Wood master CleanFire 700 User manual

OWNER’S MANUAL
SAVE THESE
INSTRUCTIONS
(p/n 9000752) - JUN 2020
WARNING: If the information in this manual is not followed exactly, a re or explosion may result causing property
damage, personal injury or loss of life.
– Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any other appliance.
– WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch.
• Immediately call your gas supplier. Follow the supplier’s instructions.
• If you cannot reach your gas supplier, call the re department.
– Installation and service must be performed by a qualied installer, service agency or the gas supplier.
OUTDOOR WOOD FURNACE
0117WB036S
0117WB039E
CLEANFIRE 700
CLEANFIRE 500
CLEANFIRE 300

WoodMaster, Inc. • 20502 160th Street • Greenbush, MN 56726
WoodMaster.com
For parts and accessories, service or repairs, call your authorized WoodMaster dealer or heating contractor. Record
the information below for future reference.
Model Serial Number Installation Date
Dealership Name Phone Number
Owner Name
The CleanFire outdoor hydronic heater by WoodMaster is listed by OMNI-Test Laboratories to the applicable portions of the
following standards: UL 2523-2018 Solid Fuel-Fired Hydronic Heating Appliances, Water Heaters and Boilers, CAN/CSA B415.1-10
(R2015) Performance Testing of Solid-Fuel-Burning Heating Appliances, CSA-B366.1-11 (R2015) Solid-Fuel-Fired Central Heating
Appliance, ASTM E2618-13 Standard Test Method for Measurement of Particulate Emissions and Heating Efciency of Solid
Fuel-Fired Hydronic Heating Appliances, ASTM E2515-11 Standard Test Method for Determination of Particulate Matter Emissions
Collected by a Dilution Tunnel.
The CleanFire includes two 4-foot stainless steel insulated chimney sections (8" in diameter, p/n 10508 - CleanFire 700). Use only
stainless steel solid fuel chimneys specied by WoodMaster. Maximum draft is marked on nameplate.
French Owner's Manual is available upon request from your dealer
(Manuel d'installation en français disponible sur demande auprès de votre revendeur)
CleanFire 700 Annual Efciency Rating*: 89.8% (lower heating value), 83.4% (higher heating value)
Manufacturer's Rated Heat Output Capacity: 245,000 Btu/hr | Range**: 0 to 235,938 Btu/hr.
Water Capacity: 330 gal. | Weight: 2,186 lbs
CleanFire 500 Annual Efciency Rating*: 90.2% (lower heating value), 83.8% (higher heating value)
Manufacturer's Rated Heat Output Capacity: 200,000 Btu/hr | Range**: 0 to 194,724 Btu/hr.
Water Capacity: 205 gal. | Weight: 1,668 lbs
CleanFire 300 Annual Efciency Rating*: 88% (lower heating value), 82% (higher heating value)
Manufacturer's Rated Heat Output Capacity: 150,000 Btu/hr | Range**: 0 to 148,625 Btu/hr.
Water Capacity: 150 gal. | Weight: 1,460 lbs
*Performance is a product of the combustion rate, combustion efciency and heat exchange efciency with a single fuel load
without refueling. Results vary based on wood species, wood quality, wood quantity and moisture content. Efciencies are
determined under the same test conditions using higher heating value, lower heating value and annual fuel utilization efciency
(AFUE).
• This heater meets the 2020 U.S. Environmental Protection Agency's cord wood emission limits for wood heaters sold after May 15, 2020.
Under specic test conditions this heater has been shown to deliver heat at rates shown for the respective model above**.
• This wood heater has a manufacturer-set minimum low burn rate that must not be altered. This wood heater needs periodic inspection and
repair for proper operation. It is against federal regulations to operate this wood heater in a manner inconsistent with operating instructions
in this manual.
• DO NOT OVERFIRE THIS HEATER. Attempts to achieve heat output rates that exceed heater design specications can result in permanent
damage to the heater.
• Any person(s) operating a hydronic heater must comply with all applicable laws, including but not limited to local ordinances.
• Improper use or failure to maintain the hydronic heater may cause nuisance conditions. The person(s) operating a hydronic heater is/
are responsible for operation in a manner that does not create a nuisance condition. Meeting the setback distance and stack height
recommendations from the manufacturer and requirements in applicable State and local regulations may not always be adequate to prevent
nuisance conditions in some areas due to terrain or other factors.
• Operating an outdoor furnace may not be suitable to some individuals' abilities or lifestyles. Be sure to review the Owner's Manual for the
appliance with your dealer.
- Register at time of purchase for FREE 25 Year Limited Warranty -
Verify your warranty and check status of water samples at: WoodMaster.com/w25

Contents
How to Use This Guide
The guide is divided into
sections to help with the
operation and maintenance
of the outdoor furnace. If
questions arise that are not
answered with this manual,
consult with your authorized
WoodMaster dealer.
Woodmaster Online Resources ........................................ Iv
EPA Resources ..................................................... Iv
Labeling And Terminology .............................................1
Important Precautionary Information .............................. 2
Foundation .........................................................4
Access to Ports on Outdoor Furnace .....................................5
Ground Rod Kit ......................................................7
Furnace Installation - Connecting to Your Existing System ....................7
Outdoor Wood Furnace Best Burn Practices ...............................9
Chimney Recommendations............................................9
Chimney Installation..................................................9
Water Quality and Maintenance.................................. 12
Initial Water Treatment, Fill and Testing..................................12
Water Samples .....................................................13
Water Sample Kit ...................................................13
When to Submit Water Sample.........................................13
System Maintenance ................................................14
Water Test Kits and Test Results .......................................14
Post Heating Season Maintenance .....................................15
Flushing The System ................................................15
Wood Selection and Preparation ................................. 17
Operating Instructions ........................................ 18
Firestar Combustion Controller ........................................18
How the Cleanre Works .............................................18
Cold Start Firing ....................................................20
Adding Heat Load...................................................22
Ash Removal Frequency..............................................22
Adding Wood ......................................................22
Maintenance Schedule ........................................ 27
Control Locations...................................................28
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Maintenance Sections ...............................................29
Serviceable Items............................................ 41
Firebox Door Hinge / Latch Bearing Adjustment ...........................41
Firebox Door Seal...................................................41
Reaction Chamber Door Seal ..........................................43
Heat Exchanger Door Seal ............................................44
Circuit Breaker .....................................................45
Airbox Seal ........................................................46
Air Tube and Refractory Modules .......................................47
Thermocouple .....................................................48
Heat Exchanger Door Insulation........................................49
Heat Exchanger Access Cover Insulation.................................50
Combustion Air Tube / Front Air Channel.................................51
Troubleshooting ............................................. 53
General Information .......................................... 62
Wiring Diagram.............................................. 63
Water Sample Information - Cleanre Models ....................... 64

CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
INSTALLATIONS IN MASSACHUSETTS:
1. All installation components must be products approved in the Commonwealth of Massachusetts by the Gas and Plumbing Board.
2. The maximum run of tubing from the water heater to a fan coil is 50 linear feet.
3. Persons operating this hydronic heater are responsible for operation of the hydronic heater so as not to cause a condition of air pollution
as dened in 310 CMR 7.01(1).
EPA RESOURCES
EPA's Burnwise Program - https://www.epa.gov/burnwise
How to Use a Moisture Meter Video - http://www.youtube.com/watch?v=jM2WGgRcnm0
EPA offers tips on how to properly use a moisture meter to test rewood before using in a wood-burning stove or
replace. Wet wood can create excessive smoke which is wasted fuel.
Split, Stack, Cover and Store Video - http://www.youtube.com/watch?v=yo1--Zrh11s
EPA offers four simple steps to properly dry rewood before using in a wood-burning stove or replace. Wet wood
can create excessive smoke which is wasted fuel. Burning dry, seasoned rewood with a moisture content of 20% or
less can save money and help reduce harmful air pollution.
Resources to Help Burn Wood the Right Way - https://www.epa.gov/burnwise/resources-help-you-burn-wood-right-
way-and-promote-burn-wise-program. Find tip sheets, brochure and yers, and more information.
NOTE: The warranty can be voided by operating a residential hydronic heater in a manner inconsistent with the Owner's Manual.
WOODMASTER ONLINE RESOURCES
Visit WoodMaster.com for information to help with installation, operation and maintenance of your WoodMaster
outdoor furnace. Explore videos, download owner's resource materials and more.

1
CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
Labeling and Terminology
The outdoor furnace and this installation guide use the following terms and
symbols to bring attention to the presence of hazards of various risk levels
and important information concerning the use and maintenance of the
outdoor furnace.
This symbol and text indicate an imminently hazardous situation which, if ignored,
will result in death or serious injury.
This symbol and text indicate the presence of a hazard which can cause severe
personal injury or death to an operator or bystander, or substantial property
damage if ignored.
CAUTION
This symbol and text indicate the presence of a hazard which can cause minor
personal injury or property damage if ignored.
NOTE: Indicates supplementary information worthy of particular attention relating
to installation, operation, or maintenance of the outdoor furnace but is not related to
a hazardous condition.
Be sure to follow all instructions and related precautions as they are meant
for your safety and protection. Store this manual in a readily accessible
location for future reference.
- Measurement (G) includes two 4 ft (1.2 m) chimney sections.
- All measurements are approximate
- Measurement (F) is from firebox door to chimney inspection cover.
I
DG
E
B
A
H
F
C
CleanFire 700 Measurements
A B C D E F G IH
cm
in. 51 84.75 59.75 53.5 60.5 5 3979 164
130 215 152 136 154 13 99201 417
CleanFire 500 Measurements
A B C D E F G IH
cm
in. 42.5 76 55.5 45 56 5 37.573.5 151
108 193 141 114 142 13 95187 384
CleanFire 300 Measurements
A B C D E F G IH
cm
in. 40.5 72 50.75 43 51.5 5 3869 150
103 183 129 109 131 13 97175 381

2CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
Important Precautionary Information
Be sure to read carefully and understand these precautions before, during and after the installation, operation and
maintenance of the furnace.
NOTE: All operations must be in accordance with local and state
codes which may differ from the information in this manual.
CAUTION
This outdoor furnace is not intended to be the only source of
heat. In the event of a prolonged power failure, a generator
may be used to prevent lines from freezing. Should the
outdoor furnace be left unattended, run out of fuel or require
service, an alternate heating source in the building being
heated should be in place to prevent damage caused by
freezing.
This outdoor furnace and/or chimney is not intended or
safety tested to be used or installed in a building where
contents of that building could be damaged or where a
nancial loss could occur from smoke, soot, re or water.
The outdoor furnace vent cap must t loosely on the vent
opening. Do not force the cap down or try to seal it tightly
onto the vent pipe. Do not extend or restrict the vent pipe
or opening. DO NOT ALLOW THE OUTDOOR FURNACE TO BE
PRESSURIZED.
REMOVE STRAPPING FROM
VENT BEFORE FILLING
WITH WATER.
Vent Cap Must
Fit Loosely
Be sure the outdoor furnace is lled with water before ring.
Never re the outdoor furnace when the water level is more
than 1" (2.5 cm) below the FULL mark on the sight gauge.
MolyArmor 350 must be added before the initial ll (see
Water Quality and Maintenance).
Disconnect the electrical power to the outdoor furnace
before replacing an electrical component.
Do not attempt service inside the electrical control panel
without rst disconnecting the electrical power at the main
power source.
NOTE: Any electrical installation should be done by a qualied
installer in accordance with applicable codes.
Allow the outdoor furnace to thoroughly cool and completely
clean out the rebox before draining water from the outdoor
furnace. If the water in the outdoor furnace ever boils, be
sure to check the water level and restore to full. If water is
added, the proper level of MolyArmor 350 (p/n 2900631)
must be maintained.
When cleaning the outdoor furnace, be careful not to spill
any coals.
ALWAYS store ash in a covered non-combustible container.
Do not allow combustible materials (straw, hay or wood)
near the outdoor furnace. Keep the perimeter of the outdoor
furnace clear and clean.
For re safety, keep all combustible materials at least six
feet (two meters) away from the outdoor furnace, especially
around the door area. Debris of wood chips and other
combustibles in the area may be easily ignited if a hot coal
is spilled out of the rebox and left unnoticed.

3
CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
The rebox door must be closed and latched at all times
except when lling the rebox with wood. Leaving the
rebox door open may lead to a runaway re. In the event
of a runaway re, close the rebox door. In the event of a
chimney or soot re, close the rebox door and make sure
power is off to the outdoor furnace.
All covers must be maintained at all times except during
maintenance, inspection and service.
When opening the rebox door, the door switch will shut off
the primary air actuator motor while the rebox door is open.
Do NOT disable the door switch.
NOTE: The prohibition against burning these materials does not
prohibit the use of re starters made from paper, cardboard,
saw dust, wax and similar substances for the purpose of
starting a re in an affected wood heater.
NOTE: Do not use chemicals or uids to start the re. Use
kindling or gas-red wood ignition option to start an initial re.
NOTE: The sight gauge valve should always be closed, except
when checking water level. Water will automatically drain from
the sight gauge tube when the valve is closed. Remember that
this type of valve requires only 1/4 turn to open or close.
This heater is designed to burn natural wood only. DO NOT
BURN: unseasoned wood, treated wood, colored paper,
cardboard, trash or garbage.
NOTE: Chloride or sulfurous gases can be generated if plastic
or rubber is burned and will mix with the moisture from the
wood and form hydrochloric or sulfuric acids in the rebox,
creating corrosion.
NOTE: This outdoor furnace is not to be used with an automatic
stoker.
CAUTION
This outdoor furnace is not to be connected to a chimney
ue serving another appliance.
When adding wood to the rebox, be careful not to get
pinched between the wood and the door frame, or any part of
the outdoor furnace. Use extreme care with large pieces of
wood that may be difcult to handle.

4CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
Refractory/Chimney
Tee Cleaning Tool
Do not use any combustible
materials for the foundation.
CAUTION Outdoor furnace must be installed on a noncombustible surface or foundation that incorporates an enclosure that will
prevent supply and return lines from possible exposure to sunlight, fire, or physical damage that may be caused by an
occurrence outside the outdoor furnace enclosure. Foundation may consist of concrete, crushed rock, or patio blocks.
CleanFire 700
(Foundation Optional)
59.75"
(152 cm)
51"
(130 cm)
7"
(18 cm)
11"
(28 cm)
Front
28"
(71 cm)
CleanFire 500
(Foundation Optional)
55.5"
(141 cm)
42.5"
(108 cm)
7"
(18 cm)
8"
(21 cm)
Front
24"
(61 cm)
CleanFire 300
(Foundation Optional)
50.75"
(129 cm)
40.5"
(103 cm)
7"
(18 cm)
8"
(21 cm)
Front
23"
(59 cm)
Maintenance Tool
Cleaning Rod
Tools
Included with each new furnace
are tools that are invaluable for
maintenance and cleaning. Use
the maintenance tool to clean the
rebox and to remove ash from the
Reaction Chamber. The maintenance
tool is also used for cleaning the
rebox and door frame. The cleaning
rod can be used to break up heavy or
solidied ash in the rebox. It is also
used to clean the heat exchangers.
The Refractory/Chimney Tee
cleaning tool is used to clean ash
from the Reaction Chamber and to
clean the chimney tee.
Refer to the Maintenance section for
more information.
Foundation
The outdoor furnace may be installed directly on stable, level ground without
the necessity of a foundation, although installing the outdoor furnace on
a foundation offers many advantages. The outdoor furnace is less likely
to move due to frost heaving. A foundation keeps the area directly around
the outdoor furnace free of standing water and can help to keep unwanted
pests out. It can also raise the furnace up to provide a more comfortable
height of the rebox door opening.
If the ground is unstable, one option is to use patio blocks under the
perimeter of the base. Another option is to pour a concrete foundation.
To install the outdoor furnace on a concrete foundation, refer to the
illustration for dimensions and for the location of the hollowed-out area
for each model. A 4" to 6" (10 to 15 cm) thick concrete slab works well;
however, a thicker slab may be used to obtain the desired door opening
height.
If the area for the concrete slab is unstable and/or affected by frost heaving,
consider installing 2" closed-cell insulation beneath the front portion of the
slab and under the area of the ground used for walking.
CAUTION
Do not use any combustible materials for the foundation.
NOTE: The installation surface or foundation must be noncombustible. The hot supply
and return lines must also be protected from possible exposure to sunlight, re or
physical damage that may be caused by an occurrence outside the outdoor furnace
enclosure. Foundations may consist of concrete, crushed rock or patio blocks.

5
CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
Access to Ports on Outdoor Furnace
Ports are provided that allow mounting circulation pumps on the outdoor
furnace. Refer to the illustrations in this section for proper supply and return
line and pump installations for your model.
NOTE: The Installation Guide provides more information on pump selection. For even
more detailed information, see the Hydronic Component Selection Guide (p/n 2482),
available from your WoodMaster dealer.
Qty p/n Description
3 5800033 0015e3 Pump
2118 Close Nipple, 3/4"
2224 Isolation Flange Kits, 3/4"
2198 Ball Valve, 3/4"
2296 Swing Check Valve, 3/4"
2274 90° Street Elbow, 3/4"
45926
Crimp Ring, 1"
Stainless Steel Clamp
3 - Pump Parts List*
3556 Power Supply Cord, 32"
1582 6 Outlet Converter
4 1330 MPT to PEX, 3/4" x 1"
15000015 Nipple, 1-1/4" x 2-1/2
3536 Nipple, 3/4" x 7"
1 6593 Grounding Rod Kit
2 409 Close Nipple, 1-1/4"
1411 90° Street Elbow, 1-1/4"
2 5643 Brass Clamp, 1-1/4"
1 410 Ball Valve, 1-1/4"
1 225 Isolation Flange Kits, 1-1/4"
1 5871 Swing Check Valve, 1-1/4"
*Parts and accessories sold separately.
Pump size may vary. NOTE
Grounding Rod Kit (p/n 6593) must
be installed with every furnace.
For illustration purposes only.
118
5800033
198
536
225
296
409
410
5871
411
556
6593
582
274
1330
5643
5926
1-1/4"
PEX
1" Central
PEX
224
CleanFire 700 Model – 3-Pump Conguration

6CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
118
5800033
198
224 296
5000015
418
388
6593
1330
118
5926
1" Central
PEX
956
534
556
*Parts and accessories sold separately.
Pump size may vary. For illustration purposes only.
NOTE
Grounding Rod Kit (p/n 6593) must
be installed with every furnace.
SUPPLY RETURN
Qty p/n Description
2 5800033 0015e3 Pump
4118 Close Nipple, 3/4"
2224 Isolation Flange Kits, 3/4"
2198 Ball Valve, 3/4"
2296 Swing Check Valve, 3/4"
2536 Nipple, 3/4" x 7"
4388 Hex Bushing, 1-1/4" x 3/4"
45926
Crimp Ring, 1"
Stainless Steel Clamp
2 - Pump Parts List*
2556 Power Supply Cord, 32"
41330 MPT to PEX, 3/4" x 1"
111157 Nipple, 1-1/4" x 3"
25000015 Nipple, 1-1/4" x 2-1/2"
25000016 90° Elbow, 1-1/4" FPT
1 6593 Grounding Rod Kit
1 409 Close Nipple, 1-1/4"
2 418 Tee, 1-1/4"
*Parts and accessories sold separately.
Pump size may vary.
For illustration purposes only.
NOTE
Grounding Rod Kit (p/n 6593) must
be installed with every furnace.
5800033
198
118
388
536
296
556
6593 1330
5926
1" Central
PEX
SUPPLY
224
Qty p/n Description
1 5800033 0015e3 Pump
2118 Close Nipple, 3/4"
1536 Brass Nipple, 3/4" x 7"
1198 Ball Valve, 3/4"
1224 Isolation Flange Kit, 3/4"
1 296 Swing Check Valve, 3/4"
2388 Hex Bushing, 1-1/4" x 3/4"
25926
Crimp Ring, 1"
Stainless Steel Clamp
1 - Pump Parts List*
1556 Power Supply Cord, 32"
21330 MPT to PEX, 3/4" x 1"
1 6593 Grounding Rod Kit
RETURN
*Pump Extension Kit (p/n 2500164) required.
CleanFire 300/500 Models – 2-Pump Conguration*
CleanFire 300/500 Models – 1-Pump Conguration

7
CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
Ground Rod Kit
The outdoor furnace must be electrically bonded to ground in accordance
with the requirements of the authority having jurisdiction or, in absence of
such requirements, with the National Electrical Code, ANSI/NFPA 70 and/or
the Canadian Electrical Code Part 1, CSA C22.1 Electrical Code.
Install a Ground Rod Kit (p/n 6593) and connect it to the outdoor furnace.
1. In the water line trench near the outdoor furnace, drive the ground rod
into the ground until the top of the ground rod is below the ground
surface.
2. Route the ground wire from the ground rod under the outdoor furnace
base and over to the frame of the outdoor furnace.
3. Secure the ground terminal with a cap screw (1/4" x 3/4"), star washer
and nut. Secure the ground wire to the terminal; then secure the ground
wire to the ground rod with the clamp. Tighten all hardware securely.
NOTE: A hole for the ground terminal has been pre-punched in the outdoor furnace
base near the pumps.
Furnace Installation - Connecting to Your Existing
System
A common installation is to connect the outdoor furnace to an existing
water heater and then to an existing forced air system. A water-to-air heat
exchanger is mounted in the plenum or duct work of the existing furnace.
Heated water from the outdoor furnace either continuously ows through
the water-to-air heat exchanger or is diverted through a 3-way zone valve.
When the thermostat senses the need for heat, the fan on the existing
furnace forces air through the heat exchanger, transferring heat throughout
the existing ductwork.
NOTE: There are numerous ways to connect to your heating system. Refer to the
Outdoor Furnace Installation Guide for other installations.
Detailed Furnace Installation
Variations
Visit WoodMaster.com to
access a library of detailed
illustrations for connecting to a
wide variety of existing heating
systems and for other heating
options.

8CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
H
C
M
R
Hot Supply
Water-to-Water
Heat Exchanger
Bypass Line
Thermostatic
Mixing Valve
This horizontal assembly
must not exceed a height
of 4 inches (10 cm) above top
of water heater.
Existing
Water
Heater
1"
Central
PEX®
Optional Bypass
Valve
Heat
Exchanger
Plenum
Existing
Forced Air
Furnace
For illustration purposes only,
water heater styles may vary.
NOTE
A pump must be installed in the hot
supply line between the outdoor furnace
and thermostatic valve. Outdoor furnace
water temperature setpoint should be
set at 185˚F (85˚C) minimum.
NOTE
Installer must comply with all
applicable codes and regulations.
NOTE
Any electrical installation should
be done by a qualified installer
in accordance with applicable
codes.
NOTE: A certified electrician must
do the electrical installation.
Typical Installation
Connecting to Water Heater and Forced Air Furnace
Hot Supply from Pump
on Outdoor Furnace
Return to Outdoor Furnace
Optional Thermostatic Valve
To Heating
System
From Heating
System
Hot Supply from Pump
on Outdoor Furnace
Return to
Outdoor Furnace
Remote
Thermal
Storage
Tank
For illustration purposes only;
system components may vary.
NOTE
Installer must comply with all
applicable codes and regulations.
Remote Thermal Storage Installation
Connecting to Remote Thermal Storage Tank

9
CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
Chimney Recommendations
In higher populated areas, extend the chimney to a height above the roofs
of surrounding buildings. Use WoodMaster Chimney Extensions when
extending the chimney. When only the standard eight feet (2.4 m) of
chimney are used, the sections must be secured at the connection joint with
four (4) screws to stabilize the extension.
Chimney Installation
NOTE: Instructions for installing chimney sections and the chimney brace assembly
are also provided with the furnace.
1. Remove the two slotted hex screws securing the Chimney Slide to the
Chimney Support.
2. Remove the six self-tapping screws from the slot in the Chimney Brace
Support. These screws are used to assemble the chimney sections.
3. Remove the single slotted hex screw securing the Chimney Strap to the
Chimney Brace Support.
4. Install the rope seal at the bottom of the rst chimney section; then
assemble the chimney as shown.
5. Mount the Chimney Slide to the Chimney Support with two slotted hex
screws. Do not tighten completely to allow the Chimney Slide to move.
6. Level the chimney front to back; then position the Chimney Slide
against the chimney and completely tighten the two slotted hex screws.
7. Wrap the Chimney Strap around the chimney and secure with a slotted
hex screw.
8. Secure the base of the chimney and the joint between the rst two
chimney sections with three self-tapping screws.
Outdoor Wood Furnace
Best Burn Practices
1. Read and follow all operating
instructions supplied by the
manufacturer.
2. FUEL USED: Only those listed
fuels recommended by the
manufacturer of your unit.
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, paper
products, and cardboard.
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.
5. CHIMNEY
RECOMMENDATIONS: In higher
populated areas, extend the
chimney to a height above the
roofs of surrounding buildings.
6. Always remember to comply
with all applicable state and
local codes.
Be considerate of neighbors when
operating your furnace. If you
use your furnace in the summer
months, be certain your chimney
exhaust is not adversely affecting
neighbors with open windows.

10 CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
Chimney
Sections
Turn Clockwise to Lock
Chimney Section Installation
and Chimney Brace Assembly
Turn Clockwise
to Lock
Clamp
Clamp
No Rope
Seal Needed
Rope Seal
Use silicone to install the
rope seal in the chimney.
Illustration for reference only.
Refer to instructions provided with
furnace for more information.
Chimney Slide
Chimney Support
Chimney Strap
Rope Seal
Chimney Tee

11
CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
Chimney
Guy-Wire
Band Kit
(p/n 778)
Fall Zone
If objects are placed in the fall zone of the chimney, a
Chimney Guy-Wire Band Kit (p/n 778) or additional bracing
is recommended.
CleanFire 700 -
8" Chimney Locking
Band (p/n 10509)
Chimney
Base
Bracket
(p/n 4519)
CleanFire 700 -
8" Chimney Extension (p/n 10508)
Additional bracing may be necessary in
certain areas such as those subject to severe
weather, winds, freezing rain, etc.
Inspect all bracing bi-annually for integrity.
•
•
NOTE
Five or More Sections
When five or more sections of
chimney are being used, a Chimney
Base Bracket Kit (p/n 4519) and a
Chimney Attachment Ring (p/n 774)
are recommended.
Chimney Attachment Ring (p/n 774)
Must be located directly below Chimney
Locking Band to reduce stress on the
joint.
Two 1" electrical
conduit sections
(not supplied)
Two 3/4"electrical
conduit sections
(not supplied)
Three or Four Sections
When three or four sections of
chimney are being used, aChimney
Base Bracket Kit (p/n 4519) is
recommended.
Chimney Reinforcement Recommendations
If extensions are added to the standard eight feet (2.4m) of chimney, the
chimney should be reinforced appropriately. The illustration shows chimney
support recommendations when three or more sections are used. When adding
sections of chimney, make sure that there is nothing within the fall zone of
the chimney that could be damaged. If something is located within the fall
zone and cannot be removed, guy wires or braces may need to be installed to
prevent a falling chimney from causing damage.
NOTE: If more than three 4-foot (1.2-m) sections of chimney are used, a support (e.g., a pole,
pipe or other structural support) may be installed from the ground that can withstand wind.
Other reinforcement recommendations are shown.
NOTE: For chimney extensions or chimney replacement, use only genuine WoodMaster
chimney components. Parts are available from an authorized WoodMaster dealer.
The installation of a spark arrestor is recommended, particularly where there
are dry conditions or where there is combustible material near the unit, unless
the installation of a spark arrestor is prohibited by local requirements.
NOTE: If the screen is left on the chimney cap, the spark arrestor should be inspected
and cleaned as needed.
Use common sense to avoid potential res, including exercising caution
when disposing of ashes, cleaning and refueling. Keep all highly combustible
materials (e.g., gasoline, propane, leaves, pine needles, etc.) away from an
operating unit at all times. Take special precautions in windy conditions.
NOTE: You may need to increase the chimney height if conditions occur that force
exhaust to low levels.

12 CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
WATER QUALITY AND MAINTENANCE
Adding Antifreeze to Outdoor Furnace System
Most outdoor furnaces are installed without antifreeze when an existing
heating system is in place and there is no anticipation of leaving the outdoor
furnace unattended for extended periods of time (10 days or more). If the
building being heated has an alternate heat source, system water may be
kept from freezing by running the circulating pump(s) and drawing heat
from the existing furnace or boiler in the home or building.
To prevent freezing if the outdoor furnace is not red for extended time
periods or if lengthy power outages are anticipated during cold weather,
a nontoxic propylene glycol may be used in the system. Some types of
antifreeze that contain various inhibitors have been known to create
problems like coagulation and jelling. To prevent potential problems, do
not use propylene glycol that is premixed with inhibitors. MolyArmor 350
is compatible with (raw) propylene glycol. It is important to use MolyArmor
350 with straight propylene glycol for corrosion protection. If adding
antifreeze to the system, it is imperative that the entire system contain at
least 30% antifreeze concentration mixed with softened, reverse osmosis
or deionized water to prevent bacterial growth and minimize minerals
in the system. Bacterial growth is likely to occur with low antifreeze
concentrations and can cause corrosion in the furnace water jacket and/or
clogging of heat exchangers. To conrm the antifreeze solution is adequate
and to kill bacteria, immediately heat the system up to 185˚ F, allow the
pumps to circulate for at least 24 hours and then obtain a sample of the
system water. Using an antifreeze tester, the solution must be protected to
10˚F (-12˚C) or below.
NOTE: If using antifreeze, test the pH and Moly levels once each month. If the
bacterial issues occur, the pH will decrease.
NOTE: Be sure to adhere to all warnings and precautions on the antifreeze label.
NOTE: Do not use automotive or RV types of antifreeze.
NOTE: If using antifreeze, see Water Quality and Maintenance in your Owner’s Manual.
Initial Water Treatment, Fill and Testing
The Installation and Initial Water Treatment Guide provided with the furnace
provides step-by-step instructions for nalizing the installation which
includes important information about adding water treatment and lling
the outdoor furnace system for the rst time (or any time the system has
been completely drained and needs to be relled). Refer to Finalizing the
Installation. Use the following information for your outdoor furnace model:
MOLYARMOR 350 TREATMENT AMOUNTS
CleanFire 700 2 gallons
CleanFire 500 1 gallon
CleanFire 300 1 gallon

13
CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
NOTE: If the system has a larger than normal water capacity, more MolyArmor 350
should be added at a recommended rate of 6.5 oz. (190 ml) per 10 gallons (37.8
liters) of system water. One unit (1 gallon or 3.78 liters) of MolyArmor 350 will treat
200 gallons (757 liters) of system water.
Water Samples
Maintaining the corrosion inhibitor at a proper level is imperative to
preventing corrosion failures. To qualify for the 25 year warranty, you must
follow the instructions in the Owner's Manual and the Installation and Initial
Water Treatment Guide concerning initial water treatment and maintenance.
When the outdoor furnace is initially put into service, and once a year
after that, you are required to submit a water sample to conrm proper
maintenance and water treatment (see When to Submit Water Sample for
more information). No warranty claim can be approved unless the outdoor
furnace registration and the required water tests verications are on le at
WoodMaster.
NOTE: It is your responsibility as owner to ensure that your water sample information
is accurate and that you submit your samples on a timely basis as required by the
warranty for your stainless steel outdoor furnace. Failure to do so will result in a one
year warranty.
Water Sample Kit
Your owner's packet contains a Water Sample Kit for submitting an
initial water test. Additional Water Samples Kits are available from your
WoodMaster dealer.
When to Submit Water Sample
INITIAL WATER SAMPLE: You are required to submit an initial water sample
within 30 days of purchase of your outdoor furnace. EXCEPTION: if your
outdoor furnace is not being installed within 30 days of purchase, you
must email WoodMaster ([e-mail]) with an estimated
installation date, your name and your furnace serial number. When the
furnace installation is complete, send the water sample within 10 days of
the initial ll.
ANNUAL WATER SAMPLE: You are required to submit a water sample
yearly prior to the anniversary date of your initial installation. Record the
anniversary date below:
_________________________
DATE OF INSTALLATION
TO CHECK STATUS OF YOUR WATER SAMPLE: Check the status of your
water sample at:
WoodMaster.com/w25
You will need your serial number and postal code. Please allow 2-3 weeks
for results to be available.

14 CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
SYSTEM MAINTENANCE
An important part of outdoor furnace maintenance is controlling the quality
of the water in the outdoor furnace.
Water Test Kits and Test Results
DATE pH LEVEL MOLY LEVEL
Record the results of pH and Moly level tests in the table above.
If additional space is needed, record on a separate sheet of paper.
It is very important to keep record of water test results (including the date,
pH and Moly level).
The pH and Moly test strips and indicator have a shelf life of approximately
two years that can affect their accuracy. Test kits should be stored in a dry
area at room temperature to obtain maximum accuracy over a longer period
of time.
Biological contamination can occur if the furnace is not heated up to 185˚F
immediately after lling it with inhibitor and water as directed.
NOTE: ANY time water is added to the system, it is extremely important to bring the
water temperature up to operating temperature (185˚F) as soon as possible, even if
it is during the off-season. Failure to bring the water in the system up to operating
temperature immediately after lling the system can allow bacteria present in the
water to multiply and may increase the potential for corrosion in the sytem.
If the test indicates a signicantly lower-than-recommended pH level, add
MolyArmor to increase the pH level.

15
CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
If a test is conducted and veried that indicates a high pH (above 9.5), Use
the following steps to obtain the correct pH levels:
1. Drain the outdoor furnace until the water in the sight gauge
reaches the bottom of the sight gauge; then add fresh water until
it is 1 inch below the FULL mark on the sight gauge.
2. Circulate the water for 30 minutes. Test the water again and, if
needed, add MolyArmor 350 to achieve recommended Moly test
level.
3. Bring the water temperature up to operating temperature (185˚F),
circulate for 24 hours and test the system water again.
POST HEATING SEASON MAINTENANCE
The water should be left in the outdoor furnace if the outdoor furnace is not
being used for an extended period of time.
1. Refer to the Preventive Maintenance Schedule for a list of operations to
perform.
2. Shut off the power supply to the outdoor furnace.
3. Place a cover over the chimney to keep rain from entering the outdoor
furnace. Clean and oil the chimney ue to the rebox.
Flushing the System
If the system water is brown or orange, it is an indication that the corrosion
inhibitor level has not been maintained correctly and corrosion is present
in the water jacket. Sludge Conditioner (p/n 166 or 1660) can be used by
circulating the recommended amount through the furnace for one week
to help clean some of the corrosion from inside the water jacket before
ushing, draining and relling with water and the correct amount of
MolyArmor 350.
NOTE: Use one unit of Sludge Conditioner per 200 gallons of system water.
1. De-energize the pump(s) and close the supply and return valves on the
outdoor furnace. Remove the inspection panel and insulation covering
the drain to gain access to the drain valve. Remove the cap and
connect a hose to the drain.
2. Open the drain to drain the system; then ush the top of the rebox and
bottom of the water jacket beneath the rebox using a wand placed in
the vent.
CAUTION
Completely clean out the rebox before draining water from the outdoor furnace.

16 CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
NOTE: Pump configuration may vary from illustration.
Flush top of firebox and
bottom of water jacket
beneath firebox using
wand placed in vent.
Drain location
3. Close the drain valve securely and replace the cap on drain after
ushing the outdoor furnace.
4. Add recommended amount of MolyArmor 350.
5. Fill the outdoor furnace following the procedure in Finalizing the
Installation in the Installation Guide. Start the pump(s) and bring the
water temperature up to operating temperature (185˚F) for two hours
with the system circulating to thoroughly mix the MolyArmor 350.
NOTE: ANY time water is added to the system, it is extremely important to bring the
water temperature up to operating temperature (185˚F) as soon as possible, even if
it is during the off-season. Failure to bring the water in the system up to operating
temperature immediately after lling the system can allow bacteria present in the
water to multiply, which may increase the potential for corrosion in the system.
6. Insulate the area using a mat of berglass insulation.
7. Install the inspection panel and secure with self-tapping screws.
Draining Treated System Water
MolyArmor 350 is composed of
common materials. Molybdenum
compounds characterized as
nontoxic in US Public Health Bulletin
293, by the Federal Hazardous
Substances Labeling Act, and by
the Occupational Safety and Health
Act. However, in keeping with
good safety and environmental
practices, dispose furnace water in
accordance with federal, state and
local regulation. Unless regulation
prohibits, you may drain the outdoor
furnace to a home septic system.
If doing so, however, be careful not
to overow the septic system.
Do not drain the outdoor furnace in
such a manner that the drain water
could in any way contact surface
water, stream, river, estuary (where a
river meets a sea), lake, pond, ocean
or other types of waters.
Do not drain to any location within
50 feet (15 meters) of any water
well.