Design Dynamics VTD-18N-JHB Gas Heater User Manual


 
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114370-01E6
Figure 3 - Attaching Damper Clamp
Manufactured
Fireplace
Masonry
Fireplace
Damper
Damper
Clamp
Damper
Damper
Clamp
Damper
VENTING SPECIFICATIONS FOR
INSTALLATION
The replace chimney ue and vent must be
drafting 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 replace. 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 ame and remove any obstruc-
tion until proper venting is achieved.
The chimney ue must remain open a mini-
mum of 3" at all times during the operation of
this log set.
MODEL
BURNER
DESCRIPTION
BTU
INPUT
MINIMUM VENT
OPENING
VTD-18N-JHB 18" Ramp 59,000 8" dia.
VTD-24N-JHB 24" Ramp 69,000 8" dia.
VTD-30N-JHB 30" Ramp 74,000 8" dia.
INSTALLATION
Continued
MINIMUM FIREBOX SIZES
MODEL FRONT WIDTH BACK WIDTH* DEPTH HEIGHT
VTD-18N-JHB 28" 16" 14" 18"
VTD-24N-JHB 29
3
/
4
" 17" 15
1
/
2
" 18"
VTD-30N-JHB 36" 27" 18" 18"
*At depth indicated
BURNER ORIFICE
LOG SIZE
NATURAL
INCHES NUMBER
18" 0.1495 25
24" 0.1570 22
30" 0.1660 19
FUEL INLET PRESSURE

MIN. MAX.
NG 5.5" 10.5"
Figure 2 - Technical Information Charts
INSTALLING DAMPER CLAMP
Secure the damper stop clamp to the edge of
the damper as shown in Figure 3. If for any
reason this clamp doesn't work on your re-
place, another suitable clamp or permanent
stop must be installed, or the damper blade
must be cut or removed.