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Outdoor Lifestyles by Hearth & Home Technologies  •  TWILIGHT-II-MDC Installation Manual  •  2369-970 Rev. L  •  8/19  

Model:

Installation Manual

Installation and Appliance Setup

INSTALLER:  Leave this manual with party responsible for use and operation.

OWNER:  Retain this manual for future reference.

NOTICE: DO NOT

 discard this manual!

In the Commonwealth of Massachusetts installation must be 

performed by a licensed plumber or gas fitter.

See Table of Contents for location of additional Commonwealth 

of Massachusetts requirements.

TWILIGHT-II-MDC

This appliance may be installed as an OEM 

installation in manufactured home (USA 

only) or mobile home and must be installed 

in accordance with the manufacturer’s 

instructions and the 

Manufactured Home 

Construction and Safety Standard,

 

Title 24 

CFR, Part 3280 

in the United States, or the 

Standard for Installation in Mobile Homes, 

CAN/CSA Z240 MH Series,

 in Canada.

This appliance is only for use with the type(s) 

of  gas  indicated  on  the  rating  plate.  This 

appliance is not convertible for use with other 

gases, unless a certified kit is used.

DANGER

HOT GLASS 

WILL 

CAUSE BURNS.

DO NOT TOUCH 

GLASS 

UNTIL COOLED.

NEVER 

ALLOW CHILDREN

 TO TOUCH GLASS

.

A  barrier  designed  to  reduce  the  risk  of 

burns from the hot viewing glass is provided 

with this appliance and shall be installed for 

the  protection  of  children  and  other  at-risk 

individuals.

• 

DO NOT

 store or use gasoline or other flam

-

mable 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 sup

-

plier’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.

WARNING: 

FIRE OR EXPLOSION HAZARD

Failure to follow safety warnings exactly 

could result in serious injury, death, or 

property damage. 

Summary of Contents for TWILIGHT-II-MDC

Page 1: ...use with the type s of gas indicated on the rating plate This appliance is not convertible for use with other gases unless a certified kit is used DANGER HOT GLASS WILL CAUSE BURNS DO NOT TOUCH GLASS UNTIL COOLED NEVER ALLOW CHILDREN TO TOUCH GLASS A barrier designed to reduce the risk of burns from the hot viewing glass is provided with this appliance and shall be installed for the protection of ...

Page 2: ... Requirements for the Commonwealth of Massachusetts 6 2 Getting Started A Design and Installation Considerations 7 B Tools and Supplies Needed 8 C Inspect Appliance and Components 8 3 Framing and Clearances A Appliance Dimension Diagram 9 B Clearances to Combustibles 10 4 Termination Location and Vent Information A Vent Terminal Clearances 12 5 Appliance Preparation A Removing Non combustible Faci...

Page 3: ...tting for installation type ___________________________ Finishing Section 8 Pg 23 30 Combustible materials not installed in non combustible areas ___________________________ Verified all clearances meet installation manual requirements ___________________________ Mantels and wall projections comply with installation manual requirements ___________________________ Appliance Setup Section 9 Pg 31 33...

Page 4: ...ances for Use at High Altitudes A Appliance Certification NOTICE This installation must conform with local codes In the absence of local codes you must comply with the National Fuel Gas Code ANSI Z223 1 latest edition in the U S A and the CAN CGA B149 Installation Codes in Canada E BTU Specifications MODEL TWILIGHT II MDC LABORATORY Underwriters Laboratories Inc UL TYPE Direct Vent Gas Appliance S...

Page 5: ...rnace at 750 ºC shall be considered non combustible materials H Combustible Materials Specification Materials made of or surfaced with wood compressed pa per plant fibers plastics or other material that can ignite and burn whether flame proofed or not or plastered or unplastered shall be considered combustible materials I Electrical Codes NOTICE This appliance must be electrically wired and ground...

Page 6: ...rizontally vented gas fu eled heating appliance or equipment The sign shall read in print size no less than one half 1 2 in in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OB STRUCTIONS Inspection The state or local gas inspector of the side wall horizon tally vented gas fueled equipment shall not approve the installation unless upon inspection the inspector ob serves carbon monoxide detectors a...

Page 7: ...en may be used on the open sides of the shelter 14x18 and 16x18 screen mesh is approved for use DO NOT use solar screen or no see um screen The TWILIGHT II MDC has been carefully engineered to provide a unique fireplace experience Since it is different than any other product on the market care must be taken when installing this appliance so that our customer does not experience undesirable perform...

Page 8: ...plies Needed Before beginning the installation be sure that the following tools and building supplies are available Tape measure Framing material Pliers High temperature caulking material Hammer Phillips screwdriver Gloves Framing square Voltmeter Electric drill and bits 1 4 in Plumb line Safety glasses Level Reciprocating saw Manometer Flat blade screwdriver Non corrosive leak check solution 1 2 ...

Page 9: ...ng and Clearances A Appliance Dimension Diagram Dimensions are actual appliance dimensions Use for reference only Figure 3 1 Appliance Dimensions OUTDOOR OUTDOOR Location Inches Millimeter A 2 1 4 57 B 4 3 4 121 C 1 2 13 D 43 1092 E 24 610 F 46 7 8 1191 G 46 7 8 1191 H 9 1 2 241 I 2 1 2 64 J 4 1 2 114 K 32 5 8 829 Location Inches Millimeter L 36 1 4 921 M 41 7 8 1064 N 21 1 2 546 O 6 1 8 155 P 38 ...

Page 10: ... vary due to individual design preference WARNING Risk of Fire The exterior side of the TWILIGHT II MDC CANNOT be recessed into the framing GLASS EXTERIOR INSULATED ENVELOPE GLASS A B B D C 24 INCH MAX B GLASS FLUSH TO EXTERIOR INSULATED ENVELOPE GLASS E C NOTE Appliance may be installed flush on exterior interior or anywhere in between Any projection of the appliance interior or exterior must hav...

Page 11: ... vapor bar riers and sagging or loose insulation See Section 5 B Placing Insulation in Framing for exception to factory supplied insulation Locate and install appliance to all clearance specifications in manual The chase must be properly blocked to prevent blown insulation or other combustibles from entering and making contact with fireplace Failure to maintain airspace may cause overheating and a...

Page 12: ... mechanical or non mechanical 9 in min 229 mm min 12 in min 305 mm min I clearance to a mechanical powered air supply inlet All mechanical air intakes within 10 feet of a horizontal termination cap must be a minimum of 3 feet below termination 3 ft 914 mm 6 ft 1 8 3m J On public property clearance above paved sidewalk or a paved driveway 54 in 1 3 m 54 in 1 3 m A vent shall not terminate directly ...

Page 13: ...TAL HEARTH STRIP UNDER EDGE OF APPLIANCE APPLY HIGH TEMPERATURE SEALANT 300 F 149 C min BOTH SIDES APPLIANCE EXTERIOR A Removing Non combustible Facing Ma terial Assembly The non combustible assembly is located on right hand side of appliance when looking from outdoor side of appliance Hold non combustible pieces in place Remove and save two screws from upper bracket Remove non combustible pieces ...

Page 14: ...shims Keep nailing tabs flush with the framing Secure the appliance to the framing by using nails or screws through the nailing tabs Placing Flashing and Sheathing Apply high temperature silicone sealant to corner edges of fireplace flange see Figure 5 3 Figure 5 3 Application of High Temperature Sealant Figure 5 4 Header Flashing Installation Install outdoor flashing header sheet metal piece remo...

Page 15: ...n combustible sheath ing and MAY extend over the flashing behind non com bustible sheathing a maximum of 1 inch Use high temp silicone or sealant recommended by the manufacturer of the housewrap to seal between combustible sheathing house wrap and non combustible sheathing The sealant material used within 6 inches of the top and 1 inch on the sides of the fireplace surround must be approved to a m...

Page 16: ...tallation of Non combustible Facing Material Outdoor Side Fire Risk Follow these instructions exactly Facing materials must be installed properly to prevent fire No materials may be substituted without authorization by Hearth Home Technologies Center and attach two top boards the two shorter pieces to the framing members See Figure 5 8 Attach the left and right side pieces to the framing mem bers ...

Page 17: ...formation NOTICE Waterproof insulated wire should be used when wiring the junction box GREEN WIRE INSIDE BOX 14 2WG COPPER GROUND ATTACHED TO GRN SCREW WITH GRN WIRE BLK WHT WHT BLK HEAT SHIELD Junction Box Installation If the box is being wired from the OUTSIDE of the appliance Install the Romex connector not included with appliance in the side wrap Loosen two screws on the Romex connector feed t...

Page 18: ...an Installation Fan should be positioned on the left side as viewed from appliance interior side See Figure 6 3 NOTE For ease of installation it is recommended that the fan be installed prior to gas line installation Wall Switch Position the wall switch in the desired position on a wall Run a maximum of 25 feet 7 8 m or less length of 18 A W G minimum wire and connect it to the appliance ON OFF sw...

Page 19: ...sformer Remove batteries before using the transformer and unplug the transformer before installing the batteries Battery polarity must be correct or module damage will occur Figure 6 4 Intellifire Pilot Ignition IPI Wiring Diagram NOTE 1 Ignition module valve pilot and wall switch operate on 3 volts Uninterrupted 120 VAC is required at junction box unless equipped with battery back up IGNITION MOD...

Page 20: ...ox connect the black hot wire and red switch leg wire to the wall switch as shown At the appliance connect the black hot white neutral and green ground wires to the junction box as shown Add a 1 4 in insulated female connector to the red switch leg wire route it through the knockout in the face of the junction box and connect to the top fan switch connector 1 4 in male as shown Red Switch Switch B...

Page 21: ...re are no ignition sources such as sparks or open flames Light the appliance It will take a short time for air to purge from lines When purging is complete the appliance will light and operate normally WARNING Risk of Fire Explosion or Asphyxiation Check all fittings and connections with a non corrosive commercially available leak check solution DO NOT use open flame Fittings and connections could...

Page 22: ...000 feet elevation In the USA Reduce burner orifice 4 for each 1000 feet above 2000 feet In CANADA Reduce burner orifice 10 for elevations between 2000 feet and 4500 feet Above 4500 feet consult local gas utility E Air Shutter Setting Air shutter settings should be adjusted by a qualified ser vice technician at the time of installation The air shutter is set at the factory NOTICE If sooting occurs...

Page 23: ...TOP VIEW FIREPLACE HOOD 1 2 IN Note Measurements are in inches Figure 8 1 Clearances to a Combustible and or Non combustible Indoor Mantel Figure 8 2 Clearances to a Combustible and or Non combustible Indoor Mantel or Mantel Leg 3 4 IN 3 4 IN 5 8 IN Figure 8 3 Decorative Front Overlaps Surround The TWI MOD decorative front will overlap the appliance See Figure 8 3 12 11 10 9 8 7 6 13 5 8 12 5 8 11...

Page 24: ...alled Off the Floor FS TWI Decorative Front Application If the appliance is installed on the floor or level with an elevated hearth the FS TWI decorative front MUST be used The TWI MOD decorative front is not compatible with this type of installation as a minimum elevation of 3 4 inch is required on the bottom of the appliance TWI MOD Decorative Front Application If the appliance is installed at a...

Page 25: ...ual 2369 970 Rev L 8 19 DECORATIVE FRONT DIMENSION DIAGRAM TWI MOD A B F E H G D C I BOTTOM OF APPLIANCE A B C D E F G H I TWI MOD in 37 43 3 8 30 3 4 20 3 8 33 38 3 4 6 3 8 2 3 8 1 2 mm 940 1102 781 518 838 984 162 6 13 Figure 8 6 Decorative Front Dimensions TWI MOD Decorative Front ...

Page 26: ...WILIGHT II MDC Installation Manual 2369 970 Rev L 8 19 26 Figure 8 7 Decorative Front Dimensions FS TWI Decorative Front DECORATIVE FRONT DIMENSION DIAGRAM FS TWI A C B D E A B C D E FS TWI in 36 1 16 31 1 8 31 3 4 25 7 8 1 3 4 mm 916 790 806 657 32 ...

Page 27: ...re Risk Finish all edges and fronts to clearances and specifications listed in manual Black metal columns may be covered with non combustible material only Do NOT overlap combustible materials onto appliance front Install combustible materials only up to specified clearances on top front and side edges Seal joints between the finished wall and appliance top and sides using only a 300 ºF minimum se...

Page 28: ...nch Thick or Less Finishing materials 1 inch maximum thick Stop finishing material flush with opening Finishing Material 1 Inch Thick or Less Overlap Fit Method The TWI MOD decorative front can be installed with finishing materials up to one inch thick DECORATIVE FRONT 1 in MAX FINISHING MATERIAL TOP EDGE NON COMBUSTIBLE FINISHING MATERIAL ...

Page 29: ...IANCE FRONT SEAL GAPS WITH NON COMBUSTIBLE CAULK 6 in MAXMUM PROJECTION FROM FACE OF FIREPLACE BRICK LEDGE NON COMBUSTIBLE SHEATHING SUPPLIED COMBUSTIBLE SHEATHING HOUSEWRAP REQUIRED FLASHING SUPPLIED HOUSE WRAP EXHAUST Figure 8 12 Exterior View NOTE All finishing materials on top of exterior sheathing must be non combustible for a minimum of 10 7 8 inches above and on both sides of the exterior f...

Page 30: ... 12 in MINIMUM CLEARANCE TO NON VINYL SIDING 36 in MINIMUM CLEARANCE TO VINYL SIDING DRAIN PLANE DETERMINED BY LOCAL CODE BRICK OR OTHER NON COMBUSTIBLE FACING MATERIAL 6 INCH MAXIMUM PROJECTION FROM SURFACE OF FIREPLACE INCLUDES NON COMBUSTIBLE MANTEL PROJECTION NON COMBUSTIBLE BRICK LEDGE MUST BE TIGHT TO APPLIANCE FACE OR NON COMBUSTIBLE SHEATHING TOP OF HOOD INSULATION SEAL GAPS WITH NON COMBU...

Page 31: ...te assembly 9 2 Glass Assembly Interior Side GLASS RETAINER BRACKET WING NUT ON THREADED STUD Removing Fixed Glass Assembly Interior Loosen two wing nuts on bottom glass retainer bracket Loosen and remove two wing nuts on top glass retainer bracket Remove glass retainer bracket See Figure 9 1 Lift glass assembly off of glass retainer bracket Replacing Fixed Glass Assembly Interior Position glass a...

Page 32: ...ory so that the smooth re flective side is facing the inside or viewing area of the fireplace USE SLOTS TO SLIDE REFRACTORY INTO POSITION Figure 9 5 Install Refractory GLASS LATCH Removing Fixed Glass Assembly Exterior Remove vanity panel from appliance to expose glass latches Pull glass latch out to release Grasp glass assembly on sides and pull bottom toward you Slide glass assembly down and out...

Page 33: ...ea by the glass refractory This area must remain open for proper air flow See Figure 9 6 Figure 9 6 No Glass Rock Media in Gap NOTICE Care should be taken to avoid placing glass rock media between the left and right of the media tray and the firebox Blocking this gap may cause an undesirable flame appearance See Figure 9 6 NO MEDIA IN SHADED AREA BOTH LEFT AND RIGHT SIDE WARNING Risk of explosion ...

Page 34: ...ccessories WARNING Risk of Fire and Electric Shock Use ONLY Hearth Home Technologies approved optional acces sories with this appliance Using non listed accessories could result in a safety hazard and will void the warranty Decorative Doors and Fronts WARNING Risk of Fire Install ONLY doors or fronts approved by Hearth Home Technologies Unapproved doors or fronts may cause fireplace to overheat Th...

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