www.rg-inc.com

Applications, engineering and detailed guidance on systems design, installation and product performance is available upon request.

®

products are to be installed only in accordance with local laws, codes and regulations, and only by a contractor qualified in

1250 William Street 76 Main Street West, Unit 10

© Copyright 2004 Roberts-Gordon P/N130600NA 03/04

TABLE OF CONTENTS

STANDARD PARTS LIST............................................. 1

Contents of CTH2-Series Burner Carton................. 1

Contents of Core and Extension Packages............. 1

GENERAL SPECIFICATIONS ......................................2

Material Specification .............................................. 2

Reflectors ................................................................ 2

Heater Specifications............................................... 2

Ignition ..................................................................... 2

Suspension Specifications....................................... 2

Controls Specifications ............................................2

Gas Pressure at Manifold ........................................ 2

Pipe Connection ...................................................... 2

Dimensions.............................................................. 2

Gas Inlet Pressure................................................... 2

Electrical Rating (all Models) ................................... 2

CLEARANCES TO COMBUSTIBLES .......................... 3

Standard Reflector................................................... 3

One Side Reflector .................................................. 3

Two Side Reflectors ................................................ 3

45° Tilt Reflector ...................................................... 4

U-Tube, Standard Reflector..................................... 4

U-Tube, Full 45° ......................................................4

U-Tube, Opposite 45° Reflector .............................. 5

2-Foot Deco Grille, 1-Foot Deco Grille and

Protective Grille ....................................................... 5

Lower Clearance Shield ..........................................5

Venting .................................................................... 6

CTH2-Series ASSEMBLY OVERVIEW ........................ 7

Major Component Descriptions .................................7

CTH2-Series Linear Assembly Overview .................8

HEATER INSTALLATION ............................................. 9

Critical Hanger Placement......................................... 9

CTH2-Series Linear Layout Overview....................... 10

Burner Tube Installation ............................................ 12

Tube Clamp Package Installation.............................. 13

Coupling and Tube Assembly ...................................13

Turbulator Installation ................................................ 15

Reflector Installation .................................................. 15

Reflector, U-Clip and Reflector Support Installation..16

Burner Installation ..................................................... 17

OPTIONAL HEATER ACCESSORIES..........................18

CTH2-Series U-Tube Assembly Overview ............... 18

CTH2-Series U-Tube Layout Overviews .................. 19

Elbow Package Configuration ................................... 21

Elbow Installation ...................................................... 21

Reflector Joint Installation ......................................... 21

Reflector Joint Detail ................................................. 22

REFLECTOR SIDE EXTENSION ..................................23

Bracket Installation ....................................................23

Side Reflector Installation ..........................................23

LOWER CLEARANCE SHIELD INSTALLATION .........24

Shield Support Strap Assembly .................................24

TWO-FOOT DECORATIVE GRILLE INSTALLATION..24

Grille Installation ........................................................24

Frame Shield Installation ...........................................25

Reflector Side Extension Installation ........................25

ONE-FOOT DECORATIVE GRILLE INSTALLATION ..26

One-Foot Decorative Grille Bracket ...........................26

Decorative Grille ........................................................26

Joint Piece and Reinforcement ..................................26

End Piece and Reflector End Cap .............................27

90° Elbow...................................................................27

PROTECTIVE GRILLE INSTALLATION .......................28

Silicone Cap Installation ............................................28

Grille End Cap Installation .........................................28

Grille Installation ........................................................28

VENTING........................................................................29

Horizontal Ventilation 4" (10 cm) Pipe .......................29

Vertical Ventilation 4" (10 cm) Pipe ...........................29

Common Sidewall Venting.........................................30

Common Vertical Venting .........................................31

OUTSIDE COMBUSTION AIR SUPPLY .......................32

Vertical Outside Air Supply for

Single Heater Installation ...........................................32

Horizontal Outside Air Supply for

Single Heater Installation ...........................................32

Vertical Outside Air Supply for

Double Heater Installation .........................................33

Horizontal Outside Air Supply for

Double Heater Installation .........................................33

GAS PIPING...................................................................34

Gas Connection with Stainless Steel

Flex Connector .........................................................34

WIRING ..........................................................................35

Line Voltage Thermostat Wiring ................................35

Low Voltage Thermostat Wiring.................................36

Low Voltage Thermostat Wiring with

Multiple Burners .........................................................36

CTH2-Series Internal Wiring ......................................37

CTH2-Series Ladder Diagram ...................................37

Electrical Connection to the Burner ...........................38

INTERNAL BURNER DIAGRAM...................................39

THE ROBERTS GORDON

WARRANTY...................................................................40

®

VANTAGE® II LIMITED

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.

© 2004

Printed in U.S.A.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

STANDARD PARTS LIST

Contents of CTH2-Series Burner Carton

Part No. Description CTH2-40 CTH2-60 CTH2-80 CTH2-100 CTH2-125 CTH2-150 CTH2-175

030XXXXX CTH2 Burner Assembly (Rate and Fuel Varies) 1 1 1 1 1 1 1

02568200 Gasket 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 Gas Connector Assembly - 1/2" NPT 1 1 1 1 1

91412203 Flexible Gas Connector Assembly - 3/4" NPT - - - - - 1 1

03051503 Turbulator Adapter 1 1 1 1 - - -

03051504

Turbulator 2.5

'

(76 cm) Aluminized Steel

03051505 Turbulator 2.5’ (76 cm) Stainless Steel 1 - - - - - -

2442---

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

'

(3m)

Tube, HT Aluminized, 10' (3m)

Burner Tube, ALUMI-THERM® Steel, 10' (3m)

Burner Tube, HT ALUMI-THERM® Steel, 10' (3m)

01312700 Coupling Assembly 1 2 3 - 1 2 3 1 2 3 4 1 2 3 4

02750303

Standard Reflector, 8

'

(3.5m)

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

20

'

30

'

40

'

10

'

20

'

30

'

40

'

10

'

20

'

30

'

40

'

10

'

20

'

30

'

(6m)

(9m)

(12m)

(3m)

(6m)

(9m)

(12m)

(3m)

(6m)

(9m)

(12m)

(3m)

(6m)

(9m)

40

(12m)

123- - - -1234- - - -

----123----1234

111-111--------

---1-----------

346234623462346

'

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

CP20HRS

CP30HRS

CP40HRS

CP10ALUM

CP20ALUM

CP30ALUM

EXP10HRS

CP40ALUM

EXP20HRS

EXP30HRS

EXP40HRS

EXP10ALUM

EXP20ALUM

EXP30ALUM

EXP40ALUM

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

GENERAL SPECIFICATIONS
Material Specification

Reflectors

.024 Aluminum

Heater Specifications
Ignition

Fully automatic hot-surface ignition with safety

Suspension Specifications

Hang heater with materials with a minimum working
load of 75 lbs (33 kg).

Controls Specifications

Time switches, thermostats, etc. can be wired into
the electrical supply. External controls supplied as an
optional extra.

shut-off.

General Specifications for CTH2-Series heaters are as follows:

End View

13.5"

(34 cm)

9.5"

(24 cm)

Side View

Reflector

Burner Tube

17.5"

(44 cm)

Maximum or Minimum Length "A"

Turbulator

(select models)

Heat Input

Rate

Length “A”

Minimum Mounting Height*

Recommended

Model (BTUH X1000) Minimum Maximum Space Spot

CTH2-40 40 10' (3m) 10' (3m) 8'-10' (2.4 - 3m) 8' (2.3m)

CTH2-60 60 20' (6m) 20' (6m) 10'-12' (3 - 3.6m) 9' (2.7m)'

CTH2-80 80 20' (6m) 30' (9m) 12'-15' (3.6 - 4.5m) 11' (3.3m)

CTH2-100 100 30' (9m) 40' (12m) 12'-15' (3.6 - 4.5m) 12' (3.7m)

CTH2-125 125 40' (12m) 50' (15m) 15'-20' (4.5 - 6m) 15' (4.6m)

CTH2-150 150 50' (15m) 60' (18m) 20'-25' (6 - 7.6m) 20' (6.1m)

CTH2-175 175 60' (15m) 70' (21m) 25' (7.6m) 23' (7m)

Gas Pressure at Manifold

Natural Gas: 3.5" w.c.
LP Gas: 10.5" w.c.

Pipe Connection

1/2" NPT (for CTH2-40, 60, 80, 100, 125)
3/4" NPT (for CTH2-150 & 175)

Dimensions

Vent Connection Size: 4" (10 cm)
Outside Air Connection Size: 4" (10 cm)

Natural Gas:
for CTH2-40,60,80,100,125,150 4.6" w.c. Minimum
for CTH2-175 5.0" w.c. Minimum

14.0" w.c. Maximum

LP Gas: 11.0" w.c. Minimum

14.0" w.c. Maximum

Electrical Rating (all Models)

120V - 60 Hz., 1.0 Amp (run) 5.0 Amp (Start)

Refer to figure above for dimensional information.

Gas Inlet Pressure

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

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.

3. “-” indicates an unapproved application. Roberts-Gordon prohibits the installation of
this heater for all unapproved applications.

Standard Reflector

Model ABCDABCD

A

C

B

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

(inches) (centimeters)

One Side Reflector

A

C

B

Two Side Reflectors

A

C

B

(inches) (centimeters)

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

D

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

(inches) (centimeters)

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

D

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

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

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.

3. “-” indicates an unapproved application. Roberts-Gordon prohibits the installation
of this heater for all unapproved applications.

°

Tilt Reflector

45

A

C

B D

UBMITTAL SHEET

(inches) (centimeters)

Model A B C D A B C D

CTH2-40 8 8 51 46 21 21 130 117

CTH2-60 8 8 60542121153138

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

U-Tube, Standard Reflector

A

C

U-Tube, Full 45

B

°

A

C

DB

D

(inches) (centimeters)

Model A B C D A B C D

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

(inches) (centimeters)

Model A B C D A B C D

CTH2-40 - - - - - - - -

CTH2-60 8 8 60422121153107

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

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

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.

3. “-” indicates an unapproved application. Roberts-Gordon prohibits the installation
of this heater for all unapproved applications.

U-Tube, Opposite 45

A

C

B D

UBMITTAL SHEET

°

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

2-Foot Deco Grille, 1-Foot Deco Grille and Protective Grille

(inches) (centimeters)

Model ABCDABCD

A

C

B

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

Lower Clearance Shield*

(inches) (centimeters)

A

C

B

D

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

CTH2-175 - - - - - - - -

*When installed in the first 20’ (6 m).

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

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.

3. “-” indicates an unapproved application. Roberts-Gordon prohibits the installation of
this heater for all unapproved applications.

Venting

A

E

Unvented

Infrared Tubes

Vented

UBMITTAL SHEET

Vent
Pipes

F

(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

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

CTH2-Series ASSEMBLY OVERVIEW
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.
Minimum overlap is
7” (18 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 heat
exchanger tube.

Vent Adapter

Reflector Support Strap &
Wire Form

Flex Gas Line with
Shut Off Cock

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

Turbulator

Turbulator must
be installed in the last
standard section of tube.
Turbulator is not required on the
CTH2-125/150/175.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

CTH2-Series Linear Assembly Overview

U-Clips

Turbulator

Tube

with select models

Vent Adapter

Reflector

Reflector End Cap

Burner

Burner Tube

Package

Tube Clamp

Coupling

Reflector Support

Tube and Reflector Hanger

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

HEATER INSTALLATION
Critical Hanger Placement

Typical Suspension Details

24" min.*

(61 cm)

Beam Clamp

Rod (3/8")

X*

Turnbuckle

Not Included

S Hooks

Concrete Beam

Anchor

Locknut

Screw Hook
(3/8")

Chain size

3/16" minimum

Washers

S Hooks

* Allows for thermal expansion of system

Wood Beam

Side View

Hanger

Reflector

Must Be Within 4" (10 cm) Front View

Description Part Number

S-Hook 91907302
Tube/Reflector Hanger 03090100

Hanger

45° Angle

Run Length Typical Expansion Minimum “X” Length

10’ - 50’ ±1” (3 cm) 12”
51’ - 60’ ±2” (5 cm) 18”
61’ - 70’ ±3” (8 cm) 24”

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

CTH2-Series Linear Layout Overview

LEGEND

Burner

b

c

g

d

Reflector

Tube

Tube/Reflector
Hanger

Coupling
Assembly

Vent Adapter

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

f

CTH2-40

f

CTH2-60
CTH2-80

f

CTH2-80
CTH2-100

10' Tube Length

b

c

g

g

de

20' Tube Length

b

c

de

30' Tube Length

e

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

f

CTH2-100
CTH2-125

b

c

g

de

40' Tube Length

e e

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

CTH2-Series Linear Layout Overview (Continued)

b

c

g

f

de

e e e

CTH2-125
CTH2-150

f

CTH2-150
CTH2-175

f

50' Tube Length

b

c

g

de

e e e e

60' Tube Length

b

c

g

de

e e e e e

b

CTH2-175

© 2004 Roberts-Gordon

70' Tube Length

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

Burner Tube Installation

S Hook

Hanger

UBMITTAL SHEET

NOTE:

Tubing requires a downward
slope of 1/2" (13 mm)
per 20' (6 m) away
from burner.

Offset mounting
hole must be
to the top

Burner Tube

7' 6" ± 1'

(229 cm ± 25cm)

Description Part Number

Burner Tube 03051XXX
S-Hook 91907302
Tube/Reflector Hanger 03090100

Weld Seam
must be to the
bottom of the tube.

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

Flat
Washer

Nut
(Torque 120 in/lb

13.56 Nm)

Tube Clamp

Bolt

UBMITTAL SHEET

Tube Clamp Package Installation

Description Part Number
Tube Clamp Package 01318901

Tube Clamp 01396801
Bolt 97113940
Flat Washer 95211600
Nut 92113900

Coupling and Tube Assembly

Close coupling

A

with tab

Open

Closed

Insert tubes into coupling

C

© 2004 Roberts-Gordon

Tube

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

Tab

Orient coupling so that

the impact block is in the

2:00 or 10:00 oclock

positions

Tube

Start Slide bar/Coupling Lock

B

onto coupling

Slide Bar/Coupling Lock

3" (8 cm) to
4" (10 cm)

Tighten coupling to join tubes

D

Tube

Description Part Number

Coupling 01329600
Slide bar/Coupling Lock 01329700
Tube 91409XXX

Wide end

Coupling

Slide Bar/Coupling Lock

Coupling

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

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 A - D until all tubes are assembled.

Coupling and Tube Assembly (Continued)

7' 6" ± 1'

(229 cm ± 25 cm)

10' ± 1'

(305 cm ± 25 cm)

Tube Length

Model

CTH2-40 10’ (3 m) 10’ (3 m)
CTH2-60 20’ (6 m) 20’ (6 m)
CTH2-80 20’ (6 m) 30’ (9 m)
CTH2-100 30’ (9 m) 40’ (12 m)
CTH2-125 40’ (12 m) 50’ (15 m)
CTH2-150 50’ (15 m) 60’ (18 m)
CTH2-175 60’ (18 m) 70’ (21 m)

Minimum Maximum

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

Total Overall
Tube Length

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

Turbulator Installation

Turbulator

2.5' Section

Turbulator
Adapter

Description Part Number

Turbulator Section 1 03051503
Turbulator Section 2 03051504
Tube 91409XXX

Tab

Turbulator must be installed in
the last standard section of
tube. Turbulator is not required
on the CTH2-125/150/175.

T

w

i

s

t

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 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

Reflector Installation

Hanger

NOTE: All tube surfaces must be covered

by a reflector, except for a U-Tube.

Burner Tube

Reflector

Description Part Number

Tube/Reflector Hanger 03090100
Burner Tube 03051XXX
Reflector 02750303

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

Reflector, U-Clip and Reflector Support Installation

The pictorial drawings of the heater construction in
Section are schematic only and provide a general
guideline of where hangers, reflector supports and
U-clips are to be installed.

1. The first reflector after the burner must be affixed in
the middle of the reflector with a reflector support and
tight screws.

Reflector
End Cap

First Reflector

U-Clips

To ensure proper expansion and contraction move­ment of the reflectors, a combination of U-clips and
reflector supports are used. The positioning of reflec­tor supports and U-clips depend on the individual
installation. The following rules must be observed.

Tight

Sheet Metal

Wire Form

Screw

Reflector Support

Strap

Overlap must be a

minimum of 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.

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 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

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

6

"

(16 cm)

Option A

Slip Overlap

Option B

Non-Slip Overlap

Option B

Slip Overlap

Option A

Non-Slip Overlap

U-Clip

(2 clips per
non-slip overlap
inside a hanger)

Reflector
Reflector

Support

Loose screws
loosened 1/16"
(2 mm) to allow
slippage.

Reflector

Tight

screws

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

Burner Installation

Burner

Description Part Number

Bolt 94273914
Burner 030XXXXX
Lock Washer 96411600
Gasket 02568200

Lock
Washer

Gasket

S-Hook

Burner Tube

Bolt
(Torque 120 in/lb

13.56 Nm)

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

OPTIONAL HEATER ACCESSORIES •

CTH2-Series U-Tube Assembly Overview

U-Tube

Support Bracket

Reflector

Support

Burner

Tube Clamp

Package

U-Tube, Standard

12

U-Tube, Full 45°

2

1

U-Tube, Opposite 45°

12

Turbulator

with select

models

Burner

Tube

Tube

Couplings

Tight U-Bolt

12

4" (10 cm) U-Bolt,

secured to Burner Tube

with 1/4" (6 mm)

Lockwashers and

1/4-20 Hex Nuts

Loose U-Bolt

4" (10 cm) U-Bolt,

secured to Bracket with

1/4" (6 mm) Lockwashers

and 1/4-20 Hex Nuts on

top and bottom to

allow for tube expansion

and contraction

U-Bolt
Nut
Lock Washer
Lock Washer
Nut

Reflector

U-Clips

Reflector

End Caps

U-Tube

18" (457 mm)

Center to Center

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

CTH2-Series U-Tube Layout Overviews

LEGEND

Burner

Reflector

Tube 10'

Tube 5' **

Tube/Reflector
Hanger

Coupling
Assembly

U-Tube

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

CTH2-60
CTH2-80

CTH2-80
CTH2-100

b

c

g

e

h

20' Tube Length*

b

c

g

d

f

h

30' Tube Length

b

c

g

de

**

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.

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

CTH2-100
CTH2-125

h

40' Tube Length

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

CTH2-Series U-Tube Layout Overviews (Continued)

b

c

g

de

f

CTH2-125
CTH2-150

CTH2-150
CTH2-175

h

50' Tube Length* **

b

c

g

de

e

h

60' Tube Length

b

c

g

de

e

f

CTH2-175

© 2004 Roberts-Gordon

h

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

70' Tube Length**

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

Elbow Package Configuration
Elbow Installation

Description Part Number
Elbow Package 02718702

90° Elbow 01335801
Coupling 01312700
Reflector End Cap 02750800
Reflector Joint Piece 02750900

U-Clip Package 91107720

Elbow Installation

Tube

Coupling

90° Elbow

Reflector Joint Installation

Reflector

Tube

Coupling

Reflector
Joint

Scribe
Contour

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

Flatten Edge

1" (2.5 cm)
maximum

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

Reflector Joint Installation

Reflector Joint Detail

Cut away contour
with tin snips.

Punch/Drill six 3/32" (2 mm) holes

Install Reflector
End Cap

Reflector Joint Detail

Attach Reflector Joint
with six #8 sheet
metal screws

Reflector

Reflector
Joint

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

REFLECTOR SIDE EXTENSION
Bracket Installation

Tube

Description Part Number
Reflector Side Extension Package 02712700

Reflector Side Extension 01368000
Retainer Clips 02751200
Sheet Metal Screws 94118106

Reflector

Tube and Reflector Hanger

Reflector Support

Reflector Side

Extension Bracket

(2 per reflector)

Use additional supports

in high air movement

applications.

Order Separately

Reflector Side Extension 01329910

Side Reflector Installation

#8 x 3/8" Sheet Metal Screw

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

Retainer Clip

(2 per side)

Reflector Side Extension

ROBERTS GORDON® CTH2-Series S

Washers

Screws

Locknuts

UBMITTAL SHEET

LOWER CLEARANCE SHIELD INSTALLATION
Shield Support Strap Assembly

12"

17.1"

(434 mm)

Align pilot holes

(300 mm)

Reflector

Lower Clearance Shield

TWO-FOOT DECORATIVE GRILLE INSTALLATION
Grille Installation

Reflector

Tube

Description Part Number
Lower Clearance Shield Package 01397501

Shield Support Strap 01397500
Lower Clearance Shield 02793000
Locknut #8 92311400
Flat Washer #8 95310800
Screw #8 x 3/8" 93511406

Tube and Reflector
Hanger

© 2004 Roberts-Gordon

Suspended Ceiling Frame

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

61 x 122 cm Aluminum Grille

Description Part Number

Aluminium Grille 2’ x 4’ 91407000

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

Frame Shield Installation

Shield

Reflector Side Extension Installation

NOTE: If the Decorative Grille system is to
be installed in an area with considerable
air movement, it is recommended that one
#8 x 3/8 (3.9 x 9.5mm) sheet metal screw
be installed per reflector extension to
prevent it from blowing over.

A

Description Part Number

Deco Grille Shield 01365900

Cut Relief Notches for Tube
and Reflector Hangers

Insert Screw
here

Reflector Side
Extension

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)

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

Description Part Number

Reflector Side Extension 01370412

ROBERTS GORDON® CTH2-Series S

Spread apart brackets
and install
Decorative Grille.

#8 Sheet Metal Screws

Joint Piece

Reinforcement

Slip joint piece into
support bracket
and fasten to
bracket on one side
of the joint only.

Joint Piece

UBMITTAL SHEET

ONE-FOOT DECORATIVE GRILLE INSTALLATION
One-Foot Decorative Grille Bracket

#8 Sheet Metal Screws

In order to maintain reflector shape, do
not fasten brackets together. Do not
fasten bracket to adjoining reflectors.
Maintain same slipjoint position as
reflectors.

Decorative Grille Bracket

Description Part Number

Bracket 01363003

Decorative Grille

Description Part Number

Decorative Grille 8’ x 1’ 91406700

Joint Piece and Reinforcement

Cut relief notches for
supports and hangers.

2"
Minimum
Bracket
Overlap

Description Part Number

© 2004 Roberts-Gordon

Joint Piece 01365903
Reinforcement 01365902

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

Fasten end piece
to brackets using two
#8 sheet metal screws
and replace reflector end cap.

Insert end piece
between grille and
brackets.

End Piece

Reflector
End Cap

Insert
End Piece
between
grille and
brackets.

Joint Piece

Cut grille bracket at
reflector joint piece.

Grille Brackets

Inside

Corner

Decorative Grille

Brackets

Joint Piece

UBMITTAL SHEET

End Piece and Reflector End Cap

90° Elbow

Description Part Number

End Piece 01365901

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

PROTECTIVE GRILLE INSTALLATION
Silicone Cap Installation

Silicone Cap

Grille
Finger

Grille End Cap Installation

A

Grille

C

Pull outward

Grille Installation

Description Part Number

Grille Section 08050001
Grille End Cap 08050002
Silicone Cap 91915951-6P

B

Grille End Cap

D

Bend up 90°

40 "

(101 cm)

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

Reflector

Final Grille
Section

Grille

Grille
End Cap

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

VENTING
Horizontal Ventilation 4" (10 cm) Pipe

Combustible or

Non-Combustible Wall

Vent Adapter

4" Single Wall Pipe

Vent Terminal

Description Part Number

Vent Terminal (Comb. Wall) 90502100
Vent Terminal (Non-Comb Wall) 02537801-XX
Wall Thimble 90505600

Vertical Ventilation 4" (10 cm) Pipe

Vent Adapter

4" Single Wall Pipe

4" (10 cm) Type "B" vent cap

4" (10 cm) Type "B" vent pipe

Non-Combustible Wall Only

18" Min.

Vent Terminal

Vent Adapter

(if applicable)

4" (10 cm) Single Wall Pipe

Description Part Number

Vent Cap 4" (10 cm) 90502300

18" (46 cm)

Min.

Approved

Thimble

Roof

Flashing

Roof

The last section of vent pipe
passing through the roof or
wall may be Type "B" vent pipe.
All other vent materials in the
building must be single wall
vent pipe.

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

Common Sidewall Venting

Vent Terminal

Tjernlund VH1-6 or Equivalent

Outside Wall

Outside Wall

Vent Adapter

6" Single Wall Pipe

4" Single Wall Pipe

6" Single Wall Pipe

Description Part Number

Vent Terminal 6" (15 cm) 90502101

Sweeping 'T'

Connection

Vent Adapter

Vent Terminal

Tjernlund VH1-6 or Equivalent

Outside Wall

Vent Adapter

Sweeping 'Y'

Connection

4" Single Wall Pipe

4" Single Wall Pipe

Vent Adapter

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

Common Vertical Venting

Type "B" vent cap
(7" or 8" may be used.
These are not available
from Roberts Gordon.)

Type "B" vent pipe

Vent Adapter

4" (10 cm)

Single Wall Pipe

Top View

18" (46 cm)

Min.

The last section of vent pipe
passing through the roof or
wall may be Type "B" vent pipe.
All other vent materials in the
building must be single wall
vent pipe.

D

Roof

Flashing

Roof

Approved

Thimble

(if applicable)

Single Wall Pipe

D Area must equal sum

of open area of

individual vents.

Vent Adapter

4" (10 cm)

Single Wall Pipe

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

OUTSIDE COMBUSTION AIR SUPPLY
Vertical Outside Air Supply for Single Heater Installation

Vent Cap

18" (46 cm)

Min.

Roof

4" (10 cm)

(recommended)

Single Wall Pipe

Band Clamp

(recommended)

Flex Hose

Description Part Number

Vent Cap 4" (10 cm) 90502300

Horizontal Outside Air Supply for Single Heater Installation

4" (10 cm)
Single Wall Pipe

Vent Cap

Wall

Flex Hose

(recommended)

Burner

Burner

Description Part Number

Vent Cap 4" (10 cm) 90502300

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

Band Clamp

(recommended)

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

Vertical Outside Air Supply for Double Heater Installation

Vent Cap

Outside Wall

Outside Wall

6" (15 cm) Single Wall Pipe

Sweeping 'T'

Flex Hose

(recommended)

Band Clamp

(recommended)

Description Part Number

Vent Cap 6" (15 cm) 90502302

4" (10 cm)

Single Wall Pipe

Horizontal Outside Air Supply for Double Heater Installation

6" (15 cm) Single Wall Pipe

Connection

BurnerBurner

Flex Hose

(recommended)

Vent Cap

Description Part Number

Vent Cap 6" (15 cm) 90502302

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

Outside Wall

Flex Hose

(recommended)

Burner

Sweeping 'Y'

Connection

4" (10 cm) Single Wall Pipe

(Seal All Joints)

Burner

Band Clamp

(recommended)

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

GAS PIPING
Gas Connection with Stainless Steel Flex Connector

Shut-Off Valve must be parallel to

Shut-Off Valve

(included with connector)

burner gas inlet. The 2" (5 cm)
displacement shown is for the cold
condition. This displacement may
reduce when the system is fired.

2" (5 cm)

12"

(30 cm)

Hold gas nipple securely
with pipe wrench when
attaching the flex gas
connector.

Failure to follow these
instructions can result in
product damage.

45°

Stainless Steel Flex Gas Connector

Description Part Number

1/2” Flex Gas Line 91412200
3/4” Flex Gas Line 91412203

Horizontal

Rear View

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

WIRING

WARNING

Electrical Shock Hazard

Disconnect electrical power and gas supply before
servicing.

This appliance must be connected
to a properly grounded electrical source.

Failure to follow these instructions can result in
death or electrical shock.

Line Voltage Thermostat Wiring

120V-60Hz

Supply Circuit

L1
L2

Gnd.

Line Voltage

Thermostat

T

Gnd. Gnd.

HN HN

Low voltage
terminal detail
on all burners

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

WARNING

Electrical Shock Hazard

Disconnect electrical power and gas supply before
servicing.

This appliance must be connected
to a properly grounded electrical source.

Failure to follow these instructions can result in
death or electrical shock.

Low Voltage Thermostat Wiring

120V-60Hz

Supply Circuit

L1

HN

L2

Gnd.

Low Voltage Thermostat Wiring with Multiple Burners

Transformer Relay

Black

Purple

Black

120V-60Hz

supply circuit

L1

L2

FRONT VIEW BACK VIEW

1

3

2

456

COIL COIL

White Red

T

Gnd.

RC

W

G

Burner 1 Burner 2

Low voltage

thermostat

Y

Gnd.

NH

Low voltage

terminal detail

Low Voltage Thermostat

P/N 90425100

Low Voltage

Terminal Detail

on all Burners

Gnd.

NH

Gnd.

When using 1-2 burners, use SPDT

Transformer Relay P/N 90417600

When using 3-4 burners, use DPDT

Transformer Relay P/N 90436300

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

Red/Yellow

Burner 3

Gnd.

NH

Burner 4

Gnd.

NH

ROBERTS GORDON® CTH2-Series S

CTH2-Series Internal Wiring

UBMITTAL SHEET

120V-60Hz

supply circuit

L2

L1

Gnd.

MOTOR/BLOWER

BLACK

GREEN

DOOR

SWITCH

TRANSFORMER

WHITE

N.O.

BLACK

1

3

BLACK

GREEN

5

ORANGE

BLUE

4

TO THERMOSTAT

COM

BLACK

TERMINAL

BUSHING

PURPLE

BLACK

WHITE

FLAME

SENSOR

GREY

WHITE

WHITE

WHITE

SMART

VALVE

YELLOW

IGNITER

YELLOW

N.O.

COM

PRESSURE

SWITCH

CTH2-Series Ladder Diagram

L

2

WHITE

WHITE BLACK

ORANGE

BLACK

DOOR

SWITCH

MOTOR

TRANSFORMER

VALVE

WHITE

WHITE

YELLOW

YELLOW

GREY

BLUE

PRESSURE

SWITCH

PURPLE

HOT SURFACE IGNITER

WHITE

WHITE

FLAME
SENSOR

L

TO

THERMOSTAT

1

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

BLACK

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

Electrical Connection to the Burner

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

BX or Romex Connector

Junction Box

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

INTERNAL BURNER DIAGRAM

Burner Cup

Assembly

Mica Window

Assembly

Hot Surface

Igniter

Motor and Blower Assembly

Blower Inlet Gasket

Door Switch

Air Adapter

Collar

Flame Sensor

Tube Gasket

Pressure Switch

Transformer

SmartValve II

R

Jumper Wire

P/N 03090900

Thermostat
Connection

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AN D REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.

ROBERTS GORDON® CTH2-Series S

UBMITTAL SHEET

THE ROBERTS GORDON® VANTAGE® II LIMITED
WARRANTY

ROBERTS-GORDON WILL PAY FOR:

Within 42 months from date of shipment from Roberts­Gordon, replacement parts will be provided free of
charge for any part of the controller which fails due to a
manufacturing or material defect.

Roberts-Gordon will require the part in question to be
returned to the factory. Roberts-Gordon 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 18 months from date of
shipment from Roberts-Gordon 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

®

VANTAGE® II in any way.

®

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 GOR-

®

DON

VANTAG E® 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

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
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® VANTAG E® II is not installed
by an 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
is moved or transferred. This warranty is nontransferable.

Roberts-Gordon is not permitted to inspect the damaged
controller and/or component parts.

®

VANTAGE® II

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 Roberts­Gordon:

U.S.A.

1250 William Street
P. O . B o x 4 4
Buffalo, New York 14240-0044

716.852.4400

Canada

76 Main Street West, Unit 10
Grimsby, Ontario L3M 1R6

905.945.5403

On the web at: www.rg-inc.com

Roberts-Gordon'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 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, 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's duly authorized
Executive Officer.

© 2004 Roberts-Gordon

APPLICATIONS, ENGINEERING AND DETAILED GUIDANCE ON SYSTEMS DESIGN, INSTALLATION AND PRODUCT PERFORMANCE IS AVAILABLE UPON REQUEST. ROBERTS GORDON® PRODUCTS ARE TO BE
INSTALLED ONLY IN ACCORDANCE WITH LOCAL LAWS, CODES AND REGULATIONS, AND ONLY BY A CONTRACTOR QUALIFIED IN THE INSTALLATION AND SERVICE OF GAS-FIRED HEATING EQUIPMENT.