VENT-FREE FIREPLACE
SYSTEMS
INST ALLATION AND OPERATING
INSTRUCTIONS
MODELS:
DFS32NVC, DFS32PVC
DFS36NVC, DFS36PVC
DFS42NVC, DFS42PVC
If the information in this manual is not followed
exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
WARNINGS
WARNINGS
This is an unvented gas-fired
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 10.
READ AND SAVE THESE INSTRUCTIONS
– Do not store or use gasoline or other fl 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.
• 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
fi re department.
– Installation and service must be performed by
a qualifi ed installer, service agency or the gas
supplier.
CONTENTS
Important Safety Information ................................ 3
Product Features .....................................................5
Operation .............................................................. 5
Specifi cations .......................................................... 7
Ignition Controls .................................................... 7
Pilot .......................................................................7
Thermal Generator ................................................7
Getting Started .........................................................8
General Installation Information ............................9
Firebox Dimensions .............................................. 9
Codes ..................................................................10
Adequate Combustion and Ventilation Air...........10
Removing Screen ...............................................12
Installing Canopy ................................................12
Location of Fireplace ............................................13
Clearances and Height Requirements .................14
Fireplace Framing..................................................15
Connecting the Gas ...............................................17
Checking Gas Pressure ........................................18
Milli-Volt Control ..................................................18
Electrical Wiring (Milli-Volt) ..................................19
Connecting Optional Wall Switch ........................19
Connecting Remote Receiver ............................. 20
Checking System Operation ...............................20
Log Placement .......................................................21
Flame Appearance .................................................25
Checking the Burner Flame .................................26
Operating Instructions ..........................................27
For Your Safety Read Before Lighting ................27
Milli-Volt Control Lighting Instructions .................28
Match Lighting Instructions .................................29
Cleaning and Servicing .........................................29
Blower and Other Optional Equipment ...............30
Illustrated Parts Breakdown .................................31
Logs .................................................................... 31
Heater ................................................................. 32
Cabinet ................................................................34
Troubleshooting ....................................................36
Trim Installation .....................................................38
Using Optional Outside Air Kit .............................40
Warranty .................................................Back Cover
2 71D0532
IMPORTANT SAFETY INFORMATION
INSTALLER
Please leave these instructions with the appliance.
IMPORTANT
Read these instructions carefully before installing or trying to operate this vent-free gas heater.
• 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 fi re,
burns, explosion or carbon monoxide poisoning.
• Do not allow fans to blow directly into the fi replace. Avoid any drafts that alter
burner fl ame patterns.
WARNING
• Do not use a blower insert, heat exchanger insert or other accessory, not approved
for use with this heater where applicable.
1. Due to high temperatures, the appliance should
be located out of traffic 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 flammable 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 qualified
service person.
7. 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 passageways be kept clean.
8. 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 immediately. Have the heater
serviced as it may not be operating properly.
OWNER
Please retain these instructions for future reference
10. This unit complies with ANSI Z21.11.2 Unvented
Heaters.
11. Do not install the heaters in a bathroom or bedroom.
12. Correct installation of the ceramic fiber logs, proper
location of the heater, and annual cleaning are necessary
to avoid potential problems with sooting. Sooting,
resulting from improper installation or operation,
can settle on surfaces outside the fireplace. See log
placement instructions for proper installation.
13. Avoid any drafts that alter burner flame patterns. Do not
allow fans to blow directly into fireplace. Do not place
a blower inside burn area of firebox. Ceiling fans may
create drafts that alter burner flame patterns. Sooting
and improper burning will occur.
14. Caution: Candles, incense, oil lamps, etc. produce
combustion byproducts including soot. Vent-free
appliances will not filter or clean soot produced by
these types of products. In addition, the smoke and/or
aromatics (scents) may be reburnt 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.
15. This is an unvented gas-fired heater. It uses air (oxygen)
from the room in which it is installed. Provisions
for adequate combustion and ventilation air must be
provided. See page 10.
16. Keep room area clear and free from combustible
materials, gasoline and other flammable vapors and
liquids.
.
9. The installation must conform with local codes or, in
the absence of local codes, with the National Fuel Gas
Code, ANSI Z223.l/NFPA54.
71D0532 3
Continued on page 4
IMPORTANT SAFETY INFORMATION
Continued from page 3
17. Unvented gas heaters are a supplemental zone heater.
They are not intended to be the primary heating appliance.
18. 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.
19. During manufacturing, fabricating and shipping, various
components of this appliance are treated with certain
oils, films or bonding agents. These chemicals are not
harmful but may produce annoying smoke and smells
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.
20. 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.
24. Never burn solid fuels in a fireplace where a unvented
room heater is installed.
25. Always have a fireplace screen in place when the
appliance is in operation and, unless other provisions
for combustion air are provided, the screen must have
an opening(s) for induction of combustion air.
THIS APPLIANCE MAY BE
INSTALLED IN AN AFTERMARKET , PERMANENTL Y LOCA TED,
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.
21. 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).
22. 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).
23. Do not use this room heater if any part has been under
water. Immediately call a qualified 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.
4 71D0532
Screen
PRODUCT FEATURES
On/Off Switch
Piezo
Control
Knobs
Figure 1 - Access to Controls
This vent-free fireplace must be mounted on the floor or on the optional fireplace hearth.
OPERATION
This unvented gas heater requires no outside venting and burns cleanly with high heating efficiency.
This zero-clearance unvented gas heater can be installed against (or recessed into) any wall that is accessible to
a gas line.
71D0532 5
PRODUCT FEATURES
NATURAL GAS
Milli-Volt Pressure
Regulator Pressure Setting: 3.5" w.c.
Pilot Regulator: 3.5" w.c.
Gas Inlet Pressure: Max. 10 1/2" w. c.
Min. 5" w.c.
Gas Rate
Model Number Control Max BTU/Hr Min BTU/Hr
DFS32NVC MILLI-VOLT 38,000 26,000
DFS36NVC MILLI-VOLT 38,000 26,000
DFS42NVC MILLI-VOLT 38,000 26,000
PROPANE/LPG
Note: An external regulator is required to reduce supply pressure to a maximum of 13" w.c.
Milli-Volt Pressure
Regulator Pressure Setting: 10" w.c.
Gas Inlet Pressure: Max. 13" w.c.
Min. 11" w.c.
Gas Rate
Model Number Control Max BTU/Hr Min BTU/Hr
DFS32PVC MILLI-VOLT 34,000 26,000
DFS36PVC MILLI-VOLT 34,000 26,000
DFS42PVC MILLI-VOLT 34,000 26,000
6 71D0532
SPECIFICATIONS
IGNITION CONTROLS
Piezo ignitor allows ignition of the pilot without the use of matches or batteries.
Milli-Volt control has four (4) positions:
OFF - All gas to the gas logs is shut off at the valve.
IGN - Valve position to light/maintain a standing pilot.
ON - Valve position to turn ON/OFF log set with remote switch/thermostat.
LOW/HI - Variable position to control flame height (heat output). Both front and rear burners are in operation
to provide realistic glow and yellow flame.
PILOT
The gas log heater is fitted with a specially designed safety pilot light (ODS assembly) which senses the amount of oxygen
available in the room and shuts the gas log heater off if the oxygen level begins to drop below a satisfactory level. The pilot
can only be relit when adequate fresh air is available.
THERMAL GENERATOR
The milli-volt gas log pilot is fitted with a milli-volt generator to provide power for remote activation.
71D0532 7
GETTING STARTED
MAKE SURE YOU HAVE RECEIVED ALL PARTS:
Check your packing list to verify that all listed parts have been received. You should have the following:
• Unvented gas log grate/burner assembly
• Installation/operating instructions
• Ceramic fiber logs
• Rock wool
• Plastic bag containing crushed volcanic rock
• Trim kit
• Canopy and five (5) mounting screws
The milli-volt controlled version of this heater is the only style designed to be operated with optional devices for ON/OFF
functions. The following options may be used with the milli-volt controlled heater. These options are not packaged with
the log set.
• Hand held remote with receiver
• Wall switch with 15' wire
• Wall thermostat with 15' wire
• Hand held thermostat remote with receiver
• Gloves are recommended when handling ceramic fi ber logs to prevent skin irritation
from loose fi bers. Logs are fragile — handle with care.
WARNING
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 proceeding with installation:
• External regulator (for propane/LPG and 1/2 lb. natural gas systems only)
• Piping which complies with local codes
• Pipe wrench or appropriate size crescent wrench set
• Pipe sealant approved for use with propane/LPG (Resistant to sulfur compounds)
• Sediment trap
• Manual shutoff valve
• Tee joint.
• Phillips head screwdriver
8 71D0532
L
J
K
5 7/16"
G
F
D
E
C
34 1/2"
H
A
B
I
1 1/4"
21 3/4"
6"
1 5/16"
2 1/2"
GENERAL INSTALLATION INFORMATION
In planning the installation for the fireplace 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, however, and might require a different sequence.
1. Position fireplace in desired location. Refer to the “Location of Fireplace” and “Clearances and Height Requirements,” and “Firebox Framing” sections found in this
manual. Note: Be sure all packing material has
been removed from underside of the unit.
2. Install canopy and logs per instructions found in
this manual. The canopy MUST be installed for safe
operation of the unit.
3. Field wire main power supply to units with fan kit.
Refer to the “Electrical Section” found in this manual.
(Electrical connections should only be performed by an
experienced, licensed certified tradesman).
4. Install optional ON/OFF kit on units with milli-volt
control. Refer to installation instructions included with
the kit and also refer to the “Electrical Wiring” section
found in this manual.
5. Plumb gas line. Refer to the “Connecting the Gas”
section found in this manual. (Gas connections should
only be performed by an experienced, licensed / certified
tradesman).
6. Complete finish wall material and/or surround.
DFS32NVC DFS36NVC DFS42NVC
DFS32PVC DFS36PVC DFS42PVC
A 37" 41" 47"
B 32" 36" 42"
C 16" 18" 18"
D 29" 32" 38"
E 18⅝" 20⅝" 20⅝"
F 23⅜" 27⅜" 33⅜"
G 13¼" 15¾" 15¾"
H 18" 17⅝" 17⅝"
I 29⅞" 34" 40"
J 7⅛" 9¾" 9¾"
K 8" 8¼" 8¼"
L 2¾" 2¼" 2¼"
Figure 2 - Firebox Dimensions with Screen and Log Sets
1 ¼"
5 7/16"
21 ¾"
2 ½"
6"
1 5/16"
71D0532 9
34 ½"
GENERAL INSTALLATION INFORMATION
CODES
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
Do not install the heater:
• Where curtains, furniture, clothing, or other fl ammable objects are less than 42"
from the front of the heater.
• In high traffi c areas.
WARNING
• In windy or drafty areas.
ADEQUATE COMBUSTION AND VENTILATION AIR
This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided
for adequate combustion and ventilation air.
The National Fuel Gas Code, (ANSI Z223.1/NFPA54), defines a confined space as a space whose volume is less than 50
cubic feet per 1,000 BTU per hour (4.8 m
space, and an unconfined 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 the unconfined space.
UNUSUALLY TIGHT CONSTRUCTION IS DEFINED 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 10
b) weather striping has been added on openable windows and doors, and
c) caulking or sealants are applied to areas such as joints around window and door frames, between sole plates
and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and gas
lines, and at other openings.
11
kg per pa/sec-m2) or less with openings gasketed or sealed;
3
per kw) of the aggregate input rating of all appliances installed in that
10 71D0532
GENERAL INSTALLATION INFORMATION
Counter
Fireplace
H
W
Figure 3 - Example of a Large Room with 1/2 Wall Divider
The following formula can be used to determine the maximum heater rating per the definition of unconfined space:
BTU/Hr =
(L1 + L2) Ft x (W) Ft x (H) Ft
x 1000
50
Consider two connecting rooms with an open area between, with the following dimensions:
1
1 = 15
L
BTU/Hr =
/2 Ft., L2 = 12 Ft., W = 12 Ft., H = 8 Ft.
(151/2 + 12) x (12) x (8)
x 1000 = 52800 BTU/Hr
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)
x 1000 = 29760 BTU/Hr
50
If the area in which the heater may be operated is smaller than that defi ned as an
unconfi ned space or if the building is of unusually tight construction, provide adequate
combustion and ventilation air by one of the methods described in the National Fuel
Gas Code, ANSI Z223.1/NFPA54, Section 5.3 or applicable local codes.
WARNING
WARNING
71D0532 11
GENERAL INSTALLATION INFORMATION
REMOVING SCREEN
Remove fireplace screen frame panel by pushing screen frame panel up and out. See Figure 4.
Do not operate the unit without
the screen frame panel and canopy
installed.
WARNING
Canopy
Fireplace
Screen
Figure 4 - Removing Fireplace Screen Frame Panel
NOTE: Fireplace screen must be removed to access log box and to install canopy.
INSTALLING CANOPY
1. Remove the fireplace screen as described in the previous section.
2. Align the canopy with the holes in the top frame. See Figure 5.
3. Secure screws as shown. See Figure 5.
4. Install and tighten side screws. Make sure the canopy is level and secure. Install the fireplace screen.
Figure 5 - Canopy Installation
12 71D0532
LOCATION OF FIREPLACE
Carefully select the best location for installation of your unvented fireplace. The following factors should be taken
into consideration.
• Clearance to side wall, ceiling, woodwork and window or other combustibles. Refer to “Clearances and Height Require-
ments” section on page 14. 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 traffic areas and away from furniture and draperies due to heat from firebox.
• Never obstruct the front opening of the unvented fireplace or restrict the flow of combustion and ventilation air.
• Minimize modifications to existing construction. See Figure 6 below for location suggestions.
• Do not install in the vicinity where gasoline or other flammable liquids may be stored. The unvented firebox must be
kept clear and free from the combustible materials.
Figure 6 - Suggested Locations
71D0532 13
CLEARANCES AND HEIGHT REQUIREMENTS
The dimensions shown in Figures 7 and 8 and defi ned in the fi replace manufacturer's
instructions 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
WARNING
instructions exactly can create a fi re hazard.
Sidewall and ceiling clearances: The clear-
ance from the inside of the appliance to any combustible adjacent wall should no be less than 9".
See Figure 7.
Ceiling clearance: The ceiling must be at least
42" from the top of the firebox opening. See Figure
7.
42" Minimum
Back wall clearance: The appliance may be
placed against a combustible back wall.
Floor clearance: The fireplace may not be
installed onto any combustible flooring material,
such as carpeting, vinyl or tile without the hearth
or a minimum 22 GA (0.030") metal or a minimum
1/2" wooden base covering the entire width and
depth of the base. Combustible material must be
installed at least one inch away from the front face
of the unit.
Mantel clearances: The canopy supplied with
the unit must be installed. If a combustible mantel
is installed. It must meet the clearance requirements
shown in Figure 8.
12"
10"
8"
Combustible material
can contact top of
fi replace.
6"
21/2"
21"
19"
16"
12"
23"
9"
Minimum
9"
Minimum
Figure 7 - Sidewall and Ceiling Clearances
Non-combustible
material only if needed to
cover optional radiant top
panel above canopy.
Figure 8B - Mantel Heights
Figure 8A - Minimum Mantel Clearances
14 71D0532
For Wide Brass Canopy. See pg. 35
F
FIREPLACE FRAMING
If unit is to be “built in,” fireplace framing can be built before or after the appliance is set in place. BE SURE THAT ALL
PACKING MATERIAL HAS BEEN REMOVED FROM THE UNDERSIDE OF THE UNIT PRIOR TO SETTING
THE FIREBOX IN PLACE. Construct fireplace framing following Figures 9 through 12. Refer to Figure 2 on page 9 for
fireplace dimensions. The framing headers may rest directly on top of the firebox.
The fireplace may be installed directly on a combustible floor or a raised platform of an appropriate height. Do not place
fireplace on carpeting, vinyl, tile or other soft floor coverings. It may, however, be placed on flat wood, plywood, particle
board or other hard surfaces. Be sure fireplace rests on a solid continuous floor or platform with appropriate framing for
support and so that no cold air can enter from under the firebox.
Anchor fireplace to the side framing members using optional nailing flange kit. See installation instructions included
with the kit.
D
H
C
A
E
Figure 9 - Corner Installation
G
Unfi nished/rough
framing surface
DFS32NVC DFS36NVC DFS42NVC
DFS32PVC DFS36NVC DFS42NVC
A 37¼" 41¼" 47¼"
B 35" 35" 35"
C 29" 32" 38"
D 14⅞" 16⅜" 19⅜"
E 61¾" 68⅞" 74⅞"
F 30⅞" 34½" 37½"
G 15½" 17½" 17½"
H 43¾" 48¾" 53"
C
Optional bottom radiant panel
cannot be covered. Optional top
radiant panel can be covered as
shown in Figure 8.
WARNING
B
A
Figure 11 - Stud Location
Unfi nished/rough
framing surface
Unfi nished/rough
framing surface
A
Figure 10- Inside Chase Installation
C
A
Figure 12- Recessed Installation
G
1
/2"or5/8"
or
equivalent
clearance
for drywall/
fi nishing
G
5
/8" or equivalent
clearance for
drywall/fi nishing
materials
71D0532 15
FIREPLACE FRAMING
When finishing a custom cabinet, mantel, or other built-in enclosure,
the opening size to accommodate the fireplace with trim installed
is as follows:
DFS32NVC DFS36NVC DFS42NVC
DFS32PVC DFS36PVC DFS42PVC
K 37⅞" 41⅞" 47⅞"
J 35⅞" 35⅞" 35⅞"
The fi replace must be installed giving
full consideration to the clearance and
height requirements identifi ed in this
WARNING
manual.
WARNING
K
J
Figure 13 - Custom Cabinet
1. Bend out the nailing flanges located on each side of the firebox.
2. Slide the firebox into prepared framing or position firebox in its final position and frame later.
3. Level the firebox by checking the top edge of the firebox. Shim if necessary.
4. Anchor firebox to the side framing members using 8d nails or other suitable fasteners. Refer to Figure 14.
5. The canopy must be installed for safe operation of the heater. Refer to page 12 for canopy installation details.
Nail Sides
Through Nailing
Flanges
Figure 14 - Location of Nailing Flanges
16 71D0532
CONNECTING THE GAS
NOTICE: A qualifi ed gas appliance installer must connect the heater to the gas supply. Consult all local
codes.
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 sulfi 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 fl 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
CAUTION
plugged
See Figure 15.
1
/8" NPT pressure tapping point should be installed upstream of the appliance.
To Heater
Valve
Stainless
Flexible Tube
Manual Shutoff
IMPORTANT: Hold heater valve firmly with a wrench to prevent movement when connecting to inlet pipe.
Pipe Coupling
Pipe
Valve
Figure 15 - Gas Connection
Locations that the Pressure
Tapping Point May Be Installed
Gas Supply
Inlet
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 INST ALL THE HEA TER. Contact your dealer
for the correct model.
WARNING
Always use an external regulator for all propane/LPG heaters and high pressure one to two-pound systems
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.
71D0532 17
CHECKING GAS PRESSURE
Connecting directly to an
unregulated propane/LPG tank
can cause an explosion.
WARNING
When tightening up 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.
Check the gas pressure with the appliance burning and the control set to HIGH.
MILLI-VOLT CONTROL (Figure 16)
The valve regulator controls the burner pressure which
should be checked at the pressure test point.
Turn captured screw counter clockwise two or three
turns and then place tubing to pressure gauge over
test point (Use test point “OUT” closest to control
knob). After taking pressure reading, be sure and turn
captured screw clockwise firmly to re-seal. Do not
over torque. Check for gas leaks.
Test Port “OUT”
Figure 16 - Pressure Test Point Location
Milli-Volt Control
18 71D0532
ELECTRICAL WIRING
The milli-volt valve is a self-powered combination gas control THAT DOES NOT REQUIRE 110 VAC TO
OPERATE.
Label all wires prior to disconnection
when servicing controls. Wiring
errors can cause improper and
dangerous operation. Verify proper
operation after servicing.
WARNING
ODS
Pilot
On/Off
Switch
ODS
Wall
Switch
On/Off
Switch
TH = 3
TP = 1
TP/TH = 2
Pilot
Valve
Spade
Terminal
Switch
Optional Wall
Figure 17 - Wiring Diagram
CONNECTING OPTIONAL WALL SWITCH
1. Use 18 awg, two-wire cable, 15 feet maximum length.
2. At one end of the cable, connect both wires to the wall switch or thermostat. At the other end, connect one wire to
TP/TH and one wire to TH, or connect the wall switch/thermostat to the two male (0.25") terminals on the left side of
the unit. The color of the wires does not matter.
71D0532 19
Switch or Remote
Receiver
ELECTRICAL WIRING
CONNECTING REMOTE RECEIVER
THESE INSTRUCTIONS SUPERCEDE THE SECTION
ENTITLED “HEARTH MOUNT” IN THE MILLI-VOLT
HAND-HELD REMOTE INSTRUCTIONS SUPPLIED
WITH THE REMOTE.
1. Remove cover on control panel to show opening for remote
receiver. See Figure 18.
2. Connect the remote connectors located in the unit.
3. Slide remote receiver in the opening of control panel. Use
two screws provided to attach remote receiver to the control
panel. See Figure 18.
4. Replace Cover.
NOTE: Do not place remote in combustion chamber.
Remote
Receiver
Cover
Figure 18 - Installing Remote Receiver
CHECKING SYSTEM OPERATION
The milli-volt system and individual
components may be checked with a milli-
CONNECT SWITCH OR
CHECK TO METER THERMOSTAT METER
TEST TEST LEADS TO CONTACTS READING
TERMINALS SHOULD BE
volt meter having a 0-1000 mV range.
Conduct each check shown in chart below
by connection meter test leads to terminals
as indicated.
A COMPLETE 2 & 3 CLOSED CLOSED
SYSTEM
B THERMOPILE 1 & 2 OPEN OPEN
OUTPUT
A. COMPLETE MILLI-VOLT SYSTEM CHECK
(“A” Reading - Thermostat contacts CLOSED - Control Knob “ON” - Main burner should turn ON)
a. If the reading is more than 100 milli-volts and the automatic valve still does not come on, replace the control.
b. If the closed circuit reading (“A” reading) is less than 100 millivolts, determine cause for low reading, proceed
to Section B below.
B. Thermopile Output Reading Check
(“B” Reading - Thermostat contacts OPEN - Main burner OFF)
1. Check gas pressure to the unit. If gas pressure is within minimum and maximum on data plate, then check pilot
voltage, 325 millivolts minimum. If the minimum milli-volt reading is not obtainable, replace pilot.
20 71D0532
LOG PLACEMENT
Before you begin — This unit is supplied with six (6) ceramic fiber logs. Do not handle these logs with your bare hands.
Always wear gloves to prevent skin irritation from ceramic fibers. After handling the logs, wash your hands gently with
soap and water to remove any traces of fibers.
The positioning of the logs is critical to the safe and clean operation of this heater. Sooting
and other problems may result if the logs are not properly and fi rmly positioned in the
appliance. Never add additional logs or embellishments such as pine cones, vermiculite or
rock wool to the heater. Only use the logs and EB-RW (rock wool) supplied with the unit.
Failure to position the parts in accordance with diagrams below or to use only parts
WARNING
specifi cally approved for this heater may result in property damage or personal injury.
INSTALLING CHARRED TIMBER LOGS ON
BURNER
1. Place rear log (#1) on two
located pins on the back of
the grate. See Figure 19.
Rear Log (#1)
Pins
2. Place right base log (#2) on two
pins on right side of grate.
See Figure 20.
Figure 19 - Installing Rear Log (#1)
Right Base Log (#2)
Figure 20 - Installing Right Base
Log (#2)
Pins
71D0532 21
LOG PLACEMENT
3. Place left base log (#3) on two pins on left side of grate.
See Figure 21.
Left Base Log
(#3)
Pins
Figure 21 - Installing Left Base Log (#3)
Right Front Log (#4)
4. Place right front log (#4) on two pins on bottom right side of grate.
See Figure 22.
Pins
Right Front Log (#4)
Figure 22 - Installing Right Front Log (#4)
22 71D0532
LOG PLACEMENT
5. Place right end of left top log (#5) on bottom center grate pin. Place left end of left top log (#5) on top of the left base
log. See Figure 23.
Left Top Log
(#5)
Pin
Bottom Center Pin
Figure 23 - Installing Left Top Log (#5)
71D0532 23
LOG PLACEMENT
7. Place right top log (#6) on two pins to the left of right base log. See
Figure 25.
Right Top Log (#6)
Figure 25 - Installing Right Top Log (#6)
PLACING ROCK WOOL
After installing logs, place TPB-RW (Rock
Wool) in dime-size pieces evenly across the
burner surface in between the logs. Do not add
additional rock wool. See Figure 26 for the approximate area to place rock wool.
Wash hands after placing rock wool. Itching
may occur.
• Use only TPB-RW
provided with log set.
• Do not add additional
rock wool.
WARNING
Pins
.
Dime-Size
Rock Wool
Right Base
Log
Figure 26 - Placing Rock Wool
24 71D0532
FLAME APPEARANCE
Flames from the pilot, front and rear burner should be visually checked as soon as the heater is installed.
In addition, periodically check the flames visually during operation.
CHECKING THE PILOT FLAME
The pilot fl ame must always be present when the heater is in operation. It should just touch the top of the thermo-
couple tip for natural. See Figure 27 for correct pilot flame.
If the pilot flame does not touch the thermocouple, then the main burner cannot function reliably. See Figure 28 for incorrect shape of pilot flame.
MILLI-VOLT CONTROL
Thermocouple
for Natural
Thermocouple
for LP
Figure 27 - Correct Appearance of Pilot Flame
Thermocouple
for Natural
Thermocouple
for LP
Figure 28 - Incorrect Appearance of Pilot Flame
71D0532 25
CHECKING THE BURNER FLAME
In normal operation at full rate after 15 minutes, the following fl ame appearances should be observed:
Figure 29 - Correct Appearance of Rear Flames of Charred Timber
Burner will have a random pattern of yellow flames as shown in Figure 29. There should be glowing embers on the front
burner. Note: The front fl ames and embers will be an opaque orange color during the burn off time.
26 71D0532
OPERATING INSTRUCTIONS
FOR YOUR SAFETY READ BEFORE LIGHTING
If you do not follow these instructions
exactly, a fi re or explosion may result
causing property damage, personal
injury or loss of life.
WARNING
A. This appliance is equipped with an ignition device which automatically lights the pilot. Do not try
to light the unit by hand.
B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor
because some gas is heavier than air and will settle on the floor.
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 fire department.
C. Use only your hand to push in, or turn the gas control knob. Never use tools. If the knob will not push
in or turn by hand, don't try to repair it. Call a qualified service technician. Force or attempted repair
may result in a fire or explosion.
D. Do not use this appliance if any part of it has been under water. Immediately call a qualified service
technician to inspect the appliance and to replace any part of the control system and any gas control
that has been under water.
On/Off Switch
Piezo
Ignitor
Control Knobs
Figure 30 - Location of Piezo Ignitor, Control Knobs and Switch on Milli-Volt Unit
71D0532 27
OPERATING INSTRUCTIONS
MILLI-VOLT CONTROL
LIGHTING INSTRUCTIONS
1. STOP! Read the safety information label.
2. Make sure the manual shutoff valve is fully open.
3. This gas log set is equipped with an ignition device (piezo) which automatically lights the pilot. If piezo
ignitor does not light the pilot, refer to instructions for “Match Lighting Instructions,” page 29.
4. Turn gas control knob clockwise to the OFF position, and turn ON/OFF switch to OFF position.
5. Wait (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas,
STOP! Follow “What to Do if You Smell Gas,” page 27. If you don't smell gas, go to next step.
6. From OFF position, turn the gas control knob counterclockwise
in control knob for 5 seconds. NOTE: If you are running the heater for the fi rst time, it
will be necessary to press in the control knob for 30 seconds to allow air to bleed
out of the gas piping.
7. With the control knob pushed in, push in and release the piezo ignitor button to light the pilot.
8. Continue pushing the control knob in for a further 60 seconds to prevent the flame detector from shutting
off the gas while the probe is warming up. Release the control knob.
9. Turn gas control knob counterclockwise
10. After the pilot has been lit for one minute, the burners can be turned on. Turn the ON/OFF switch to
ON position or adjust thermostat to desired setting.
11. If the gas logs will not operate, follow the instructions “To Turn Off Gas To Heater” below and call
your service technician or gas supplier.
Hi/Lo Control
to the ON position.
to IGN position. Push
On/Off Switch
Ignitor Pilot Control
Piezo
Figure 31 - Pilot
TO TURN OFF GAS T O HEATER
1. Turn control knob clockwise to OFF position to completely shut off the heater.
2. If applicable: Turn ON/OFF switch to OFF position and/or set thermostat (if present) to lowest setting.
3. If applicable: Turn off all electric power to the heater.
28 71D0532
Figure 32 - Control Cover Plate for Milli-Volt
OPERATING INSTRUCTIONS AND CLEANING AND SERVICING
MATCH LIGHTING INSTRUCTIONS
1. Remove any items necessary for easy access to the pilot (for example: logs, screens, etc.).
2. Follow appropriate lighting instructions found previously. Instead of pushing and releasing the piezo
button, light a match and hold the flame to the end of the pilot and ignite the pilot.
3. After control knob has been released and pilot stays lit, reinstall any items that were removed for pilot
access.
4. Call a qualified service technician for repair or replacement of the piezo ignitor.
CLEANING AND SERVICING
Annual inspection and cleaning by your dealer or qualifi ed service technician is recommended to
prevent malfunction and/or sooting.
T urn off heater and allow to cool before
cleaning. Disconnect electrical power
before cleaning or servicing.
WARNING
Remove logs, handling carefully by holding gently at each end. Gloves are recommended to prevent skin irritation from
ceramic fibers. If skin becomes irritated, wash gently with soap and water. Refer to manual for correct log placement.
PERIODIC CLEANING - Refer to parts diagram for location of items discussed below.
• Do not use cleaning fluid to clean logs or any part of heater.
• Brush logs with soft bristle brush or vacuum with brush attachment.
• Vacuum loose particles and dust from the front and rear burner, control and piezo covers and grate weldment.
• Inspect and clean burner air intake holes. Remove lint or particles with vacuum, brush, or pipe cleaners. Failure to keep
air intake holes clean will result in sooting and poor combustion.
• External case should be dusted and wiped with a wet soapy cloth.
ANNUAL CLEANING/INSPECTION - Refer to parts diagram for location of items discussed below.
• Inspect and clean burner air intake holes. Remove lint or particles with vacuum, brush or pipe cleaners. Failure to keep
air intake holes clean will result in sooting and poor combustion.
• Inspect and clean all burner ports.
• Inspect ODS pilot for operation and accumulation of lint at air intake holes.
• Verify flame pattern and log placement for proper operation.
• Verify smooth and responsive ignition of main burner and rear burner.
71D0532 29
BLOWER AND OTHER OPTIONAL EQUIPMENT
OPTIONAL EQUIPMENT
FORCED AIR KIT
If you are installing the forced air kit, Model BLOTMC, see the installation instructions provided with the kit for
electrical wiring requirements, or the blower installation section. The firebox must be connected to main power
supply at time of firebox installation. The blower must be installed prior to the installation of the unvented heater.
The electrical connections must be made before the firebox is framed and enclosed in the finished walls.
OPTIONAL TRIM
Optional brass or pewter trim kits can be used in place of the factory supplied black trim.
OPTIONAL BRICK
Optional Cottage Clay and Cottage Red firebrick kits can be installed. Refer to installation instructions provided
with kit.
Electrical connections should only be performed by a qualifi ed, licensed electrician,
main power must be off when connecting to main electrical power supply or performing
service.
WARNING
CAUTION
30 71D0532
REPLACEMENT PARTS ARE AVAILABLE THROUGH YOUR RETAILER.
CHARRED TIMBER LOGS
Item Description Qty 24
1 Rear Log 1 70D0031
2 Right Base Log 1 70D0032
3 Left Front Base Log 1 70D0033
4 Right Front Log 1 70D0037
5 Left Top Log 1 70D0065
6 Right Top Log 1 70D0034
ILLUSTRATED PARTS BREAKDOWN
#4
#5
#3
Failure to position the parts in
accordance with these diagrams or
failure to use only parts specifi cally
approved with this appliance may
result in property damage or personal
WARNING
injury.
#6
#2
#1
71D0532 31
ILLUSTRATED PARTS BREAKDOWN
Failure to position the parts in accordance with these diagrams or failure to use only
parts specifi cally approved with this heater may result in property damage or personal
injury.
WARNING
5
6
3
9
4
7
2
1
10
11
8
32 71D0532
REPLACEMENT PARTS ARE AVAILABLE THROUGH YOUR RETAILER.
BURNER ASSEMBL Y
REPLACEMENT PARTS LIST
TPB24
Item Qty
1 Piezo Ignitor 1 14D0503 14D0503
2 Piezo Wire 1 00K0632 00K0632
3 Burner 1 70D0010 70D0010
4 Control Valve 1 14D0467 14D0468
5 Injector 1 70D0064 57D0680
6 ODS Pilot Assembly 1 14D0473 14D0477
7 On/Off Switch 1 32D0232 32D0232
8 Pilot Regulator 1 14D0469 —
9 Hi/Lo Knob 1 37D0011 37D0011
10 Pilot On/Off Knob 1 37D0010 37D0010
11 Control panel 1 54D0233 54D0233
Natural Propane
ACCESSORIES SOLD SEPARATELY
Description Part Number
Wall Thermostat Kit WT
Remote (On/Off) RCB, RCM, WMTD
Thermostat Remote RCST, RCT, WWTD
Remote Receiver Cover Ember RRCE
Remote Receiver Cover Metal RRCM
Remote Touch Light (On/Off) TLM
Remote Touch Light T-stat TLT
Cast Iron Gate and Andirons
Rock Wool Bag TPB24-RW
CIGA
(do not fi t DFS32)
71D0532 33
ILLUSTRATED PARTS BREAKDOWN
3
4
7
1
6
5
4
5
2
6
8
3
4
9
Failure to position the parts in accordance with these
diagrams or failure to use only parts specifically
approved with this appliance may result in property
damage or personal injury.
6
7
WARNING
34 71D0532
REPLACEMENT PARTS LIST
REPLACEMENT PARTS ARE AVAILABLE THROUGH YOUR RETAILER.
DFS32C DFS36C DFS42C
Item Description Qty
Standard Features
1 Canopy 1 71D0023 71D0500 71D1000
2 Screen Assembly 1 71D0075 71D0545 71D1026
4 Black Trim Kit 1 BLMTK32C BLMTK36C BLMTK42C
Feature Options
3 Brass Louver Kit 1 L32BR L36BR L42BR
3 Pewter Louver Kit 1 L32PW L36PW L42PW
3 Black Louver 6 26D0695 26D0697 26D0699
7 Blower with Rheostat 1 BLOTMC BLOTMC BLOTMC
Accessories
4 Curved Design Brass Trim 1 BRTK32C BRTK36C BRTK42C
4 Curved Design Pewter Trim 1 PWTK32C PWTK36C PWTK42C
4 Curved Design Black Trim 1 BLTK32C BLTK36C BLTK42C
4 Brass Trim Kit 1 BRMTK32C BRMTK36C BRMTK42C
4 Pewter Trim Kit 1 PWMTK32C PWMTK36C PWMTK42C
5 Cottage Red Firebrick 1 FB32CR FB36CR FB42CR
6 Outside Air Kit 1 AK-4 AK-4 AK-4
1 Wide Brass Canopy 1
BRC32 BRC36 BRC42
71D0532 35
TROUBLESHOOTING
Note: All troubleshooting items are listed in order of operation.
Turn appliance OFF and allow to cool
before servicing. Only a qualified
service person should service and
repair the heater.
WARNING
WARNING
OBSERVED PROBLEM
When ignitor button is pressed,
there is no spark at ODS/pilot.
Appliance produces unwanted
odors.
Appliance shuts off during use.
POSSIBLE CAUSE
1. Ignitor electrode positioned wrong.
2. Ignitor electrode is broken.
3. Ignitor electrode not connected to ignitor
cable.
4. Ignitor cable pinched or wet. Keep ignitor cable
dry.
5. Broken ignitor cable.
6. Bad piezo ignitor.
1. Appliance burning vapors from paint, hair
spray, glues, etc.
2. Gas leak.
3. Initial burn off.
1. Not enough fresh air is available for ODS/
pilot to operate.
2. Low line pressure.
3. ODS/pilot is partially clogged.
4. Defective Thermopile.
5. Restrictions in incoming air flow.
REMEDY
1 Replace ignitor.
2. Replace ignitor.
3. Reconnect ignitor cable.
4. Free ignitor cable if pinched by any
metal or tubing.
5. Replace ignitor cable.
6. Replace piezo ignitor.
1. Ventilate room. Stop using odor causing
products while heater is running.
2. Locate and correct all leaks.
3. Ventilate room and turn unit on high
until odor is gone. Odor should be gone
after 6 hours of continuous use.
1. Open window and/or door for ventilation.
2. Contact local gas company.
3. Clean ODS/pilot.
4. Check pilot flame, check wire connections, check output, should be 325 millivolts across TH/TP and TP Terminals
with ON/OFF switches off.
5. Check for bottom riser on glass door,
sunken fireplace, excessive lava rock/
cinders densely packed against grate.
Gas odor even when control
knob is in OFF position.
When ignitor button is pressed,
there is spark at ODS pilot, but
no ignition.
36 71D0532
1. Gas leak.
2. Control valve defective.
1. Gas supply turned off or manual shutoff valve
closed.
2. Control knob not in PILOT position.
3. Control knob not pressed in while in PILOT
position.
4. Air in gas lines when installed.
5. ODS/pilot is clogged.
6. Gas regulator setting is not correct.
1. Locate and correct all leaks.
2. Replace control valve.
1. Turn on gas supply or open manual
shutoff valve.
2. Turn control knob to PILOT position.
3. Press in control knob while in PILOT
position.
4. Continue holding down control knob.
Repeat igniting operation until air is
removed.
5. Replace ODS/pilot assembly or get it
serviced.
6. Replace gas regulator.
TROUBLESHOOTING
If the gas quality is bad, your pilot may not stay lit, the burners may produce soot and
the heater may backfi re when lit. If the gas quality or pressure is low, contact your local
gas supplier immediately.
WARNING
OBSERVED PROBLEM
ODS/pilot lights, but flame
goes out when control knob is
released.
Burner does not light after ODS/
pilot is lit.
Burner backfires during combustion.
Slight smoke or odor during
initial operation.
POSSIBLE CAUSE
1. Control knob not fully pressed in.
2. Control knob not pressed in long enough.
3. Manual shutoff valve not fully open.
4. Thermocouple connection loose at control
valve.
5. Pilot flame not touching thermocouple, which
allows thermocouple to cool, causing pilot
flame to go out. This problem could be caused
by either low gas pressure, or a dirty or
partially clogged ODS/pilot.
6. Thermocouple damaged.
7. Control valve damaged.
1. Burner orifice is clogged.
2. Burner orifice diameter is too small.
3. Inlet gas pressure is too low.
1. Manifold pressure is too low.
2. Burner orifice is clogged.
1. Burner orifice is clogged or damaged.
2. Burner is damaged.
3. Gas regulator defective.
REMEDY
1. Press in control knob fully.
2. After ODS/pilot lights, keep control
knob pressed in for 30 seconds.
3. Fully open manual shutoff valve.
4. Hand tighten thermocouple connection
until snug, then tighten 1/4 turn more.
5a. Contact local gas company.
5b. Clean pilot with vacuum cleaner.
6. Replace thermocouple.
7. Replace control valve.
1. Clean orifice.
2.
Replace burner orifice.
3.
Contact qualified service person.
1. Contact local gas company.
2. Clean burner or replace burner orifice.
1. Clean burner or replace burner orifice.
2. Replace burner.
3. Replace gas regulator.
Logs appear to smoke after initial operation.
Heater produces a whistling
noise when burner is lit.
No gas to pilot.
71D0532 37
1. Vapors from paint or curing process of logs.
2. Vapors or smoke continue after heater has
run with damper or window open for several
hours.
1. Turning control knob to HIGH position when
burner is cold.
2. Air in gas line.
3. Dirty or partially clogged burner orifices.
1. LP-regulator shut down due to inlet pressure
too high.
1. Problem will stop after a few hours
of operation. Run the heater with the
damper open if you have one, or open a
window for the first few hours.
2. Log heater is intended to be smokeless.
Turn OFF heater and call qualified
service person.
1. Turn control knob to LOW position and
let warm up for a minute.
2. Operate burner until air is removed from
line. Have gas line checked by local
gas company.
3. Clean burner or replace burner orifice.
1. Verify LP tank regulator is installed and
set at 11" to 13" w.c.
2. Replace regulator on heater.
TRIM INSTALLATION
1. Remove top and bottom louver assemblies by disengaging hooks. Pull assemblies up and away from unit.
See Figure 33.
2. Remove canopy by removing screws and pulling canopy away from unit. See Figure 34.
3. Set bottom trim kit piece in place on bottom of face. Bottom piece will be held in place by the side pieces.
See Figure 34.
Figure 33 Figure 34
4. Loosely install four supplied screws
into left and right sides of unit face.
Leave approximately 1/8th in. of
screw shaft protruding from unit
in each location. See Figure 35.
5. Set left and right side piece of trim
kit in place on unit. Lean the top of
each piece away from the unit and
towards you in order to install top
trim kit piece. Top piece should
fi t with sides as shown.
See Figures 36, 37 & 38
Figure 35
38 71D0532
TRIM INSTALLATION
6. Hold trim kit together by gripping the top left and right corners. Tilt trim kit away from you and into place
snugly against unit. Tighten screws installed in step 4.
Figure 37
Figure 38
Figure 36
7. Secure the top trim piece to unit by installing
supplied screws. See Figure 39.
8. Secure canopy back in place on unit.
Figure 39
71D0532 39
FOR USE OF OPTIONAL AK-4 OUTSIDE AIR KIT
COMBUSTION AIR
1. Locate combustion air assembly at an exterior location which is not likely to be accidentally blocked in any manner.
Locate assembly a min. of 12" above the snow line to prevent blockage by snow accumulation.
2. Never mount the combustion air inlet assembly in a garage or storage area where combustible fumes such as gasoline
might be drawn into the fi replace.
3. Combustion air can be drawn from the crawl space under a house when an adequate supply of air is provided by open
ventilation.
4. CAUTION: Do not take combustion air from attic space or garage space.
5. Locate air supply inlet at least 3' away from any appliance vent terminal.
6. Avoid extremely long runs and numerous turns in the duct leading from the fi replace to the combustion air assembly.
These conditions increase the resistance to the free fl ow of air through the duct. See Figures 40 through 43 for methods
of installing the outside air for combustion assemblies.
Note: Fireplace model in illustrations may not be representative of your appliance.
Basement
Above
Wall
Snow
Level
Inlet Grill in
8'max.
Soffi t
(Overhang)
Ground
Level
Figure 41 - Concrete Slab Installation
Figure 40 - Basement Installation
(Optional Outside Air Runs)
Duct Extended
to Miss Joist
Firestop Spacer
Inside Wall
To Outside Wall
Figure 42 - Installation Above Basement or
Crawl Space
40 71D0532
Wall
Figure 43 - 45° Corner Installation on
Slab Floor
Outside
FOR USE OF OPTIONAL AK-4 OUTSIDE AIR KIT
The use of outside air for combustion is optional unless required by building codes. It is only necessary to supply outside
combustion air to one side of the fi replace. Use the model AK4 combustion air kit.
MODEL AK-4 COMBUSTION AIR ASSEMBL Y
1. Remove the cover plate from the 4" outlet opening location on the left or
right outside of the fi replace.
2. Place the insulation ring between the AK-4 starting collar and fireplace wall.
3. Place the starting collar (4") into the hole on the side of fi replace. Fasten it in place with the four sheet metal screws
provided. See Figures 44 and 45.
Note: The air starting collar extends through the fi replace outer wrap. When the air starting collar is securely
attached, it will form a seal against the fi replace wall.
4. Attach outside duct to starting collar with duct clamp or screws. See Figure 45.
DO NOT remove the
cover if the outside air
will not be connected.
WARNING
Left Side of
Fireplace
Shorter End
of Air Starting
Figure 44 - Attaching Outside Air Starting Collar
and Insulation Ring to Left Side of Fireplace
5. Cut a 6-inch diameter opening for model AK-4 in the outside
wall covering where the outside vent is to be located. See
Figure 46
6. Select and cut a piece of duct long enough to attach to the
fi replace and stick out at least 3" beyond the face of the wall
to which the AK-4 inlet air vent will be attached. See Figur e
45.
Insulation Ring
AK-4 Starting
Collar
Sheet
Meal
Screws
Collar
6" Diameter
Hole
Duct
Extending
3"min.
Screws
Left Side of
Fireplace
Figure 45 - Attaching Outside Duct
to Starting Collar
Air Starting
Collar
Screw
Duct
Nail
Holes
Use FP-4 U duct for maximum effi ciency
and safety. Do not use a combustible
duct. Always use UL Listed Class 0 or
1 duct material.
WARNING
71D0532 41
Figure 46 - Combustion Air Assembly for
AK-4 Inlet
Air Vent
Model No. AK-4
Screws
Continued
FOR USE OF OPTIONAL AK-4 OUTSIDE AIR KIT
MODEL AK-4 COMBUSTION AIR ASSEMBL Y (CONTINUED)
7. If the duct is the insulated type, push the insulation back from one end of
the duct approximately 2". See Figure 49.
8. Slip the exposed end of the duct over the starting collar on the fi replace.
9. Using the sheet metal screws provided, secure the duct end to the collar
attached to the fi replace.
Duct
Connector
Approximately
2"
10. Nail or screw the combustion air assembly to the surface of the wall.
Note: If the wall covering is brick or stone, use appropriate masonry
fasteners. If necessary, splice the duct. Use a model 403-duct
connector to splice duct sections.
INSTALLING MODEL 403 DUCT CONNECTOR
1. Push insulation back approximately 2" from the end of each duct.
2. Slip each duct over duct connector until an equal length of connector extends into each duct.
3. Place duck clamp over the end of each duct. Tighten duct clamp down snuggly.
4. Push insulation back into place and over duct clamp.
Figure 49 - Installing Duct
Connector 403
Insulation
Duct Clamp
42 71D0532
NOTES
71D0532 43
MONESSEN HEARTH SYSTEMS
LIMITED LIFETIME WARRANTY POLICY
The following components are warranted for life to the original owner, subject of proof of purchase: Firebox,
Combustion Chamber, Heat Exchanger, Grate, and Stainless Steel Burners.
FIVE YEAR WARRANTY
The following components are warranted for 5 years to the original owner, subject of proof of purchase: Vent
Free Ceramic Fiber Logs, Catalytic Filter and Aluminized Burners.
BASIC WARRANTY
Monessen Hearth Systems (MHS) warrants the components and materials in your gas appliance to be free from
manufacturing and material defects for a period of two years from date of installation. After installation, if any of
the components manufactured by MHS in the appliance are found to be defective in materials or workmanship,
MHS will, at its option, replace or repair the defective components at no charge to the original owner. MHS
will also pay for reasonable labor costs incurred in replacing or repairing such components for a period of
two years from the date of installation. Any products presented for warranty repair must be accompanied
by a dated proof of purchase.
This Limited Lifetime Warranty will be void if the appliance is not installed by a qualified installer in accordance
with the installation instructions. The Limited Lifetime Warranty will also be void if the appliance is not operated
and maintained according to the operating instructions supplied with the appliance, and does not extend to (1)
firebox/burner assembly damage by accident, neglect, misuse, abuse, alteration, negligence of others, including
the installation thereof by unqualified installers, (2) the costs of removal, reinstallation or transportation of
defective parts on the appliance, or (3) incidental or consequential damage. All service work must be performed
by an authorized service representative.
This warranty is expressly in lieu of other warranties, express or implied, including the warranty of merchantability
of fitness for purpose and of all other obligations or liabilities. Monessen Hearth Systems, Inc. does not
assume for it any other obligations or liability in connection with the sale or use of the appliance. In states
that do not allow limitations on how long an implied warranty lasts, or do not allow exclusion of indirect
damage, those limitations of exclusions may not apply to you. You may also have additional rights not covered
in this Limited Lifetime Warranty.
MHS reserves the right to investigate any and all claims against the Limited Lifetime Warranty and decide
upon method of settlement.
For information about this warranty, contact:
Technical Services
Monessen Hearth Systems
149 Cleveland Drive
Paris, Kentucky 40361
44 71D0532
MARCH 2007 P/N 71D0532 • Rev. 7
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