Scotsman Ice DB-101 User Manual
ABOUT YOUR LOCAL FIRE SAFETY REGULATIONS.
SCOTSMAN
WOOD FURNACE
Model DB-101
OWNER’S MANUAL
IMPORTANT
READ OWNER’S MANUAL THOROUGHLY BEFORE
INSTALLING FURNACE OR LIGHTING FIRE.
CONSULT LOCAL AUTHORITIES IF IN DOUBT
ALL INSTALLATIONS MUST BE MADE IN
ACCORDANCE WITH LOCAL AND STATE OR
PROVINCIAL CODES WHICH MAY DIFFER FROM
THIS MANUAL.
IMPROPER INSTALLATION WILL RESULT IN
VOIDING OF WARRANTY.
SCOTSMAN WOOD FURNACE – INSTRUCTION MANUAL
TABLE OF CONTENTS
Specifications 2
1.0 Operating Instructions 3
1.1 Introduction 3
1.2 Wood-Burning 3
1.3 Storage of Wood 4
1.4 Maximum Solid-Fuel Charge 5
1.5 Maintenance 5
1.5.1 Cleaning 5
1.5.2 Servicing 6
1.6 Safety 6
1.7 Controls 6
1.8 Electrical Power Failure 7
1.9 Homeowner Checklist 8
2.0 Installation Instructions 8
2.1 Introduction to Installers 8
2.2 Uncrating 9
2.3 Locating the Furnace 9
2.4.1 Combustion Air Supply 10
2.4.2 Flue Pipe & Chimney 10
2.5 Clearances 12
2.6.1 Free-Standing 13
2.6.2 Add-On 13
2.7 Duct Connection 15
2.8 Control System 16
2.9 Installers Checklist 17
Appendices
APPENDIX A – Warranty
DIAGRAMS
S101-1 Add-On to Oil – Clearances
S101-2 Add-On to Oil – “S” type duct
S101-3 Gravity Return Air Kit
S101-4 Base for use on Combustible Floor
S101-5 Controls Placement
S101-6 Add-On to Oil – Electrical Schematic Belt Drive
S101-7 Add-On to Oil – Electrical Schematic Direct Drive
S101-8 Add-On to Oil – Electrical Schematic Direct Drive
S101-9 Clearances Free Standing
S101-10 Cleaning
S101-11 Free Standing Wiring Diagram
S101-12 Approved Furnace Ductwork Configurations
S101-13 Prohibited Furnace Ductwork Configurations
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SCOTSMAN WOOD FURNACE – INSTRUCTION MANUAL
KERR SCOTSMAN Wood Furnace Model DB-101-ADD
Tested and Listed by: Energy Testing Laboratory of Maine
Certified by the Canadian Standards Association (CSA) Sept. 1981
COSP No. WCP 001 – Free-Standing
COSP No. WCP 005 – Add-On
Manufactured by: Parrsboro Metal Fabricators Ltd.
P.O. Box 637, Crossroads
12118 Highway 209
Parrsboro Nova Scotia, Canada
B0M 1S0
SPECIFICATIONS
Length 39”
Width 29”
Height 44 1/2”
Shipping Weight 392 lb.
Fire Box 1/8”plate Length 36”
Diameter 23”
Secondary Heat Exchanger 14 gauge steel
Fire Box Door Cast Iron 13” x 13”
Warm Air Plenum 32 1/4” x 25 1/2”
Return Air Plenum N/A
Air Filter Size 20” x 20”
Blower Size G9 – 10
Blower Motor 1/4 hp
C.F.M. 1000 (Required)
Smoke Pipe 7” Inside Diameter
Floor to smoke pipe center 38 3/4”
Output (max) 140,000 Btu/h
Fuel Wood 30” logs
Electrical Rating Volts 120, Cycles 60, Amps 15
NOTE – Keep this manual in a safe place for future reference. Follow manual carefully
for the correct way to install and operate this unit.
CAUTION – Do not fire this unit until operating instructions have been read and fully
understood.
INSTALL WOOD FURNACE ONLY ON A FURNACE DUCT SYSTEM
AND CHIMNEY THAT ARE IN GOOD CONDITION.
SAVE THESE INSTRUCTIONS
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SCOTSMAN WOOD FURNACE – INSTRUCTION MANUAL
1.0 OPERATING INSTRUCTIONS
1.1 INTRODUCTION
Congratulations on your purchase of the KERR SCOTSMAN Wood Furnace.
Developed in Atlantic Canada, this KERR Furnace has been designed to allow you to
heat your home with wood, one of North America’s most abundant fuels. Designed with
you in mind, the KERR SCOTSMAN Wood Furnace will provide you with many years of
safe, efficient central heating.
To ensure you have a clear understanding of the operating procedures of this furnace,
please take the time to read the remainder of this section on operating procedures. If
you have any questions, your KERR DEALER will be happy to answer them for you.
1.2 WOOD-BURNING
The SCOTSMAN Wood Furnace will burn most wood fuels, however it is recommended
that only dry, seasoned hardwood be used as much as possible since it affords cleaner,
safer and more efficient operation. Burning seasoned hardwood will leave less ash,
soot and creosote residue and will require fueling less often. Use smaller loads of wood
on warmer days.
WARNING: DO NOT use chemicals or fluids to start the fire or during operation.
DO NOT burn driftwood or manufactured logs (compressed wood).
Before adding fuel to an existing fire turn up the thermostat for about five minutes or lift
damper chain to hold damper fully open for about one minute before opening the
loading door. This action will allow residual smoke to clear from the combustion
chamber and reduce smoke entering the basement during refueling.
Twice daily refueling may be sufficient in modern well-insulated homes. However,
KERR recommends that small fuel loads be added morning, noon and early evening
and late evening, rather than large quantities infrequently. A small intense fire will burn
more efficiently than a large smoldering fire in the SCOTSMAN Wood Furnace and will
produce less creosote.
When refueling the SCOTSMAN, the remaining coals should be raked to the front of the
combustion chamber before adding any new fuel. Place the fresh supply of wood to the
rear of the combustion chamber. This gives more of an even cigar type fuel burn, rather
than a large hot fire to a slow amber fire. This will help create a more even and efficient
burn. The SCOTSMAN owner should attempt to gauge fuel quantities with outdoor
temperatures; a little practice will provide greater satisfaction and efficiency.
WARNING: This furnace is not to be used with an automatic stoker.
Keep firing door tightly closed and maintain door seal in good condition.
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SCOTSMAN WOOD FURNACE – INSTRUCTION MANUAL
CREOSOTE
Wood combustion is never 100% complete. Wood smoke always contains some
unburned gases and a mixture of unburned tar-like liquids. A percentage of these
materials will condense out on any cool surface, leaving a dark brown or black
substance with an unpleasant acrid odor. This substance is commonly called creosote.
If these wood gases condense out on cool surfaces such as a cold chimney or a long
smoke pipe, they retain large amounts of water and will be very fluid. At higher
temperatures the condensed creosote will resemble tar (thick and tacky).
Creosote generation is highest during low heat outputs common with long smoldering
burns. Creosote generation is lowest during high heat outputs common with intense
fires. It is recommended that a small intense fire be used for best results against
creosote build up even though the wood furnace will require refueling more often.
Creosote generation is also higher when burning green wood. The moisture in the
green wood absorbs the heat from the fire, cooling the fire below the point at which the
creosote can be consumed. The low temperature smoke is then further cooled in the
upper furnace chambers; smoke pipe and chimney allowing large amounts of creosote
to form.
To reduce creosote build-up during periods of low heat requirements (i.e. Spring and
Fall) it is recommended to fuel the wood furnace with smaller quantities of smaller
diameter logs. Matching fuel loads and heat requirements will result in cleaner
combustion and higher efficiency.
IN CASE A SERIOUS CREOSOTE FIRE BEGINS:
o Close the damper door by disconnecting chain.
o Close all draft regulators.
o Throw 1/2 lb. of coarse or table salt on the fire and close door immediately.
o Call the FIRE DEPARTMENT at once!
Have a firmly established Emergency Procedure in place for the handling of a flue fire.
1.3 STORAGE OF WOOD
Once cut, green wood dries (or seasons), quickly at first and then at a slower and
slower rate. When the wood has been cut to the proper length and split, it should be
piled outside during the summer months. Place two poles on the ground to serve as
rails to keep the firewood off the moist ground. Stack the wood so that both ends of the
logs are exposed to the air if space is available, since more drying occurs through the
cut ends than through the sides. This is true even with wood that has been split. The
woodpile should be under cover so that it will not absorb moisture from the rain and
snow before it is used, but still open on the sides and ends to the drying effect of the
wind and sun. Store wood in neat, well-supported piles.
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SCOTSMAN WOOD FURNACE – INSTRUCTION MANUAL
1.4 MAXIMUM SOLID-FUEL CHARGE
The maximum level for a solid-fuel charge is the middle of the loading door, or the level
of the handle. DO NOT OVERFILL. The KERR SCOTSMAN Wood Furnace will accept
whole or split logs up to 34 in. (865 mm) long, but a 30 in. (765 mm) log length is
recommended for convenience and ease in handling.
Maximum damper gate opening is 11/16”. Do not tamper or adjust to greater opening in
an attempt to increase fire or over-firing and hazard may result.
1.5 MAINTENANCE
Some regular maintenance is necessary on the KERR SCOTSMAN furnace. A good
practice is to establish a routine for the storage of fuel, care of the appliance, and firing
techniques.
1.5.1 CLEANING (Fig S101-10)
The KERR SCOTSMAN Wood Furnace must be cleaned regularly to maintain top
efficiency. The furnace needs cleaning more often when burning green wood, or during
long periods of low fire. When the KERR SCOTSMAN Wood Furnace is first installed
the furnace heat exchanger should be checked visually from the firebox and smoke pipe
hole every week to determine the rate at which creosote or ash is accumulating within
the furnace. Cleaning should be done whenever there is more than 1/4 inch of build-up
on the heat exchanger or 3 inches of ash in the base. If the wood furnace is to be left
unused for an extended period of time (more than one month) then the appliance should
be cleaned of all ash and residual left from the burning of wood.
CLEANING PROCEDURE
o Make sure fire is completely out and the furnace has cooled.
o Remove the cleanout cover, located on the rear of the furnace heat exchanger, the
smoke pipe, and internal breech baffle.
o The heat exchanger is now accessible for cleaning.
o Use the scraper provided to remove all soot and ash from the furnace heat
exchanger and exposed surfaces.
o Scrape all residues in the top heat exchanger towards the rear of the furnace
where it will fall into the firebox.
o Always check flue pipe for creosote or ash build-up in the pipe and clean if
necessary.
o Reinstall cleanout cover, internal breech baffle (See section 2.4.2) and smoke pipe
making sure that all joints are secured with at least 3 sheet metal screws.
o Check chimney cleanout for ash build-up and remove any accumulation.
o Residue may be removed from the firebox or left to be burnt during the next fire. It
is good practice to leave a layer of ash approximately one inch deep in the base of
the firebox.
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SCOTSMAN WOOD FURNACE – INSTRUCTION MANUAL
DISPOSAL OF ASHES
Ashes should be placed in 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 container
until all cinders have thoroughly cooled.
WARNING – Ashes usually contain live dormant coals, which may burn for many hours
after a recognizable flame has disappeared. Use extreme caution when handling and
disposing ashes.
IMPORTANT – No other waste shall be placed in this container.
1.5.2 SERVICING
The furnace air filter must be checked monthly and replaced each year. Annually
lubricate the blower motor, if it is not permanently lubricated, with 4-6 drops of SAE-30
oil in each bearing.
CAUTION: Failure to keep air filter clean will result in poor furnace performance and
possible damage to wood furnace heat exchanger.
1.6 SAFETY
If the furnace overheats due to improper operation the following precautions should be
taken:
DO NOT shut off power. The blower must be kept running to disperse excessive heat.
Manually close the damper door by unhooking the chain. Check controls for proper
operation before starting a new fire.
WARNING – The maximum opening of the combustion air damper is preset at the
factory. DO NOT adjust the stop or attempt to increase the combustion air by any
means.
1.7 CONTROLS
Thermostat
The primary control is the room thermostat located near the center of the house on the
main floor or near an existing thermostat. The thermostat operates the damper motor to
open and close the damper door thus allowing more or less air into the combustion area
to control the fire.
Fan and Limit
The fan and limit control mounted in the plenum controls the operation of the circulating
blower and prevents the furnace from over-heating. When the air temperature in the
plenum reaches the “ON” set point of the fan switch (usually 140º F (60º C)) the blower
starts and runs until the plenum cools to the “OFF” set point (usually 100º F (38º C))
when the blower is switched off. The limit function in this control is usually set at (280º
F (138º C)) and will override the room thermostat to close the damper door if the
furnace overheats, and will also prevent the oil furnace from starting.
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SCOTSMAN WOOD FURNACE – INSTRUCTION MANUAL
1.8 ELECTRICAL POWER FAILURE (Fig S101-3)
If no one is home during a power failure, the damper will automatically close and some
gravity heating will take place. Combustion air will continue to enter through the
secondary air holes and a fire should be maintained.
IMPORTANT – This furnace is CSA certified for operation under Power Failure only if
optional gravity air inlet kit is installed.
For optimum heating during a power failure follow the procedure listed below:
For Power Failure operation remove the power failure gravity air inlet cover before
starting or refueling during power failure. The cover is an option available from your
KERR dealer. The kit must be installed on the cabinet side directly opposite to the entry
of the blower or oil furnace “S” connection ductwork.
Manually open the blower compartment access door of wood or connected oil furnace
to allow gravity flowing air to all areas. (Check with your installer).
Place a coin under the damper flap in such a way that it will fall clear when power is
restored.
Maintain a careful watch on the furnace temperature. If it should exceed 200º F (95º C)
close the damper door.
Do not leave the furnace unattended in this position.
Refuel frequently with small loads to maintain a small fire at ½ normal maximum
volume.
Do not expect to maintain maximum comfort under no power conditions.
Do not allow anyone who is unfamiliar with the operation of the furnace to attend it
during a power failure.
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SCOTSMAN WOOD FURNACE – INSTRUCTION MANUAL
1.9 HOMEOWNER CHECKLIST
o Keep area around unit clean and clear of combustibles.
o Use only dry wood. DO NOT burn garbage, gasoline or naphtha.
o Load carefully.
o Remove ashes as directed.
o Watch for soot build up in smoke pipe – clean regularly.
o Clean furnace heat exchanger regularly.
o Be aware of danger due to over firing unit.
o Do not load above maximum loading level (middle of loading door) or overheating
may result.
o This unit is NOT suitable for automatic stoking.
o Load carefully. Do not slam fuel against rear or sides of firebox. This may damage
the firebox.
o Always observe the following minimum clearances to combustible materials –
Front 48” (1220 mm); one side 6” (152 mm); opposite side and rear 24” (610 mm);
and flue pipe 18” (465 mm).
o Do not store solid fuel within the above clearances or within the space required for
charging and ash removal.
o Establish a routine for storage of fuel, care of the appliance, and firing techniques.
2.0 INSTALLATION INSTRUCTIONS
2.1 INTRODUCTION TO INSTALLERS
Before installing this KERR SCOTSMAN Wood Furnace, please read the following
instruction manual carefully. This unit is designed to be a freestanding or add-on
central heating furnace to provide complete central heating in medium sized wellinsulated homes. Before installing be sure unit is properly sized for the intended
application. Warranty does not cover misapplication of unit.
Applicable Standards
The KERR SCOTSMAN Wood Furnace must be installed in accordance with the
requirements of the National Fire Protection Association codes, the Canadian Heating,
Ventilation and Air Conditioning Code, The National Board of Fire Underwriters, and the
CSA Standards for solid fuel burning equipment as outlined in B365-01. In all cases
consult your local authorities and fire insurance company for specific regulations.
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SCOTSMAN WOOD FURNACE – INSTRUCTION MANUAL
2.2 UNCRATING
When you receive your KERR SCOTSMAN Wood Furnace, check it carefully to ensure
that all components are present and in good condition. If there has been any damage
or loss in transportation, please notify the carrier and retailer at once. Inspect for the
following:
o Firebox/Heat exchanger
o Poker/coals rake
o Marking template (return air and power failure bypass inlet)
o Internal Breech Baffle (Scotsman only)
o For free-standing model optional equipment required:
a) BC-9 Blower Kit (Scotsman only)
b) Control Kit “B” (Scotsman only)
CONTROL KIT A (Oil add-on), B (free-standing with BC–9 blower) or E (Electric add-
on) selected according to installation, which includes:
o L4064R Fan and Limit Control
o Control Mounting Plate
o Damper Motor
o Thermostat (T822D or equivalent)
o Wiring Harness and Parts
o Switching Relay R8405C (8A05A – 4) – Kit “A” & “E” only
o Transformer – Kit “B” only
NOTE: Some parts may be packed inside furnace firebox. Check shipment carefully
before assuming shortage.
2.3 LOCATING THE FURNACE (Fig S101-1, Fig S101-4)
The location of the furnace must be as close as possible to the tile-lined brick chimney,
or factory-built solid-fuel approved chimney (ULC S629). Keep in mind also the day-today operation, and place for ease of fueling and cleaning. KERR recommends
installation if possible, in a central location in relation to the outlet registers and the use
of large warm air ducts to improve heat distribution during a power failure.
It is important to provide adequate combustion air to the furnace. It may be necessary
to add a ventilator to an exterior wall of a closed furnace room or an airtight basement.
The furnace must be installed so that the clearances as shown in Fig S101-1, or those
of local authorities are met. If the furnace must be installed on a combustible floor, a
non-combustible base must be built as shown in Fig S101-4. Two layers of hollow
masonry block (4” thick) are placed at right angles to each other so that the ventilation
holes of one layer are opposite to those of the other layer. Also there must be a
minimum of one layer of fireproof board and one layer of 26 gauge galvanized metal
beneath the masonry blocks. This base must extend beyond the furnace to a minimum
distance of 18 in (457 mm) in front and 8 in. (204 mm) on all sides.
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SCOTSMAN WOOD FURNACE – INSTRUCTION MANUAL
2.4.1 COMBUSTION AIR SUPPLY
Air inlets of at least 200 square inches free area (1.5 in2/1000Btu) must be provided to
the room occupied by the wood fired or oil fired furnace. These fresh air inlets must
provide or allow free access of fresh outside air to the furnace. At no time or under any
circumstances can a wood or oil-burning appliance be starved of combustion air.
The appliance must at all times be able to maintain the approved stack draft. The
barometric draft regulator must be installed on the furnace smoke pipe in the same
room or at least in such a way that there is unrestricted free passage of air between the
combustion air inlet to the furnace or burner and the barometric draft regulator.
It is important to provide adequate combustion air to the furnace. It may be necessary
to add a ventilator to an exterior wall of a closed furnace room or an airtight basement.
Operating a wood or oil fired appliance with inadequate combustion air could be
hazardous.
2.4.2 FLUE PIPE & CHIMNEY
The internal breech baffle should be inserted through the breech towards the front of the
furnace until it hits the internal baffle stop. The open slot running the length of the baffle
should be located on the top. This baffle is removed during the cleaning procedure. The
purpose of the baffle is to prevent short-circuiting of the flue gases out through the rear
breech. The flue gases are forced to fully heat the secondary heat exchanger, which will
maintain higher furnace efficiency.
The furnace must be located to meet a minimum venting distance needed between the
furnace and the flue. It should also be ducted so that there are a minimum number of
elbows used. The flue pipe must be installed with a gradual rise of 1/2” or more per foot
from the furnace to the flue.
NEVER ALLOW THE SMOKE PIPE TO RUN DOWNHILL TO THE FLUE!
The smoke pipe and chimney should be at least 7 inches in diameter. The flue pipe or
a chimney may be of different cross-sectional area than that of the appliance smoke
pipe, provided that sufficient draft is available at the appliance. Space must be provided
around the smoke pipe and the back of the furnace to allow easy access for the
purpose of cleaning. Smoke pipes must not be lighter than 24 gauge black steel. All
pipes must be securely fastened with at least 3 sheet metal screws at every joint, and
properly supported.
Always meet or exceed flue pipe clearance specifications - 18” clearance from flue pipe
to combustibles in all directions.
Connect the furnace only to an approved chimney suitable for solid fuel appliances and
capable of venting the products of combustion. The chimney must be installed with
proper clearances above roof and from adjacent structures and trees. If a masonry
chimney is used it must be in good condition and be equipped with a tile liner. Flue
thimble or flue pipe must not extend into the chimney flue, as it will reduce the draft.
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