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PP38+ Pellet Stove

3-90-08422R33_06/13

sMoKe is visible coMing out oF vent

1.  Air-fuel ratio is too rich.

a. Feed rate too high.
b. Draft too low caused by a gasket leak.

low heat outPut

1. Feed rate too low
2. Draft too low because of gasket leak.
3. Poor quality or damp pellets
4. Combination of 1 and 2.

trouble-shooting

helpful hints

cleaning burn Pot

Whenever your stove is not burning, take the opportunity to 

scrape the burn pot to remove carbon buildup. A vacuum 

cleaner is handy to remove the residue. 

be sure the stove 

is cold if you use a vacuum.

Carbon buildup can be scraped loose with the fire burning 

using the special tool provided with your stove. Scrape the 

floor and sides of the burn pot. The carbon will be pushed out 

by the incoming fuel. Always wear gloves to do this.

removing ashes

Turn the Temp Dial to number 1 approximately 30 minutes 

before removing ashes. This will result in a cooler stove and 

ash pan.
Maximum  Feed Adjuster  settings  are  not  needed  in  most 

cases. Operating in the normal range (#4) is recommended 

when maximum heat output is not required. The ESP control 

prevents the stove from being over-fired.
Keep the stove free of dust and dirt.

stove does not Feed

1.  No fuel in hopper.
2.  Firebox draft may be too low for sensing switch in feeder 

circuit  to  operate. 

check for closed doors

,  loose  or 

missing gasket on doors or hopper lid.

3.  Feed motor will not run until the ESP control senses a 

certain temperature. Maybe you did not put enough fuel 

or starting gel in the burn pot before manually lighting the 

fire.

4.  Restriction in the hopper or feeder. Remove all fuel and 

examine. Clear the obstruction.

5.  Feed motor has failed.

PartiallY burned Pellets

1.  Feed rate too high.
2.  Poor air to fuel mixture. (Check burn pot clean-out cover 

and air intake).

3.  Burn  pot  or  heat  exchanger  tubes  may  need    to  be 

cleaned.

4.  Combination of all the above.
5. 

#6 status 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. When the control board 

has calculated poor or incomplete combustion, it will shut 

down the unit as a safety feature. (Poor or incomplete 

combustion is a contributor of creosote which may cause 

a chimney fire)

a 6 blink status may be caused by several things:

1.  Blocked or partially blocked flue.
2.  Blocked or partially blocked inlet air.

a. Backdraft damper on the inlet pipe may be stuck closed.
b. If outside air is installed, the inlet cover may be blocked.

3.  The air chamber under the burnpot may be filled with fines 

and small bits of ash.

4.  The holes in the burnpot may be getting filled with ash or 

carbon buildup.

5.  Combustion blower fan blades may need cleaned.
6.  Fuel restrictions as noted above.

sMoKe sMell

Seal the vent pipe joints and connection to stove with silicone. 

The exhaust vent is the only part of the system that is under 

positive pressure.

Fire has gone out- check for status light.

1.  No fuel in hopper.
2.  Draft is too low, blocked flue.
3.  Something is restricting fuel flow.
4.  Hopper lid not closed properly.
5.  Feed motor or combustion blower has failed.

Fuel

Pellet fuels are put into 3 categories in terms of ash content. 

Premium at 1% or less, Standard at 3% or less  and all others 

at 3% or more.
The PP38+ is capable of burning all 3 categories of pellets 

due to a patented feeder and burn pot system.
It should be noted, however, that higher ash content, and 

when  mixing  with  corn,  will  require  more  frequent  ash 

removal,  scraping  of  the  burn  pot,  and  may  provide  less 

BTU's per pound. Normally, standard and high ash pellets 

cost  less  than  premium  pellets  and  can  be  cost  effective 

when burned in the PP38+.
The moisture content of pellets must not exceed 8%, and 

corn 15%. Higher moisture will rob BTU's and may not burn 

properly.
  Fuel  should 

not 

be  stored  within  the  stove  installation 

clearances or within the space required for charging and ash 

removal. See Page 7.

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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