RATURES,
THE APPLIANCE SHOULD BE
LOCATED OUT OF TRAFFIC AND
AWAY FROM FURNITURE AND
DRAPERIES.
Do not attempt to modify or alter the
construction of the appliance or its
components. Any modification or
alteration of construction may void
the warranty of these units.
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
Improper service or maintenance can
cause injury or property damage.
Refer to this manual. For assistance
or additional information, consult a
qualified installer, service agency or
the gas supplier.
Carefully review the instructions
supplied with the decorative type
unvented room heater for the mini-
mum fireplace size requirement.
Homeowner's Installation and
Operating Manual
These Ventless Fireboxes are design certified to
ANSI 21.91.2001 and are for use with any ANSI
Z21.11.2 Unvented Room Heaters.
DESIGN
CERTIFIED
20007452 3/04 Rev. 0
CFM Corporation
2695 Meadowvale Boulevard, Mississauga, Ontario L5N 8A3 Canada
(800) 668-5323 · www.cfmcorp.com
For more information on your Vermont Castings products,
please visit us online at www.cfmcorp.com 2
UV33, UV33C Ventless Fireboxes
20007452
Description
The UV33 and UV33C models are ventless fireboxes designed for installation with any ventless gas
log set certified to ANSI Z21.11.2 standards. Each model comes with a 4" black hood. Other hood
types may be used depending on the BTU rating of the log set. (See the Accessories on Page 12 for
details.)
Available Models:
UV33 Radiant Model
UV33C Circulating Model
DO NOT PLACE CLOTHING OR OTHER FLAMMABLE MATERIAL ON OR NEAR THE APPLIANCE.
CHILDREN AND ADULTS SHOULD BE ALERTED TO THE HAZARDS OF HIGH SURFACE TEM-
PERATURE AND SHOULD STAY AWAY TO AVOID BURNS OR CLOTHING IGNITION.
YOUNG CHILDREN SHOULD BE CAREFULLY SUPERVISED WHEN THEY ARE IN THE SAME
ROOM AS THE APPLIANCE.
For Your Safety
Table Of Contents
Description and Available Models ............. 2
Fireplace Dimensions ................................. 3
General Information ................................... 4
Clearances ................................................. 5
Installation .................................................. 6
Maintenance ............................................. 10
Replacement Parts ................................... 11
Accessories .............................................. 12
Warranty ................................................... 14 3
UV33, UV33C Ventless Fireboxes
20007452
33"
19
³
"
21"
32"
9 "
9
¹
"
7
¹
"
37"
32
³
"
40
¹
"
9
¹
"
6
³
"
9 "
36"
3" "
18
¹
"
18"
21"
7¹
"
Gas Line
Access
Gas Line
Access
Electrical Access
Recessed
Nailing
Flange
Rough Opening Width 38"
Rough
Opening
Height
Rough
Opening
Depth "
40
¹
"
57
¹
"
¹
"
¹
"
40
¹
"
29
¹
"
2"
7¹
"
14"
Outside Air
(Optional)
Fireplace Dimensions
Fig. 1 UV33/UV33C specifications and framing dimensions.
20"
16
³
"
30"
T241
Fig. 1a UV33/UV33C hearth dimensions. 4
UV33, UV33C Ventless Fireboxes
20007452
General Information
DO NOT BURN WOOD OR OTHER
MATERIALS IN THESE FIREBOXES.
General Information
The installation must conform with local codes or, in the
absence of local codes, with the National Fuel Gas
Code, ANSI Z223.1/NFPA 54 (latest edition) and with
the National Electrical Code, ANSI/NFPA70 (latest
edition).
NOTE: Installation and repair should be done by a
qualified service person. The firebox should be in-
spected before use and at least annually by a qualified
service person. More frequent cleaning may be re-
quired due to excessive lint from carpeting, bedding
material, etc. It is imperative that control compartment,
burners, and circulating air passageways of the firebox
be kept clean.
Any safety screen or guard removed for servicing a
firebox must be replaced prior to operating the firebox.
Provide adequate combustion and ventilation air.
The flow of combustion and ventilation air MUST NOT
be obstructed.
Provide adequate clearance around air openings into
the combustion chamber and adequate accessibility
clearance for servicing and proper operation. NEVER
obstruct the front opening of the firebox.
These models may NOT be installed in a bedroom
or bathroom.
Glass doors are NOT available for these fireboxes.
Installation Precautions
This firebox and its components have been tested and
will operate safely when installed in accordance with
this installation Manual. Read all instructions before
starting installation, then follow these instructions
carefully during installation to maximize firebox benefit
and safety. Report to your dealer any parts damaged in
shipment.
This firebox is a highly engineered system. Unless you
use CFM Corporation components which have been
designed for the system, you may create a possible fire
hazard.
CFM Specialty Home Products warranty will be
voided by, and CFM Specialty Home Products
disclaims any responsibility for, the following
actions:
Installation of any damaged firebox.
Modification of the firebox or any of the
component parts thereof.
Installation other than as instructed by CFM
Specialty Home Products.
Installation and/or use of any component part
or accessory not manufactured or approved
by CFM Specialty Home Products in combina-
tion or assembly with a Majestic Fireplaces
firebox, notwithstanding any independent
testing laboratory or other third party ap-
proval of such component part or accessory.
Any such action may create a possible fire hazard.
Consult your local building codes.
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 California to cause cancer,
birth defects and other reproductive harm.
California Health & Safety Code Sec. 25249.6
Fireplace Screen
The fireplace screen must be in place when the firebox
is operating, and unless other provisions for combustion
air are made, the screen must have openings for the
introduction for combustion air.
WARNING: Be sure to read complete Vent-Free Gas
Log Heater and Vent-Free Fireplace
Installation and Operating Instructions
before installing this product. 5
UV33, UV33C Ventless Fireboxes
20007452
Clearances
Sidewall Clearances:
The clearance from the side of the firebox to any
combustible wall should not be less than 11". (Fig. 4a)
Back Wall Clearances:
The firebox may be placed against a combustible back
wall.
Ceiling Clearances:
The ceiling height should not be less than 42" from the
top of the fireplace opening. (Fig. 4a)
Mantel Clearances:
UV Series fireboxes must use the hood supplied with
each model, or one of the hoods listed in the Accesso-
ries section (Page 13).
If a combustible mantel is installed, it must meet the
clearance requirements detailed in Figs 4a, 4b and 4c.
If using a mantel with trim leg, maintain clearance
detailed in Figure 4c.
NOTE: When installing an ANSI Z21.11.2 ventless
appliance, the finishing material used for the mantel
must be rated at 250
°
F or greater.
Grate Clearance:
The minimum clearance between the front legs of the
grate and front edge of the fireplace is 3. (Fig. 4c)
FP604c
Fig. 4 Clearances to combustibles.
3
¹
"
3
¹
"
2"
6"
8"
42"
4a
Combustible
Perpendicular Wall
11"
Min.
Front View - 2" Hood
Ceiling
Side View
Drywall
8"
Mantel
Shelf
1
¹
"
Max. 12"
8"
2" Hood
4"
Standoff
For units up to
28,000 BTU
Seal with
noncombustible
material
Front View - 4" Hood
Ceiling
42"
Combustible
Perpendicular Wall
11"
Min.
Side View
Drywall
Mantel
Shelf
8"
1
¹
"
Max. 12"
8"
4"
Standoff
4" Hood
(Includes Glass
Hood)
Seal with
noncombustible
material
Front Edge of Grate
3"
Hood
Combustible
Mantel Trim
Leg
Finished Wall
Combustible
Mantel Trim Leg
Firebox
Noncombustible
Facing Material
4c
4b
For units up to
40,000 BTU
33"
33" 6
UV33, UV33C Ventless Fireboxes
20007452
Installation
Planning
In planning the installation for the firebox it is necessary
to determine where the unit is to be installed and
whether optional accessories are desired. Gas supply
piping should also be planned.
These models may NOT be installed in a bedroom
or bathroom.
Glass doors are NOT available for these fireboxes.
The firebox can be mounted on any of the following
surfaces:
A flat hard combustible surface.
A raised platform of combustible or noncombus-
tible material.
A concrete block or other solid object placed
beneath each of the four corners of the appli-
ance.
If the firebox is installed directly on carpeting, tile or
other combustible material other than wood flooring, it
should be installed on a metal or wood panel extending
the full width and depth of the unit.
At this point, you should have decided what compo-
nents to include in your installation, and where the
firebox is to be located. If this has not been done, stop
and consult your dealer for assistance with this plan-
ning.
Framing
Firebox framing can be built before or after the firebox
is set in place. Framing should be positioned to accom-
modate wall covering and firebox facing material. The
firebox framing should be constructed of 2 x 4 or
heavier lumber. The framing headers may rest on the
top of the firebox standoffs. Refer to Figure 1 for firebox
framing dimensions.
Anchor Firebox Into Position
To prevent shifting of the firebox and to maintain sealing
(described later), anchor the firebox. Two methods are
possible on these fireboxes.
One method is to use the four fastening tabs provided
with the firebox. (Fig. 5) The firebox may be sec