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Safety Information

Safety Information

Carbon Monoxide Poisoning:

 Early signs of carbon monoxide 

poisoning  resemble  the  flu,  with  headaches,  dizziness,  or 

nausea.  If  you  have  these  signs,  the  fireplace  may  not  be 

working  properly. 

Get  fresh  air  at  once!

  Have  the  fireplace 

serviced.

Note:

 Some people are affected more than others by carbon 

monoxide. These may include pregnant women, people with 

heart or lung disease, are anemic, anyone under the influence 

of alcohol, and those at high altitude.

IMPORTANT:

 

Read this owners manual carefully 

and completely before trying to assemble, operate, 

or  service  this  fireplace.  Improper  use  of  this 

fireplace  can  cause  serious  injury  or  death  from 

burns, fire, explosion, electrical shock, and carbon 

monoxide poisoning.

General Safety Concerns

1.  If you smell gas
 

l

  Shut off gas supply.

 

l

  Do not try to light any appliance.

 

l

  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.

2.  This fireplace shall not be installed in a bedroom or 

bathroom.

3.  Never install the fireplace

 

  In a recreational vehicle.

 

  Where curtains, furniture, clothing, or other flammable

 

  objects  are  less  than  36  inches  from  the  front,  top,  or

 

  sides of the fireplace.

 

  In high traffic areas.

 

  In windy or drafty areas.

4.  Do not use this fireplace as a wood-burning fireplace. 

5.  Do not add extra logs or ornaments such as pine cones, 

vermiculite,  or  rock  wool.  Using  these  added  items  can 

cause soot build-up.

6.  This fireplace is designed to be smokeless. If logs appear 

to smoke, turn off fireplace and call a qualified service 

person.

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

allow fans to blow directly into the fireplace. Do not place 

a blower inside burn area of the firebox. Ceiling fans may 

create drafts that alter burner flame patterns. Soot build-up 

and improper burning will occur. Soot build-up can settle 

on household surfaces outside the fireplace.

8.  This fireplace needs fresh air ventilation to run properly. 

The Vent free decorative gas log set must have an 

oxygen depletion sensor (ODS) pilot light safety system. 

The ODS shuts down the fireplace if not enough fresh 

air is available. See Air for Combustion and Ventilation, 

page 10. If the fireplace keeps shutting off, see appliance 

manufacturers’ troubleshooting instructions.

9.  Do not run fireplace

 

  Where flammable liquids or vapors are used or stored.

 

  Under dusty conditions.

10.  Do not use this fireplace to cook food or burn paper or 

other objects.

11.  Never place any objects in the fireplace or on logs.

12.  Fireplace glass doors are not permitted in this decorative 

room heater. Fireplace front becomes very hot when 

running fireplace. Keep children and adults away from hot 

surfaces to avoid burns or clothing ignition. The fireplace 

will remain hot for a time after shut down. Allow surfaces 

to cool before touching.

13.  Carefully supervise young children when they are in the 

room with the fireplace.

14.  Do not use fireplace if any part has been exposed to or 

under water. Immediately call a qualified service technician 

to inspect the fireplace and to replace any part of the control 

system and gas control which has been under water.

15.  Do not operate the fireplace if any log is broken. Do not 

operate  the  fireplace  if  a  log  is  chipped  (dime-sized  or 

larger). Verify proper log placement prior to operating 

appliance.

16.  Turn  fireplace  off  and  let  cool  before  servicing.  Only  a 

qualified  service  person  should  service  and  repair  the 

fireplace.

17.  Operating the fireplace above elevations of 4,500 feet 

may cause pilot outage.

DO NOT USE OR STORE GASOLINE OR OTHER 

FLAMMABLE LIQUIDS OR GASES IN OR NEAR THE 

FIREPLACE!

ATTENTION:

 A fire or an explosion could occur causing property 

damage, injury or loss of life if you do not follow the information 

in this manual!

NOTE: THIS MANUAL MUST BE REPRODUCED ONLY IN 

ITS ENTIRETY.

DANGER:

Carbon monoxide poisoning may lead to 

death!

Summary of Contents for Mason-Lite MFPST43VF

Page 1: ...has been tested and approved by PFS under ANSI Z21 91 for use with any ANSI Z21 11 2 approved gas logs IMPORTANT READ THESE INSTRUCTIONS CAREFULLY BEFORE STARTING INSTALLATION OF THIS FIREPLACE Do no...

Page 2: ...to installing This appliance must be installed in accordance with local codes if any if not in accordance with the National Fuel Gas Code ANSI Z223 1 installation codes 01 26 2021 ANSI Z21 91 Ventless...

Page 3: ...ge or personal injury Customer Service Parts Replacement Parts and accessories may be purchased from your local dealer Additional information is available from Masonry Fireplace Industries Inc Accesso...

Page 4: ...ntended to serve as a primary heat source rather the fireplace was expressly created as a supplemental source of heat The MASON LITE is Designed to be used ONLY with approved Vent Free Decorative Gas...

Page 5: ...r burner flame patterns Soot build up and improper burning will occur Soot build up can settle on household surfaces outside the fireplace 8 This fireplace needs fresh air ventilation to run properly...

Page 6: ...and Installation Figure 3 W H D Figure 4 Height may vary Maintain 1 2 inch clearance to top of lintel see Fig 12 Model W H D MFPST43VF 53 40 nominal 28 Supporting Floor Systems Floor Framing It is imp...

Page 7: ...the general arrangement of anchorage to floor framing I Joist Simpson Strong Tie A 35 or equivalent Figure 6 I Joist Anchoring Top View Example Only I JO IST S Anchor Brackets Figure 7 I Joist Anchori...

Page 8: ...or support system Clearances Clearances The Importance of Clearances Warning to the structural engineer and or building contractor It is your responsibility to be certain that the Mason Lite can be pr...

Page 9: ...s from the firebox opening shall be kept at least twelve inches 12 from the top of the opening 12 NON COMBUSTIBLE ONLY ZONE 20 MIN 1 1 2 10 SAFE ZONE FOR PROJECTION OF COMBUSTIBLE MATERIAL TOP OF FIRE...

Page 10: ...defined as the passage of 1 grain of vapor through 1 square foot of 1 inch thick material in 1 hour under a pressure difference of 1 inch of mercury If your home meets all the three criteria above yo...

Page 11: ...e installation of a refractory fire brick liner This should be a minimum of 1 1 8 thick The liner will be applied within the walls of the firebox Modular firebrick panels are also available from MFI A...

Page 12: ...ireplace that will not be plumb or level What you are advised to do is make use of shims You will find these supplied with the MASON LITE and you can nudge them in between openings to achieve the prec...

Page 13: ...ned to use Mason Lite mortar sparingly because it does have such holding power you should look over the firebox assembly at the end and fill any gaps with mortar especially at joint connections Adjust...

Page 14: ...quirements for installation as outlined by the National Fuel Gas Code ANSI Z223 1 This gas pipe provision must only be connected to an approved vent free gas log heater certified to ANSI Z21 11 2 heat...

Page 15: ...the outside combustion air kit is to be installed The following Firebrick Patterns are available from MFI MFPST43 SHBL Herringbone Figure 28 MFPST43 FRBL Running Bond Figure 29 Initial Fireplace Opera...

Page 16: ...ncrete slab The concrete strength and durability shall comply with Sections 1903 1904 and 1905 of the International Building Code IBC TABLE R402 2 MINIMUM SPECIFIED COMPRESSIVE STRENGTH OF CONCRETE MI...

Page 17: ...ly b Lines defining areas are approximate only Local conditions may be more or less severe than indicated by region classification A severe classification is where weather conditions result in signifi...

Page 18: ...iate thereof liable in any respect for any injury or damage to the building or structure in which the fireplace has been installed or to the persons or property therein arising out of the use misuse o...

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