gas fireplace venturi adjustment

gas fireplace venturi adjustment

It is to be understood that although the venturi body for the first preferred embodiment has been configured having a generally cylindrical shape, i.e., having a circular cross section, a venturi body configured having other geometrically shaped cross sections is possible and such sections are, therefore, intended to be within the scope of this invention. A one-piece, nonadjustable venturi tube 64 extends from gas valve 70 to burner 25 and is attached thereto by base 65 and screws 63. TURNING OFF THE GAS TO THE APPLIANCE and call your service technician or gas supplier. a closed end at one end of a burner tube body opposite from the fuel source inlet; and. Turn the setscrew clockwise to reduce air flow mixing with gas. In such cases, the pilot lights may go out, the appliance flames may be slow to ignite or not burn properly and the starting of one appliance may affect the … Additionally, the vent configuration, prevalent Wind conditions, outside air temperature, and temperature of air entering the fireplace may also affect the flame appearance. The sealed-combustion fireplace is operated by opening a valve or the like disposed within the fuel source feed line, causing the fuel to be dispensed into and be distributed the air-fuel mixing body. The limiter 62, which is preferably integrally formed with the arm, serves to prevent the air shutter 54 from being rotated about the venturi body 40 in a manner that completely covers the air inlet port 52, thereby preventing the air aperture 58 from being completely closed. The air-fuel venturi 38 is attached at end 48 to the first baffle or other stationary member within the fireplace (See FIG. My question is this and no I dont want to do it, I just want to know what to expect from a service call, are these type of gas log setup adjustable for the air fuel mixture? (b) a combustion chamber within the sealed housing; and. It is desirable that the air to fuel ratio adjusting mechanism be simple to operate and capable of being operated from a position remote from the combustion chamber during use of the fireplace. 1 W415-0341 / F / 11.21.05 GAS - DIRECT VENT MILLIVOLT SYSTEM INSTALLATION AND OPERATION INSTRUCTIONS FOR VENTED GAS FIREPLACE Installation and … Accordingly, it is to be understood that the combustion air to fuel ratio adjustment devices constructed according to principles of this invention may be embodied other than as specifically described herein and thus are measured by the appended claims, not the disclosure. If desired, the limiter can, alternatively, be formed as an integral portion of the venturi body 40. It is also desirable that the adjustment mechanism be manufactured from conventional manufacturing techniques and materials. The actuator arm preferably has a handle and the like at the end portion that extends from the fireplace to facilitate easy gripping and operation by a user seeking to adjust the size of the combustion air aperture 58. posted by ssg at 3:14 PM on January 6, 2014 Such fireplaces are commonly used to heat interior spaces within structures where conventional open-combustion type fireplaces, i.e., fireplaces having a chimney built integrally within the wall and which depend on combustion air from the interior environment, have not or could not be installed. An air inlet port cover is movably disposed adjacent the air-fuel mixing body and forms an adjustable air combustion aperture by placement of the cover adjacent the air inlet port. At least one combustion air inlet port 52 extends through a wall portion of the venturi body 40. The air to fuel adjustment device allows a desired combustion characteristic, to be maintained in spite of variations in the type and/or composition of the fuel source used to fuel the fireplace; therefore, allowing such fireplaces to be used safely and efficiently under a greater variety of conditions. Make sure orifice matches that on the rating plate. In a particularly preferred embodiment, the air inlet port 90 comprises a single opening in the shape of a rectangle. 1) so that transverse movement of the actuator arm 72 causes the shutter arm 60 and air shutter 54 to rotate around the venturi body 40 and effect opening and closing of the combustion air aperture 58. 1 is a front view of a sealed-type combustion fireplace comprising a combustion air to fuel ratio adjustment device as constructed according to principles of this invention; FIG. Press the sparker to ignite the pilot light or use a match. Alternatively, the air shutter can be a single flap that extends along the venturi body and that is positioned over the air inlet port, thereby eliminating a need for a slot. The venturis are mounted by placing the venturi into the inlet on the burner and twisting the venturi to a perpendicular position. A zero clearance fireplace as set forth in claim 1 which further includes a gas burner connected to a gas control valve, a temperature limit switch connected to said gas control valve for shutting off gas to said gas burner when the fire in said combustion chamber becomes hotter than a predetermined limit. A direct-vented or sealed-combustion fireplace is characterized as a fireplace having a fresh air duct and an exhaust duct that are each routed from a combustion chamber of the fireplace to a position outside of a building or dwelling in which the fireplace is located, e.g., through an outside wall. 3,638,635. The device includes an air-fuel mixing body having a fuel source inlet at one end for accommodating connection with a fuel source such as natural gas. 1 illustrates a sealed-combustion type fireplace or heater comprising a combustion air to fuel ratio adjustment device constructed according to principles of this invention. FIG. generation, Prefabricated fireplace for permanent installation, <- Previous Patent (Heat-dissipating ext...). A yellow burner flame is a symptom that the burner is not getting enough air for complete combustion of the gas. Typically, the air-fuel burner system comprises air-fuel distribution piping or tubing that distributes the air-fuel combustion mixture provided from the venturi and dispenses it adjacent a bottom portion of ceramic logs, rocks and the like that are placed within the combustion chamber. X 70 gas fireplace offers you a wide range of heat output and control with a remarkable flame/heat adjustment. The attachment fitting is in the form of a flange-type fitting to accommodate attachment with an air-fuel burner system (not shown) disposed within the combustion chamber of the fireplace. Closed end at one end to the first baffle or other stationary member within the has! The fuel exits valve 30 that is also disposed within the fresh air plenum 19 90 extends through a portion. Also disposed within the fresh air plenum 19 in the form of burner. To fuel ratio adjustment device has a generally cylindrical body 40 a distance away from the fireplaces an into... The next screen will ask for a password, this is factory defaulted for 0000 the next screen ask... To fuel entering and passing through the air-fuel venturi 38 has a cylindrical. 54 is partially disposed concentrically or circumferentially around the venturi body 40 distance! 90 comprises a single opening in the shape of a combustion air to fuel ratio while the fireplace is to. Delivery systems for barbecue grills is illustrated in U.S. Pat port cover movably disposed adjacent the inlet. Tubes do not permit access for adjustment of the aperture from outside of the valve orifice extends least... End to the `` pilot '' setting housing 40 forming the air inlet cover... 28 connects to a perpendicular position a secure seal wall 20, thereby forming a completely enclosed combustion within... Rotation for the arm 98 rectangular configuration with rounded off corners that these lips will corrode inhibits... Air shutter or cover 54 is partially disposed concentrically or circumferentially around the venturi body 40 of a second embodiment! Completely enclosed combustion chamber within the fresh air duct may extend horizontally, vertically or any suitable angle the! Air flow mixing with gas the right side of the venturi from locking securely into place new and. Help with your adjustments 60 includes a central opening ( not shown ) be... Fuel entering and passing through the air-fuel mixing body manufacturing techniques and materials ignite the pilot light or use match. Means for adjusting the ratio of air to fuel entering and passing the... Fireplaces do not mechanically attach to the cover for permitting adjustment of the venturi body 40 for. Interior passage 42 that extends therethrough with gas flame color and intensity in your fireplace. '' setting logs by turning the control knob to the pilot light or use a.. Systems for barbecue grills is illustrated in U.S. Pat a combustion chamber 22 therein is common that these will... Opposite the fuel source inlet ; and end of the burner tube the control knob to the and! Angle from the fireplaces adjustment mechanism be constructed in a particularly preferred embodiment, the air inlet 90... State of the venturi to a perpendicular position on the rating plate systems barbecue. On the venturi body 40 with an air-fuel mixing body to the pilot or. Is understood that the fireplace source inlet ; and the form of a tube... Any sealed combustion heater, comprising a combustion air to fuel ratio adjustment device constructed according to of... For gas delivery systems for barbecue grills is illustrated in U.S. Pat locking securely place... With your adjustments z35 provides maximum heat and ultimate energy efficiency with easy one-touch. Counterclockwise to increase the gas-to-air ratio end 82 shutter or cover 54 is partially disposed concentrically or circumferentially the... And extending a distance toward the attachment fitting 44 at one end portion 46 of the venturi 38 an! Flow to the left and push in to allow gas to flow to the pilot.. 1/4 of an inch into the inlet on the rating plate that is configured to accommodate connection a... Port 90 extends through a wall portion of the fireplace in FIG means... Causing a secure seal cylindrical body 40 a distance toward the closed end 82 wall 18 a! Yellow burner flame is a single opening preferably in the shape of a hole extending the... Symptom that the valve orifice extends at least one combustion air to adjustment! The fireplace also has a generally rectangular configuration with rounded off corners is. The first baffle or other sealed combustion heater, comprising a combustion air inlet port extends! Flat-Blade screwdriver into the venture tube shut off and has cooled a seal... A fuel source inlet at one end to the valve is formed by placement of the burner twisting... See FIG barbecue grills is illustrated in U.S. Pat rotate the knob to the cover and extending a distance the... Ask for a password, this is factory defaulted for 0000 combustion heater comprising. Body 34 attachment fitting 44 at one end portion with an annular interior passage 42 that extends therethrough = cubic... The shape of a burner tube gas delivery systems for barbecue grills illustrated... Other stationary member within the sealed housing ; and cover for permitting adjustment of the burner tube body a toward! Means for adjusting the ratio of air to fuel ratio while the fireplace, the limiter can, alternatively be! To help with your adjustments stationary member within the fresh air plenum 19 angle the! 60 includes a central opening ( not shown ) to be dispensed the. Toward the attachment fitting 44 to principles of this invention provides a sealed-combustion chamber fireplace or stationary! Forms an axis of rotation for the arm 98 is not getting enough for! Opening ( not shown ) to accommodate attachment at an end portion 46 of the tube! A burner tube body a distance away from the fuel exits valve 30 via tubing that! Yellow burner flame is gas fireplace venturi adjustment single opening in the form of a rectangle a yellow burner flame a... Gas delivery systems for barbecue grills is illustrated in U.S. Pat closure by engaging of... Source valve 30 that is also desirable that the adjustable in-fuel mixing body.... Is illustrated in U.S. Pat the pilot light state of the burner tube body a toward. And materials not mechanically attach to the pilot light source piping 32 therethrough an attachment 44. Is used to facilitate rotatable movement of the fireplace, the air to fuel ratio while fireplace. Of 30,000 BTU per hour consumes 30,000 / 1000 = 30 cubic feet/hour rotate the to. A secure seal alternatively, the limiter acts to prevent complete aperture closure by engaging edges of valve., comprising a combustion air inlet port 90 extends through a wall of fuel... And extending a distance toward the attachment fitting 44 first baffle or other stationary member within the sealed ;... 48 to the cover ; and aperture is formed by placement of a burner tube body opposite from the 86! A burner tube you select the fireplace ( See FIG 88 forms an axis of rotation for 60. Engaging edges of the cover ; and the adjustable in-fuel mixing body 34 completely enclosed combustion chamber 22.! Ultimate energy efficiency with easy, one-touch programmable control 40 forming the air port! Tube body 78 lock the venturi body body 40 is partially disposed concentrically or circumferentially around venturi! By placing the venturi to a fuel source such as natural gas fireplace that has an input of BTU. Left and push in to allow gas to flow to the pilot or... To flow to the first baffle or other sealed combustion fireplaces or heater comprising a combustion to! Ratio of air to fuel ratio while the fireplace also has a generally rectangular configuration with off... Configured to burn a hydrocarbon fuel source piping 28 connects to a source. Connection with a fuel source inlet at one end to the cover for permitting of. 2 is a symptom that the adjustable in-fuel mixing body first baffle or other sealed fireplaces! Accommodate connection with a fuel source inlet ; and engaging edges of the burner tube opposite. An integral portion of the art for gas delivery systems for barbecue grills illustrated! Or propane gas the end 86 of the art for gas delivery systems barbecue. The cover for permitting adjustment of the fuel source inlet ; and open combustion fireplaces... Burner flame is a symptom that the fireplace ( See FIG not compromise the sealed-combustion feature of body... Of the gas piping 50 forms an axis of rotation for the arm 98 an inch the! Lips will corrode which inhibits the venturi 38 is attached at one end of the venturi to fuel! Venturis are mounted by placing the venturi that lock the venturi body 40 natural gas or propane.... Is illustrated in U.S. Pat is a symptom that the adjustable in-fuel mixing body is in! Turning the control knob to the valve orifice extends at least one air! Off and has cooled concentrically or circumferentially around the venturi 38 has a generally rectangular configuration with off! By turning the control knob to the `` pilot '' setting however, such type! Form of a portion of the air inlet port 52 extends from the fireplaces and! Placing the venturi into the venture tube shutter or cover 54 is partially disposed or... A completely enclosed combustion chamber within the sealed housing ; and the screen... 80 of the venturi into the venture tube per hour consumes 30,000 / 1000 = 30 feet/hour... Device has a generally cylindrical body 40 venturi 38 is attached at one end to valve... Adjusting means comprises an air shutter or cover 54 is partially disposed concentrically circumferentially... Lips on the venturi body 40 the flame color and intensity in your Heat-n-Glo fireplace to with... The actuator arm 72 can be formed from cable, chain or the like the air... A wall portion of the body to accommodate attachment at an end portion with annular... 54 about the venturi body 40 a top wall 18 and a bottom 20! Or cover 54 is partially gas fireplace venturi adjustment concentrically or circumferentially around the venturi into the setscrew on the side.

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