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NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
2
GENERAL INFORMATION
These Dual-Listed Gas Log Appliances incor-
porate unitized ceramic fiber logs which glow
realistically when the appliance is operating.
The gas log sets covered in this document are
heater rated units. These units are equipped
with either a standard manual gas valve or a
millivolt gas valve. The control knob is set to the
desired position, which maintains a continuous
gas burning rate.
A spark ignition system (piezo) allows the gas
pilot to be lit without the use of matches or
batteries and permits operation of the heater
during a power outage.
TABLE OF CONTENTS
General Information......................... page 2
Inventory ......................................... page 2
Tools Required ................................ page 2
Important Safety Information .......... page 2
Codes .............................................. page 3
Combustion and Ventilation Air ....... page 3
Preinstallation.................................. page 4
Clearances .......................................page 4
Installation....................................... page 6
Gas Pressure Check.........................page 6
Flame Appearance ........................... page 7
Operation......................................... page 8
Cleaning and Servicing .................... page 8
Replacement Parts .......................... page 8
Accessories ..................................... page 9
Millivolt Wiring Diagram .................. page 10
Appliance Specification Chart .......... page 10
Manual Wiring Diagram ................... page 11
Appliance Specification Chart .......... page 11
Operating Instructions – Manual ..... page 12
Operating Instructions – Millivolt .... page 14
Troubleshooting Guide .................... page 15
Replacement Parts List – Millivolt ... page 16
Replacement Parts List – Manual .... Page 18
Table 1
Do not install these Dual-Listed Gas Log
Appliances in a bedroom or a bathroom as all
units exceed maximum allowable BTU/hr
input of 10,000.
Check the inventory list to be sure that you have
all the necessary parts in usable condition. Also
check for concealed damage.
Inventory
Dual-Listed gas log appliance
Installation and Operating Instructions
Warranty Form
Tools and Supplies Normally Required
External regulator (Propane models only)
Manual shut-off valve
Sediment trap
Piping complying with local codes
Pipe compound
Pipe wrench
Tee joint
Screwdriver
IMPORTANT SAFETY INFORMATION
INSTALLER: PLEASE LEAVE THESE INSTRUC-
TIONS WITH THE OWNER.
STATE OF MASSACHUSETTS: THE INSTAL-
LATION MUST BE MADE BY A LICENSED
PLUMBER OR GAS FITTER IN THE COMMON-
WEALTH OF MASSACHUSETTS.
IMPORTANT: READ THESE INSTALLATION
INSTRUCTIONS CAREFULLY BEFORE IN-
STALLING OR TRYING TO OPERATE THIS
APPLIANCE.
These appliances are equipped with a specially
designed pilot utilizing an oxygen depletion
sensor (ODS) which responds to the amount
of oxygen available in the room and shuts the
heater off before the oxygen level drops below
18%. The pilot can be relit only when fresh air
is available. Refer to the Combustion and Ven-
tilation Air section.
OWNER: PLEASE RETAIN THESE INSTRUC-
TION FOR FUTURE REFERENCE
WARNING: FAILURE TO COMPLY WITH
THE INSTALLATION AND OPERATING IN-
STRUCTIONS PROVIDED IN THIS DOCU-
MENT WILL RESULT IN AN IMPROPERLY
INSTALLED AND OPERATING APPLI-
ANCE, VOIDING ITS WARRANTY. ANY
CHANGE TO THIS APPLIANCE AND/OR
ITS OPERATING CONTROLS IS DANGER-
OUS. IMPROPER INSTALLATION OR USE
OF THIS APPLIANCE CAN CAUSE SERI-
OUS INJURY OR DEATH FROM FIRE,
BURNS, EXPLOSION OR CARBON MON-
OXIDE POISONING.
Carbon Monoxide Poisoning: Early signs of
carbon monoxide poisoning are similar to the
flu with headaches, dizziness and/or nausea. If
you have these signs, obtain fresh air immedi-
ately. Turn off the gas supply to the appliance
and have it serviced by a qualified profes-
sional, as it may not be operating correctly.
• Due to high temperatures, the appliance
should be located out of traffic and away from
furniture and draperies.
• Children and adults should be alerted to the
hazard of high surface temperature and should
stay away to avoid burns or clothing ignition.
• Young children should be carefully super-
vised when they are in the same room with the
appliance.
• Do not place clothing or other flammable
material on or near the appliance.
• Any safety screen or guard removed for
servicing the appliance must be replaced prior
to operating the appliance.
• Installation and repair should be done by a
qualified service person. The appliance should
be inspected before use and at least annually
by a professional service person. More fre-
quent cleaning may be required due to exces-
sive lint from carpeting, bedding material, etc.
It is important that control compartments,
burners and circulating air passageways of the
appliance be kept clean.
• Allow the appliance to cool before servicing.
Always shut off the gas to the appliance while
performing service work.
WARNING: THIS APPLIANCE IS FOR IN-
STALLATION ONLY IN A SOLID FUEL
BURNING FIREPLACE WITH A WORKING
FLUE OR AN APPROVED VENTLESS FIRE-
BOX ENCLOSURE.
Minimum Fireplace (Firebox) Size
Log Set Height Depth Width
SHGL-18 18" 14" 30" Front
20 ¹⁄₂" Rear
SHGL-24 18" 14" 35" Front
24 ¹⁄₂" Rear