Specifications

11

NBST27 Unvented Gas Log Set


• Turn the gas supply to the fireplace or firebox.
• Seal any fresh air vents and/or ash clean-out doors
located on the floor or wall of the fireplace. If left
unsealed, drafting may cause pilot outage or sooting.
Use a heat resistant sealant. 


Milli-volt controlled gas logs may be installed as a vented
decorative log set in compliance with ANSI Z21.60 and
National Fuel Gas Code, Section 6.6. 

      


• Turn off gas supply to fireplace or firebox.
• Have the fireplace floor and chimney professionally
cleaned to remove ashes, soot, creosote or other
obstructions. Have this cleaning performed annually
after installation.
• Seal any fresh air vents or ash clean-out doors located
on floor or wall of fireplace. If not, drafting may cause
pilot outage or sooting. Use a heat-resistant sealant.
Do not seal chimney flue damper.
     



       





Exception: 
          



FP2370
damper
Damper Stop
Damper
FP2370
Figure 11 -
Damper Stop Installation
(Refer to WARNING at top of page)

A damper stop must be provided with the unit when used
for vented applications. Contact your dealer to obtain one.
The damper stop must be installed as shown in 
to prevent full closure of the fireplace damper blade and
provide a minimum 29 square inch flue opening.
 for installations in the Commonwealth
of Massachusetts.