14
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT
®
SERIES B-VENT GAS FIREPLACES • 36" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
WIRING DIAGRAMS
Wiring diagrams are provided here for reference
purposes only. This information is also provided
on schematics found on pullout labels located
within the control compartment attached to
the gas control valve. Electronic and Millivolt
wiring diagrams are provided here.
CAUTION: Label all wires prior to discon-
nection when servicing controls. Wiring
errors can cause improper and dangerous
operation. verify proper operation after
servicing.
ATTENTION: Au moment de l'entretien
des commandes, étiquetez tous les fils
avant de les débrancher. Des erreurs
de cáblage peuvent entraîner un fonc-
tionnement inadéquat et dangereux.
Figure 18
Figure 19
MILLIVOLT WIRING DIAGRAM
NOTE: If any supplied wire must be replaced,
always use Type AWM, 105°C, 18 GA wire.
BK
BK
BK
TP
TH
BK
WHT
LIMIT
SWITCH
THERMOPILE
*
FACTORY WIRED
FIELD WIRED
*
For optional wall switch attachment only.
DAMPER
SWITCH
TP
TH
* Control Switches: Wall On/Off Switch or Timer, Unit Mounted On/Off Switch, or Remote Control Switch.
If an optional
control switch is installed, turn the appliance-mounted ON/OFF burner control switch to the OFF position
.
NOTES:
1. If any of the original wire as supplied must be replaced, use Type AWM 105°C - 18 gage wire ONLY.
2. 120 VAC, 60 Hz - Less than 3 Amps.
CAUTION: label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after servicing.
0.375"
0.375"
0.25"
Ø
NOT FOR USE WITH SOLID FUEL
CAUTION:
Hot while in operation. Do not
touch. Severe Burns may result. Keep children, clothing,
furniture, gasoline and other liquids having flammable
vapors away.
CAUTION:
Do not operate the appliance with
factory installed refractory panel(s) removed, cracked or
broken. Replacement of the factory installed refractory
panel(s) should be completed by a licensed or qualified
service person.
WARNING:
Improper installation, adjustment,
alteration, service or maintenance can cause injury
or property damage. Refer to the owner’s information
manual provided with this appliance. For assistance
or additional information consult a qualified installer,
service agency or the gas supplier.
Due to high temperatures, keep children, and furniture
away.
Keep burner and control compartment clean. See
installation and operating instructions accompanying
appliance.
WARNING:
Do not connect 120 V AC to the control valve.
THIS APPLIANCE MUST BE INSTALLED IN ACCORDANCE
WITH LOCAL CODES, IF ANY; IF NONE, FOLLOW THE
NATIONAL FUEL GAS CODE, ANSI Z223.1, OR NATURAL
GAS AND PROPANE INSTALLATION CODE, CSA B149.1.
If not installed, and maintained in accordance with the
manufacturer's instructions, this product could expose
you to substances in fuel or fuel combustion which are
known to the state of California to cause cancer, birth
defects, or other reproductive harm.
* For a copy of the homeowner’s care and operation
manual, go to www.lennox.com or call 1-800-9-lennox.
B-VENTED APPLIANCES NEED FRESH AIR FOR SAFE
OPERATION AND MUST BE INSTALLED SO THERE
ARE PROVISIONS FOR ADEQUATE COMBUSTION AND
VENTILATION AIR.
DIRECT VENTED APPLIANCES MUST NOT BE OPERATED
WITHOUT THE FRONT GLASS PANEL(S) INSTALLED.
DO NOT OPERATE APPLIANCE WITH BROKEN,
CRACKED OR MISSING GLASS DOORS OR ENCLOSURE
PANEL(S).
ELECTRONIC IGNITION WIRING DIAGRAM
P/N 62L2701_4
Optional Blower**
OFF/ON Switch
(Integral with
Gas Valve)
Honeywell
Electronic
Gas
Valve
120 VAC
Primary
Secondary
Junction Box
Break Off Tab
Junction Box
Pilot Burner
Assembly
BL
BL
Field Wired
Factory
Wired
BK = BLACK BL = BLUE
R = RED W = WHITE
G = GREEN
BK
BK
BK
BK
BL
R
GROUND
24 V
Transformer
J-Box Wiring
WITH Optional Blower Switch
J-Box Wiring
WITHOUT Optional Blower Switch
BK
W
G
CA
V
02
1
BK
W
G
CA
V
02
1
Igniter
Connector
*
**
Control Switches: Wall On/Off
Switch, Unit Mounted On/Off Switch,
Wall Thermostat (Direct-Vent Units
Only) or Remote Control Switch.
Some models are not approved for
use with an optional blower. See Care
and Operation manual for approved
accessories.
Schematic Representation Only
W
GR
BK
BK
R
Control
Switch *
DAMPER
SWITCH
HIGH LIMIT
SWITCH
B-Vent appliances only - one or both of these switches must
be factory installed in series as shown. If wires to these switches
are replaced, wires must be Type AWM 200°C - 18 gage wire ONLY.
NOTES:
1. If any of the original wire as supplied
must be replaced, use Type AWM
105°C - 18 gage wire ONLY.
2. 120 VAC, 60 Hz - Less than 3 Amps.
CAUTION: label all wires prior to
disconnection when servicing controls.
Wiring errors can cause improper and
dangerous operation. Verify proper
operation after servicing.
ELECTRONIC IGNITION WIRING DIAGRAM
0.375"
0.375"
0.25"
Ø
NOT FOR USE WITH SOLID FUEL
CAUTION:
Hot while in operation. Do not
touch. Severe Burns may result. Keep children, clothing,
furniture, gasoline and other liquids having flammable
vapors away.
CAUTION:
Do not operate the appliance with
factory installed refractory panel(s) removed, cracked or
broken. Replacement of the factory installed refractory
panel(s) should be completed by a licensed or qualified
service person.
WARNING:
Improper installation, adjustment,
alteration, service or maintenance can cause injury
or property damage. Refer to the owner’s information
manual provided with this appliance. For assistance
or additional information consult a qualified installer,
service agency or the gas supplier.
Due to high temperatures, keep children, and furniture
away.
Keep burner and control compartment clean. See
installation and operating instructions accompanying
appliance.
WARNING:
Do not connect 120 V AC to the control valve.
THIS APPLIANCE MUST BE INSTALLED IN ACCORDANCE
WITH LOCAL CODES, IF ANY; IF NONE, FOLLOW THE
NATIONAL FUEL GAS CODE, ANSI Z223.1, OR NATURAL
GAS AND PROPANE INSTALLATION CODE, CSA B149.1.
If not installed, and maintained in accordance with the
manufacturer's instructions, this product could expose
you to substances in fuel or fuel combustion which are
known to the state of California to cause cancer, birth
defects, or other reproductive harm.
* For a copy of the homeowner’s care and operation
manual, go to www.lennox.com or call 1-800-9-lennox.
B-VENTED APPLIANCES NEED FRESH AIR FOR SAFE
OPERATION AND MUST BE INSTALLED SO THERE
ARE PROVISIONS FOR ADEQUATE COMBUSTION AND
VENTILATION AIR.
DIRECT VENTED APPLIANCES MUST NOT BE OPERATED
WITHOUT THE FRONT GLASS PANEL(S) INSTALLED.
DO NOT OPERATE APPLIANCE WITH BROKEN,
CRACKED OR MISSING GLASS DOORS OR ENCLOSURE
PANEL(S).
ELECTRONIC IGNITION WIRING DIAGRAM
P/N 62L2701_4
Optional Blower**
OFF/ON Switch
(Integral with
Gas Valve)
Honeywell
Electronic
Gas
Valve
120 VAC
Primary
Secondary
Junction Box
Break Off Tab
Junction Box
Pilot Burner
Assembly
BL
BL
Field Wired
Factory
Wired
BK = BLACK BL = BLUE
R = RED W = WHITE
G = GREEN
BK
BK
BK
BK
BL
R
GROUND
24 V
Transformer
J-Box Wiring
WITH Optional Blower Switch
J-Box Wiring
WITHOUT Optional Blower Switch
BK
W
G
CA
V
02
1
BK
W
G
CA
V
02
1
Igniter
Connector
*
**
Control Switches: Wall On/Off
Switch, Unit Mounted On/Off Switch,
Wall Thermostat (Direct-Vent Units
Only) or Remote Control Switch.
Some models are not approved for
use with an optional blower. See Care
and Operation manual for approved
accessories.
Schematic Representation Only
W
GR
BK
BK
R
Control
Switch *
DAMPER
SWITCH
HIGH LIMIT
SWITCH
B-Vent appliances only - one or both of these switches must
be factory installed in series as shown. If wires to these switches
are replaced, wires must be Type AWM 200°C - 18 gage wire ONLY.
NOTES:
1. If any of the original wire as supplied
must be replaced, use Type AWM
105°C - 18 gage wire ONLY.
2. 120 VAC, 60 Hz - Less than 3 Amps.
CAUTION: label all wires prior to
disconnection when servicing controls.
Wiring errors can cause improper and
dangerous operation. Verify proper
operation after servicing.
J-box Wiring
