Fireplace Preparation - Monessen Hearth NB18 Installation And Operating Instructions Manual

BEFORE FULLY INSTALLING THE UNIT:
• Turn OFF 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. Do not seal the chimney flue damper.
INSTALLING VENTED APPLICATIONS
Manual and Millivolt 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, non-combustible mate-
rial and minimum mantel requirements do not apply.
This appliance is for installation only in a solid fuel burning fi replace (masonry fi replace
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 INSTALLING THE APPLIANCE:
• 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.
Install and operate the appliance as directed in this
manual.
DAMPER STOP INSTALLATION:
A damper stop must be provided with the unit. Contact
your dealer to obtain one. The damper stop must be
installed as shown in Figure 13 to prevent full closure
of the fireplace damper blade and provide a minimum
29 square inch flue opening.
The fi replace and gas logs function as a system. If the fi replace is spilling into the room
(check with a match or a smoke stick), reposition the damper clamp until a positive
draft is obtained by opening the damper. If negative pressure in home prevents having
a positive draft, contact your dealer for assistance.
81D0107
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.

FIREPLACE PREPARATION

Damper Stop
Damper
Figure 13 - Damper Stop Installation.
17