BuckMaster 81 User manual

FIREPLACE INSERT & FREESTANDING
MODEL 81
NON-CATALYTIC UNIT
FEATURES
PREPARATIONS INSTALLATION
OPERATION MAINTENANCE SAFETY
SAFETY NOTICE
IF THIS HEATER IS NOT PROPERLY INSTALLED, A HOUSE FIRE MAY
RESULT. FOR YOUR SAFETY, FOLLOW THE INSTALLATION INSTRUCTIONS.
CONTACT THE AUTHORITY HAVING JURISDICTION (SUCH AS MUNICIPAL
BUILDING DEPARTMENT, FIRE DEPARTMENT, FIRE PREVENTION BUREAU,
etc.) CONSULT BEFORE INSTALLATION TO DETERMINE THE NEED TO
OBTAIN A PERMIT. KEEP THESE INSTRUCTIONS FOR FUTURE USE.
TESTED AND LISTED BY: PFS/TECO, COTTAGE GROVE, WI
MANUFACTURED BY NEW BUCK CORPORATION
200 ETHAN ALLEN DRIVE
P.O. BOX 69
SPRUCE PINE, N.C. 28777
www.buckstove.com Revised May 2020

TABLE OF CONTENTS
Wood Stove Description ............................................................................................................... 2
Important Instructions................................................................................................................... 3
SECTION I: Introduction ............................................................................................................. 4
SECTION II: Masonry Insert Installation..................................................................................... 5
Chimney Heights .......................................................................................................................... 6
Floor Protection ............................................................................................................................ 7
Installation Preparation / Masonry Fireplace Installation Options ............................................. 10
Mounting Trim Panels ................................................................................................................ 12
SECTION III: Pre-Fab Insert Installation................................................................................... 15
SECTION IV: Residential Freestanding Installation.................................................................. 16
Freestanding Installation Clearances .....................................................................................24-25
Installation of Close Clearances Shields..................................................................................... 26
SECTION V: Freestanding Permanently Located Manufactured Home Installation................. 27
Outside Air Installation............................................................................................................... 31
SECTION VI: Wood Heater Safety............................................................................................ 34
SECTION VII: Operation/Efficiency ......................................................................................... 36
Guide To Different Burning Qualities Of Wood ........................................................................ 37
MANTINACE: Door Gasket Replacement ............................................................................... 38
Brick Layout ............................................................................................................................... 39
Secondary Air Tube Replacement .............................................................................................. 40
Electrical Replacement Motor / Thermostat / Rheostat Replacement ........................................ 41
Electrical Wiring Diagram/ Room Air Blower Operation ......................................................... 42
Troubleshooting .......................................................................................................................... 44
Parts List ..................................................................................................................................... 45
Warranty ..................................................................................................................................... 46

Page 2
EPA COMPLIANCE STATUS
This manual describes installation and operation of the New Buck Corporation Model 81 wood heater.
This heater meets the U.S. Environmental Protection Agency’s Emission limits for wood heaters sold
after May, 15 2020. Under specific test conditions, this heater has been shown to deliver heat at rates
ranging from approximately 13,800 to 59,500 BTU/hr. A weighted average was used to calculate the
overall efficiency across all of the burn rate categories using the higher heating value (HHV 69.8%).
MODEL 81 WOOD STOVE
1. Secondary air tubes
2. Blower control (rheostat)
3. Primary air control
4. Warm air outlets
5. Baffles (interior of stove)
6. Air inlet
7. Door
8. Hearth extension
9. Power cord
10. Legs
11. Automatic/off/man. switch
12. Brass cap
13. Hinge Block
14. Brass overlays
15. Brass overlay mounting
screws
16. Glass clips
17. Hearth Brass
18. Door Gasket
19. Side glass
20. Leveling screws
21. Firebrick
22. Motor
23. Motor mount bracket
24. Cover Door
25. Cover door screws
26. Shot gun air box
27. Ash pan
28. Disc thermostat
29. Door handle & brass spring handle
30. Air wash screen
31. Glass gasket
32. Cover door hinge
33. Magnet holder
34. Cover door Magnet
35. Door latch
36. Door latch screw
37. Top Baffle Board
38. Hinge pins
39. 6" Flue exit
(4)
(30)
(15)
(18)
(14)
(35)& (36)
(19)
(29) (25)
(3)
(11)
(2)
(9)
(28)
(20)
(24)
(22)
(21)
(23)
(32)
(27)
6
(10)
(34)
(33)
(17)
(8)
(31) (16)
(38)
(13)
(12)
(5)
(37)
(26)
(7) (1) (39)

Page 3
INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
MODEL 81
BEFORE INSTALLING YOUR NEW BUCK STOVE,
READ THE ENTIRE INSTRUCTION MANUAL
IMPORTANT INSTRUCTIONS
WARNING
THIS UNIT GENERATES HIGH HEAT, SO TREAT IT WITH CARE. HOT WHILE IN
OPERATION. KEEP CHILDREN, CLOTHING AND FURNITURE AWAY. CONTACT
MAY CAUSE SKIN BURNS. DO NOT USE CHEMICALS OR FLUIDS TO START THE
FIRE. DO NOT BURN GARBAGE OR FLAMMABLE FLUIDS. DO NOT CONNECT TO
ANY DISTRIBUTION DUCT OR SYSTEM. READ ALL INSTRUCTIONS BEFORE
INSTALLING AND USING THE APPLIANCE. FAILURE TO FOLLOW INSTRUCTIONS
MAY RESULT IN PROPERTY DAMAGE, BODILY INJURY OR EVEN DEATH. SAVE
THESE INSTRUCTIONS FOR FUTURE REFERENCES.
• The New Buck Corp. non-catalytic Model 81 has been tested to UL 1482 Standards and
listed by PFS/TECO. Standard for Room Heaters, Solid Fuel Type.
• Install and operate your unit according to instructions provided in this manual. Local build-
ing codes may apply; therefore, contact your local building inspector for necessary installa-
tion requirements and permits which may go beyond these instructions. Contact your insur-
ance company for coverage and installation inspection.
• DO NOT INSTALL IN SLEEPING ROOMS.
• NOTE: When burning any unit or appliance that combusts fuel for heat, such as coal,
oil, wood or natural and (L.P.) liquid petroleum gas. Correctly place monitors in those
areas that are expected to produce Carbon Monoxide (CO). Consult with your local
fire safety officials to learn more
• Examine the masonry fireplace and chimney prior to installation of fireplace accessory to
determine that construction meets the minimum fireplace construction requirements
illustrated in the instructions. Make sure that it is free from cracks, loose mortar, creosote
deposits and other blockage, or other signs of deterioration.
CAUTION
DO NOT USE MORE THAN ONE STOVE TO A CHIMNEY. DO NOT USE A FLUE
INTENDED FOR A GAS APPLIANCE. DO NOT CONNECT THIS UNIT TO A CHIMNEY
FLUE SERVING ANOTHER APPLIANCE. DO NOT CONNECT TO ANY AIR
DISTRIBUTION DUCT OR SYSTEM.
• A factory-built pre-fabricated chimney may be used for your units when installed in
compliance with manufacturer's specification and uniform building code.

Page 4
CAUTION
YOUR CHIMNEY MUST BE CORRECTLY SIZED. A CHIMNEY THAT IS TOO SMALL
OR LARGE IN DIAMETER, OR TOO SHORT, CAN CAUSE YOUR STOVE TO SPILL
SMOKE WHEN THE DOOR IS OPENED.
SECTION I
INTRODUCTION
Your new MODEL 81 is a non-catalytic unit designed to meet the most stringent
emissions standards without the use of a catalytic combustor. This effect is achieved through
the use of a secondary air which is mixed with primary air in unit's firebox.
For peak performance, we suggest the use of natural seasoned hard wood, loading wood from
front to rear.
NOTE: Soft woods such as pine, create more creosote, clogging of chimney and produce a less effi-
cient burn performance.
You should not burn trash or garbage, artificial or paper logs, gift wrapping, treated or painted
wood or any type of coal or flammable fluids.
DO NOT USE CHEMICALS OR FLUIDS TO START THE FIRE.
DO NOT BURN GARBAGE OR FLAMMABLE FLUIDS.”
The primary air, which is controlled by the user, burns the wood. Secondary air is admitted into
firebox through secondary air tubes at top of firebox. This secondary air burns impurities in
smoke released from the initial wood burning. The temperature necessary for this combustion is
maintained through the firebrick refractory. If any more technical information is necessary,
contact your local dealer.
This heater is equipped with a standard room air blower. For operation and use of these
electrical assemblies, see instructions provided in this manual starting on page 37.
*Model 81: Motor Assembly—MA 910714

Page 5
SECTION II
MASONRY INSERT INSTALLATION
The Model 81 may be installed using an all masonry fireplace built in accordance with the
Uniform Building Code and National Fire Protection Association (NFPA). The first step in
this type of installation is to determine acceptability of fireplace and chimney for use with a
woodstove. Both construction and condition of fireplace are important
considerations when installing a woodstove. The chimney should extend at least 3' above roof
and at least 2' above any point of roof within 10'. (See Page 6 Figure 4).
CAUTION
REMEMBER TO HAVE YOUR CHIMNEY INSPECTED FOR LEAKS AND BLOCKAGE
BEFORE YOU INSTALL YOUR STOVE. DO NOT CONNECT THIS UNIT TO A
CHIMNEY FLUE SERVING ANOTHER APPLIANCE.
MINIMUM CLEARANCE MASONRY INSERT
A. Side Wall Combustible
B. Front Floor Protector
C. Side Floor Protector
D. Side Wood Trim
E. Top Wood Trim
F. Mantel or Brackets
12"
16"
8"
7"
10"
21"
MODEL 81
1. The hearth must be of masonry construction and must extend a minimum of 16" in front of
firebox opening and a minimum of 8" to either side of firebox opening.
2. If there is not minimum hearth protection from front of firebox opening and front of
masonry hearth, a floor protector must be used in front of hearth to protect combustible
materials. The floor protector must have a minimum R-Value of 1.1 non-combustible
material.(See Page 7).
F
B
A
E
C
D
F
B
A
E
C
D

Page 6
Stack wood in crisscross pattern
under a shelter to allow air flow
to dry wood and to keep wood
from rain. Green wood may
have 50-60% moisture content.
Wood seasoned outside
uncovered may have 40%
moisture content. Wood
properly seasoned in a covered
environment will have less than
20% moisture content.
3 FT.
2 FT.
LESS THAN
10 FT.
2 FT.
10 FT.
GREATER
THAN
10 FT.
3 FT.
METAL
CHIMNEY
MASONRY
CHIMNEY
2 FT. MINIMUM HEIGHT ABOVE THE
ROOF WITHIN 10 FT. HORIZONTALLY
CHIMNEY “10 FT.” RULE (MINIMUM HEIGHTS)
NOTE: MINIMUM CHIMNEY HEIGHT 15 FT.
CHIMNEY HEIGHTS
HOW TO STACK WOOD
FIGURE 4
FIGURE 5

Page 7
MINIMUM CLEARANCES
Floor Protection:
When installing a heater, a floor protector must be used. Floor protector must have a minimum
of 1.1 R-Value non-combustible material.
How to use alternate materials and how to calculate equivalent thickness
Most people have heard of R-Values, which are used for rating common building materials such
as fiberglass insulation and glass. However, many texts which cover stoves and fireplaces use K
-Values instead of R-Values. Although the two are somewhat related, there are differences.
R-Value: The higher the R-Value, the better the insulating properties of the subject materials. R
-Values are most often used to express the thermal resistance (ability to stop heat flow) of a
building wall, ceiling or floor. Because of this, most R-Values are calculated at normal tempera-
tures of approx. 75 F. R-Values are easy to add together so calculating the total R-Value of a
wall is simply done by adding the values for the sheetrock, insulation, sheathing and siding.
K-value is a measure of heat conductivity of a particular material. Specifically, it is the measure
of the amount of heat, in BTUs per hour, that will be transmitted through one square foot of ma-
terial that is one inch thick to cause a temperature change of one degree Fahrenheit from one
side of the material to the other. The lower the K-value for a material, the better it insulates. If
the K-value of the material is known, the R-value per inch can be determined by dividing 1 by
the K-value (R-value per inch = 1/K value). The LOWER a K-Value, the better its performance
as an insulator.
R or K values have nothing to do with whether a material is flame proof, flame resistant or
combustible. Styrofoam, cork, wood and polyester are just some examples of materials which
are good insulators but will burn or smoke dangerously when exposed to excess heat.
Technical - For those who desire to calculate their own K or R values, please use the following
formulas:
1. R value can be calculated by dividing the thickness by the K value.
For US calculations, we use inches as the unit of measurement.
“In the inch-pound units, thermal resistance is measured in degrees F times square feet of area
times hours of time per Btus of heat flow.”
R-value = thickness / K-value
2. K value is the inverse of the R-Value. If one is known, the other can be calculated.
“units of Btu-inch/hour per square foot per degree F”
Thickness/k value = R value
or:
Divide the inches of thickness by R.
k= inches of thickness / R

Page 8
K-Value Example: A wood stove may call for a floor which has a K factor of 1 or less. A product such
as Micore 300 Board from USG has a K-Value of approx .43 per inch. Therefore a 1/2” thickness of this
board would have a K-Value of .86, which meets the requirement of our example stove.
R-Value Example: A stove or fireplace may call for an floor with an R-Value of 1.5. The same board
above is rated as having an R-Value of 2.33 for a one inch thickness. Therefore, 3/4” of the Micore 300
Board would meet the specifications for this stove.
Summary: R and K values are related, but K is the value commonly used for specifying materials for use
with stoves and fireplaces. Be sure that your choice of insulating material for high temperature applica-
tions is noncombustible.
With K values, the lower value is a better insulator. With R Values, the highest number is better.
For low profile hearths, it is best to use manufactured materials such as Micore and Cement Board
(Durock, Wonderboard, etc.) as these will allow hearth thicknesses of from 1/4” to 2” with most stoves
and fireplaces. Most other common building materials will require at least 3” of thickness and usually
much more.