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Instructions

Models MGFP39/44/49

Equipped with Safety Pilot System / Remote Control Valve

Do not store or use gasoline or other 
fl ammable 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 and follow the gas 
supplier’s instructions.
If you cannot reach your gas supplier, 
call the fi re department.

Installation and service must be 
performed by a qualifi ed installer, service 
agency, or the gas supplier.


n

WARNING:

If the information in these instructions is 
not followed exactly, a fi re or explosion 
may result causing property damage, 
personal injury or death.

REV 10/23/2012

Gas Fireplace with Masonry Firebox

The logs and burner must be permanently installed in and 
are only for use in this 

fi

 replace.  This 

fi

 replace must be 

connected to a working 

fl

 ue meeting the requirements of 

the ANSI Z21.50 standard.

Solid-fuels shall not be burned in this fi replace.

This appliance must be vented vertically through the 
roof. This appliance is not for installation in manufactured 
or mobile homes. The installation, including provisions 
for combustion, ventilation air, and required minimum 
permanent vent opening, must conform with the National 
Fuel Gas Code (ANSI Z223.1/NFPA 54) and applicable 
local building codes. 

This gas fi replace is designed to 

burn with yellow fl ames; thus adequate ventilation is 
absolutely necessary.

IMPORTANT:

 READ THESE INSTRUCTIONS

CAREFULLY BEFORE STARTING

INSTALLATION OF THIS FIREPLACE. 

n

WARNING:

This gas appliance must not be connected to a chimney 
fuel servicing a solid fuel burning appliance.

Do not store gasoline or other 

fl

 ammable vapors and liquids in the vicinity of this or any other appliance.

Report No.

08-154

ICC Evaluation Services 
Report No. 2401

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, unless a certi

fi

 ed kit is used.

Installer:

 Leave these instructions with the consumer.

Consumer:

 Retain for future reference.

Summary of Contents for MGFP39

Page 1: ...requirements of the ANSI Z21 50 standard Solid fuels shall not be burned in this fireplace This appliance must be vented vertically through the roof This appliance is not for installation in manufactured or mobile homes The installation including provisions for combustion ventilation air and required minimum permanent vent opening must conform with the National Fuel Gas Code ANSI Z223 1 NFPA 54 an...

Page 2: ...THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 3: ...L See MFI s installation and operating instructions for this model Contact local building officials about restrictions and installation specifications in your area THIS FIREPLACE IS DESIGNED FOR USE ONLY WITH THE ANSI Z21 50 DECORATIVE GAS LOGS AND BURNER TESTED AND APPROVED FOR THIS FIREPLACE Consult instructions included with this firebox for further information WARNING Use only approved listed ...

Page 4: ...nchoring components WARNING Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this appliance may result in property damage or personal injury Figure 1 1 2 4 5 7 8 9 10 16 15 14 12 6 3 3A 7 8 11 17 10 18 19 ...

Page 5: ... 44 49 Fireplace Parts List ITEM P N DESCRIPTION QTY 1 MFP39 1 MFP44 1 MFP49 1 HEARTH Left or Right 2 2 MFP39 2 MFP44 2 MFP49 2 REAR WALL 3 3 MFP39 3 MFP44 3 MFP49 3 SIDE WALL 7 3A MFP39 3A MFP44 3A MFP49 3A SIDE WALL with 4 opening for Air Kit 1 4 MFP39 4 MFP44 4 MFP49 4 SMOKE SHELF Downdraft Diverter 1 5 MFP39 5 MFP44 5 MFP49 5 DOME REAR LOWER 1 6 MFP39 6 MFP44 6 MFP49 6 LINTEL 1 7 MFP39 7 MFP44...

Page 6: ...bottom log 24 Rear bottom log 30 1 12 LML 24BF LML 30BF Front bottom log 24 Front bottom log 30 1 13 MFP 214 Burner Grate Brackets 2 2 Before beginning installation be sure the burner system is complete by comparing its contents with this Parts List Parts may differ depending upon the size of the set purchased Be sure you know the model number and size of your set when ordering replacement or opti...

Page 7: ...cted to understand each phase completely before going on to subsequent instructions Attention Be advised that all the illustrations in this manual are for general reference only Do not scale drawings Actual design elements will vary from case to case Pay attention to specified minimum clearances to combustibles WARNING Under no circumstances should you allow children to remain unattended while a f...

Page 8: ...arts and accessories Use of other controls parts and accessories which are not designed for use with MASON LITE gas fireplaces is prohibited and will void all warranties certifications listings and building code approvals and may cause property damage personal injury or loss of life The burner included with this gas fireplace is non convertible and only meant to be used with the gas listed on the ...

Page 9: ...all safer for everyone concerned At the least reading these procedures will save you time and at the most it will prevent any malfunction that could result in property damage or serious injury Do not start the installation until you have checked out all the local regional state and national rulings laws and codes as they apply to fireplaces and fireplace installations Every community is different ...

Page 10: ... the addition of floor joists to align with the anchor brackets allows the brackets to be directly connected to the floor joists Note that additional floor joists may be required to support the weight of the firebox and chimney Where the floor joists run parallel to the front of the firebox anchorage can be accomplished in like manner as shown in Figure 6 using blocking between the floor joist For...

Page 11: ... Deflection Limits Construction L S or W D L1 Floor Members I 360 I 240 1 For wood structural members having a moisture content of less than 16 per cent at time of installation and used under dry conditions the deflection resulting from L 0 5D is permitted to be substituted for the deflection resulting from L D Note that MASON LITE cannot accept responsibility for structural floor support details ...

Page 12: ...ials needed for wood floor installations MGFP39 Six 6 pieces 3 8 rebar x 36 long included with unit Six 6 ea All thread x 12 long with nuts and washers MGFP 44 49 Eight 8 pieces 3 8 rebar x 36 long included with unit Eight 8 ea All thread x 12 long with nuts and washers ALL UNITS Three 3 90 lb bags of ready mix concrete with 1 4 or smaller aggregate SURFACE CRACKS The MASON LITE FIRE PLACES are ma...

Page 13: ...eck for surface flatness level if necessary Figure 13 1 2 away from edges 1 2 mortar bead typical Hearth section shown prepared for Right Side position Apply mortar bead to all mating surfaces Apply mortar to the remaining Hearth except this time apply beading on surface to be facing floor as shown in Figure 14 1 2 3 4 5 Figure 14 Hearth shown prepared for Left Side position Before installing side...

Page 14: ...beveled face lines up with the inward angles of the lintel sides Resulting top surfaces should be level Figure 20 Lower Dome Sides Rating Plate faces inside Verify that the smoke dome side front and rear walls are aligning correctly and that the surfaces are smooth and uniform Make sure connections are covered with an adequate amount of mortar Remember that you have the option of using shims but t...

Page 15: ...e 24 Figure 25 Fireplace Finishes Combustible Trim Clearances Mantel and Mantel Shelf Clearances As with any radiant heat fireplaces all Mason Lite Fireplaces must comply with building code safety clearances per units that have openings of 6 sq ft six square feet or greater You must keep combustibles such as trim 8 away from the firebox opening for mantel clearances see Figure 26 Combustible mater...

Page 16: ...ion If instructions are not followed the warranty on the product will become null and void 3 1 2 3 4 5 Note that the most important aspect of the installation is the maintenance of minimum required clearances to combustible materials Those specific installation requirements must be followed with great precision as you are dealing with the potential of fire hazard if the correct combustible limit i...

Page 17: ...gree offset component and for every offset component two elbow components One elbow begins the installation procedure and the second elbow is used to finish off each section In all likelihood a 30 degreeoffsetelbowwillprobablybethefirsthardwareusedoff the top of the anchor plate damper Note Under no circumstances should you use an offset elbow in place of a return elbow They have distinct purposes...

Page 18: ...permitted if they do not exceed a 45 inclination The total lengths of the two offsets are not required to meet the 75 allowable rule Example 3 Shows a single offset at 45 of inclination and therefore the lateral length at 10 ft of offset does not have to meet the 75 rule In each case the offsets must be supported and firestops must be positioned wherever the vent must pass through a sub floor ceil...

Page 19: ...ater or in a high humidity area the manufacturer recommends a top quality rust proof paint especially formulated for metal Follow the paint manufacturer s directions applying the paint well before you are scheduled to install the round top termination unit or any of the flashings or flues that will be exposed to outside weather conditions Venting terminals shall not be recessed into walls or sidin...

Page 20: ...r hole in the firebox Center the black steel baffle with the spill switch sensor pointed toward the room out of the fireplace Use six 6 drywalls screws to fasten it in place on the front most part of the firebox ceiling as shown through the six 6 pre drilled holes Attach the trim plates to the left and right side of the baffle with the sheet metal screws so that the edges are flush with the firebr...

Page 21: ...ve Note The required 1 8 NPT up stream pressure tap is built into the valve Figure 33 CAUTION CHECK ALL CONNECTIONS FOR GAS LEAKS USING A HALF AND HALF SOAPY WATER SOLUTION IF A LEAK IS DETECTED TIGHTEN CONNECTIONS AND TEST AGAIN NEVER USE AN OPEN FLAME TO CHECK FOR GAS LEAKS Insert a one way screw into the hole in the front of each bracket and tighten with a long min 12 screw driver until contact...

Page 22: ...e keeping the back parallel with the burner pipe Figure 36 Place top logs across the front and back logs in the order and positions shown in Figure 40 1 2 3 WARNING Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this appliance may result in property damage or personal injury Log Placement Log Placement 1 GML 24 shown Figure 3...

Page 23: ... supplier TO CHECK UPSTREAM GAS PRESSURE Unscrew the four 4 screws above and below the control panel face then pull the control panel out far enough to expose the test ports on the valve Figure 41 Unscrew the port marked IN part way and test CAUTION Do not kink the flex connectors coming from the valve while accessing it Note Pilot flame should encircle top of electrodes See instructions cover for...

Page 24: ...millivolt meter Should be 250 millivolts or more b Pilot flame making a blowing sound b Pilot needs adjusting see Checking and Adjusting the Pilot on page 22 c Generator wire leads attached to the wrong terminals on the valve c Connect leads per wiring diagram previous page d Defective thermo magnetic safety in valve d Replace valve 2 Pilot Burning No Gas to Burner a Safety valve not turned to the...

Page 25: ...oncrete 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 MINIMUM SPECIFIED COMPRESSIVE STRENGTH a f c Weathering Potential b TYPE OR LOCATION OF CONCRETE CONSTRUCTION Negligible Moderate Severe Basement walls foundations and other concrete not exposed to the...

Page 26: ...ely 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 significant snowfall combined with extended periods during which there is little or no natural thawing causing deicing salts to be used extensively ...

Page 27: ...ty thereof is not responsible for any labor costs or indirect costs incurred for the replacement of defective components MFI is not responsible for misuse or mishandling of component parts Nothing in this warranty makes MFI or any entity 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 therei...

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