Field Wiring - Lennox Merit MLDVTCD-35NM Installation Instructions Manual

LENNOX HEARTH PRODUCTS • MERIT

Field Wiring

CAUTION
The ground supply lead must be
connected to the wire attached to
the green ground screw located
on the outlet box (see wiring
diagrams). Failure to do so will
result in a potential safety hazard.
The appliance must be electrically
grounded in accordance with local
codes or, in the absence of local
codes, the National Electrical Code,
ANSI/NFPA 70—latest edition (in
Canada, the current CSA C22-1
Canadian Electrical Code).
CAUTION
Label all wires prior to disconnection
when servicing controls. Wiring
errors can cause improper and
dangerous operation.
ATTENTION
Au moment de l'entretien des
commandes, étiquetez tous les
fils avant de les débrancher. Des
erreurs de cáblage peuvent entraîner
un fonctionnement inadéquat et
dangereux.
Verify proper operation after servicing.
S'assurer que l'appareil fonctionne
adéquatement une fois l'entretien
terminé.
The gas valve is set in place and pre-
wired at the factory for both millivolt and
electronic models.
Millivolt Wiring
Millivolt units are not provided with factory-
installed controls; therefore, one of the
optional control switches is required to
operate the unit (Figure 26):
• ON/OFF Wall Switch,
• Unit-Mountable ON/OFF Switch *,
• Thermostat, or
• Remote Control.
See the fireplace Care and Operation
Instructions for details.
* If using a unit-mountable ON/OFF rocker switch with
an optional Style View Door, mount the rocker switch
on the door instead of the unit.
1. If installing an ON/OFF wall switch or
thermostat, mount it in a convenient
location on a wall near the fireplace.
2. Wire the control switch within the
millivolt control circuit using the 15 ft of
2-conductor wire supplied with the unit.
SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS
®
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.
Figure 26: Wiring Diagram—
Millivolt Gas Valves
THERMOPILE
APPLIANCE- MOUNTED
ON/OFF SWITCH
(OPTIONAL)
TP-TH
TP
TH
GAS VALVE
BK/W(1) BK/W(1)
WALL-MOUNTED ON/OFF SWITCH (OPTIONAL)
THERMOSTAT (OPTIONAL)
WALL MOUNTED CONFIGURATION FOR FAN SWITCH (OPTIONAL)
FAN
(OPTIONAL)
JUNCTION BOX
CAUTION
In millivolt systems, do NOT
connect a wall switch to a 120 V
power supply.
Figure 27: Wiring Diagram—Electronic Gas Valves
JUNCTION BOX
120V AC
HOT
B
NEUTRAL
W
GROUND
G
LIMIT SWITCH
B-VENT MODELS
ONLY
OPTIONAL
REMOTE RECEIVER
ON/OFF SWITCH
WALL SWITCH
WIRING COLOR CODE
B = BLACK BL = BLUE
BR = BROWN G = GREEN
GY = GRAY O = ORANGE
PU = PURPLE W = WHITE
R = RED Y = YELLOW
P/N 580491-01
SCHEMATIC REPRESENTATION ONLY
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Electronic Wiring
One of the following optional controls may
be used:
• ON/OFF Wall Switch,
• Remote Control.
See the fireplace Care and Operation
Instructions for details.
NOTE: Electronic models must be
connected to the main power supply.
1. Route a 3-wire, 120 Vac, 60 Hz,
1 ph power supply to the appliance
junction box.
2. Remove the electrical inlet cover plate
from the side of the unit by removing
the plate's securing screws (Table 11
on Page 11).
3. Remove the cover plate knockout. Then,
feed the power supply wire through
the knockout opening and into the unit
junction box.
4. Connect the black power supply wire
to the lower outlet's red pigtail lead
(Figure 27 and Figure 28). Connect the
white power supply wire to the outlet's
common terminal.
BK
5. Connect the ground supply wire to
R
W
the pigtail lead attached to the outlet's
green ground screw.
GR
NOTE: Remote receiver should be
located in the wall, or if installed in the
control compartment, pulled all the way
forward and completely to the left or
right against the corner posts.
6. If a wall-mounted ON/OFF control is
to be used, mount it in a convenient
location on a wall near the fireplace.
AC/DC
POWER
ADAPTOR
Y
G
PROFLAME VALVE
O
B
R
B
W
R
BL
BATTERY HOLDER
ELECTRONIC PILOT ASSEMBLY
IGNITER ROD
HOOD
FLAME SENSOR
B
PILOT
PILOT TUBE B
SENSOR
Y
CABLE
SPARK WIRE CABLE
PILOT GROUND WIRE
Y
G
O
W
PROFLAME DFC BOARD
BL
B
R
G
B
R
DFC WIRE HARNESS
OPTIONAL CPI SWITCH
OFF (O) = INTERMITTENT PILOT MODE
ON (-) = STANDING PILOT MODE
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