Vermont Castings Jefferson JUVSR & JUVSM 3095 User manual

20003447 6/03 Rev. 6
Jefferson®
Vent Free Gas Heater
Models: JUVSR & JUVSM
3095, 3096, 3097, 3100,
3101, 3102, 3105, 3106,
3107, 3110, 3111, 3112
Homeowner’s Installation
and Operation Manual
INSTALLER: DO NOT DISCARD THIS MANUAL - LEAVE FOR HOMEOWNER
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410 Admiral Blvd. • Mississauga, Ontario, Canada L5T 2N6 • 905-670-7885
www.majesticproducts.com • www.vermontcastings.com
Vermont Castings, Majestic Products
This is an unvented gas-fired heater.
It uses air (Oxygen) from the room
in which it is installed. Provisions for
adequate combustion and
ventilation air must be provided.
Refer to Page 7.
INSTALLER / CONSUMER
SAFETY INFORMATION
WARNING: If the information in this
manual is not followed exactly, a fire
or explosion may result causing
property damage, personal injury or
loss of life.
Please read this manual before
installing and using appliance.
—Do not store or use gasoline or
other flammable 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 appli-
ance.
•Do not touch any electrical
switch; do not use any phone
in your building.
•Immediately call your gas
suppler from a neighbor’s
phone. Follow the gas
suppler’s instructions.
•If you cannot reach your gas
supplier, call the fire depart-
ment.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.

22
Vermont Castings Jefferson Vent Free Gas Heater
20003447
Installation and Operating Instructions .......................................................................................3
JUVS Dimensions ..............................................................................................................4
Clearance Requirements ...................................................................................................5
Hearth Requirements .........................................................................................................5
Gas Specifications .............................................................................................................6
Gas Inlet and Manifold Pressures ......................................................................................6
High Elevations ..................................................................................................................6
Odor During Operation.......................................................................................................6
Vent Free Features ............................................................................................................7
Fresh Air Requirements .....................................................................................................7
Assembly Procedures
Unpack the Stove...............................................................................................................9
Install Optional Fan Kit .......................................................................................................9
Install ON/OFF Switch......................................................................................................10
Thermostat Connections ..................................................................................................11
Connect the Gas Supply LIne ..........................................................................................11
Install Log Set ..................................................................................................................11
Install Stove Front ............................................................................................................12
Operation
Your First Fire ..................................................................................................................13
Pilot and Burner Inspection ..............................................................................................13
Flame & Temperature Adjustment ...................................................................................13
Flame Characteristics ......................................................................................................13
Lighting Instructions .........................................................................................................14
Troubleshooting ...............................................................................................................15
Maintenance
Firebox Cleaning and Inspection......................................................................................17
Cleaning Procedure .........................................................................................................17
Care of Cast Iron..............................................................................................................17
Replacement Parts.......................................................................................................................18
Optional Accessories
Fan Kits ............................................................................................................................20
Remote Controls ..............................................................................................................20
Warranty .......................................................................................................................................22
PLEASE READ THE INSTALLATION & OPERATING INSTRUCTIONS BEFORE USING APPLIANCE.
Thank you and congratulations on your purchase of a Vermont Castings stove.
IMPORTANT: Read all instructions and warnings carefully before starting installation. Failure to follow these
instructions may result in a possible fire hazard and will void the warranty.
Table Of Contents

3
Vermont Castings Jefferson Vent Free Gas Heater
20003447
Installation & Operating Instructions
In order to ensure safe and effective installation, this unit
must be installed only by a qualified agency, individual, firm,
corporation or company that is experienced in the installa-
tion, repair and servicing of this type of appliance and is
familiar with the building codes and installation techniques
appropriate in your area. Contact your hearth products
dealer or local gas supplier for the name of a qualified
service person.
IMPORTANT: Read this owner's manual carefully and
completely before trying to assemble, operate, or
service this heater. Improper use of this heater can
cause serious injury or death from burns, fire, explo-
sion, electrical shock, and carbon monoxide
poisoning.failure to follow instructions may result in
property damage, bodily injury or loss of life. This
manual contains important user information. Keep this
manual with the heater after installation is complete.
FOR SAFE INSTALLATION AND OPERATION,
PLEASE NOTE THE FOLLOWING:
1. Use only Natural Gas with JUVSRN/MN. Use only
Propane with JUVSRP/MP. Do not use any other
fuels.
2. Install only in accordance with the National Fuel
Gas Code, ANSIZ223.1/NFPA54-latest edition.
(Exception: Do not derate this appliance for
altitude. This appliance has been tested and listed
for use in altitudes up to 10,000 feet.)
3. Use only the installation instructions provided by
the manufacturer for this appliance. Installation
and repair should be done by a qualified service
person. The appliance should be inspected before
use and at least annually by a professional service
person. More frequent cleaning may be required
due to excessive lint from carpeting, bedding
material, etc. It is imperative that control compart-
ments, burners and circulating air passageways of
the appliance be kept clean.
4. Warning: Any change to this heater or its controls
can be dangerous. DO NOT make modifications to
any heater or associated parts.
5. DO NOT install this heater in a bedroom or bath-
room.
6. Due to high surface temperatures, DO NOT install
this heater
•in a recreational vehicle,
•where curtains, furniture, clothing or other
flammable objects are less than 36 inches from
the front, top or sides of the heater,
•in high traffic areas,
•in windy or drafty areas.
7. DO NOT place clothing or other flammable mate-
rial on or near the appliance.
8. DO NOT obstruct the top grille at all. Doing so will
cause high levels of carbon monoxide that will
lead to death.
9. This heater needs fresh, outside air ventilation to
operate properly. See Fresh Air Requirements on
pages 7 and 8.
10. If heater shuts off, heater may not have enough
fresh air ventilation. Provide more fresh air. If
heater keeps shutting off, refer to Troubleshoot-
ing .
11. DO NOT operate this heater
•where flammable liquids or vapors are used
or stored
•under dusty conditions.
12. The heater becomes very hot when operating.
Alert children and adults to stay away from hot
surfaces to avoid burns or clothing ignition. The
heater will remain hot for a time after shutdown.
Allow surface to cool before touching.
13. Carefully supervise young children when they are
in the room with the heater.
14. Do not use the heater if any part has been ex-
posed to or under water. Immediately call a
qualified service technician to inspect the room
heater and to replace any part of the control
system and any gas control which has been
under water.
15. DO NOT operate the heater if any log is broken or
damaged.
16. Turn heater off and let cool before servicing. Only
a qualified service person should service and
repair heater.
17. DO NOT operate this appliance with the safety
screen removed. If the safety screen is removed
from the appliance for service or cleaning, it must
be replaced before operating the heater.
NOTE: If any of the original wire as supplied with the
appliance must be replaced, it must be replaced with a
wire of at least 105°F temperature rating.
Carbon Monoxide Poisoning: Early signs of carbon
monoxide poisoning resemble the flu, with headaches,
dizziness,ornausea.Ifyouhavethesesigns,theheater
maynotbeworkingproperly.Getfreshairatonce!Have
theheater serviced.Some people are more affected by
carbon monoxide than others. These include pregnant
women, people with heart or lung disease or anemia,
those under the influence of alcohol, and those at high
altitudes.
CARBON MONOXIDE POISONING
MAY LEAD TO DEATH!
Proposition 65 Warning: Fuels used in gas, woodburning
or oil fired appliances, and the products of combustion of
such fuels, contain chemicals known to the State of Cali-
fornia to cause cancer, birth defects and other reproduc-
tive harm.
California Health & Safety Code Sec. 25249.6

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Vermont Castings Jefferson Vent Free Gas Heater
20003447
JUVS Dimensions
28¹⁄₂"
(724mm)
24"
(610mm)
3" (76mm)
14¹⁄₂"
(368mm)
C
L
8"
(203mm)
Valve
Inlet
3447
Fig. 1 Jefferson Vent Free dimensions.

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Vermont Castings Jefferson Vent Free Gas Heater
20003447
Clearance Requirements
Minimum Clearances to
Combustible Materials
Maintain clearance, (empty space), between combus-
tible materials and the heater as specified below for
the appropriate firebox shell being installed. Wall
FP599a
S
TUVWXY
A
B
C
D
E
F
G
Mantel Mantel from
Ref. Shelf Depth Ref. Stove Top
A12” (305mm) S 12” (305mm)
B10” (254mm) T 10” 254mm)
C8” (203mm) U 8” (203mm0
D6” (152mm) V 6” (152mm)
E4” (102mm) W 4” (102mm)
F2” (51mm) X 2” (51mm)
G1” (25mm) Y 1” (25mm)
Hearth Requirements
The JUVS must be installed on rigid flooring. If the
appliance is installed on any combustible surface other
than wood flooring, such as carpet or tile, a metal or
wood panel must be installed to extend the full length
and width of the unit.
WARNING
•Do not install this heater in a bathroom or
bedroom.
•Installation of this heater must conform with
Local Codes or in the absence of Local
Codes, with the National Fuel Gas Code,
ANSI Z223.1.
•This heater creates warm air currents. These
currents move heat to wall surfaces next to
the heater. Installing the heater next to vinyl
or cloth wall coverings or operating the
heater where impurities in the air such as
tobacco smoke exist, may discolor walls.
•Do not use a blower insert, heat exchanger
insert or other accessory not approved with
this heater.
A: Ceiling .................................................. 27¹⁄₂” (699mm)
B: Side Wall ................................................... 4” (102mm)
C: Rear Wall .................................................. 4” (102mm)
D: Max.Alcove Depth................................ 48” (1219mm)
BAC
D
ST101
A: Mantel Trim.................................12” (305mm)
B: Side Wall/Trim ..............................4” (102mm)
C: Rear Wall......................................4” (102mm)
D: Max. Mantel Depth .....................12” (305mm)
Alcove Clearances
ST103
B
C
D
B
A
Fig. 2 Minimum wall clearances

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Vermont Castings Jefferson Vent Free Gas Heater
20003447
Firebox weight / shipping 110 lbs.
The installation of your Vermont Castings stove must
conform with local codes, or in the absence of local
codes, with the National Fuel Gas Code ANSI
Z223.1 - latest edition. (EXCEPTION: Do not derate
this appliance for altitude up to 4,500 feet (1,370m).
Maintain the manifold pressure at 3.5” w.c. for
Natural Gas and 11.0” w.c. for LP Gas.
JUVSR & JUVSM Vent-Free
Certified to:
ANSI Z21.11.2a-2001
Unvented Heaters
High Elevations
Input ratings are shown in BTU per hour and are
certified without deration from elevations up to
4,500 feet (1,370m) above sea level.
Nuisance outages may occur at altitudes above
4,500 feet (1,370m) if dirt, dust, lint and/or cob-
webs are allowed to accumulate on burner and/or
ODS pilot. Monthly inspection and cleaning is
recommended for altitudes above 4,500 feet
(1,370m)
For elevations above 4,500 feet (1,370m), installa-
tions must be in accordance with the current
ANSI Z223.1 and/or local codes having jurisdic-
tion.
WARNING: Improper installation, adjust-
ment, alteration, service or maintenance can
cause injury or property damage. Refer to
this manual for correct installation and
operational procedures. For assistance or
additional information consult a qualified
installer, service agency, or the gas supplier.
Odor During Operation
Neither natural gas nor propane gas give off an odor
when burned. The nature of a vent free combustion
system, however, is such that odors may occasion-
ally be produced during heater operation when
impurities exist in the immediate area. Cleaning
solutions, paint, solvents, cigarette smoke, candles,
adhesives, new carpet or textiles, etc., all can create
fumes. These fumes may mix with combustion air
and can create odor. Such odors will disappear over
time, however the condition can be alleviated by
opening a window or otherwise providing additional
ventilation to the area.
Inlet Minimum 5.5” w.c. 11” w.c.
Inlet Maximum 14” w.c. 14” w.c.
Manifold Pressure 3.5” w.c. 10” w.c. (MP)
11” w.c. (RP)
Gas Inlet and Manifold Pressures
Natural LP (Propane)
This appliance may be installed in an aftermar-
ket* manufactured (mobile) home, where not
prohibited by state or local codes.
This appliance is to be used only with the type of
gas specified on the rating plate which is at-
tached to the rear panel. This appliance is not
convertible for use with other gases.
*Aftermarket: Completion of sale, not for purpose of resale, from
the manufacturer.
Gas Specifications
Max. Min.
Input Input
Model Fuel Gas Control BTU/h BTU/h
JUVSRN Nat. Millivolt 28,000 20,000
JUVSRP Prop Millivolt 28,000 21,000
JUVSMN Nat Millivolt 28,000 18,500
JUVSMP Prop Millivolt 28,000 18,500

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Vermont Castings Jefferson Vent Free Gas Heater
20003447
Vent Free Features
The JUVS Gas Heater is an unvented gas appliance
tested and listed to the ANSI standard Z21.11.2a.2001.
The Vent Free Gas Heater is configured to use Natural
Gas, (JUVSRN, JUVSMN ) or Propane (JUVSRP,
JUVSMP). Because these heaters are clean-burning
and highly energy-efficient, no venting system is
required.
The JUVS is shipped fully assembled with the
exception of the log set. The log set is assembled
during installation.
The JUVS is equipped with a Honeywell control valve
that allows thermostatic control, on/off switch or a
remote switch (not supplied).
The JUVS model incorporates variable regulators that
allow you to adjust burner heat output between HIGH,
(28,000 BTU), and LOW, (20,000 BTU). See the
Operation Section for details.
The standing pilot incorporates an Oxygen Depletion
System (ODS/pilot) which shuts off gas flow to the
burner in the event that sufficient fresh air becomes
unavailable for continued safe operation.
WARNING
This heater must have fresh air for proper opera-
tion. If it does not, poor fuel combustion could
result. Read the following instructions to ensure
proper fresh air supply for this and other fuel-
burning appliances in your home.
Fresh Air Requirements for Combustion
and Ventilation
Modern construction standards have resulted in homes
that are highly energy-efficient and that allow little heat
loss. Your home needs to breathe, however, and all
fuel-burning appliances need fresh air to function
properly and safely. Exhaust fans, clothes dryers,
fireplaces and other fuel burning appliances use the air
inside the building. If the available fresh air supply is
insufficient to meet the demands of these appliances,
problems can result.
The JUVS heater has specific fresh air require-
ments. You must determine that these requirements will
be met within the space where the appliance will be
installed. The following information will help you insure
adequate fresh air is available for the heater to function
properly.
Provide for Adequate Ventilation
Any space within a home can be classified in these
categories:
1) Unusually tight construction
2) Confined space
3) Unconfined space
First, determine which classification defines the in-
tended installation space.
Unusually Tight Construction
You must provide additional fresh air if the space falls
into this classification. Unusually Tight Construction is
defined as construction wherein:
a. Walls and ceilings exposed to the outside atmo-
sphere have a continuous water vapor barrier with a
rating of one perm or less, with openings gasketed or
sealed, and
b. weather stripping has been added on openable
windows and doors and
c. caulking or sealants are applied to areas such as
joints around windows and door frames, between sole
plates and floors, between wall and ceiling joints,
between wall panels, at penetrations for plumbing,
electrical and gas lines and at all other openings.
If your home meets all of the above criteria, you must
provide additional fresh air for the appliance as detailed
on Page 7.
If your home does not meet the above criteria, follow
the procedure below.
Determine If You Have a Confined or
Unconfined Space
Use the following formula to determine if you have a
confined or unconfined space.
Space is defined as the room in which you will
install the heater, plus any adjoining rooms with
doorless passageways or ventilation grilles between the
rooms.
The National Fuel Gas Code defines a confined
space as a space whose volume is less than 50 cubic
feet per 1,000 BTU per hour input rating (4.8m3 per Kw)
of the aggregate (total) input rating of all appliances
installed in that space and an unconfined space as a
space whose volume is not less than 50 cubic feet per
1,000 BTU per hour (4.8m3per Kw) of the aggregate
input rating of all appliances installed in that space.
Rooms communicating directly with the space in which
the appliances are installed, through openings not
furnished with doors, are considered a part of the
unconfined space.
1. Determine the volume of space (length x width x
height). Include adjoining rooms connected by doorless
passageways or ventilating grilles.
Example: A room that is 18’ x 12’ x 8’ has a volume of
1728 cubic feet. An adjoining open kitchen that is 10’ x
12’ x 8’ has a volume of 960 cubic feet.An adjoining
open dining room is 12’ x 12’ x 8’ with a volume of 1152
cubic feet. The total volume is 3840 feet. (1728 + 960 +
1152)

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Vermont Castings Jefferson Vent Free Gas Heater
20003447
2. Divide the volume of space by 50 cubic feet. The
result is the maximum BTU/hour the space can support.
Example: 3840 cubic feet divided by 50 = 76.8 or
76,800 BTU/hour.
3. Add the BTU/hour ratings of all fuel-burning appli-
ances installed in the same space, including the
following:
Gas Water Heater Gas Furnace
Gas Fireplace Logs Vent-free Gas Heater
Vented Gas Heater* Other Gas Appliances*
*Do not include Direct-vent appliances as these use
outdoor air for combustion and vent to the outdoors.
Example:
Gas Range 55,000 BTU/hour
Vent-free Logset +25,000 BTU/hour
Total 80,000 BTU/hour
4. Compare the maximum BTU/hour rating the space
can support with the total BTU/hour used by the appli-
ances.
Example: 76,800 BTU/hour the space can support
80,000 BTU/hour used by appliances
In this example, the maximum BTU/hour that the space
can support is less than the total used by the appli-
ances. The space is considered to be Confined Space.
Additional air must be provided to meet the require-
ments of the vent-free heater.
A confined space may be ventilated in two ways:
A. Open or provide at least two ventilating grilles to an
adjoining unconfined space. (Fig. 3)
Each of the two grilles must provide an opening of at
least 50 square inches, with all opening dimensions
being at least 3”. One grille must be within 12” of the
ceiling; the other within 12” of the floor. (If the total
exceeds 100,000 BTU/hour, additional grilles will be
needed.)
B. Vent the room directly to the outdoors. (Provide one
square inch of opening for each 4,000 BTU/hour)
For further information on ventilation guidelines and
sizing specifications, follow the National Fuel Gas
Code/NFPA 54/ANSI Z223.1, Section 5.3.
If the total BTU/hour used by the appliances is less
than the maximum BTU/hr the space can support, the
room meets the Unconfined Space criteria and no
further ventilation is needed.
WARNING
This heater shall not be installed in a confined
space unless provisions are made for adequate
combustion and ventilation air.
WARNING
If the area in which the heater may be operated is
smaller than that defined as an unconfined space,
provide adequate combustion and ventilation air by
one of the methods described in the National Fuel
Gas Code, ANSI Z223.1, 1992 Section 5.3.
Option 1 -
Vents to
Adjoining
Rooms Option 3 -
Vents to
Adjoining
Room
Option 2 -
Remove Door to
Adjoining Room
Fig. 3 Supplementing ventilation air.
VO370-2

9
Vermont Castings Jefferson Vent Free Gas Heater
20003447
Unpack the Stove
Remove the stove assembly from the shipping carton
and inspect it for loose or damaged parts. Do not install
this appliance if any parts are loose or if there is any
visual or suspected damage resulting from shipping or
handling. Report damage to your dealer/distributor
immediately. The log set is packaged in the box
shipped inside the firebox.
To remove the packaged log set from the firebox:
•Lift the stove front up and then swing the bottom out
and away to disengage it from the stove body. (Fig. 4)
Cut the wire tie securing the screen.
•Remove the screen frame. (Fig. 5)
•Remove box and set aside.
Contact your dealer if the burner is loose or damaged in
any way.
ST229b
Fig. 4 Remove stove front.
ST208b
Fig. 5 Lift screen from firebox.
Screen Hooks
Assembly Procedures
WARNING
Failure to position the parts in accordance with these
diagrams or failure to use only parts specifically
approved for use with this heater may result in
property damage or personal injury.
Optional Fan Kit Installation (2960/FK28)
1. Attach the fan to the rear shroud by engaging the
upper flange of the fan skirt under the lower edge of the
shroud and secure the skirt with the four screws and
one star washer provided. (Fig. 6,7)
ST241
Fig. 7 Correct position of fan skirt installation.
Upper
Flange
To Control
Valve
ST240
Fig. 6 Place upper flange behind lower edge of shroud.
Star Washer
CAUTION
Porcelain enamelled surfaces are fragile. Handle
porcelain enamelled castings tenderly. Familiarize
yourself with the assembly steps before you begin
and proceed with deliberation and care. If possible,
have assistance available.
Place enamelled castings on a soft, cushioned
surface until you are ready to assembly.
Avoid contact between the castings and other hard
surfaces or objects.

1010
Vermont Castings Jefferson Vent Free Gas Heater
20003447
MOTOR
SNAPSTAT
ON/OFF
RHEOSTAT
WHT
WHT
BLK
BLK BLK
GRN
BLK
ST236
Fig. 11 Fan wiring diagram.
ST347a
Fig. 10 Attach rheostat to control panel. Valve may look
different.
Rheostat
Retaining Nut
Control Knob
Pinch Grommet
to Remove
Snapstat
Bracket
Snapstat
Module ST468
Fig. 8 Remove snaptstat and grommet from bracket.
2. Disconnect the snapstat module from the leads
inside the snapstat bracket. (Fig. 8)
3. Bend open the snapstat bracket. use your fingers or
needle nose pliers to remove the black plastic grommet
from the bracket. Discard the grommet and bracket.
4. Secure the snapstat to the upper middle of the inner
shroud. (Fig. 9) NOTE: The snapstat location may be
reached through the front of the stove between the top
and the firebox or you may loosen the four screws
holding the rear shroud in place. Be sure to secure
shroud back into place before operation.
5. Connect the two wires to the two snapstat extension
leads attached to the inner shroud. You may coil excess
wire up inside the rear shroud.
6. Route the rheostat control switch and wire forward
under the stove. (Fig. 10) Use the wire tie to secure the
fan and rheostat wire harnesses together to the tubing
under the heater.
ST346a
Fig. 9 Attach snapstat to inner shroud.
Snapstat
Install ON/OFF Switch
(R Models only)
The switch assembly parts are found in the parts bag.
1. Attach switch assembly to left rear side of stove
shroud using two screws and existing holes in
shroud. (Fig. 12)
2. Run wires down back of stove, under bottom of rear
shroud to valve.
3. Attach wires to valve terminals. (Fig. 13)
TP TH
TPTH
ST228
Fig. 13 Attach switch wires to valve.
Existing Holes
Switch
Assembly
Screws ST315
Fig. 12 Attach switch assembly to rear shroud.

11
Vermont Castings Jefferson Vent Free Gas Heater
20003447
Decorative Grate ST223
Fig. 14 Install back, left and right logs.
1
23
Thermostat Wire / Gauge Maximum Run
18 40 feet
20 25 feet
22 16 feet
Thermostat Connection (optional)
(R Models only)
1. Install the wall thermostat in the desired location and
run the wires to the stove location. Terminate these
leads with 1/4” female connectors.
2. Connect the thermostat wires to the valve. (Fig. 13)
Use only a thermostat rated for 500 millivolts. Do
not use low voltage (24V) thermostats.
Check the table below for the appropriate gauge
thermostat wire to use for the length of lead required in
your installation.
4
5
1
3
2
Install the Log Set
1. Remove the logs from their packaging, and inspect
each piece for damage. DO NOT INSTALL DAM-
AGED LOGS.
2. Install the rear log by centering it side to side on
the sheet metal shelf at the back of the firebox.
(Fig. 14)
3. Install the left and right middle logs by
engaging holes on their bottoms with pins on the
burner brackets. (Fig. 14)
4. Loosely sprinkle the small package lava rocks
directly on top of the burner between the decorative
grate and the middle logs. Do not place any lava
rocks behind the middle logs. (Fig. 15)
5. Engage the upper log with the right middle log as
shown in Figure 15. Swing the top end toward the
rear of the firebox and rest on notch on top of rear
log. (NOTE: This log will touch the back of the
firebox.) Engage the top log with the upper log
and the left middle log. (Fig. 15)
Connect the Gas Supply Line
Check the Rating Plate attached by a steel cable to the
firebox, to confirm that you have the appropriate firebox
for the type of fuel to be used.
This appliance should only be con-
nected by a qualified gas technician.
Test to confirm manifold pressures as
specified below.
The Jefferson Heater and its individual shutoff
valve must be disconnected from the gas supply
piping during any pressure testing of that system
at test pressures in excess of 1/2 psig (3.5 kPa).
The Jefferson Heater must be isolated from the
gas supply piping system by closing its individual
manual shutoff valve during any pressure testing
of the gas supply piping system at test pressure
equal to or less than 1/2 psig.
There must be a gas shutoff between the stove
and the supply.
In order to connect Natural Gas, use a fitting with
3/8” NPT nipple on the valve side and 1/2” natural
gas supply line with an input of 28,000 BTUs at a
manifold pressure of 3.5” and minimum inlet
supply for adjustment of 5.5” W.C.
In order to connect Propane, use a fitting with 3/8”
NPT nipple on the valve side and 1/2” propane
gas supply line with an input of 28,000 BTUs at a
manifold pressure of 11.0” and minimum inlet
supply for adjustment of 11.0” W.C.
CAUTION
Gas connection should be made in accordance with
current National Fuel Gas Code, ANSI Z223.1. Since
some municipalities have additional local codes, be
sure to consult you local authority.
Connect the gas supply and test for leaks. Use a 50/50
solution of liquid soap and water to test for leaks at gas
fittings and joints. NEVER test with an open flame.
Light the pilot according to the directions on page 14,
before going to the next step.

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Vermont Castings Jefferson Vent Free Gas Heater
20003447
Install the Stove Front
The Front Plate attaches to the stove by four steel tabs
that engage with corresponding cast ribs on the sides
and bottom of the stove body. Position the Front about
3” down from stove top and lift the plate to engage the
upper tabs behind the adjacent ribs on the sides. (Fig.
17) Then lower the plate into position, so that the
lower tabs engage with the corresponding ribs at the
bottom. (Fig. 18)
When properly installed, the bottom of the Stove Front
cannot be pulled away from the sides without also lifting
it.
Stove Side
Side Rib
Front Tab
Stove Front ST279
Fig. 180 Engage with side ribs.
Lava Rock ST224
Fig. 15 Install lava rock and upper logs.
4
5
ST225
Fig. 16 Completed log installation.
3”
Upper Tabs
Control
Door
Lower Tabs
Engage Ribs in
Bottom ST725
Fig. 17 Install stove front.

13
Vermont Castings Jefferson Vent Free Gas Heater
20003447
Operation
Your First Fire
Read these instructions carefully and familiarize
yourself with the burner controls of this heater.
The JUVSR uses a Honeywell control valve that allows
thermostatic, on/off switch regulation and has a sepa-
rate Piezo ignition button. (Fig. 20)
The JUVSM is equipped with an SIT control valve for
manual use only.
Locate the Pilot assembly to the right behind the
burner. (Fig. 21) Follow the lighting instructions on page
14 exactly.
For the first fire, allow the stove to operate continuously
for six hours without using the fan. During the first fire, it
is not unusual to smell some odor associated with new
logs, paint and metal being heated. Odors should
dissipate within a few hours or so, however, you can
open a window to provide plenty of fresh air to alleviate
this condition.
Pilot and Burner Inspection
Each time you light your heater, check that the pilot
flame and burner flame pattern are as shown in Figures
22 and 23. If flame patterns are incorrect, turn the
heater off. See Troubleshooting , page 15.
Follow regular maintenance procedures as described
on page 17.
Flame & Temperature Adjustment
For units equipped with ‘HI/LO’ valves, the flame
adjustment is accomplished by rotating the ‘HI/LO’
adjustment knob located near the center of the gas
valve. (Fig. 20, 21)
Flame Characteristics
It is important to periodically perform a visual check of
the pilot and burner flames. Compare them to the
illustration below. (Fig. 22, 23) If the flame patterns
appear abnormal contact a qualified service provider for
service and adjustment.
Thermopile*
Fig. 22 Correct Pilot Flame. (*JUVSM pilots do not have
Thermopile)
Pilot Orifice
ST117a
Fig. 23 Proper flame pattern with Regulator in HIGH
position.
ST116
ST232
Fig. 19 Pilot assembly location.
Natural
Pilot
LP Pilot
LO
HI
Turn
counterclockwise
to decrease
flame height
Turn clockwise
to increase
flame height
HV102
Fig. 20 Flame adjustment knob for Honeywell Valve.
HI
OFF
PILOT
LO
Turn
counterclockwise
to increase
flame height
Turn clockwise
to decrease
flame height
SIT 630
HV117
Fig. 21 Flame adjustment knob for Eurosit Valve.

1414
Vermont Castings Jefferson Vent Free Gas Heater
20003447
3. Open control access panel.
4. Push in gas control knob slightly and turn
clockwise to "OFF". Do not force.
5. Close control access panel.
1. STOP! Read the safety information above.
2. Turn off all electrical power to the fireplace.
3. For MN/MP/TN/TP appliances ONLY, go on to
Step 4. For RN/RP appliances turn the On/Off
switch to “OFF” position or set thermostat to
lowest level.
4. Open control access panel.
5. Push in gas control knob slightly and turn
clockwise to "OFF".
10. Push the control knob all the way in and hold.
Immediately light the pilot by repeatedly
depressing the piezo spark ignitor until a flame
appears. Continue to hold the control knob in for
about one (1) minute after the pilot is lit. Release
knob and it will pop back up. Pilot should remain
lit. If it goes out, repeat steps 5 through 8.
FOR YOUR SAFETY READ BEFORE LIGHTING
•If you cannot reach your gas supplier, call the
Fire Department
C. Use only your hand to push in or turn the gas
control knob. Never use tools. If the knob will not
push in or turn by hand, do not try to repair it, call a
qualified service technician. Applying force or any
attempted repair may result in a fire or explosion.
D. Do not use this fireplace if any part has been under
water. Immediately call a qualified service techni-
cian to inspect the heater and to replace any part of
the control system and any gas control which has
been under water.
A. This heater has a pilot which must be lit manu-
ally. When lighting the pilot follow these
instructions exactly.
B. BEFORE LIGHTING smell all around the heater
area for gas. Be sure to smell next to the floor
because some gas is heavier than air and will
settle on the floor.
WHAT TO DO IF YOU SMELL GAS
•Do not try to light any fireplace
•Do not touch any electric switch
• Do not use any phone in your building
•Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
To Turn Off Gas To Heater
Lighting And Operating Instructions
1. Turn the On/Off switch to Off position or set the
thermostat to lowest setting.
2. Turn off all electric power to the fireplace if
service is to be performed.
Lighting Instructions
6. Wait five (5) minutes to clear out any gas. Then
smell for gas, including near the floor. If you
smell gas, STOP! Follow "B" in the safety
information above. If you do not smell gas, go
to the next step.
7. Remove glass door before lighting pilot. (See
Glass Frame Removal section).
8. Visibly locate pilot by the main burner.
9. Turn knob on gas control counterclockwise
to "PILOT".
•If knob does not pop up when released, stop
and immediately call your service technician or
gas supplier.
• If after several tries, the pilot will not stay lit,
turn the gas control knob to "OFF" and call your
service technician or gas supplier.
11. Replace glass door.
12. Turn gas control knob to “ON” position.
13. For RN/RP appliances turn the On/Off switch to
“ON” position or set thermostat to desired setting.
14. Turn on all electrical power to the fireplace.
WARNING:If you do not follow these instructions exactly, a fire or explosion
may result causing property damage, personal injury or loss of life.
Euro SIT SIT NOVA Honeywell
PILOT
ON
OFF
ON
P
I
L
O
T
O
F
F
O
F
F
5
4
3
2
1
O
F
F
P
i
l
o
t
3/8" - 1/2"

15
Vermont Castings Jefferson Vent Free Gas Heater
20003447
Troubleshooting
Follow these procedures in the order presented.
WARNING
TURN OFF HEATER AND ALLOW TO COOL
COMPLETELY BEFORE SERVICING.
CONDITION POSSIBLE CAUSE SOLUTION
No spark at pilot when Ignitor is
operated. 1. Ignition Electrode is disconnected
from ignition wire, broken or
incorrectly positioned.
2. Ignitor wire is broken.
3. Bad Piezo Ignitor.
1. Inspect and re-connect, replace or
repair as necessary.
2. Replace wire.
3. Replace Piezo Ignitor.
The Ignitor Electrode sparks,
but Pilot does not light. 1. Gas supply is turned off or supply
line shut-off valve is closed.
2. Control Knob is not in PILOT
position.
3. Control Knob not pressed in while
in PILOT position.
4. Air present in gas lines.
5. Inlet supply pressure is not within
correct settings.
6. Other conditions that should be
identified only by a qualified gas
technician.
1. Turn on gas supply or open supply
line shut-off valve.
2. Turn Control Knob to PILOT.
3. Press Control Knob in while in the
PILOT position.
4. Continue holding in Control Knob
and repeat ignition procedure until
air is bled from the lines.
5. Call local gas supplier. Adjust inlet
supply pressure to specification:
NG; 5.5” w.c.-14.0”w.c. LP; 11.0”
w.c.-14.0”w.c.
6. Call qualified gas technician.
PILOT
ON
OFF
PILOT
ADJ
L
O
H
I
TPTH TH
TP
HI
OFF
PILOT
LO
Pilot/MainCon-
trol
Piezo Ignitor
Regulator PiezoIgni-
tor Pilot/Main Control
ST120
Fig. 24 JUVS Honeywell Control Valve Assembly. Fig. 25 JUVS SIT Control Valve Assembly.

1616
Vermont Castings Jefferson Vent Free Gas Heater
20003447
Troubleshooting cont’d.
CONDITION POSSIBLE CAUSE SOLUTION
Pilot lights but flame goes out
when Control Knob is released. 1. Control Knob not fully depressed or held in long enough.
2. Gas supply line shut-off valve is
not fully open.
3. Thermocouple connection is loose
at the Control Valve.
4. Pilot flame does not touch the
Thermocouple. (Figs. 26, 27)
This can be caused by:
A) Incorrect gas pressure, and/or
B) other conditions that should be
identified only by a qualified
service technician.
5. Thermocouple is damaged.
6. Control Valve is damaged.
1. Depress Control Knob fully and
hold in for a full 30 seconds.
2. Fully open gas supply line shut-off
valve.
3. Inspect and tighten securely.
4. A) Contact the local gas company.
Inlet supply pressure should be 5”
w.c.-8”w.c. for NG (5”w.c.-7”w.c.
over 8000 ft. elevation) and
11”w.c.-12”w.c. for LP. Adjust as
necessary.
B)Call local gas service techni-
cian.
5. Call local gas service technician.
6. Call local gas service technician.
Fig. 28 Correct LP Pilot Flame. Fig. 29 Correct NG Pilot Flame.
Pilot lights but Main Burner does
not. 1. Gas supply line shut-off valve is
not fully open.
2. Foreign material is blocking
Burner ports.
3. Main Burner orifice is clogged.
4. Thermostat or remote switch not
activated on JUVS.
5. Bad Thermopile.
1. Fully open gas supply line shut-off
valve.
2. Insptect and clear debris away
from Burner ports.
3. Call local gas service technician.
4. Set thermostat to higher tempera-
ture or check remote switch.
5. Call local gas service technician.
Main Burner shuts off and Pilot
flame goes out while in operation. 1. Insufficient fresh air.
2. Incorrect inlet supply pressure.
1. Determine that adequate ventila-
tion exists to provide sufficient
fresh air. Open a window or
provide additional ventilation. (See
Fresh Air Requirements, Pages 7-
8)
2. Contact the local gas company.
Adjust inlet supply pressure to
specification: NG; 5”w.c.-8”w.c.
(5”w.c.-7”w.c. at elevations over
8000 ft.) LP; 11”w.c.-12”w.c.
Fig. 27 Pilot flame is weak - does not
touch Thermocouple.
Fig. 26 Pilot flame is lifting.
Thermopile
Thermo-
couple

17
Vermont Castings Jefferson Vent Free Gas Heater
20003447
Maintenance
WARNING
Dust and debris accumulation can result in poor
performance. Inspect the valve compartment,
burner parts and log set frequently and clean
these parts monthly or as often as accumulation
warrants.
Fig. 30 Remove screen.
ST208b
Screen Hooks
The following procedures will help ensure that your
stove continues to perform safely and efficiently.
Firebox Cleaning and Inspection
Cleanliness is critical to correct operation of the heater.
The log set, burner, valve controls and air circulation
areas must all be kept free of dust and unobstructed by
debris. Inspect these areas before each use and clean
whenever accumulation is evident. Follow the simple
procedure outlined below.
Frequent cleaning may be necessary in living
environments subject to excessive carpet lint or pet
hair. For example, if you live with a dog that sheds
continuously, you will need to inspect the burner area
frequently and clean it as often as the accumulation
requires. In extreme conditions, it may be necessary to
clean the burner and log set monthly or bi-weekly.
This appliance should be inspected and thor-
oughly cleaned annually by a qualified gas techni-
cian.
Cleaning Procedure
1. Turn the burner OFF and let the heater cool com-
pletely before cleaning.
2. Remove the safety screen. (Fig. 30)
3. Carefully inspect the log set for damage. Contact
your local dealer if any damage is evident. DO NOT
OPERATE THE HEATER WITH A DAMAGED LOG
SET.
4. Use a soft-bristled brush vacuum attachment to
sweep dust or debris from the log set, pilot and
burner. Use care as the log set is fragile. Replace
log set according to instructions on pages 11 - 12.
5. Replace the screen and Front Plate. DO NOT
OPERATE THE HEATER WITH THE SAFETY
SCREEN REMOVED.
Care of Cast Iron
An occasional dusting with a dry rag will help keep the
painted surfaces looking new.
Porcelain enamel surfaces shoul be cleaned with a soft
damp cloth. Do not use abrasive cleaning agents. If
necessary, use only a cleaning agent formulated
specifically for use on porcelain enamel surfaces.
WARNING
Turn the burner Pilot OFF before applying
paint. NEVER paint pilot or around pilot area.

1818
Vermont Castings Jefferson Vent Free Gas Heater
20003447
1a
1b 1c
1d
1e
PILOT
ON
OFF
PILOT
ADJ
L
O
H
I
TPTH TH
TP
2
36
9
8
7a,b
4
15a
10
13 14
16a,b
17
11
12
18
19a,b
c,d
15b
20
HI
OFF
PILOT
LO
16c,d 21
15c 15d
5
22 23
24
25
26
Vermont Castings, Majestic Products reserves the right to make changes in design, materials, specifications, prices and discontinue colors and
products at any time, without notice.
3447
Jefferson Vent Free Gas Heater (JUVS)
Models 3095, 3096, 3097, 3100, 3101, 3102, 3105, 3106, 3107,
3110, 3111, 3112

19
Vermont Castings Jefferson Vent Free Gas Heater
20003447
Jefferson Vent Free Gas Heater (JUVS) (continued)
Models 3095, 3096, 3097, 3100, 3101, 3102, 3105, 3106, 3107, 3110, 3111, 3112
Ref. Description JUVS
1. Gas Log Set - JUVS 20003482
1a. Log Rear JUVS 20003483
1b. Log Upper Left JUVS 20003487
1c. Log Upper Right JUVS 20003486
1d. Log Left JUVS 20003485
1e. Log Right JUVS 20003484
2. Grille, JDV 30000685
3. Screen, Grille JDV 30000665
4. Screen, Front - JUV 20003438
5. Manifold Assembly 20003739
6. Lava Rocks, Burner 57897
7a. Burner Housing Assembly - JUV NG 20003130
7b. Burner Housing Assembly - JUV LP 20003334
8. Trim ON/OFF Switch - JDV 53606
9. Grate Decorative Burner 20003022
10. Wiring Harness - FSDV32RN/JDV 57265
11. Handle, Damper Maplewood - Blk 1600664
12. Front Handle Assembly - JDV/Part 5 5004240
13. Bracket - Right Log 20003019
14. Bracket - Left Log 20003020
15a. Oxygenerator, NG OP #8204 55464
15b. Oxygenerator, LP OP #8404 55465
15c. Oxygenerator, NG OP #8202 20004435
15d. Pilot ODS TP OP #8402 20001357
16a. Valve NG Honeywell - VS84212003 10000235
16b. Valve LP Honeywell - VS84212011 10000242
16c. Valve MN Eurosit 0.630.564 20001354
16d. Valve MP Eurosit 0.630.563 20001355
17. Front, JDV Refer to Enamel Parts Chart Page 19
18. Door, Control - JDV 30000686
19a. Orifice Hood #69 (.0292”) - Front - LP 30000513
19b. Orifice Hood #54 (.055” ) - Front - NG 20000130
19c. Orifice Hood #54 (.055” ) - Rear - LP 20000130
19d. Orifice Hood #44 (.086” ) - Rear - NG 30000334
20. Ignitor Piezo -Honeywell #396079 20000062
21. Cover, Valve w/Piezo 51851
22. Top Refer to Enamel Parts Chart Page 19
23. Left End Refer to Enamel Parts Chart Page 19
24. Right End Refer to Enamel Parts Chart Page 19
25. Leg Refer to Enamel Parts Chart Page 19
26. Rear Log Bracket 20003274
Shell Enamel Part Numbers
Model Number Color Top Left End Right End From
3095, 3100, 3105, 3110 Classic 30000695 30000682 30000681 30000683
3096, 3101, 3106, 3111 Midnight 30001341 30000720 30000719 30000721
3097, 3102, 3107, 3112 Green 30001342 30000726 30000727 30000727

2020
Vermont Castings Jefferson Vent Free Gas Heater
20003447
Optional Accessories
Fan Kits
FK28 Fan Assembly
The FK28 fan kit helps distribute heated air from within
the firebox out into the room. The fan is controlled by a
snapstat that turns power on and off as the firebox
temperature rises above and falls below a preset
temperature. A rheostat provides for variable fan
speeds.
Specifications
115 Volt / 60Hz / .75 Amps
Maintenance
The fan itself does not require regular maintenance,
however periodic cleaning of the fan and the surround-
ing area is required.
Installation
Refer to Assembly Section, Page 10 for installation
instructions.
Remote Controls
The remote control allows you to turn the heater on or
off from anywhere in the room. Remote controls are
available for the UVS27R only. Refer to Figure 17,
Page 12 for wiring diagram.
Model Function/s Controlled
MRC1 ON/OFF
MRC2 ON/OFF and Temperature
MRC3 ON/OFF and Temperature control
with a digital display and a pro
grammable 24 hour clock
IMT Wall mounted thermostat control