Optional Blower Kit Wiring; Connecting Gas Line - Lennox Merit MLDVTCD-35NM Installation Instructions Manual

LENNOX HEARTH PRODUCTS • MERIT
7. If an optional control is to be used, wire
it in the low voltage circuit as shown in
Figure 27.
NOTE: The supplied 15 ft of
2-conductor wire has one end of
each conductor connected to the gas
valve circuit and the other end of each
conductor placed loose inside the
bottom compartment.
8. After the wiring is complete, replace the
cover plate.
WARNING
Electronic models of these
appliances are equipped with
a three-prong (grounding) plug
utilized in connecting the electronic
components to the junction box
in the lower compartment. This
grounding plug provides protection
against shock hazard and should
be plugged directly into a properly
grounded three-prong receptacle.
DO NOT cut or remove the grounding
prong from the plug.
24
SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS
®
Wire the [Optional] Blower Kit After
Installation in the Framing
FBK-100 and FBK-200 Kits
An electrical outlet box is provided for the
installation of the FBK-100 and FBK-200
forced air blower kits. Electrical power
must be provided to the box to operate the
blower. Install the blower kit according to
the installation instructions provided with
the kit.
NOTE: The tab connecting the receptacles of
the outlet box must be broken (Figure 28).
NOTE: For fireplace models including a
factory-installed blower (models with FB
designation), an FBK2/FBK3 kit should be
installed for proper control. Refer to the
included instructions for more information.
Figure 28: Junction Box Wiring
BLOWER CONTROL CIRCUIT WIRING
120V, 60HZ, 1PH
* Wall-mounted
ON/ OFF Blower
Switch or Variable
Speed Control Switch.
Junction Box
Tab
Broken
Red
Black
Plug blower
Tab Intact
into this
receptacle
Blower Field Wired
Factory Wired
Ground
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Connect the Gas Line
All codes require a shut-off valve mounted
in the supply line. Figure 29 illustrates two
methods for connecting the gas supply.
The flex-line method is acceptable in the
U.S., however, Canadian requirements vary
depending on locality. Installation must be
in compliance with local codes.
These appliances are equipped with a
gas flex line for use (where permitted) in
connecting the unit to the gas line. A gas
flex line is provided to aid in attaching the
direct vent appliance to the gas supply. The
gas flex line can only be used where local
codes permit. The flex line is rated for both
natural and propane gas. A manual shut off
valve is also provided with the flex line.
The gas control valve is located in the lower
control compartment (Figure 30).
Remove Control Compartment Door
Open the panel by grasping the control
compartment door on both sides and gently
pulling the top away from the fireplace to
disengage the magnetic fasteners. The door
is hinged at the bottom. If greater access
to the control compartment is required,
slide the door, first to one side and then
the other, so the tabs clear both of the
locating holes.
Millivolt and electronic control valves have a
3/8 in. (10 mm) NPT thread inlet port.
Hot
Secure all joints tightly using appropriate
Side of
Receptacle
tools and sealing compounds (ensure
propane resistant compounds are used
in propane applications). Optionally, seal
Neutral
around the gas line to prevent cold air
Side of
Receptacle
leakage. Gas line holes and other openings
can be caulked or stuffed with unfaced
fiberglass insulation.
Green
Ground
Screw
All codes require a shut-off valve mounted
in the supply line. The orientation of
the shut-off valve should face the front.
Figure 29 illustrates two methods for
connecting the gas supply. A sediment
trap is recommended to prevent moisture
and debris in the gas line from damaging
the valve.
Never use an open flame to check
for leaks.
WARNING