Monessen Hearth DFS42PVC User Manual

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10.  This unit complies with ANSI Z21.11.2 Unvented

 Heaters.

11.  Do not install the heaters in a bathroom or bedroom.
12.  Correct installation of the ceramic fiber logs, proper 

location of the heater, and annual cleaning are necessary 
to avoid potential problems with sooting. Sooting, 
resulting from improper installation or operation, 
can settle on surfaces outside the fireplace. See log 
placement instructions for proper installation.

13.  Avoid any drafts that alter burner flame patterns. Do not 

allow fans to blow directly into fireplace. Do not place 
a blower inside burn area of firebox. Ceiling fans may 
create drafts that alter burner flame patterns. Sooting 
and improper burning will occur.

14.  Caution: Candles, incense, oil lamps, etc. produce 

combustion byproducts including soot. Vent-free 
appliances will not filter or clean soot produced by 
these types of products. In addition, the smoke and/or 
aromatics (scents) may be reburnt in the vent-free 
appliance which can produce odors. It is recommended 
to minimize the use of candles, incense, etc. while the 
vent-free appliance is in operation. 

15.  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. See page 10. 

16.  Keep room area clear and free from combustible 

materials, gasoline and other flammable vapors and 
liquids.

INSTALLER
Please leave these instructions with the appliance.

OWNER
Please retain these instructions for future reference.

Read these instructions carefully before installing or trying to operate this vent-free gas heater.

  1. Due to high temperatures, the appliance should 

be located out of traffic and away from furniture 
and draperies.

  2.  Children and adults should be alerted to the hazard 

of high surface temperature and should stay away to 
avoid burns or clothing ignition.

  3.  Young children should be carefully supervised when 

they are in the same room with the appliance. 

  4.  Do not place clothing or other flammable material 

on or near the appliance. 

  5. Any safety screen or guard removed for servicing 

an appliance, must be replaced prior to operating 
the heater.

  6.  Installation and repair should be done by a qualified 

service person.

  7.  To prevent malfunction and/or sooting, an unvented 

gas heater should be cleaned before use and at least 
annually by a professional service person. More 
frequent cleaning may be required due to excessive 
lint from carpeting, bedding materials, etc. It is 
imperative that control compartments, burners and 
circulating air passageways be kept clean.

8.   CARBON MONOXIDE POISONING: Early signs of 

carbon monoxide poisoning are similar to the flu with 
headaches, dizziness and/or nausea. If you have these 
signs, obtain fresh air immediately. Have the heater 
serviced as it may not be operating properly.

9.   The installation must conform with local codes or, in 

the absence of local codes, with the National Fuel Gas 
Code, ANSI Z223.l/NFPA54.