Earth Stove Natural FIRE MP250 User manual

PE L L E T STOVES
INSTAT.T ATION
AND OPE1LATION MANUAi.
MODEL MP250
This equipment must be installed by aQualified Technician.
Read thorougly before starting installation.
Save this manual for future reference.

_a_aT
IMPORTANT SAFETY NOTICE : 7
PLEASE READ BEFORE ATFEMF17NG TO BURN:
follow the installation directions; contact local buil4ing officials about restrictions and
installation inspection requirements in your area,
1. Installation of th_s stove must comply :9.
with local codes. A building or
installation permit may be required.
Be sure to check with your local
building or fire department before
installing.
2.
o
o
.
o
.
8.
I0.
Have your fireplace and ,chimney ........
system inspected by a qualified person 11.
prior to installation of the stove. .....
Make any necessmy repairs before
instail .',', ........ 12.
Never connect stove flue to chimney
being presently used by another"
heater. ..,
To provide reasonable fire .safety,.
install a smoke detector and a
conveniently located fire extl.n_dsher.
In the event of a chimney _notify
the fire departmen t and unplug the
stove and close all openings.
Terminate pellet vent pipe so that _"
contact with humans or ,.pesS_l%
dnmage tO pipe is avoided.
Required fuel is: 'I/4" diameter
pellets, 8500 BTU per pound, 10%
maximum moisture content_ 1%=3%
ash. Corn kernels, 10,000 BTU per
.............. pound,
Never block any air intake or air.
outlet ports. Dangerous overheating
can resulL
Do not install this stove in a sleeping
1"oo111-
Never connect the stove to an air duct
_j_tern
Never stack or pile combustible
materials against the stove or around
external vent tcrmlnation.
To avoid burns, children and adults
should be alerted to the baTards of
high surface temperatures.
15% maximum -..moisture
content (OptionalCornpot V_l_)
Testing/l .isting
This stove has been tested and listed for use
in residential construction/11 accordance with
applicable UL standards, and for
manufactured housing in ao:ora_nce with
OAR 814-23-900 through 814-23-909, by
Pacific Inspection and Research l.aboratoty,
Inc., (PIRL) Redmond, WA 98052.
Based on atested air to fuel ratio in _cess
of 35:1, this appliance is not an effected
facility under the EPA regulatiens for
-¢_xxiburning stoves.

I
2Itracd_
INTRODUCTION
Read Entire Manual Before Attempting to Burn
OVERVIEW
Gold Door
Your Earth Stove's Gold Door Frame should
be cleaned thoroughly with a good window
cleaning solution and a soft cloth BEFORE
the stove is burned. Do not use any metal
polishes or abras'rees to clean the door. Any
oiLs or fingerprints left on the Gold eodd
become permanent blemishe_ if the stove is
burned prior to their removal After the first
few fires the Gold will cure.
Glass
The Glass is a super heat mfistant ceramic
that withstands continuous temporatur_ up to •
1390" F. This temperature is well beyond the
temperatures in which you oporate.your, smve._ ..... .
After long periods of pilot operation some
soo t may form on the Glass.
Ash Drawer
The Ash Drawer located in the fi'ont of the
pedestal is designed to make cleaning easier
by eontalnlng the ashes in a removable
drawer. It is accessed by turning the spring
loaded screws located on the Ash Drawer
Cover. Do not operate the stove with the
Ash Drawer open or ajar. Replace gasket
material as necessary to insure a tight seaL
Decorative Logs
An important feature of your NaturalFtre
stove is the realistic fire created by the flame
spread F'trepot and the refractory logs.
Although the logs are quite durable, they
should be handed earefuUy, as they retain
heat for a considerable period of lime, and if
dropped can break. -
Placement of the logs is important in
achieving arealistic fire. One recommended
pattern is pictured below which allows you to
use aF'_-l_Ot cleaner without having to
remove the logs (except for full m_;ntenance).

I_ueffon 3
OVERVIEW
Marble
Marble is a natural product so each piece will
have its own unique character. 'Marble may
be cleaned with a damp cloth to remove oils
or dust.. Be sure to install the four eerawool
strips (under the marble) to protect it. Do
riot put rough objects (such as trivets/steamers
/hopper lids) on the surface. Do not install
the Marble before curing the paint.
Control Panel/Fan Rheostat
The p_mary Control Board (Model 1000)
manages the performance of your stove. It
allows you to regulate the fuel feed rate, the
Draft Fan pilot and main power to the stove.
The Room Air Fan Rlaeo_tat allows you to
manually regulate the fan speed except when
the automatic high speed override is engaged.
Three Pronged Plug (Grounded)
Your stove has a printed circuit board and
other electrical components that require, a
grounded circuit and proper polarity.
Purchasing a surge protector provides
additional insurance against tmn_
problems.
Firepot
The pellet Firepet is where the fuel is
burned. Although it has aself cleaning
capability for much of the ash build up,
variable fuel quality (ash content) and
extended periods of a low burn rate will
necensitate some manual cleaning. An Earth
Stove F'trepet cleaning tool is highly
recommended (part #11300).
Hopper
The Hopper is where the fuel is stored before
it feeds into the stove..
How It Works
The Fuel Metering Cup rotates in the throat
of the Hopper providing am_ amount
of fuel based on the set Feed Rate. The fuel
drops into the Auger Tube where it is moved
into the Firepot. The Draft Fan provides
combustion air through the Auger Tube and
a series of holes in the iimer F'trepot, to allow
for complete combustion.
The flame and hot gases provide heat to the
Heat Exchange Tube, located in the upper
chamber of the stove. The Room Air Fan(s)
extracts the heat and delivers it to the room,
along with the natural radiant heat fzom the
glass and metal surfaces.

i
_ol_raam
OPERATION
Before Attempting To Start Your Stove, Read This Manual Thoroughly.
Have Your Stove Pretested and Professionally Installed.
Start Up Procedure
.
2.
.
Plug in the stove. Fill hopper with pellet.
fuel
Turn the Main Power Switch to the "F_,_M_
System" position
Provide starting fuel by pushing the "Start
Button" and allow fuel to feed for
approximately five minutes (or put
appro'Amately two cups of fuel dkectly in
the F'trepet).
4. Turn the Main Power Switch to the
"Stove Oit _ position. (This will stop the
fuel
5. Open fire door and apply F'we Starter gel
to the fuel in, the Firepot,then light..
Allow the fuel to bum for five mlnute_
with the door slightly ajar.
o
7.
8_
Close the door.
Turn the Main Power Switch to the "F_,_I
System" pusition,:then push the Start
Button.
Set the Fuel Rate Switch to the "Full"
position. If using a remote Thermostat,
adjust it to the desired .room temperature.
.As the stove temperature rises, the Room
Air Fan(s) will automatically engage.. At
that point, adjust the Fuel Rate Switch to
the desired setting. During the start up
procedure or when running the stove on
a "Low" Fuel Rate Setting, the Room Air
Fan Rhe_tat most be in the off position.
Failure to do so could cool down the
stove and it will automatically shut off.
10. If the fire goes out, go back to step two
again_
Shut Down Procedure
"1. Turn the Main Power Switch tO the _Draft
Fan" position. If using aremote
Thermostat, turn the Thermostat down.
2. When the fire in the Firepot goes out
completely, shut the Main Power Switch
to the "Stove Off' position.

_5
OPERATION
Control Board Model 1000
A. Main Power Switch
The Main Power Switch is a three way
toggle with the following positions:
1. Stove Off
2. Draft Fan - allows the Draft
Fan to operate alone during .
shut down.
3. Feed System - Stove On
B. Fuel Rate Switch
The Fuel Rate Switch controls the
amount of time the burner feeds fueL
It can be set to the following three
positions:
1. Full - will feed fuel
continuously.
2. Medium will feed fuel
approximately,two minutes on.
then two minut_ Off.
3. LOW - wlTll feed applu=[mamly
one minute on then three
mlnut(_ Off,
C. Draft Fan Switch
The Draft Fan Switch controls the
amount of air used for combustion
and aids in the draft of the stove. It
can be set to the following three
positions:
1. High - r_,-_ at 75% of capacity
when stove is not feeding fueL
2. Low - runs at 50% of capacity
when stove is not feeding fueL
3. Off - rum at 0% of capacity
when stove is not feeding fueL
NOTE: The Draft Fan will run
at 100% of capacity during the
feeding of fuel after the stove has
reached normal operating
temperatures.
D. Start Button
Depre_ the Start Button to allow fuel
to feed for appromaately 12 minutes
(used during the start up of the
stove).
E. On/Off Light
The On/Off Light bHnL_ to indicate
electricity is flowing through the
Primary Control Board.
EF_
The Fuse protects the Primary
Control Board from power "surges or
spikes".
(3. Room Air Fan Rheostat
The Room Air Fan Rheostat can be
•used to vary the speed of the Room
Air Fan by r0tat/ng it to the desired
setting. When the stove is very hot,
the Rheostat override (Fan Speed
Disc) vdll automatically run the fan on
high until the stove cools.

¢
a Ot,era_m
OPERATION
Normal Operating Sounds
Heat Exchange Tubes - As the Room Air
Fan(s) increase in speed, you may hear air
being forced through these tubes and out into
the room.
Thermostatic Control Disc, There are four
different heat activated temperature discs on
the stove. The discs can make a light clicking
sound as the stove heats up or cools down.
Room Air Fan(s) The modern, high
efficiency fan may have a hum or pulsating
sound, particularly on the hlsh setting. The
sound may change as the fan speed is varied.
Auger Feed System - When fuel is fed from
the Hopper to the Auger Tube, a light
clinking sound or the fuel being .cut may be
heard.
Auger/Cap Motor(s) - When feeding fuel, you
may ,hear the intermittent buzz or hum of
these motors.
Draft Fan - This motor runs at various speeds
to provide combustion air to the F'trepot (and
to aid in the draft of the flue). The speed of
this motor will increase with the feeding of
fueL
Optional Remote Thermostat
One way to ma,x,lmiT_, the efficiency and
convenience of your stove is to install a
remote Thermostat. A Honeywell Tg7F 24
volt Thermostat is recommended..
Follow the manufacturer's installation
iustruetions using 18/2 stat wire. The leads
from the stove are the yellow wires found
behind the Primary Control Board.
Once you have installed the Thermostat, the
Fuel Rate Switch should be set to "Low'. This
will be the rate the stove will pilot at when
the Thermostat is not calling for heat.

Product Bulletin
ii ii i i r r ] ul iiiii i i ii i illl illl ii ill 1ill ii i i i i i ii ii ,,,, ,,,,,, ,,,, ,
• . . ._.._ _::._.. •_: . . .. ...:.:..o:_.__:.:.._:_ ......
.... _o._. _ _.. .:., _,_ ...........:_, _.
.... _:. _ _ N _::_ _N:'_:. ._:N_!_:_:_.
INSTALLATION OF P/N15169C CORNPOT INTO MODELS MP35/50 &
MP250.
The cornpot (p/n15169C) will not fit into models MP35/50 and MP250 without
• removing the ash skirt. The ash skirt is a nonfunctional part and is not necessary
for burning corn. If you wish a replacement ash skirt ( for model MP35/50 only)
with steeper side angles which will allow fit of this cornpot, contact your regional
Warranty & Technical Support Department.
REMOVAL OF ASH SKIRT:
•This part is secured in place with silicone and is easily removed by grabbing the
back corners and pulling up until the silicone breaks loose. To break the seal on
the front lip of the ash skirt it may be necessary to pry upward with a screwdriver:
ASH SKIP, T -
TOP VIEW

Opm-at/oo 7
BURNING. CORN (Optional)
Natural Fire pellet stoves will bum most types
of tom with the addition of a Corn Pot kit.
It is not ne_zsat 7 to mix corn with wood
pellets however, wood pellets are required to
start the tim. NOTE:, Burning treated seed
corn is never retommended. :,
The Corn Pot kit consists of.:
1 1/8" Filler Plug
13/8" F'_er Plug
1 Corn Pot
To install the Corn Pot, simply remove the
screw(s) from the top of the Auger Homing
and lift up and out on the Firepot. Slide
mounting t3an_e of the Corn Pot over the
Auger Housing and replace screw(s).
Initially the Air Shutter on the Draft Fan
should be set at 1/2 open and the Draft Fan
selector on "LOW'. If more or less
combkstion air is needed, adjmt the Air
Shutter accordingly to achieve a bright yellow
flame.'
Because corn size and density varies, it will be
necessary to cah'brate the Fuel Metering Cup
in order to maintain rated BTU input and
prevent ovetfiring. This requires the
imtallation of the Filler Plug in the Fuel
Metering Cap. _Use the 3/8" filler plug
provided in the Cornpot kit..
The moisture content of the corn should be
15% or less, and care should be taken to
ensure that there are no foreign objects in
the corn (i.e. stock st_J_, cob parts,etc.).
When burning torn, the primary combustion
takes place on a bed at the bottom of the
Corn Pot. The Corn Pot has a solid bottom
and sides with air holes because burning corn
forms a fluld-ll'ke residue which becomes solid,
when cooL The Corn Pot cleaning will
depend upon the qua!ity and quantity.of.corn
being used. The Compot should be cleaned
when the build up starts to reach the bottom
air holes inside of the Cornpot. You vftl
need to remove the ash, and in some
instances a white calcium like deposit. The
stove must be shut down and cooled before
cleaning.
Corn burning should be done in top vent
installations only. If the installation must
elbow into a wall thimble, the horizontal run
should not be more than 24". The use of a
wall mounted Thermostat, part #Ci'K140 is
suggested.
Start Up Procedure
We recommend staring acorn fire with wood
pellets because corn h_._ a dense shell that
can be difficult to start. Manually fill the
Compot, to the bottom of the Auger Tube,
with wood pellets..Use of the Start Button
feature is not recommended when initially
starting the unit for corn burning." (See "Start
Up Procedure" in the Operation section for
additioaal start up information)

. .
... • [
8M.a/m
• •• :•+=:•••;•• (::i :"•:i .... •
MAINTENANCE
Ash Removal and Disposal
CAUTION: BE SURE THE PIRE IS OUT
AND STOVE IS COLD BEFORE
REMOVING ASHF_S! NEVER BURN
YOUR STOVE W[n-I TIIE ASH
DRAWER OPEN.
Ashes can hold live embers for several days,
and must be disposed of with care. Be
cert,l, the fire is out before you remove the
Ash Drawer. Brush .ashes into the Ash
D_awer. After emptying, clean and replace
the Ash Drawer and tighten the spring loaded
screv_. _ place ashes in a cardboa_rd
box or any other combustible receptad_
Place the ashes in a metal container with a
tight fitting metal lid. The dosed container
should be stored on a noncombustible surface,
away from combustible mate_4at__ Keep the
ashes in the closed container until you are
certain all the cinders have complemly cooled.
Replace Ash Drawer Gasket if it becomes
dama_a_gd. • •
Door +Gasket
A spun fiberglass gasket (3/4" in diameter)
provides the seal around the fuel door.
Should this become flayed or d,ma_ it
should be replaced. Spun tiberOass "rope"
gasketing can be purehused from your dealer
or some hardware stores. It must be the
same diameter as the ori_nal_ Use high
temperature (RTV) silicone sealer as _an
adhesive.
WARNING:. MAINTAIN THE DOOR
SEAL IN GOOD CONDITION: DO NOT
T+I_.AkVE _STOVE BURNING WITH
THE DOOR OPEN OR AJAR. DO NOT
USE ANY TYPE OF ABRASIVE
CLFANER OR POLISH ON GOLD
PLATING.
Creosote Fotmation and Need for
Removal
If your stove is properly adjmted, very little
creosote will develop in your flue s_tem. If
creosote begim to develop, it is _ that
poor adjustment orneeded maintt_-nance is
causing incomplete combustion of,the fueL
Be sure your Draft Fan Switc_ and Draft
Fan shutter are set properly.
Soft fly ash is anormal by product of burning
pellet fuel, and can accumulate in your flue
system. Using lower grade fuel will increase
the frequency of cleaning that will be needed.
Check your flue regularly (at least once a
month) until a schedule can be established for
your installation and fuel quality.
Remember, during high use periods to
increase your inspection cycle.
paint
Your stove n.t, lt is,a hi# temp paint that
requires time and temlxaature to completely
cure. Depending on your me, this may take
a few hours or a few days. Do not attempt
to repaint the stove unu3 the paint is
completely cured. Do not place anything on
the stove surface until the stove h_ gone
through several heat up/cool down cycles, as
the paint will become soft before it cures.
Fan(s)
At least once each year, check the Room Air
and Draft Fans inlets fDr depmits f_om
carpeting, pet hair, furniture covering% etc.
Use a brush and/or light vacu.m_ for
cleanin_ Offing the fans is not necessary.

). •• . .• %:: :.._ , ._,:_. ,-, _ _'• _:_: g.,_". ..: .,,. .,l' ..• . •,_.. . . . . ,,..• •
..... J-,,• • .
MAINTENANCE
Firepot
Keep the Hrepot inner holes free of
• obstructions (buildup). Pull the Ftrepot and
empty it when this _The q, mlity and
quantity of pellets used will dictate the
IleCt_ry de_nin_. Remove clinkers or
carbon build up.
Clinkers are abyproduct of the fueL Silica
(or dirt) in the fue_ along with other
impurities can fuse under heat and cause
clinkering. Clinkering is afunction of the
fuel not the stove. A cl;.k_ should be
removed using aclean out tool
Refractory Logs
The fallowing steps will insure the. longevity
of your logs:
°Never attempt to hAncll_ them
they are hoL
2. Use a"Natural FETe" Flrepot cleaner
tool (Part #1000) to remove ashes
fxom the Fn'epoL In many cases you
can do thk without removing any logs.
F.x_pt when cleanln_ out the bottom
of the stove, do not remove the large
1/4 Lo_
Cleaning the MP250
.Turn the unit off two to three houri
before cleaning to allow the unit to
cool (see Shut Down procedure).
?_ Place protective floor covering around
the f_ont of the stove.
.CAREFULLY remove the decorative logs
fi'om the Fhebox and set them aside.
Remove the Baffle Plate.
.Remove the F'n'epot by removing strew(s)
from the auger housing and pulling up and
out. Back out bolt on Clean Out At_e_
Plate and remove.
.Remove Ash Drawer and empty x_hes into
your nonoambmtible container. _of
ashes _ previnusly descn'bed (see ash
removal and disposal). Clean any
remnining ash from the Fn'ebox and Ash
Drawer area.
6. After the stove chimney has been swept,
the top/rear chimney seal off plate needs
to be pulled off of the stove to vacuum
the unit out.
There is a upper Baffle Plate (see page
10) between, the top of the Heat
Vxchange Tubes and the top of the stove.
Fly ash will ac_'mnulate on this plate and
•must be removed or your flue will become
clogged- You should also remove the dust
and fly ash which accumulates on the
Heat Exchange Tubes.
7. Vacuum the Clean Out Aer_
&Reinstall your Fmepot being sure that the
.Auger Tube pmtmd_ about 1/8" into the
F_epot. Replace baffle and dean out
access. Reseal and secure stove chimney.
The necessary fi-equency of thi_ pxxx:edure
will be dictated by the quality and q,,_*nqty of
the fuel burned.

i;.: : :i!_i_i)'_.ili_:¸_il ';, -
, .. , ,_ . : ... •
•-,lOA_n_na_e .... _ ,_,.- .. :-=_,, ,,,,, ,,:: ,_ _..--=
.Clean Out Access
Ash Drawer 1°•l
0
lI

-.:_-". ..... _ ,-7-' _ _" _'_;" _- -_, .,i_"_t'_ ",_' "_ -" '. '"
Mahl_aance 11
MAINTENANCE
Maintenance Suggestions
As w/th all appliances, periodic maintenance is required to keep them operating at optimum
efficiency. We recommend an annual maintenance service by a q_,alified
Recommended Maintenance Points
A.
B°
Once for ever_ ton of fuel burned, use a
brush and remove all dust and fly ash
from Heat. Exchange Tubes and Baffle
areas.
Remove and clean the F'Lrepot. Keep
inner• air holes free fi'om buildup.
Remove ashes from the Firebox.
Clean chimney, cap and exhaust passage
way annually or as needed. Inspect
monthly.
D. Vacuum air intakes and squirrel cage on
Room Air Fan(s) annually°
E. Clean squirrel cage on Draft Fan annually.
F. If remote Thermostat is used, remove
cover and clean contacts annualS.
G. Replace Door Gasket.as needed.
H. Replace Ash Dia_er Door Gasket as
needed.
Maintenance Related Problems
Problem:: I:_-reas¢' in heat output or
incomplete combustion.
Solution: See maintenance points A, B, C,
D and E (above).
Problem:
Solution:
Decrease in Room, Air Fan(s)
velocity.
See maintenance point D(almw).
Problem:
Solution:
Stove smokes or odor in home.
See maintenanoe points A, B, C, G
and H (above).
Problem=
Solution" Flames appear tO burn la='ly.
See maintenance points A, B, C,
and E (above).
Problem: Noticeable chan m_ in Room Air
Fan(Onoise.
See =-;-*_---ce point D(above).
If solutions fail to cure problem, See Trouble
Shooting Section.
o

12/ns_//m_m
INSTAl ,1,ATION
Recommended Pre-lnstaUation Procedure
NOTE TO INSTAIJFR: Before the unit is
installed it is recommended that the unit be
pro-burned to verify the'operation, to burn
off oils that are sometimes found in the Heat
Exchange Tubes, and to eurcthe.painL. The
-Fre-Imtallation Procedure" should be done in
a well ventilated area as follows.
°Remove the Baffle Plate from the pallet
and place it on shelving inside the stove.
The shelving is located below the Heat
Exchange Tubes. Make certain the Baffle
plate is pushed all the way to the right
hand side of the unit and not centered.
2. Plug the stove into a grounded outlet.
(Using a circuit _ter,_@ the electrical
outlet for proper ground and polarity
where the unit will be installed. Failure
to do so could result in damage to the
electrical components and . void the
warranty.)
.Check the shutter on the Draft Fan and
make sure it is set at 1/2 open- (once
installed the actual setting will depend
upon the draft of the flue.) On the
Primmy Control Board, A) set the Main
Power Switch from "Stove Off= to the
"Draft Fan" position and B) put the Fuel
Feed Rate on "Full". The Draft Fan
should now start. Open the door, place
your hand over the Firepot and see if the
Draft Fan is foreiug air into the VmepoL
Turn the Main Power Switch to the
"Stove Off" position.
.Turn the Rheostat "On" to see if the
Room Air Fan(s) rua. After checking the
fan(s), turn the Rheostat "Off'.
.
6.
7.
8.
9.
10.
11.
l.x_ok down into the Hopper, and make
sure nothing is obstructing the Fuel
Metering Cup. Pour 1/4 bag of pellets in
the Hopper.
With the Main Power Switch in the "Feed
System" position, push the Start Button.
Allow fuel to feed for app_;mately five
minut_. Put the Main Power Switch in
the "Stove Off" position. Apply non-
volatilefighting material to the pellets
and fight it with a match. Let the fuel
burn for five minutes leaving the door
slightlyajar.
Close the door and set the Main Power
Switch to the "Feed System" position, and
the Fuel Rate Switch to the "Full"
position. Push the Start Button- The
Draft Fan will run at high and the flame
will increase (a full flame will need to be
establishedin the Fh'epet beLore.normul
operationcan be maintained.
Once running, observe the stove
operating for 15-30 minutes.
As the stove temperature rises, the Room
Air Fan(s) wRI automatically be engaged.
Set the Rheostat m the des'Lred speed.
If necessary, adjust the Draft Fan Shutter
m bring the fire to a bright yellow flame
(approximately 1/2 open).
Once the stove is operating properly,
complete filling the Hopper and run the
unit for 30 minutes.

CLEARANCES
The termination of the outside chimney of
the pellet stove shall be kr_ated in accordance
_th the following:
,Higher than 3 ft. above any forced air
inlet (air conditioner, eta) located within .
10 ft.
2. Not less than 4ft. below, 4 ft. horizontally
fi'om or 1 ft. above any gravity air inlet
(door, window, etc.).
.Not less than 2 ft. from an adjacent
building and not less than 7 ft. above
grade when located adjacent to the public
sidew_ll_ (a__c__s).
,!
Minimum Clearances.to . .
Combustibles
Side: 12"
Back- I"
Front- 48" horizontal f_3m door •
Single Wall pipe: 9"
Maximum horizontal run: 36"
Offsets allowed= 2
!
©12" _ 3
48"
1
Floor Protection
If placing units on a combustible surf-,-e,
floor protection is required in a residential
installation It is required for mobile homes.
It is not required although, that the floor
protection extend beyond the body of the
stove.

14 Irtn_ll_on
INSTAI3 .ATION
Venting Requirements
There are several options for the installation
and venting of your pellet stove. Refer to
clearance_ before installing your.stove.. .
Connect only one •flue per appliance. _When
vassing through-walls or ceilings, The
manufacturer recommends that elearancns are
maintained in accordance with NvPA 211.
Do not downsize your connecting pipe or
chimney.
Your NaturalF'tre pellet stove must be
connected to a 4" pipe. UL listed pellet vent
is a preferred type of pipe, or a single wall 26
gauge minimum. Follow the pipe
manufacturers installation instructions and
clearance. All pipe joints, must be sealed
with the compound supplied with the pipe or
a RTV silicone with a rating of at least
570 "F.
You may connect the single wall or pellet
vent to the top of the stove using three
screws to secure.it m the collar. Use a RTV
silicone with a rating of at least 570"F, or
inter'am to provide a complete seaL
Direct Vent
Although a direct vent flue is an approved
installation, the manufacturer does
recommend that to eliminate the possl'bility of
siding discoloration and/or to enhance
performance in bad draw situations, the
outside flue should be installed with a"T',
and Pellet Vent chimney pipe run up through
the cave. Terminate the pipe using the
standard clearance. Exception: if using a UL
listed Pellet Vent pipe you may use the Pellet
Vent manufacturer's clearances.
If burning corn, direct vent is not an
approved installation.
IMPORTANT_.! Never turn the Draft Fan
Selector to the "Ot_t_" position on am, direct
vent installations. Keep the Combustion Fan
Switch on the Primary Control Board in the
"Low" or High" position In the event of a
loss of power in arear vent direct term;nation
application, natural draft is not present and
you will experience smoking, but thin will
dissipate rapidly.
1. Remove the louvered panel to acc_,_s the
top vent outlet.
2. Place the cover plate (A) over this
opening. Make sure the gasket (B) is in
place and there is a complete seaL
Replace belts and tighten
3. Remove the rear vent cover flange located
on the back of the stove.
4. In its place, install the gasket (13) and
starting collar (C) making sure the gasket
center has been cut out to allow flue gas
to pass through the collar. Replace bolts
and tighten.
5. Attach section of pellet vent pipe (13).
Seal this connection with high temperature
silicone sealant. The horizontal run may
not exceed 36 inches.
A rear breach kit bavagahle through your
dealer, part number RBKSO. It consists of
the A) top vent cover plate, and C) 4"
starting collar.
A) Top Vent Cover Plate
B) Gasket Material
C) 4" Starting Collar
D) 4" - 24" section
E) 4" Wall Thimble
F) 4" Rain Cap

INSTAI IATION
Direct Vent
/
E)
g
I
A)
D)
Standard
Connection To A Masonry Chimney
Through A Wall
Be sure to verify the construction of a
masoniy chimney, as many have combustt'ble
fammln_ Follow the pipe manufacturer
clearances.
All ovenized chimney or high altitude may
result in less than optimum performance.
Installations into a large, masonry chimney
may require a liner to improve performance.
The use of single wall flex or rigid (26 gauge
gal_niTed or stainless steel) pipe as a liner is
approved.
Connection To An Existing Class A
Chimney
You may use a single wall or pellet vent pipe
from the stove top to chimney system. An
adaptor can be used to make the connection
from 4" pipe to existing UL chimney system.
Verify with the pipe manufacturer that your
pipe brands will interconnect. Installations
into a large UL chimney system may require
aliner to impr6ve performance. The use of
single wall flex or rigid (26 gauge gal_nD_!
or stainless steel) pipe as a liner through a
UL class "A" chimney is approved.
The most desirable installation is Pellet Vent
pipe connected to the top of the stove and
run up through the ceiling, then terminating
above the roof line. Be sure to follow all
clearances listed by the pipe manufacturer.

76 Ins_/,_on
INSTAl ,1.ATION
Mobile Home
Requirements
Installation
Installation of the MP250 in a mobile home
must follow the instructions for residential:
installation,with the followingsupplemental
requirements:
.No single wall pipe may be used. Pellet
Vent pipe must be used.fi'om stove top to
termination.
2. Offsets permitted: Ma.,6mum two offr, e_.
.The ehlmney must provide for a section
joint so that any parts extending above 13'
6" from ground level can be removed for
transportation of the mobile structure.
4- The stove must be grounded to the
mobile home trailer frame with a No. 8
(minimunl) solid conductor.
5. The combustion air must commlulicate to -
the outside air.
.Floor protection beneath the unit .is
required, but does not have to extend past .
the body of the stove.
.Structural members such as roof trusses or
floor joists cannot be cut or modified
while making the installation.
Outside Air Provision
Although this section appfies to amobile
home installation, it may also be required by
local- eodus in standard residential
iustallatiom. Use the manufaeterers optional
outside air kit (part #85-35) or equivalent.
t. Set the stove in its installed position and
select the floor or outside wall location for
the outside air penetration. The air
dueting must connect with the bottom of
the motor cabinet of your stove, using
rigid or flexible 3" duet.
2. Cut an Opening for the outside air kit
0'm #85-35).
3. Install the outside air kit.

I_on 17
INSTAl .TATION
Installation Applications
Direct Vent Termination
i •
Direct Vent Using A "1"

NOTES