Lennox Hearth Products MPD33RNM - User Manual

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MODELS

MPD Direct-Vent

Gas Fireplaces

CARE AND OPERATION INSTRUCTIONS

P/N 506017-06 Rev. NC 05/2012

This manual is one of a set of two supporting this product.

Refer to P/N 506015-07 for Installation Instructions.

Ce manuel est disponible en francais, simplement

en faire la demande. Numéro de la pièce 506223-44.

OTL Report No. 116-F-13-4

US

Portland

INSTALLER: Leave this manual with the appliance.

CONSUMER: Retain this manual for future reference.

INSTALLATEUR : Laissez cette notice avec l'appareil.

CONSOMMATEUR : Conservez cette notice pour consultation ultérieure.

DON’T

THROW

IT AWAY!

This manual contains

important operating

and safety

information.

Wait...

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F

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R

▪

E

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E

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See Page 2 For Details

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SAFETY

GUARD

PROTECTS AGAINST BURNS

Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Safety and Your Fireplace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

FREE Safety Guard Offer (Protects Against Burns) . . . . . . . . . . . . . . . . . 2

Important Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Attaching the Safety-in-Operation Warnings . . . . . . . . . . . . . . . . . . . . . 5

[EN FRANÇAIS] L’information de sûreté importante . . . . . . . . . . . . . . . 3–4

Apposition des mises en garde relatives à la sécurité d’utilisation . . . . 5

[EN ESPAÑOL] Información importante de seguridad . . . . . . . . . . . . . . 3–4

Colocación de advertencias de seguridad en operación . . . . . . . . . . . . 5

WARNING

/

AVERTISSEMENT

/

AVISO

AVERTISSEMENT : Assurez-vous de bien suivre les

instructions données dans cette notice pour réduire au

minimum le risque d’incindie ou d’explosion ou pour

éviter tout dommage matériel, toute blessure ou la mort.

WARNING: If the information in these instructions

is not followed exactly, a ﬁre or explosion may

result, causing property damage, personal injury,

or death.

• HOT GLASS WILL CAUSE

BURNS.

• DO NOT TOUCH GLASS

UNTIL COOLED.

• NEVER ALLOW CHILDREN

TO TOUCH GLASS.

• UNE SURFACE VITRÉE CHAUDE

PEUT CAUSER DES BRÛLURES.

• LAISSER REFROIDIR LA SURFACE

VITRÉE AVANT D'Y TOUCHER.

• NE PERMETTEZ JAMAIS À UN ENFANT

DE TOUCHER LA SURFACE VITRÉE.

• EL VIDRIO CALIENTE

CAUSARÁ QUEMADURAS.

• USTED DEBE NUNCA

TOCAR EL VIDRIO CALIENTE.

• LOS NIÑOS DEBEN NUNCA

TOCAR EL VIDRIO.

- Do not store or use gasoline or other flammable

vapors and liquids in the vicinity of this or any other

appliance.

- WHAT TO DO IF YOU SMELL GAS:

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any

phone in your building.

• 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.

- Installation and service must be performed by a

qualified installer, service agency or the gas supplier.

- Ne pas entreposer ni utilizer d’essence ni d’autres vapeurs

ou liquides inﬂammables dans le voisinage de cet appareil

ou de tout autre appareil.

- QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ :

• Ne pas tenter d’allumer d’appareil.

• Ne touchez à aucan interrupteur. Ne pas vous servir des

téléphones se trouvant dans le bâtiment où vous trouvez.

• Appelez immédiatement votre fournisseur de gaz depuis

un voisin. Suivez les instructions du fournisseur.

• Si vous ne pouvez rejoindre le fournisseur de gaz,

appelez le service des incindies.

- L’installation et l’entretien doivent être assurés par un

installateur ou un service d’entretien qualiﬁé ou par le

fournisseur de gaz.

MILLIVOLT: ELECTRONIC:

MPDT33RNM

MPDT33RPM

MPDR33RNM

MPDR33RPM

MPD35RNM

MPD35RPM

MPD40RNM

MPD40RPM

MPD45RNM

MPD45RPM

MPDT33RNE

MPDR33RNE

MPD35RNE

MPD40RNE

MPD45RNE

Table of Contents

Questions and Answers

R
Rachael MitchellAug 20, 2025
How to fix a pilot light that won't stay lit on my Lennox Hearth Products Indoor Fireplace?
- V
  Veronica HoAug 20, 2025
  If the pilot light on your Lennox Hearth Products Indoor Fireplace won't stay lit after following the lighting instructions, it could be due to a defective pilot generator (thermocouple). Ensure the pilot flame is correctly impinging on the thermocouple. Clean and/or adjust the pilot for maximum flame impingement on the thermocouple. Also, check that the connection between the valve and thermocouple is tight and secure.
K
Kyle AndersonAug 25, 2025
Why does my Lennox Hearth Products MPD33RNM Indoor Fireplace frequently have pilot/burner outages?
- R
  Rebecca RiceAug 25, 2025
  If you're experiencing frequent pilot/burner outages with your Lennox Hearth Products Indoor Fireplace, it could be due to the pilot flame being too low or blowing too high. This can cause the pilot/valve safety to drop out. Clean and/or adjust the pilot flame to ensure maximum flame impingement on the thermocouple.
N
nschmidtSep 4, 2025
Why won't the pilot light stay lit on my Lennox Hearth Products Indoor Fireplace?
- L
  Leah JacobsSep 4, 2025
  If the pilot light won't stay lit in your Lennox Hearth Products Indoor Fireplace after you've carefully followed the lighting instructions, it could be due to a defective pilot generator, also known as a thermocouple. Ensure the pilot flame is directly impinging on the thermocouple. Clean and adjust the pilot to maximize the flame's contact with the thermocouple. Also, make sure the connection between the valve and the thermocouple is tight and secure.
T
Tiffany AcevedoSep 8, 2025
What causes frequent pilot/burner outages in a Lennox Hearth Products Indoor Fireplace?
- B
  bradcantrellSep 8, 2025
  If you're experiencing frequent pilot or burner outages with your Lennox Hearth Products Indoor Fireplace, it could be that the pilot flame is either too low or too high (blowing), causing the pilot/valve safety to shut down. To resolve this, clean and/or adjust the pilot flame to ensure maximum flame impingement on the thermocouple.
M
Margaret MoodyNov 12, 2025
What to do if the spark igniter won't light the pilot on my Lennox Hearth Products MPD33RNM?
- T
  Tammy GarrettNov 12, 2025
  If the spark igniter on your Lennox Hearth Products Indoor Fireplace isn't lighting the pilot, here's what to check: 1. **Check for a spark:** Look for a spark at the electrode and pilot. If there's no spark and the electrode wire is connected properly, the igniter might be defective and needs replacement. 2. **Defective or misaligned electrode:** Try lighting the pilot with a match. If it lights, the gas mixture might be off, needing a longer purge. If it still doesn't light, check the gap at the electrode and pilot; it should be about 1/8 inch for a strong spark. If the gap is correct, the pilot might need replacing. 3. **Gas supply pressure:** Ensure the inlet gas pressure is within the limits specified on the rating plate. 4. **Pilot orifice:** A plugged pilot orifice can prevent ...
K
Kelsey SmithNov 16, 2025
Why is my Lennox Hearth Products MPD33RNM pilot lit but the burner won't ignite?
- M
  Miss Lisa SawyerNov 16, 2025
  If the pilot light is on, but no gas is going to the burner on your Lennox Hearth Products Indoor Fireplace, even with the valve knob and wall switch in the “ON” position, consider the following: * **Wall switch and wiring:** Check the wall switch and its wiring for proper connections. You can bypass the wall switch by using a jumper wire across its terminals. If the burner then comes on, the wall switch is defective and needs replacement. If the switch is okay, try jumping the wires across the wall switch wires at the valve. If the burner comes on, the wires are faulty, or the connections are bad. * **Thermopile voltage:** The thermopile may not be generating enough millivoltage. Use a millivolt meter to check the thermopile terminals on the gas valve. With the optional wall switch “...
M
Michelle HarrisNov 27, 2025
What to do if the pilot is burning but there's no gas to the burner in my Lennox Hearth Products Indoor Fireplace?
- J
  jaustinNov 27, 2025
  If the pilot light is burning but no gas is reaching the burner, with the valve knob and wall switch in the “ON” position, the issue could stem from several causes. First, the wall switch or its wiring might be defective; inspect them for secure connections. You can bypass the wall switch by using a jumper wire across its terminals; if the burner ignites, the switch needs replacement. If the switch is functional, try bypassing the wires at the valve with a jumper wire; if the burner then ignites, the wiring is likely faulty or poorly connected. Another potential cause is that the thermopile isn't generating sufficient millivoltage. Use a millivolt meter to assess the thermopile at the gas valve terminals; it should register at least 325 millivolts with the optional wall switch in the “OFF”...
T
Taylor Watson MDDec 1, 2025
How to fix a spark igniter that won't light the pilot in my Lennox Hearth Products Indoor Fireplace?

Lennox Hearth Products MPD33RNM Specifications

General

Brand	Lennox Hearth Products
Model	MPD33RNM
Category	Indoor Fireplace
Language	English

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