Shelter Furnace SF2400 Owner`s manual

SHELTER FURNACE
WOOD AND COAL BURNING
INDOOR FURNACE
MODEL: SF2400
Manufactured by:
Shelter Furnace
10950 Linpage Place
Saint Louis, MO 63132
1-800-875-4788
August 2013
Revision II
MADE IN USA
Tested to UL391
Standards
SHELTER INDOOR FURNACE MANUAL
SF2400
SAVE THESE INSTRUCTIONS
Congratulations! You have selected the finest quality wood and coal burning indoor furnace, manufactured with pride in the
USA. Please take a few moments to carefully read the owner’s manual. By taking the time to familiarize yourself with your
new Shelter Furnace, you will be able to look forward to years of trouble-free, dependable service.
Installation:
First: Check local codes. The installation must comply with all local rules and requirements.
Furnace installation is to be performed by a qualified installer. This furnace must not be installed in trailers, modular or mobile
homes. Always have a properly installed and functioning smoke detector in your home. To prevent accidental injury, do not
allow anyone who is unfamiliar with the furnace to operate it. Spend time familiarizing yourself with your Shelter Furnace,
especially the different settings and the effects they have on burn patterns. It is impossible to predict how each setting will
affect your furnace due to variations in conditions, fuels and temperatures.
Transportation Damage:
Every effort has been made to ensure that your Shelter Furnace will arrive in perfect condition. Any visible damage should be
noted on the freight bill at the time of delivery. If upon unpacking your Shelter Furnace you find damage has occurred during
transit, notify your supplier immediately. Your supplier will advise you what actions must be taken to address the problem.
Disclaimer Notice:
The listed BTU rating for your new Shelter Furnace was obtained using laboratory calculations. The actual BTU output you
experience may vary somewhat depending on the type, condition and moisture content of the fuel used, damper adjustment,
chimney type and other factors. Therefore, the manufacturer disclaims any guarantee as to the BTU output or capacity.
Shelter disclaims any responsibility for the following: installation of a furnace that has been altered or modified in any way;
installation of the furnace other than as instructed in this manual; installation and/or use of any component or part not
approved by Shelter for use with this furnace. Be sure to complete and return your warranty card within 30 days of purchase
in order to activate warranty coverage on your furnace.
Manufacturer’s Notice:
Please be advised that we periodically make changes to improve our products, therefore the information in this manual may
not be completely applicable to your Shelter Furnace. Please refer to markings on the appliance for additional information.
THIS IS A WOOD AND COAL BURNING FURNACE ONLY AND SHOULD NOT BE
ALTERED IN ANY WAY.
1
TABLE OF CONTENTS
General Information 3
Location and Installation 3
Assembly of Unit 4
Blower and Housing 4
Filter Box 5
Junction Box/Thermo-Disc 6
Chimney Types and Recommendations 7
Duct Runs 9
General Operation 10
Types of Wood to Use 10
First Wood Fire 11
Loading Wood 12
First Coal Fire 12
Disposal of Ashes 13
Creosote Formation 13
Creosote Prevention 13
Chimney Fire Warning 13
Power Failure 13
Canadien Requirements 14
Furnace Diagram with Parts List 15
Grate System Diagram - SF2400 16
Blower Motor Assembly Diagram 16
Wiring Diagram 17
Troubleshooting 18
Warranty Information 23
DOUBLE CHECK TO MAKE SURE YOU HAVE RECEIVED ALL OF THE
REQUIRED COMPONENTS. IF YOU FIND THAT THERE IS A PART MISSING,
CALL 1-800-875-4788 FOR FASTEST SERVICE, PLEASE DO NOT GO BACK TO
THE STORE. THE STORE DOES NOT HAVE REPLACEMENT PARTS.
2
General Information
The Shelter Furnace has been engineered to accommodate the heating requirements of the average sized home, even during winter’s
coldest months. It is constructed with high grade, heavy gauge steel and is continuously welded to assure the highest structural strength.
In addition, the firebox is lined with firebrick to ensure many years of energy efficient service. The cast iron doors are custom fitted to
provide an airtight seal, greatly extending the burn time and ensuring maximum efficiency in fuel consumption. The heavy-gauge cast
iron grate, designed for maximum heat transfer, allows for convenient ash removal and reduced maintenance.
For comfort and convenience, a draft control and circulation blower system is included. These components furnish rapid heat
disbursement throughout your home. All of these features are standard, offering you the most efficient, durable and affordable indoor
wood and coal burning furnace.
Your Shelter Furnace is designed to be either a supplemental or central heating source for your home. This wood and coal burning
furnace may be installed in parallel with a properly operating electric, gas or oil-fired central furnace, listed or certified in accordance
with a nationally recognized safety standard, and within clearances specified on the nameplate. When in a parallel installation the static
pressure of the central furnace plenum may not exceed 0.15 water column inches and the maximum setting on central furnace limit
switch is 182°F. With the Shelter Furnace in an “Interconnection Arrangement” your furnace should be upstream of the central furnace.
The Shelter Furnace warm air supply should never be connected to return air for the central furnace. A qualified installer should perform
the installation.
IMPORTANT: FOR TECHNICAL SUPPORT OR CUSTOMER SERVICE
ISSUES, DO NOT RETURN TO THE STORE (THE STORE DOES NOT HAVE
REPLACEMENT PARTS), CALL 1-800-875-4788.
Forced Hot Air Circulation:
The plenum size of your Shelter Furnace must not be reduced to less than 10 inches in diameter or 79 square inches, and must provide a
minimum of 18 inches between the top of your Shelter Furnace and the main trunk connection. The plenum attached to the furnace must
be constructed of metal. The warm air supply duct system should be constructed of materials with a minimum temperature rating of 250°
Fahrenheit.
Clearances:
Unit must be placed on a non-combustible floor. This floor must extend at least 16 inches in front, 8 inches on either side of fuel loading
door and ash removal, underneath the chimney connector and must extend 2 inches on either side of the chimney connector. The
furnace must maintain the following clearances to combustibles:
• Heat plenum = 2 inches
• Chimney connector = 18 inches
• Front = 48 inches
• Rear = 31 inches
• Sides = 12 inches
• Main furnace = 12 inches
These are minimum clearances and should be strictly followed. In the case of a power outage, a dangerous level of heat accumulation
may develop. Do not store fuel or other combustible materials within installation clearances.
Location and Installation
NOTE: Before beginning installation, consult proper local authorities regarding local codes governing all such applications and
installations.
DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVING ANOTHER APPLIANCE. Your furnace must be placed on a
noncombustible floor. Position the furnace as close to the chimney as possible. Air for combustion must be provided into the room where
the furnace is located. Allow air free access to the furnace for combustion and ventilation.
3
RECOMMENDATION: Purchase Chimfex™ Dry Chemical Chimney Fire Extinguisher. These are readily available at most stove shops
and hardware stores. Smoke detectors should be installed on all levels of your home. Having a fire extinguisher in the furnace room or
area is strongly recommended.
Assembly of Unit
Please review the parts list and diagrams contained on pages 15 - 16 of this manual.
DOUBLE CHECK TO MAKE SURE YOU HAVE RECEIVED ALL THE REQUIRED
COMPONENTS. IF YOU FIND THAT THERE IS A PART MISSING, CALL
1-800-875-4788 FOR FASTEST SERVICE, PLEASE DO NOT GO BACK TO THE
STORE. STORE DOES NOT CARRY REPLACEMENT PARTS.
NOTE: For your convenience your Fire Chief Furnace has been factory assembled and the electrical control assembly pre-wired.
1. Fasten the right and left side angle brackets to the circulation blower using (4) ¼ - 20 bolts and nuts. Place brackets to lowest position on housing.
1/41/4-20
- 20Bolt
Bolt
AngleBracket
Bracket
Angle
Four Places
1/4-20 Nut
1/4
- 20 Nut
2. Line up the blower with the pre-drilled holes on the backside of the furnace, firmly attach with the screws provided.
Blower
Assembly
Blower
Assembly
Blower
Assembly
Mounting
Screw
Mounting
Screw
Mounting
Screw
4
3. Assemble the following parts using 6 #10 sheet metal screws. Both “B” and “C” panels should fit inside of “D” and “A” panel flanges. Attach “D” (bottom panel) to “B” (side panel with electric) and “C” (side panel). After the top and sides are assembled, attach ”A” (top panel) using 6 #10 sheet metal screws provided.
Top
Panel
(A) (A)
Panel
TopTop
Panel
(A)
#10
Metal
Screw
#10 Sheet
Sheet
Metal
Screw
#10
Sheet
Metal
Screw
Twelve Places
Side
Panel
(C)
Side
Panel
(C)
Side
Panel
Side
Panel
With
Electric
Side
Panel
with
Electric
Side
Panel
with
Electric
(B)(B) (B)
Bottom
Panel
(D)(D)
Bottom
Panel
Bottom
Panel
4. Position the assembled filter box on rear of furnace, supporting it approximately 4 inches from the floor, covering the rear
distribution blower. Make sure the filter box is tightly pressed to the back of the furnace. Use 8 #10 self-tapping
screws (included) to firmly attach the filter box to the sides of the furnace.
Filter Box
Filter Filter
Box Box
#10 Screw
#10
Screw
#10
Screw
5
CAUTION: DO NOT PLUG IN ELECTRICAL CORD AT THIS TIME
5. Mount the electrical box (A) with 4 #10 screws (provided). Remove face plate from junction box (B). Mount Thermo-disc (C) using 2 #10 screws (provided). Assemble junction box (B) to side of furnace using 2 #10 screws (provided). Mount green wire with eyelet to the bottom of the junction box mounting screw. Install wires to Thermo-disc posts. Wires are interchangeable. Re-
install junction box cover.
B
C
A
6. Plug motor into the back of the electrical box.
7. Plug the 3 pronged grounded plug into a grounded electrical outlet.
6
Install 10” starter collar and bend tabs for a tight connection to top of the furnace.
The filter box requires one 20” x 25” x 1” filter (not included, but available at most hardware and home centers).
With the connection of the chimney pipe and ductwork, your furnace installation is complete. Inspect your filter regularly and replace the
filter every 30 days during heating season for maximum efficiency.
Chimney Types and Recommendations
See Diagram on page 8.
Safety requirements demand that your Shelter Furnace be connected to “Class A” HT2100 All Fuel, or stainless-lined masonry chimney
ONLY.
By definition, “Class A” refers to either a lined masonry chimney or all fuel factory-built chimney. Although experts have expressed
differing opinions as to which system is the best, it is a matter of what you find most suitable. Regardless of your choice of chimney type,
a minimum 6-inch diameter chimney is needed. In order to create the most effective draft, the chimney size should not exceed 12 inches,
with a maximum .08 water column inches of draft. The flue draft can be measured with the use of a draft gage or manometer. If there is
more than .08 water column inches of draft, it can be adjusted with the installation of a flue damper. The stovepipe required to connect
the furnace to the chimney should be a minimum of 24 gauge black or stainless steel. NEVER USE GALVANIZED PIPE. Horizontal run
should not exceed 5 feet and should have a minimum rise of 2 inches per foot. No installation should have more than 2 elbows, a 45°
elbow is recommended over a 90° elbow.
As a safety precaution, all pipe selections should be fastened together with a minimum of 3 sheet metal screws. For your convenience,
the crimped male ends of the pipe should point toward the furnace to form drip-free connections, thereby reducing the possibility of
creosote leakage from the joints. Installing a heat reclaimer in the pipe is not recommended because it reduces the stack temperature
thus causing creosote formation. Installing a manually operated cast iron damper in the stovepipe between the furnace and the chimney
pipe is recommended. The addition of a damper will greatly assist in regulating the fire and achieving optimum results. Always install a
tee with clean-out cap to the chimney outlet on the back of the furnace. This allows for easier cleaning of the chimney system. Never
use a 90° elbow off the back of the furnace.
When using a masonry chimney, you must line the chimney with a stainless steel liner. The stainless steel liner will keep the chimney
temperature hotter for better draw and significantly reduce the creosote formation in the chimney. If using this method, a 6-inch stainless
liner should be used.
7
For the best draw,
the chimney
termination should
be at least 2 feet
above the highest
portion of the roof
that is within a 10
foot radius of the
chimney.
The termination cap
should be designed
to inhibit downdrafting without
restricing the
exhaust discharge.
USE LISTED UL 103 TYPE
HT 2100 CHIMNEY ONLY.
When using a brick chimney, you must line the entire chimney
with stainless steel liner. The liner must be a 6 inch liner.
The diameter of the chimney stack should be consistent
throughout the length of the chimney.
The chimney size should be at least as large as the exhaust
stack on the furnace, but not more than twice its size.
The chimney stack should have a built in airtight clean out.
WARNING: Do not operate with clean out uncapped.
8
WARNING- RISK OF FIRE:
• Do not operate with flue draft exceeding .08 water column inches (19.9 Pa).
• Do not operate with fuel loading door or ash drawer open.
• Do not store fuel or other combustible materials within marked installation clearances.
• Inspect and clean flues and chimney regularly.
DANGER: Risk of Fire and Explosion. Do not burn garbage, gasoline, naphtha, engine oil, or other flammable liquids/inappropriate
materials.
WARNING:
• NEVER use galvanized pipe in your chimney connection, it produces poisonous gases when subjected to extreme
temperatures.
• USE only lined masonry or manufactured Class “A” HT2100 All Fuel Chimney for your furnace.
• INSPECT chimney system periodically for structural integrity.
• CLEAN the chimney system regularly to prevent creosote accumulation.
• DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVING ANOTHER APPLIANCE.
Duct Runs
Ductwork should be designed so the external static pressure does not exceed .02 water column inches while developing air velocities
of 450 - 600 feet per minute at the registers. The heat outlet area should never be less than 10 inches round or 79 square inches. The
furnace can be installed with a cold air return system, or the return air can be drawn from the basement. If the return air is drawn from
the basement, you will have to install 3 “open and close” air register vents in the return air duct connected to your existing furnace; the
air will take the path of least resistance without using ductwork to connect the two together. The return air system should be a minimum
of 10% larger than the heat outlet to readily transfer the cold air back to the furnace. Avoid using 90° elbows in duct runs; 45° elbows
provide better airflow and less resistance. CAUTION: The warm air supply outlet of the supplementary furnace should not be connected
to the cold air return inlet of the central furnace, because a possibility exists for components to overheat and cause the central furnace to
operate other than intended.
OPEN/CLOSE
RETURN DAMPERS
3 PLACES
SUPPLY DUCT
BACK DRAFT
DAMPERS
9
RETURN AIR DUCT
IMPORTANT: FOR TECHNICAL SUPPORT OR CUSTOMER SERVICE
ISSUES, DO NOT RETURN TO THE STORE (THE STORE DOES NOT HAVE
REPLACEMENT PARTS), CALL 1-800-875-4788.
BURN WOOD AND COAL ONLY!
General Operation
NOTE:
Types of Wood to Use:
We advise using only dry, seasoned hardwoods in your Shelter Furnace rather than high resin woods such as pine. Firewood should be
cut at least one full season prior to the time of its intended use, for optimum heat output. Firewood should be stacked to provide a free
flow of air between the logs, thus allowing more rapid seasoning of the wood. If wood is stored outdoors, it should be completely covered
year round to protect it from moisture and exposure to the elements.
FUEL RECOMMENDATIONS: 22 inch maximum log length
Use extreme caution when opening the door during operation, temperatures can exceed 300°F. Release the latch on the fuel door. Wait
at least 10 seconds after releasing the latch, and then proceed to the fully open position. Opening the door in this manner is designed
to eliminate the possibility of gaseous ignition. Heat resistant gloves are recommended when opening the fuel door, regulating the spin
draft, or emptying the ash pan.
CAUTION: HOT SURFACES. KEEP CHILDREN AWAY. DO NOT TOUCH DURING OPERATION.
CAUTION:
• INSPECT FLUE PIPES, JOINTS AND SEALS REGULARLY TO ENSURE THAT SMOKE AND FLUE GASES ARE
NOT DRAWING INTO, AND ARE NOT BEING CIRCULATED BY THE AIR-CIRCULATION SYSTEM.
• CLEANING OF THE HEAT EXCHANGER, FLUE PIPE AND CHIMNEY IS ESPECIALLY IMPORTANT AT THE END OF THE HEATING SEASON TO MINIMIZE CORROSION DURING THE SUMMER MONTHS CAUSED BY THE ACCUMULATED ASH.
• Never use chemicals or gasoline to start or maintain your fire.
• Do not burn oil, garbage, trash, plastic, or any fuel other than wood or coal in your furnace. Doing so will void the
warranty.
WARNING: – RISK OF FIRE
• DO NOT operate with flue draft exceeding .08 water column inches (19.9 Pa).
• DO NOT store fuel or other combustible materials within marked installation clearances.
• Inspect and clean flues and chimney regularly.
• DO NOT operate your furnace with the fuel door or ash drawer open.
WARNING: NEVER fuel your furnace with wet, unseasoned wood or wood that has been exposed to a recent rainfall. Burning wood with
high moisture content will cause a rapid accumulation of hazardous creosote, which has been proven to be the most common cause of
flue fires. NEVER burn plastics, any wood product containing glue, or wood treated with chemical preservatives in your furnace. The
combustion of these substances may release harmful, toxic gases.
*BE SURE TO KEEP WOOD COVERED YEAR ROUND!*
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DANGER: RISK OF FIRE OR EXPLOSION – do not burn garbage, gasoline, naphtha, engine oil, or other flammable liquids/inappropriate
materials.
Supplemental Outside Combustion air may be necessary if:
• the solid-fuel-fired appliance does not draw steadily, smells, experiences smoke rollout, burns poorly, or back-drafts
whether or not there is combustion present. Opening a window slightly on a calm day may alleviate these symptoms.
• the house is equipped with a well-sealed vapor barrier and tight fitting windows, and/or has any powered devices
which exhaust house air.
• there is excessive condensation on windows in the winter.
• a ventilation system is installed in the house.
BURN WOOD AND COAL ONLY!
First Wood Fire:
Check to make sure the spin draft is wide open to allow oxygen into the firebox. Make sure the Draft Control is in the start position.
OPEN
CLOSE
Place several crumpled newspapers on the grate with some dry kindling layered on top of the papers, then ignite the newspaper. When
the kindling is burning, add several small pieces of wood, allow wood to fully ignite. After about 20 minutes the fire should be established,
allowing you to add more wood – do not overload which would smother the fire. Add more wood slowly, so the flames have time to engulf
the fresh wood. Once the fire is burning and there is a glowing ember bed, adjust the draft to achieve desired burn pattern. Learning how
to adjust the draft to maintain the desired temperature for your home may take several days. After a short time you will know which settings
and adjustments work best for your home.
Do not over-fire the furnace. Over-firing by overloading/over fueling the furnace causes the metal to superheat and expand, then cool
rapidly, which causes cracking, therefore voiding the warranty. Over-firing or abuse can easily be determined upon inspection.
It will take about 40 minutes to establish a bed of hot embers. Once you have achieved the hot ember bed, add larger pieces of firewood.
Within 30 to 40 minutes, adjust the spin draft to obtain optimum performance.
NOTE: Your new Shelter Furnace is capable of producing a very high BTU output. Do not fuel your furnace to capacity upon initial firing.
It’s recommended that you become thoroughly familiar with your Shelter Furnace before operating at full capacity.
The new steel and metal components of the furnace have a protective coating or paint on the surface which could produce an odor during
11
the break in period. Adequate ventilation within the home and furnace room or area is recommended during the initial firing and break
in period to accommodate this possibility. Your new Shelter Furnace is classified as having airtight construction. This type of design
should enable you to experience an average burn time between 6 and 12 hours per full load of fuel (dry, seasoned hardwood). However,
abnormally cold weather may reduce the burn time somewhat. If your burn cycle is significantly less, for instance, 2 to 4 hours, you are
over-firing your furnace. This type of occurrence is usually symptomatic of heat demands in excess of furnace capacity. Contact an
authorized professional to determine if your Shelter Furnace has been improperly sized for your home.
Loading Wood:
When opening the fuel door during operation, wait 10 seconds after releasing the first latch, then open the door the rest of the way. The
dual latch system has been incorporated as a safety feature, designed to eliminate the possibility of gaseous ignition. Laboratory testing
has determined that when incomplete combustion occurs the partially spent fuel sometimes concentrates large amounts of potentially
hazardous gases within the fire chamber. If the door is opened suddenly under these conditions, the oxygen may combine with these
gases and cause ignition referred to as “back flash.” Use EXTREME CAUTION when opening the fuel door.
When reloading the furnace, spread embers evenly over the grate. Place smaller pieces of wood or coal on the hot embers and layer
larger pieces on top of them. Finally, due to the wide variety of temperature ranges during the winter, you may experience periods when
it is not necessary to fully load the fire chamber in order to maintain an overnight burn. Your Shelter Furnace will operate at the highest
efficiency by adding fuel in amounts needed to maintain comfortable temperatures in your home.
Starting the First Coal Fire:
Burning coal is much harder than burning wood. There is more care and work in building and maintaining a coal fire than a wood fire.
Anthracite is the best coal to burn, due to its long even burn with higher heat output and clean burn quality but is more difficult to manage
than Bituminous coal.
The size of coal is important. “Nut” coal sizes of 4 inches for Bituminous and 2¾ to 4½ inches for Anthracite coal are recommended.
Never use coal other than the sizes recommended. If the coal is too small it will smother the fire and if it is too large the coal will not burn
well.
When burning Bituminous coal, start the fire with wood (as described above). Always use dry kindling, as this will provide a hotter fire
and add small pieces of wood until you get a good hot ember bed. At this point add a small amount of coal. When the coal is hot enough
to ignite, add small amounts at a time, so as not to smother the fire. Keep in mind that Bituminous coal will require more maintenance as
this type of coal will produce more soot, requiring more frequent cleaning to prevent buildup.
Also make sure that the spin draft is wide open to establish the correct burn pattern. When adding coal to Bituminous fires always add
coal to the center of the bed creating the cone effect. Bituminous coal is more volatile and adding coal to the center of the bed causes
the flames to drive off the volatile gases. Remember that no two installations and chimney set-ups are the same, so be prepared to
experiment until you achieve the desired results. Always allow enough air to the firebox and keep the damper open so that volatile gases
are properly burned. When adding fuel, remember to break up the cone with a poker if it has formed a crust, but be careful to avoid
mixing the coal as this can form clinkers. Excessive movement wastes fuel and exposes the grate to extreme heat, which will cause
warping or burnout. For overnight burn operations, follow the above instructions and adjust the chimney damper.
When burning Anthracite coal, start the fire with wood (as described above). Add layers of coal making sure not to smother the fire, the
third layer should be a little heavier, but should not extend above 2 inches below the top of the brick in the firebox. Before adding
more fuel, be sure to leave a red spot in the center of the bed. This hot spot will help ignite the gases given off the new charge. A deep
charge will give a more even heat and a longer fire. It may take up to a couple hours before the whole bed is fully ignited. When the fire
is established and the home is becoming warm, you may adjust the damper. Once the coal bed has reduced to half its original depth it
is time to add fuel to the furnace. Open the fuel door, using a small rake or hoe pull the coals towards the front of the bed, trying not to
disturb the fire too much. Next, add coal to the back, being careful not to seal off the top. Allow the ash to fall into the ash pan. Keep
the ash pan cleaned out to ensure good airflow. You may want to start this banking process early in the evening before retiring or before
leaving the home so that you may make proper adjustments after the fire is well established.
WARNING: It is unsafe to load any type of coal within 2 inches of the top of the firebrick. Load fuel carefully or damage may result.
*BE SURE TO KEEP WOOD COVERED YEAR ROUND!*
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NOTE: Do not burn coke, charcoal, highly volatile Bituminous coal, sub Bituminous, lignite or cannel coal (sometimes called channel coal
or candle coal). Never burn chemically processed logs, such as fire logs, as their use is intended for fireplaces only. Please follow all
guidelines in this manual concerning wood and coal burning applications due to safety concerns and to maintain warranty coverage.
BURN WOOD AND COAL ONLY!
Disposal of Ashes:
Heat resistant gloves are recommended, in order to remove ashes from your Shelter Furnace. Remove the ash pan from the furnace
and dump the ashes into a metal container with a tight fitting lid. The closed container of ashes should be placed on a non-combustible
floor or on the ground, well away from all combustible materials, pending final disposal. If the ashes are disposed of by burial in soil or
otherwise locally dispersed, they should be retained in the closed metal container until all cinders have thoroughly cooled.
Remove the ashes from your Shelter Furnace at least once a day, or as often as necessary to ensure the ashes do not accumulate to
the height of the grates. If ash build-up occurs at grate level, it will cause premature failure of the grate system, voiding the warranty on
the grates. Unacceptably high temperatures will result because the ashes have restricted the flow of cooling air beneath the grates. This
flow of air was designed to not only cool the grates, but also to provide warmed air for better combustion. If the ash level is improperly
maintained the firebox will be starved of combustion air, greatly reducing the efficiency and heat output of your Shelter Furnace.
CAUTION: HOT SURFACES. KEEP CHILDREN AWAY. DO NOT TOUCH DURING OPERATION.
IMPORTANT: FOR TECHNICAL SUPPORT OR CUSTOMER SERVICE
ISSUES, DO NOT RETURN TO THE STORE (THE STORE DOES NOT HAVE
REPLACEMENT PARTS), CALL 1-800-875-4788.
Creosote Formation and Need for Removal:
When wood is burned slowly, it produces compounds in exhaust smoke which combine with expelled moisture to form creosote. The
creosote vapors condense in the relatively cooled chimney flue of a slow burning fire. As a result, creosote residue accumulates on the
flue lining. When ignited, this creosote makes an extremely dangerous fire in the chimney. The chimney connector and the chimney
should be inspected at least twice monthly during the heating season to determine if a creosote build-up has occurred. If creosote has
accumulated it should be removed to reduce risk of a chimney fire.
Creosote Prevention:
To help reduce the formation of creosote within the flue, ALWAYS BURN DRY, SEASONED WOOD. Dry wood burns hotter, allowing flue
gases to maintain temperatures above 212°F which should reduce the quantity of creosote in the chimney. If the flue gas temperature
falls below 212°F, condensation occurs causing creosote formation and accumulation within the chimney.
As an added precaution, periodic chimney inspections are recommended during the heating season to determine if creosote formation
has occurred. For safety and efficiency, it is recommended that the chimney system be inspected and cleaned prior to each heating
season.
Chimney Fire Warning:
In the event of a chimney fire, take the following actions immediately:
• Activate and toss a Chimfex™ Dry Chemical Chimney Fire Extinguisher into the firebox.
• Close the ash drawer, fuel door, spin draft and turn the draft control to the lowest setting.
• Alert entire household and prepare to evacuate if necessary.
• Call your local fire department.
Power Failure:
In case of power failure, to prevent your Shelter Furnace from over-heating and causing damage to the electrical components, follow
these steps:
• Close the spin damper control on the ash drawer.
• Turn the draft control to the lowest setting.
• Do NOT add more fuel (coal or wood) to the firebox.
13
There is no warranty on electrical components damaged due to power failure.
NOTE: OVER-FIRING OR DELIBERATE ABUSE CAN EASILY BE DETERMINED UPON INSPECTION AND WILL VOID THE
WARRANTY.
Always keep your wood covered year round. Dry wood will produce a higher BTU output and a longer burn time. Refer to the nameplate
on furnace for additional information.
WARNING: RISK OF FIRE
• Do not operate with the flue draft exceeding .08 water column inches (19.9 Pa).
• Do not operate with fuel loading door or ash drawer open.
• Do not store fuel or other combustible material within marked installation clearances.
• Inspect and clean flues and chimney regularly.
THIS IS A WOOD AND COAL BURNING FURNACE ONLY AND SHOULD NOT BE
ALTERED IN ANY WAY.
Canadian Requirements for Supplemental/Add-On Furnaces
• DO NOT USE DUCT ELBOWS HAVING AN INSIDE RADIUS OF LESS THAN 6 inches (150mm) ON OIL,
ELECTRIC, OR GAS FURNACES.
• DO NOT CONNECT TO A DOWNFLOW FURNACE.
• DO NOT CONNECT DUCTWORK SO THAT A REVERSE FLOW IS POSSIBLE.
• OPERATE THE GAS/OIL/ELECTRIC/ FURNACE PERIODICALLY TO ENSURE THAT IT WILL OPERATE
SATISFACTORILY WHEN NEEDED.
• CERTIFIED FOR INSTALLATION WITH APPROPRIATE DUCTWORK CONFIGURATIONS ONLY.
• DO NOT RELOCATE OR BYPASS ANY OF THE SAFETY CONTROLS IN THE ORIGINAL GAS/OIL/ELECTRIC
FURNACE INSTALLATION.
• DO NOT CONNECT TO ANY GAS FURNACE THAT HAS NOT BEEN CERTIFIED INITIALLY AS COMPLYING
WITH CAN/CGA-2.3.
• THE OPERATION OF THE GAS FURNACE MUST BE VERIFIED FOR ACCEPTABLE OPERATION BEFORE AND
AFTER INSTALLATION OF THE ADD-ON APPLIANCE BY A GAS FITTER WHO IS RECOGNIZED BY THE
REGULATORY AUTHORITY.
• DO NOT CONNECT TO ANY GAS FURNACE THAT IS NOT EQUIPPED WITH AN AIR-CIRCULATION BLOWER,
OR TO A CHIMNEY OR VENT SERVICING A GAS FURNACE OR GAS APPLIANCE.
The add-on unit should only be installed on a furnace duct system and chimney that are in good operating condition.
On a belt-driven system, blower and motor pulleys may be changed but the electrical current flowing through the motor cannot exceed the
nameplate rating. On a direct-drive system, the motor should not be changed, however, the speed of the motor may be increased. The
blower cannot be changed. This equipment should be installed, acceptable to regulatory authority, by experienced licensed personnel.
The installation should comply with requirements of CAN/CSA-B365, and changes to the installation should comply with CSA-B139 (for
oil-fired), C22.1 (for electric), or CAN/CGA-B149.1 or CAN/CGA-B149.2 (for gas-fired).
14
Furnace Diagram- SF2400
9
8
10
7
11
6
12
13
5
3
2
1
4
SF2400 PARTS LIST
15
ITEM
QTY
1
1
Ash Pan Tray
PART DESCRIPTION
PART NUMBER
2
1
Draft Control
FCDCA
3
1
Furnace Shell
FC45SHELL
4
1
Right Side Panel with Insulation
FC45RA
5
1
Thermo-Disc
FCTD110
6
1
Electrical Box
FC45ECC
7
1
Filter Box
8
1
Blower Assembly
FC45AP
FCFB
FC3SPMOTOR
9
1
Top Panel
10
1
Left Side Panel with Insulation
FC45TOP
11
4
Door Hinge Pin
FCDP
12
1
Fuel Door Assembly
FCFDA
13
1
Spin Draft
FCSD
FC45LA
Grate System Diagram - SF2400
2
SHELTER PARTS LIST
1
1
10
FIRE BRICK
2
2
WOOD GRATES
Blower Motor Assembly Diagram
PARTS LIST
ITEM
1
2
3
4
QTY
1
1
1
1
DESCRIPTION
BLOWER WHEEL
BLOWER HOUSING
MOTOR CAPACITOR
BLOWER MOTOR
2
1
3
SHELTER PARTS LIST
4
1
1
BLOWER WHEEL
2
1
BLOWER HOUSING
3
1
MOTOR CAPACITOR
4
1
BLOWER MOTOR
16
WIRING DIAGRAM
Wiring Diagram
BLACK
(L1)
BLACK
L1
WHITE
(L2)
THERMAL
FAN
CONTROL
SWITCH
GREEN
(GRD)
L2
L3
L4
BLOWER
MOTOR
JUNCTION BOX
THERMO SWITCH
BOX
Adjusting the Thermo-Disc
Your SF2400 comes with an adjustable Thermo-Disc that turns the blower on and off automatically. The settings are
preset at the factory to turn the blower on at 125 degrees F and off at 105 degrees F. If needed, the Thermo-Disc temperature can be
changed to allow the blower to turn on or off at a lower or higher temperature.
Note: The adjustment settings on the Thermo-Disc will always be 20 degrees apart for on and off operation. For example, if the setting on
the Thermo-Disc is at the highest temperature 130 degrees F, the blower will turn on at 130 and turn off at 110 degrees F.
See illustration below to adjust settings.
Note: Never attempt to make adjustments while a fire is burning in the furnace.
1. Make sure power cord is disconnected from electric outlet. Caution to prevent electrical shock never attempt to adjust Thermo-Disc
with electric connected.
2. Remove cover from 2” X 4” electric junction box on side of furnace.
3. Adjust the dial on the Thermo-Disc clockwise for the blower to turn on and off at a higher temperature.
4. Adjust the dial counter clock wise for a lower temperature.
5. After the adjustment has been made replace cover on electric junction box and plug power cord back into electric outlet.
TURN POINTER CLOCKWISE
TO INCREASE FAN CUTOFF
TEMPERATURE
(FACTORY SETTING-125 DEG F)
0
11
0
12
100
0
13
17
Troubleshooting
1.
2.
Problem: Circulation blower will not turn on.
Possible Causes:
• Defective fan Thermo-Disc switch.
•
Defective motor.
•
Contact your supplier for replacement.
•
Improper wiring.
•
Review wiring diagram. If wired correctly, seek professional
assistance.
•
Defective capacitor (makes
humming noise without engaging
motor.)
•
Replace capacitor.
Problem: Circulation blower runs constantly.
Possible Causes:
• Improper wiring.
•
3.
Remedies:
• If the blower fails to run, replace the fan Thermo-Disc switch.
Backdraft damper is in the
“closed” position.
Remedies:
• Review wiring diagram. If unit is wired correctly, seek professional
assistance.
•
Open backdraft damper.
Problem: Circulation blower vibrates during operation.
Possible Causes:
• Screw on squirrel cage is not
tight.
Remedies:
• Check squirrel cage alignment and position so that it does not drag
on the housing during rotation, then tighten the screw sufficiently to
fasten the squirrel cage securely to the shaft.
•
Balance weights on squirrel cage
have become dislocated.
•
You may attempt to adjust the weights yourself to obtain an
acceptable balance. If you are unsuccessful, contact your supplier.
•
Defective main bearings.
•
Return the blower to your supplier for replacement.
18
4.
5.
Problem: Flames discharging from fuel door during reloading.
Possible Causes:
• Opening the door has provided
additional oxygen which has
ignited the accumulated gases
from partially spent fuel.
•
Cast iron damper in the
“CLOSED” position.
•
Open damper.
•
Insufficient natural draft or an
obstruction in the flue system.
•
See #6 and #9.
•
Fire chamber filled to capacity
with unburned fuel.
•
Do not attempt to overload the furnace.
Problem: Excessive dirt accumulation surrounding air registers in the home.
Possible Causes:
• Furnace is not connected to
return air duct and is drawing
dirt from furnace room floor and
disbursing it throughout home.
•
6.
19
Remedies:
• Always open the door cautiously and allow the safety latch system
to perform its designed function, containing gases within the fire
chamber.
Filter box not installed, or no filter
in filter box.
Remedies:
• Connect to return air duct system.
•
Install filter box on furnace. Install filter in filter box.
Problem: Smoke from the fire chamber is puffing back through the draft control.
Possible Causes:
• Furnace is not connected to
return air and is drawing smoke
fumes from the flue.
Remedies:
• Connect to return air duct system. Or room may be too airtight, refer
to “Location and Installation” section on page 3.
•
Excessively long run of stove
pipe from furnace to flue.
•
Relocate the furnace so the horizontal run does not exceed 5 feet
and has a 2 inch rise per foot.
•
Too many elbows.
•
The run should not contain more than 2 elbows.
•
Insufficient flue size.
•
Replace with a larger flue providing a minimum of 50 square
inches but not more than 100 square inches of draft area. If the
flue is within these specifications, check the draft with a draft gage
(manometer). Your flue should provide a minimum of .04 water
column inches and a maximum of .08 water column inches.
7.
8.
Problem: Rapid accumulation of creosote in furnace and flue.
Possible Causes:
• Use of high resin wood, such as
pine.
Remedies:
• Completely avoid using if at all possible. If hardwoods are not
available, fuel the furnace with smaller loads. This will cause the
draft control to call for more heat more often. Consequently, the fires
will be hotter, thereby reducing the accumulation of creosote.
•
Under-firing the furnace has
caused low flue gas temperature.
•
Install flue gas thermometer and maintain stack temperatures
between 300° and 400° F.
•
Insufficient chimney draft.
•
See #9.
•
Using uninsulated stove pipe
for the chimney, especially if the
construction is on the exterior of
the home.
•
DANGER: Never use uninsulated stove pipe as chimney. It must not
be used on the inside of your home due to high stack temperatures,
which create an extreme fire hazard. Uninsulated pipe cannot be
used as an outside flue because it causes rapid cooling of the stack
gases, which causes them to condense as creosote on the inside of
the flue.
•
Improper connection in stove
pipe causing air leakage or a
structural defect in the chimney
itself.
•
Inspect entire flue run, from the exhaust stack of the furnace to the
termination cap. Repair as necessary.
•
Fire box not receiving adequate
amount of oxygen.
•
Furnace room may be too airtight to supply sufficient amount of
oxygen for combustion. Install an aperture to the outside consisting
of a minimum of 12 square inches or 4 inches round.
•
Use of an unlined masonry
chimney with a large clay tile
opening.
•
Install stainless steel liner in masonry chimney to reduce creosote
formation and improve draw. Use appropriate size stainless liner for
the furnace.
Problem: Bugs found in wood.
Possible Causes:
• Wood has rotted or has been
laying around for an extended
period of time.
Remedies:
• Inspect the wood for obvious signs of insect infestation such as
burrows or holes, avoid using if possible. Do not store wood indoors.
20
9.
Problem: Down draft on chimney caused by one or more of the following.
Possible Causes:
• Cast iron damper in “CLOSED”
position.
Remedies:
• Open damper.
•
Flue has a cold spot which
inhibits exhaust discharge from
rising properly.
•
This problem may occur in factory built flues because the insulation
has settled or a seam has ruptured. In masonry flues, mortar loss
may be causing seepage of cooler outside air into the stack. Check
entire flue for structural integrity and leakage. Correct or repair as
needed, or replace or re-line the chimney.
•
There is an obstruction outside
chimney, such as a tree.
•
Remove obstruction.
•
Flue is located too close to the
peak of the roof or does not rise
above it to provide the proper
draft.
•
Increase chimney height.
•
Backdraft damper is in the
“closed” position.
•
Open backdraft damper.
10.
Problem: Odor detected in home during initial firing.
Possible Causes:
• There is an oily film that remains
on the steel after the manufacturing process. Firing the
furance has raised the temperature of the fire box to a level that is
sufficient to vaporize the residue.
11.
Remedies:
• The odor should disappear after a few hours of usage.
Problem: Excessive smoke discharge from fuel door during reloading.
Possible Causes:
21
Remedies:
•
Cast iron damper in the
“CLOSED” position.
•
Open damper.
•
Excessively long stove pipe run
from furnace flue.
•
See #6.
•
Too many elbows.
•
See #6.
•
Insufficient draft.
•
See #6.
•
Excessive smoke accumulation.
•
See #9.
12.
Problem: Home does not achieve comfortable temperature.
Possible Causes:
• Improper ductwork connection to
existing furnace.
Remedies:
• Refer to information in the manual relating to the proper installation
procedures or contact your local heating and cooling contractor.
•
Improperly sized ducting.
•
Refer to information in the manual relating to the proper ducting
procedures or consult your local heating and cooling contractor.
•
Excessive dirt accumulation in
air filter.
•
Check and replace filter. Proper filter size is 20” by 25” by 1.”
•
Combustion chamber not
receiving an adequate amount
of oxygen.
•
Furnace room may be too airtight. Install an aperature to the outside
consisting of a minimum of 12 square inches or 4 inches round.
•
Furnace size is inadequate for
your home.
•
Consult a professional to determine correct sizing.
•
Fueling furnace with wet or
unseasoned wood.
•
Completely avoid using if at all possible. If circumstances
necessitate the use of wet or unseasoned wood, then fuel the
furnace with smaller loads.
22
Warranty Information
CERTIFICATE OF LIMITED WARRANTY:
EXTENT OF COVERAGE: This warranty covers any Shelter Furnace sold in the United States and Canada. This warranty applies only
if the Shelter Furnace is installed, maintained, and operated in accordance with the instructions in the owner’s manual and local codes.
This warranty applies to the original purchaser/owner of the Shelter Furnace and is not transferable. Replacement or repair parts are
warrantied for the remaining period of the original warranty.
All warranty claims must include:
• Date of purchase
• Model and serial number
• Proof of purchase (dated invoice, bill of sale, cancelled check, or payment record)
• The name / address of the store from which you purchased the furnace
Shelter Furnace warranties the firebox and cast iron grates to be free of defects in material and workmanship for 5 years from the date
of the original purchase. The cast iron grates are warranted for 5 years so long as the furnace is operated safely in accordance with
the owner’s manual. Intentional misuse or abuse causing burn through of cast iron components is NOT warrantied. Over firing
the furnace will cause the front face to crack and is not covered by the warranty. Furthermore, some cosmetic deterioration can be
expected as the result of normal operation, therefore the physical appearance is not guaranteed to remain unchanged. The manufacturer
warranties all electrical components for 1 year and the blower motor for 1 year. Please be advised that the firebrick and door gaskets are
excluded from this warranty.
In order to exercise the aforementioned warranty, a certified professional must determine the appliance/part to be defective. He or she
must submit a written statement to Shelter Furnace detailing an assessment of the problem. This assessment MUST be accompanied
by substantiating proof of purchase (dated invoice, bill of sale, cancelled check, or payment record), model and serial number. Shelter
Furnace will then authorize repair or replacement as appropriate to the submitted claim. Shelter Furnace will not honor expenses incurred
from any action that was not expressly consented to in writing. The owner is hereby notified that he or she will be obligated to assume
liability for removal, reinstallation, shipping, and labor costs involved in servicing/repairing or replacing the part or unit. The merchandise
in question must be shipped via PREPAID FREIGHT to Shelter Furnace. Shelter Furnace will return the repaired or replacement part to
the purchaser on a FREIGHT COLLECT basis.
This warranty will be rendered null and void if this part/unit exhibits symptoms of obvious over-firing, deliberate abuse or negligence,
improper installation, or is used for commercial purposes.
Finally, Shelter Furnace will not be responsible for any claim not stated in our warranty nor does any implied warranty extend beyond the
limits stated above.
Please contact Shelter Furnace with all pertinent information including daytime phone number and detailed description of the type of
problem you are having. Shelter Furnace technical service personnel will contact you as soon as possible. Call 1-800-875-4788 or mail
information to: Shelter Furnace, 10950 Linpage Place, Saint Louis, MO 63132.
23