Roberts Gorden CARIBE GTH User manual

A Note from Roberts Gordon . . . . . . .1
Heater Safety . . . . . . . . . . . . . . . . . . . .2
Introduction . . . . . . . . . . . . . . . . . . . . .3
Installer Responsibility . . . . . . . . . . . .5
Before Using the Heater . . . . . . . . . . .6
Using the Heater . . . . . . . . . . . . . . . .12
Caring for the Heater . . . . . . . . . . . . .20
Owner Warranty . . . . . . . . . . . . . . . . .23
Index . . . . . . . . . . . . . . . . . . . . . . . . . .24
Use and Care Manual
Gas-Fired, Overhead Infrared Tube Heater
for Residential Garages and Light Industrial/Commercial Applications
© P/N 180101 NA Original Issue 08/97
Installation, Service and Annual
Inspection must be done by a licensed
gas fitter or contractor.
Failure to follow these instructions can
result in death, injury or property damage.
WARNING Installer:
Please give this manual to the owner.
Owner:
Please take the time to read and understand
these instructions prior to using the heater.
Keep this manual in a safe place should you
have questions or require service.
Roberts-Gordon
1250 William Street
P.O. Box 44
Buffalo, New York 14240-0044
Telephone: [phone]
Fax: [phone]
Toll Free: 800.828.7450
http://www.rg-inc.com
Roberts-Gordon Canada Inc.
241 South Service Road West
Grimsby, Ontario L3M 1Y7 Canada
Telephone: [phone]
Fax: [phone]
GTH

©1997
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 written permission of
Roberts-Gordon, Inc. CARIBE®is a trademark of Roberts-Gordon, Inc.
Roberts-Gordon®is a registered trademark of Roberts-Gordon, Inc.
Printed in U.S.A.
A Note from Roberts-Gordon
Thank you for purchasing a Roberts-Gordon heating product. We are pleased you have chosen the
CARIBE®GTH overhead tube heater. In addition to the quality you receive from our company, you also receive
over 30 years of infrared heating experience.
For years of trouble-free operation from your heater, carefully read this Use & Care Manual. This Manual
contains valuable information to help you use the heater safely and properly.
To obtain warranty service, please complete and mail the Owner Warranty Registration Card immediately. In
addition to activating your warranty, registering your heater enables us to contact you with safety and product
updates.
Keep this manual in a safe place in case you have any questions or require service in the future. Also, since proof
of purchase is required to obtain warranty coverage, keep the original sales receipt in a safe place. Remember to
record the model and serial numbers of your heater below. Model and serial numbers are found on the rating tag
affixed to the heater. See page 14 for rating tag location.
Model Number: Serial Number: Fuel: Date of Installation:
Installed By: Purchased From (If different than Installer):
Name Name
Company Company
Address Address
Phone Phone
Fax Fax
If you have questions or need assistance, please contact Roberts-Gordon at the following:
United States Canada
1250 William Street 241 South Service Road, West
Buffalo, New York 14206 Grimsby, Ontario, Canada L3M 1Y7
Phone: [phone] Phone: [phone]
Fax: [phone] Fax: [phone]
Monday - Friday
8:15 a.m. - 4:45 p.m.
(Eastern time)
1

2
CARIBE®GTH SERIES HEATER
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.
Heater Safety
Your safety
is important
to us
Do not use heater in an area containing corrosive chemicals. The use of these
chemicals should be avoided to ensure a longer life of the burner, tubing and other
parts. See page 20.
• Do not store or use flammable objects, liquids or vapors in the vicinity of the
heater or any other appliance. See page 13.
• WHAT TO DO IF YOU SMELL GAS:
• Do not try to operate heater.
• Do not touch any electric switch; do not use any phone in your home or building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
Failure to follow these instructions can
result in death, injury or property damage.
• Read this manual carefully before using the heater.
• Plug the heater into a grounded three-prong ceiling outlet. See page 17.
• Do not install or service any part of the heater. Installation, Service and Annual
Inspection must be done by a licensed gas fitter or contractor.
• Installer must exhaust heater outside. See page 18.
• Keep all persons, especially children, away from the heater. See page 15.
• Keep the heater out of the weather. The heater is for indoor areas such as
residential garages, workshops, hobby greenhouses, small warehouses, service
centers or lobbies. Do not use the heater in living or sleeping areas such as a
bedroom or basement.
Failure to follow these instructions can
result in death, injury or property damage.
Failure to follow these instructions can
result in property damage.
WARNING
CAUTION
WARNING

Introduction
3
ROBERTS-GORDON
Headquartered in Buffalo, New York, USA, Roberts-Gordon is
an international manufacturer of low-intensity and high-
intensity gas-fired infrared heaters. Since 1962, our products
have heated thousands of commercial and industrial
applications from airplane hangars to manufacturing facilities
to retail outlets.
We’ve taken our vast experience and knowledge from all of
the big jobs and created an efficient, economical heater for
the small jobs - the CARIBE®GTH. For hard-to-heat areas
like those found in residential garages and light industrial
buildings, infrared heat provides the ideal alternative for
warmth and comfort.
The CARIBE®GTH is a factory-assembled, gas-fired, low-
intensity heating system that incorporates a balanced flue.
The system has been designed for easy installation and will
provide years of economical operation and trouble-free
service. Not only is infrared heat efficient, it also provides the
most comfortable conditions in open areas, such as garages.
Gas-Fired means it uses clean-burning Natural or LP gas.
Low-Intensity means that the radiant surface of the heat
exchanger tube does not glow red. Instead, it operates at a
temperature of less than 1000°F and radiates energy at a lower
intensity per square foot of radiating surface. The lower
temperature and intensity levels are within a range that is most
effective in establishing and maintaining personal comfort
levels. An aluminum reflector directs the radiant energy
downward, bathing people and objects below in warmth.
Balanced Flue means that the burner draws combustion air
from outdoors and exhausts harmful emissions to the outdoors
through the same opening.
Radiant refers to the energy radiated by the CARIBE®GTH
heater. Because the energy is in the form of infrared rays, it
does not directly heat the air. Instead, the rays heat objects
such as the floor, cars, machines and people. The warm
objects, in turn, heat the air.
These combined features are the key to the exceptional
comfort and fuel efficiency provided by the CARIBE®GTH
heater.
About the
Company
About the
Heater

Introduction
4
CARIBE®GTH SERIES HEATER
Reflector
Heat Exchanger Tube
Burner Box
Front Fixed Hanger
Rear Movable Hanger
Service Door
Venting
Wall Termination Plate
Gas Line
- Rear View -
Thermostat
Connection
Power Cord
Gas Line
Venting
Burner Box Contains the electrical components and gas distribution components that make
the heater work. There are no owner-serviceable items in this box.
Front Fixed Hanger Provides rigid support and mounting surface for the reflector.
Reflector Made from formed aluminum and reflects the radiant energy downward, bathing
people and objects below.
Heat Exchanger Tube U-shaped tube through which the heated air and products of combustion pass.
Rear Movable Hanger Provides support for the heat exchanger and reflector at the end that is furthest
from the burner box. The support may be moved (within limits) to accommodate
hanging of the unit. See page 16 for limits.
Service Door Used only by a licensed contractor for access to the electrical and gas distribution
components.
Gas Line Must only be installed and serviced by a licensed contractor or gas fitter.
Wall Termination Plate Placed on the outside wall over the venting.
Venting Installer must properly exhaust the heater outside. The 5” outer duct carries fresh air
to the burner. The 3” inner duct carries the products of combustion to the outside.
Thermostat 24 Volt Thermostat mounted with Safety Tag.
Power Cord Three-prong plug that must be connected to a dedicated and properly grounded
three-prong ceiling outlet.
Protective Grille Included with select models. See page 15 for details.
CaribeGTH
Fire Hazard
Some objects will catch
fire or explode when
placed close to heater.
Keep all flammable
objects, liquidsand
vapors the required safe
distances away from
heater .
Failure to follow these
instructions will result in
death, injury or property
damage.
Risque d’incendie
Certains objets placés
près du radiateur peu-
vent s’enflammer ou
exploser.
Tenir tous les objets,
liquides et vapeurs
inflammables à la
distance de sécurité
requise du radiateur.
Le non-respect de ces
consignes peut causer
mort, blessures ou dom-
mage matériel.
Minimum Required Safe Distances from Combustibles (inches)*
Distances de sécurité requises loin des combustibles (pouces)**
D
B
A
C
6"Min
24"Min
ATTENTION
by
P/N 91037903
MONTER LE
THERMOSTAT ICI
MOUNT
THERMOSTAT
HERE
Approx.45°
24"Min
A
F
G
E
Model/
Modéle A B C D E F
CGTH-30 4 16 36 28 34 6
CGTH-40 4 18 48 30 34 6
CGTH-50 4 20 48 32 36 6
Know your model number. Model
number is found on the Rating Tag
(See side view drawing for location
of Rating Tag).
* All dimensions are from the reflector.
** Toutesles dimensions sont mesurées à partir du réflecteur.
Horizontal Mount
Montage Horizontal
45ºMount
Montage à 45º
WARNING
This thermostat controls your overhead tube heater. Read your Use and Care Manual and follow all Safety
Requirements which include checking your heater monthly. Installation, Service and Annual Inspection must be
done by a licenced gas fitter or contractor. Please call us at [phone] if you need a manual or have questions.
Ce thermostat contrôle votre radiateur tubulaire de plafond. Lire le manuel d’utilisation et d’entretien et
respecter toutes les conditions de sécurité, notamment la vérification mensuelle du radiateur. L’installation, la
réeparation et l’inspection annuelle doivent être effectuées par un ajusteur-gazier ou un entrepreneur agréés.
Thermostat and
Safety Tag
Protective Grille
Off
50 7
0
60 8
0
- Rear View -
Service Door
Gas Line
Wall Termination Plate
Venting
Burner Box
Front Fixed Hanger
Reflector
Heat Exchanger Tube
Rear Movable
Hanger
Power Cord
Thermostat
Connection
Gas Connection
Venting

Installer Responsibility
5
ROBERTS-GORDON
Installation, Service and Annual Inspection must be
done by a licensed gas fitter or contractor.
Failure to follow these instructions can result in death,
injury or property damage.
• To install the heater, as well as the gas and electrical supplies, in accordance with
applicable specifications and codes. Roberts-Gordon recommends installer contact local
building inspectors or Fire Marshals for guidance.
• To use the information in the manual together with the cited codes and regulations to
perform the installation.
• To install the heater in accordance with the Minimum Required Safe Distances from
Combustibles.
• To exhaust the heater outside.
• To furnish all needed materials not furnished as standard equipment.
• To see that the materials and installation methods used result in a job that is workmanlike
in appearance and is in compliance with all applicable codes and requirements of the
Installation Manual.
• To give the Use and Care Manual as well as the Installation Manual to the owner.
Roberts-Gordon wants you, the owner, to be aware of the Installer’s Responsibility as stated
in the Installation Manual. The Installer’s Responsibility is:
WARNING

6
CARIBE®GTH SERIES HEATER
Before Using the Heater
The following information is included in the Installation Manual and applies to the installer at
the time of installation. The warnings are included on the product. Because your safety is
important to us, we include these warnings for your information. If you find your heater is
not installed according to these warnings and codes, immediately contact the installer.
This section provides the following information:
• Defines the gas, electric and venting requirements for the
CARIBE®GTH heater.
• Specifies the national standards and applicable codes that
apply to the gas, electric and venting requirements.
• Specifies the national standards and applicable codes that
apply to non-residential installations.
System
Requirements
Gas Service
Inlet Connection
Connection: 3/8" Male NPT
Inlet Pressure
Natural Gas:
Minimum - Inlet 5.0” w.c.
Maximum - Inlet 14.0” w.c.
LP Gas (propane):
Minimum - Inlet 11.0” w.c.
Maximum - Inlet 14.0” w.c.
Manifold Pressure
Natural Gas: 3.5” w.c.
LP Gas (propane): 10.5” w.c.
Type of Gas
The type of gas appearing on the nameplate must be the type of
gas used. Installation must comply with local codes and
recommendations of the local gas company. United States: Refer
to National Fuel Gas Code, ANSI Z223.1 - latest revision, (same as
NFPA Bulletin 54). Canada: Refer to Can 1-B149.1 and B149.2:
Installation Codes for Gas Burning Appliances.
System
Requirements

Before Using the Heater
7
ROBERTS-GORDON
The size of the gas supply lines must comply with local codes and
recommendations of the local gas company. United States: Refer
to National Fuel Gas Code, ANSI Z223.1 - latest revision, (same as
NFPA Bulletin 54). Canada: Refer to Can 1-B149.1 and B149.2:
Installation Codes for Gas Burning Appliances.
A 1/8” NPT plugged tap must be installed in the gas line connection
immediately upstream of the burner that is farthest from the gas
supply meter. The tap is required for checking system gas
pressure.
Gas Supply
Lines
Meter and service must be large enough to handle all the heaters
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" w.c. When gas piping is not
included in the layout drawing, the local gas supplier will usually
help in planning the gas piping.
Meter and
Service

Before Using the Heater
8
CARIBE®GTH SERIES HEATER
Electrical Service
The CARIBE®GTH heater requires a grounded three-prong
electrical outlet to be installed within 18 inches of the rear surface
of the heater’s burner box. It is recommended that the outlet for the
heater be ceiling-mounted and should be on a dedicated circuit.
DO NOT use an electrical extension cord to operate the heater.
Heater Rating: 120 VAC, 60 Hz, Single Phase, 1 Amp
System
Requirements
The heater must be electrically grounded in accordance with the
following codes: United States: Refer to National Electrical Code,
ANSI/NFPA-70 - latest revision. Wiring must conform to the most
current National Electrical Code and local ordinances. Canada:
Refer to Canadian Electrical Code, CSA C22.1 Part 1 - latest
revision.
Grounding
Electrical Shock Hazard
Plug heater into grounded three-prong
ceiling receptacle.
Do not cut or remove the grounding
prong from this plug.
Do not use with an extension cord.
Failure to follow these instructions will
result in death or electrical shock.
Risque d’électrocution
Brancher le cordon du radiateur sur un
socle à 3 broches et à la masse, situé
au plafond.
Ne pas sectionner ou retirer la broche
de masse de cette prise.
N’utiliser aucun câble de rallonge.
Le non-respect de ces consignes peut
entraîner mort ou électrocution.
ATTENTION WARNING
©Printed in the U.S.A P/N 91037500 Rev. A
It is important to note that the CARIBE®GTH heater is controlled by
a low voltage (24 VAC) thermostat supplied with the heater. The
Direct Spark Ignition (DSI) module located inside the burner box
supplies the necessary electrical power to operate the thermostat.
No other electrical power to the thermostat is required.
Thermostat

Before Using the Heater
9
ROBERTS-GORDON
Venting
The CARIBE®GTH Heater must be installed with the venting system
supplied, or with one of the optional venting kits available from
Roberts-Gordon. DO NOT connect this heater to a separate chimney,
and
DO NOT common vent with any other fuel burning appliance.
The CARIBE®GTH Heater employs a balanced flue/air venting duct
system and must conform to the following length requirements:
Maximum Length: 10 feet
Minimum Length: 2 feet - 6 inches
System
Requirements
The location, size, installation and termination of vents, as well as
the minimum required safe distances when penetrating
combustible walls, must comply with local codes and
recommendations of the local gas company. United States: Refer
to National Fuel Gas Code, ANSI Z223.1 - latest revision, (same as
NFPA Bulletin 54). Canada: Refer to Can 1-B149.1 and B149.2:
Installation Codes for Gas Burning Appliances.
Venting Codes
The balanced flue consists of a 3” diameter flue which is
concentrically positioned inside a 5” diameter vent pipe (see
below). The 5” diameter vent supplies outside air that is necessary
for combustion while the 3” diameter flue carries the products of
combustion from the heater, and exhausts them outside.
The balanced flue is applicable for both horizontal and vertical
venting arrangements. Vertical venting will require the optional roof
venting kit available from Roberts-Gordon.
Balanced Flue
Construction
Exterior Wall
Exhaust Heater
Outside Air
Exhaust Gases
Outside Air
Carbon Monoxide Hazard
Heater must be exhausted outside.
Use materials supplied.
Failure to follow these instructions will
result in death or injury.
ATTENTION
WARNING
©Printed in the U.S.A P/N 91037300 Rev. B
Risque de monoxyde de carbone
L'échappement du radiateur doit s'ef-
fectuer à l'extérieur.
Utilisez le matériel fourni.
Le non-respect de ces consignes peut
entraîner mort ou blessures.

10
CARIBE®GTH SERIES HEATER
Before Using the Heater
Non-residential Installations:
The CARIBE®GTH heater may be used in public garages.
Installation in public garages must be in accordance with the
following codes: United States: Standard for Parking Structures
NFPA-88A - latest revision or the Standard for Repair Garages,
NFPA-88B - latest revision. Canada: Refer to Can 1-B149.1 and
B149.2: Installation Codes for Gas Burning Appliances.
• Heaters must be installed a minimum of 8 feet above the floor.
Minimum required safe distances to combustibles must be
maintained from vehicles parked below the heater.
• When installed over hoists, the minimum required safe distances
to combustibles must be maintained from the uppermost point of
the combustible materials placed on the hoist.
Public
Garages
Where there is the possibility of exposure to combustible airborne
material or vapor, consult the local Fire Marshal, the Fire Insurance
Carrier or other authorities for approval of the proposed installation.
Hazardous
Locations
The CARIBE®GTH heater may be used in certain areas of aircraft
hangars. Installation in aircraft hangars must be in accordance with
the following codes: United States: Refer to Standard for Aircraft
Hangars, ANSI/NFPA-409 - latest revision. Canada: Refer to
Standard CGA B149-1-M91 and B149.2.
• Heaters in aircraft storage or service areas must be installed a
minimum of 10 feet above the upper surface of wings or engine
enclosures of the highest aircraft which may be housed in the
hangar. (This should be measured from the bottom of the heater
to the top of the wing, or engine enclosure, whichever is highest
from the floor).
• In other sections of aircraft hangars, such as shops or offices,
heaters must be installed a minimum of 8 feet above the floor.
• Heaters installed in aircraft hangars shall be located so as not to
be subject to damage by aircraft, cranes, movable scaffolding or
other objects.
• When installed over hoists, the minimum required safe distances
to combustibles must be maintained from the uppermost point of
the combustible materials placed on the hoist.
Aircraft
Hangars

Before Using the Heater
11
ROBERTS-GORDON
1. The heater must meet the minimum mounting height
requirement of 7 feet above the floor. For aircraft hangars and
public garages, the heater must meet the minimum mounting
height requirement of 8 feet above the floor
. See page 10.
2. The heater location allows for the minimum required safe
distances from combustibles
(combustibles include vehicles,
wood, gasoline and flammable objects, liquids and vapors).
3. The location of the heater will not restrict motion of
passageway doors or windows.
4. The location will not interfere with operation of the overhead
garage door.
5. The location will provide the best coverage of the total area to
be heated.
6. Consideration be given to the types of vehicles that will be
parked in the garage (cars, vans, boats, RV’s, etc.).
7. The location will allow for the minimum required safe
distances from combustibles with respect to the vehicles
parked in the garage.
8. The location will allow the required utilities (i.e.: gas and
electric) and venting to be installed (maximum vent length is
10 feet).
9. Sufficient clearances will exist to allow for maintenance.
10. Overhead structural members (rafters, beams, etc.) are
accessible for attaching the heater.
Heater
Location
It is the Installer’s Responsibility to choose a suitable mounting location for the heater. The
Installer must follow the guidelines below as stated in the Installation Manual. Before using
your heater, check the location. If the location does not follow these guidelines, do not use
the heater. Immediately contact your installer.

Using the Heater
12
CARIBE®GTH SERIES HEATER
Minimum
Required Safe
Distances
From
Combustibles
Once your heater is installed by a licensed contractor, you must
remember to maintain the minimum required safe distances from
combustibles at all times. Combustibles are materials which may
catch on fire and include many common items such as your
vehicle, wood and wood shavings, paper, rubber, fabric, plastic -
just to name a few. Don’t forget these materials could be in the
form of liquids and vapors and may be airborne, as well.
Combustible materials such as those noted, and any other combustible materials must not
be placed closer to any side of the CARIBE®GTH heater than the distances noted in the
diagrams on the following pages. If you have any questions about the minimum required
safe distances from combustibles, or the associated diagrams, please contact your installer,
Roberts-Gordon representative or distributor, or Roberts-Gordon during normal business
hours which are Monday through Friday, 8:15 a.m. to 4:45 p.m., Eastern Time.
In USA : [phone]
In Canada: [phone]
It is important to keep the minimum required safe distances from combustibles at all times to
avoid death, personal injury or property damage. Clearances from vehicles parked beneath
heaters must be maintained. Signs should be posted to identify any possible violation of the
clearance distances from the heater in the vehicle areas. Maximum allowable stacking height
in storage areas should be identified with signs or appropriate markings. The illustrations and
Table on page 14 specify the minimum required safe distances from combustibles.

Risque d’incendie
Certains objets placés près du radiateur peuvent s’enflammer ou exploser.
Tenir tous les objets, liquides et
vapeurs inflammables à la distance de sécurité
requise du radiateur.
Le non-respect de ces consignes peut causer mort, blessures ou dommage matériel.
Using the Heater
13
ROBERTS-GORDON
Fire Hazard
Some objects can catch fire or explode when placed close to heater.
Keep all flammable objects, liquids and vapors the required safe distances away from
heater .
Failure to follow these instructions can result in death, injury or property damage.
Caribe
GTH
Fire Hazard
Some objects will catch
fire or explode when
placed close to heater.
Keep all flammable
objects, liquids and
vapors the required safe
distances away from
heater
.
Failure to follow these
instructions
will result in
death, injury or property
damage.
Risque d’incendie
Certains objets placés
près du radiateur peu-
vent s’enflammer ou
exploser.
Tenir tous les objets,
liquides et
vapeurs
inflammables à la
distance de sécurité
requise du radiateur.
Le non-respect de ces
consignes peut causer
mort, blessures ou dom-
mage matériel.
Minimum Required Safe Distances from Combustibles (inches)*
Distances de sécurité requises loin des combustibles (pouces)**
D
B
A
C
6" Min
24" Min
ATTENTION
by
P/N 91037903
MONTER LE
THERMOSTAT ICI
MOUNT
THERMOSTAT
HERE
Approx.45°
24"Min
A
F
G
E
Model/
Modéle A B C D E F
CGTH-30 4 16 36 28 34 6
CGTH-40 4 18 48 30 34 6
CGTH-50 4 20 48 32 36 6
Know your model number. Model
number is found on the Rating Tag
(See side view drawing for location
of Rating Tag).
* All dimensions are from the reflector.
** Toutes les dimensions sont mesurées à partir du réflecteur.
Horizontal Mount
Montage Horizontal
45ºMount
Montage à 45º
WARNING
This thermostat controls your overhead tube heater. Read your Use and Care Manual and follow all Safety
Requirements which include checking your heater monthly. Installation, Service andAnnual Inspection must be
done by a licenced gas fitter or contractor. Pleasecall us at [phone] if you need a manual or have questions.
Ce thermostat contrôle votre radiateur tubulaire de plafond. Lire le manuel d’utilisation et d’entretien et
respecter toutes les conditions de sécurité, notamment la vérification mensuelle du radiateur. L’installation, la
réeparation et l’inspection annuelle doivent être effectuées par un ajusteur-gazier ou un entrepreneur agréés.
Thermostat Tag
Important Safety Instructions
• Do not store or use flammable
objects, liquids or vapors in the
vicinity of the heater or any other
appliance.
• Do not hang any objects from or
place any objects on the heater.
• Keep the minimum require safe
distances from vehicles parked
beneath the heater.
• Post signs or appropriate marking
to identify any possible violation of
the minimum required safe
distances.
• Post signs or appropriate markings
to identify maximum allowable
stacking height in storage areas.
Failure to follow these instructions can
result in death, injury or property damage.
The warnings on this page appear on the
heater and are also on the thermostat tag
(shown right) to serve as a constant reminder to
maintain the minimum required safe distances
from combustibles at all times. If you do not
have either the label on your heater or the
thermostat tag, immediately call your installer or
Roberts-Gordon for replacement.
WARNING
Off
50 7
0
60 8
0
WARNING
ATTENTION

Using the Heater
14
CARIBE®GTH SERIES HEATER
Your heater may be installed in one of three ways: horizontal, 45otilt left or 45otilt right.
Since the distances for the tilt installation are the same, the chart only shows one (the 45otilt
left). To determine the minimum required safe distances for your heater, you must know the
mounting type and model number of your heater.
24" Min.
A
B
D
B
C
Horizontal Installations
45oTilted Installations
NOTE: Dimension “C” indicates the
minimum required safe distances
from combustibles, it DOES NOT
indicate the required mounting
height. The minimum mounting
height is 7 feet, except for aircraft
hangars & public garages (see
page 10).
24" Min
A
D
E
A
F
Approx. 45°
NOTE: Dimension “E” indicates the
minimum required safe
distances from combustibles, it
DOES NOT indicate the
required mounting height. The
minimum mounting height is 7
feet, except for aircraft hangars
& public garages (see page 10).
MINIMUM REQUIRED SAFE DISTANCES
Model BTU/Hr A B C D E F
CGTH-30 30,000 4” 16” 36” 28” 34” 6”
CGTH-40 40,000 4” 18” 48” 30” 34” 6”
CGTH-50 50,000 4” 20” 48” 32” 36” 6”
E
A
F
A
24” Min
D
Rating
Tag
Rating
Tag

Using the Heater
15
ROBERTS-GORDON
Roberts-Gordon recommends using the protective grille at all
times. The grille is included with select models of the CARIBE®
GTH heater and is supplied in sections that must be installed on
the underside of the reflector prior to operation. The shorter length
(8 feet) heater requires installation of two protective grille sections,
while the longer heater (11 feet-6 inches) requires three protective
grille sections.
One grille has a formed end panel and is installed at the end of the
reflector that is furthest from the burner box. The other grille has an
open-end and is installed closest to the burner box.
To purchase the protective grille for your heater, please contact
your installer.
Protective
Grille
End View
End View
Burn Hazard
Keep all persons, especially children, away from
heater.
Do not touch any part of the heater.
Heater is very hot.
Failure to follow these instructions can result in injury.
• Do not touch the heater.
• Keep all persons, especially children, away from the heater.
• Use of protective grille (included with select models) is recommended.
Grille with
formed end
panel Grille with
open end
WARNING

Using the Heater
16
CARIBE®GTH SERIES HEATER
Rear Movable
Hanger Limits
The illustration below shows a typical installation of the
CARIBE®GTH heater. The drawing specifies the allowable
range of distance between the front fixed hanger and the rear
movable hanger.
The rear hangar should only be moved if the distance between
both hangers is not within the allowable range.
L Dimension
Model Max. Min.
CGTH-30 60” 72”
CGTH-40 102” 114”
CGTH-50 102” 114”
15"
Burner Box
1" Max.Suspension Points
24"
Minimum
Recommended
for Servicing
6" Min.
X
Reflector
Minium Mounting
Height - 7 feet
Vent Terminal
Exterior Wall
*For minimum mounting height of aircraft
hangars and public garages, see page 10.

Using the Heater
17
ROBERTS-GORDON
To turn off gas
and electric to
the heater
1. Turn on the manual gas valve. Use only your hand to turn the gas
valve handle. Never use tools. If the handle can not turn by hand,
do not try to repair it, call a licensed contractor. Force or attempted
repair can result in a fire or explosion.
2. Turn on electric power to the heater.
To turn on gas
and electric to
the heater
3. Set the thermostat to the desired setting.
4. This heater is equipped with an ignition device which automatically
lights the burner. Do not try to light the burner with a match.
5. If the heater can not operate, follow the instructions ‘To turn off gas
and electric to the heater’ and call a licensed gas fitter or contractor.
1. To turn off gas and electric to the heater, set the thermostat to the
‘OFF’ position.
2. Turn off the manual gas valve.
3. Unplug the heater from the three-prong ceiling receptacle if service is
to be performed.
Electrical Shock Hazard
Unplug the heater before service is done by a licensed installer.
Failure to follow these instructions can result in death or electrical
shock.
To turn off the
heater
1. Set the thermostat to the ‘OFF’ position.
WARNING
Electrical Shock Hazard
Plug heater into grounded three-prong ceiling receptacle.
Do not cut or remove the grounding prong from this plug.
Do not use with an extension cord.
Failure to follow these instructions can result in death or electrical shock.
Risque d’électrocution
Brancher le cordon du radiateur sur un socle à 3 broches et à la masse, situé au plafond.
Ne pas sectionner ou retirer la broche de masse de cette prise.
N’utiliser aucun câble de rallonge.
Le non-respect de ces consignes peut entraîner mort ou électrocution.
WARNING
ATTENTION

Using the Heater
18
CARIBE®GTH SERIES HEATER
As mentioned on page 5, it is the Installer’s Responsibility to
properly vent (exhaust) the heater outside. Please make sure your
heater is vented. If it is not vented, do not use the heater.
Immediately call your installer.
You heater may be vented in one of three ways: horizontal through
the wall, horizontal with an elbow through the wall or vertical
through the roof. You should know the way your heater is vented.
Refer to the following drawings to determine the type of venting
you have. If you are not sure, please contact your installer.
Venting
Optional Vent
Extension
3" (80 mm)
Flue Pipe
5" (125 mm) Air
Supply Pipe
Side View
Heater
10 (2048 mm) max.
2, 6 (762 mm) min.
Slope down 1/4 (6 mm) per ft.
towards vent terminal
Vent
Terminal
3" (80 mm) pipe is
slid through
end of terminal
6" (152 mm)
min.
Horizontal Venting Through the Wall
Carbon Monoxide Hazard
Heater must be exhausted outside.
Use materials supplied.
Failure to follow these instructions will
result in death or injury.
ATTENTION
WARNING
©Printed in the U.S.A P/N 91037300 Rev. B
Risque de monoxyde de carbone
L'échappement du radiateur doit s'ef-
fectuer à l'extérieur.
Utilisez le matériel fourni.
Le non-respect de ces consignes peut
entraîner mort ou blessures.

Using the Heater
19
ROBERTS-GORDON
Venting
(continued)
A
Heater
To Drain
Vent Termination
Rain Collar*
Roof Flashing*
Roof
Vent Tee
(see note)
Additional Vent Pipe
(Length as required)
Length
(per local codes)
Heater
Condensate Drain Hose*
A
Horizontal Venting with an Elbow
Roof Venting
Using the roof vent will cause condensate (water) to form in the vent. Roberts-Gordon
recommends the installer install drain hose for the condensate. Please make sure you have
a drain hose. If you do not, contact your installer.
The condensate must drain to a pail, bucket or preferably to a plumbing drain. If you use a
pail or bucket, remember to empty the contents periodically.
Wall
3” pipe is slid
through vent
terminal
3” Flue
Elbow
Heater
Optional Vent
Extension
min.
6”
Vent terminal 5” Air
Elbow
5”
3”
Heater
To Drain
Condensate Drain Hose
Vent Tee
Additional Vent
Pipe
(Length as
required)
Roof Flashing
Rain Collar
Vent Termination
Roof
- Top View -
- Side View -