Regency MANSFIELD L850B ST Quick start guide

Model: MANSFIELD L850B ST
Owners &
Installation
PLEASE KEEP THESE INSTRUCTIONS FOR
FUTURE REFERENCE
Manual
March-08-2017
919-638e
WARNING:
Improper installation, adjustment, alteration, service or maintenance can
cause injury or property damage. Refer to this manual. For assistance or
additional information consult an authorised installer, service agency or
the distributor.
It is highly recommended for protection of infants and infirm to place a
secure safety guard in front of this appliance when in operation.
SEE-THRU WOOD FIREPLACE
FPI - FIREPLACE PRODUCTS AUSTRALIA PTY LTD.
1 - 3 CONQUEST WAY HALLAM VICTORIA 3803

2Mansfield L850B ST Woodfire
Thank-you for purchasing a
REGENCY FIREPLACE PRODUCT
The pride of workmanship that goes into each of our products will give you years of trouble-free
enjoyment. Should you have any questions about your product that are not covered in this manual,
please contact the REGENCY DEALER in your area.
Keep those REGENCY FIRES burning.
SAFETY NOTE: If this wood fire is not properly installed, a house fire may result. For your safety,
follow the installation instructions, contact local building, fire officials, or authority having jurisdiction
about restrictions and installation inspection requirements in your area.
The authority having jurisdiction should be consulted before installation to determine the need to
obtain a permit.
CAUTION: BURN UNTREATED WOOD ONLY. OTHER MATERIALS SUCH AS WOOD PRESER-
VATIVES, METAL FOILS, COAL, PLASTIC, GARBAGE, SULPHUR OR OIL WILL DAMAGE THE
FIRE AND ATMOSPHERE.
"This wood heater is designed to burn natural wood only. Higher efficiencies and lower emissions
generally result when burning air dried seasoned hardwoods, as compared to green or freshly
cut hardwoods."
ONLY CLEAN APPLIANCE WITH A DAMP CLOTH
(NEVER WHEN UNIT IS HOT)
DO NOT USE ANY ABRASIVE CLEANERS
DO NOT BURN (WILL VOID WARRANTY):
• Treated wood • Tea Tree • Oil Based woods • Coal • Garbage
• Cardboard • Solvents • Colored Paper • Trash

Mansfield L850B ST Woodfire 3
table of
contents
Copy of data badge .......................................................4
Unit dimensions.............................................................5
Before Installing Your replace......................................6
Safety Guidelines and Warnings/Cautions ....................7
Unit dimensions.............................................................8
Zero clearance box dimensions.....................................8
Wood replace specics and Minimum clearances.......9
Combustibles...............................................................10
Optional Base Frame .................................................. 11
Flue and chimney Requirements.................................14
Flue Requirements ......................................................15
Installation Instructions................................................16
Unit Preparation/Framing/Clean Edge.........................16
Installation Instructions................................................17
Unit Preparation/Framing/Clean Edge.........................18
Installation Instructions................................................19
Unit Preparation/Framing/Clean Edge Wall Finishing .19
Optional fan kit installation...........................................20
Fan Duct extension kit.................................................22
Optional outside air kit installation ..............................23
Brick installation ..........................................................24
Appliance maintenance ...............................................25
Creosote......................................................................25
Ash removal.................................................................25
Glass Installation .........................................................25
Maintenance................................................................25
Glass Maintenance......................................................25
Door Latch Adjustment ................................................25
Operating Instructions .................................................26
Air slide Control ...........................................................26
Wood storage ..............................................................26
Lighting the appliance and the rst few res ...............27
Trouble shooting..........................................................28
Main Assembly ............................................................29
Warranty ......................................................................32

4Mansfield L850B ST Woodfire
data badge
This is a copy of the data badge that accompanies
each L850B ST Fireplace. We have included a copy
of the contents here for your review.
NOTE: Regency units are constantly being
improved. Check the data badge on the unit
and if there is a difference, the data badge on
the unit is the correct one.
COPY OF DATA BADGE
Part #: 919-639
Colour: Black on Grey
Size: 100% 7.97”w x 3.7”h
Feb. 25/16: Created Draft
July 6/16: Updated data
Model: MANSFIELD L850B ST
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2017 2018 2019 2020 2021
TESTED BY: AUSTRALIA SOLID FUEL
TESTING PTY LTD.
3 GARDEN STREET, MORWELL VIC 3870
MAXIMUM AVERAGE HEAT OUTPUT BURNING HARDWOOD: 13 kW
OVERALL AVERAGE EFFICIENCY BURNING HARDWOOD: 63%
Date of Manufacture:
Serial
Number
919-639
444
WHEN TESTED IN ACCORDANCE WITH AS/NZS 4012:2014 & AS/NZS 4013:2014
PARTICULATE EMISSION FACTOR: 1.3 g/kg
CATALYTIC COMBUSTOR: NO
TEST REPORT NUMBER: ASFT16102 -1
MAKE: REGENCY
TYPE: FIREPLACE INBUILT
MANUFACTURER/DISTRIBUTOR: FIREPLACE PRODUCTS AUSTRALIA PTY. LTD.
1 - 3 CONQUEST WAY, HALLAM VIC 3803

Mansfield L850B ST Woodfire 5
dimensions
UNIT DIMENSIONS
645
499
569
1098
927
493
499
1193
790
310
300 927
1227
1287
1073
1098
Note: All dimensions in millimetres.

6Mansfield L850B ST Woodfire
installation
BEFORE INSTALLING YOUR FIREPLACE
1) Please read this entire manual before you install and use your new wood fireplace. Failure to follow instructions may result in property damage, bodily
injury or even death. Install and use only in accordance with manufacturer’s installation and operating instructions.
2) Check your local building codes - Building Inspection Department. You may require a permit before installing your fireplace. Be aware that local codes
and regulations may override some items in the manual.
3) Notify your home insurance company that you plan to install a fireplace insert or freestanding heater.
4) THE FIREPLACE CAN GET VERY HOT. DO NOT INSTALL, PLACE OR POSITION TV’S, PAINTINGS, PICTURES, CANDLES, FURNITURE, DRAPES
OR ANY OTHER COMBUSTIBLE ITEMS ON THE WALL OR NEAR THE FIREPLACE.
5) ENSURE THERE ARE NO EXHAUST FANS WITHIN THE VICINITY OF THE FIREPLACE AS THIS CAN CAUSE THE FIREPLACE TO EMIT FUMES
BACK INTO THE ROOM.
6) ENSURE THERE IS ADEQUATE AIR SUPPLY WITHIN THE ROOM/AREA THE FIREPLACE IS BEING INSTALLED IN TO ENSURE PROPER
OPERATION OF THE FIREPLACE. INSTALL OPTIONAL OUTSIDE AIR KIT IF IN DOUBT.
7) EVALUATE THE LOCATION OF YOUR FIREPLACE AND OPTIONAL COMPONENTS. IT IS VERY IMPORTANT TO DETERMINE HOW THE FIREPLACE
IS GOING TO BE FINISHED. THE FEATURES YOU WOULD LIKE TO INCORPORATE SUCH AS FINISH TRIM, OUTSIDE AIR AND FAN KIT NEED TO
BE EVALUATED.
8) DETERMINE WHAT THE THICKNESS OF YOUR DESIRED NON-COMBUSTIBLE FINISHING MATERIALS WILL BE INCLUDING THE
NON-COMBUSTIBLE BOARD. THIS PREDETERMINED THICKNESS WILL DICTATE THE POSITION OF THE NAILING FLANGES, FRAMING AND
OVERALL FINAL LOOK OF YOUR FIREPLACE.
9) Your fireplace is heavy and requires two or more people to move it safely. The fireplace can be badly damaged by mishandling and or injury can occur.
10) Do not connect the fireplace to a flue system servicing another appliance or an air distribution duct.
WARNING: CARELESS INSTALLATION IS THE MAJOR CAUSE OF SAFETY HAZARD. CHECK ALL LOCAL BUILDING AND SAFETY CODES BEFORE
INSTALLATION OF UNIT.
THE APPLIANCE, WHEN INSTALLED, MUST BE ELECTRICALLY GROUNDED IN ACCORDANCE WITH LOCAL CODES.
Regency Fireplaces are constructed with the highest quality materials and assembled under strict quality control procedures that ensure years of trouble free
and reliable performance.
It is important that you read this manual thoroughly and fully understand the safe installation and operating procedures. The more you understand the way
your Regency Fireplace operates, the more enjoyment you will experience from knowing that your unit is operating at peak performance.

Mansfield L850B ST Woodfire 7
installation
1) Never use petrol, petrol type lantern fuels, kerosene, charcoal lighter
fuel, or similar liquids to start or ‘freshen up’ a fire in your heater.
Keep all such liquids well away from the heater while it is in use.
2) Keep the door closed during operation and maintain all seals in
good condition.
3) Do not burn any quantities of paper, garbage, and never burn flam-
mable fluids such as petrol, naptha or engine oil in your heater.
4) If you have smoke detectors, prevent smoke spillage as this may
set off a false alarm.
5) Do not overfire heater. If the flue connector, flue baffle or the heater
top begin to glow, you are overfiring. Stop adding fuel and close
the draft control. Overfiring can cause extensive damage to your
heater including warpage and premature steel corrosion. Overfiring
will void your warranty.
6) Do not permit creosote or soot build-up in the flue system. Check
and clean flue at regular intervals. Failure to do so can result in a
serious flue fire.
7) Your Regency heater can be very hot. You may be seriously burned
if you touch the heater while it is operating, keep children, clothing
and furniture away. Warn children of the burn hazard. For safety
reasons a guard around the fire is recommended.
8) The heater consumes air while operating, provide adequate ventila-
tion with an air duct or open a window while the heater is in use or
use optional outside air kit.
9) Do not use grates or andirons or other methods for supporting fuel.
Burn directly on the base or bricks where supplied.
10) Open the draft control fully for 10 to 15 seconds prior to slowly
opening the door when refuelling the fire.
11) Your wood fire should burn dry, standard firewood only. The use of
cut timber, plywood, “mill ends”, etc. is not allowed as this fuel can
easily overheat your wood fire. Evidence of excessive overheating
will void your warranty. As well, a large portion of sawmill waste is
chemically treated timber, which is illegal to burn in many areas.
Salt drift wood and chemically treated fire logs also must not be
burned in your wood fire.
WARNING: THE APPLIANCE AND FLUE-SYSTEM SHALL BE
INSTALLED IN ACCORDANCE WITH AS/NZS 2918 AND THE
APPROPRIATE REQUIREMENTS OF THE RELEVANT BUILD-
ING CODE OR CODES. UNIT FLUEING REQUIRES A MINIMUM
OF 50 MM CLEARANCE TO COMBUSTIBLES.
WARNING: APPLIANCES INSTALLED IN ACCORDANCE WITH
THIS STANDARD SHALL COMPLY WITH THE REQUIREMENTS
OF AS/NZS 4013 WHERE REQUIRED BY THE REGULATORY
AUTHORITY. I.E. THE APPLIANCE SHALL BE IDENTIFIABLE
BY A COMPLIANCE PLATE WITH THE MARKING 'TESTED
TO AS/NZS 4013'.
ANY MODIFICATION OF THE APPLIANCE THAT HAS NOT BEEN
APPROVED IN WRITING BY THE TESTING AUTHORITY
IS CONSIDERED TO BE IN BREACH OF THE APPROVAL
GRANTED FOR COMPLIANCE WITH AS/NZS 4013.
CAUTION: MIXING OF APPLIANCE OR FLUE-SYSTEM COMPO-
NENTS FROM DIFFERENT SOURCES OR MODIFYING THE
DIMENSIONAL SPECIFICATION OF COMPONENTS MAY
RESULT IN HAZARDOUS CONDITIONS. WHERE SUCH AC-
TION IS CONSIDERED, THE MANUFACTURER SHOULD BE
CONSULTED IN THE FIRST INSTANCE.
CAUTION: CRACKED AND BROKEN COMPONENTS, e.g. GLASS
PANELS OR CERAMIC TILES MAY RENDER THE INSTALLA-
TION UNSAFE.
WARNING: ANY MODIFICATION OF THE APPLIANCE THAT HAS
NOT BEEN APPROVED IN WRITING BY THE TESTING AU-
THORITY IS CONSIDERED AS BREACHING AS/NZS 4013.
WARNING: DO NOT USE FLAMMABLE LIQUIDS OR AEROSOLS
TO START OR REKINDLE THE FIRE.
WARNING DO NOT USE FLAMMABLE LIQUIDS OR AEROSOLS IN
THE VICINITY OF THIS APPLIANCE WHEN IT IS OPERATING.
WARNING: DO NOT STORE FUEL WITHIN HEATER INSTALLA-
TION CLEARANCES.
WARNING: DO NOT USE AS AN OPEN FIRE OR OPERATE WITH
THE DOOR OPEN.
WARNING: OPEN AIR CONTROL (AND DAMPER WHEN FITTED)
BEFORE OPENING FIRE DOOR.
CAUTION: THIS APPLIANCE SHOULD BE MAINTAINED AND
OPERATED AT ALL TIMES IN ACCORDANCE WITH THESE
INSTRUCTIONS
CAUTION: THE USE OF SOME TYPES PRESERVATIVE-TREATED
WOOD AS A FUEL CAN BE HAZARDOUS
CAUTION: THIS APPLIANCE SHOULD NOT BE OPERATED WITH
CRACKED GLASS
SAFETY GUIDELINES AND WARNINGS/CAUTIONS

8Mansfield L850B ST Woodfire
installation
UNIT DIMENSIONS
ZERO CLEARANCE BOX DIMENSIONS
Dimensions
The outside dimensions of the Mansfield L850B ST including the Zero
Clearance Box is as follows:
● Width = 1073mm
● Depth = 499mm
● Height = 927mm
Height of optional Base Framing Kit = 300mm
Note: Base is non-combustible and needs assembly
Height of zero clearance box off the ground should be a minimum of
300mm and supported by a non-combustible stand able to support 332kg.
Note: Depth is determined by the position of the nailing strips and thick-
ness of non-combustible wall finish.
Flue
The flue must be of the triple skin type
with an approved cowl and must extend
a minimum of 4.6 metres above the top
of the floor protector.
Optional Ducting
2 x Optional fan forced ducting vents
are available, using 150mm ducting to
a max run of 9 Meters.
645
572 499
1098
927
499
1073

Mansfield L850B ST Woodfire 9
installation
WOOD FIREPLACE SPECIFICS AND MINIMUM CLEARANCES
Framing and Wall Cladding Guide
Finishing material must be flush with the outer edge of Clean Edge Finish –
see page 19.
Finishing material must not protrude past the outer edge of Clean Edge Fin-
ish – see page 19.
All walls of the enclosure must be a minimum of 9 mm non-combustible
board compliant with AS1530-1 and AS1530-3.
*Cavity Depth = 570 mm – total thickness of finish material on each side of
the heater.
*Maximum finishing material thickness is 15 mm on the front face of the
enclosure to ensure a minimum air gap of 20 mm between the face of the
zero clearance box and the back face of the finishing material on each side
of the heater.
Cavity depth is noted with nailing strips (top & sides) set for the correct thick-
nesses of non-combustible material and wall finishes.
Ceiling inside of the cavity is to be 2.4 metres minimum.
Ceiling in the room is to be 2.4 metres minimum.
Ceiling can be of combustible materials.
Hearth Requirements
Hearth needs to be 9mm thick non-combustible material, 1220mm wide and
300mm deep extending out from door on both sides. We do recommend that
your non-combustible hearth extends 900mm in front of the unit. This allows
the floor to be protected when the door is fully open in case of ember drop.
The appliance must be installed on a non-combustible stand 300mm above
the hearth.
NEW OR EXISTING
CEILING
50mm
CLEARANCE IS
REQUIRED
TO FLUEING
WHEN PASSING
THRU
COMBUSTIBLE
CEILING.
1080mm min.
VENTILATION
GRILL
REQUIRED
MINIMUM
OPEN AREA
OF 8000mm2
MINIMUM OF
1080mm
ABOVE FUEL
LOADING
DOOR
VENTILATION
GRILL REQUIRED
MINIMUM OPEN
AREA OF 8000mm2
700mm
700mm
9mm HEARTH THICKNESS
LOWER
UPPER
ON ONE SIDEO
ONLY
ON ONE SIDEO
ONLY
TO THE FINISHED FLOOR
EXTENDING 300MM
Appliance Enclosure
(see above)
1150mm
1580mm
1220mm
300mm
300mm
Combustible Wall
250mm from side of appliance to combustible wall
Cavity Depth
Cavity Width = 1580 mm minimum
Cavity volume is critical and must not be reduced.
The enclosure must be fitted with an air ventilation grill centrally located below
one of the door openings and centrally located above one of the door open-
ings, as high as possible. Minimum 1080mm above top of fuel loading door.
Both grills must be installed as per diagram below.
Framing
When constructing the framework for the enclosure :
• All framing must be non-combustible material
• There must be a 25 mm clearance between any vertical or horizontal stud
and the body of the zero clearance box, to the sides and above the zero
clearance box

10 Mansfield L850B ST Woodfire
installation
COMBUSTIBLES
Combustible Enclosure of
Chimney when passing
through 2nd Floor
Combustible Ceiling
2nd Floor
Combustible Ceiling
Minimum
50mm
clearance to
combustibles
as it passes
through floors,
living space
and ceilings.
Minimum
50mm
clearance to
combustibles
as it passes
through floors,
living space
and ceilings.
1. Ventilation grills = 2 grills, 1 below & 1 above fuel loading doors. One grill each side or opposite sides. Only two grills required.
Require minimum 8000mm2 of open area for each grill.
2. Require unit to be raised minimum of 300mm from finished floor.
3. Non-combustible board and steel framing is required for the entire enclosure however the ceiling may be of combustible material -
see page 9 for minimum ceiling height.
4. Clearances to combustibles for triple skin flue as it passes through ceiling, living spaces = 50mm.
5. Non-combustible with walls of enclosure to be 9mm thick minimum.

Mansfield L850B ST Woodfire 11
installation
OPTIONAL BASE FRAME
CONSTRUCTING YOUR OWN BASE FRAME
WHEN BUILDING YOUR OWN BASE FRAME OR PEDESTAL BASE PLEASE
ENSURE THE FOLLOWING CONDITIONS ARE MET:
1. MINIMUM HEIGHT OF THE BASE FRAME IS 300MM FROM THE FINISHED FLOOR TO THE UNDERSIDE OF THE ZERO SHELL. IF BASE FRAME
DOES NOT SIT ON THE SAME LEVEL OF THE FINISHED FLOOR, THEN THE FRAME NEEDS TO BE MADE TALLER TO ENSURE THE 300MM
CLEARANCE IS MET. (SEE PAGE 9).
2. ENSURE THE CENTRE OF THE BASE IS HOLLOW TO ALLOW THE HOOK-UP OF THE OPTIONAL OUTSIDE AIR KIT.
3. ENSURE THE BASE IS CONSTRUCTED OF NON-COMBUSTIBLE MATERIALS
4. ENSURE THE BASE CAN WITHSTAND THE WEIGHT OF AT LEAST 332KG PLUS.
5. ENSURE THE FLOOR BENEATH THE BASE CAN WITHSTAND AT LEAST 332KG PLUS.

12 Mansfield L850B ST Woodfire
installation
FLUE AND CHIMNEY REQUIREMENTS
PLEASE READ AND REFER TO INSTALLATION INSTRUCTIONS UNIT PREPARATION ON PAGE 16
3. 9” and 11” galvanised skin fitted Air cooled bracket positions 9” inside shell
and 11” outside shell – Note: crimped end of outer flue faces upwards.
Top of Unit prior to installation of the flue. The packaging material has been
removed
1. 7" starter flue fitted. Note the crimped end is down (into unit)
2. 7" Flue fitted. Note: crimped end is down. Must connect active pipe using
stainless steel rivets or self drilling screws. 2 for each join.
4. 9” & 11” galvanized flue skin fitted with aircooling bracket
5. Air cooled bracket and pipe fitted to unit
NOTE: INSTALL REGENCY APPROVED FLUE KIT ONLY

Mansfield L850B ST Woodfire 13
installation
6. Top of 9” and 11” galvanized flue skins.
Note: Ventilation at top of outer flue where it meets cowl – must be vented
to allow heat escape.
Note: 9” skin will be shorter than 11” at top – this is fine as allows 9” to vent
into outer and cowl.
At this stage of the installation the unit is installed with the flue system and
any optional kits. The next step is to install and set the nailing flanges in the
correct position to accommodate the front wall framing and finishing.

14 Mansfield L850B ST Woodfire
installation
FLUE REQUIREMENTS
THE FLUE PIPE SHALL EXTEND NOT LESS THAN 4.6 M ABOVE THE TOP OF THE FLOOR PROTECTOR.
NOTE: INSTALLATION MUST BE CARRIED OUT BY A LICENSED INSTALLER IN ACCORDANCE WITH AS/NZS 2918:2001

Mansfield L850B ST Woodfire 15
installation
FLUE REQUIREMENTS
Typical Example of a Sloped Ceiling Penetration
Example of Roof Penetration
Gap 50
Gap 50
50
roof

16 Mansfield L850B ST Woodfire
installation
INSTALLATION INSTRUCTIONS
UNIT PREPARATION/FRAMING/CLEAN EDGE
BEFORE INSTALLING ENSURE THE FOLLOWING:
READ THE ENTIRE MANUAL
EVALUATE THE LOCATION OF YOUR FIREPLACE AND LOCA-
TION OF OPTIONAL COMPONENTS SUCH AS FAN, OUTSIDE
AIR AND FINISH TRIMS.
DETERMINE THE THICKNESS OF YOUR DESIRED NON-COM-
BUSTIBLE FINISHING MATERIALS INCLUDING THE REQUIRED
NON-COMBUSTIBLE BOARD. THIS PREDETERMINED THICK-
NESS WILL DICTATE THE CAVITY DEPTH, POSITION OF THE
NAILING FLANGES, FRAMING AND OVERALL FINAL LOOK OF
YOUR FIREPLACE.
The unit comes standard with nailing flanges and clean edge frame installed
on both sides.
Clean edge frame: MAXIMUMTHICKNESS OF FINISHING MATERIAL: 15MM
1. Determine the location of the fireplace, flueing location and locations of the
options such as the Fan Kit and outside air.
2. Construct your base frame. Please see BASE FRAME instructions on page
11. The base frame is required TO RAISE THE UNIT in order to meet the
300mm clearance to the finished floor.
3. Position your base frame in the predetermined location of fireplace. Level
then mark the position of the base frame. Remove the frame and set aside.
4. Frame out back wall if required and side walls only of the fireplace cavity.
DO NOT FRAME FRONT WALL. The back and side walls of the cavity
need to be constructed using steel studs. Please refer to page 9 and 10 for
clearances and cavity depth.
5. Reinstall the base frame and secure to the floor ensuring the frame is level.
6. If using optional outside air kit please refer to the outside air kit in this
manual. The optional air kit adapter must be installed prior to the unit being
positioned on to the base frame
7. Install the fireplace on the base frame. Secure unit to the base frame
Base Frame

Mansfield L850B ST Woodfire 17
installation
8. DETERMINE THE THICKNESS OF THE FINISHING MATERIAL.
INSTALLATION INSTRUCTIONS
UNIT PREPARATION/FRAMING/CLEAN EDGE
9. You are now ready to install the flueing.
Please refer to Flue requirements in this manual then install your flue system.
10. After the flue has been installed, complete the install of your optional kits
such as fan and/or outside air kit
When cutting a rectangular opening in the finishing
material to fit around the clean edge :-
Width
The width of the opening must include the actual width of the clean edge
finish (outside edge to outside edge) plus allow for the 20 mm stand-offs on
the left & right sides
Height
The height of the opening must include the actual height of the clean edge
finish (outside edge to outside edge) plus allow for the 20 mm stand-offs on
the top edge plus a 5 mm air gap along the bottom edge
The actual position of the opening in the facing material will depend on site
conditions, finished floor level, the height of the zero clearance box off finished
floor level, etc. We suggest, to avoid errors, that these measurements be taken
when the heater is actually installed in its final location.

18 Mansfield L850B ST Woodfire
installation
INSTALLATION INSTRUCTIONS
UNIT PREPARATION/FRAMING/CLEAN EDGE
15. Install the nailing strips. The unit comes with eight nailing strips. The top,
left and right side are all the same and the bottom one is the smaller piece.
Install the top and side nailing strips with the slotted side on the unit. The left
and right should NOT be touching the floor. Secure with the screws provided.
Install the bottom small nailing flange and secure to the left and right vertical
ones. DO NOTTIGHTEN SCREWS on the top, left and right nailing flanges.
Nailing strip installed with slotted side on unit. The slot allows the movement
of the nailing strip to be adjusted depending upon thickness of finish material.
Smaller Bottom Nailing
Flange
Top nailing flange-secure
to steel framing
Nailing flange-
secure to steel
framing
Nailing flange-
secure to steel
framing
Bottom nailing flange-
secure to left and right
vertical nailing flanges Note: Keep left and right nailing
flanges off the floor to allow for
adjust ability

Mansfield L850B ST Woodfire 19
installation
1. When using the Clean Edge Frame, position the nailing flanges to the
pre-determined thickness of the finish material. The finish materials and
non- combustible board are to sit flush with the edge of the Clean Edge
Frame. Using the scrap pieces as a gauge position them so they are flush
with the front edge of the clean edge frame. Then slide the top nailing flange
so it is tight against the back of the non-combustible board/finish material
and tighten the screws. Do the same to the left and right sides.
THE NAILING FLANGES ARE NOW SET TO THE THICKNESS OF THE
FINISH MATERIAL
INSTALLATION INSTRUCTIONS
UNIT PREPARATION / FRAMING / CLEAN EDGE WALL FINISHING
Finish Material
Finish material to this
edge
Nailing flanges
pulled forward to
butt up against
backside of finish
material
Nailing flanges pulled forward
against the backside of finish
material to provide backing
and support
2. Install the steel framing: Both walls require construction of non-combustible
materials including the framing. Steel stud framing must be used. Install the
left and right vertical steel frame and secure to the nailing flanges. Position
the steel frame behind the nailing flange. Install the top horizontal steel frame
and secure to the top nailing flange.
Secure nailing flanges to steel framing
Steel framing installed
3. Finish constructing the remainder of the front wall using steel framing. Ensure
the framing is level and plumb and there is enough framing to secure the
required non-combustible board.
4. Install the non-combustible board. Ensure there are no seams on the top
and sides as these areas get extremely hot. Having no seams on the top
and side will prevent cracking. Use only high heat non-combustible board.
5. Install the final layer of finishing material such as tile, slate. Etc. ENSURE
ALL ADHESIVES/ GLUES/ ETC ARE HIGH HEAT RESISTANT. ALLOW
BONDING AGENTS TO CURE PROPERLY BEFORE FIRING UNIT.
Clean Edge
Frame (Comes
with Unit)
Nailing flanges ad-
justed forward to ma-
terial thickness
Finish material to this edge when using
the Clean Edge Frame

20 Mansfield L850B ST Woodfire
installation
OPTIONAL FAN KIT INSTALLATION
L850B ST
12.19.16
1
919-751
LISTINGS AND CODE
APPROVALS
This Fan Kit has been approved for use with
Mansfi eld L850B ST.
Check with your local building code agency
before you begin your installation to ensure
compliance with local codes, including the
need for "permits" and follow-up inspections.
If any problems are encountered regarding
code approvals, or if you wish clarifi cation on
any of the instructions contained here, contact
your local dealer.
OPTIONAL FAN KIT INSTALLATION
GENERAL
INFORMATION
The Fan Kit increases the eff ectiveness of
your fi replace by dispersing warm air from the
fi replace to remote locations in the same room
or other rooms in your home.
Up to two kits may be installed on the fi replace.
Important Installation Notes
1) The appliance installation must conform with
local codes and installation codes.
2) The appliance when installed, must be
electrically grounded in accordance with local
codes.
3) This kit is tested and safe when installed
in accordance with this installation manual.
Please read all instructions before starting
installation and follow all instructions carefully
during installation.
4) Installation of this kit must be performed by
a qualified service technician.
5) The Fan Kit must be installed only as speci-
fi ed. Any modifications of the kit or components
will void the warranty and may cause a fi re
hazard.
6) Plan the location of the fi replace and the
warm air duct runs, see diagram 1 as a guide
for possible duct runs and locations.
Diagram 1: Guide for possible air duct runs and
locations. Keep duct length and number of bends
to a minimum. Maximum duct length is 9.0m.
The Fan Kit 946-591 does not contain any fl ue-
ing a separate Flex Kit is required 946-596. This
Flex Kit contains one length of 4.5 metres of fl ex
fl ueing. If 9.0 metres of fl ex ducting is required
you will need to purchase an additional Flex Kit.
MINIMUM FRAMING
CLEARANCES
* Wall studs must be 407mm on centre for
mounting fan housing.
* Fan Housing: Maintain a (6mm) clearance
from fan housing to combustible material.
* Wall Registers must be 102mm above fl oor
and / or 102mm below ceiling.
1) Determine the location of the air register/fan
housing assembly. Cut a 121mm x 406mm hole
between framing members (wall studs or fl oor
joists). Maintain a 6mm clearance from fan housing
to combustible material. See Framing Clearances
section.
Minimum Fan Duct
Clearances
The fan ducting requires a minimum of
25mm clearance to combustibles.
Minimum 102mm
from fl oor
Minimum 102mm
from ceiling
NOTE: Airflow through the duct system is affected
by the duct length and number of bends. Keep
the length and bends to a minimum to maximize
performance.
Item No. Description No Description
1 240V Fan As-
sembly
7 Aluminum Flex 4.5m
2 Duct Flange-
Fan
8 Duct Mounting Plate
3 Adapter Round
to Oval
9 Duct Flange-Stove
4 Angle Bracket 10 Sidewall Grille
5 Junction Box 11 Cable Clamp
6Wall Adapter
Plate