NorthStar Corn Stove Model # CS550

NorthStar Corn Stove Model # CS550
MSTOVEF
Proven Performance
™
NorthStar Corn Stove Model # CS550 (Item #173780):
A freestanding room heater that burns shelled feed corn.
Manufactured by the skilled workforce at:
Northern Tool & Equipment Mfg.
2050 Airtech Rd.
Faribault, MN 55021
NorthStar Parts and Service 1-800-270-0810
Quick Facts:
Installation: Before installing your NorthStar Corn Stove, please read and follow all instructions contained in this manual.
A fire hazard may result if installed incorrectly. Consult local building and fire codes for additional
requirements. Removal or reinstallation costs are not covered by this product’s warranty.
Before cutting holes in your wall, make sure the stove is placed where you want it and check for electrical
wires and plumbing pipes. Cut holes between studs. Use a stud finder to check for studs. Use a long
1/4 drill bit to drill a center point through both walls. Use this center point to make sure the inside and
outside wall holes line up.
Buying Corn: Use cleaned shelled feed corn with 14% or less moisture content only. Buy corn in bulk or bagged from
feed stores, elevators or direct from a farmer. Corn with 11-12% moisture content works best.
Mix 1 to 2 handfuls of oyster shells (North Star #PD366991 or available at feed stores) with each
hopperful of corn.
Starting:
1.) Fill hopper with corn.
2.) Set damper to first notch (see page 7).
3.) Rotate Heat Setting to #1.
4.) Place Mode Selector to Start.
5.) Place crumbled fire starter blocks in corn pot, light with match and close the door.
6.) Use Feed Control to manually prime the corn into the fire pot.
7.) When the Corn Stove warms up, the room blower and automatic corn feed will start. After this point
place Mode Selector switch to Run.
8.) Rotate Heat Setting to desired setting.
9.) Adjust damper to achieve cleanest burn.
10.) The first time the stove is operated, oils will burn out of the fire chamber and create an odor and
possibly some smoke. This will stop after the first 15 minutes of operation.
Stopping:
1.) Rotate Heat Setting to OFF position.
Maintenance: Unplug the Corn Stove before servicing.
Oil blower motors annually. 5-10 drops SAE 20 non-detergent oil.
Check/Clean exhaust piping weekly.
Clean combustion chamber weekly.
SAVE THESE INSTRUCTIONS
1
Table of Contents
Quick Facts
Unpacking the Stove
Buying Corn
Oyster Shells
Installation Instructions
Additional Requirements for
Mobile Home Installations
1
2
3
3
4-6
6
Operation Instructions
Maintenance Instructions
Troubleshooting
Parts Breakdowns
Electrical schematic
Thermostat Installation
7
8
9-10
11-14
15
16
Unpacking the Stove:
Remove Cornstove from box and pallet
fig01037
The following items are packed in the drawer
fig01038
Firestarte
r
Bricks
Qty 2
Scraper Rod
Qty-1
2
Buying Corn
The corn you use will affect the dependability and heat output of your stove. Take the
time now to read through this page before using your stove. Enjoy your NorthStar
Corn Stove!
Ask for cleaned corn when buying it from your corn supplier. Buy cleaned corn in bulk or bagged
from feed stores, elevators or direct from a farmer. Corn right from the field will have debris that can
clog the auger. This will result in an unreliable burn requiring constant attention to the stove’s draft
setting. In most cases, debris will eventually cause the flame to go completely out.
Store your corn in a dry place. Check the moisture content periodically to make sure it is not wet.
The moisture content needs to be 14% or less, 11-12% works best. Wet corn will cause unreliable
burn, low heat output, and deterioration of the stove and exhaust piping. Using corn over 14%
moisture will void your warranty.
There are many varieties of corn with different kernel sizes. Your stove burns best with small to
medium sized kernels. Try to buy your corn from the same place. Changing corn suppliers
frequently will cause a different flame requiring different draft settings. DO NOT USE CORN WITH A
HIGH WAX CONTENT!
DO NOT BURN SEED CORN! Seed corn is treated with pesticides that can be fatal if swallowed.
Therefore, seed corn is dangerous to have around the house, especially when children are present.
Oyster Shells
Unburned corn kernel starches cling to the fire pot and form solid masses called
clinkers. Clinkers will plug the air inlet holes in the fire pot and cause the stove to
prematurely burn out.
Oyster shells, when mixed with corn, drastically reduce clinkers. This results in lower
maintenance, less ash, cleaner burn pot, and higher heat output. If you don’t use
oyster shells, your stove will require more attention and will not burn reliably.
Where to buy oyster shells
Oyster shells are fed to chickens, so they are sold at most feed stores. If you cannot find oyster
shells locally, please call NorthStar at 1-800-270-0810. (NorthStar Oyster Shells #PD366991).
How much oyster shells to use
The amount of oyster shells used depends on the starch content of the corn. If your corn has a low
starch content, less oyster shells can be used. High starch content corn will require more oyster
shells. Initially, use 1 to 2 handfuls of oyster shells per hopper of corn. Run the stove for a day, if
there is any buildup of clinkers on the stirrer shaft, increase the amount of oyster shells.
3
Installation Instructions:
When this corn stove is not properly installed, a house fire may result. To reduce the risk of fire, follow the installation instructions.
Contact local building or fire officials about restrictions and installation inspection requirements in your area.
This corn stove must be connected to an exhaust system (chimney) that vents outdoors. Do not connect this corn stove to a chimney
flue serving another appliance.
Please read this entire manual before you install and use this new corn stove. Failure to follow instructions may result in property
damage, bodily injury, or even death.
1.) Floor Protection
A.) The floor must be protected directly under the stove
B.) The floor must be protected 6” beyond the viewing and ash door and 6” beyond each side of the stove.
C.) Use non-combustible materials such as ceramic tile or concrete for floor protection.
6"
6"
NON-COMBUSTIBLE
FLOOR PROTECTION
6"
2.) Minimum Installation Clearances to
Combustible Materials
1"
A.) 1” minimum clearance to back wall from heater
and chimney connector.
B.) 1” minimum clearance to side wall from heater
and chimney connector.
C.) Install vent piping at clearances specified by the
vent manufacturer.
NOTE: These are minimum clearances from
combustible materials such as shelving or furniture
as established by a nationally recognized testing
laboratory. The clearances for the side walls should
be 24” so side panels can be opened for servicing the
stove.
1"
1"
TOP VIEW OF STOVE
FIG00981
4
3.) Exhaust system (venting).
Attention! Before cutting holes in your wall, make sure the stove is placed where you want it and check for electrical wires and
plumbing pipes. Always check dimensions of stove and wall thimble before cutting hole in wall. Cut holes between studs.
Use a stud finder to check for studs. Use a long 1/4 drill bit to drill a center point through both walls. Use this center
point to make sure the inside and outside wall holes line up.
Do not install a flue damper in the exhaust venting system of this unit.
A.) The entire exhaust system must be 3” or larger UL approved type “L” vent pipe.
B.) The exhaust system must include the following components:
a.) Pipe adapter (seal to exhaust outlet gas tight with high temperature RTV silicone sealant).
b.) Cleanout Tee
c.) At least 3 ft of vertical pipe.
d.) Wall support every 4 ft of vertical pipe.
e.) No more than 4 ft of horizontal pipe.
f.) Minimum 3” clearance from exhaust pipe to combustibles.
g.) Wall thimble for piping through combustible walls.
h.) Horizontal chimney cap.
C.) The exhaust piping must terminate outside at least 6 inches past the outer wall surface.
D.) Determine equivalent length of exhaust piping. Never exceed 20ft total equivalent pipe length. If altitude is over 2000ft,
do not exceed 15ft equivalent pipe length. If altitude is over 4000ft, do not exceed 12.5ft equivalent pipe length.
Component
Equivalent Length
Horizontal Straight Pipe
Vertical Straight Pipe
90° Bend or Tee
90° Bend or Tee
45° Bend
# of feet
# of feet
# of bends
# of tees
# of bends
X
X
X
X
X
1.0
0.5
5
5
3
=
=
=
=
=
Sample
Horizontal Straight Pipe: 1 ft x 1 = 1
Vertical Straight Pipe: 4 ft x .5 = 2
90° Bends: 1 x 5 = 5
Tees: 1 x 5 = 5
45° Bends: 1 x 3 = 3
Total Length = 1 + 2 + 5 + 5 + 3 = 16 ft
3" MIN
6" MIN
3" MIN
6" MIN
WALL THIMBLE
HORIZONTAL
CHIMNEY CAP
90° ELBOW
90° ELBOW
WALL SUPPORT
1FT STRAIGHT
SECTION (4X)
1FT STRAIGHT
SECTION (5X)
WALL THIMBLE
WALL SUPPORT
PIPE ADAPTER
PIPE ADAPTER
TEE
TEE
CLEANOUT
CLEANOUT
FIG00978
*Complete vent kit item #36624 available through NorthStar Customer service 1-800-270-0810 includes
all parts shown on the left side of the installation diagram above (fig00978).
5
4.) Fresh Air Intake Pipe
Attention! Before cutting holes in your wall, make sure the stove is placed where you want it and check for electrical wires and
plumbing pipes. Always check dimensions of stove and intake pipe before cutting hole in wall. Cut holes between studs.
Use a stud finder to check for studs. Use a long 1/4 drill bit to drill a center point through both walls. Use this center
point to make sure the inside and outside wall holes line up.
Caution! Your stove must be installed with a fresh air intake pipe used for combustion. The fresh air intake pipe makes your
stove more efficient and safe.
A.) Use standard 3” galvanized steel pipe, 30 gage minimum thickness. Do not use PVC or aluminum pipe.
B.) Connect to stove and secure with clamp.
C.) A wall thimble is not required.
D.) Intake pipe must terminate outdoors with 90 degree elbow pointing down at least 6” above ground.
E.) Intake pipe must terminate below exhaust pipe and at least 12” from exhaust pipe to make sure exhaust doesn’t enter
freash air intake pipe.
90° ELBOW
POINTING DOWN
3" STEEL PIPE
30GAGE WALL THICKNESS
DO NOT USE PVC OR ALUMINUM
3" STEEL PIPE
30GAGE WALL THICKNESS
DO NOT USE PVC OR ALUMINUM
90° EBLOW
POINTING DOWN
FIG00979
Additional Requirements for Mobile Home Installations
This stove is approved for use in mobile homes. However, the following guidelines must be followed in addition to all other
instructions contained in this manual.
1.) Do not install in a sleeping room.
2.) The stove must be bolted to the mobile home’s floor.
3.) The stove must be permanently grounded to the mobile home’s steel frame.
4.) The exhaust piping must have a spark arrestor.
5.) The structural integrity of the mobile home floor, wall, and ceiling/roof must be maintained. Consult local building codes.
6.) The installation should be in compliance with the Manufactured Home and Safety Standard (HUD), CFR 3280, Part 24.
6
Operating Instructions:
Buying Corn: Use clean shelled feed corn with 14% or less moisture content only. Buy corn in bulk or bagged from feed stores,
elevators or direct from a farmer. Corn with 11-12% moisture content works best.
For cleanest burn, mix 1 to 2 handfuls of oyster shells (available at feed stores) with each hopperful of corn.
Starting:
1.) Fill hopper with corn.
2.) Set damper to first notch.
3.) Rotate Heat Setting to #1.
4.) Place Mode Selector to Start.
5.) Place crumbled fire starter blocks in corn pot, light with match and close the door.
6.) Use Feed Control to manually prime the corn into the fire pot.
7.) When the Corn Stove warms up, the room blower and automatic corn feed will start. After this point place Mode
Selector switch to Run.
8.) Rotate Heat Setting to desired setting.
9.) Adjust damper to achieve cleanest burn, (usually between the 4th & 5th notch).
Heat Selector
Scrapper Rod
Feed Control
Mode Selector
Fire Starter
blocks
Damper first notch.
(closed damper)
Damper last notch.
(open damper)
fig01041
Stopping:
1.) Rotate Heat Setting to OFF position.
CAUTION! Never use gasoline, gasoline-type lantern fuel, kerosene, charcoal lighter fluid, or
similar liquids to start or “freshen up” a fire in this heater. Keep all such liquids
away from the heater while it is in use.
7
Maintenance Instructions
CAUTION! Unplug the Corn Stove before servicing. Wear heat protective gloves whenever
servicing a hot stove.
Oil blower motors annually. 5-10 drops SAE 20 non-detergent oil.
Room Blower
oil hole
Non-Detergent
oil
fig01042
Exhaust Blower
oil holes
Clean fire chamber weekly.
Your corn stove should be shut down and cleaned out weekly. Pull the scraper rod in and out to clean the heat exchanger pipes. Pull
out the closures located just above the ash drawer and push ash down into the ash drawer. Remove the fire pot and make sure all holes
are clear. Clean the tumbler.
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 noncombustible 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.
Check/Clean exhaust piping weekly.
Soot and Fly Ash: Formation and Need for Removal - The products of combustion will contain small particles of fly ash. The fly ash
will collect in the exhaust venting system and restrict the flow of the flue gases. Incomplete combustion, such as occurs during
startup, shutdown, or incorrect operation of the room heater will lead to some soot formation which will collect in the exhaust venting
system. The exhaust venting system should be inspected at least once every week to determine if cleaning is necessary.
8
Troubleshooting Guide
Start Up - Hard to Light
Cause
Too much air blows flame out
Fire pot is full of partially burned corn
Trying to start with corn alone
Stove set to RUN mode during start-up
Solution
Set damper to first notch for start-up.
The fire pot should never be more than 1/2 full of corn.
Remove and clean fire pot. Clean out fire pot holes and tumbler.
Use primer button to meter small amounts of corn into fire pot
during start-up.
Use starter bricks or wood pellets to warm stove up. Starting
stove with corn alone can be done. But, it is more difficult.
Change mode selector switch to START mode.
This will allow the exhaust blower to operate while the machine
is cool. Change to RUN mode after the machine warms up.
Fire Goes Out and/or Smoky Exhaust
Cause
Solution
Not enough air for combustion
Pull damper out until flame starts to be active. Generally, the
higher the heat setting, the further the damper needs to be pulled
out.
The flame should be blue at the bottom and yellow at the top.
Low air flow is helpful for start-up, but the flame burns dirty and
eventually goes out.
Too much air blows flame out
Push damper in until flame is lazy. Then, pull damper outward
until flame starts to be active. The flame should be blue at the
bottom and yellow at the top.
Fire pot requires cleaning
Remove and clean fire pot. Clean out fire pot holes and tumbler.
Fire chamber requires cleaning
Try adding 1-2 handfuls of oyster shells to each hopperful of
Drawer is full of ash
corn. This will reduce the buildup of unburned starch that
collects on the tumbler and in the fire pot.
Pull scraper rod to clean heat exchanger tubes.
Clean side walls of fire chamber.
Pull out ash closures and push ash through holes down into
drawer. Empty ash drawer.
Corn too moist
Use corn with 11-12% moisture content. Your corn supplier
should be able to furnish this information.
Exhaust piping plugged
Clean exhaust pipe. Make sure exhaust outlet is not blocked.
Inlet piping plugged or inlet air contaminated
Make sure inlet piping is not blocked by leaves, snow, etc.
Make sure inlet back draft preventer swings freely.
Make sure inlet piping does not draw fumes from exhaust piping.
Exhaust blower not functioning
Unplug stove. Check wiring. Remove exhaust blower and clean
out.
Room Blower not functioning
If the room blower is not functioning, the stove will overheat and
the high temperature limit switch will shut down the machine by
disabling the auger that feeds corn.
The room blower is disabled by a low temp switch. Therefore,
the room blower will not function when the stove is cool. It is
designed to only operate after the stove warms up.
If the room blower is not functioning after the stove warms up,
first check the low temperature switch. See electrical diagram. If
the low temperature switch seems to be functioning, check the
wiring to the blower. Lastly, the room blower would need to be
replaced.
9
Troubleshooting Guide
Smoke Inside House
Cause
Solution
Inside of heat exchanger coated with rust inhibitor
Smoke will disappear within 3 hours.
Stove set to RUN mode during start-up
Change mode selector switch to START mode.
This will allow the exhaust blower to operate while the machine
is cool. Change to RUN mode after the machine warms up.
Leak downstream of combustion fan in the exhaust piping
Seal any leaks with high temperature RTV sealant.
Exhaust piping plugged
Clean exhaust pipe. Make sure exhaust outlet is not blocked.
Exhaust blower not functioning
Unplug stove. Check wiring. Remove exhaust blower and clean
out.
Door open or not sealed
Make sure door gasket seals against fire chamber.
Adjust handle out by spinning counter-clockwise for tighter seal.
Replace gasket if necessary.
Blowers/Motors Run after Stove Cools Down
Cause
Stove set to START mode
Room too warm
Low Temperature Switch malfunction
Solution
Change mode selector switch to RUN mode.
This will engage the temp switch that turns the exhaust blower
and the tumbler motor off.
If the room in which the stove is installed reaches 95F or higher,
the low temperature switches will close and the motors will start.
Also, the room needs to be cooled down to 80F before the low
temperature switches will reset to the open position.
If your room never gets below 80F, unplug the stove when not in
use to increase the life of the motors.
The low temperature switches are designed to make start-up
easier and to make the stove automatically shut off when it runs
out of fuel. There are three low temperature switches.
The first disables the auger.
The second disables the room blower.
The third disables everything (only if placed in RUN mode)
If any of these switches were to fail closed, the motors would run
as soon as the stove is plugged in.
Auger does not turn
Cause
Auger moved out of drive slot during shipping
Solution
Push while turning auger, end of auger should be flush with
discharge tube.
10
173780F Parts Breakdown
Structural Components
10
9
8
7
4
11
3
12
2
5
1
6
13
14
7
30
29
28
27
26
25
15
24
16
23
22
17
21
20
18
19
fig01023
REF
1
2
3
4
5
6
7
8
9
10
11
12
13
PART #
36489
36380
36302
36271
36597
36599
36600
36247
36280
37899
36607
36309
36310
DESCRIPTION
Glass Retainer
Glass, Ceramic
Fiberglass Rope, 5/8”
Door
Handle
Spring
Corner Trim
Left Side Panel
Control Box
#50 Sash Chain
Lid
Back Panel
Hinge
QTY
1
1
128”
1
1
1
2
1
1
14”
1
1
3
REF
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
PART #
36248
36359
36446
36353
36256
36323
36212
35227
36445
36424
36368
36337
36484
36490
36220
36444
35227
DESCRIPTION
Right Side Panel
Hopper
Fire Chamber Insulation
Combustion Chamber
Scraper
Pedestal
Drawer
Sticker Tight Gasket
Long Closure
Door Latch
Front Panel
Rod
Top Trim Square, gold
Front Panel Insulation
Ceramic Brick Panel
Short Closure
Sticker Tight Gasket
QTY
1
1
1
1
1
1
1
44”
2
1
1
1
1
2
1
2
107”
Not used on
the 173780F
11
173780F Parts Breakdown
Motors, Blowers, and Drive Components
42
43
41
44
45
46
47
55
48
49
65
54
50
53
51
PART #
82164
36194
36071
36491
36443
36083
36471
36092
36472
36473
36423
36425
DESCRIPTION
Auger Set Screw
Auger
Auger Coupler
Auger Gasket
Auger Gasket Plate
Auger Motor, 4rpm
Tumbler Motor, 1rpm
Sprocket, 10T, 3/8” bore
Chain
Sprocket, 10T, 1/2” bore
Tumbler Drive Shaft
Tumbler Coupler
fig01025
QTY
1
1
1
1
1
1
1
1
1
1
1
1
MODEL
all
all
all
all
all
all
all
all
all
all
all
all
REF
53
54
55
56
57
58
59
60
61
62
63
64
65
64
58
57
52
REF
41
42
43
44
45
46
47
48
49
50
51
52
56
PART #
36454
36198
36202
36660
36435
36090
36659
36434
37049
36593
36433
36362
36363
59
61
60
62
DESCRIPTION
Tumbler Collar
Tumbler
Fire Pot
Room Blower
Room Blower Gasket
Exhaust Tube
Exhaust Blower
Exhaust Blower Gasket
Exhaust Manifold
Exhaust Manifold Gasket
Damper
Spacer Plate
Backing Plate
63
QTY
1
1
1
1
1
1
1
1
1
1
1
1
1
MODEL
all
all
all
all
all
all
all
all
all
all
all
all
all
12
173780F Parts Breakdown
Electrical Components
B
AFFIX WIRES TO DOOR
WITH ONE CABLE TIE
BASE AND ZIP-TIE.
RING BETWEEN
TWO 1/4-20
FLANGE NUTS
A
SIDE VIEW
ZIP-TIE EXHAUST BLOWER
WIRES AND POWER CORD
TO WIRE HARNESS.
71
72
ORANGE WIRES
TO HIGH TEMP
SWITCH
ORANGE AND WHITE
WIRES TO AUGER MOTOR
75
74
PURPLE AND WHITE WIRES
TO ROOM BLOWER MOTOR
RED AND WHITE WIRES
TO TUMBLER MOTOR
REF
PART #
71
72
73
74
75
36306
777252
35790
35408
36272
DESCRIPTION
Strain Relief
Power Cord
Wire Harness
Red/Yellow Wire Nut
High Temp Limit Switch
QTY
MODEL
1
1
1
1
1
all
all
all
all
all
13
173780F Parts Breakdown
Electrical Components (Continued)
4
5
6
7
3
8
2
1
9
Off
10
Heat Setting
Start
Run
Mode
Selector
Prime
Auto
Feed
Control
REF
PART #
DESCRIPTION
90
91
92
93
94
95
96
97
98
36273
31117
35769
36483
33793
35948
36486
35408
36658
Low Temp Switch
Control Knob
Control Panel
Mode Selector Switch
Primer Button
Timer
Standoff
Red/Yellow Wire Nut
Fuse
QTY
MODEL
3
1
1
1
1
1
4
5
1
all
all
all
all
all
all
all
all
all
14
15
Thermostat Installation
A wall thermostat can be used to control the temperature in a room. The thermostat will cycle the fuel from the heat
setting down to a pilot level (four settings lower) once the room reaches the desired temperature.
Wall Thermostat
Timer
Brown Wire
Brown Wire
1. Follow the thermostat manufacturer’s instructions carefully. Thermostats can be purchased locally from hardware
stores and home improvement stores.
2. There are two brown wires on the corn stove timer. Connect the two wires from the thermostat to these two brown wires
with wire nuts as shown in the diagram above.
3. Make sure the wires are routed away from hot surfaces.
4. When disconnecting a thermostat, connect the two brown wires back together with a wire nut. If this is not done, then
the stove will continually run four settings lower than desired.
16
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