Sterling RSG, RSG 25, RSG 45, RSG 35 Series Manual

STERLING “RSG” SERIES
INFRARED RADIANT TUBE HEATER

RSG SERIES TUBE HEATERS

RSG 25 RSG 35 RSG 45

(Check One)

NATURAL GAS PROPANE GAS

(Check One)

RSGS-2

EQUIPMENT USED:

ACCESSORIES:

Chain Mounting Kit:

Thermostat:

Gas Pressure Regulator:

Gas Shut-Off Valve:

Vent Cap:

Combustion Air Cap:

Other:

Other:

3/17

PROJECT:

UNIT TAG:

260 North Elm St., Westeld, MA 01085

[phone] Fax: [phone]

www.sterlinghvac.com

STERLING “RSG” SERIES
INFRARED RADIANT TUBE HEATER

1) GENERAL INFORMATION

This heater complies with ANZI Z83.20 (current
standard) and CSA 2-34.

This heater is a self-contained infrared radiant tube
heater for use in locations where ammable gases
or vapors are not generally present (as dened by
OSHA acceptable limits) and is intended for space
heating of garages, vestibules and entry ways,
workshops, enclosed patios, golf practice ranges
and most industrial and commercial applications.

DO NOT install this heater in residential bedrooms
or bathrooms, mobile homes or recreational vehicles.

For indoor installation only. Not for use in
residential dwellings.

INSTALLATION REQUIREMENTS

The installation must conform to local building codes
or in the absence of local codes, with the National Fuel
Gas Code ANSI Z223.1/NFPA54 or the Natural Gas
and Propane Installation Code CSA B149.1. Heaters
shall be installed by a licensed contractor or licensed
installer. Clearances to combustibles as outlined in this
manual should always be observed. In areas used for

storage of combustible materials where they may be

stacked below the heater, NFPA54 requires that the
installer must post signs that will “specify the maximum
permissible stacking height to maintain the required

clearances from the heater to combustibles.”

Every heater shall be located with respect to building
construction and other equipment so as to permit
access to the heater. Each installer shall use quality
installation practices when locating the heater and
must give consideration to clearances to combustible
materials, vehicles parked below, lights, overhead
doors, storage areas with stacked materials, sprinkler
heads, gas and electrical lines and any other possible
obstructions or hazards. Consideration also must be

given to service accessibility.

The heater, when installed in aircraft hangars and
public garages, must be installed in accordance with
ANSI/NFPA 409-latest edition (Standard for Aircraft
Hangars), ANSI/NFPA 88a-latest edition (Standard for
Parking Structures), and ANSI/NFPA 88b-latest edition
(Standard for Repair Garages) with the following

clearances:

At least 10 feet above the upper surfaces of wings or

engine enclosures of the highest aircraft that may be

housed in the hangar and at least 8 feet above the
oor in shops, ofces, and other sections of hangars

communicating with aircraft storage or service areas.

At least 8 feet above the oor in public garages.

Minimum clearances marked on the
heater must be maintained from vehicles parked
below the heater.

FOR CANADA ONLY

a. Installation of this appliance is to be in accordance

with latest edition of CSA B149.1 (Natural Gas and
Propane Installation Code).

b. For installation in public garages or aircraft

hangars, the minimum clearances from the bottom

of the infrared heater to the upper surface of the

highest aircraft or vehicle shall be 50 percent

greater than the certied minimum clearance, but
the clearance shall not be less than 8 feet.

Although these heaters may be used in many

applications other than space heating (e.g., process
heating), Sterling will not recognize the warranty for
any use other than space heating.

This heater is for Indoor Installation and Covered Patio
Installation only and can be used in either Vented or
Unvented mode. The term Unvented actually means
Indirect Vented. While the products of combustion
are expelled into the building, national codes require
ventilation in the building to dilute these products of
combustion. This ventilation may be provided by

gravity or mechanical means.

This heater is not an explosion proof heater.

Where the possibility of exposure to volatile and low
ash point materials exists, it could result in property
damage or death. This heater must not be installed in
a spray booth where the heater can operate during the
spraying process. Consult your local re marshal or

insurance company.

High Altitude:

Appliances are supplied as standard for altitudes of
0 to 2,000 feet (0-610 m). High-altitude ratings are
obtained by a change in the orice size. When ordered
for high altitude installations, burners are supplied by
the factory ready for high altitude installation. Check
the nameplate for altitude before proceeding with the
installation. In Canada the adjustment for altitude is
made in accordance with Standard CGA 2.17, Gas­Fired Appliances for Use at High Altitudes.

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STERLING “RSG” SERIES
INFRARED RADIANT TUBE HEATER

2) MINIMUM CLEARANCES TO COMBUSTIBLES

Minimum clearances to combustibles shall be

measured from the outer surfaces as shown in the
following diagram. For reduced clearances below the
heater, use the Deector Kit (Part No. 43504010),
described in Section 5, and maintain the minimum

when stored under the heater, will be subjected
to radiant heat and could be seriously damaged.
Observe the Minimum Clearances to Combustibles
listed in the manual and on the heater at all times.

Certain materials or objects,

clearances specied in the notes below. Follow the
instructions packaged with the kit for installation.

MINIMUM CLEARANCES TO COMBUSTIBLES

Mounted Horizontally Angle Mounted at 45°

Model No. Sides Ceiling

RSG 25 8" 4" 41" * 8" 30" 4"

RSG 35, 45 12" 4" 57" ** 8" 40" 4"

1

The clearance is 12" when installed in an UNVENTED conguration in industrial and commercial installations.

2

IN CANADA, clearances below the heater are: RSG 25 - 36" (27" with deector); RSG 35/45 - 48" (36" with deector)

* The clearance is 33" with deector.

** The clearance is 42" with deector / 30" side clearance with deector.

NOTE:

1. The clearances specied above must be maintained to combustibles and other materials that may be damaged by temperatures
90°F above ambient temperature. Clearances to combustibles are posted on the control box. In areas used for storage of

combustible materials where they may be stacked below the heater, NFPA54 requires that the installer must post signs that will
“specify the maximum permissible stacking height to maintain the required clearances from the heater to combustibles.” Sterling
recommends posting these signs adjacent to the heater thermostat or other suitable location that will provide enhanced visibility.

2. The stated clearance to combustibles represents a surface temperature of 90°F (32°C) above room temperature. Building

materials with a low heat tolerance (such as plastics, vinyl siding, canvas, tri-ply, etc.) may be subject to degradation at lower

temperatures. It is the installer’s responsibility to assure that adjacent materials are protected from degradation.

1

Below

2

Ends 45° Front 45° Rear

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STERLING “RSG” SERIES
INFRARED RADIANT TUBE HEATER

3) SPECIFICATIONS

Flue

Heat Total @

Model Btu/hr Exchanger Heater Part Natural Gas Propane Gas @ 45°

No. Input Length Length I.D. Number Horizontal Angle

RSG 25 25,000 7/8" #42741120 #42 (0.094) 1.45mm (0.057) 8' 8'

RSG 35 35,000 16' 9'-3" 1" #42741041 #35 (0.110) 1.75mm (0.069) 8' 8'

RSG 45 45,000 1-1/8" #42741031 1/8" (0.125) 5/64” (0.078) 8' 8'

Restrictor Plate

Orice Size

Minimum

Mounting Height*

* MOUNT HEATERS AS HIGH AS POSSIBLE. Minimums are shown as a guideline for human comfort and
uniform energy distribution for complete building heating applications. Consult your Sterling representative
for the particulars of your installation requirements.

Type Gas-Pipe Tube Flue Fresh Air Electrical Current

Gas Connection Diameter: Connection Connection Supply Rating

Natural or 1/2" MPT

Propane (Male) 60Hz, 1 Phase

Firing Rating Ignition System (Direct Spark)

Spark Module: 2 Amp 250V (for 24V Circuit) 30 second pre-purge period

3" 4" Round 4" Round

120 Volt,

2.6 Amp

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STERLING “RSG” SERIES
INFRARED RADIANT TUBE HEATER

4) DIMENSIONS

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STERLING “RSG” SERIES
INFRARED RADIANT TUBE HEATER

5) ACCESSORY PACKAGES

A. Exhaust Hood Package, Part #42924000

Contains:

Exhaust Hood Assembly, #42925540…...................… QTY–1

#8-18 x 1/2 Self-Drilling Screws, #02189030…........… QTY–2

B. Deector Kit, Part #43504010
The Deector Kit is available for use to reduce the

clearances to combustibles below the heater.
Refer to the “Minimum Clearances to Combustibles Table”

in Section 2 when using this Deector Kit. Heater must be
mounted ONLY in the horizontal position when using
this kit.

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