Vermont Casting UC181L, UE241L, UE241N, UE181N, UC181N User Manual

Installation and Operating
Instructions for Unvented

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Gas Log Heaters

Thermstatically Controlled Double Burner
Models:
UC181N, UE181N, UC241N, UE241N (Natural Gas)
UC181L, UE181L, UC241L, UE241L (Propane)

Decorative Gas Appliance For Installation In Solid Fuel Burning Fireplaces

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.

—Do not store or use gasoline or other flam-

mable 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 appliance.

• Do not touch any electrical 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.

• If you cannot reach your gas supplier, call

the fire department.

WARNING

This appliance is for installation in a a solid fuel
burning fireplace or approved ventless enclo­sure. Do not install this appliance in bedrooms,
bathrooms, mobile homes or recreational
vehicles.

ATTENTION

This is an unvented gas fired heater. It sues air
(oxygen) from the room in which it is installed.
Provisions for adequate combustion and venti­lation air must be provided.

Certified to ANSI Z21.11.2A Standard

Installation, service, and repair of this appli­ance must be performed by a qualified
installer, service agency, company or gas
supplier experienced with this type of gas
appliance.

INSTALLER:

Read these instructions completely and care­fully prior to beginning installation. The installer
should initiate the startup procedure and oper­ate the gas log heater for a minimum of 15-30
minute test burn. After installation, leave these
instructions with the owner.

OWNER:

Read these instructions and follow the warn­ings. Save this manual for future reference.

Keep appliance clear and free from combustible
materials, gasoline and other flammable vapors
and liquids.

Any changes to this heater or its controls can be
dangerous.

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ATTENTION

WARNING

WARNING

WARNING

Before installing in a solid fuel burning fireplace, the chimney flue and firebox must be cleaned of soot,
creosote, ashes and loose paint by a qualified chimney cleaner.

CFM Home Products

2695 Meadowvale Blvd. • Mississauga, Ontario, Canada L5N 8A3

800-668-5323

3311243 7/04 Rev. 1

ATTENTION

This unvented gas log heater has been certified by CSA and tested to conform to ANSI Z21.11.2 Gas
Fired Room Heaters. Check local codes before installing this log heater. In some areas of the country,
unvented gas log heaters are restricted.

The installation and provision for combustion and ventilation air must conform with the National Fuel Gas
Code, ANSIZ223.1/NFPA 54 (latest edition), the National Electrical Code, ANSI/NFPA 70 (latest edition)
and any applicable local codes.

You must provide adequate clearances around air openings into the combustion chamber and adequate
clearance for servicing and proper operation.

WARNING

Do not use this appliance or any part that has
been under water. Immediately call a qualified
service technician to inspect the appliance and to
replace any part of the control system and any
gas control which has been under water.

WARNING

Young children should be carefully supervised
when they are in the same room with the heater.
Do not allow children to touch or operate this gas
log heater.

WARNING

Clothing or other flammable material should not be placed on or near the appliance.

WARNING

Solid fuels shall not be burned in a fireplace where an unvented room heater is installed.

WARNING

Due to high temperatures, the appliance should
be located out of traffic and away from furniture
and draperies. Children and adults should be
alerted to the hazards of high surface tempera­ture and should stay away to avoid burns or
clothing ignition.

WARNING

Improper installation, adjustment, alteration,
service or maintenance can cause injury or
property damage. For assistance or additional
information consult a qualified installer, service
agency or the gas supplier.

TECHNICAL INFORMATION

Gas Pressure Testing: This gas heater and its individual shut-off valve MUST be disconnected from the

gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2
psig (3.5kPa). The gas heater must be isolated from the gas supply piping system by closing its indi­vidual manual shut-off valve during any pressure testing of the gas supply piping system at test pres­sures equal to or less than 1/2 psig (3.5kPa).

Component Parts: Only factory authorized components listed in these instructions may be used in
accordance with the manufacturer’s instructions and all codes and requirements of the authority having
jurisdiction. Any modifications to this gas heater, or use of unauthorized components or accessory items
will void the manufacturer’s warranty, and may result in a hazardous condition.

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3311243

CARBON MONOXIDE POISONING MAY LEAD TO DEATH

When used without fresh air, vent free gas logs may give off carbon monoxide, an odorless, poisonous
gas. Some people such as pregnant women, people with heart or lung disease and persons at high
altitudes are more affected by carbon monoxide than others.
Early signs of carbon monoxide poisoning resemble the flu: Headache, dizziness and/or nausea. If you
have these signs, the heater may not be installed or working properly. Get fresh at once! Have the
heater and chimney serviced before using again.

Before You Begin -- Attention!

A. Do not allow fans to blow directly into the fireplace. Avoid any drafts that alter burner flame patterns.
B. Do not use a blower insert, heat exchanger insert or other accessory not approved for use with this

heater.

C. Any outside air ducts and/or ash dumps in the fireplace shall be permanently closed at time of appli-

ance installation.

D. 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.

E. Your fireplace must include a chain mesh or similar screen. The screen must remain fully closed while

operating your log set. Any safety screen or guard removed for servicing this appliance must be
replaced prior to operation.

F. If your fireplace includes glass doors, they must remain fully open to allow for combustion air during

operation, and to prevent overheating of the gas valve.
G.Your log set must be installed in a solid fuel burning fireplace constructed of noncombustible material.
H. If this log set is to be used with propane gas, your propane supply tank must include a high to low gas

pressure regulator, and must be located outside. DO NOT place supply tanks inside any structure.
I. Be sure to apply pipe joint compound to all non-flared, threaded connections involved in this installa-

tion to avoid possible gas leaks. Compounds used in liquid propane applications must be resistant to

the action of that gas.
J. Always test for leaks using a soapy solution. NEVER US AN OPEN FLAME!
K. The manufacture and shipping of your log set involves compounds which may cause detectable yet

harmless odors during initial operation. Provide extra ventilation to the room for the initial 2-3 hour

break in period.

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Provisions for Adequate Combustion and Ventilation Air

This heater shall not be installed in a “ CONFINED SPACE” or unusually tight construction unless provi­sions are provided for adequate combustion and ventilation air.

The NATIONAL FUEL GAS CODE, ANSI Z223.1/NFPA 54 defines a “CONFINED SPACE” as a space

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whose volume is less than 50 cubic feet per 1000 BTU per hour (4.8m

per kw) of the aggregate input

rating of all appliances installed in that space, and an “UNCONFINED SPACE” as a space whose volume

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is not less than 50 cubic feet per 1000 BTU per hour (4.8m

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.

Determining if You Have Adequate Combustion and Ventilation Air in Your Space

1. Determine the volume of space,

(length x width x height)

. Include adjoining rooms connected by

doorless passageways or ventilation grilles.

Example: A room that is 25’ x 18’ x 8’ has a volume of 3,600 cubic feet. If additional ventilation
to adjoining rooms is supplied with grilles or openings, add the volume of these rooms to the
total volume of the space.

2. Divide the volume of space by 50 cubic feet. The result is the maximum BTU/Hr the unconfined space
can support.

Example: 3,600 cubic feet divided by 50 = 72 or 72,000 BTU/Hr (maximum Btu/Hr the space can
support.)

3. Add the BTU/Hr ratings of all fuel-burning appliances installed in the same space. NOTE: Do not
include direct vent appliances as these utilize outside air for combustion and vent to the outdoors.

Example: Gas range (55,000 BTU/Hr) + Vent Free Heater (39,000 BTU/Hr) = Total 80,000 BTU/Hr.

4. Compare the maximum BTU/Hr rating the space can support with the total BTU/Hr used by the
appliances.

Example: 72,000 BTU/Hr - Max. the space can support. 94,000 BTU/Hr - Total used by the
appliances. In this example, the minimum BTU/Hr the space can support is less than the total
BTU/Hr used by the appliances. The space is considered “CONFINED SPACE”. Additional air
must be provided to meet the requirements of the vent free heater.

If you have no other fuel burning appliances located in the space, then the minimum necessary space you
would need for this 39,000 BTU/Hr maximum heater is 1950 cu. ft. An example of such a room would be
one with a length of 22’, width of 12’, and a standard 8’ ceiling - 22’ x 11.5’ x 8’ = 2,024 cubic feet.

WARNING

If the area in which the heater may be operated is smaller than that defined as an unconfined space or if
the building is of unusually tight construction, provide adequate combustion and ventilation air by one of the
methods described in the National Fuel Gas Code, ANSI Z223.1/NFPA 54.

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3311243

Installation Guidelines

The fireplace must meet the minimum dimensions listed below. (Fig. 1) Do not install the logset if the fireplace does
not meet these minimums.

Minimum Fireplace Dimensions

ABCD

Logset Gas Front Rear Min. Input Max. Input

Width Width Depth Height BTU/Hr. BTU/Hr.

18” - UC181N 29” 19” 14” 17” 25,000 39,000

18” - UE181N 29” 19” 14” 17” 25,000 39,000

24” - UC241N Natural 29” 23” 14” 17” 25,000 39,000

24” - UE241N 29” 23” 14” 17” 25,000 39,000

18” - UC181L 29” 19” 14” 17” 25,000 39,000
18” - UE181L 29” 19” 14” 17” 25,000 39,000
24” - UC241L Propane 29” 23” 14” 17” 25,000 39,000

24” - UE241L 29” 23” 14” 17” 25,000 39,000

Fireplace Spacing Requirements

The illustration in Figure 2 shows spacing requirements
for your room with a hood installed (not included).

Without a hood, you must maintain a minimum of 32”

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FD370-2

Fig. 1 Minimum fireplace dimensions.

between the top opening of the firebox and the bottom
of a mantel which protrudes out 12”. If you do not have
at least 32” between the two, a hood must be installed.

With a hood installed, you must maintain a minimum
of 24” between the top opening of the fireplace and the
bottom of the mantel.

NOTE: The distance between any combustible
material and the top opening of the fireplace must
be a minimum of 18” above the opening.

Ceiling

6" Min.

Side Wall

NOTE: In all cases, the top of the
opening for the firebox must be a
minimum of 42” from the ceiling. The
side openings must be a minimum of
6” from the closest side wall.

Fig. 2 Clearances to combustibles.

3311243

42"

Without Hood

Noncombustible
Material

Firebox
Opening

12"

18"
Min.

32"

Min.

Noncombustible
Material

Firebox
Opening

With Hood

12"

24"

Min.

8"

Min.

Hood

FP1498

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