Typical Installation Sequence; Detailed Installation Steps; Step 1. Framing; Step 2. Routing Gas Line - Lennox MP03-VDLPM Installation Instructions Manual

Merit plus series direct vent, vented gas fireplace heaters - direct vent models
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TYPICAL INSTALLATION SEQUENCE

The typical sequence of installation follows,
however, each installation is unique resulting in
variations to those described.
See the page numbers references in the follow-
ing steps for detailed procedures.
Step 1. (page 6) Construct the appliance fram-
ing. Position the appliance within the framing
and secure with nailing brackets.
Step 2. (page 6) Route gas supply line to
appliance location.
Step 3. (page 10) Install the vent system
and exterior termination. Install additional
restrictor, if needed.
Step 4. (page 21) Field Wiring
a. Millivolt Appliances – The operating control
switch is factory installed.
b. Electronic Appliances – Connect 120 Vac
electrical power to the appliance receptacle.
Step 5. (page 22) Make connection to gas
supply.
Step 6. (page 23) Install the logs and glow-
ing embers.
Step 7. (page 23) Checkout appliance operation.
Step 8. (page 23) Install glass door frame
assembly.
Step 9. (page 24) Adjust burner to ensure
proper flame appearance.

DETAILED INSTALLATION STEPS

The appliance is shipped with all gas controls
and components installed and pre-wired. Re-
move the shipping carton, exposing the front
glass door. Remove the bottom panel by lifting
and pulling it towards the front.
Open the two latches (located under the firebox
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 Figure 39 on page 23.
6
Horizontal Vent Termination Clearances
Combustible Projection
2-1/2 inches or less in length
Combustible Projection greater
than 2-1/2 inches in length
Ventilated
Soffit
Unventilated
Soffit
18"
12"
(457 mm)
(305 mm)
Termination Kit
Figure 5 - Side Elevation View

Step 1. FRAMING

Frame these appliances as illustrated in Figure 9
on page 8, unless the appliance is to be installed
in a corner .
See Figure 10 on page 8 for corner framing
installations. All framing details must allow for a
minimum clearance to combustible framing mem-
bers as shown in Table 2 on page 4 .
If the appliance is to be elevated above floor level,
a solid continuous platform must be constructed.
Headers may be in direct contact with the appli-
ance top spacers but must not be supported by
them or notched to fit around them. All construc-
tion above the appliance must be self supporting,
DO NOT use the appliance for structural support.
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 6. Use 8d nails or their equivalent.

Step 2. ROUTING GAS LINE

Route a 1/2" (13 mm) gas line along the inside
of the left side framing as shown in Figure 7 .
Gas lines must be routed, constructed and
made of materials that are in strict accordance
with local codes and regulations.
All appliances are factory-equipped with a flex-
ible gas line connector and 1/2 inch shutoff
valve. (See step 6 on page 22).
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
All horizontal terminations
may be located as close as
6" (152mm) to any
(non-combustible and
combustible) exterior
sidewall. This distance
may be decreased to 2"
(51mm) for non- n -
3"
combustible exterior
(76 mm)
sidewalls only, if the
SV4.5HT-2 termination
is used.
Unit Being Secured By Its Nailing Flanges
Unit Being Secured by Its Nailing
Flanges to the Framing
Figure 6
Figure 7
Termination Kit
To The Framing

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