Wood master 3300 Installation guide

Owner’s Manual
Northwest Manufacturing, Inc.
600 Polk Ave SW
Red Lake Falls, MN 56750
Retain this manual/Conserver ce manuel
3300
4400 Heavy Duty
5500 Super Duty
6500 Super Duty
Installation, Operation
& Maintenance Manual
Models:
www.woodmaster.com
7994-500

Dear Customer,
We at Northwest Mfg., Inc. would like to thank you for purchasing the
WoodMaster heating system.
It is our goal to build the highest quality product at a competitive price,
and maintain total customer satisfaction.
This manual is a guide for installing, operating, and maintaining your
new WoodMaster.
Follow and observe all safety and warning instructions.
The Staff,
WoodMaster Furnaces
Web: www.woodmaster.com

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Woodmaster Owner’s ManualAugust 2012
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Table of Contents
Table of Contents ............................................................................................. 3
Best Burn Practices.......................................................................................... 4
Safety .............................................................................................................. 5
Features............................................................................................................ 6
Installation........................................................................................................ 7
The Furnace................................................................................................ 7
Choosing Location................................................................................ 7
  ChimneySpecications ........................................................................ 7
Block or Pad Supports .......................................................................... 7
Trench ................................................................................................... 7
Mounting the Pump .............................................................................. 8
Hooking Up Water Lines ...................................................................... 8
Wiring the Pump ................................................................................... 8
The Home................................................................................................... 9
Domestic Hot Water.............................................................................. 9
Existing Forced Air............................................................................... 9
Existing Hot Water Heat ..................................................................... 10
Inline Filter and Fill Valve.................................................................. 10
Auger Assembly.................................................................................. 10
Operation........................................................................................................ 11
Filling with Water..................................................................................... 11
Bleeding the System................................................................................. 11
Firing the Furnace .................................................................................... 12
Loading the Furnace................................................................................. 12
Boiler Treatment....................................................................................... 13
Ash Rotation............................................................................................. 13
Ash Removal and Disposal ...................................................................... 13
Maintenance................................................................................................... 14
BafeBypassChamberAshRemoval..................................................... 14
Creosote -- Formation and Removal ........................................................ 14
Annual WoodMaster Maintenance .......................................................... 14
Boiler Treatment....................................................................................... 14
Troubleshooting ............................................................................................. 15
E.T.C. Guide .................................................................................................. 16
E.T.C. Reference.......................................................................................17-22
Wiring Diagrams............................................................................................ 23
TechnicalSpecications&SlabDimensions ................................................ 24
Warranty......................................................................................................... 25

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Best Burn Practices
1. Read and follow all operating instructions supplied by the manufacturer.
2. FUEL USED: Burn only split and seasoned wood with 25% moisture content or less. DO NOT burn green
wood. Never use the following: trash, plastics, gasoline, rubber, naphtha, household garbage, material
treated with petroleum products (particle board, railroad ties and pressure treated wood), leaves and
 cardboard.Paperproductsshouldonlybeusedwhenringyourfurnace.
3. LOADING FUEL:Foramoreefcientburn,paycarefulattentiontoloadingtimesandamounts.Follow
the manufacturer’s written instructions for recommended loading times and amounts.
4. STARTERS:Donotuselighteruids,gasoline,orchemicals.Usepaperproductsandkindlingonly.
5. LOCATION: It is recommended that the unit be located with due consideration to the prevailing
wind direction.
 • Whenusingmorethat4feetofchimneyextensionexternalsupportisneeded.
 •Mustbelocatedatleast25feetfromthepropertyline
 •Shouldbelocatedgreaterthan100feetfromanyresidencenotserved.
 •Iflocatedbetween100and300feettoanyresidencenotserved,itisrecommendedthatthe
  stackbeatleast100%oftheheightofthepeakoftheresidence,plusanadditional2feet.
6. Always remember to comply with all applicable state and local codes.
Residence not
served by furnace
2 feet
Residence
served by furnaceMinimum of 100 feet
Chimney height
should be 2 feet above roof line

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IMPORTANTS INSTRUCTIONS
DE SECÛRITÉ
LISEZ TOUT CES INSTRUCTIONS
AVANT L’INSTALLATION
Precautions a prendre avant l’installation
Tout installations et opérations doivent être
faites en accord aux régulations en force dans
votre localité, province ou etat pour le cablage electrique, la
plomberie et l’opération de cette unité. Ces régulations peuvent
differer de celle de ce manuel. L’installation doit être entrepris
par un TechnicienQualié.
Lisez et suivez attentivement ces directions.
Conservez ce manuel aussi longtemps que
vous possederez votre WoodMaster.
Tous les models WoodMaster s’opèrent à la
pression atmosphérique. NE PAS boucher ou
crée d’obstructions qui pourrai restreindre de débit du tuyau de
surcharge situé directement a l’arrière de la cheminée en haut de
foyer.
Le WoodMaster a été concue pour être utilisé
a l’extérieure. Nous ne recommandons pas
qu’il soit installé a l’intérieure d’un batiment.
Il est recommandé par le fabricant qu’une
distance minimal de 25 piéds entre le foyer et
toutbatimentsouzoneinammable.Siplacéàproximitéd’une
zoneinammable,unebarièrreanti-étincellesdoitêtreutilisé.
L’opération de la chaudière doit être restreinte
aux adultes responsable. Si la chaudière
n’est pas operé proprement, elle risque d’être endommagé et la
garantie serait annulé.
Ne jamais permettre aux enfants de jouer a
proximité ou de toucher la chaudière. Gardez
toujours les alentours et l’avant de la porte propre et sans
materiaux combustibles.
Ne pas connecter cette unité à une chemine
utilisé par un autre equipment.
Faites atteution à vos mains et doigts en
mettantleboisaufourand’éviterdeles 
coincer eutre le bois et les bords de la porte.
All installation and operations must follow
STATE and LOCAL CODES for wiring,
plumbing,andringofthisunit.These
CODES may differ from this manual. Installa-
tion must be performed by a QualiedInstaller.
Read and follow these directions carefully.
Retain this manual for as long as you own your
WoodMaster.
All WoodMaster models operate at atmospheric
pressure. DO NOT obstruct, block, or plug
inanywaytheoverowventpipewhichis
located directly behind the chimney on top of
the furnace.
The WoodMaster is designed for outdoor use.
We do not recommend installing in a building.
Manufacturer recommends a minimum 25
footclearancefrombuildingsorrehazards.
Ifplacedneararehazardareaanapproved
spark arrester should be used.
Only responsible adults should operate your
furnace.Iffurnaceisnotredproperlydam-
age could result and the warranty be voided.
Never allow small children to play near or
tamper with furnace. Always keep the area
around, and in front of fuel door clean and free
from combustible materials.
Donotconnectthisunittoachimneyueserv-
ing another appliance.
Load Wood Carefully to avoid injury to hands
andngersthatmaycomeintocontactwith
furnace opening.
Pump must run continuously whenever the
WoodMaster is being used.
Cut split seasoned wood is the recommended
fuel. (approximately 25% moisture or less)
Safety
IMPORTANT SAFETY
INSTRUCTIONS
READ ALL INSTRUCTIONS
BEFORE INSTALLATION
Pre-Installation Precautions

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Features
Front View
Rear Panel
Chimney
Vent Pipe
Fuel Door
E.T.C. System
(Electronic Temperature Control)
Optional
Ash Auger Port
Draft
Fan Assembly
(Inside Shroud)
BafeBypass
Operating
Instructions
HeatBafe
Instructions
Utility Light
Hanger Strap
Serial /Model Number
Main Power
Junction Box
Furnace Drain
Hot Water
Supply Valve
Cold Water
Return Valve
Cold Water
Return Valve
Hot Water
Supply Valve
(4400 shown)

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CAUTION!!!
Using a non-insulated chimney or failure to use a Class A Insulated
Chimney WILL result in a voided warranty
Installation
THE FURNACE
Choosing Location
The WoodMaster is designed for outdoor use. We do not recommend installing in a building. When installing your WoodMaster,
keep in mind the direction of the winds during heating months. Try to place the furnace in an area where exhaust will not be a
problem for yourself or any surrounding neighbors.
Chimney Specications
To insure proper insulation, use only a Class A Insulated Chimney and Chimney Adapter from your local WoodMaster Dealer or
Northwest Mfg., Inc.
Block or Pad Supports
Under normal conditions four cement blocks are all that is required to support the furnace. Blocks should be at least 6 inches
wide, 10 inches long, and 3 inches thick. Under very soft conditions a concrete pad may be needed. For Model 4400 the pad
should be no less than 5 feet wide, 6 feet long, and 4 to 6 inches thick. For Model 5500 no less than 6 feet wide, 7 feet long, and
4 to 6 inches thick. Always use a non-combustible base. For model specic Slab Dimensions, see page 21 in this manual.
Trench
The trench must be 24 inches deep and 6 to 12 inches wide. It can be dug with a shovel or a backhoe. Place all the dirt to one side of
the trench to allow room for working on the other side.
Wiring
Place electrical supply in bottom of trench and cover with 6 inches of dirt. Electrical wire rated for underground use (14-2 +ground
or 12-2 + ground for the 6500) can be buried in the same trench as the water lines but must maintain a minimum 24 inch depth. Al-
ways follow state and local codes.
Water Lines
The remaining 18 inches of open trench is where the water lines are placed. Use a one inch water line with a minimum rating of 100
PSI at 180 degrees and insure that your water line insulation has a minimum R-value of eight in order to maintain adequate heating
efciency.
NOTE: If lines travel under a driveway or where heavy equipment travels, the line should be buried two to three feet deep. If lines
travel through a low or wet area, they should be insulated and installed in a water tight piping, (PVC).
NOTE: Leave a minimum of three feet of water line exposed above ground at the furnace to insure adequate length for connection.
NOTE: Before insulating and burying the water lines, label the hot water supply line at both ends. Once the lines are covered you
will be able to easily determine which line is connected to the pump.
NOTE: Use only approved water line insulation sold through your WoodMaster Dealer. Poor insulation will cause your WoodMaster
furnace to burn large amounts of wood.
CAUTION!!!
Call Before you dig.

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Caution!!
Never run the pumps dry!! The furnace must
be full of water and the valves must be open.
Installation
THE FURNACE
1” Cast Iron Pump Flange
Pump
Hooking Up Water Lines
Hot Water Supply
Attachthe1”Pexx1”MIPtting(0020-140)toFlangeonbottom
of the Pump. Then attach the hot water supply 1” Pex Water Line
(0020-130)tothettingusing1”PexCrimpRing(0020-145).
Cold Water Return
Attachthe1”Pexx1”MIP(0020-140)ttingtotheColdWaterReturn
Valve on the same side of the furnace on which the Pump was attached.
Then attach the cold water return 1” Pex Water Line (0020-130) to the
ttingusing1”PexCrimpRing(0020-145).
Note: A 1” male Sharkbite Adapter (0020-510) may be substituted for
the0020-140&0020-145.
Wiring The Pump
Remove the cover on the Pump. Then using an approved wire, connect the
Ground Wire to the Green Ground Screw on the Pump. Connect the Black
Wire to the Yellow Wire on the Pump. Finally, connect the remaining two
White Wires together and replace the Pump Cover.
Locate Junction Box on back of furnace and remove the cover. Connect the
running end of the approved wire coming from the Pump to the Junction.
NOTE: The Wires from the Pump will have to connect with the Main Power
Wires in the Junction Box along with the Power Wires from the ETC System.
Black Rubber Gasket
(Supplied with pump)
Hot Water Supply Valve
Black Rubber Gasket
(Supplied with pump)
Hot Water Supply
(On back of furnace)
Direction of Flow
Indicator Arrow
Mounting the Pump
Attach the 1” x 2” Black Nipple (0020-250) and one half of the
Flanges from the 1” Cast Iron Pump Flange Kit (0020-368) to one
of the Hot Water Supply Valves on back of furnace.
Locate one of the Black Rubber Gaskets, and place it between the
Pump and the Mounted Flange, bolt the Pump to the Flange. Make
surethearrowonthepumpindicatingdirectionofwaterow
points down.
Bolt the remaining Flange and Gasket to the bottom of the Pump.
NOTE: Make sure that the pump is attached to the supply
line, not the return.
1” Pex Crimp x 1” MIP
(0020-140)
1” Pex Water Line
(0020-130)
1” Pex Crimp Ring
(0020-145)
Caution!!
The pump must run continuously whenever the
Woodmaster Furnace is in use. It cannot be
wired to thermostats that only run the pump
when the building calls for it.
Caution!!
Disconnect power before servicing
any electrical components.
Hot Water
Supply Valves
Cold Water
Return Valves
4400 (pictured)

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Installation
THE HOME
Domestic Hot Water
The Domestic Hot Water/Flatplate Kit consists of a Water
toWaterHeatTransferunitandthettingsneededtohook
it up. The unit mounts on the wall VERTICALLY in your
utility room and is connected as shown below.
Entering the building with water lines can be done underground or over the sill plate. Once inside the building the typical hookup
wouldrunrsttotheDomesticHotWaterSupplyandnexttoanexistingheatingsystemsuchasaforcedairfurnaceorahotwa-
terheatingsystem.Finally,beforeleavingthebuilding,allvalvemustbeinstallednearenoughtoawatersupplyforllingand
ushingtheboilerintheWoodMasterfurnace.
Existing Forced Air
A water to air heat exchanger is inserted in the existing plenum. In most cases
the heat exchanger is placed in a horizontal position, keeping all four sides level.
Theairmustbeforcedthroughthennedareaoftheheatexchangerevenly.The
hotwaterlinecomingfromthehot-watertubeentersthebottomttingoftheheat
exchangerandexitsthetoptting,whichreturnstothefurnace.Iftheplenumis
toolargeortoosmall,itmustbealteredtottheheatexchangerproperly.
NOTE: The WoodMaster Plus Water to Air Heat Exchanger must be 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
owmayneedtobeincreasedtofuelfurnaces,electricfurnaces,andelectric/gas
furnaces. Methods of doing this are:
Belt Drive System
Blowerpulleysandmotorpulleysmaybechangedbuttheelectriccurrentow-
ing through the motor shall not exceed the nameplate rating. (A blower motor or
larger power may be used.)
Direct Drive System
The motor shall not be changed, however the speed of the motor may be in-
creased.
The heat exchanger works on the same princi-
pal as your car heater. Air blows through the
heat exchanger, taking the heat from the water
and blowing it into your existing duct work.
Hot Water Supply from WoodMaster Plus
(Always put supply in lower port.)
Cold Water Return to
WoodMaster Plus
Caution!!
All wiring must follow state and local codes and should be done by
a qualied electrician. Wire thermostats according to directions
provided by the manufacturer.
WoodMaster
water in
WoodMaster
water out
Domestic Cold
Water in
Domestic Hot
Water out

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Installation
Existing Hot Water Heat
A Water to Water Heat Transfer Unit (0020-052) is used to connect to an existing hot water boiler system.
NOTE: Any changes that are made to an existing boiler
shouldbedonebyaqualiedplumberandfollowallstate
and local codes.
The Inline Filter and Fill Valve Assembly (0020-275) must be installed in the Cold Water
Return Line before the line exits the building. It should be placed so that a garden hose can
be connected between a domestic water supply and the Fill Valve.
Inline Filter and Fill Valve Assembly
Hot Water Supply from
WoodMaster Plus
Cold Water Return to
WoodMaster Plus
Existing Heat
Zone Return
WoodMaster Water to
Water Heat Transfer Unit
Circulating Pump
for Existing Hot
Water Heating
System
Existing Hot
Water Boiler
Cold Water Return from
Heat Exchanger
Domestic Water
Supplyforlling
boiler
Cold Water
Return to
WoodMaster Plus
Auger Assembly
Place the auger carriage in the furnace, insert the
center auger through the auger tube and align with
the stub shaft on the back of the carriage.
Place the auger cap over the auger tube and align the center auger
shaft with the hole in the auger cap. The Auger cap should com-
pletely slide on tube. If this does not happen, the center auger is not
all the way on stub shaft. Rotate auger, while pushing in, to insure
the cap and auger are installed properly. Tighten the auger cap.
Insert the grate and place over
the top of auger carriage.
NOTE: The Ash Auger and grate
must be removed after each
heating season for cleaning and
maintenance .