Fireplace Preparation; Before Fully Installing The Unit; Installing In Vented Applications; Before Installing The Appliance - Vermont Castings NBST27 Installation And Operating Instructions Manual

NBST27 Unvented Gas Log Set
WARNING
Before installing in a solid fuel burning fi replace,
The chimney fl ue and fi rebox must be cleaned of
soot, creosote, ashes and loose paint by a qualifi ed
chimney cleaner.
WARNING
This appliance is for installation only in a solid
fuel burning fireplace (masonry fireplace or
manufactured fi replace) with a working fl ue and
constructed of noncombustible material.
Exception: DO NOT install this appliance in a factory-
built fi replace that includes instructions stating that
it has not been tested or should not be used with
unvented gas logs. This log set may be installed as
a vented log set.

BEFORE FULLY INSTALLING THE UNIT:

•
Turn OFF the gas supply to the fi replace or fi rebox.
•
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. Do not seal the chimney
fl ue damper.

INSTALLING IN VENTED APPLICATIONS

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. Since, the gas logs
are operated with the damper open, noncombustible
material and minimum mantel requirements do not
apply.
10

FIREPLACE PREPARATION

BEFORE INSTALLING THE APPLIANCE:

•
Turn off gas supply to fi replace or fi rebox.
•
Have the fi replace fl oor 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 fl oor or wall of fi replace. If not, drafting may cause
pilot outage or sooting. Use a heat-resistant sealant.
Do not seal chimney fl ue damper.
Install and operate the appliance as directed in this
manual.

DAMPER STOP INSTALLATION:

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 Figure 10
to prevent full closure of the fi replace damper blade and
provide a minimum 29 square inch fl ue opening.
Refer to Page 27 for installations in the Commonwealth
of Massachusetts.
FP2370
Figure 10 -
Damper Stop Installation
(Refer to WARNING at top of page)
Damper Stop
Damper
81D3032