Monessen Hearth AVFLST42NTSC Manual

This is an unvented gas-red heater. It uses air
(oxygen) from the room in which it is installed.
Provisions for adequate combustion and
ventilation air must be provided. Refer to Page 7.
20308636 0516 Rev. 1
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
• Do not store or use gasoline or other
ammable vapors and liquids in the
vicinity of this or any other appliance.
• WHAT TO DO IF YOU SMELL GAS
– Do not try to light any appliance.
– Do not touch any electrical switch; do
not use any phone in your building.
– Leave the building immediately.
– 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 re department.
• Installation and service must be performed
by a qualied installer, service agency or
the gas supplier.
WARNING! If the information in this manual
is not followed exactly, a re or explosion may
result causing property damage, personal
injury or loss of life.
AVFLST Vent Free See Through
Fireplace System
Installation & Operating Instructions
Models: AVFLST42NTSC and AVFLST42PTSC

220308636
AVFLST Vent Free Fireplace
CONTENTS
Thank you and congratulations on your purchase of a Monessen replace.
PLEASE READ THE INSTALLATION AND OPERATION INSTRUCTIONS BEFORE USING THE APPLIANCE!
IMPORTANT: Read all instructions and warnings carefully before starting installation.
Failure to follow these instructions may result in a possible re hazard and will void the warranty.
IMPORTANT SAFETY INFORMATION ......................... 3
Building code information ............................................ 4
PRODUCT FEATURES.................................................. 5
AVFLST42 controls ..................................................... 5
Gas specications & orice size .................................. 5
Gas pressures ............................................................. 5
FIREPLACE and FRAMING DIMENSIONS .................. 6
PRE-INSTALLATION INFORMATION ........................... 7
Getting started ............................................................. 7
What you will need for installation ............................... 7
Planning the installation .............................................. 7
Adequate combustion and ventilation air .................... 7
Fireplace location ........................................................ 8
Clearances and height requirements .......................... 9
FIREPLACE INSTALLATION ...................................... 10
Secure replace to framing ....................................... 10
Finishing material ...................................................... 10
Noncombustible facing installation ............................ 10
Connect the gas .........................................................11
Check gas pressure .................................................. 12
Gas pressures ........................................................... 12
ELECTRICAL INSTALLATION.................................... 13
Wiring junction box .................................................... 13
FINAL INSTALLATION ................................................ 15
Installation of air deection glass .............................. 15
Fireglass only placement .......................................... 15
Glass and optional stone kit placement .................... 15
OPERATING INSTRUCTIONS .................................... 16
For your safety read before lighting .......................... 16
Turning on unit .......................................................... 17
To turn off gas to appliance ....................................... 17
SIGNATURE COMMAND®SYSTEM OPERATION..... 18
Features .................................................................... 18
Battery installation ..................................................... 18
System conguration/setup ....................................... 18
Cold climate option .................................................... 18
Signature Command® system function settings ........ 19
Functions/operation ................................................... 20
Self diagnostics chart: ............................................... 20
Command center operations: .................................... 20
TOUCH SCREEN REMOTE CONTROL OPERATION 21
FLAME APPEARANCE & LED CONTROL................. 27
Flame appearance .................................................... 27
Check the pilot ame ................................................. 27
Check the burner ame ............................................. 27
LED Control ............................................................... 27
MAINTENANCE and CLEANING................................ 28
Cleaning and servicing .............................................. 28
Replacing top light bulb ............................................. 28
Replacing led strips ................................................... 28
Operating information ................................................ 30
Optional accessories ................................................. 30
OPERATION AND OPTIONAL ACCESSORIES ......... 30
TROUBLESHOOTING................................................. 31
REPLACEMENT PARTS ............................................. 34
LIMITED LIFETIME WARRANTY................................ 36

20308636 3
AVFLST Vent Free Fireplace IMPORTANT SAFETY INFORMATION
WARNING!
• Any change to this heater or its controls can be dangerous.
• Improper installation or use of the heater can cause serious injury or death from re, burns,
explosion or carbon monoxide poisoning.
• Do not allow fans to blow directly into the replace. Avoid any drafts that alter burner ame patterns.
• Do not use a blower insert, heat exchanger insert or other accessory, not approved for use with
this heater where applicable.
INSTALLER
Please leave these instructions with the appliance.
OWNER
Please retain these instructions for future reference .
1. Due to high temperatures, the appliance should be
located out of trafc and away from furniture and
draperies.
2. Children and adults should be alerted to the hazard
of high surface temperature and should stay away
to avoid burns or clothing ignition.
3. Young children should be carefully supervised when
they are in the same room with the appliance.
4. Do not place clothing or other ammable material
on or near the appliance.
5. Any safety screen or guard removed for servicing
an appliance, must be replaced prior to operating
the heater.
6. Installation and repair should be done by a quali-
ed service person. To prevent malfunction and/or
sooting, an unvented gas heater should be cleaned
before use and at least annually by a professional
service person. More frequent cleaning may be
required due to excessive lint from carpeting,
bedding materials, etc. It is imperative that control
compartments, burners and circulating air passage-
ways be kept clean.
7. WARNING! Any change to this heater or its controls
can be dangerous.
8. Unvented gas heaters are a supplemental zone
heater. They are not intended to be the primary
heating appliance.
9. CARBON MONOXIDE POISONING: Early signs of
carbon monoxide poisoning are similar to the u with
headaches, dizziness and/or nausea. If you have these
signs, obtain fresh air immediately. Have the heater
serviced as it may not be operating properly.
10. The installation must conform with local codes or, in
the absence of local codes, with the National Fuel
Gas Code, ANSI Z223.l/NFPA54.
11. This unit complies with ANSI Z21.11.2 Unvented
Heaters, latest edition.
12. Do not install the heaters in a bathroom or bedroom.
13. Proper location of the heater, and annual cleaning are
necessary to avoid potential problems with sooting.
Sooting, resulting from improper installation or opera-
tion, can settle on surfaces outside the replace.
14. Avoid any drafts that alter burner ame patterns. Do not
allow fans to blow directly into replace. Do not place
a blower inside burn area of rebox. Ceiling fans may
create drafts that alter burner ame patterns. Sooting
and improper burning will occur.
15. Caution: Candles, incense, oil lamps, etc. produce
combustion byproducts including soot. Vent-free
appliances will not lter or clean soot produced by
these types of products. In addition, the smoke and/or
aromatics (scents) may be re-burned in the vent-free
appliance which can produce odors. It is recommended
to minimize the use of candles, incense, etc. while the
vent-free appliance is in operation.
16. This is an unvented gas-fired heater. It uses air
(oxygen) from the room in which it is installed. Provi-
sions for adequate combustion and ventilation air must
be provided. Refer to Page 7.
17. This heater shall not be installed in a room or space
unless the required volume of indoor combustion air is
provided by the method described in the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, the International
Fuel Gas Code or applicable local codes.
18. Keep room area clear and free from combustible mate-
rials, gasoline and other ammable vapors and liquids.
19. Unvented gas heaters emit moisture into the living
area. In most homes of average construction, this
does not pose a problem. In houses of extremely
tight construction, additional mechanical ventilation is
recommended.
20. During manufacturing, fabricating and shipping, various
components of this appliance are treated with certain
oils, lms or bonding agents. These chemicals are not
harmful but may produce annoying smoke and smells

420308636
AVFLST Vent Free Fireplace
IMPORTANT SAFETY INFORMATION
as they are burned off during the initial operation of the
appliance; possibly causing headaches or eye or lung
irritation. This is a normal and temporary occurrence.
The initial break-in operation should last two to three
hours with the burner at the highest setting. Provide
maximum ventilation by opening windows or doors to
allow odors to dissipate. Any odors remaining after this
initial break-in period will be slight and will disappear
with continued use.
21. Input ratings are shown in BTU per hour and are for
elevations up to 2,000 feet. For elevations above 2,000
feet, input ratings should be reduced 4 percent for each
1,000 feet above sea level. Refer to the National Fuel
Gas Code.
22. The appliance and its appliance main gas valve must
be disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of 1⁄2 psig (3.5 kPa).
23. The appliance must be isolated from gas supply piping
system by closing its equipment shutoff valve during
any pressure testing of the gas supply piping system at
test pressures equal to or less than 1⁄2 psig (3.5 kPa).
24. Do not use this room heater if any part has been under
water. Immediately call a qualied service technician
to inspect the room heater and to replace any part of
the control system and any gas control which has been
under water.
25. Never burn solid fuels in a replace where a unvented
room heater is installed.
BUILDING CODE INFORMATION
Adhere to all local codes or, in their absence, the latest
edition of THE NATIONAL FUEL GAS CODE ANSI Z223.1
or NFPA54 which can be obtained from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
or
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
This appliance may be installed in an after-
market, permanently located, manufactured
(mobile) home, where not prohibited by local
codes.
This appliance is only for use with the type of
gas indicated on the rating plate. This appliance
is not convertible for use with other gases.

20308636 5
AVFLST Vent Free Fireplace PRODUCT FEATURES
NOTE: For LP models an external regulator is required
to reduce supply pressure to a maximum of 13" w.c.
GAS SPECIFICATIONS & ORIFICE SIZE
AVFLST42 CONTROLS
MODEL FUEL
MAX. INPUT
(BTU/h)
MIN. INPUT
(BTU/h)
ORIFICE
SIZE
AVFLST42NTSC NAT. 37,000 24,500 2.20 mm
AVFLST42PTSC L P. 36,000 28,500 #55
GAS PRESSURES
NATURAL PROPANE (LP)
Inlet Minimum 5.0" w.c. 11.0" w.c.
Inlet Maximum 10.5" w.c. 13.0" w.c.
Regulator Pressure
Setting
3.5" w.c. 10" w.c.
Pilot Regulator 3.5" w.c. —
Control Board
ODS Module
Command Center
AC Module
LED Control
Module
Figure 1. AVFLST42 Controls (Control Access Door Shown Open)

620308636
AVFLST Vent Free Fireplace
FIREPLACE AND FRAMING DIMENSIONS
13⁄"
[154mm]
32"
[813mm]
43"
[1092mm]
48½"
[1232mm]
39¾"
[1010mm]
37½"
[953mm]
6⁄"
[154mm]
28"
[711mm]
15⁄"
[386mm]
½"[13mm]
or
⁄"[16mm]
½"[13mm]
or
⁄"[16mm]
Minimum Rough
Framing Height
32"
[813mm]
Minimum rough
opening depth
for 5/8" wall thickness
12"
[305mm]
Interior wall
installation
Exterior wall
installation
Minimum Rough
Framing Width
44"
[1118mm]
44"
[1118mm]
Wall cover
thickness
Wall cover
thickness
Minimum rough
opening depth
for 5/8" wall thickness
14⁄"
[378mm]
Figure 2. Fireplace dimensions
Figure 3. Framing dimensions with outdoor kit installed
(AVFLSTSSODK)

20308636 7
AVFLST Vent Free Fireplace
GETTING STARTED
Check to verify that all listed parts have been received.
You should have the following:
• One (1) Unvented gas heater
• Two (2) Anchoring screws
• One (1)Installation/operating instructions
• Two (2) 5" noncombustible board
• Two (2) 2" x 32" deector glass
• Two (2) Bags reglass
• One (1) 100 watt bulb
• One (1) TSFSC remote control
Carefully inspect the contents for shipping damage. If any
parts are missing or damaged, immediately inform the
dealer from whom you purchased the appliance. Do not
attempt to install any part of the appliance unless you
have all parts in good condition.
WHAT YOU WILL NEED FOR INSTALLATION
You must have the following items available before pro-
ceeding with installation:
• External regulator (for propane/LPG only)
• Manual shutoff valve
• Piping which complies with local codes
• Sediment trap
• Phillips head screwdriver
• Tee joint.
• Pipe sealant approved for use with propane/LPG
(Resistant to sulfur compounds)
• Pipe wrench
PRE-INSTALLATION INFORMATION
PLANNING THE INSTALLATION
In planning the installation for the replace it is necessary
to determine where the unit is to be installed and whether
optional accessories are desired. Gas supply piping should
also be planned. The following steps represent the normal
sequence of installation. Each installation is unique, how-
ever, and might require a different sequence.
1. Position fireplace in desired location. Refer to the
Fireplace and Framing Dimensions (page 6, Figures 2
and 3,) Fireplace Location (page 8, Figure 5) and
Clearances and Height Requirements (page 9, Figures
6 and 7.)
NOTE: Be sure all cardboard packing material has been
removed from under the unit.
2. Install following the instructions found in this manual.
3. Field wire main power supply to junction box. Refer to
the Electrical Installation section (page 13). (Electrical
connections should only be performed by an experi-
enced, licensed certied service person).
4. Plumb gas line. Refer to the Connect the Gas (page
11, Figure 10) section found in this manual. (Gas
connections should only be performed by an experi-
enced, licensed/certied service person).
5. Complete nish wall material and/or surround.
ADEQUATE COMBUSTION AND
VENTILATION AIR
This heater shall not be installed in a conned space or
unusually tight construction unless provisions are provided
for adequate combustion and ventilation air.
The National Fuel Gas Code, (ANSI Z223.1/NFPA54),
denes a conned space as a space whose volume is less
than 50 cubic feet per 1,000 BTU per hour (4.8m3 per kw)
of the aggregate input rating of all appliances installed in
that space, and an unconned space as a space whose
volume is not less than 50 cubic feet per 1,000 BTU per
hour (4.8 m3 per kw) of the aggregate input rating of all
appliances installed in that space. Rooms communicating
directly with the space in which the appliances are installed,
through openings not furnished with doors, are considered
a part of a conned space.
Unusually tight construction is dened as construction
where:
a. Walls and ceilings exposed to the outside atmosphere
have a continuous water vapor retarder with a rating of
1 perm (6 x 1011 kg per pa/sec-m2) or less with openings
gasketed or sealed, and
b. Weather stripping has been added on openable win-
dows and doors, and
WARNING!
Do not install the heater:
•Where curtains, furniture, clothing, or
other ammable objects are less than 36"
from the front of the heater.
• In high trafc areas.
• In windy or drafty areas.

820308636
AVFLST Vent Free Fireplace
PRE-INSTALLATION INFORMATION
FP3029
c. Caulking or sealants are applied to areas such as joints
around window and door frames, between sole plates
and oors, between wall-ceiling joints, between wall
panels, at penetrations for plumbing, electrical and gas
lines and other openings.
The following formula can be used to determine the maxi-
mum heater rating per the denition of unconned space:
BTU/Hr = (L1+ L2) Ft x (W) Ft x (H) Ft
50
Consider two connecting rooms with an open area
between, with the following dimensions:
L1 = 151/2 Ft., L2 = 12 Ft., W = 12 Ft., H = 8 Ft.
BTU/Hr = (151/2 + 12) x (12) x (8)
50
If there were a door between the two rooms the calculation
would be based only on the room with the heater.
BTU/Hr = (151/2) x (12) x (8)
50
FIREPLACE LOCATION
This unvented gas heater requires no outside venting and
burns cleanly and efciency. As a zero-clearance unvented
gas heater, it can be installed recessed into any wall that is
accessible to a gas line, except in a bedroom or bathroom.
Carefully select the best location for installation of your
unvented replace. The following factors should be taken
into consideration.
• Clearance to side wall, ceiling, woodwork and window
or other combustibles. Refer to Clearance and Height
Requirements section on Page 9. Minimum clearances
to combustibles must be maintained.
• Location must not be affected by drafts caused by
kitchen exhaust fans, ceiling fans, return air registers
for forced air furnaces / air conditioners, windows or
doors.
• Installation must provide adequate ventilation and
combustion air.
• DO NOT INSTALL THIS MODEL IN A BEDROOM
OR BATHROOM.
• Location should be out of high trafc areas and
away from furniture and draperies due to heat from
rebox.
• Never obstruct the front opening of the unvented re-
place or restrict the ow of combustion and ventilation
air.
• Minimize modications to existing construction. Refer
to Figure 5 below for location suggestions.
• Do not install in the vicinity where gasoline or other
ammable liquids may be stored. The unvented re-
box must be kept clear and free from the combustible
materials.
WARNING!
If the area in which the heater may be operated
does not meet the required volume for indoor
combustion air, combustion and ventilation
air shall be provided by one of the methods
described in the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, the International Fuel Gas
Code or applicable local codes.
W
H
Counter
Fireplace
Figure 4.
Fireplace locations
Indoor application
Exterior wall application
with AVFLSTSSODK installed
Figure 5. Possible Fireplace Locations

20308636 9
AVFLST Vent Free Fireplace PRE-INSTALLATION INFORMATION
CLEARANCES AND HEIGHT
REQUIREMENTS
Ensure that minimum clearances shown in Figures 6 and
7 are maintained. Left and right clearances are determined
when facing the front of the rebox.
Follow these instructions carefully to ensure safe instal-
lation. Failure to follow these requirements may create a
re hazard.
Sidewall Clearances — The clearance from the inside of
the appliance to any combustible adjacent wall should not
be less than 6". Figure 6
Ceiling Clearance — The ceiling or any other combustible
material must be at least 36" from the rebox opening.
Figure 6
WARNING!
The dimensions shown in Figures 5 and 6
are minimum clearances to maintain when
installing this heater. Left and right clearances
are determined when facing the front of the
heater.
Follow these instructions carefully to ensure
safe installation. Failure to follow instructions
exactly can create a re hazard.
Floor Clearance — The replace may be installed directly
on a combustible oor or a raised platform of an appropriate
height. Do not place replace on carpeting, vinyl, tile or
other soft oor coverings. It may, however, be placed on at
wood, plywood, particle board or other hard surfaces. Be
sure replace rests on a solid continuous oor or platform
with appropriate framing for support so that no cold air can
enter from under the rebox.
Mantel clearances — Must meet the clearance require-
ments detailed in Figures 6 and 7.
36"Minimum
From Opening
12"Max.
Depth
21/2"Max
Depth
18"Min.
From Opening
28"Min.
From Opening
6"Min.
FP3006
mantel clearances
Figure 6. Sidewall and Ceiling Clearances
FP3006
Figure 7. Mantel Clearances
23"
28"
18"
12"
6"
21/2"
FP3007
mantel clearances
Top of Fireplace
Opening
FP3007
SIDE VIEW
Wall
Insulation
Board
Stud
Standoff
6"
5"
3"4¹⁄₂"45°
1"
3¹⁄₂"
FP3008
mantel leg
1¹⁄₂"
2¹⁄₂"
Fireplace
Opening
FP3008
TOP VIEW

10 20308636
AVFLST Vent Free Fireplace
FIREPLACE INSTALLATION
SECURE FIREPLACE TO FRAMING
The replace must be secured to the framing studs as
shown in Figure 8. Use four (4) screws to attach replace
to framing. The side nailing anges are 1⁄2" or 5⁄8" to accom-
modate different wall thickness.
WARNING!
Never install combustible materials over front
face of replace.
FINISHING MATERIAL
NOTE: Any remote wiring (i.e. remote control, wall
switch), must be done prior to nal nishing to avoid costly
reconstruction.
Only noncombustible materials (i.e. brick, tile, slate, steel,
or other materials with a UL re rating of Zero) may be
used to cover the black painted face of the appliance. It is
permissible to bring combustible wall board to the top of
the standoffs on the top and to the wall board stand-offs
on the sides of the unit. A 300°F minimum adhesive may
be used to attach facing materials to the black surface. If
joints between the nished wall and the replace surround
are sealed, a 300°F minimum sealant material (General
Electric RTV103 or equivalent) must be used.
NOTE: Fireplace may be installed on top of framing or
platform constructed of combustible materials which do
not protrude beyond the face.
NONCOMBUSTIBLE FACING INSTALLATION
CAUTION: The noncombustible wall board supplied with
this unit can be damaged if dropped or struck. Handle
with care.
1. Using drywall screws, secure the noncombustible board
to the two brackets on top of the unit. IMPORTANT: To
avoid cracking the board, pre-drill holes prior to securing
to the unit/framing.
2. Wipe any debris or dust from the noncombustible board
and drywall.
3. It is highly recommended to prime the facing using a
quality primer prior to taping and mudding. This will
ensure proper adhesion of both the tape and mud. The
supplied board is very porous.
4. Tape the seams using a mesh type tape.
5. Mud seams as normal. We recommend using a product
called Durabond high strength compound for the rst
coat. This product can be purchased at any hardware
store. Follow manufacturer's recommendations for curing
the mud. NOTE: Depending upon the nal nishing
method, use a minimum rated 300 degree sealant, dry-
wall compound or thin set to seal the side and top joints.
6. Prime wall for a second time for proper adhesion of paint.
5"
43"
44"
32"
MOUNTING POINTS
Supplied noncombustible board
5”
Framing
Members
Nailing
Flange
Screws
Noncombustible Material
Nailing
Flange
Nailing
Flange
Screws
Figure 8. Secure Fireplace to Framing Studs
Figure 9. Noncombustible board installation

20308636 11
AVFLST Vent Free Fireplace FIREPLACE INSTALLATION
CONNECT THE GAS
NOTICE: A qualied gas appliance installer must connect
the heater to the gas supply. Consult all local codes.
WARNING!
Use new black iron or steel pipe. Internally
tinned copper or copper tubing can be used
per National Fuel Code, section 2.6.3, providing
gas meets hydrogen sulde limits, and where
permitted by local codes. Gas piping system
must be sized to provide minimum inlet
pressure (Listed on Data Plate) at the maximum
ow rate (BTU/hr). Undue pressure loss will
occur if the pipe is too small.
A manual shutoff valve must be installed
upstream of the appliance. Union tee and
plugged 1⁄8" NPT pressure tapping point should
be installed upstream of the appliance. Figure
10
A sediment trap should be installed upstream
to prevent moisture and contaminants from
passing through the pipe to appliance controls
and burners. Failure to do so could prevent the
appliance from operating reliably. Figure 10
IMPORTANT: Loosen the pipe adapter on the ex tube
before installing to the system piping.
Always use an external regulator for all propane/LPG heat-
ers only, to reduce the supply tank pressure to a maximum
of 13" w.c. This is in addition to the internal regulator in the
heater valve.
When tightening the joint to the valve, hold the valve
securely to prevent movement.
Test all gas joints from the gas meter to the heater valve for
leaks using a gas analyzer or soap and water solution after
completing connection. DO NOT USE AN OPEN FLAME.
WARNING!
CHECK GAS TYPE: The gas supply must be the
same as stated on the heater’s rating plate. If the
gas supply is different, DO NOT INSTALL THE
HEATER. Contact your dealer for the correct
model.
WARNING!
Connecting directly to an unregulated
propane/LP tank can cause an explosion.
FP2447
gas connection
To Fireplace
Pipe
Coupling
Stainless
Flexible Tube
Pipe
Locations Pressure Tapping
Point Installation
Manual Shutoff
Valve
Gas Supply
Inlet
FP2447
Tee Joint
Pipe Nipple
Cap
Sediment
Trap
3" minimum
WARNING!
DO NOT USE OPEN FLAME TO CHECK FOR
GAS LEAKS.
WARNING!
This appliance is equipped for either natural or propane
gas. Field conversion is not permitted.
Figure 10. Gas Connection

12 20308636
AVFLST Vent Free Fireplace
FIREPLACE INSTALLATION
CHECK GAS PRESSURE
Figure 11
Check the gas pressure with the appliance burning and
the control set to HIGH.
The valve regulator controls the burner pressure which
should be checked at the pressure test point.
Open control access door at bottom front of unit to nd
valve and regulator.
Turn captured screw counterclockwise two or three turns
and then place tubing to pressure gauge over test point.
Use test point “A” closest to gas inlet. If the pressure is not
within the range listed for your gas type turn the valve reg-
ulator until it is within range. After taking pressure reading,
be sure and turn captured screw clockwise rmly to reseal.
Do not over torque. Check for gas leaks.
GAS PRESSURES
NATURAL PROPANE (LP)
Inlet Minimum 5.0" w.c. 11.0" w.c.
Inlet Maximum 10.5" w.c. 13.0" w.c.
Regulator Pressure
Setting
3.5" w.c. 10" w.c.
Pilot Regulator 3.5" w.c. —
FP3036
AVFL valve
Test Port 'A'
FP3036
Figure 11. Pressure Test Point Location – Signature Command® Valve

20308636 13
AVFLST Vent Free Fireplace ELECTRICAL INSTALLATION
IMPORTANT: Always check local building codes. This in-
stallation must comply with local regulations as well as
the National Electric Code.
WIRING JUNCTION BOX
1. Before installing, wire the receptacle into an electrical
circuit. This should be done before framing the re-
place. Wire with minimum 60° C wire in accordance
with prevailing codes.
2. Junction box was installed at the factory. Remove the
external junction box cover by removing the screw
from the right side of the outside rebox wall.
3. The junction box cover has a factory installed “romex”
style strain relief connector. After connecting the wires,
route the wire leads through this connector.
WARNING!
Electrical connections should only be performed by
a qualied licensed electrician. Main power supply
must be turned off before connecting to the main
electrical power supply or performing service.
WARNING!
Electrical Grounding Instructions:
This appliance is equipped with a three-prong
(grounding) plug for your protection against shock
hazard and should be plugged directly into a
properly grounded three prong receptacle.
WARNING!
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify
proper operation after servicing.
For vent free Signature Command® Systems, the unit will
continue to burn during power loss only with batteries
installed. Without power, the unit will shut down without
batteries installed but can be started with fresh batteries
installed in the Command Center.
Figure 12. Junction Box Wiring Diagram
FP1912
Junction box wiring
8/08
Junction Box
Factory Supplied
Not Supplied
120V AC
60Hz

14 20308636
AVFLST Vent Free Fireplace
Control Board
RF Receiver
ON/OFF Button
Black / Thermopile
Red / Thermopile
Sensor
Ignitor / Sparker
Plug-in Connector
Control Board to Command Center
OFF/LO LED ON/HI
Master Switch
Command Center Optional
Wall Switch
Plug-in Connector
Stepper Motor to
Control Board
DC Power/Green
Ground
Plug-in Connector
Control Board to
Solenoid
Gas In Gas Out
Pilot Gas Tubing
Valve
Black
Yellow
Thermocouple
Pilot
Thermocouple
Module
Orange
Red
Plug in
Connector “A”
A/C MODULE
TO JUNCTION BOX
IN FIREPLACE
PLUG-IN
CONNECTOR “A”
WHITE
BLACK
GREEN
WHITE
BLACK
Opt. Blower
Hearth Light
WHITE
BLACK
Top Lamp
100w
TRANSFORMER
CONTROL
MODULE
TOP BUTTON
ON/HI/MED/LO/OFF
BOTTOM BUTTON
Color Selection
RED
WHITE
YELLOW
BLACK
RED BLACK
BLACK BLACK BLACK
BLACK
LED Strips
TO JUNCTION BOX
IN FIREPLACE
ELECTRICAL INSTALLATION
NOTE: Wall switch wires must
be connected together if a wall
switch is not being used.
Figure 13. Signature Command® Wiring Diagram FP3010
SIGNATURE COMMAND®WIRING DIAGRAM

20308636 15
AVFLST Vent Free Fireplace FINAL INSTALLATION
INSTALLATION OF AIR DEFLECTION
GLASS
NOTE: The 32" deector glass must be installed prior
to placing any reglass or stone media on the burner.
To install the air deection glass simply place the tabs
(located at the bottom of the glass) into the slots at
either end of the burner oor, in front of the burner ports.
The glass should stand upright, neither leaning forward
nor backward. Repeat for the second glass deector
installation.
FIREGLASS ONLY PLACEMENT
NOTE: Two (2) bags of reglass are supplied with the
replace. Both bags may be used to cover the entire oor
and burner. We advise against using additional reglass
as too much can cut off the proper amount of air the burner
needs to burn cleanly. This may cause sooting.
1. Spread reglass evenly in one layer over the entire oor
and burner. It is important to not have the reglass too
thick on ported area (single layer only).
2. Turn burner on and adjust reglass over ported areas
to achieve an even, clean ame.
GLASS AND OPTIONAL STONE KIT
PLACEMENT
1. For best results, spread reglass evenly over the entire
oor and burner making sure the reglass is not too
thick over the burner ports (single layer only).
2. Place the stones randomly in front of and behind the
air deection glass. CAUTION: Do not allow stones to
sit directly on burner or in ame. Figure 16.
3. Turn burner on and adjust reglass over the ported area
to achieve an even, clean ame. (page 27, Figure
32.)
Figure 16. Air Deection Glass and Stone Placement
Burner Surface
Examples of
Stone Placement
Figure 14. Air Deection Glass Placement (before) Figure 15. Air Deection Glass Placement (after)

16 20308636
AVFLST Vent Free Fireplace
OPERATING INSTRUCTIONS
A. This appliance is equipped with an ignition device which automatically lights the pilot.
B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to
the oor because some gas is heavier than air and will settle on the oor.
WHAT TO DO IF YOU SMELL GAS:
• Do not attempt to light any appliance.
• Do not touch any electric switch; do not use any phone in your 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 re department.
C. Use only your nger to push in the master switch. Never use tools. If the switch will not function
by hand, do not try to repair it. Call a qualied service technician. Force or attempted repair
may result in a re or explosion.
D. Do not use this appliance if any part of it has been under water. Immediately call a qualied
service technician to inspect the appliance and to replace any part of the control system and
any gas control that has been under water.
WARNING!
If you do not follow these instructions exactly,
a re or explosion may result causing property
damage, personal injury or loss of life.
FOR YOUR SAFETY READ BEFORE LIGHTING

20308636 17
AVFLST Vent Free Fireplace OPERATING INSTRUCTIONS
TURNING ON UNIT
1. STOP! Read the safety information on page 16.
2. This appliance is equipped with an ignition device which automatically lights the burner. Do not try
to light the burner by hand.
3. Smell for gas, including near the oor. If you smell gas, STOP! Follow "B" in the safety information
on page 16. If you do not smell gas, go to next step.
4. Press the master switch to the "ON" (-) position. Within eight (8) seconds it will beep once. This
indicates the system is ready.
5. Press "ON " button. Sparker will spark and pilot ame will light.
6. Once pilot ame is established, the main burner ame will light automatically.
7. If the pilot will not stay lit after several tries, turn the master switch to "OFF" and call your service
technician or gas supplier.
TO TURN OFF GAS TO APPLIANCE
1. Turn master switch to "OFF".
2. Turn off all electrical power to the appliance if service is to be performed.
3. Wait ve (5) minutes to clear out any gas before attempting to re-light the appliance.
OFF ON
FP1913
Switch box
8/08
Command Center
ON
Master
Switch
OFF
Thermocouple
for Natural Gas
Thermocouple
for Propane Gas
Sparker
Pilot

18 20308636
AVFLST Vent Free Fireplace
SIGNATURE COMMAND®SYSTEM OPERATION
FEATURES
Command Center
• Easy Access Function Operation and System Con-
guration
• Operation Conrmation/Fault Diagnostic Indications
(LED/Buzzer)
• ON/OFF/HI/Med/Low Operation
• Optional Wall Mounting
Control Board
• Electronic Ignition
• Pilot Lockout safety feature
• Electric Power Regeneration from Thermopile to save
battery
• 6-hour Automatic Shut Down Option
• Standing Pilot/Intermittent pilot Conversion
• Previous settings Restoration Ability (Memory Off)
• Uninterrupted Operation During Power Outage (Auto-
matic Battery Backup)
• ON/OFF RF Remote Receiver
• Optional Transmitter Learn Capability
AC Module (Requires TSFSC Remote)
• Easy Snap-on Design
• Embedded Compact 120 VAC Adapter with Auto Bat-
tery Back up Feature
• Remote Controlled 3-step Blower, Lighting, and On/
Off Auxiliary AC Outputs
Transmitter – TSFSC
• Three Flame Height Settings
• Low battery Indication for Transmitter
• Child Proof Lock-out
• LCD Backlight
• Security Codes 16
• Countdown 6 hr Timer
• Standard Thermostatic Control Mode
• Smart Mode® Thermostat (Auto Flame & Blower
Modulation)
• Three Brightness Settings for Lights
• On/Off Auxiliary
BATTERY INSTALLATION
The Command Center uses four (4) "AA" batteries as
back up for power outages. The system can operate for
approximately six (6) months on battery power.
To Install Batteries (not included):
1. Press down the battery door tabs and pull out to remove
battery door.
2. Install the batteries as indicated on Command Center.
3. Close battery door by snapping in place.
4. When the four (4) batteries are installed the system will
operate without power.
5. The batteries should be replaced when the LED indi-
cates low battery or at least once a year.
SYSTEM CONFIGURATION/SETUP
All System conguration/setup is done on the Command
Center.
NOTE: When using On/Off wall switch, the switch must be
in the ON position to perform all conguration set ups at
the command center.
COLD CLIMATE OPTION
Choose the Mode That Best Suits Your Needs
The Signature Command® System is designed to operate
in either Standing Pilot or Intermittent Pilot mode.
• The Standing Pilot Mode is best for colder climates
when the pilot must remain on continuously to prevent
condensation and ensure reliable operation.
• The Intermittent Pilot Mode is ideal for maximum ef-
ciency, igniting the pilot only when needed to start your
replace, lowering fuel consumption and reducing your
carbon footprint.
Either mode benets from the instantaneous battery back-
up, so you never have to worry about a power outage.
NOTE: The Signature Command® System comes standard
in the Intermittent Pilot mode, so you must follow the in-
structions below to switch to Standing Pilot Mode if needed.
Figure 17. Signature Command® System Components
FP1917
Signature components
8/08
RF Receiver
ON/OFF
NG/LP
Conversion
To Thermopile
To Sensor
To Sparker
To Command Center
To Stepper Motor
To Valve
Battery Door
Master Switch
ON
LED
OFF
CONTROL BOARD
COMMAND CENTER
AC Module
FP1917

20308636 19
AVFLST Vent Free Fireplace SIGNATURE COMMAND®SYSTEM OPERATION
Intermittent/Standing Pilot Setup (Default intermit-
tent)
1. Holding the ON button on the Command Center while
turning on the master switch will toggle between stand-
ing pilot and intermittent pilot.
2. After the above operation, one beep (for standing pi-
lot) or two beeps (for intermittent pilot) will be given as
conrmation.
Six-hour Safety Shutdown Option (Default ON)
1. The system comes preset from the factory with a six (6)
hour shutdown from its last command of operation.
This is done to prevent the replace from continuing to
operate if unattended. You may disable this feature if
you wish.
NOTE: By disabling this feature, your replace may con-
tinue to operate unattended.
2. When the master switch is in the ON position (“-”),
pressing the ON button and the OFF button on the
Command Center simultaneously will toggle between
enabling and disabling the six-hour shutdown option.
3. After the above operation, one beep (for enabling the
six-hour shutdown option) or two beeps (for disabling
the six-hour shutdown option) will be given as conrma-
tion.
Remote Transmitter Learn Function (Default OFF)
1. The RF receiver button located on the Control Board
must be in the on position before the learn function can
begin. Use paper clip to depress button. One beep for
RF receiver ON or two beeps for RF receiver OFF will
be given as conrmation. Refer to Figure 17 for location.
2. After the RF receiver is on, holding the OFF button on
the Command Center while turning on the master switch
will activate the learn function for the transmitter.
3. After the above operation, two beeps will be given and
the green LED on the Command Center will ash for
10 seconds.
4. During the 10 seconds, press the OFF button on a
transmitter to learn. Another two beeps will be given
to conrm a successful learning. Refer to transmitter
instructions for remote operations.
Shutting Off the Standing Pilot (Temporary Shut Off)
To shut off the standing pilot for service or summer shut
down, press and hold the ON button on the Command
Center for 3 seconds when the master switch is in the ON
position (“-”) and the main burner is off.
Note: Pilot will resume the next time system is turned
on.
Key Combinations for System Settings
NOTE: When On/Off wall switch is used, it must be in the
On position to perform all system setups.
FUNCTION OPERATION DEFAULT SETTING
Intermittent/Standing Pilot
Setup
Hold the ON ébutton while turning the master switch
(It will beep once for standing pilot, twice for intermittent pilot.)
INTERMITTENT
PILOT
Standing Pilot
Temperature Shutoff
Hold the ON ébutton for 3 seconds (when the master switch on
the main burner is off.)
RF Remote Receiver
ON/OFF
Push the RF receiver ON/OFF button on the control board.
(It will beep once for On and twice for OFF.)
RF OFF
Learn Remote
Transmitter
Hold the OFF ê button while turning on the master switch
(Listen for two beeps, then press any button on the remote.)
6-Hour Safety
Shutdown Setup
Press the ON é button and OFF ê button simultaneously
(It will beep once for ON, twice for OFF.)
ON
SIGNATURE COMMAND®SYSTEM FUNCTION SETTINGS

20 20308636
AVFLST Vent Free Fireplace
FUNCTIONS/OPERATION
(from the Command Center)
Turning on the replace
1. Turn on the master switch and wait for a beep.
2. Press the ON button on the Command Center or turn
on wall switch. Pilot will light and burner will come on
High setting or last memory setting (See Turning Off
Fireplace below). For memory feature.
Pilot Safety Lockout Function
1. If the pilot doesn’t light after sparking for 30 seconds, pilot
trial lockout happens. The LED on the Command Center
ashes Green once every 2 seconds, until reset.
2. If the pilot ame is lost during normal operation, the
system will try three (3) times to relight after three (3)
failures, ame loss lockout happens. The LED on the
Command Center ashes Red-Green once every 2
seconds, until reset.
3. Turning the master switch on the Command Center to
the off position, then ON again will reset the system.
Flame Height Control
1. Press the ON button (on the Command Center) once
to turn on the main burner with maximum ame height.
SIGNATURE COMMAND®SYSTEM OPERATION
2. Press the OFF button to decrease ame height. The rst
two presses will decrease the ame height to medium
and low.
3. The third press on OFF will turn off the main burner. In
standing pilot conguration, the pilot will stay; in inter-
mittent pilot conguration, the pilot will be shut off.
Turning the Off Fireplace
There are three ways to turn off the replace.
1. Flip the master switch to the off (“O”) position. (This will
turn the entire system OFF.)
2. Press the OFF button to Medium, Low, then Off.
3. Hold the OFF button anytime for three seconds or by
turning off the wall switch. These two commands of
OFF are (Memory Off) the system will remember all last
settings before turning off. The next time the replace is
turned on, all settings will resume. To reset, change to
the desired settings and shut off by using the Memory
Off commands and the system will be reset to those
new settings.
NOTE: After turning off there may be up to a two (2)
minute delay before the burner can be re-lit. There will
be three (3) red ashes if the on button is pressed before
the safety control is automatically reset.
SELF DIAGNOSTICS CHART:
The Command Center has a self-diagnostic LED enabling you to troubleshoot problems and potentially avoid a service
call. Please refer to the chart below for indicator reference.
FAULT LED INDICATOR
Conversion Cover Missing One RED (1 time)
Spark Fail Two RED (1 time)
No Sensor Signal Three RED (1 time)
Pilot Lockout – trial One GREEN, every 2 seconds until manual reset
Pilot Lockout – ame loss One RED-GREEN every 2 seconds until manual reset
Low Battery One RED every 10 seconds continuously
No or Low Thermopile Power Two RED every 10 seconds continuously
Learning GREEN ashes every 1 second for 10 seconds
AC Power On GREEN solid
Pressure Switch Failed (Power Vent only) One RED every 2 seconds until manual reset
FUNCTION OPERATION
Power Up Flip the master switch to ON ("_") position to power up the system.
Fireplace ON Press the ON ébutton on the Command Center or turn on wall switch.
Fireplace OFF Flip the master switch to the OFF ("o") position OR press the OFF ê button 3
times OR for Memory Off, hold the OFF ê button 3 seconds, or turn off wall switch.
Flame Height Up Press the ON button once to turn on the replace with maximum ame height.
Flame Height Down Press the OFF button to lower the ame height to Medium and Low.
COMMAND CENTER OPERATIONS:
The following functions are available on the Command Center.