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NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
2
IMPORTANT SAFETY INFORMATION
INSTALLER: PLEASE LEAVE THESE INSTRUC-
TIONS WITH THE OWNER.
OWNER: PLEASE RETAIN THESE INSTRUC-
TION FOR FUTURE REFERENCE.
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
Assembling the Logs ....................... page 7
Flame Appearance ........................... page 7
Cleaning and Servicing .................... page 8
Replacement Parts .......................... page 8
Troubleshooting Guide .................... page 9
Operating Instructions ..................... page 10
Replacement Parts List.................... page 12
GENERAL INFORMATION
These See-Through Unvented Gas Log Room
Heaters incorporate unitized ceramic fiber logs
which glow realistically when the heater is
operating.
These log heaters are either thermostatic
(T-stat) or manually controlled. 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.
These heaters are fitted with a specially de-
signed pilot utilizing an oxygen depletion sen-
sor (ODS) which responds to the amount of
oxygen available in the room and shuts the
heater off before the oxygen level drops below
18%.
UNVENTED SEE-THROUGH GAS LOG ROOM HEATER TECHNICAL CHART
BTU/HR Regulator Gas Inlet Valve
Model No. High Gas Type Ignition Pres. Setting Pressure Operation
VFST-27VSN 34,000 Natural Piezo 5" w.c. Max. 10.5" w.c. Manual (Millvolt)
Min. 6" w.c.
VFST-27VSP 34,000 Propane/LPG Piezo 10" w.c. Max. 13" w.c. Manual (Millvolt)
Min. 11" w.c.
Note: Test gage connections are provided on the front of the gas control valve (identified A for the manifold side and E for inlet pressure).
The pilot can be relit only when fresh air is
available. Refer to the Combustion and Ventila-
tion Air section.
WARNING: ANY CHANGE TO THIS ROOM
HEATER OR ITS CONTROLS CAN BE DAN-
GEROUS. IMPROPER INSTALLATION OR
USE OF THIS HEATER CAN CAUSE SERI-
OUS INJURY OR DEATH FROM FIRE,
BURNS, EXPLOSION OR CARBON MON-
OXIDE POISONING.
WARNING: THIS APPLIANCE IS FOR IN-
STALLATION IN A SOLID FUEL BURN-
ING FIREPLACE WITH A WORKING FLUE
OR AN APPROVED VENTLESS FIREBOX
ENCLOSURE ONLY.
Minimum Fireplace (Firebox) Size
Height Depth Width
16" 18" 28" Front
Table 1
Do not install these See-Through Unvented
Gas Log Room Heaters in a bedroom or a
bathroom as all units exceed maximum al-
lowable 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.
WARNING: FAILURE TO INSTALL THESE
LOGS EXACTLY AS DETAILED IN THIS
INSTRUCTION MANUAL MAY RESULT IN
SOOTING AND MAY RESULT IN VOIDING
PRODUCT WARRANTIES.
Inventory
Unvented gas log room heater
Bag of decorative volcanic rock
Ceramic fiber logs
Installation and Operating Instructions
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
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 im-
mediately. Have the Unvented Gas Heater
serviced as it may not be operating correctly.
• Due to high temperatures, the heater 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
heater.
• Do not place clothing or other flammable
material on or near the heater.
• Any safety screen or guard removed for
servicing the heater must be replaced prior to
operating the heater.
• Installation and repair should be done by a
qualified service person. The heater should be
inspected before use and at least annually by a
professional service person. More frequent clean-
ing may be required due to excessive lint from
carpeting, bedding material, etc. It is important
that control compartments, burners and circulat-
ing air passageways of the heater be kept clean.