Pre-Installation Steps; Typical Installation Sequence; Step 1. Framing - Lennox MPB35ST-NM-B Installation Instructions Manual

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WARNING
Failure to position the parts in
accordance with these diagrams
or failure to use only parts specifi-
cally approved with this appliance
may result in property damage or
personal injury.
AVERTISSEMENT
Risque de dommages ou de
blessures si les pièces ne sont
pas installées conformément à
ces schémas et ou si des pièces
autres que celles spécifiquement
approuvées avec cet appareil sont
utilisées.

PRE-INSTALLATION STEPS

The appliance is shipped with all gas controls
and components installed and pre-wired.
1. Remove the shipping carton. Remove the
shipping pad, exposing the front glass
door.
2. Open the two latches (located under the fire-
box floor) securing the glass door. Remove
the door by tilting it outward at the bottom
and lifting it up. Set the door aside protecting
it from inadvertent damage. See Removing
Glass Panels on Page 18.
Top Louver Panel
Control Compartment Access Panel
Figure 7
- Unit Parts Identification
* NOTE: INSTALLATION DIAGRAMS AND
INSTRUCTIONS SHOW THE FRONT OF
THE APPLIANCE AS THE SIDE WHICH HAS
VALVE ACCESS, EXCEPT WHERE NOTED.
8

TYPICAL INSTALLATION SEQUENCE

The typical sequence of installation is outlined
below. However, each installation is unique
and may result in variations to the steps
described.
See the page number references in the following
steps for detailed procedures.
Step 1. (Page 8) - Construct the appliance
framing. Position the appliance within
the framing and secure with nailing
flanges.
Step 2. (Page 10) Route gas supply line to
appliance location.
Step 3. (Page 11) Install the vent system and
exterior termination.
Step 4. (Page 12) Field Wiring
a. Millivolt Appliances – Install the
OFF/ON burner control switch.
b. Electronic Appliances – Connect 120
VAC electrical power to the appliance
receptacle.
Step 5. (Page 13) Make connection to gas
supply.
Step 6. (Page 14) Outside Air Kit Installation.
Step 7. (Page 15) Verify appliance operation.
Step 8. (Page 15) Install grate, vermiculite,
embers and logs.
Step 9. (Page 18) Installation/Removal of glass
enclosure panels.
Step 10 (Page 19) Adjust burner primary air
shutter to achieve proper flame appear-
ance.
Step 11. (Page 20) Vent operation test and (safety
limit) switch operation.
Step 12. (Page 20) Install the decorative trims
and hoods.
Step 13. (Page 21) Attach Safety in Operation
Warnings.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Step 1. FRAMING

Frame these appliances as illustrated in Figure
9. All framing details must allow for a minimum
clearance to combustible framing members as
shown in Table 6 on Page 7.
If the appliance is to be elevated above floor
level, a solid continuous platform must be
constructed below the appliance.
Headers may be in direct contact with the
appliance top spacers but must not be sup-
ported by them or notched to fit around them.
All construction above the appliance must be
self-supporting, DO NOT use the appliance for
structural support.
Side Nailing Flanges
The fireplace should be secured to the side
framing members using the unit's nailing
flanges - one top and bottom on each side
of the fireplace front. See Figure 8 using the
existing screws. Position the fireplace within
the framing. When required, the tabs may be
bent 90 degrees by hand or with the assistance
of a hammer. Use wood screws to secure the
nailing flanges to the framing. See Table 6 on
Page 7 for clearances of framing members
to cabinet parts. The nailing flange itself can
directly contact framing.
Floor Nailing Tabs
Secure the fireplace to the floor as shown in
Figure 8.
Remove the screws
and use them when
installing the nailing
flanges
Nailing
Flanges
Turn nailing tabs down and secure to the floor
with 8d nails or other appropriate fasteners on
both sides of appliance.
Figure 8

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