Design Dynamics VTD-24N-JHB - Manual (Page 6)

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Figure 3 - 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
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 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 obstruc-
tion.until.proper.venting.is.achieved.
The chimney flue 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 9. 3 /
4
" 17" 15. 1 / " 18"
VTD-30N-JHB 36" 27" 18" 18"
*At.depth.indicated
BURNER ORIFICE
LOG SIZE
NATURAL
INCHES NUMBER
18" 0.1495 5
24" 0.1570
30" 0.1660 19
FUEL INLET PRESSURE
SPECIFICATIONS (W.C.)
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 fire-
place, another suitable clamp or permanent
stop must be installed, or the damper blade
must.be.cut.or.removed.