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P68 Pellet Stove

Please read this entire manual before installation 

and use of this pellet fuel-burning room heater.  

Failure to follow these instructions could result in 

property damage, bodily injury, or even death.

Important Notes / Safety Concerns 

5

Installation   

 

 

 

6

Venting 

 

 

 

 

8

Automatic Operation 

 

 

15

Manual Operation   

 

 

18

ESP Control   

 

 

 

20

Low Draft Voltage Adjustment 

 

21

Room Sensor 

 

 

 

22

Maintenance  

 

 

 

23

Troubleshooting 

 

 

 

28

Specifications 

 

 

 

29

Options 

 

 

 

 

30

Wiring Diagram 

 

 

 

32

Power Failure / Back-up   

 

34

Warranty 

 

 

 

 

35

Service Parts Listing 

 

 

37

table of contents

introduction

The Award-Winning P68 Pellet Stove has the widest BTU range available, giving you 0 to 68,000 BTU 

when you need it, automatically. The only thing you need to do is set your desired room temperature 

and fill the hopper. With the P68 you will notice even heat throughout your home and a level of 

convenience you never thought possible.

The P68 epitomizes the capability of Harman Pellet Stoves, taking advantage of Harman’s 20 

years of pellet stove design, technology and manufacturing. This 68,000 BTU stove has the highest 

output, smartest controls, widest heating range, and minimal maintenance. The P68’s huge output 

is managed by a microprocessor that senses the room temperature and the fire temperature with 

tiny thermister probes and then determines the best feed rate. This improved and smarter control 

also has a diagnostic port for connecting an external display showing live working data for easier 

troubleshooting.

The platinum combination is Harman’s Patented Feeder & Burn Pot, and ESP Control which have 

been developed to their highest state. These features work together to allow amazing heat output with 

different fuel quality, ash content and moisture.

For your Safety:

  When installing a solid fuel 

appliance, it is also recommended to install Smoke 

and Carbon Monoxide Detectors on every level of 

the house. During the initial firing of the appliance, 

some smoke or odor may occur due to paint 

curing. You may want to keep some windows open 

for ventilation during the first few hours of burning 

to prevent smoke detector activation. Test your 

smoke and carbon monoxide detectors regularly.

352 Mountain House Road

Halifax, PA 17032

Summary of Contents for P68

Page 1: ...A SUITABLE FOR INSTALLATION IN MOBILE HOMES IF THIS pellet STOVE IS NOT PROPERLY INSTALLED A HOUSE FIRE MAY RESULT FOR YOUR SAFETY FOLLOW INSTALLATION DIRECTIONS CONTACT LOCAL BUILDING OR FIRE OFFICIA...

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Page 3: ...sp ci ques locales concernant les pr cautions requises lors de la travers e d un mur ou d un plafond Contr ler et nettoyer fr quemment tout le systeme d evacuation des fum es conform ment aux recomma...

Page 4: ...stove design technology and manufacturing This 68 000 BTU stove has the highest output smartest controls widest heating range and minimal maintenance The P68 s huge output is managed by a microproces...

Page 5: ...ating season and at the end of each winter for the stove to work efficiently See cleaning instructions on page 23 Mobile Manufactured Home Standards Do Not Allow Installation In Rooms Designated For S...

Page 6: ...above the burnpot Flame Guide Install the cast iron flame guide on top of the burn pot Make sure that the flame guide is fully seated on the vertical sides of the burn pot and that the back of the gui...

Page 7: ...check for possible restrictions or the need for outside air see page 10 For more information on the draft test procedure refer to Page 21 Mobile Home Installation When installing this unit in a mobile...

Page 8: ...hin 3 feet 90 cm above a gas meter regulator assembly when measured from the horizontal center line of the regulator 1 I The clearance to service regulator vent outlet must be a minimum of 6 feet 1 J...

Page 9: ...is not achieved For this reason and the fact that the P68 operates with a positive vent pressure we specify that the joints also be sealed with high temp RTV silicone Aluminum tape can also be used f...

Page 10: ...he flue outlet is more than 12 from the inlet cover The maximum length run of this pipe is 15 feet If a longer run is needed the size must be increased to 3 Inlet cover part number 1 10 08542 should b...

Page 11: ...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 four inches a...

Page 12: ...draft in the event of a power failure If the chimney condition is questionable you may want to install a liner as in method 6 The chimney should be inspected and cleaned before installing your stove I...

Page 13: ...used by the manufacturer Pipe size should be increased to 4 using this method Chimney must be of a type suitable for use with solid fuel 7 Installing into an existing chimney This method provides exce...

Page 14: ...ell in the room in the event of power failure Min above ground level 18 Venting Fig 15 Fig 14 PL vent manufacturer s firestop spacer and support See Page 7 for corner installation clearances Storm col...

Page 15: ...lect either Auto or Manual modes for the igniter using the igniter toggle switch When the toggle switch is in the Auto position the igniter located inside the burn pot is ready to automatically light...

Page 16: ...and smoke will escape through window and door gaskets When the igniter toggle switch is set to manual in this mode the distribution blower will not turn on with a temperature dial setting from 1 to 5...

Page 17: ...n to Stove Mode and put the fan on H Set the Temperature Dial to 7 Allow the unit to burn for about 30 minutes and check ash on front of burn pot Fig 18 If the ash line is larger than 1 turn the feed...

Page 18: ...e The advantage of this mode is to allow the operator to have a large viewing fire without blowing extra heat into the room During operation with the temperature dial set at 4 or less the distribution...

Page 19: ...r 30 minutes of burn time and check again If at 6 setting a 1 or less ash bed is not obtainable it is not a problem The 1 ash bed is only at maximum burn rate and at most normal settings the ash bed w...

Page 20: ...icate errors listed below Indicates power to distribution blower Status light error messages 3 Blinks Indicates an incomplete ESP circuit or that the ESP Exhaust Sensing Probe Has gone out of range a...

Page 21: ...to operate Combustion Motor Speed Control Low draft only set point The small straight screwdriver slot is plastic therefore the unit can be adjusted while in operation Fig 22 Fig 23 A simple draft te...

Page 22: ...room air being drawn into the distribution fan NOTE Distances of more than 25 feet from the unit or in another room are not recommended The room sensor is essential for the P68 s excellent efficiency...

Page 23: ...is cold and shut down when removing ash pan 1 Pull on latch handle and remove ash pan Use ash pan handle to carry and dispose of ashes 2 Slide the ash pan back into the stove and latch the door by pu...

Page 24: ...out plate Latch open with blower cover partly removed Burn pot clean out is open Latch closed with blower cover in place Burn pot clean out is closed Fig 29 Fig 28 ESP Probe 5 Open burn pot clean out...

Page 25: ...lated male female wire connectors These connections between the hot leads the wires inside the burn pot and the cold leads the wires from the control board are always pulled to the inside rear of the...

Page 26: ...the gasket channel should be free of all loose particles The gasket cement used to hold the gasket in place is RTV HIGH TEMPERATURE silicone Put a bead of RTV silicone in the bottom of the gasket chan...

Page 27: ...tainers and screws Apply the gasket material to the face of the new glass Lay the glass into the door making sure that the glass is contained within the channels and raised areas of the door itself La...

Page 28: ...el 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 SMOKE IS VISIBLE COMING OUT OF VENT 1 Ai...

Page 29: ...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 1...

Page 30: ...auge steel This is the minimum size for floor protection with this unit Part 1 00 06727 Hopper Extension The hopper extension allows you to put more pellet fuel in the hopper and extends burn time on...

Page 31: ...for samples The Brushed Stainless deer cutout pictured below is another option available This cutout reveals the color of the stove through the cut out shapes On the rear of the stove hopper there is...

Page 32: ...UND P O W E R C O R D 1 8 3 R U B B E R C O R D WHITE GREEN BLUE GREEN WHITE RED MALE FEMALE CONNECTIONS BROWN WHITE N O CONTACTS MALE FEMALE CONNECTIONS LT BLUE LT BLUE INSIDE BURNPOT IGNITER ELEMENT...

Page 33: ...o 2 or 3 Set 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 of...

Page 34: ...continued operation Your appliance will recognize when power is restored What happens depends on ESP temperature and whether it is equipped with automatic ignition in automatic setting units equipped...

Page 35: ...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 whichever occ...

Page 36: ...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 and is not covered under warranty Damage to printed plated...

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Page 42: ...42 P68 Pellet Stove Service Maintenance Log...

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Page 44: ...00 Recycled Paper At Harman we build each product to a standard not a price Signature of Boxer Your premium quality hearth product designed and assembled by the experienced and skilled members at Harm...

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