MF FIRE NOVA 2 User manual

NOVA 2 AND NOVA 2 TOWER
OWNER’S MANUAL
Safety Notice: Please save these instructions for future
reference. Please read this entire manual before you install and
use your new room heater. Failure to follow instructions may
result in property damage, bodily injury, or even death. Contact
local building or fire officials about restrictions and installation
inspection requirements in your area. Do not install Nova 2 in a
mobile home!
Manufactured by:
MF Fire, Inc.
3031 Washington Blvd STE G,
Baltimore, MD, USA
Report Number F20-619

Table of Contents
Table of Contents 1
Safety Precautions 3
Installation 3
Operation 4
Maintenance 5
Features and Specifications 6
Configurations 6
Dimensions 7
Heating Specifications 8
Emissions and Efficiency 8
Safety Listings 8
Stove Installation 9
Planning the Installation 9
Stove Placement Requirements 10
Minimum Clearance Requirements 11
Floor Protection Requirements 13
Chimney Connector Requirements 14
Chimney Requirements 15
Chimney Termination Requirements 16
Special Installation: Exterior Factory-Built Chimney 17
Special Installation: Masonry Chimney 18
Special Installation: Masonry Fireplace 19
Installing Legs, Heat Shield, and Ash Lip (Optional) 20
Configuring the Optional Top or Rear Vent 22
Installing the Air Inlet Pipe 24
Installing the Bypass Handle 25
Installing the Ceramic Fiberboard and Fire Brick 26
Catalytic Combustor 27
Stove Top Thermometer 31
Installing the Room Blower Fan (Optional) 32
1 | Page Nova 2 Owner’s Manual | © MF Fire 2020

Installing Rear Heat Shield (Optional) 33
Initial Curing 34
Operation 35
Starting a Fire 35
Bypass 36
Controlling the Burn 37
Reloading 37
Wood Selection 37
Ordinary Operating Sounds 37
Regular Maintenance and Troubleshooting 38
Glass 38
Disposal of Ashes 38
Door Gaskets 39
Catalytic Combustor 39
Monthly Maintenance 40
Creosote – Formation and Need for Removal 40
Gasket 40
Annual Maintenance 41
Exterior Paint 41
Glass 41
Catalytic Combustor Replacement 42
Appendix A: Nova 2 Tower Assembly 43
Appendix B: Lifetime Limited Warranty 48
Nova 2 Owner’s Manual | © MF Fire 2020 Page | 2

Safety Precautions
Installation
Nova 2 must be properly
installed to prevent house fires.
Please strictly adhere to the
installation instructions.
Nova 2 must be connected to a
listed high temperature chimney
or approved masonry chimney
with liner.
We recommend you use smoke
and CO detectors.
Do not connect this unit to a
chimney flue serving another
appliance.
Contact your local building
officials to obtain information on
any local wood stove
installation requirements.
Carefully route all power cords
through to avoid contact with
hot stove surfaces.
Do not connect to or use Nova
2 in conjunction with any air
distribution ductwork unless
specifically approved for such
installations.
3 | Page Nova 2 Owner’s Manual | © MF Fire 2020

Operation
Nova 2 is hot while in operation.
Keep children, clothing and
furniture away as contact may
cause skin burns.
Do not touch Nova 2 while hot.
Young children should be
supervised around Nova 2.
Keep all flammable objects
(fabrics, paper, wood, etc.) at
least 1 yd (1 m) from the front of
the Nova 2.
Nova 2 has been designed for the
burning of cordwood only. Do not
attempt to burn any other type of
fuel in Nova 2.
Do not burn garbage or
flammable fluids such as
gasoline, naphtha or engine oil.
Do not use chemicals or fluids to
start the fire.
Never use gasoline, gasoline-type
lantern fuel, kerosene, charcoal
lighter fluid, or similar liquids to
start or "freshen up" a fire in this
stove. Keep all such liquids well
away from the stove while it is in
use.
The viewing door of Nova 2 must
be shut and latched during
operation.
Do not use additional grates,
andirons, or other means for
supporting the fuel.
Never obstruct airflow
through the inlet vents or
exhaust vents.
This wood heater has a
manufacturer-set minimum
low burn rate that must not
be altered. It is against
federal regulations to alter
this setting or otherwise
operate this wood heater in a
manner inconsistent with
operating instructions in this
manual.
This wood heater contains a
catalytic combustor, which
needs periodic inspection
and replacement for proper
operation. It is against federal
regulations to operate this
wood heater in a manner
inconsistent with operating
instructions in this manual, or
if the catalytic element is
deactivated or removed.
Never over-fire Nova 2, as it
could lead to a house fire. If
the unit or chimney connector
glows, you have over-fired
the unit.
Nova 2 Owner’s Manual | © MF Fire 2020 Page | 4

Maintenance
Allow Nova 2 to cool before
conducting any maintenance.
Never attempt to modify or repair
the appliance beyond instructions
given in this manual.
Empty the ash regularly and
dispose of it in a metal
container with a tight lid.
Inspect the chimney connector
at least twice monthly.
5 | Page Nova 2 Owner’s Manual | © MF Fire 2020

Features and Specifications
Configurations
Nova 2 Nova 2 Tower
Nova 2 is available in two configurations, Nova 2 and Nova 2 Tower.
Nova 2 can be optionally equipped with 3” (standard, shown above),
6”, or 9” legs. Nova 2 Tower is available with no legs (standard,
shown above) or 6” legs.
Additionally, both Nova 2 and Nova 2 Tower can be used in either a
rear vent or a top vent configuration, to best fit your home and
preferences.
Nova 2 Owner’s Manual | © MF Fire 2020 Page | 6

Dimensions
Dimensions shown are for the standard configurations. All
clearances, front, side, corner, back and top, are measured from the
largest dimensions.
7 | Page Nova 2 Owner’s Manual | © MF Fire 2020

Heating Specifications
Nova 2 is equipped with a 2.4 ft.3 firebox and accepts logs up to 22”
in length.
Nova 2 has a 2,500 sq. ft. (175 m2) approximate maximum heating
capacity. Heating capacity will vary depending on the home's floor
plan, degree of insulation, and the outside temperature.
Nova 2 has a 35,000 BTU per hour (10 kW) EPA certified heat
release rate, with actual heat release rates ranging from 13,000 to
75,000 BTU per hour (4 to 22 kW) depending on user loading and
reloading.
Emissions and Efficiency
U.S. Environmental Protection Agency certified to comply with 2020
particulate emission standards for single burn rate heaters. This
single burn rate wood heater is not approved for use with a flue
damper. Certified average emissions rate of 1.93 g/hr and a
maximum tested efficiency of 81% LHV and an HHV efficiency of
75.2% tested to EPA Method 28R and ASTM E2515-11.
Safety Listings
Nova 2 is available for sale in the United States and Canada has
been listed with PFS-TECO and is tested and compliant in
accordance with UL 1482 – 2011(R2015), ULC-S627-00 (R2016),
and ULC S628-93 (R2016)
Label
Nova 2 comes with a metal certification label on a chain affixed to the
bottom back of the stove. This label is in english and french. For
safekeeping, the label may be affixed to the air duct of the stove
during installation.
Nova 2 Owner’s Manual | © MF Fire 2020 Page | 8

Stove Installation
Safety Notice: Please read this entire manual before you install
and use your new room heater. Failure to follow instructions
may result in property damage, bodily injury, or even death.
Contact local building or fire officials about restrictions and
installation inspection requirements in your area. Do not install
Nova 2 in a mobile home!
Planning the Installation
Proper care and attention to service helps to protect you from
unnecessary fires and carbon monoxide poisonings. To get the best
service and wood stove installation for your Nova 2 wood stove, we
recommend Installers or Chimney Sweeps certified by the National
Fireplace Institute (NFI) or the Chimney Safety Institute of America
(CSIA).
To locate one of the more than 2,000 active NFI or CSIA Certified
installers across North America, please use the installer locator on
our website: https://mffire.com/installers/
Check with your local building officials and your home insurance
company before installation. When this room heater is improperly
installed, a house fire may result. To reduce the risk of fire, follow the
installation instructions. Contact local building or fire officials about
restrictions and installation inspection requirements in your area.
If there are any major dents or other damage to your stove, please
report to MF Fire prior to installation.
9 | Page Nova 2 Owner’s Manual | © MF Fire 2020

Stove Placement Requirements
Nova 2 must be placed in a room with a source of fresh air.
Nova 2 must be placed so that no combustibles are within, or can
swing within 36" (914mm) of the front of the stove (drapes, doors,
etc.).
Caution: Avoid makeshift compromises during stove placement
or installation. Failure to follow instructions may result in
property damage, bodily injury, or even death.
Nova 2 Owner’s Manual | © MF Fire 2020 Page | 10

Minimum Clearance Requirements
Nova 2 may be installed as a top vent with a ceiling exit in either a
standard or corner configuration, or as a rear vent with a direct rear
exit. The minimum clearance requirements are listed in the table
below. Clearances may be reduced following methods in NFPA 211,
listed wall shields, pipe shields, or other means approved by local
building or fire officials. Rear clearances with optional rear heat shield
are from the heat shield surface. For more information on heat shield
installation, see section on heat shield installation.
Top vent, ceiling exit
Single Wall
Connector
Pipe
Double Wall
Connector
Pipe
Double Wall
Connector Pipe
with
Rear Heat Shield
A
Sidewall to unit
22” (559 mm)
20” (508 mm)
20” (508 mm)
B
Backwall to unit
20” (508 mm)
14” (356 mm)
6” (152 mm)
C
Sidewall to connector
31” (787 mm)
29” (736 mm)
29” (736 mm)
D
Backwall to connector
23” (584 mm)
17” (432 mm)
9” (229 mm)
E
Corner to unit
14” (356 mm)
9” (229 mm)
-
F
Corner to connector
23” (585 mm)
18” (457 mm)
-
11 | Page Nova 2 Owner’s Manual | © MF Fire 2020

Rear vent, rear exit
Single Wall
Connector Pipe
G
Sidewall to unit
22” (559 mm)
H
Backwall to unit
16” (406 mm)
I
Sidewall to connector
31” (787 mm)
J
Backwall to connector
16” (406 mm)
Nova 2 Owner’s Manual | © MF Fire 2020 Page | 12

Floor Protection Requirements
Nova 2 must be installed on a non-combustible surface or with
adequate floor protection. Floor protection must extend around the
front, sides, and rear of the stove, according to listed clearance
requirements below.
Floor Protection Clearances
K
Floor protection from front
16”US/18” CAN (406/457 mm)
L
Floor protection from side
8” (203 mm)
M
Floor protection from
chimney connector
2” (51 mm)
Floor protection must be listed to UL 1618. Floor protection must be
made of a non-combustible material and at least 0.018” (0.45 mm)
thick. For Nova 2 equipped with various leg heights and with or
without a 6” ash lip, floor protection requirements are as in the Table
below. ‘R’ refers to the thermal rating of the floor protection, while
Type 1 floor protection requires ember protection only.
Leg Height
With
Ash Lip
Without
Ash Lip
3”
R = 1.35
R = 2.0
6”
Type 1
R = 1.35
9”
Type 1
Type 1
Tower
Type 1
Type 1
13 | Page Nova 2 Owner’s Manual | © MF Fire 2020

Chimney Connector Requirements
A chimney connector is required from the flue collar of the stove to
the factory-built chimney or a masonry chimney. The chimney
connector must be 6” (152 mm) diameter and at minimum 24 gauge
black steel. Aluminum or galvanized steel is not allowed – these
materials cannot withstand the flue temperatures and may give off
toxic fumes when heated.
The chimney connector may not pass through a ceiling, attic, roof,
closet, or similar other concealed space, or a floor or ceiling. Per,
ULC, where passage through a wall, or partition of combustible
construction is desired, the installation shall conform to
CAN/CSA-B365, Installation Code for Solid-Fuel- Burning Appliances
and Equipment
Use listed UL 103 HT chimney – see “Chimney Requirements for
details. DO NOT USE CONNECTOR PIPE AS CHIMNEY.
The chimney connector should be as short and direct as possible. No
more than 180o of elbows (two 90o elbows or two 45o and one 90o
elbow, etc.) may be used for the entire chimney system. Horizontal
runs should slope upwards at least 1/4” (6 mm) per foot and be a
maximum 36” (914 mm) long.
NOTE: Additional elbows may be allowed if draft is sufficient.
Whenever elbows are used the draft is adversely affected. Additional
chimney height may be required to boost draft.
The chimney connector must be installed with the crimped end
pointing downwards. This prevents creosote or condensation from
leaking to the exterior of the pipe.
The chimney connector must be fastened to the stove and each
adjoining section and kept clean.
Nova 2 Owner’s Manual | © MF Fire 2020 Page | 14

Chimney Requirements
Do not connect Nova 2 to a chimney flue serving any other appliance
or use in conjunction with any air distribution ductwork, unless
specifically approved.
This room heater must be connected to:
1. A 6” (150 mm) diameter, UL 103 HT chimney, from a single
manufacturer
OR
2. A code approved masonry chimney with a flue liner.
Standard Chimney Arrangement
A. Chimney termination
a. Minimum height: 15’ (4.5m)
b. Maximum height: 33’ (10 m)
B. Roof penetration
C. Chimney sections
D. Ceiling penetration
E. Chimney connector
15 | Page Nova 2 Owner’s Manual | © MF Fire 2020

Chimney Termination Requirements
The chimney must have an approved cap (to prevent water from
entering).
The chimney must not be located where it could become plugged by
snow or other material.
The chimney must terminate at least 3' (914 mm) above the roof and
at least 2' (610 mm) above any portion of the roof within 10' (3 m).
Nova 2 Owner’s Manual | © MF Fire 2020 Page | 16

Special Installation: Exterior Factory-Built Chimney
Nova 2 may be used in conjunction with an exterior factory built
chimney provided that the chimney meets UL 103 HT requirements.
Special care must be taken regarding the wall thimble, or penetration
from the chimney connector pipe to the exterior chimney, if the wall
thimble must pass through an exterior wall. Here all chimney
manufacturer’s instructions must be followed, including guidance on
spacing to combustible surfaces, piping requirements, and liner
requirements. Check with local authorities before installation to
ensure all requirements are met.
Floor protection is required 2” on both sides of the chimney connector
for any horizontal runs.
17 | Page Nova 2 Owner’s Manual | © MF Fire 2020

Special Installation: Masonry Chimney
Nova 2 may be used in conjunction with a masonry chimney provided
all installation instructions are followed.
We strongly recommend a full reline when installing the Nova 2 in a
masonry chimney. If the chimney does not have a clay tile liner, a full
reline is required. The chimney must be clean, undamaged, and meet
all local building codes.
Special care must be taken regarding the wall thimble, or penetration
from the chimney connector pipe to the masonry chimney, if the wall
thimble must pass through a combustible exterior wall. Here all
chimney manufacturer’s instructions must be followed, including
guidance on spacing to combustible surfaces, piping requirements,
and liner requirements. Check with local authorities before installation
to ensure all requirements are met.
Nova 2 Owner’s Manual | © MF Fire 2020 Page | 18

Special Installation: Masonry Fireplace
Nova 2 may be used in conjunction with a masonry fireplace provided
all installation instructions are followed.
The entire fireplace must be clean, undamaged, and meet all local
building codes. This installation requires a full reline. The liner must
be a stainless steel chimney connector or flexible vent pipe. Follow
the liner manufacturer’s instructions for installation and support.
19 | Page Nova 2 Owner’s Manual | © MF Fire 2020