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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT PLUS
®
B-VENT GAS FIREPLACES (MPB33/35/40/45) • CARE AND OPERATION INSTRUCTIONS
LIGHTING INSTRUCTIONS – MILLIVOLT GAS VALVE
FOR YOUR SAFETY, READ BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly, a fire or explosion may result, causing
property damage, personal injury, or loss of life.
A. This appliance has a pilot which must be lighted by a piezo
igniter. When lighting the pilot, follow these instructions
exactly.
B. BEFORE LIGHTING smell all around the appliance area for
gas. Be sure to smell next to the floor because some gas is
heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electric switch; do not use any phone in your
building.
1. STOP! Read the safety information above on this label.
2. (If applicable) Set the thermostat to lowest setting. Turn wall on/off
switch, unit mounted on/off switch or remote control switch "OFF."
3. Turn OFF all electric power to the appliance.
4. Access the control compartment.
5. Push in gas control knob slightly and turn clockwise to "OFF."
NOTE: Knob cannot be turned from "PILOT" to "OFF" unless knob is
pushed in slightly. Do Not force.
6. Wait five (5) minutes to clear out any gas. Then smell for gas, including
near the floor. If you smell gas, STOP! Follow "B" in the safety
information above on this label. If you don't smell gas, go to the next
step.
7. Find pilot—located in firebox on the same plane as the top of the burner.
8. Turn knob on gas control counterclockwise to "PILOT."
9. Push in control knob all the way and hold in. Immediately light the pilot
by triggering the piezo igniter (pushing the button) until pilot lights.
Continue to hold the control knob in for about 1-1/2 minutes after the
pilot is lit. Release knob and it will pop back up. Pilot should remain lit.
If it goes out, repeat steps 5 through 9.
• If knob does not pop up when released, stop and immediately call
your service technician or gas supplier.
LIGHTING INSTRUCTIONS
TO TURN OFF GAS TO APPLIANCE
• If the pilot will not stay lit after several tries, turn the gas control
knob to "OFF" and call your service technician or gas supplier.
10. Turn gas control knob counterclockwise to "ON."
11. Close control compartment.
12. (If applicable) Turn on all electrical power to the appliance.
13. (If applicable) Set thermostat to desired setting. Turn wall on/off switch,
unit mounted on/off switch or remote control switch "ON."
WARNING
HOT GLASS WILL CAUSE BURNS.
DO NOT TOUCH GLASS UNTIL COOLED.
NEVER ALLOW CHILDREN TO TOUCH GLASS.
• Immediately call your gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
C. Use only your hand to push in or turn the gas control knob.
Never use tools. If the knob will not push in or turn by hand,
don’t try to repair it, call a qualified service technician. Force
or attempted repair may result in a fire or explosion.
D. Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect the
appliance and to replace any part of the control system and
any gas control which has been under water.
4.
Push in gas control knob slightly and turn clockwise to "OFF."
Do not force.
5. Close the main line gas shut-off valve.
6. Close control compartment.
Pilot Assemblies
H I
LO
W
TPTH
TP
TH
PI
LOT
PI
LO
T
ON
iti
t
OF
F
OUT
OUT
IN
IN
LO
HI
IN
OUT
OFF
PILO
T
ON
PILOT
Gas Control Valves
SIT
Robertshaw
Gas Control Knobs
P/N 62L2901_4
1. (If applicable) Set the thermostat to lowest setting. Turn wall on/off
switch, unit mounted on/off switch or remote control switch "OFF."
2.
Turn OFF all electric power to the appliance, if service is to be
performed.
3.
Access the control compartment.
