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


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111826-02J 7
INSTALLATION
Continued
Damper
Clamp
Damper
Damper
Damper
Clamp
Masonry Fireplace Manufactured
Fireplace
Figure 4 - Attaching Damper Clamp
The minimum ue sizes shown in Figure 3, page
6, are based on a 6' chimney height using round
pipe. Your minimum ue 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.

Secure damper stop clamp to edge of damper as
shown in Figure 4. I for any reason this clamp
doesn't work on your replace, another suitable
clamp or permanent stop must be installed or
damper blade must be removed.
INSTALLING HEATER ASSEMBLY
CAUTION: Do not remove the




    
   
     

-

-

  

     

-

IMPORTANT: Make sure appliance is level. If
heater is not level, heater will not work properly.
Installation Items Needed
• control cover kit (provided with heater)
• approved exible gas hose (provided) (if al-
lowed by local codes)
• sealant (resistant to propane/LP gas, not
provided)
• pipe wrench
Note: Install optional remote control accessories
(see Accessories, page 19) before installing gas
log heater.
1. Apply pipe joint sealant lightly to male threads
of gas tting (not provided). Connect approved
exible gas hose to inlet side of gas control (see
Figure 5). IMPORTANT: Hold gas tting with
wrench when connecting exible gas hose.
2.
Position heater assembly in replace.
3. Connect to gas supply. See Connecting to
Gas Supply.

   
    


 -

   

Gas Control
Flexible
Gas Hose
(if allowed
by local
codes)
Figure 5 - Attaching Flexible Gas Hose to
Heater Gas Regulator
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