heat--glo-lifestyle mtl-insert User Manual

Page of 40
Heat & Glo  •  MTL-Insert  •  2145-900 Rev. F  •  9/08
6
TOP VIEW
A
C
B
Fireplace Size Requirements 
 
Figure 3.1  Fireplace Opening
NOTE:  For actual appliance dimensions refer to Section 15.
Minimum Appliance Size   
Location
MTL-INSERT
Inches
Millimeters
A
  Front Width  
29-1/4
743
B
  Rear Width  
20-1/4
515
C
  Depth 
13-5/8
346
*
  Height
20-1/4
515
* NOTE: If exhaust collar on insert and fi replace damper do not line up, add 4 
inches (102 mm) to minimum fi replace height for bends in vent pipe.
A.  Minimum Fireplace Opening
Minimum  fi replace opening requirements are shown in 
Figure 5.1. 
WARNING! Risk of Fire or Burns! Provide adequate 
clearance around air openings and for service access. 
Due to high temperatures, the appliance should be locat-
ed out of traffi c and away from furniture and draperies.
• The fi rebrick (refractory), glass doors, screen rails, screen 
mesh and log grates can be removed from a factory 
built fi rebox in order to gain minimum gas insert opening 
requirements.
•  Any smoke shelves, shields and baffl es may be removed 
from the factory built fi rebox if attached with mechanical 
fasteners. 
• The metal fl oor of the solid fuel fi rebox may be removed to 
facilitate the installation of the insert.  The appliance may 
not be placed directly on the base of the outer wrap, a 1/4 
inch airspace must be provided between the insert and 
the fl oor of the outer wrap.  Use the levelling legs to raise 
the insert a minimum of 1/4 inch.  The original fi replace 
may never be returned to solid fuel in this condition.  
The sidewalls and top structure of the fi rebox may not 
be altered with the exception of removable baffl es and 
dampers.
•  Cutting of any sheet metal parts of the fi replace in which 
the gas fi replace insert is to be installed is prohibited, 
except the fl oor as tested for and as noted above.