Installation
900378-00 04/2017
Innovative Hearth Products
MHD35 Series Direct-Vent Gas Fireplaces
20
4.
Rough in the Electrical Supply, if Needed
As necessary, rough in the fi replace electrical supply per NEC and local codes.
5.
Install the [Optional] Blower Kit before Installation in the Framing
1.
Remove the left side blower cover panel screw, and blower cover panel
(
Table 12, page 17
)
. Retain the panel
and screw for later reinstallation.
2.
Slide the blower through the opening and position it with the bracket oriented to the front of the fi rebox and the
blower discharge to the rear of the fi rebox. Bend the two tabs in the fi rebox fl oor to secure the blower to the
fl oor.
3.
Reinstall the blower cover panel and secure with the removed screw.
4.
Access the blower supply wiring through the front of the fi rebox and plug it into the junction box in the right, rear
of the fi rebox
(
Figure 35, Page 39
).
5.
Install the blower control switch according to its included instructions.
6.
Place the Fireplace in the Framing and Secure
NOTE:
Nailing fl anges, combustible members, and screw heads in areas directly adjacent to the nailing fl anges are
EXEMPT from the 1/2” clearance to combustible requirements for the fi rebox outer wrapper.
NOTE:
Combustible framing may be in direct contact with the nailing fl anges and may be located within 1/2” of screw
heads and the fi rebox wrapper in areas adjacent to the nailing fl anges.
Frame the opening to the exact dimensions specifi ed in the framing details in this manual.
1.
Bend out the appropriate nailing fl anges for the drywall / fi nish material to be used
(
Figure 10
)
. Nailing fl anges
are provided for:
•
fl ush framing,
• 1/2”,
and
•
5/8” framing depths.
2.
Secure the fi replace to the side framing members using the unit’s nailing fl anges —one top and bottom on each
side of the fi replace front
(
Figure 10
)
. Use 8d nails or the equivalent.
Figure 10 - Nailing Flanges
Side
framing
Unit nailing fl ange
(no clearance to combustible
framing is required)
VENT SYSTEM PREPARATION
7.
Select a Horizontal or Vertical Vent System
1.
With the fi replace secured in the framing, determine the vent route and identify the exterior termination location.
The following sections describe vertical (roof) and horizontal (exterior wall) vent applications. Use only approved
vent components
(
Page 8 and Pages 45 and 46
)
.
NOTE:
This fi replace must be vented directly to the outside.
WARNING
The vent system may not service multiple appliances, and must never be connected to a
fl ue serving a separate solid fuel burning appliance.
NOTE:
The vent pipe is tested to be run inside an enclosed wall (such as a chase). There is no requirement for
inspection openings in the enclosing wall at any of the joints in the vent pipe.
