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UVS33/36 Vent-Free Heaters
20002211
Hearth Extension
A hearth extension in front of heater is recommended
but not required.
Planning
Planning the installation is an important first step: it will
save time and money later in the actual installation. In
planning the installation, consider:
1. Where the heater will be located.
2. All components needed to complete the
project.
J
F
G
H
I
CFM164a
Mantel Leg Chart
06/22/01 sta
CFM170
DV Builder Front
View
O
N
M
L
K
Side of
Combustion Chamber
Mantel
Leg
CFM170
CFM164a
Mantel Mantel Leg From Side
Ref. Leg Depth Ref. of Combustion Opening
F 10" (254 mm) K 12" (305 mm)
G 8" (203 mm) L 10" (254 mm)
H 6" (152 mm) M 8" (203 mm)
I 4" (101 mm) N 6" (152 mm)
J 2" (51 mm) O 4" (101 mm)
Fig. 5b Combustible mantel leg minimum installation.
Black
Surround
Face
Mantel
Leg
Fig. 5a Combustible mantel minimum installation.
CFM146
Ref. Mantel Ref. Mantel From Top
Shelf Depth of Comb. Chamber
V 10" (254 mm) A 19
¹⁄₂" (495 mm)
W 8" (203 mm) B 17
¹⁄₂" (444 mm)
X 6" (152 mm) C 15
¹⁄₂" (394 mm)
Y 4" (101 mm) D 13
¹⁄₂" (343 mm)
Z 2" ( 51 mm) E 11
¹⁄₂" (292 mm)
A B C D E
V
W
X
Y
Z
Fireplace
CFM146
DV Mantel Chart
7/5/01 sta
Top Louvre
Assembly
Top of Combustion
Chamber
Bottom of Door Trim
Mantels
Depending on the width of the mantel, it may be in-
stalled higher or lower from the combustion chamber
opening. This also applies to the distance between the
mantel leg (if installed) and the fireplace. Refer to Fig-
ures 5a and 5b for correct mounting heights and widths
for combustible mantels and mantel legs.
Noncombustible mantels and legs may be installed at
any height above the appliance opening.
When using paint or lacquer to finish the
mantel, such paint or lacquer must be heat
resistant to prevent discoloration.
Mounting the Heater
The heater should only be mounted on the following
surfaces:
• A flat combustible (burnable) surface.
• A raised wooden platform.
• A concrete block or other solid object placed be-
neath each of the four corners of the heater.
To mount the heater:
1. Choose unit location.
2. Place unit in position and secure to floor with 1¹⁄₂"
screws or nails. The holes to secure the unit to the
floor are located just behind the bottom louvre on the
left and right hand side of the unit.