18
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT PLUS
®
B-VENT GAS FIREPLACES (MPB33/35/40/45) • CARE AND OPERATION INSTRUCTIONS
Normally, all parts should be ordered through
your Lennox Hearth Products distributor
or dealer.
Parts will be shipped at prevailing prices at
time of order.
When ordering repair parts, always provide:
1.
The model number of the appliance.
2.
The serial number of the appliance.
3.
The part number.
4.
The description of the part.
5.
The quantity required.
6.
The installation date of the appliance.
If you encounter any problems or have any
questions concerning the installation or
application of this system, please contact
your dealer or distributor.
LENNOX HEARTH PRODUCTS
1508 Elm Hill Pike, Suite 108
Nashville, TN 37210
visit us at www.LennoxHearthProducts.com
1-800-
655-2008
PRODUCT REFERENCE INFORMATION
We recommend that you record the
important reference information about your
fi replace in the space provided below.
Please call Lennox Hearth Products for
the phone number of your nearest Lennox
Hearth Products dealer who will answer your
questions or address your concerns.
Fireplace Model Number ________________________________________________
Fireplace Serial Number _________________________________________________
Date Installed _________________________________________________________
Type of Gas Used in Fireplace ____________________________________________
Dealer Name _________________________________________________________
TP-TH
TP
TH
APPLIANCE- MOUNTED
ON/OFF SWITCH
(OPTIONAL)
BK/W(1)
BK/W(1)
WALL-MOUNTED ON/OFF SWITCH (OPTIONAL)
THERMOSTAT (OPTIONAL)
WIRING DIAGRAM MILLIVOLT GAS VALVES
THERMOPILE
GAS VALVE
If any of the original wire as supplied must be replaced,
it must be replaced with Type AWM105
°
C – 18 GA. wire.
Thermopile
H
T
P
T
H
T
P
T
*TWIST WIRES “A” AND “B” TOGETHER TO OPERATE UNIT
SOLELY BY MANIPULATING THE GAS VALVE CONTROL KNOB;
OR CONNECT WIRES TO OPTIONAL ON/OFF SWITCH OR WALL
SWITCH OR REMOTE CONTROL RECEIVER TO OPERATE UNIT.
*OPTIONAL ON/OFF SWITCH,
WALL SWITCH, OR REMOTE
CONTROL RECEIVER
A
B
H
C
TI
W
S
TI
MI
L
WT
BK
BK
BK
Schematic Representation Only
Figure 15: Wiring Diagram—
Millivolt Gas Valves
CAUTION: LABEL ALL WIRES
PRIOR TO DISCONNECTION WHEN
SERVICING CONTROLS. WIRING
ERRORS CAN CAUSE IMPROPER
AND DANGEROUS APPLIANCE
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.
ORDERING REPLACEMENT PARTS
A complete parts list is found at the end of
this manual. Use only parts supplied from
the manufacturer.
With proper care and maintenance, your
appliance will provide many years of
enjoyment. If you should experience any
problem, fi rst refer to the troubleshooting
guide in this manual. If problem persists,
contact your Lennox Hearth Products dealer
or distributor.
WIRING DIAGRAMS
Wiring diagrams are provided here for
reference purposes only. This information is
also provided on schematics attached directly
to the appliance on a pullout panel located
within the control compartment.
BLOWER CONTROL CIRCUIT WIRING
120V, 60HZ, 1PH
Factory Wired
Ground
Field Wired
Junction Box
Tab Intact
Tab
Broken
Plug blower
into this
receptacle
n e
e r
G -
d
n u
o r
G
* Wall-mounted
ON/ OFF Blower
Switch or Variable
Speed Control Switch.
Blower
e t i
h
W -
l
a r t
u e
N
120 VAC - Black
Green
Ground
Screw
White
Green
Neutral
Side of
Receptacle
Hot
Side of
Receptacle
Red
Black
