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Astria Fireplaces EOS18MN - User Manual

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INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
This appliance may be installed in an aftermarket permanently located, manufactured (mobile) home,
where not prohibited by local codes. This appliance is only for use with the type of gas indicated on the
rating plate. This appliance is not convertible for use with other gases.
WARNING: This appliance is for installation only in a solid-fuel burning masonry or UL127 factory-built
fireplace or in a listed ventless firebox enclosure. It is design-certified for these installations in accordance
with ANSI Z21.11.2. Exception: DO NOT install this appliance in a factory-built fireplace that includes
instructions stating it has not been tested or should not be used with unvented gas logs.
This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is installed. Provisions
for adequate combustion and ventilation air must be provided. Refer to Air for Combustion and Ventilation
section on Page 6 of this manual.
Installation and Operation Instructions
Unvented (Vent-Free) Gas Log Heater
Models
PFS
®
US
Report No. F09-129
EOS18MN
EOS18MP
P/N 126854-01 REV. F 03/2019
For use with log sets
ChestnutH18
ChestnutH24
CarolinaOak18
CarolinaOak24
P126854-01
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in serious injury, death, or property damage.
- 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.
Leave the building immediately.
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.

Questions and Answers

  • C
    Chloe AcostaAug 19, 2025
    What to do if my Astria Fireplaces Gas Heater sparks but doesn't ignite?
    • L
      Lisa CookAug 19, 2025
      If your Astria Fireplaces Gas Heater is sparking but not igniting, the issue could stem from several causes. First, ensure that the gas supply is turned on and the equipment shutoff valve is open. Then, check that the control knob is in the PILOT position and pressed in. If there's air in the gas lines from a recent installation, keep holding down the control knob and repeat the ignition until the air is removed. For propane/LP models, verify that the gas supply isn't depleted. Also, the ODS/pilot might be clogged, requiring cleaning or replacement. Finally, the gas regulator setting might be incorrect, necessitating its replacement.
  • G
    Gwendolyn SmithAug 21, 2025
    How to fix no spark at pilot on Astria Fireplaces EOS18MN Gas Heater?
    • S
      Steven GarrisonAug 21, 2025
      If there's no spark at the ODS/pilot when you press the igniter button on your Astria Fireplaces Gas Heater, the following steps may help: * First, check if the igniter electrode is connected to the igniter cable and reconnect if necessary. * Ensure the igniter cable isn't pinched or wet; free it from any obstructions and keep it dry. * Tighten the piezo igniter nut located behind the base panel. * If the igniter cable is broken, replace it. If the piezo igniter is faulty, replace it as well. * Lastly, if the igniter electrode is positioned wrong or broken, replace the pilot assembly.
  • W
    weissdanielleAug 23, 2025
    Why does the pilot light go out on my Astria Fireplaces Gas Heater when I release the control knob?
    • J
      Jennifer HensonAug 23, 2025
      If the ODS/pilot lights but the flame goes out when you release the control knob on your Astria Fireplaces Gas Heater, ensure the control knob is fully pressed in and held for at least 30 seconds after the pilot lights. The safety interlock system may have been triggered; wait one minute and repeat the ignition process. Also, verify that the equipment shutoff valve is fully open. The pilot flame might not be adequately touching the thermocouple due to low gas pressure or a dirty/clogged ODS/pilot. Contact your gas company to check the pressure and clean or replace the ODS/pilot assembly. Check that the thermocouple connection is snug at the control valve, and if the thermocouple or control valve is damaged, replace the pilot assembly or control valve, respectively.
  • S
    samantha32Aug 26, 2025
    Why does my Astria Fireplaces EOS18MN Gas Heater smell?
    • C
      Catherine AndersonAug 26, 2025
      If your Astria Fireplaces Gas Heater produces unwanted odors, it could be due to several reasons. The heater might be burning vapors from paint, hair spray, glues, cleaners, chemicals, or new carpet. Ventilate the room by opening a window and stop using odor-causing products while the heater is running. For propane/LP models, a low fuel supply can also cause odors, so refill the supply tank. Finally, a gas leak could be the source; locate and correct any leaks.
  • V
    Valerie KimAug 27, 2025
    What to do if burner won't light on Astria Fireplaces EOS18MN after pilot is lit?
    • S
      stevensjustinAug 28, 2025
      If the burner on your Astria Fireplaces Gas Heater doesn't light after the ODS/pilot is lit, it could be due to a few reasons. The inlet gas pressure might be too low, so contact your local gas company. The burner orifices might be clogged, requiring cleaning or replacement. If you have a Remote-Ready model, check that the thermopile leads are properly connected and replace the batteries in the transmitter and receiver.
  • M
    megan18Aug 29, 2025
    Why does my Astria Fireplaces EOS18MN Gas Heater keep shutting off?
    • C
      Christopher Davis MDAug 30, 2025
      If your Astria Fireplaces Gas Heater shuts off during use while the ODS is operating, it might not be getting enough fresh air; try opening a window or door for ventilation. Low line pressure could also be the cause, so contact your local gas company. Alternatively, the ODS/pilot might be partially clogged, requiring cleaning.
  • C
    Courtney BeltranSep 1, 2025
    Why do I smell gas when my Astria Fireplaces EOS18MN is on?
    • C
      Cynthia PerezSep 1, 2025
      If you smell gas during combustion with your Astria Fireplaces Gas Heater, there might be foreign matter between the control valve and burner; take apart the gas tubing and remove any foreign matter. It could also indicate a gas leak. Locate and correct all leaks.
  • K
    Kathleen JordanSep 3, 2025
    Why is there a delay when my Astria Fireplaces Gas Heater burners ignite?
    • M
      Morgan ChavezSep 3, 2025
      A delayed ignition of one or both burners in your Astria Fireplaces Gas Heater can be due to low manifold pressure; contact your local gas company. Another cause could be clogged burner orifices, which should be cleaned or replaced.
  • C
    Charles RamosSep 5, 2025
    What causes burner backfiring in Astria Fireplaces EOS18MN Gas Heater?
    • M
      Michael HebertSep 5, 2025
      Burner backfiring during combustion in your Astria Fireplaces Gas Heater can occur if the burner orifice is clogged or damaged; clean the burner or replace the orifice. A damaged burner or a defective gas regulator can also cause backfiring; replace the damaged burner or gas regulator.
  • A
    Aimee HallSep 7, 2025
    Why do I smell gas from my Astria Fireplaces EOS18MN when it's off?
    • N
      Nathan AndersonSep 7, 2025
      If you smell gas from your Astria Fireplaces Gas Heater even when the control knob is in the OFF position, it could be due to a gas leak. Locate and correct all leaks. Alternatively, the control valve might be defective and need replacement.

Astria Fireplaces EOS18MN Specifications

General IconGeneral
BrandAstria Fireplaces
ModelEOS18MN
CategoryGas Heater
LanguageEnglish