St. Croix SCF 050 User manual

SCF-Revolution Manual
1
SCF 050
FURNACE
Installation & Operations Manual
208

SCF-Revolution Manual
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General Information .................................................................................................................. 4
Installation Check List .............................................................................................................. 5
Furnace Layout Diagram ........................................................................................................... 6
Furnace Dimensions, Location & Clearances ........................................................................ 7-8
Exhaust Venting........................................................................................................................ 10
Venting - Approved Materials .................................................................................. 10
Venting-Typical PL Vent Components......................................................................11
Venting - Determining Materials ............................................................................. 12
Venting - Termination Requirements.........................................................................13
Venting: Termination Clearance Requirements ....................................................... 14
Venting – Into an existing Chimney...........................................................................15
Combustion Air ....................................................................................................................... 16
Connecting to Existing Duct Work...........................................................................................17
Mobile Home Installation ....................................................................................................... 18
Thermostat Hook-Up .............................................................................................................. 19
SCF-050 Operation...................................................................................................................20
Installation Check.....................................................................................................20
Preventing Chimney Fires ........................................................................................ 20
Approved Fuels......................................................................................................................... 21
Burning Corn, Wheat, Rye, Pellets, Cherry Pits, Distiller’s Grain......................21-22
Control Board Features............................................................................................. 24
Pre-Lighting & Lighting instructions ..................................................................25-27
Shutting Off the furnace ........................................................................................... 27
Diagnostic & Safety Features..............................................................................27-29
TABLE OF CONTENTS

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Combustion Air Damper – Location and Adjustments............................................29-33
Thermostat Control & Pilot Settings.............................................................................34
SCF-050 Maintenance ................................................................................................34
St. Croix Clinker Theory................................................................................34
Clinker/Ash Removal.....................................................................................25
Daily Maintenance...................................................................................................36-38
Periodic Maintenance...............................................................................................39-41
Yearly Maintenance.................................................................................................42-43
Safe Operation ..............................................................................................................43
Wiring Schematic..........................................................................................................44
Electrical Layout...........................................................................................................45
Canadian Requirements
Installation......................................................................................................46
Operation........................................................................................................46
Supplementary Furnace .................................................................................47
Troubleshooting & Frequently Asked Questions ...............................................48-52
Warranty .......................................................................................................................53
Furnace Info & Notes....................................................................................................54

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GENERAL INFORMATION
SAFETY PRECAUTIONS
SAFETY NOTICE: The furnace must be properly installed in order to prevent the possibility
of a house fire! These installation instructions must be strictly observed! The Maintenance
schedule must be followed as described in this manual. Failure to follow instructions may
result in property damage, bodily injury or even death.
The furnace’s exhaust system works with negative combustion chamber pressure and a slightly
positive chimney pressure. Therefore, it is imperative that the air intake and exhaust system be
airtight and installed correctly. Do not install a flue damper in the exhaust vent of this unit.
Do not connect this unit to a chimney flue serving another appliance.
BUILDING PERMIT
Contact the local building officials to obtain a permit and information on any local installation
restrictions and inspection requirements.
DEFINITION OF “FURNACE”
The word “Furnace” as used in this manual is interpreted to mean a corn, wheat, rye or wood
pellet burning Add On Furnace. This model is not intended as the sole source of heat.
SAFETY TESTING
The furnace has been independently tested and listed by Warnock Hersey Laboratories in
accordance with the proposed ASTM Standards and the applicable portions of UL 1482 and
ULC S627/B366.2, and Oregon Administrative Rules 814-23-901 through 814-23- 909, stating
requirements for installation as a shop heater or Add On Furnace and for mobile home
installations. The safety-listing label is located on the inside of the removable front panel of the
unit. Please refer to label for pertinent information.
DISCLAIMER OF WARRANTY
Since Even Temp Company has no control over the installation of the furnace, Even Temp
Company grants no warranty, implied or stated, for the installation of the furnace and assumes
no responsibility for any special, incidental or consequential damages.
MANUFACTURED BY:
Even Temp Inc
Hwy 34
Waco, NE, 68467
Save This Installation & O
p
erations Manual

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BEFORE INSTALLATION THOROUGHLY
READ AND UNDERSTAND THIS MANUAL
SAFETY NOTICE
PLEASE READ THE ENTIRE MANUAL BEFORE INSTALLING AND USING YOUR NEW FURNACE. FAILURE
TO FOLLOW INSTRUCTIONS MAY RESULT IN POPERTY DAMAGE, BODILY INJURY, OR EVEN DEATH.
INSTALLATION CHECK LIST
FOR USE IN THE U.S. AND CANADA, MOBILE HOME APPROVED
CHECK WITH LOCAL AUTHORITIES AND OBTAIN NEEDED PERMITS
WE RECOMMEND INSTALLATION BY A QUALIFIED PROFESSIONAL.
BEFORE STARTING THE FURNACE FOR THE FIRST TIME
1. Under certain conditions outside combustion air is recommended. Use only approved parts. When using
out side air for combustion check that the outside air inlet is connected to draw fresh air from outside the
building.
2. All joints of PL vent and single wall stainless steel pipe should be fastened by at least 3 screws and
correctly installed. (Follow vent manufacturer’s instructions). Seal all joints with high temperature silicone
to create an airtight seal.
3. WARNING: The high temperature paint on this Furnace may take several hours of burning at a high fuel
setting to cure fully. During this time, an odor that is not harmful may be evident. When odors are present,
the area around the Furnace should be well ventilated.
4. Caution: The high temperature paint can be easily scratched prior to burning the Furnace.
CAUTION
FAILURE TO FOLLOW THE INSTRUCTIONS IN THE INSTALLATIONS MANUAL MAY RESULT
IN A HOUSE FIRE. PLEASE FOLLOW INSTALLATION AND MAINTENANCE INSTRUCTIONS.

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SCF 050
Furnace Layout
Figure 1
The SCF-050 has a large Heat Exchange system, allowing for more heat to be exchanged. The
burn system used in the furnace is the St. Croix Patent Pending “Clinker Removal System”.
This burn pot allows the clinker to be removed without loosing the fire in the pot. This eliminates
the need of having to constantly re-light the furnace after removing the clinker.

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Furnace Dimensions
Figure 2
Furnace location
When finding a location to install the furnace, several things need to be kept in mind. Consider
the following things: Service Access, Venting, Return air Duct, Supply air Duct and
Electrical.
Service Access. The front panel is removable to allow access to the ash pan and the firebox for
regular maintenance. The Control Board is mounted on the left side. There are also 2 access
panels on the left side. The smaller cover gives access to the following components: Combustion
Fan, Vacuum Switch and Proof of Fire Switch. The larger cover allows access to the Convection
Blower for maintenance when needed. The Fan Limit Control is also located on the left side.
Supply Air. The SC 050 Furnace may be connected to a gas, oil or Electric/Heat pump system
with existing duct work.
Return Air. The furnace does not need to be connected directly to the existing cold air return
system, but it is recommended.
Venting. The location should be as close as possible to an outside wall for venting purposes. The
furnace requires 4” PL Vent pipe. The shortest vent system with minimal elbows is the best.

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Clearances & Access for Service & Maintenance
Figure 3
FLOOR PROTECTION - The furnace should be installed on a non-combustible surface
extending 16” in front of the unit.
LEFT SIDE – Minimum clearance to combustibles on the right side of the furnace is 2”
ACCESS FOR SERVICE AND MAINTENANCE – The remaining clearances shown above
are required to allow access to components during service and maintenance.

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Caution
INSTALLATION IS TO BE PERFORMED BY A QUALIFIED INSTALLER OR
DEALER.
ADHERE TO ALL CLEARANCES SPECIFIED BY THE MANUFACTURER OF THE
VENTING SYSTEM USED.
ADHERE TO ALL CLEARANCES SPECIFIED IN THE INSTALLATION
INSTRUCTIONS OF THIS FURNACE.
THIS FURNACE USES A POSITIVE PRESSURE VENTING SYSTEM. DO NOT
INSTALL A FLUE DAMPER IN THE EXHAUST SYSTEM OF UNIT
DO NOT CONNECT THIS FURNACE TO A CHIMNEY SYSTEM THAT IS
CONNECTED TO ANOTHER APPLIANCE.
DO NOT INSTALL THIS UNIT IN A SLEEPING ROOM
ATTENTION
CONDENSATION: When planning the installation of your Furnace, keep in
mind that condensation is detrimental to exhaust systems. Corn, Wheat, & Rye
have higher moisture content than pellets and can be more susceptible to
condensation forming in certain types of installations. Install the Furnace with a
minimum of the system exposed to the cold temperatures outside the envelope of
the house. Check with the manufacturer of your venting system that they honor
the warranty of their PL Vent with the use of corn.
ATTENTION
BATTERY BACKUP: We strongly recommend using a battery backup system if
the furnace is installed using horizontal venting only. This prevents any smoke
from entering your home in the event of a power failure.

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VENTING: APPROVED MATERIALS
The Furnace requires a venting system approved for pellet Furnaces by a certified testing lab.
Approved pellet Furnace venting materials are: 1) PL vent, a double wall vent with a stainless
steel liner; and 2) Single wall rigid or flexible stainless steel pipe. PL Vent and Single wall vent
is available through manufacturers such as: Energy Vent LTD, James A. Ryder, Simpson
DuraVent and Selkirk Metalbestos and is carried by many local pellet Furnace dealers. In this
manual approved venting will be referred to a “PL vent” or “Single wall vent”. All single wall
vent adaptors must be stainless steel.
NOTE: TYPE “B” GAS VENT MUST NOT BE USED IN THE INSTALLATION OF THIS
FURNACE
Examples of venting system components follow:
High temperature ceramic roping reduces potential fly ash escaping through joints.
Stainless steel inner liners resist corrosive flue gas damage to the system.
Flex pipe should be stainless steel, 4 ply construction with a total thickness of approx. .07 inches.

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TYPICAL PL VENT COMPONENTS
RAIN CAP
VERTICAL OR WALL THIMBLE CHIMNEY SUPPORT BRACKET
HORIZONTAL ADAPTER
ADJUSTABLE LENGTH SINGLE TEE SINGLE REDUCTION DOUBLE TEE
PIPE w/TEE CAP TEE w/TEE CAP w/TEE CAP
PIPE ADAPTER INCREASER 45
0
ELBOW 90
0
ELBOW

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VENTING: DETERMINING MATERIALS
TYPE OF MATERIALS:
1. PL Vent must be used.
2. Exception: Single wall stainless steel may be used inside an existing chimney. (No
clearances to combustibles are needed on single wall stainless steel adaptors, rigid or flex pipe
installed within a chimney.)
3. A clean out “tee” (PL Vent or “Quick-Connect Exhaust”) must be installed directly to the
furnace and at the bottom of each vertical run of the exhaust system. These tees are to assist in
periodically cleaning the pipe. Single or double clean-out tees may be used. The exhaust system
must be installed so the entire system can be cleaned without disassembly.
NOTE: ADHERE TO THE PL VENT CLEARANCES TO COMBUSTIBLES AS REQUIRED.
STRICTLY OBSERVE THE PL VENT MANUFACTURER’S SAFETY SPECIFICATIONS.
QUANTITY OF MATERIALS:
1. It is recommended that the vent system be installed with a minimum of three feet (3’) of
vertical rise above the exhaust port on the back of the furnace.
FAILURE TO PROVIDE THE NATURAL DRAFT THAT RESULTS FROM A VERTICAL
RISE MAY RESULT IN SMOKE BEING RELEASED INTO THE HOUSE WHEN
ELECTRICITY TO THE UNIT IS INTERRUPTED WHILE BURNING OR SMOLDERING
FUEL REMAINS IN THE BURN GRATE. (See “Battery Backup” on page 9)
2.It is not recommended to run vertical venting outside the heated environment where the
furnace is installed. Running a venting system in a cold environment may cause the flue
temperatures to cool down too much for adequate drafting. See figures 5 & 6 on pages 13 & 14.
Additional vertical exhaust venting should be provided when using:
a. More than one (1) elbow or tee; and/or
b. Horizontal runs of over three (3) feet. (Horizontal runs over 10 feet not recommended)
3. For a venting system ending in a horizontal run, the exhaust pipe must be terminated by a
listed end cap or a PL vent elbow (45 or 90 degrees). Note: End caps or elbows must vent
exhaust gases away from the building.
4. For termination above the building roofline a rain cap is required.
5. The exhaust pipe on all Furnaces is 4” O.D. to accommodate a pipe adaptor.

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VENTING: TERMINATION REQUIREMENTS
In determining optimum vent termination, carefully evaluate external conditions especially when
venting directly through a wall. Since you must deal with odors, gases, and fly ash, consider
aesthetics, prevailing winds, distances from air inlets and combustibles, location of adjacent
structures and any code requirements.
1. Exhaust must terminate above combustion air inlet elevation.
2. Do not terminate vent in any enclosed or semi-enclosed area, (i.e. Carports, garage, attic
crawl space, etc.) or any location that can build up a concentration of fumes.
3. Vent surfaces can get hot enough to cause burns if touched by children. Non-combustible
shielding or guards may be required
The type of installation must first be considered before determining the exact location of
the venting termination in relation ship to doors, window, cavities or air vents. See figures
4a and 4b below.
a. Without Outside Air connected to the unit. For These types of installations please refer
to the dimensions listed below in figure 4a.
Figure 4a
4’ (1.2 m) BELOW a door, window, cavity, or air vent
Or
4’ (1.2 m) HORIZONTALLYFROM a door, window, cavity, or air vent
Or
1’ (305 mm) ABOVE a door, window, cavity, or air vent

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b. With Outside Air Connected to the unit. In this manner the appliance is a Direct Vent
Appliance (sealed Combustion System) as listed in NFPA 211-6.
3.3.3.2 Direct Vent Appliance (Sealed Combustion System Appliance) A system
consisting of an appliance, combustion air and flue gas connections between the
appliance and the outside atmosphere, and a vent cap supplied by the manufacturer, and
constructed so that all the air for combustion is obtained from the outside atmosphere
and all flue gases are discharged to the outside atmosphere.
Special Venting Arrangements are listed in NFPA 211-31
10.7.1.2 The Vent Terminal of a Direct Vent Appliance with an input of 10000 BTU/Hr or
less shall be located at least 6” from any opening into a building, and such an appliance
with an input of over 10000 BTU/Hr, but not over 50000 BTU/Hr shall not be located
less than 9” from any opening through which vent gases could enter a building, and the
vent terminal of such appliance with an input over 50000 BTU/Hr shall be located not
less than 12” from the opening.
Figure 4b
1’ (305 mm) ABOVE, BELOW OR HORIZONTALLYFROM a door, window, cavity, or air
vent.

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VENTING: TERMINATION CLEARANCE REQUIREMENTS
Figure 5
THE EXHAUST TERMINATION LOCATION MUST BE AT LEAST
1’ (305 mm) ABOVE the ground level
7’ (2.1 m) FROM a public walkway
1’ (305 mm) FROM The wall penetration point
3’ (915mm) FROM a gas meter/regulator assembly
2’ (610 mm) FROM any adjacent combustibles such as:
Adjacent buildings, fences, protruding parts
of the structure, roof eaves or overhangs,
plants, shrubs, etc.

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Venting into an Existing Chimney
Figure 6
The Furnace may be connected to an existing Class A chimney or a masonry chimney which meets the
minimum requirements of NFPA 211.
1. If the Furnace’s exhaust is connected to a masonry chimney, the masonry chimney must be free of
cracks that could leak exhaust gases or fly ash. A relining of the chimney with either PL vent or
single wall stainless steel pipe may be necessary to bring the chimney into compliance.
2. When chimneys are relined, a chimney chase cap that reduces the outlet of the chimney to the size
of the liner is required. Extend the exhaust vent above the chimney chase cap and finish it off with
a rain cap. A single wall liner may need to be wrapped with insulation to maintain adequate
exhaust temperatures when outside temperatures drop below freezing, causing the flue
temperatures to become too low.
3. Venting into the side of an existing masonry chimney must be done through a masonry thimble.
When wall penetration is necessary to access a masonry chimney, use a listed PL vent wall
thimble. (Figure 6).
4. When venting into a Class A steel chimney use an appropriate PL Vent adapter.

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COMBUSTION AIR
1. Under certain conditions it is recommended that the Furnace be connected to an outside source of
combustion air to improve Furnace performance. Flexible metal hose, such as ClevFlex, or rigid
metal pipe, (conduit), must be connected around (NOT INSIDE) the combustion air inlet tube
(Figure 11A). Be careful not to pinch or bend the outside air pipe with too small a radius which
may e terminated flush with the outside wall but should be protected from wind and weather by a
hood. Note: The outside air pipe must terminate above the maximum snow line.
Figure 7
2. Outside air may be drawn from a semi-enclosed attic or crawl space or any semi-enclosed space.
Take care not to draw cold air past water pipes that may freeze.
3. Increase the outside air pipe diameter to 3” for runs over ten (10) feet and elevation over 4,000 feet.
Note: Long runs should be avoided.
4. Terminate the outside air pipe below the exhaust vent outlet.
5. 5. An open mesh screen should be placed over the outside air pipe opening to prevent birds or
rodents from nesting in the opening. Use an elbow or shield to prevent prevailing winds from
blowing directly into the outside air intake pipe. NOTE: Mesh screen should be no smaller than
one-fourth inch (1/4”) by one-fourth inch (1/4”).
WARNING: OUTSIDE COMBUSTION AIR IS REQUIRED FOR ALL MOBILE HOME
INSTALLATIONS!
WARNING
USE THE AIR INTAKE
DAMPER FOR
ADJUSTING
COMBUSTION INLET
AIR ONLY! OTHER
METHODS OF
RESTRICTING OR
BLOCKING
COMBUSTION INLET
AIR ARE STRICTLY
PROHIBITED!

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Connecting To Existing Duct Work
Figure 8
The SCF-050 may be connected to the existing ductwork of a Gas, Oil or Electric / Heat Pump
furnace. The duct work of the furnaces may not be hooked in series with each other. This means the
Warm Supply Air of the SCF-050 may not be hooked the Cold Air Return of the existing furnace. See
example in figure 8 above. The Cold Air return of the SCF-050 is connected to the Return Air Duct of
the existing furnace. The Warm Air Supply of the SCF-050 connects to the Supply Plenum of the
existing furnace. Back Draft Dampers must be used in the SCF-050 Warm Air duct and in the Warm
Air Plenum of the existing furnace to prevent the air flow from reversing. It is recommended to enter
the Supply plenum of the existing furnace above the Air Conditioning A coil. The materials used for
the Warm-Air supply duct must have a minimum temperature rating of 250 degrees F. The Plenum of
the SCF-050 must be constructed of metal. Once installed as an Add On furnace check the Static
pressures in the ductwork to make sure they do not exceed the limits on the existing Central furnace or
of the SCF 050. Running both furnaces at the same time should not cause any nuisance tripping of the
High Limits in either unit.
Follow all instructions when connecting to existing ductwork. Connecting the Warm Air Supply
to the Cold Air return may cause harm to the existing furnace and may void the warranty of
both the existing furnace and the SCF-050.
CAUTION: Do not connect an air conditioning system to this unit.

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Blower Specs
The Blower is a 2-Speed blower. (600 – 800 CFM) When
connecting this unit to a duct system, the high speed
should be used. If the Furnace is to be used as a stand-
alone shop heater, the option is available to select the 600
CFM setting or the 800 CFM setting. The slower speed
will produce higher air temperatures because the air
moves slower through the heat exchange system,
allowing it to become hotter.
Minimum Duct Size
Round: 10”
Rectangular: 6” x 15”
Intake Air Duct should be 10% larger
Maximum Static Pressure: .4”
Velocity: 1400 FPM at the above mentioned duct sizes.
A larger duct size will produce less Air Flow noise; the above-mentioned sizes are the minimum
allowed.
Fan Limit Control
The Furnace uses a Fan Limit Control built into the furnace centered below the 10” plenum opening.
The High Limit function of this control is set at a maximum setting of 200 degrees F.
CAUTION: DO NOT TAMPER WITH THE HIGH
LIMIT SETTING.
There are two adjustable Fan Control Settings. They control
when the Convection Blower turns on, and when the Blower
turns off. This will help control the temperature of the air
coming out of the registers. These settings may be adjusted
to accommodate customer preference. If the air seems too
cool, simply adjust the Fan Off setting higher to shut the
blower down sooner. Factory settings are shown in figure 9.
The Fan limit has a Break-Away Tab that has been removed.
When replacing a Fan Limit Control, be sure to remove the
tab as shown in figure 9.

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Mobile Home Installation
Unit must be installed in accordance with the:
Manufactured Home and Safety Standard (HUD), CFR 3280, Part 24
The Furnace has been tested and listed for mobile home installations. In addition to all previously
detailed requirements, mobile home installations must observe the following:
1. WARNING: DO NOT INSTALL IN A SLEEPING ROOM.
2. WARNING: COMBUSTION AIR MUST COME FROM THE OUTSIDE OF THE
MOBILE HOME! FAILURE TO DO SO MAY CREATE NEGATIVE PRESSURE
WITHIN THE MOBILE HOME AND COULD DISRUPT PROPER VENTING AND
OPERATION OF THE PELLET FURNACE.
3. CAUTION: THE STRUCTURAL INTEGRITY OF THE FLOORS, WALLS, CEILING
AND ROOF MUST BE MAINTAINED.
Figure 10