PLEASE READ THIS MANUAL
BEFORE INSTALLING AND USING
APPLIANCE.
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.
Improper installation, adjustment, alteration, service or maintenance can cause
injury or property damage. Refer to this
manual for correct installation and operational procedures. Installation and service
must be performed by a qualified installer ,
service agency or the gas suppler .
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electric switch; do
not use any phone in your building.
• Immediately call your gas supplier
form your neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas supplier,
call the fire department.
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE
VAPORS AND LIQUIDS IN THE
VICINITY OF THIS OR ANY OTHER
APPLIANCE.
Homeowner’s Installation
and Operation Manual
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.
Tested and listed to ANSI Z21.11.2.2000
INSTALLER: DO NOT DISCARD THIS MANUAL -
LEAVE FOR HOMEOWNER
20003447b / 0701
1m
Vermont Castings Jefferson Vent Free Gas Heater
ATTENTION CONSUMER:
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 INSTALLATION, 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.
PLEASE READ THIS MANUAL CAREFULLY
BEFORE YOU BEGIN THE INSTALLATION PROCEDURES. FAILURE TO FOLLOW INSTRUCTIONS
MAY RESULT IN PROPERTY DAMAGE, BODILY
INJURY OR LOSS OF LIFE. THIS MANUAL CONT AINS IMPORTANT USER INFORMATION. KEEP
THIS MANUAL WITH THE HEATER AFTER INSTALLATION IS COMPLETE.
22
Vermont Castings Jefferson Vent Free Gas Heater
JUVS Specifications
Jefferson Vent Free Gas Heater Models JUVSRN, JUVSRP, JUVSMN, JUVSMP
4.4”/10.0” (MP)
Min. Inlet Supply Pressure for adjustment:5.5”w.c.11.0”w.c.
Max. Inlet Supply Pressure for adjustment: 14.0”w.c.14.0”w.c.
Min. Output, BTU/hr:
JUVSR20,00021,000
JUVSM18.50018.500
Max. Output, BTU/hr:28,00028,000
Ignition:Piezo
Firebox Weight/shipping:110 lbs.
Accessories
#2960 FK28 Fan Kit
IMT Optional Wall Thermostat
MRC1 ZC1100 Remote Control (ON/OFF w/batteries)
MRC2 ZC1200 Remote Control (ON/OFF thermostat
w/batteries)
MRC3 ZC1300 Remote Control (LCD ON/OFF
thermostat, timer w/batteries)
28¹⁄₂"
(724mm)
This appliance may be installed in an aftermarket*
manufactured (mobile) home, where not prohibited
by state or local codes.
This appliance is only for use with the type of gas
indicated on the Rating Plate. This appliance is not
convertible for use with other gases.
*Aftermarket: Completion of sale, not for purpose of resale, from the
manufacturer.
Valve
C
Inlet
L
3" (76mm)
Fig. 1 Jefferson Vent Free dimensions.
24"
(610mm)
14¹⁄₂"
(368mm)
8"
(203mm)
3447
3m
Vermont Castings Jefferson Vent Free Gas Heater
Safety Information
WARNINGS
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, EXPLOSION, ELECTRICAL SHOCK AND CARBON MONOXIDE
POISONING.
DANGER
CARBON MONOXIDE POISONING MAY LEAD TO DEATH!
Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning resemble the flu, with headaches,
dizziness or nausea. If you have these signs, the heater may not be working properly. Get fresh air at once! Have
the heater 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.
Make certain you read and understand all Warnings. Keep this manual for reference.
It is your guide to safe and proper operation of this heater.
1. Use only Natural Gas with JUVSRN, JUVSMN. Use
only Propane with JUVSRP, JUVSMP. Do not use
any other fuels.
2. Install only in accordance with the National Fuel
Gas Code, ANSIZ223.1-latest edition.
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
compartments, 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
bathroom.
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 material 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 6 and 7.
10. If heater shuts off, heater may not have enough
fresh air ventilation. Provide more fresh air. If
heater keeps shutting off, see
44
Troubleshooting
pages 16-17.
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 exposed 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.
High Altitude Derating
Input ratings are shown in BTU per hour and are for elevations up to 4,500 feet (1370m). For elevations above 4,500
feet (1370m) consult local building codes. Nuisance outages may occur at altitudes above 4,500 feet (1370m) if
dirt, dust, lint and/or cobwebs are allowed to accumulate
on burner and/or ODS pilot. Monthly inspection and cleaning is recommended for altitudes above 4,500 feet (1370m).
Vermont Castings Jefferson Vent Free Gas Heater
General Information
Vent Free Features
The JUVS Gas Heater is an unvented gas appliance
tested and listed to the ANSI standard Z21.11.2.2000.
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.
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. 3)
Cut the wire tie securing the screen.
• Remove the screen frame. (Fig. 4)
• Remove box and set aside.
Contact your dealer if the burner is loose or damaged in
any way.
Safety
Screen
Rear Log
Bracket
Pilot Hood &
Pilot
Rheostat
Bracket
ADJ
PILOT
OFF/ON/Pilot
Control Knob
Piezo Ignitor
Fig. 2 JUVS gas heater. Valve may be different.
Variable
Regulator
Supply
Line Inlet
Gas Valve
ST229b
Fig. 3 Remove stove front.
Screen Hooks
ST100
ST208b
Fig. 4 Lift screen from firebox.
5m
Vermont Castings Jefferson Vent Free Gas Heater
Installation Requirements
Fresh Air Requirements for
Combustion and Ventilation
WARNING
This heater must have fresh air for proper operation. If it does not, poor fuel combustion could
result. Read the following instructions to ensure
proper fresh air supply for this and other fuelburning appliances in your home.
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 intended installation space.
Unusually Tight Construction
You must provide additional fresh air if the space falls
into this classification.
defined as construction wherein:
a. Walls and ceilings exposed to the outside atmosphere have a continuous water vapor barrier with a
rating of one perm or less, with openings gasketed or
sealed,
b. weather stripping has been added on openable
windows and doors
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
and
Unusually Tight Construction
and
is
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
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
space whose volume is not less than 50 cubic feet per
1,000 BTU per hour (4.8m3 per 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)
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 appliances installed in the same space, including the
following:
Gas Water HeaterGas Furnace
Gas Fireplace LogsVent-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
unconfined space
confined
as a
66
Vermont Castings Jefferson Vent Free Gas Heater
4. Compare the maximum BTU/hour rating the space
can support with the total BTU/hour used by the appliances.
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 appliances. The space is considered to be
Confined Space.
Additional air must be provided to meet the requirements 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. 2)
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
Fig. 5 Supplementing ventilation air.
Option 3 -
Vents to
Adjoining
Room
Option 2 -
Remove Door to
Adjoining Room
VO370-2
7m
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