Installation; Installing Vented Applications; Damper Stop Installation; Place And Secure Appliance - Monessen Hearth PH18 Installation And Operating Instructions Manual

PH Gas Logs
BEFORE FULLY INSTALLING THE UNIT:
•
Turn OFF the gas supply to the fireplace or fire-
box.
•
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 soot-
ing. Use a heat resistant sealant. Do not seal the
chimney flue damper.
Before installing in a solid fuel burning
fireplace, The chimney flue and firebox
must be cleaned of soot, creosote, ashes
and loose paint by a qualified chimney
cleaner.

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
material and minimum mantel requirements do not apply.
NOTE: The use of a thermostat is prohibited in vented log
applications.
This appliance is for installation only in a solid
fuel burning fireplace (masonry fireplace or
manufactured fireplace) with a working
flue and constructed of noncombustible
material.
Exception: DO NOT install this appliance
in a factory-built fireplace 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 lo-
cated 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.
Install and operate the appliance as directed in this
manual.
Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020
12

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 11 to prevent full closure of the fireplace
damper blade and provide a minimum 29 square inch flue
opening.
Damper
Stop
FP2538
The fireplace and gas logs function as a
system. If the fireplace is spilling into the
FP2538
room (check with a match or a smoke stick),
damper stop
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.

PLACE AND SECURE APPLIANCE

You must secure the gas log heater to
the fireplace floor. If not, the entire unit
may move when you adjust the controls.
Movement of unit may cause shifting of
the gas logs which leads to sooting and
improper burning.
Special care is required if you are installing
the unit into a sunken fireplace. You must
raise the fireplace floor to allow access to
gas log controls. This will insure adequate
air flow and guard against sooting. Raise
the fireplace floor using noncombustible
materials, as described in Placement in a
Fireplace with Restrictive Barrier on Page
7.

INSTALLATION

Damper
Figure 11 -
Damper Stop Installation
(See Warning)