INSTALLATION INSTRUCTIONS
FOR OUTDOOR WOOD BOILER RETROFIT
PURESKY EMISSION CONTROL SYSTEM
OWB812
Read this manual carefully before installing the retrot emission control system.
Understand and observe all guidelines included in this manual for safe operation of
your outdoor wood boiler.
KEEP THIS MANUAL. IT CONTAINS IMPORTANT
HOMEOWNER INFORMATION ABOUT PURESKY
EMISSION SYSTEM.
IMPORTANT SAFETY PRECAUTIONS
The FMI PRODUCTS, LLC limited warranty will
be voided by, and FMI PRODUCTS, LLC will
disclaim any responsibility for the following:
1. Improper installation of your FMI PROD-
UCTS, LLC retrot emission control system
and FMI PRODUCTS, LLC component
parts. Consult your installation instructions.
2. Any alteration of FMI PRODUCTS, LLC
retrofit emission control system and/or
components.
The safety precautions and operating instruc-
tions in this installation instruction cannot
cover all possible situations that may arise
during use. Caution and care must always be
used when operating wood boiler.
Outdoor wood boiler should be installed, oper-
ated and maintained per the manufacturer's
instruction.
This product meets the EPA Hydronic Heater Program
Phase 2 emission level. NOTE: To ensure proper opera-
tion, the catalyst should be replaced at a minimum of 3
years and a maximum of 5 years.
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126253-01A2
INSTALLATION
Figure 1 - Attaching Intake Spacer
Bracket
4
FINAL ASSEMBLY OF PURESKY
EMISSION SYSTEM
1. Attach intake spacer bracket to air intake
pipe using provided self tapping screw
toward the bottom as shown in Figure 1.
Be careful not to press down self tapping
screws too hard and smash or crush
components.
2. Slide elbow over the top of the air intake
pipe and secure with 4 self tapping screws
provided as shown in Figure 2.
3. Slide the open end of the elbow over the
collar on the side of the emission system
unit. Secure with 1 provided self tapping
screw as shown in Figure 2.
4
Figure 2 - Attaching Elbow and Air Intake
Pipe
PureSky
Emission
System
Air Intake
Pipe
Elbow
Intake Spacer
Bracket
Intake Spacer
Bracket
Air Intake
Pipe
4. Secure air intake pipe to the emission
system unit using intake spacer bracket
with 2 self tapping screws as shown in
Figure 2.
INSTALLATION OF PURESKY
EMISSION SYSTEM
1. Place the entire PureSky emission system
over the ue on the outdoor wood boiler
and slide the ue up through the hole
on the bottom of the PureSky emission
system.
2. Secure the PureSky emission system to
the outdoor wood boiler. Each application
will vary.
INSTALLING ELECTRICAL OUTLET
BOX
1. The PureSky emission system comes
with an electrical outlet box separate from
the main unit. The box will need to be
mounted on the side of the outdoor wood
boiler in such a way that cords extending
from the electrical box can reach the
PureSky emission system and electrical
components of outdoor wood boiler.
2. Remove the 2 screws on the left and right
side of the outlet box on the PureSky
emission system. Inside this box remove
the nuts on the end of the heater rod using
pliers. The cord extending from the electri-
cal box that is shorter with a metal housing
on the end will have 2 wires coming out
the end with stainless steel connectors.
Slide the hole of the connector on the wire
over the each end of the heater rod and
replace the nut.
3. Place the metal housing over the box and
secure with the 2 previously removed
screws.
4. The cord extending from the electrical
box that is longer will have colored wires
coming out the end that will need to be
connected to the outdoor wood boiler.
Follow Wiring Diagram on page 6.
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126253-01A 3
Figure 3 - Lineal Gain
Hemmed
End
8"
Stainless
Inner Pipe
12
3
/
8
"
Galvanized
Outer Pipe
LINEAL GAIN
PART NO. DESCRIPTION GAIN
OWB812 Emission System
12-8DM Pipe Section 10
5
/
8
"
18-8DM Pipe Section 16
5
/
8
"
24-8DM Pipe Section 23
5
/
8
"
36-8DM Pipe Section 34
5
/
8
"
48-8DM Pipe Section 46
5
/
8
"
RT-8DM Round Termination
6
7
/
8
"*
* The lineal gain for the terminations is mea-
sured to the ue gas outlet height.
INSTALLATION
Continued
ASSEMBLY AND INSTALLATION OF
DOUBLE WALL CHIMNEY SYSTEM
The chimney system approved for this product
consists of 12", 18", 24", 36" and 48" snap-
lock, double-wall pipe segments, planned
for maximum adaptability to individual site
requirements. Actual lengths gained after t-
ting overlaps must be taken into consideration
(lineal gain) and are given in the lineal gain
chart (see Figure 3). Lineal Gain is the actual
measurable length of a part after two or more
parts are connected.
Each double wall chimney section consists of
a galvanized outer pipe, a stainless steel inner
ue pipe and a wire spacer. Pipe sections must
be assembled independently as chimney is
installed. When connecting chimney directly
to the PureSky emission control system, in-
ner ue pipe section must be installed rst
with lanced side up. Outer pipe section can
then be installed over ue pipe section with
hemmed end up. Press down on each pipe
section until lances securely engage hem on
top of emission system outdoor wood boiler.
Wire will assure proper spacing between inner
and outer pipe sections.
70.25” min.
PureSky
Emission
System
Outdoor
Wood
Boiler
Figure 4 - Height of Venting System
WARNING: The opening in the
collar around the chimney at the top
of the PureSky emission system
must not be obstructed.
Continue to assemble chimney sections as
outlined below, making sure that both inner
and outer pipe sections are locked together.
When installing double wall snap-lock chimney
together, it is important to assure joint between
chimney sections is locked. Check by pulling
chimney upward after locking. Chimney will not
come apart if properly locked. It is not neces-
sary to add screws to keep chimney together.
Terminations must extend a minimum of
70.25" in height above the PureSky emission
system (see Figure 4).
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126253-01A4
INSTALLATION
Continued
OUTDOOR WOOD FURNACE BEST
BURN PRACTICE
• If outdoor wood boiler is located within
300 feet to any residence not served by
the furnace, it is recommended that the
chimney be at least 2 feet higher than
the peak of the residence served.
• If outdoor wood boiler is located within
100 feet to any residence not served by
the furnace, the chimney must be 2 feet
higher than the peak of the residence
served or not served, whichever is
higher.
TERMINATIONS/SPARK ARRESTOR
The emission system must be terminated
with listed round top termination. In any case,
refer to installation instructions supplied with
termination. Terminations approved for this
emission system is RT-8DM.
RT-8DM
Level of
Flue Gas
Outlet
Attach
Bracket Tabs
to Outer Pipe
(3 Places)
Secure with
Screws
Figure 18 - Termination
CHIMNEY REINFORCEMENT
Refer to the manufacturer of your outdoor
wood boiler for their chimney reinforcement
recommendations.
It is FMI PRODUCTS, LLC recommendation
that if exposed portion of chimney is greater
than ve feet above rooine, support wires are
recommended to keep chimney secured. (see
Accessories on page 7). Support wires must
be attached to chimney support brackets.
Chimney support brackets must be attached
to outer pipe of chimney with self-drilling
screws provided in kit (screws must not pen-
etrate inner ue pipe). The angle of support
wires should not be more than 45° from hori-
zontal when fastened to roof. Place chimney
support brackets approximately 18" below
termination and space brackets approximately
120° apart. Follow instructions included in kit.
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126253-01A 5
PURESKY EMISSION CONTROL SYSTEM
This PureSky Emission Control System re-
duces particulates emissions in an outdoor
wood boiler to meet the EPA Hydronic Heater
Program Phase 2 emission level.
The proper use of your outdoor wood boiler
equipped with the PureSky emission system
will signicantly reduce the emissions that it
produces. Simple fuel considerations with
regard to moisture content, size, and quality
of fuel will help control the production of wood
smoke and improve the performance of the
catalyst. With proper care, the catalyst will
provide years of fuel savings and lowered
emissions. By following some simple guide-
lines, you will ensure maximum performance
and longevity.
The smoke that is usually seen coming out
of a chimney is essentially a combination of
unburned fuel (carbon and hydrogen) and
moisture in the form of water vapor. The cata-
lyst is a technology that provides secondary
combustion for the wood burning process.
FUELING GUIDELINES
Burn only natural wood or the manufacturer's
listed fuels may be burned in the outdoor wood
boiler equipped with the PureSky emission
control system. Burning of any and all material
is prohibited. Avoid the use of coated, painted
or pressure treated wood, ocean driftwood,
plywood, particle board, or wood with glue on
it. Never burn garbage, cardboard, plastics,
foam, colored newspapers or magazines.
Do not use articial logs, or petroleum based
re starters. Avoid wood with high salt content.
All of these materials may contain compounds
which can shorten the life of the catalyst. Wet
or unseasoned wood may lower catalytic tem-
peratures and result in inefcient operation.
The catalyst is designed to function at op-
timum efciency when the wood boiler is
burning clean, dry, cord wood as wood boiler
fuel. A simple visual inspection of the chimney
during the wood burning process will deter-
mine catalyst performance.
CLEANING AND MAINTENANCE
The PureSky Emission Control System is a
maintenance free technology. Do not attempt
to remove or clean the combustor. The direct
ame from the re will clean the combustor.
Only a certied technician should remove the
unit. To ensure proper operation, the PureSky
catalyst should be replaced every 3 to 5 years
(see Parts on page 22).
NOTE: Chimney smoke may be visible during
the rst 8 to 10 minutes of operation when the
re is rst getting started and the nal 8 to 10
minutes of operation while the re is dissipat-
ing. Under normal operating conditions, you
should see little or no smoke coming out of
the chimney. If continuous smoke is visible,
make sure only dry seasoned wood is be-
ing burned. If visible smoke continues, the
combustor has ceased to function or there
is thermal crumbling. Call FMI PRODUCTS,
LLC for replacement parts.
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126253-01A6
WIRING DIAGRAM
PARTS
Green
To Power
Ground
Black
To Te mp
Controller Out
Red
To Draft
Door Solenoid
Yellow
BlackTo Power
HOT
White
High Temp
Braided White
To Power
Neutral
High Temp
Braided White
To Heater
Rod
To Heater
Rod
PART NO. DESCRIPTION QTY.
126149-01 Air Intake Pipe 1
126168-01 Elbow 1
126157-01 Intake Spacer Bracket 1
126162-01 Heater Rod 1
126163-01 Ceramic Catalyst 1
126210-01 Timer 1
126211-01 Relay 1
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126253-01A 7
ACCESSORIES
DOUBLE WALL PIPE -
24-8DM, 48-8DM
CHIMNEY SUPPORT BRACKET KIT -
CSK-8DM
ROUND TOP TERMINATION - RT-8DM
TECHNICAL SERVICE
You may have further questions about
installation, operation, or troubleshooting.
If so, contact FMI PRODUCTS, LLC at
1-866-328-4537.
You can also visit FMI PRODUCTS, LLC's
web site at www.fmiproducts.com.
REPLACEMENT PARTS
If this product is missing a part or has a
broken component, please do not return it
to the store. Call FMI PRODUCTS, LLC at
1-866-328-4537 to answer questions and
replace parts under warranty.
Note: Use only original replacement parts.
This will protect your warranty coverage for
parts replaced under warranty.
When calling or writing, please have your
model and serial numbers of your emission
control system ready.
126253-01
Rev. A
06/12
WARRANTY
KEEP THIS WARRANTY
FMI PRODUCTS, LLC LIMITED WARRANTIES
New Products
Standard Warranty: FMI PRODUCTS, LLC warrants this new product and any parts thereof to be free from defects
in material and workmanship for a period of two (2) years from the date of rst purchase from an authorized dealer
provided the product has been installed, maintained and operated in accordance with FMI PRODUCTS, LLC’s
warnings and instructions.
For products purchased for commercial, industrial or rental usage, this warranty is limited to 90 days from the date
of rst purchase.
Factory Reconditioned Products
Limited Warranty: FMI PRODUCTS, LLC warrants factory reconditioned products and any parts thereof to be
free from defects in material and workmanship for 30 days from the date of rst purchase from an authorized dealer
provided the product has been installed, maintained and operated in accordance with FMI PRODUCTS, LLC’s
warnings and instructions.
Terms Common to All Warranties
The following terms apply to all of the above warranties:
Always specify model number and serial number when contacting the manufacturer. To make a claim under this
warranty the bill of sale or other proof of purchase must be presented.
This warranty is extended only to the original retail purchaser when purchased from an authorized dealer, and only
when installed by a qualied installer in accordance with all local codes and instructions furnished with this product.
This warranty covers the cost of part(s) required to restore this product to proper operating condition and an allowance
for labor when provided by a FMI PRODUCTS, LLC Authorized Service Center or a provider approved by FMI PROD-
UCTS, LLC. Warranty parts must be obtained through authorized dealers of this product and/or FMI PRODUCTS, LLC
who will provide original factory replacement parts. Failure to use original factory replacement parts voids this warranty.
Travel, handling, transportation, diagnostic, material, labor and incidental costs associated with warranty repairs, unless
expressly covered by this warranty, are not reimbursable under this warranty and are the responsibility of the owner.
Excluded from this warranty are products or parts that fail or become damaged due to misuse, accidents, improper
installation, lack of proper maintenance, tampering, or alteration(s).
This is FMI PRODUCTS, LLC’s exclusive warranty, and to the full extent allowed by law; this express warranty
excludes any and all other warranties, express or implied, written or verbal and limits the duration of any and all
implied warranties, including warranties of merchantability and tness for a particular purpose to two (2) years on
new products and 30 days on factory reconditioned products from the date of rst purchase. FMI PRODUCTS, LLC
makes no other warranties regarding this product.
FMI PRODUCTS, LLC’s liability is limited to the purchase price of the product, and FMI PRODUCTS, LLC shall not
be liable for any other damages whatsoever under any circumstances including indirect, incidental, or consequential
damages.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental
or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specic legal rights, and you may also have other rights which vary from state to state.
For information about this warranty contact:
Model (
located on product or identication tag
) _____________________________
Serial No. (
located on product or identication tag
) __________________________
Date Purchased __________________________
Keep receipt for warranty verication.
2701 S. Harbor Blvd.
Santa Ana, CA 92704
1-866-328-4537
www.fmiproducts.com
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