Monessen • Mojo Installation/Owner’s Manual • 4623-900 Rev. D • 04/21
14
Figure 3.10 - Securing Heater to Floor of Fireplace/Firebox
Assembly Procedure
1. Center the burner assembly inside the fireplace or
firebox. Make certain that the front of the burner
assembly sits inside the front edge of the fireplace or
the firebox.
2. Anchor holes are located on the right and left front
edge of the engine assembly just behind the grate.
After centering the burner assembly correctly, mark the
holes on the fireplace or firebox floor. Drill two (2) 5/32"
diameter holes approximately 1-1/4" deep. Anchor the
engine assembly using the two (2) supplied 1/4" hex
head fasteners through the holes previously drilled.
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. Grate movement could cause a
gas leak.
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
ensure 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.
WARNING
Top view line of sight to both
mounting locations