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PP38+ Pellet Stove

3-90-08422R33_06/13

Fuel Specifications

Fuel and Fuel storage

Pellet  fuel  quality  can  fluctuate  from  manufacturer  to 

manufacturer, and even from bag to bag. 

Hearth & Home Technologies recommends using only fuel 

that is certified by the Pellet Fuels Institute (PFI).

Fuel Material

•  Made from sawdust and/or other wood by-products

•  Shelled field corn (when mixed with wood pellets)

•  Source material typically determines ash content

Higher Ash Content Material

•  Hardwoods with high mineral content

•  Bark and leaves as source material

•  "Standard" grade pellets, corn and other biomass

Lower Ash Content Material

•  Softwood; pine, fir, etc.

•  Materials with lower mineral content

•  "Premium" grade pellets

Shelled field corn

•  Must be 15% moisture content or less

•  Must be clean and free of debris

•  Must be mixed with wood pellets. (Up to 50%)

•  Stalk  parts,  excessive  fines  and  cob  remnants  may 

cause feed system jams or blockage

CAUTION! Do not burn fuel that contains an additive; 

(such as soybean oil) 

•  May cause hopper fire

•  Damage to product may result

Read  the  list  of  ingredients  on  the  packaging.  If  you  are 

buying field corn, the only ingredient listed should be field 

corn.

WARNING! Risk of Chemical Poisoning!

Do 

NOT

 burn treated seed corn

•  Chemical pesticides are harmful or fatal if swallowed

•  Burning treated seed corn will void the product warranty

Clinkers

Minerals  and  other  non-combustible  materials,  like  sand, 

will turn into a hard glass-like substance when heated. 

Trees from different areas will vary in mineral content. For 

this  reason,  some  fuels  will  produce  more  clinkers  than 

others.

Moisture

Always  burn  dry  fuel.  Burning  fuel  with  high  moisture 

content takes energy to dry and tends to cool the appliance 

thus, robbing heat from your home. Damp pellet fuel could 

turn back into sawdust which does not flow properly through 

the feed system.

Size

•  Pellets  are  either  1/4  inch  or  5/16  inch  (6-8mm)  in 

diameter

•  Length should be no more than 1-1/2 inches (38mm)

•  Pellet  length  can  vary  from  lot  to  lot  from  the  same 

manufacturer 

Performance

•  Higher ash content requires more frequent maintenance.

•  "Premium"  grade  pellets  will  produce  the  highest  heat 

output.

•  Burning  pellets  longer  than  1-1/2  inches  (38mm)  can 

cause inconsistent feeding and/or ignition.

We recommend that you buy fuel in multi-ton lots whenever 

possible.  However,  we  do  recommend  trying  different 

brands  prior  to  purchasing  multi-ton  lots,  to  ensure  your 

satisfaction.

CAUTION!

 Attempting to burn fuels such as charcoal has 

the  potential  of  generating  Carbon  Monoxide  which  is 

DEADLY. Never burn fuels other than those listed on the 

appliance safety label.

When changing from wood pellets to a corn/pellet mixture, 

the FEED ADJUSTER will likely need adjusted to a lower 

setting. When under maximum demand, ensure there is no 

unburned fuel being pushed into the ash pan.

Storage

•  Wood pellets should be left in their original sealed bag 

until ready to use, to prevent moisture.

•  Shelled corn should be stored in a tightly sealed container 

to prevent moisture and to deter pests

•  Do not store fuel within the specified clearance areas, or 

in a location that will interfere with routine cleaning and 

maintenance procedures.

caution

Tested and approved for use with wood pellets and a 

mixture of shelled field corn and wood pellets ONLY. 

Burning of any other fuel will void your warranty.

notice

Hearth & Home Technologies is not responsible for 

stove  performance  or  extra  maintenance  required 

as a result of using fuel with higher ash or mineral 

content.

Summary of Contents for P38plus

Page 1: ...ermine the need for a permit Cette guide d utilisation est disponible en francais Chez votre concessionnaire de Harman HOME HEATING Model s PP38 Freestanding Pellet Stove NOTICE SAVE THESE INSTRUCTION...

Page 2: ...de pr voir une prise d alr ext rieur L int grit structurale du plancher du plafond et des murs doit tre strictement pr serv e Se reporter aux instructions du fabricant et aux r glementations sp ci que...

Page 3: ...tre plac sous les parties horizontales du tuyau de raccord la chemin e et s tendre 51mm o 2 po au del de la mesure du tuyau Made in U S A of US and imported parts Fabriqu aux tats Unis d Am rique par...

Page 4: ...lified service person Periodic cleaning is required throughout the heating season and at the end of each winter for the stove to work efficiently refer to the maintenance section of this manual WARNIN...

Page 5: ...ions along with all local codes regarding installation of this appliance Do NOT use makeshift compromises when installing this appliance serious consequences may result With any hearth appliance insta...

Page 6: ...he first reading check for possible restrictions or the need for outside air see page 10 For more information on the draft test procedure refer to Page 19 Mobile Home Installation When installing this...

Page 7: ...mbly when measured from the horizontal center line of the regulator I The clearance to service regulator vent outlet must be a minimum of 6 feet J The clearance to a non mechanical air supply inlet to...

Page 8: ...an air tight seal in most cases However in some cases a perfect seal is not achieved For this reason and the fact that the unit operates with a positive vent pressure we specify that the joints also...

Page 9: ...s 15 feet If a longer run is needed the size must be increased to 3 Inlet cover part number 1 10 08542 should be used to keep birds rodents etc out of the pipe You may choose to use the optional Direc...

Page 10: ...n wall pass throughs 1 Preferred method This method provides excellent venting for normal operation and allows the stove to be installed closest to the wall Two inches from the wall is safe however fo...

Page 11: ...provides excellent venting for normal operation This method also provides natural draft in the event of a power failure If the chimney condition is questionable you may want to install a liner as in...

Page 12: ...out rain Be sure to use approved pellet vent pipe fittings Seal pipe joints with silicone or aluminum tape in addition to the sealing system used by the manufacturer Pipe size should be increased to...

Page 13: ...er installation clearances Minimum flue vent configuration It is required that outside air be installed with this venting configuration to reduce smoke and creosote smell in the room in the event of p...

Page 14: ...the stove temperature while in Stove Temp Mode using the inner scale marked from 1 to 7 Mode Selector Allows you to choose between Room Temp Mode Stove Temp Mode or OFF Also allows you to vary the dis...

Page 15: ...he stove will gradually slow down and hold at the minimum burn rate When the house cools down the stove will automatically bring the room temperature to the precise temperature you desire In the Room...

Page 16: ...er and smoke will escape through window and door gaskets Feed Adjuster Knob For most premium grade pellet fuels the Feed Adjuster Knob should be set at 4 If higher ash fuels are used the setting shoul...

Page 17: ...e burn pot When the stove is ignited these scrapings will be pushed out by the feeder and burned 6 The ash pan can hold the ashes from approximately 1 ton of premium fuel This means the ashes will onl...

Page 18: ...onds to pass for the combustion motor to slow before checking the low draft 6 If the low draft is between 25 and 35 record the reading _____ in W C If the reading is lower check for resistance in the...

Page 19: ...leaned Clean the glass with a soft cloth and mild glass cleaner Do not clean the glass when hot and avoid the use of abrasive cleaners Glass replacement Carefully remove all remaining glass and gasket...

Page 20: ...sed they should be retained in the closed container until all cinders have been thoroughly cooled Other waste shall not be placed in this container Cleaning It is recommended that the stove is cold an...

Page 21: ...THE STOVE LIVE PELLETS IF SUCKED INTO THE VACUUM WILL LIGHT THE VACUUM ON FIRE AND MAY ULTIMATELY CAUSE A HOUSE FIRE 9 Use a brush to clean the flue being careful not to damage the ESP probe see Fig 3...

Page 22: ...e of the burn pot Fig 34 3 Lift off the clean out cover Fig 35 to open the bottom clean out chamber Fig 36 4 Clean ash buildup from inside the chamber while cover is off Use the scraper to tap on the...

Page 23: ...in the firebox through a port on the rear of the feeder Poor draft will result in an interruption of power to the feeder motor Poor draft can be caused by blockage in the exhaust excessive build up o...

Page 24: ...tatus blink A 6 blink control board status indication is caused by poor or incomplete combustion The circuit board has the ability to track the combustion through feed settings and ESP temperatures Wh...

Page 25: ...6 13 Specifications 33 1 8 10 28 5 8 Weight 212 lbs Blower 135 cfm Feed Rate approximate 75lb to 5 5 lbs per hr Hopper Capacity 50 lbs Fuel Wood Pellets Flue Size 3 inch Outside Air Size 2 3 8 I D inc...

Page 26: ...ary to hold the slate in place on the stove There are 4 decorative slate choices See dealer for samples The Brushed Stainless deer cutout pictured below is another option available This cutout reveals...

Page 27: ...t temperature knob to desired amount Turn mode selector knob onto Room Temp mode After the fire has lit watch that the fuel does not feed too fast that it pushes the red glowing fuel bed off of the bu...

Page 28: ...content takes energy to dry and tends to cool the appliance thus robbing heat from your home Damp pellet fuel could turn back into sawdust which does not flow properly through the feed system Size Pel...

Page 29: ...1 4 2 3 6 5 9 8 7 WHITE WHITE WHITE WHITE BLUE EMPTY EMPTY PLUGGED BROWN 11 BLACK PART NO 3 90 773869 WHITE 11 PIN PLUG 10 RED GREEN BONDED TO STOVE BODY GREEN WIRE IS GROUND 1 8 3 R U B B E R C O R D...

Page 30: ...of new home construction warranty coverage begins on the date of first occupancy of the dwelling or six months after the sale of the product by an independent authorized HHT dealer distributor whiche...

Page 31: ...y does not cover the following Changes in surface finishes as a result of normal use As a heating appliance some changes in color of interior and exterior surface finishes may occur This is not a flaw...

Page 32: ...826 Y 2 Feeder Assembly Pre SN 008080066 Refer to following page 3 Feeder Assembly Post SN 008080066 Refer to following page 4 Flue Tail Pipe 3 00 247237 Y 5 Auger Motor Cover 2 00 773852P Y 6 Auger M...

Page 33: ...08080066 1 10 7738106A 16 Bolt on Hinge Weldment 2 00 06952B 17 Cast Door Frame 4 00 06800P Cast Door w Glass 1 10 06800A 18 Glass Panel 3 40 950133125 Y Glass Clip w hardware Pkg of 4 Pre 00880001 1...

Page 34: ...amper Assembly 1 10 06466W 2 2 Air Intake Weldment 1 10 773843 2 3 Feeder Weldment 1 10 677150 Y 2 4 Slide Plate Assembly 1 10 08037 Y 2 5 Pusher Arm Assembly 1 10 773890 Y 2 6 Feed Cover and Gasket 2...

Page 35: ...6 Y 3 6 UL Feeder Air Intake 1 10 72222 3 7 Gasket Ultra Air Intake Pkg of 10 3 44 677160 10 Y 3 8 Ultra Feeder Weldment 1 10 724132 Y 3 9 UL Feeder Pusher Arm 1 10 677187W Y 3 10 Fines Deflector No...

Page 36: ...Y Gasket 3 8 Rope White LD Ash Door or Load Door 30 Ft 1 00 00888 Y Gasket Burn Pot Tailpipe Pkg of 5 1 00 07381 Y Gasket Hopper Lid 1 00 00248 Y Hopper Lid W HInge 1 10 08518 Y Labels Caution Danger...

Page 37: ...37 PP38 Pellet Stove 3 90 08422R33_06 13 Service Maintenance Log Date Of Service Performed By Description Of Service...

Page 38: ...ts uncompromising attention to detail and helps preserve our planet by using environmentally responsible fuels Signature of Boxer Your premium quality hearth product designed and assembled by the expe...

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