www.desatech.com
114370-02C
Figure 4 - Attaching Damper Clamp
Manufactured
Fireplace
Masonry
Fireplace
Damper
Damper
Clamp
Damper
Damper
Clamp
Damper
VENTING SPECIFICATIONS FOR
INSTALLATION
The fireplace chimney flue and vent must be draft
-
ing properly. To check the vent for proper drafting:
Light a tightly rolled newspaper on one end and
place it at the inside front edge of the fireplace.
Observe the smoke and be sure the vent is properly
drawing it up the chimney. If the smoke spills out
into the room, extinguish the flame and remove any
obstruction until proper venting is achieved.
The chimney flue must have a minimum free air
opening of 43" during operation of this log set.
A damper clamp is provided to fix the damper in
position.
The minimum flue sizes shown in Figure 2 are
based on a 6' chimney height using round pipe. Your
minimum flue size will vary based on input rate and
chimney height. Refer to the
National Fuel Gas Code
ANSI Z223.1/NFPA 54, Section 6.6
, for details.
INSTALLING DAMPER CLAMP
Secure the damper stop clamp to the edge of the
damper as shown in Figure 4. If for any reason this
clamp doesn't work on your fireplace, another suit
-
able clamp or permanent stop must be installed, or
the damper blade must be cut or removed.
MODEL
BURNER
BTU
INPUT
MINIMUM
VENT
OPENING
VTD-18NV-JHB
VTD-18PV-JHB
18" Ramp 59,000
8" dia.
VTD-24NV-JHB
VTD-24PV-JHB
24" Ramp 9,000
8" dia.
VTD-30NV-JHB
VTD-30PV-JHB
30" Ramp 74,000
8" dia.
INSTALLATION
Continued
MINIMUM FIREBOX SIzES
MODEL
FRONT
WIDTH
BACK
WIDTH*
DEPTH
HEIGHT
VTD-18NV-JHB
VTD-18PV-JHB
28"
1"
14"
18"
VTD-24NV-JHB
VTD-24PV-JHB
29
3
/
4
" 20" 15
1
/
2
" 18"
VTD-30NV-JHB
VTD-30PV-JHB
3"
27"
18"
18"
*At depth indicated
BURNER ORIFICE
LOG
SIzE
NATURAL
PROPANE/LP
INCHES
NO.
INCHES
NO.
18"
0.1495
25
0.0935
42
24"
0.1570
22
0.0980
40
30"
0.10
19
0.1015
38
SPECIFICATIONS (W.C.)
FUEL INLET PRESSURE
MANIFOLD
PRESSURE
MIN.
MAX.
NG
5"
10.5"
3.5
LP
11"
14"
10
Figure 3 - Specifications
WARNING: This appliance
is equipped for (natural or pro-
pane/LP) gas. Field conversion
is not permitted.
INSTALLATION AND CLEARANCES
The charts in Figure 2 indicate technical information
regarding the installation of your gas log set. Please
make sure that all of the specifications shown are
applicable before installation is attempted.
Figure 2 - Technical Information Charts
FLUE OPENING SPECIFICATIONS
Note:
This vented appliance must be installed
only in a solid-fuel burning fireplace constructed
of noncombustible material. The fireplace must
include a flue and venting system with the mini
-
mum openings shown in Figure 3.
