Rasmussen DF-AFB20-ME-N-B User manual

1
DOUBLE FACE ALTERNA™
Contemporary Gas Heater
This appliance may be installed in an aftermarket,
permanently located, manufactured (mobile) home,
where not prohibited by local codes.
This appliance is only for use with type of gas
indicated on the rating plate. This appliance is not
convertible for use with other gases. Field conversion
is not permitted. Gas type conversion may only be
accomplished at the factory. Please contact Rasmussen
for details.
ATTENTION! READ INSTRUCTIONS CAREFULLY BEFORE ASSEMBLY OR USE
WARNING
This appliance is for installation only in a solid-fuel burning masonry or UL 127 factory-built fireplace or in a listed
ventless firebox enclosure. It has been design certified for these installations. Exception: DO NOT install this
appliance in a factory-built fireplace that includes instructions stating it has not been tested or should not be used
with unvented gas logs.
286-L-05-5
Last Printed 2/3/2009 8:17 AM
Owner’s Manual
DF-ALTERNA VF Contemporary Gas Heaters are certified to the following standards:
• UNVENTED ROOM HEATER ANSI - Z21.11.2-2007
• VENTED DECORATIVE APPLIANCE - ANSI Z21.60b-2004 and CSA 2.26
General Assembly, Installation, and Operation Instructions
®
This is an unvented gas-fired heater. It uses air
(oxygen) from the room in which it is installed.
Provisions for adequate combustion and ventilating
air must be provided. Refer to page 4.
12028 E. PHILADELPHIA ST.
WHITTIER, CA 90601 U.S.A.
www.rasmussen.biz
THE GAS LOG COMPANY
— Do not store or use gasoline or other flammable
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 fire
department.
— Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result caus-
ing property damage, personal injury or loss of life.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
Models: DF-AFB (20, 24, 30) - (ME, SE, RE) - (N, P) - (B,SS) DF-AFS (20, 24, 30) - (ME, SE, RE) - (N, P) - (B,SS)
DF-AFG (20, 24, 30) - (ME, SE, RE) - (N, P) - (B,SS) DF-AFM (20, 24, 30) - (ME, SE, RE) - (N, P) - (B,SS)
Installation must conform with local codes or, in the
absence of local codes, with the National Fuel Gas Code,
ANSI Z223.1/NFPA 54.
The Minimum Fireplace Size (in inches) in which this ALTERNA set is to be installed must be as follows:
IMPORTANT:
An unvented room heater having an input rating of more than 10,000 Btu per hour shall not be installed
in a bedroom or bathroom. Do not install this appliance in a bedroom or bathroom.
C US
Set Size Model Number BTU/hour Width Depth Height
20 DF-AF(B,G,S,L) 20 - (ME,SE,RE) - (N,P) - (B,SS) 30,000 26 14 16
24 DF-AF(B,G,S,L) 24 - (ME,SE,RE) - (N,P) - (B,SS) 40,000 30 14 16
30 DF-AF(B,G,S,L) 30 - (ME,SE,RE) - (N,P) - (B,SS) 40,000 36 14 16
REV. DF-ALT 0209

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CARBON MONOXIDE POISONING MAY LEAD TO DEATH
When used without fresh air, decorative gas appliances may give off carbon monoxide, an odorless, colorless,
poisonous gas. Some people, pregnant women, persons with heart or lung disease, anemia, persons under the
influence of alcohol and persons who live at high altitudes are more affected by carbon monoxide than others.
Early signs of carbon monoxide poisoning resemble the flu and include; headache, dizziness and/or nausea. If you
have these symptoms, the burner or the appliance may not be installed or working properly, or the flue may be
blocked. GET FRESH AIR AT ONCE! Verify that the gas log set is properly arranged and have the heater and
chimney flue serviced before using again.
WARNING
During manufacturing, assembly and packaging, various components of ALTERNA™ are exposed to certain oils or
films. These 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, eye or lung irritation. This is a normal occurrance and only
temporary. The initial break-in operation should last 2-3 hours with the burner at the highest setting. Provide maximum
ventilation by opening windows, doors and the chimney flue (if using a vented model) to allow odors to dissipate.
The only odor remaining after this initial break-in period will be the normal odors associated with the combustion of
Natural or Propane Gas and/or related to your indoor environment (see page 23).
WARNING—Proposition 65 Statement
If not installed, operated and maintained in accordance with these instructions, this product could expose you to
substances in fuel or from fuel combustion which are known to the State of California to cause cancer,
birth defects or other reproductive harm.
IMPORTANT INFORMATION
• Due to high temperatures, the appliance should be located out of traffic and away from furniture and draperies.
• Children and adults should be alerted to the hazard of high surface temperatures and should stay away to avoid burns or
clothing ignition.
• Young children should be carefully supervised when they are in the same room with the appliance.
• Do not place clothing or other flammable material on or near the appliance.
• Any safety screen or guard removed for servicing an appliance must be replaced prior to operating the heater.
• Installation and repair should be done by a qualified service person. The appliance should be inspected before use and at
least annually by a professional service person. More frequent cleaning may be required due to excessive lint from
carpeting, bedding material etc. It is imperative that control compartments, burners and circulating air passageways of the
appliance be kept clean.
• WARNING: Any change to this heater or its controls can be dangerous.
• This appliance is intended for supplemental heating. It should not be used as a primary heat source for a dwelling.
• WARNING: Failure to keep the primary air opening(s) of the burner clean may result in sooting and property damage.
• Keep appliance area clear and free from combustible materials, gasoline and other flammable vapors and liquids.
• 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 that has been under water.
• WARNING: Before installing in a solid-fuel burning fireplace, the chimney flue and firebox must be cleaned of soot,
creosote, ashes and loose paint by a qualified chimney cleaner.
• WARNING: Do not allow fans to blow directly into the fireplace. Avoid any drafts that alter burner flame patterns.
• WARNING: Do not use a blower insert, heat exchanger insert or any other accessory not approved for use with this heater.
• A fireplace screen must be in place when the appliance is operating and, unless other provisions for combustion air are
provided, the screen shall have an opening(s) for introduction of combustion air.
• Solid fuels shall not be burned in a fireplace where this ALTERNA VF heater is installed.
• WARNING: Glass doors must be fully opened when appliance is in operation to allow for safe combustion, cooling of
components and venting.
• Any outside air ducts and/or ash dumps in the fireplace shall be permanently closed at the time of appliance installation.
• State or local codes may only allow operation of this appliance in a vented configuration. Check your state or local codes.
• DO NOT use this appliance, in the vent-free application, in sleeping quarters, bathrooms or recreational vehicles. This
appliance may be used in sleeping quarters and bathrooms if used in a vented application, subject to local codes.
• Avoid contact with the objects, chassis or another part which may be hot during operation.
• This appliance is equipped with an ODS (Oxygen Depletion Sensor) pilot light safety system , which is designed to
shut the appliance off in the absence of inadequate fresh air. Additional ventilation may be obtained by opening a
window an inch or two, or a door to another room. See Page 23 for nuisance shutdown issues and correction.

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25
PARTS LIST
REQUIRED TOOLS AND MATERIALS
Adjustable Wrench and Pipe Wrench. Pipe joint compound or Teflon tape is required for all threads (except flared threads).
WARNING: Any change to this appliance or its controls can be dangerous
●
●
1
15
17 19
20
21
18
22
14
3
●
●
●
6
●
●
●
5
3A
12
10
9
11
13A
9. ODS mount plate (Pilot Location)
10. Burner (20”- CH5-RB, 24”-022AR, 30”-023
11. 3/8” Gas Output Tubing
12. Pilot Assembly ; Natural Gas (ODS-CN-N)
10. (Blue dot), Propane Gas (ODS -CN-N)
11. (red dot)
12. 13. Orifice Holder (A2T)
11. 13A Orifice Spud - (#36 for 20”, #30 for 24”
and 30”)
12. 13B Orifice Chart
13. 14. Piezo Push Button Igniter
18. 15 Piezo Wire
16. Base supports
17. Flex Connector (SSCB-18)
18. 3/8” x 1/2” FIP EL (A1)
19. Damper Stop Clamp (DC1)
20. Glass Medium (GL)
21. Rating Plate
22. Warning Plate
23. Wireless Remote Transmitter Devices
For “-SE” Models (each sold separately)
A. Wireless Hand-Held ON/OFF Remote
(SR-2R)
B. Wireless Hand Held ON/OFF Remote with
Thermostat (THR-2R)
C. Wireless Wall Timer (30/60/120 Minutes)
(WT-2R)
D. Wireless Wall Switch (WS-2R)
E. Wireless Wall Thermostat (TS-2R)
24. Wireless Hand Held Variable Remote for “-RE”
Models (STR-RMD)
25 Remote Receiver for “-SE” or “-RE” (BPR3)
BURNER STYLE N P
DF-AFB, G, S, L20- ME/SE/RE 36 52
DF-AFB, G, S, L24- ME/SE/RE 30 49
DF-AFB, G, S, L30- ME/SE/RE 30 49
DRILL SIZE
3B
4
8
1. Valve Knob Extender “ME” Models
(STV-KE2)
2. “EASY” Safety Valve Knob
3. Valve Plug (“ME” Models) (also used
when replacing, servicing or
upgrading.)
Location for;
3A Remote Ready Solenoid
(-SE Models) (STV-LS)
3B Variable Flame Height Motor drive
(-RE Models) (STV-VMD)
4. “EASY” Safety Valve (STV-10)
5. Gas Supply Input— 3/8” flare
6. Regulator (Natural Gas - R1-3.5
Propane - R1-10.5)
7. Thermocouple Wire
8. 1/4” Pilot Tubing (length varies with set
size)
2
7
●
13
13B
16
24
23
A. B. C. D. E.

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This heater shall not be installed in a “confined” space or unusually tight construction unless provisions are
provided for adequate combustion and ventilation air.
Calculations to Determine Confined or Unconfined Space:
1. Determine number or rooms (including adjoining rooms with odorless passageways or ventilation grates.)
Example: Living room/Dining Room + Kitchen
2. Determine the Total Volume of the Space (Width x Length x Height).
Example: Living room/Dining Room 14’ x 20’ x 8’ = 2240 cu ft.
Kitchen 8’ x 12’ x 8’ = 768 cu ft.
Total Volume of Space 3008 cu ft.
3. Divide the total volume of space by 50 cu ft to determine the Maximum Supportable Btu/Hr.
Example: 3008 cu ft ÷ 50 = 60.160 x 1000 = 60,160
Maximum Supportable Btu/Hr. = 60,160 Btu/Hr.
4. Add the rated (Btu/hr) of all fuel burning appliances in the “space” to determine Actual Btu/Hr. used.
Example: Vent free gas log heater 40,000 Btu/Hr.
+ Gas water heater 32,000 Btu/Hr.
= Actual Btu/Hr. Used 72,000 Btu/Hr.
Note: Do not include direct vent gas appliances.
5. Compare Maximum Supportable Btu/Hr to Actual Btu/Hr Used.
• If the Actual Btu/Hr used. is greater than the Maximum Supportable Btu/Hr. then the space is CONFINED.
• If the Actual Btu/Hr used. Is less than the Maximum Supportable Btu/Hr. then the space is UNCONFINED.
Example: Maximum Supportable Btu/Hr = 60,160 Btu/Hr.
Actual Btu/Hr. Used = 72,000 Btu/Hr.
Difference = 11,840 Btu/Hr. = Excess Non-Supportable Btu/Hr.
Because the Actual Btu/Hr used Exceeds the Maximum Supportable Btu/Hr in this example, the space is considered
a Confined Space requiring you to either increase the Maximum Supportable Btu/Hr by the difference, in this case
11,840 Btu/Hr. or decrease the Actual Btu/Hr used by the same amount. You may also choose to operate your
ALTERNA™ as a Vented Appliance instead. (See notes and warnings regarding vented installation on Page 7)
Adequate Combustion And Ventilation Air Options:
• Increasing the Maximum Supportable Btu/Hr.
1. Add to the number of rooms which comprise the “Space”. To do this you must either completely remove the door
to an adjoining room, or provide two permanent ventilation grills; one within 12” of the ceiling and another within
12” of the floor.
2. Provide extra fresh air using ventilation grills and ducts to the outdoors. You must provide two permanent open-
ings. One within 12” of the ceiling and another within 12” of the floor. Connect these directly to the outdoors or
spaces open to the outdoors, e.g., attics or crawl spaces. If this route is chosen you MUST follow the National
Fuel Gas Code NFPA 54/ANSI Z223.1, Section 5.3, Air for Combustion and Ventilation for required size of
ventilation grills or ducts.
• Lower the Actual Btu/Hr used by relocating other gas burning appliances outside the “space” or installing a lower
Btu/Hr heater. In the example, the maximum Btu/Hr. of the heater could be no more than 28,160 Btu/Hr.
The “National Fuel Gas Code, ANSI Z223.1/NFPA 54” defines a confined space as a space whose volume is less than
50 cubic feet per 1000 Btu per hour (4.8 m³per kW) of the aggregate input rating of all appliances installed in that space
and an unconfined space as a space whose volume is not less than 50 cubic feet per 100 Btu per hour (4.8 m³per kw) of
the aggregated 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.
VENT FREE APPLICATIONS ●SPACING CALCULATIONS

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For our example, we have chosen to add to our Total Volume of the Space by removing the door to an adjoining study
and increasing our Maximum Supportable Btu/Hr by the volume of the additional room. The new “space” calculations,
including the additional adjoining room are:
Living room/Dining room & Kitchen 3008 cu ft
Study(9'x10'x8') 720cuft
Total volume of space 3728 cu ft
The new Maximum Supportable Btu/Hr = (3728 cu ft ÷ 50 cu ft ) x 1000 = 74,560 Btu/Hr
74,560 Btu/Hr = Maximum Supportable Btu/Hr
-72,000 Btu/Hr = Actual Btu/Hr Used
2560 BTU/Hr = Remaining supportable BTU/H
Because the Actual Btu/Hr used is now less than the Maximum Supportable Btu/Hr, the space is considered an
Unconfined Space. No additional fresh combustion and ventilation air would be required.
**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 10-11 kg per pa-sec-m²) or less with openings gasketed or sealed;
b) Weather stripping 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.
VENT FREE APPLICATIONS ●COMBUSTION AIR CALCULATIONS
COMBUSTION AIR CALCULATIONS WORKSHEET
1. Room Width Length Height W x L x H =Vol.(ft³)
1a. 1a.
1b. 1b.
1c. 1c.
1d. 1d.
2. Total Volume (ft³) The Sum of Volume of all rooms (add lines 1a. thru 1d.). 2.
3. Max Supportable Btu/Hr = Total Volume (ft³) ÷ 50 x 1000 (divide line 2. by 50 then multiply
by1000)
3.
4. 4a. Btu/hr 4b. Btu/hr4c. Btu/hr4d. Btu/hr
Actual Btu/hr used = The sum of Btu/hr of all fuel burning appliances inside the space identified
as rooms 1a. thru 1b (add line 4a thru 4d).
4.
5. (Maximum Supportable Btu/Hr) minus (Actual BTU/hr Used) (Subtract line 4. from line 3. ) 5. *
* If Line 5is greater than zero, the Actual Btu/Hr Used is less than the Maximum Supportable Btu/Hr and the
space is considered UNCONFINED.No additional fresh combustion and ventilation is required.
* If Line 5is zero or less, the Actual Btu/Hr Used is greater than Maximum Supportable Btu/Hr and the space is
CONFINED. You must either increase the Maximum Supportable Btu/Hr, decrease the Actual Btu/Hr Used or
operate as a Vented Appliance (See notes and warnings regarding vented installation on Page 7).
WARNING:
If the area in which the heater may be operated is smaller than that defined as an unconfined 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 / NFPA 54, or applicable local codes.

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*Standard Fireplace Hood
with a minimum 4 inch
horizontal projection
Horizontal projection from face of fireplace
Non combustible or heat resistant material (gypsum
board, marble, sheet rock, slate, tile etc.)
8” Minimum from top of firebox opening
10”
8”
6”
2.5”
.75”
30”+
28”-30”
12”-20”
10”
8”
6”
2.5”
1.5”
10-12”
When operated as a Vent Free Heater, the minimum clearances from the fireplace opening to combustible materials
must be maintained as outlined below .
VENT FREE APPLICATIONS ●MINIMUM CLEARANCES TO COMBUSTIBLES
MANTEL CLEARANCE WITHOUT HOOD MANTEL CLEARANCE WITH HOOD
IF YOU CANNOT MEET THESE MINIMUM CLEARANCES YOU MUST OPERATE THE APPLIANCE AS A VENTED
APPLIANCE WITH CHIMNEY FLUE DAMPER OPEN. (See notes regarding vented installation on following page)
0-12" 0"
12"-20" 3/4"
20"-25" 2 1/2"
25"-28" 6"
28"-30" 8"
30" plus 10"
Height Above
Opening
Projection Out
From Face
42”
15 1/2”
MINIMUM CLEARANCES TO SIDE WALL AND CEILING
Side wall: 15 1/2" from side of fireplace opening.
Ceiling: 42" from top of fireplace opening.
NOTE:
Clearances to Combustible Construction are those
distances required to ensure that a fireplace mantel or
facing will not catch fire. In most cases they should also
be adequate to prevent any discoloration or warping due
to heat. However, each and every decorative gas appli-
ance installation (ALTERNA™ included) presents a dif-
ferent and completely unique set of circumstances involv-
ing many variables beyond the control of the manufac-
turer. These include paint or finish composition, previous
exposure to heat, methods and quality of construction, air
flow patterns, glass doors, fans or blowers, etc. Because
of these variables, we cannot guarantee that heat warping
or discoloration will never occur. The potential for heat
warping or discoloration may exist whether you are burn-
ing an ALTERNA™, some other manufacturer's decora-
tive gas appliance or even wood.
Distances from Top of
Firebox Opening to Underside
of Mantel
Horizontal projection from face of fireplace
A fireplace hood deflects heat away from the fireplace face and mantel, reducing the potential for heat related warping or discoloration.
The use of a fireplace hood is highly recommended.*
0-10" 0"
10"-12" 1 1/2"
12"-15" 2 1/2"
15"-17" 6"
17"-20" 8"
20" plus 10"
Height Above
Opening
Horizontal
Projection From
Face of
Fireplace
Distances from Top of
Firebox Opening to Underside
of Mantel
17”-20”
20”+
15”-17”
12”-15”
20”-25”
25”-28”

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VENTED INSTALLATIONS
THE CHIMNEY DAMPER MUST BE WIDE OPEN AND FIXED IN A MANNER TO MAINTAIN A PERMANENT FREE OPEN-
ING AT ALL TIMES AS OUTLINED ABOVE. THE AREA OF THE FLUE MUST BE NOT LESS THAN 1/10 THE AREA OF THE
FIREPLACE OPENING. THIS DECORATIVE GAS APPLIANCE MUST BE INSTALLED IN A FULLY VENTED METAL OR
MASONRY FIREPLACE WITH A WORKING FLUE THAT IS SAFE FOR BURNING A WOOD FIRE. THE FLUE MUST BE
FREE OF ANY OBSTRUCTIONS AND MUST EXHAUST ALL PRODUCTS OF COMBUSTION. DAMPER AND GLASS
DOORS MUST BE FULLY OPEN BEFORE LIGHTING OR BURNING FOR PROPER VENTILATION AND TO PREVENT
HEAT DAMAGE TO THE VALVE.
FIGURE 2
A) Damper
Clamp
B) Damper Blade
Flue
Gas Supply
Pipe
FIGURE 1
Log Lighter
Valve Assembly (V1)
GENERAL INSTALLATION INSTRUCTIONS
The installation and the provisions for combustion and ventilation air must conform with The National Fuel Gas
Code ANSI Z223.1 / NFPA54, or The CSA B149.1, Natural Gas and Propane Installation Code, latest edition.
STEP ONE: PREPARATION (ALL MODELS)
1. Verify that the Valve Assembly is correctly matched to the set, burner,
and gas supply.
2. Insure that Fireplace Gas Supply is off (Figure 1A) .
3. Thoroughly clean fireplace floor of any ashes and have a qualified
chimney cleaner insure that the chimney flue and firebox are free of
soot, creosote, ashes and loose paint.
4. (VENTED INSTALLATIONS ONLY) Attach Damper Clamp (Figure 2A)
over edge of fireplace Damper Blade (Figure 2B) to prevent damper
from closing accidentally. If unable to attach damper clamp, drill a hole
(or holes) in the damper or remove it completely.
WARNING! CHECK FOR PROPER VENTING
A properly sized, unobstructed chimney will normally vent all products of combustion. Any odor or smoke detected inside
the room is an indication that the flue is not functioning properly.
SHUT OFF THE BURNER IMMEDIATELY! THE CAUSE OF THE VENTING PROBLEM MUST BE DISCOVERED AND
CORRECTED BEFORE CONTINUED USE.
Continued use with improper venting may cause damage to your fireplace, room furnishings and could cause serious illness.
IF IMPROPER VENTING IS SUSPECTED, IMMEDIATELY HAVE THE APPLIANCE AND CHIMNEY FLUE SERVICED.
WARNING!
WARNING!
Opening Height (16” Minimum)
A) Fireplace Gas
Supply Valve
The minimum permanent free opening of the fireplace chimney or chimney damper must be 29 sq. inches based upon a
minimum chimney height of at least 10 feet. Solid Fuels shall not be burned in a masonry or UL 127 factory built fire
place where an ALTERNA™ is installed.
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically
approved with this heater may result in property damage or personal injury.
LEAK TEST PROCEDURES
WARNING: DO NOT use an open flame to test leaks!
Create a mixture of equal parts soap and water. Apply to all the joints of the pipe fittings from the gas supply to
the burner. Turn on the gas supply valve for no longer than 3-5 seconds. If bubbles appear in the soap solution
applied to the joints, there is a leak. Turn off the gas supply valve and tighten those fittings. Repeat the procedure
until no more bubbles appear. Test all joints. NOTE: Always perform a leak test any time the appliance has been
moved or disconnected from the gas supply line.
Firebox Floor Side View of Two sided Firebox

8
INSTALLATION AND GAS SUPPLY CONNECTION (ALL MODELS)
WARNING:
Be certain that combustible flooring material (i.e.; carpet, tile etc.) is not too close to this gas appliance. If this
appliance is at floor level or less than 6” above the floor, there must be at least 12” of noncombustible material
between the base of the fireplace and any combustible flooring.
MINIMUM AND MAXIMUM INLET GAS SUPPLY PRESSURE
The minimum inlet gas supply pressure shall be 5 inches of water column on Natural Gas and 11 inches of water
column on Propane. The maximum inlet gas supply pressure shall be 7 inches of water column on Natural Gas and
14 inches of water column on Propane. The appliance and its 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 psi (3.5 kPa) and
isolated from the gas supply piping system during any pressure testing at equal to or less than 1/2 psi (3.5 kPa).
STEP TWO: BURNER INSTALLATION AND GAS SUPPLY CONNECTION
1.Insure that the Gas Supply to the Fireplace is turned off and verify correct gas type and proper gas pressures.
2.Seal threads of gas supply with pipe compound, then thread 1/2” FIP x 3/8” Flared Elbow (Figures 3 and 4A) onto the
Gas Supply Pipe (Figures 3 and 4B) and wrench tighten.
3. Place The ALTERNA™ inside firebox or approved enclosure centered from left to right and as far to the rear of the fire-
box as possible. Thread one end of the supplied Flex Connector (Figures 3 and 4C below) to the Gas Input (Figure
4D), then connect the other end to the 1/2” FIP x 3/8” Flared Elbow (Figures 3 and 4A) attached to the Gas Supply
Pipe. If Flex Connector is bent into too small a radius it may kink or break causing air flow noise and/or gas leaks.
The minimum dimensions of the fireplace in which this ALTERNA™ is to be installed, allowing adequate clearances for acces-
sibility for purposes of servicing and proper installation are as follows; Minimum opening height 16 inches, Firebox depth, 14”
inches (Figure 3 above). Width shall be a minimum of 6” greater than front width of ALTERNA.
Depth
Minimum
18”
B) Gas Supply
A) 1/2” FIP x 3/8”
Flared Elbow
Front Width
Minimum 6” greater than front width of Alterna
FIGURE 3
Top View
(AFB24 used for
example)
A) 1/2” FIP x 3/8”
Flared Elbow
FIGURE 4
Right Side View
Gas Input
B) Gas Supply
C) Flex Connector Connected from 1/2” FIP x 3/8” Elbow to Gas Input
C) Flex Connector

9
FIREBALL PLACEMENT (APPLIES TO DF-AFB20, 24 AND 30)
B)
STEP ONE: Begin by placing the first row of 4 Full FireBalls (FB4) one by one into each locator hole on burner with flat,
rough side facing down (Figure 1A and B). (About one half inch of the tapered end will fit into the locator hole.)
STEP TWO: Next place the second row of 3 Full FireBalls on top of the first row with flat side resting against Flame Rod.
(Figures 2A and B)
FIGURE 6
FIGURE 5
A)
B) Second row with flat side
resting against Flame Rod.
STEP THREE: Repeat process for opposite side. Completed Alterna Fireball set shown below. (AFB20-ME-N-B used for
example.
A)
Flame Rod.
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically
approved with this heater may result in property damage or personal injury.
FIGURE 7

10
FIRESHAPES PLACEMENT FOR DF-AFG30
PY4-44
FB-4 CU-44
CO-63
CY-63
CO-55
CO-63
CY-63
CO-55
PY4-44
CU-44
FB-4
CU-44
CO-63 FB-4
PY4-44
CO-55
CY-63
PY4-44 FB-4 CO-63
CU-44 CY-63 CO-55
CO-55 PY4-44
CY-63
Place FireShapes into their respective locator holes on the ALTERNA in the order shown below beginning from left to
right. The four sided Pyramid (PY4-44) will fit into the first hole on the left side at a slight angle leaning forward and to
the right (Figure 10). The Fireball (FB-4) will fit into the next hole with the tapered end facing down (Figure 8). Next,
place the Cube (CU-44) into the third locator hole with the rear right corner resting on the edge of the burner allowing
it to lean slightly forward into the locator hole (Figure 9). Now, place the flat topped Cone (CO-63) into the next hole
resting on it’s side (Figures 8 and 9). The Cylinder (CY-63 ) will fit into the 2nd hole from the right at a slight angle
resting against the Flame Rod (Figures 8, 9 and 10). Last, place the second Cone (CO-55) into the first locator hole on
the right leaning slightly forward into locator hole (Figure 10). Duplicate placement for opposite side.
FIGURE 8
(Face)
FIGURE 9
(Top View)
FIGURE 10
(Left Side)
Flame Rods

11
CY-63
PY4-44
PY4-44
FB-4 CO-63
CU-44
CY-63
CY-63
CU-44
FB-4
CO-63 PY4-44
PY4-44
FB-4 CO-63
CU-44
CY-63
FIRESHAPES PLACEMENT FOR DF-AFG24
Place FireShapes into their respective locator holes on the ALTERNA in the order shown below beginning from left to
right. The four sided Pyramid (PY4-44) will fit into the first hole on the left side at a slight angle leaning forward and to the
right (Figures 11 and 12). The Fireball (FB-4) will fit into the next hole with the tapered end facing down (Figure 11). Next,
place the Cube (CU-44) into the third locator hole with the rear right corner resting on the edge of the burner allowing it to
lean slightly forward into the locator hole (Figure 12). Now, place the flat topped Cone (CO-63) into the next hole resting
on it’s side. The Cylinder (CY-63 ) will fit into the 2nd hole from the right at a slight angle resting against the Flame Rod
(Figures 11 and 12). Duplicate placement for opposite side.
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically
approved with this heater may result in property damage or personal injury.
FIGURE 11
(Face)
FIGURE 12
(Top View)
FIGURE 13
(Right Side)
Flame Rods

12
FIRESHAPES PLACEMENT FOR DF-AFG20
Place FireShapes into their respective locator holes on the ALTERNA in the order shown below beginning from left to
right. The four sided Pyramid (PY4-44) will fit into the first hole on the left side at a slight angle leaning forward and to the
right (Figures 14 and 16). Next, place the Cube (CU-44) into the third locator hole with the rear right corner resting on the
edge of the burner allowing it to lean slightly forward into the locator hole (Figure 15). The Fireball (FB-4) will fit into the
next hole with the tapered end facing down (Figure 14). Last, place the Cylinder (CY-63 ) into the 1st hole on the right at
a slight angle resting against the Flame Rod (Figures 15 and 16). Duplicate placement for opposite side.
PY4-44 FB-4
CU-44 CY-63
PY4-44
FB-4 CU-44
CY-63
PY4-44
FB-4
CU-44
CY-63
PY4-44
CY-63
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically
approved with this heater may result in property damage or personal injury.
FIGURE 14
(Face)
FIGURE 15
(Top View)
FIGURE 16
(Right Side)
Flame Rods

13
ST3
ST17 ST19
ST2 ST1
ST3 ST17
ST19 ST2
ST1
ST3
ST17 ST19
ST2
(Front View) (Front View) (Front View)
(Top View)
ST1
(Top View)
FIRESTONES PLACEMENT FOR DF-AFS30
When placing FireStones over each locator hole, consider the shape of each FireStone and its corresponding locator
hole. Place each FireStone on the 2nd row on top of those on the first row with back side of each resting against Flame
Rods (see Figure 20, following page)
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically
approved with this heater may result in property damage or personal injury.
Bottom Row
ST3
ST17 ST19
ST2 ST1
ST3 ST17
ST19 ST2
ST1
FIGURE 17
(Top View)
FIGURE 18
(Top View)

14
ST1 ST3
ST17 ST19
ST2
ST16 ST10
ST20
ST18 ST15
ST15
(Top View)
ST16
(Front View) ST10 (Top View)
ST20
(Front View)
ST18
(Top View)
FIRESTONES PLACEMENT FOR DF-AFS30 (cont’d)
Top Row
The AFS30 should look like the illustration below when completed.
ST1
ST3
ST17
ST2
ST20 ST10
ST15
ST18
●●
ST16
(ST19 under ST20)
ST1
ST3 ST17
ST2
ST20
ST10 ST15 ST18
●
ST16
(ST19 under ST20)
●
ST2
ST16
ST10
ST3
FIGURE 19
(Face)
FIGURE 20
(Top View)
FIGURE 21
(Right Side)

15
FIRESTONES PLACEMENT FOR DF-AFS24
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically
approved with this heater may result in property damage or personal injury.
ST3
ST17
ST2
(Front View) (Front View) (Front View)
ST1
(Top View)
Bottom Row
ST3
ST17
ST2 ST1
ST2
ST3 ST1 ST17
ST3
ST17
ST2 ST1
ST2
ST3 ST1 ST17
FIGURE 22
(Top View)
FIGURE 23
(Top View)
When placing FireStones over each locator hole, consider the shape of each FireStone and its corresponding locator
hole. Place each FireStone on the 2nd row on top of those on the first row with back side of each resting against Flame
Rods (see Figure 25, following page)

16
The AFS24 should look like the illustrations below when completed.
ST15
(Top View)
ST16
(Front View) ST10 (Top View)
ST18
(Top View)
Top Row
ST3
ST10
ST17 ST1
ST2
ST15
ST18
ST16 ST10
ST3
ST2
ST16
ST1
ST2
ST15
ST18
ST16
ST17
ST10
ST3
●
●
ST3 ST10 ST18ST15 ST16
ST2
ST1
ST17
●
FIRESTONES PLACEMENT FOR DF-AFS24 (cont’d)
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically
approved with this heater may result in property damage or personal injury.
FIGURE 24
(Face)
FIGURE 25
(Top View)
FIGURE 26
(Left Side)

17
FIRESTONES PLACEMENT FOR DF-AFS20
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically
approved with this heater may result in property damage or personal injury.
ST17
ST2
(Front View) (Front View)
ST1
(Top View)
Bottom Row
ST17
ST2 ST1
ST2
ST17
ST1
ST17
ST2 ST1
ST2
ST17
ST1
FIGURE 27
(Top View)
FIGURE 28
(Top View)
When placing FireStones over each locator hole, consider the shape of each FireStone and its corresponding locator
hole. Place each FireStone on the 2nd row on top of those on the first row with back side of each resting against Flame
Rods (see Figure 30, following page)

18
FIRESTONES PLACEMENT FOR DF-AFS20 (cont’d)
ST17 ST1
ST2
ST15
ST18
ST16
ST2
ST16
ST17 ST1
ST2
ST15
ST18
ST16
ST2
ST15 ST18
ST17
ST1
ST16
ST1
ST15
The AFS20 should look like the illustrations below when completed.
ST15
(Top View)
ST16
(Front View)
ST18
(Top View)
Top Row
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically
approved with this heater may result in property damage or personal injury.
FIGURE 29
(Face)
FIGURE 30
(Top View)
FIGURE 31
(Right Side)

19
FIREGLASS PLACEMENT FOR DF-AFM20, 24 and 30
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically
approved with this heater may result in property damage or personal injury.
FIREGLASS DISTRIBUTION; DF-GM20
10 lbs. 12 lbs. 15 lbs.
DF-GM24 DF-GM30
FireGlass Placement:
Begin by slowly pouring glass onto the surface of the Alterna, being careful not to let any glass drop into the pilot/
thermocouple or burner areas (Figures 31 and 33). Glass in either of these areas may cause flame impingement or
block gas flow which can have hazardous results. Glass should only reach as far as edge of burner guard (Figs. 32
and 34).
FIGURE 31
Side View
FIGURE 32
Side View
FIGURE 33
(Top View)
FIGURE 34
(Top View)
Burner Guards
Pilot / Thermocouple Area
Pilot/Thermocouple
Area
Burner Guards
Burner
Burner
(Surface)

20
VENTED MODELS IMPORTANT!
CHIMNEY DAMPER MUST BE WIDE OPEN! THE FLUE MUST VENT ALL PRODUCTS OF COMBUSTION.
DAMPER AND GLASS DOORS MUST BE FULLY OPEN BEFORE LIGHTING OR BURNING FOR PROPER
VENTILATION AND TO PREVENT HEAT DAMAGE TO VALVE.
ALL APPLICATIONS - IMPORTANT INFORMATION
• This appliance is equipped with a Safety Pilot System designed to shut itself off if enough fresh air is not available.
Additional ventilation may be optained by opening a window or a door to another room.
• Matches, paper, garbage, or any other foreign material MUST NOT be thrown on top of burner medium or into
the flames.
• Avoid contact with the burner, burner medium, grate or any other part which may be hot.
• Always ensure that the fireplace screen is closed when the appliance is operating.
NOTE: Any beeping or unexpected shutdown may be the over-temperature safety feature in the receiver. If this
happens, move the receiver into a cooler area, and/or use the RH3 remote house (Figure B Above).
REMOTE RECEIVER PLACEMENT (“-SE AND “-RE” MODELS)
FIGURE 32
A) Remote Receiver
for “RE” and “SE”
Models
B)
The Remote Receiver (-RE and -SE models) can be adversely affected by heat and must be placed as far forward and
to the side of your ALTERNA™ as possible (Figure 31A). Our optional Ceramic Remote House accessory (Figure
31B, Item “RH3”), offers heat protection for the Remote Receiver while being pleasing to the eye (remove plastic heat
shield form receiver before placing inside remote house). When connecting receiver to Motor drive (“-RE” models) or
Solenoid (“SE models) be sure to match red and black connectors, red to red and black to black).
Remote Receiver
in Remote House
(RH3)