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March 2011

Flex Fuel Owner’s Manual

6: Fuels

All fuels must conform to certain quality standards to ensure trouble free operation of the furnace.

Use of unapproved fuels may result in faulty operation and a voided warranty. Never use the follow-

ing: trash, plastics, gasoline, rubber, or naphtha. Please contact your WoodMaster Flex fuel dealer for

any questions on fuel use.

6.1 Pellets

Only premium pellets certified by the Pellet Fuels Institute may be used and must follow these

guidelines:

• Bulk density per cubic foot must be a minimum of 40 pounds

• The diameter is between 1/4 inch to 5/16 inch

• Maximum length is 1.5 inches

• Fines (dust) of not more than 0.5% by weight

• Sodium content shall be less than 300 parts per million

• Ash content of 1% or less

• Moisture content of 10% or less

Note: Pellets should be stored in a dry area and should not be allowed to get wet.

Handle pellets with care.

6.2 Bulk Material

Only cut, split, seasoned wood with a internal moisture content of 25% or less may be used. Wood can be

cut to a maximum length of 21 inches for the Flex fuel 30 and a maximum of 26 inches for the Flex fuel

60. The wood should always be placed horizontally and parallel to the firebox wall. The pieces of wood

should be stacked as tightly as possible whereby the face of the wood should NOT touch the firebox

wall. This ensures that it slides correctly. DO NOT burn any large, round pieces of wood. DO NOT burn

any “green wood”, or any wood that is above the 25% moisture limit.

Water Content

The maximum permitted water content is 25%.

Bark Content

The maximum permitted bark content is 20%.

Содержание Flex Fuel

Страница 1: ...Northwest Manufacturing Inc 600 Polk Ave SW Red Lake Falls MN 56750 www woodmaster com Retain this manual Owners Manual Manual PN 7994 300 ...

Страница 2: ...th this product which stands out from the competition in terms of ease of use furnace efficiency and low emissions May quality workmanship and on going product enhancement never be just a passing thought but rath er an everyday tangible aspect that improves the lives of our employees dealers and customers alike Burning Wood Burning Pellets ...

Страница 3: ...f 23 8 Display 24 8 1 The Start Screen 25 8 2 Menu Navigation 26 9 Basic Furnace Settings 28 9 1 Set Required Furnace Values 28 9 2 Select Furnace Operating Mode 28 9 3 Boiler Cleaning 28 9 4 Vacuum Output Heat Exchanger 28 9 5 Setting the Clock Date 29 9 6 Service Menu 29 9 7 Alarm Protocol 29 9 8 Output Test Heating Cycle 30 9 9 Output Test Boiler 30 9 10 Language Selection Temperature Scale Sel...

Страница 4: ...ivating Bulk materials auto control 51 12 6 Status Lines for Operating mode Bulk materials auto control 51 12 7 Automatic Change Over of Furnace Operating Mode 51 13 Pellets Auto Control 52 13 1 General Information 52 13 2 Pre Firing Checks 52 13 3 Adjusting the Pellet Slide 53 13 4 Starting the Furnace in Operating Mode Pellets Auto Control 55 13 5 Opening the Firebox Door During Pellets Auto Con...

Страница 5: ...d as fuel Flue AKA Chimney Any duct or passage for air gas or exhaust Air Factor Indicator of oxygen level of the flue gas Display AKA Eco manager screen for user to change settings and parameters I O Board Input output board that controls the furnace functions Firebox Chamber where fuel is loaded or conveyed Water Jacket Steel casing that surrounds the firebox and holds the water antifreeze Funne...

Страница 6: ...lets Fuel Shut Off Metal gate used to isolate fuel storage from high temperatures and or fire Call for Heat Heat demands from circuits utilized in heating system designs Release A demand set by the operator for the furnace to carry out a function Blow Down The process of removing sediment deposits from the furnace buffer tank s by draining water from the bottom of the unit s until the water runs c...

Страница 7: ...ealer Freeze protection must be guaranteed in all water bearing parts in the event of extensive idle periods of the system Note Your Flex fuel is not intended to be your only heat source In the event that your existing heat source will not back up your Flex fuel antifreeze must be used The Flex fuel system must not be exposed to external mechanical stress for example as storage climbing support br...

Страница 8: ...8 Flex Fuel Owner s Manual March 2011 3 Safety UL Certification ...

Страница 9: ...to hold enough wood for up to a four hour burn at max burn rate 7 Inserts for Pellets or Bulk Materials Easily changed when switching operating mode No tools required 8 Heat Exchanger Efficient transfer of heat and are self cleaning 9 Flange for Automatic Loading Both Sides Allows the optional pellet arm to be installed on either side 10 Exhaust Pipe Allows easy installation to both new and existi...

Страница 10: ...room around your Flex fuel to make loading and cleaning your furnace easier This area should also be clear of any easily combustible materials Minimum clearances requirements is 11 inches for the top 14 inches for the sides 19 5 inches for the back and open to the front The room where the furnace is placed should allow ample venting to ensure proper air flow to the furnace The vent size requiremen...

Страница 11: ...red A barometric damper must be used to allow proper flow The damper must be installed as close to the furnace as possible The chimney draw must be 0 1 mbars Chimneys must follow all state and local codes Your Flex fuel can be vented into an existing chimney as long as the chimney fits the necessary criteria Furnace Supply Pump Diverting Valve Diverting Valve Temp Probe Return to Furnace Return fr...

Страница 12: ...emperatures can be read at the furnace Doing so aides in determining load size Plate zone pump must run continuously or wired to run simultaneously with the furnace pump to take heat off the furnace plate when furnace is heating Pump Diverting Valve 10 Gal Expansion Tank 20 Gal Expansion Tank Temp Probe Temp Probe Furnace Plate This document contains information that is property of Northwest Mfg N...

Страница 13: ...4 1 Sw St 90 3 0020 227 1 MPT x 1 F Sw 2 0020 230 1 Sw T 0020 233 1 M Sw x 1 FPT 2 0020 250 1 x 2 Nipple 0020 258 1 1 2 x 1 Reducer 3 0020 270 1 1 2 Street 90 0020 271 1 1 2 Tee 2 0020 272 1 1 2 x 1 2 Reducer 0020 366 ISO Pump Flanges 0109 003 1 2 Thermowell 63025 Diverting Valve 57094 Thermostatic Head Copper Pipe Copper Pipe Copper Pipe 0020 258 1 1 2 x 1 Reducer 0020 258 1 1 2 x 1 Reducer 0020 ...

Страница 14: ...sion tank and furnace Failure to vent the furnace may result to damage to the furnace and or severe injury or death Expansion Tank Kit The following images shows the basic layout for attaching the site tube and vent cap to your expansion tank Installation is the same for both the 10 and 20 gallon tanks Ensure that the vent is properly used and that the system is not allowed to become pressurized T...

Страница 15: ...r 1 Pex Note Contents are the same for both horizontal and vertical layouts Buffer Tank The size of the buffer tank is determined by the size of the furnace Recommended buffer tank capacities are approximately 165 gallons for the Flex fuel 30 kW running only on pellets and approximately 300 gallons if bulk materials are to be used Approximately 285 gallons is recommended for the Flex fuel 60 kW ru...

Страница 16: ... for using this buffer tank with 1 Pex line or 1 copper line The tank should be installed by a qualified plumber All Threaded fittings require the used of thread seal tape or pipe dope Buffer Tank Not Included Buffer Tank Not Included 0020 197 1 FPT Ball Valve 0020 197 1 FPT Ball Valve 0020 197 1 FPT Ball Valve 0020 250 1 x 2 Blk Nipple 0020 250 1 x 2 Blk Nipple 0020 250 1 x 2 Blk Nipple 0020 189 ...

Страница 17: ... heated to avoid water from spilling over The buffer tank s should be filled from the bottom of the tank while filling the tank the valve on the top should be open to vent the air out of the system Once all the air is out of the tank close the top valve It is necessary to monitor and bleed off any excess air that may be in the system once the furnace is operational However do not try to bleed the ...

Страница 18: ...Extraction PE N L TK TK FOT Secondary Heat Source Extra SCP Storage Tank Storage Tank Pump Stove Pump Heat 2 Heat 1 Mixer 2 Mixer 1 N L N L N L N L N L N L N L1 L2 N L1 L2 N L COM POWER DI Temp Draft Inducer Speed Bin Switch Reverse SPARE FUSE 10A NO C NC NO C NC MAIN FUSE 10A 120 VAC 60 Hz EXP Bus Outside Temp Storage Tank Temp 2 Storage Tank Temp 1 Flow Temp 2 Room Temp 2 Stove Temp 2 Room Temp ...

Страница 19: ...19 March 2011 Flex Fuel Owner s Manual 5 Installation Flex fuel 60 kW Flex fuel 30 kW 4 Main Circulating Pump Connections ...

Страница 20: ... installed below any existing Off Peak electric coils already in the plenum After the installation of the WoodMaster add on water to air exchanger the air flow may need to be in creased to fuel furnaces electric furnaces and electric gas furnaces Contact your dealer for assistance Existing Hot Water Heat A Water to Water Heat Transfer Unit is used to connect to an existing hot water boiler system ...

Страница 21: ...e less than 300 parts per million Ash content of 1 or less Moisture content of 10 or less Note Pellets should be stored in a dry area and should not be allowed to get wet Handle pellets with care 6 2 Bulk Material Only cut split seasoned wood with a internal moisture content of 25 or less may be used Wood can be cut to a maximum length of 21 inches for the Flex fuel 30 and a maximum of 26 inches f...

Страница 22: ...mode Bulk materials with current operating status Boiler is switched off To switch on the furnace press and hold the control knob for 3 4 seconds The following confirmation message appears on the display for several seconds 7 Switching the Furnace On Off FLEX FUEL V 10 060 Tu 12 09 10 Bulk materials Boiler temperature Flue gas temperature Air factor Boiler is switched off 81ºF 13 44 117ºF 7 40 Sof...

Страница 23: ... operating modes Pellets auto control Bulk materials and Bulk materials auto control 7 2 Switching the Furnace Off To switch the furnace off press and hold the ESC button when the start screen is being displayed A switch off message is displayed for several seconds before returning to the start screen The status line then indicates Boiler is switched off If the furnace is running in Bulk materials...

Страница 24: ...tart up the furnace and activate the smoldering gas extraction The ESC button to the right of the rotary button may be used at any time to quit a particular sub menu Pressing this button several times will return you to the start screen Press and hold the ESC button for 3 seconds when the start screen is displayed to switch off the furnace Smoldering gas extraction can also be deactivated by press...

Страница 25: ...d on military time format The currently selected furnace operating mode is displayed Depending on the furnace model the following furnace operating modes are available Bulk materials Bulk materials auto control Pellets auto control Read further in this section to gain a better understanding of menu navigation otherwise proceed to the next section FLEX FUEL V 10 060 Tu 12 09 10 Bulk materials Boile...

Страница 26: ... boiler Operating hour counter Language selection Unit BASIC BOILER SETTINGS Set required boiler values Select boiler operating mode Boiler cleaning Vacuum output heat exchanger Set clock date Service menu Alarm protocol Output test heat cycle Output test boiler Operating hour counter Language selection Unit Set CLOCK DATE Date 10 09 10 Time 17 05 Set CLOCK DATE Date 10 09 10 Time 17 05 Set CLOCK ...

Страница 27: ... starting screen Data WILL NOT be changed by using the ESC key 8 Display UP DOWN SYMBOL If this symbol appears navigate within the just displayed menu by turning the control knob RIGHT LEFT SYMBOL If this symbol appears scroll between various main menus by turning the control knob CHANGE SYMBOL If this symbol appears on the screen you will change a single setting by turning the control knob If you...

Страница 28: ... less the set start difference 9 2 Select Furnace Operating Mode Please refer to section 10 Operating Modes if you want to change the operating mode 9 3 Boiler Cleaning In this menu you can select to start the furnace cleaning manually by pressing the control knob 9 4 Vacuum Output Heat Exchanger The heat exchanger cleaning cycle activates within the set release period depending on the furnace ope...

Страница 29: ...ng up the following screen When pressing the control knob on the alarm protocol screen the symbol LEFT RIGHT appears in the upper right hand corner and all previous alarms can be scrolled through Note 40 entries are stored After the 40th entry alarm number 39 the oldest entry with alarm number 0 is deleted It will store when the error message was triggered and when it was cancelled Therefore there...

Страница 30: ...g the control knob select the output that you would like to activate and press the control knob The cursor changes to the entry field You can switch the output on and or off by turning the control knob The input options change from Off to Open to Close in the entry fields of mixer 1 and mixer 2 Press the control knob in order to save the selection and or to leave the input field The cursor now cha...

Страница 31: ...the control knob again The cursor now moves to the respective setting parameter which you can change by turning the control knob Confirm your entry with the control knob and verify that the respective system component is really activated Press the ESC key to exit this menu The cursor now moves to the header and you will exit this menu by pressing the ESC key All activated components are automatica...

Страница 32: ...urs Furnace runtime during which the Operating status was Pellets mode in hours Number of furnace starts applies to furnace operating modes Bulk materials or Bulk materials automatic The counter always increases by 1 if the operating status changes either from Please ignite to Bulk materials for furnace operating mode Bulk materials or from Automatic ignition to Bulk materials for furnace operatin...

Страница 33: ...de Pellets Manual Filling Your Furnace can be loaded with wood pellets Next to the furnace is a hopper that the furnace auto feeds from The hopper is manually refilled by the operator of the unit The pellets are automatically ignited by the igniter Note Your Flex fuel furnace may not have the igniter or pellet option installed If this is the case the system will not let you select Bulk materials a...

Страница 34: ...auto control In this case changeover is not possible and the following message is shown on the display for several seconds Changeover in status bulk materials not possible The following table summarizes the operational states which permit a change of furnace operating mode 10 Operating Modes Possible Operating Status Change over possible for any operational status Heat exchanger cleaning waiting t...

Страница 35: ... required boiler values Select boiler operating mode Boiler cleaning Vacuum output heat exchanger Set clock date Service menu Alarm protocol Output test heat cycle Output test boiler Operating hour counter Language selection Unit Press the control knob and then turn it to scroll down until Select boiler operating mode is selected BOILER OPERATING MODE Bulk materials Bulk materials auto control Pel...

Страница 36: ...e sub menu A confirmation message is displayed once the control knob is pressed to confirm the change The following picture illustrates the confirma tion of a successful change to operating mode Pellets auto control BOILER OPERATING MODE Bulk materials Bulk materials auto control Pellets auto control selected boiler mode Pellets auto control You will then be returned to the menu BOILER OPERATING M...

Страница 37: ... draft can be guaranteed The ash residues can be guided into the ash chamber through the insert using the fire irons Section 15 Check the Primary Air Feed To guarantee that your Flex fuel receives the oxygen feed necessary for ensuring clean burning the two air deflectors which are located on the right and left furnace side walls in the firebox must be checked or cleaned with the fire irons Sectio...

Страница 38: ...lable prior to the firing process First check the temperatures in your buffer tank s If the temperature is still suf ficient you should postpone the firing process until later 11 Bulk Materials Mode Fuels The fuel used should have the following characteristics Small sized non coated easily combustible igniting material cardboard newspaper Kindling aka dry small sized easily combustible material sm...

Страница 39: ... the height of the air deflectors making sure to fully cover the bottom of the chamber 11 Bulk Materials Mode Then spread your firing material in the firebox making sure that it covers the entire bottom of the firebox Note A cardboard and paper combination works best at starting the fire Now ignite the material making sure that it is ignited in several positions ...

Страница 40: ...s temperature exceeds the flue gas start temperature The induced draft fan will now regu late according to the furnace temperature 11 Bulk Materials Mode Now wait 1 to 2 minutes until a clean full area fire bed has formed Now you can begin to lay a layer of the medium sized bulk material in the firebox It is recommended to activate smoldering gas extraction while filling the furnace section11 4 Ag...

Страница 41: ...eed and the primary air feed is interrupted The text Smoldering gas extraction Please add more will appear on the status line after several seconds Carefully open the firebox door and start the filling process Deactivating Smoldering Gas Extraction After filling is completed close the fuel door and deactivate smoldering gas extraction by pressing the ESC button for 3 4 seconds A deactivation messa...

Страница 42: ...tes factory default setting 10 20 minutes Bulk materials Part load When the furnace is in Bulk Materials mode and there is no call for heat the furnace may enter Bulk materials part load to avoid overheating So that it does not overheat the furnace is controlled based on the required furnace temperature factory setting with its speed adjusted down This occurs if the demand for heat is too low or t...

Страница 43: ...ons are not to be understood as a furnace malfunction or fault The instructions are solely to alert the system operator of possible erratic behavior The following instructions are possible When firing is not necessary This instruction is displayed if the system operator wants to ignite the furnace and the buffer tank s is are already full Before firing it is recommended that the buffer temperature...

Страница 44: ...g time since the heat exchangers were cleaned Only add fuel if more heat is required If this is not the case please let the furnace burn out so that automatic heat exchanger cleaning can be carried out Upon completion of the burn off This instruction is displayed if the burn off has ended and the furnace was already being operated in part load mode This instruction provides information to the syst...

Страница 45: ...s auto control change the furnace operating mode as described in section 10 12 2 Pre Firing Checks Check the Firebox Check that there are no foreign objects in the firebox and place the insert for Bulk Materials Mode is in the firebox Ensure also that ash residues are removed from the firebox In particular the insert should be free from residues so that a down draft can be guaranteed The ash resid...

Страница 46: ...Filling the Furnace Note Smoldering Gas Extraction is not available at this time To vent the furnace to prevent ash from exiting through the firebox door it is possible to turn on the fans via Output Tests Boiler Section 9 and switch the draft fan on Outputs 1 screen while you load the furnace then switch it off The filling procedure can begin providing change over is permitted Note The furnace wi...

Страница 47: ...er of bulk materials Ensure that there is paper close to the igniter tube 12 Bulk Materials Auto Mode Then begin to cover with a layer of paper making sure that the paper is spread across the entire bottom of the firebox Cover the layer of paper with a layer of cardboard again making sure to cover the entire bottom of the firebox ...

Страница 48: ...ucer fan must be switch off before the release period can be set Once the furnace has been filled it is possible to set a release period during which automatic ignition should take place If the start screen is not displayed press the ESC button until it appears FLEX FUEL V 10 060 Tu 12 09 10 Bulk materials Boiler temperature Flue gas temperature Air factor Stop system XXXºF 13 44 XXXºF X XX Now yo...

Страница 49: ...o control can now be adjusted so that the ignition process only starts at certain times providing a heating circuit demand is present The screen BM AUTO CONTROL Mo Fr Sa Su is shown on the display Now you can select whether you wish to modify the release periods for Monday to Friday or Saturday to Sunday For example select Monday to Friday and the screen BM AUTO CONTROL Mo Fr is shown on the displ...

Страница 50: ... can now select up to three release periods If furnace operating mode Bulk materials auto control is selected and there is a call for heat the furnace will start as soon as a time window becomes active Release Mode manual start If release mode manual start is selected the ignition process is started immediately if the furnace operating mode is set to Bulk materials auto control This release mode d...

Страница 51: ...lity The furnace automatically starts when there is a call for heat and the furnace temperature is lower than the set furnace target temperature less the set starting difference Automatic ignition The furnace will automatically start up automatic ignition as soon as a heating circuit demand is present and a time release has been issued This will continue until the flue gas temperature exceeds the ...

Страница 52: ...d from the firebox In particular the insert should be free from residues so that a down draft can be guaranteed The ash residues can be guided into the ash chamber through the insert using the fire irons Section 15 Check the Primary Air Feed To guarantee that your Flex fuel receives the oxygen feed necessary for ensuring clean burning the two air deflectors which are located on the right and left ...

Страница 53: ...llet slide is used to guide the pellets fall into the center of the insert The slope of the pellets slide may be set using an adjustment screw which is accessible from the outside wall of the furnace The lower panel cover of the pellet feeder must first be removed to access the bolt Undo the counter nut of the adjustment bolt Fig 1 and then turn the screw to adjust the slope of the pellet slide No...

Страница 54: ...rnace to burn for another 45 minutes and check the pile again If it is still not burning in the center adjust again Repeat this process until the pile is evenly centered on the insert Once this is achieved lock the counter nut and replace the panel Check the slide adjustment once a month to ensure a proper burn Note Adjusting the slide is a time consuming process Allow yourself at least 2 5 hours ...

Страница 55: ...ntly monitored the furnace will shut down if these values deviate from their expected values status line FGT drop or air factor too high This monitoring function can be deactivated as it is occasionally necessary to open the firebox doors and look inside the firebox The monitoring function is only active in operational states Start phase or Pellets mode If the start screen is shown on the display ...

Страница 56: ...use the air factor to rise and the furnace may auto shut down You should not need to open the firebox door during any point of operation under Pellets auto control Ignition phase Once the insert is covered with pellets the pellets are ignited by the igniter The ignition pulse is activated as soon as the air factor exceeds the factory default This pulse is switched off after a set time will complet...

Страница 57: ... is switched off Fan lag The furnace was switched off in operational state Ignition phase Start phase or Pellets mode The furnace completes pellets operation by initiating Fan lag Fan lag ends when the flue gas temperature falls below the switch off threshold and the run on time has elapsed The furnace then switches to operational status Boiler is switched off Only when the operational status Boil...

Страница 58: ... temperature falls below the factory default switch off threshold and the run on time has elapsed The furnace then switches to standby mode Availability and automatically restarts when a heating circuit demand is present Flue gas temperature too low Fan lag In automatic mode pellets the flue gas temperature has not exceeded a necessary threshold or has fallen below the threshold for a long time Th...

Страница 59: ...s blocked The insert is worn or the fuel has a very high dust fraction so that a lot unburned material falls through the insert The insert is clogged with ash foreign bodies etc and should be cleaned Switch the furnace off wait until the operating status Boiler off is displayed and the furnace to cool then clean the insert The furnace completes Pellets mode by initiating Fan lag Fan lag ends when ...

Страница 60: ...more than once the furnace turns off Fan lag Please wait Fan lag has been activated for no apparent reason Possible causes Power outage The safety temperature limiter tripped and has just been reset Wait for the run on cycle to finish 10 30 minutes the furnace will automatically start afterwards Note Fan lag cannot be aborted The run on timer is restarted after every power outage It can therefore ...

Страница 61: ...n be adjusted from 0 194 F The buffer is charged until the buffer temperature bottom is greater than the set max buffer temperature bottom if the buffer has a chronological release Buffer Difference The temperature can be adjusted from 0 68 F The buffer difference temperature is the temperature by which the buffer temperature top may be less than the required flow temperature before the furnace is...

Страница 62: ...to freeze protection temp Refer to general heating cycle 1 settings Always On The buffer temperature is recharged if the buffer temperature top has dropped below the set minimum buffer temperature top With Clock The buffer is only recharged within the set release periods if its buffer temperature top has dropped below the set minimum buffer temperature top Release Period 1 to 3 You can set 3 diffe...

Страница 63: ...med 15 2 Cleaning the Furnace Disconnect the power source prior to cleaning Never clean your furnace during operation Wait for the furnace to cool before cleaning the furnace Correctly dispose of the ashes in a sealed metal container away from flammable materials Cleaning intervals will vary depending on the quality of the fuel being used Cleaning Intervals Air Feed As required following visual in...

Страница 64: ...f the furnace A mild soap may be used if needed DO NOT use harsh chemicals or abrasive material Cleaning the Flue Pipe Ash should be removed from the flue pipe through the cleaning openings approximately 2 times a year Annual Buffer Tank Blow Down Water should be drained from the bottom of the buffer tank to remove any sediment buildup The water should drain until it runs clear approximately 2 gal...

Страница 65: ...65 March 2011 Flex Fuel Owner s Manual 15 Maintenance Notes ...

Страница 66: ...se on the I O Board section 5 6 Additional replacement fuses can be obtained at your Woodmaster Flex Fuel Dealer Disconnect the furnace from the main power supply before replacing the triac fuse unplug the main connector or switch off the main circuit breaker for the heating system Reconnect the furnace to the main power supply after the triac fuse has been replaced The error message will disappea...

Страница 67: ...oose cabling on fan motor The induced draft fan is jammed The induced draft fan is faulty Press Start to activate the fan run on time approximately 20 minutes If combustion is still in progress the furnace automatically switches to Bulk materials mode otherwise the fan completes its fan lag cycle and the furnace shuts down Press the ESC button to switch off the furnace Feed blocked or overloaded T...

Страница 68: ...le to clear the cause of the fault press the Control Knob otherwise switch off the furnace using the STOP button and notify your WoodMaster Flex fuel Dealer Break of feed sensor The selected furnace operating mode is set to Pellets automatic and the feed sensor has been retracted or has a break The furnace operating mode is automatically reset to Bulk materials Check whether the feed sensor is cor...

Страница 69: ...your WoodMaster Flex fuel Dealer for different pellet options Bulk materials cavitate in the firebox The fuel may be binding on the sides of the firebox Check that the fuel used is within the recommended length and is not contacting the walls with the cut ends The furnace has operated in Part Load for an extended period of time This can cause the fuel to burn unevenly and can cause pockets to form...

Страница 70: ...nts are running which rarely occurs 2 8 kilowatts per day less than 1 amp 100 000 btu h 200 000 btu h 350 pounds Max 22 5 L x 14 W x 25 T 26 5 L x 22 W x 28 T 24 W x 48 L x 54 T W O Display 32 5 W x 60 L x 60 T W O Display 13 5 W x 9 5 T 21 5 W x 10 T 1 4 Firebox 1 8 Water Jacket Fan Induced Eco manager Digital Display Bulk Materials Wood Pellets Optional Bulk Materials Manual Pellets Auto feed fr...

Страница 71: ...ashes and creosote a minimum of two 2 times per year preferably half way through the heating season and immediately after the heating season If the furnace is being used year round more maintenance is required thus the firebox must be completely cleaned of all ashes and creosote a minimum of four 4 times per year Installation of an approved Class A insulated chimney and chimney cap must be used Tw...

Страница 72: ...0 PLACE POSTAGE HERE Name _________________________________________ Address _______________________________________ _______________________________________________ Phone ________________________________________ Date of Purchase ________________________________ Model No ______________________________________ Serial No ______________________________________ Model and serial numbers are located on th...

Страница 73: ...ashes and creosote a minimum of two 2 times per year preferably half way through the heating season and immediately after the heating season If the furnace is being used year round more maintenance is required thus the firebox must be completely cleaned of all ashes and creosote a minimum of four 4 times per year Installation of an approved Class A insulated chimney and chimney cap must be used Tw...

Страница 74: ...0 PLACE POSTAGE HERE Name _________________________________________ Address _______________________________________ _______________________________________________ Phone ________________________________________ Date of Purchase ________________________________ Model No ______________________________________ Serial No ______________________________________ Model and serial numbers are located on th...

Страница 75: ...he heating season and immediately after the heating season If the furnace is being used year round more maintenance is required thus the firebox must be completely cleaned of all ashes and creosote a minimum of four 4 times per year Installation of an approved Class A insulated chimney and chimney cap must be used Two Year Warranty on Additional Components Parts and Labor Northwest Manufacturing I...

Страница 76: ...May quality workmanship and on going product enhancement never be just a passing thought but rather an everyday tangible aspect that improves the lives of our employees dealers and customers alike ...

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