In this embodiment, an air shutter arm or cover arm 98 has a limiter 100 and an attachment fitting 102, and an actuator arm 104 has an air-tight fitting 106 which all connect and function in the same manner as that described above and illustrated in FIG. 3 illustrates a second preferred embodiment of a combustion air to fuel ratio adjustment device constructed according to principles of this invention for use with a sealed-combustion chamber fireplace. The air-fuel venturi 38 is attached at end 48 to the first baffle or other stationary member within the fireplace (See FIG. 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. In a first preferred embodiment, the air inlet port 52 is a single opening preferably in the shape of a rectangle. Sealed-combustion type fireplaces incorporating devices that allow a user to adjust the proportion of combustion air to fuel ratio to effect the adjustment of the flame within the fireplace are known. The burner tube 76 has a generally cylindrical body 78 and an annular interior passageway 80 that extends therethrough. 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. If desired, the limiter can, alternatively, be formed as an integral portion of the venturi body 40. The air shutter 54 has an open or slotted portion 56 that is of the same or smaller dimension as that of the air inlet port 52. At least one combustion air inlet port 52 extends through a wall portion of the venturi body 40. During the operation of a sealed-combustion type fireplace it is desired that the flame produced as a result of combustion of the air-fuel mixture be similar in appearance to the flame produced in a conventional wood-burning fireplace. The venturi 38 has a generally cylindrical body 40 with an annular interior passage 42 that extends therethrough. 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. Gas burners burn blue if the ratio of fuel to air is correct. posted by ssg at 3:14 PM on January 6, 2014 These and other aspects and advantages of the present invention will become appreciated as the same becomes better understood with reference to the specification, claims and drawings wherein: FIG. Privacy Policy Alternatively, the actuator arm 72 can be formed from cable, chain or the like. The venturis are mounted by placing the venturi into the inlet on the burner and twisting the venturi to a perpendicular position. Natural gas doesn't produce soot - this was probably a conversion from a wood-burning fireplace. (b) a combustion chamber within the sealed housing; (c) an air to fuel adjustment device comprising: (i) an air-fuel mixing body within the sealed housing having an annular passage extending therethrough, the mixture body comprising: a fuel source inlet at one end of the body to accommodate connection with a fuel source; and at least one combustion air inlet port disposed through a wall portion of the body, wherein the air inlet port is positioned adjacent the fuel source inlet; and, (ii) an air inlet port cover disposed concentrically around an outside surface of the air-fuel mixing body adjacent the air inlet port and movable with respect to the body, wherein placement of the cover over and with respect to the air inlet defines a combustion air aperture, wherein movement of the cover around the body in one direction increases the size of the air aperture, and movement of the cover around the body in an opposite direction decreases the size of the air aperture; and. The fuel source valve 30 can be of conventional design and operable either manually or electrically, and can also include an ignitor or pilot system for effecting combustion of the air-fuel mixture to provide the fireplace flame. Primary air from the fresh air plenum is allowed to enter the burner tube via one or more openings in the mixing body or in an air-fuel burner system connected to the mixing body. A sealed-combustion chamber fireplace includes a combustion air to fuel adjustment device comprising an primary air-fuel mixing body having a fuel source inlet at one end and at least one combustion air inlet port disposed through a wall portion of the body. The burner tube 78 is different from the venturi embodiment of the invention in that the burner tube does not require connection with a separate air-fuel burner system because the burner tube serves to both create a combustion air-fuel mixture of desired proportion and distribute the air-fuel mixture for combustion within the combustion chamber. The exhaust gases produced as a result of the combustion rise from the combustion chamber and are routed within the fireplace to the exhaust gas plenum duct and out the exhaust gas duct. venturi tube for proper primary air adjustment. If the price of natural gas is .35 cents ($0.0035) per cubic foot then 30 cubic feet x … (iii) means, outside of the sealed housing, for operating the air adjusting means by a user during operation of the fireplace. In a particularly preferred embodiment, the shutter arm has a generally rectangular configuration with rounded off corners. A sealed-combustion chamber fireplace includes a combustion air to fuel adjustment device comprising an primary air-fuel mixing body having a fuel source inlet at one end and at least one combustion air inlet port disposed through a wall portion of the body. Natural gas fireplace fireplaces, however, are designed to operate with a yellow or orange flame in order to achieve a more realistic appearance. It is understood that the fresh air duct may extend horizontally, vertically or any suitable angle from the fireplaces. A preferred adjusting means comprises an air inlet port cover movably disposed adjacent the air-fuel mixing body. TURNING OFF THE GAS TO THE APPLIANCE and call your service technician or gas supplier. CERTIFIED UNDER CANADIAN AND AMERICAN NATIONAL STANDARDS: ANSI Z21.88 • CSA 2.33 FOR VENTED GAS FIREPLACE HEATERS. 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? 2 for the first preferred embodiment, i.e., to facilitate adjustment of the combustion air aperture 96 from a position outside of the fireplace. a closed end opposite the fuel source inlet; and. Look inside lower end of venturi tubes for insect nests, cobwebs, or wasp mud, To remove insect nests, cobwebs or wasp mud, use an accessory flexible venturi brush or bend a small hook on one end of a 20 inch long flexible length of wire, Use the brush or wire to remove the obstructions from the venture tubes, Return the burner assembly into the grill, Make sure valve orifices are inside venturi tubes. The air inlet port 90 extends from the end 86 of the burner tube body a distance toward the closed end 82. In a particularly preferred embodiment, the openings are positioned along a topmost portion of the burner tube body 78 to facilitate dispensement of an air-fuel combustion mixture onto a ceramic log (not shown) and the like that is placed on top of the burner tube. a plurality of openings extending through a wall portion of the burner tube, wherein mixed combustion air and fuel is dispensed from the burner tube through the openings and is combusted to form a flame within the combustion chamber. 2 is a perspective view of a first preferred embodiment of a combustion air to fuel ratio adjustment device; and. Accordingly, the burner tube constructed according to principles of this invention allows a user to adjust the combustion air to fuel ratio in a sealed-combustion type fireplace during operation of the fireplace from a position outside of the fireplace to provide a desired flame appearance. The adjustment device has a means for adjusting the ratio of air to fuel entering and passing through the air-fuel mixing body. The shutter includes a limiter 62 that extends from an end portion 64 of the shutter arm adjacent the venturi body 40 a predetermined distance into the air inlet port 52. It is to be understood that the venturi 38 may comprise more than one air inlet port, and may comprise an air-inlet port that is configured having a geometric shape other than a rectangle. No. Venturi Adjustment 14-15 REPLACEMENTS Ordering Replacement Parts Replacement Parts Accessories Vent Kits Terminal Kits 16-17 TROUBLE SHOOTING GUIDE 3 WS-415-63 / 11.24.98 NAPOLEON gas fireplace… The fuel exits valve 30 via tubing 32 that is configured to accommodate attachment at an end portion with an air-fuel mixing body 34. The combustion air mixes with the fuel to form a combustible mixture that is ignited by an ignition source to form a flame that projects from the air-fuel burner system into the fireplace via openings in the burner system. The air-fuel mixing body is configured having a fuel source inlet to accommodate connection with and accept fuel output from a fuel source feed line. At that point there are two small metal lips on the venturi that lock the venturi into place causing a secure seal. X 70 gas fireplace offers you a wide range of heat output and control with a remarkable flame/heat adjustment. An exhaust gas plenum 27 extends from a top portion of the combustion chamber 22 and is connected to an exhaust gas duct 29 that also passes through the interior wall of the home or structure to facilitate the passage of combustion gases from the fireplace to the outdoor environment. Adjustment of the combustion air to fuel ratio of the air-fuel mixture combusted in the fireplace is achieved by opening and closing the air aperture. In this manner the exhaust gases produced by the combustion within the fireplace are swept from the fireplace to the outside environment and, therefore, are prevented from entering the room where the fireplace is located. The mixing body 34 is constructed according to principles of this invention having an adjustable combustion air aperture 36 formed therein as described in greater detail below. The device allows the user to adjust the flame appearance quickly, without having to shut the fireplace off and wait for the fireplace to cool before making such adjustment. SEE PAGE 16. Using silica sand in a propane fireplace can limit the amount of propane that rises to the surface and decrease the size of the flames. Piping 50 forms an axis of rotation for arm 60. (b) a combustion chamber within the sealed housing; and. The device comprises an air-fuel mixing body 76 in the form of a burner tube. Once a Fireplace is located, the factory name of NAP_FPC_#### will appear (Each Bluetooth has a unique name which will be seen in the last four digits in the factory name, ex NAP_FPC_A1B2). In a particularly preferred embodiment, the fitting 68 is in the form of a hole extending through the shutter arm. The burner tube 76 includes a fuel source inlet (not shown) at an end 86 of the burner tube body 78 opposite from the closed end 82 to accommodate connection with fuel source piping 32, thereby allowing fuel routed from the fuel source valve (see FIG. Although only two embodiments of the combustion air to fuel ratio adjustment device for a sealed-combustion type fireplace or heater have been described herein, many modifications and variations will be apparent to those skilled in the art. at least one combustion air inlet port disposed through a wall portion of the body, wherein the air inlet port is positioned adjacent the fuel source inlet; (iii) means attached to the cover for permitting adjustments of the aperture from outside of the sealed housing. 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. It is desirable that the adjustment mechanism be constructed in a manner that does not compromise the sealed-combustion feature of the fireplace. The gas fireplace must be installed by a licenced, authorized service technician or contractor. In a conventional sealed-combustion fireplace, the part of combustion air (primary air) entering the fireplace via the fresh air plenum is mixed with the fuel source within an air-fuel mixing body such as a venturi or burner tube disposed within the combustion chamber of the fireplace. The fireplace 10 comprises four vertical walls comprising two side walls 12 and 14, a back wall 16, and a front wall (not shown), wherein the front wall is formed from a sheet of glass. Make sure orifice matches that on the rating plate. Designed for new construction and renovation projects, the z35 provides maximum heat and ultimate energy efficiency with easy, one-touch programmable control. 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. (iii) means attached to the cover for permitting adjustment of the aperture from outside of the sealed housing. A yellow burner flame is a symptom that the burner is not getting enough air for complete combustion of the gas. The actuator arm 72 can be formed from a length of metal rod and the like that extends through a wall portion of the fireplace into a room to facilitate movement of the air shutter 54, i.e., adjustment of the combustion air aperture 58, from a position outside of the fireplace. Find replacement parts for your gas grill now! The shutter arm 60 includes a central opening (not shown) to accommodate placement of the fuel source piping 32 therethrough. Additionally, the vent configuration, prevalent Wind conditions, outside air temperature, and temperature of air entering the fireplace may also affect the flame appearance. 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. an actuator lever that is movably attached to an opposite end of the arm, wherein the lever passes through a wall portion of the fireplace to a position outside of the sealed housing. The limiter acts to prevent complete aperture closure by engaging edges of the housing 40 forming the air inlet port 52. The ability to adjust the air to fuel ratio during operation of the fireplace permits a user to adjust and maintain a flame appearance to simulate a flame produced by the combustion of wood, rather than a hydrocarbon fuel source, in light of variations in fuel source composition and/or types. In a particularly preferred embodiment, the air inlet port 90 comprises a single opening in the shape of a rectangle. The fireplace also has a top wall 18 and a bottom wall 20, thereby forming a completely enclosed combustion chamber 22 therein. Lots of black soot indicates inefficient gas burning. Means are also provided for actuating the adjusting means by a user during operation of the fireplace from a position outside of the sealed combustion chamber. Once you select the fireplace, the next screen will ask for a password, this is factory defaulted for 0000. Natural gas regulators may require adjustment as a result of changes in the system or incorrect adjustment by service personnel. The venturi 38 includes a fuel source inlet (not shown) at an opposite end 48 of the venturi body 40 to accommodate connection with fuel source piping 50. Turn the setscrew clockwise to reduce air flow mixing with gas. © 2004-2021 FreePatentsOnline.com. Example: A natural gas fireplace that has an input of 30,000 BTU per hour consumes 30,000 / 1000 = 30 cubic feet/hour. At least one combustion air inlet port 90 extends through a wall portion of the burner tube body 78. Superior Fireplace Company (Fullerton, CA), 126/92R, 431/354, 126/512, 126/92R, 126/92AC, 126/85B, 126/92B, 431/354, 431/188, 431/125, 431/126, 431/355, CHRISTIE PARKER AND HALE (PASADENA, CA, US), Click for automatic bibliography Insert a flat-blade screwdriver into the setscrew on the right side of the valve and twist counterclockwise to increase the gas-to-air ratio. Heat output and flame heights are variable, allowing you… The burner tube 76 is attached at end 86 to a stationary member within the fireplace such as a baffle so that transverse movement of the actuator arm 104 by a user causes the shutter arm 98 and air shutter 92 to rotate around the burner tube body 78 and effect the opening and closing of the combustion air aperture 96. An air shutter or cover 54 is partially disposed concentrically or circumferentially around the venturi body 40 at end 48. 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. 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. The shutter 92 is slidably disposed around the body 78 so that rotation of the air shutter in one direction decreases the size of a combustion air aperture 96, formed by the position of the air shutter over the air inlet port, and rotation in an opposite direction increases the size of the aperture 96. (b) A combustion chamber within the housing; (c) a combustion air to fuel ratio adjustment device including: (i) an air-fuel mixing body within the sealed housing having a fuel source inlet at one end, and at least one combustion air inlet port extending through a wall portion of the body; (ii) an air inlet port cover disposed concentrically around an outside surface of the air-fuel mixing body, wherein a combustion air aperture is defined by a position of the cover over the inlet port, and wherein movement of the cover relative to the inlet port effects closing and opening of the aperture; and. The fuel source piping 28 connects to a fuel source valve 30 that is also disposed within the fresh air plenum 19. Open air shutter. & Terms of Use. The state of the art for gas delivery systems for barbecue grills is illustrated in U.S. Pat. The actuator arm 72 extends through an air-tight fitting 74 placed within the fireplace wall that ensures that indoor air does not enter the fresh air plenum of the fireplace. The Tofino Series of gas fireplaces offers you the highest level of quality, technical innovation, and performance for your home. This permits adjustment of the flame appearance i.e., flame color and height, a characteristic important in gas fireplaces, as well as combustion characteristics. 1) to be dispensed within the interior passage 80 of the burner tube. Make sure outlet (manifold) pressure is … After an adjustment has been made, the effect of the change cannot be seen until the unit has been in operation for about 15 to 30 minutes. Natural gas, when combusting poorly, can most certainly produce soot. a fuel source inlet at one end of the body to accommodate connection with a fuel source; and. CAUTION: Before beginning Installation, shut off gas at cylinder, and disconnect any electric current. Be sure that the valve orifice extends at least 1/4 of an inch into the venture tube. The burner tube has a closed end 82 at one end of the body 78 and a plurality of openings 84 that extend through a wall portion of the body. The fuel is routed into a portion of the fresh air plenum 19 positioned between the bottom wall 20 and the first baffle 24 via flexible or hard piping 28. Rotate the knob to the left and push in to allow gas to flow to the pilot light. It is common that these lips will corrode which inhibits the venturi from locking securely into place. (iii) means, outside of the sealed housing, for operating the air adjusting means by a user during operation of the heater. An air shutter arm or cover arm 60 is attached at one end to the air shutter 54 and is positioned adjacent the end 48 of the venturi body 40. FIG. This invention provides a sealed-combustion chamber fireplace or other sealed combustion heater, comprising a combustion air to fuel adjustment device. & Terms of Use. The fireplace includes a fresh air plenum 19 that is formed between the bottom and side walls 20 and 12 and a first and second baffle 24 and 26. Increase primary air. REQUIRED TOOLS: Measuring tape, flat head screw driver, adjustable wrench, or pliers NOTE: Several types of single and dual control replacement burners and venturis for grill models with either in-post or up-front controls are available. 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. It is desired that the first and second preferred embodiments of the combustion air to fuel ratio adjustment device be formed from a structurally strong and fire resistant material such as steel or steel alloy. Rather, they only permit adjustment after the fireplace has been shut off and has cooled. This allows for more efficient use of fireplaces. Privacy Policy a arm attached at one end to the cover and extending a distance away from the cover; and. That is, the number, size and shape of plenum in the fireplace or heater may vary as desired as well as the size, shape and direction of exhaust and fresh air ducts. 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. generation, Prefabricated fireplace for permanent installation, <- Previous Patent (Heat-dissipating ext...). The present invention relates generally to a sealed-combustion type fireplace and other heaters and, more particularly, to a sealed-combustion type fireplace comprising a combustion air to fuel ratio adjustment device. a number of openings disposed through a wall portion of the burner tube body, wherein mixed combustion air and fuel is distributed through the burner tube and dispensed from the tube via the openings for combustion to form a flame within the combustion chamber. 1 is provided for purposes of reference and illustration only and is, therefore, not intended to limit the application of the air to fuel ratio adjustment mechanism to any particular type of sealed combustion fireplace or heater. GDS28N & GS28N NATURAL GAS GDS28P & GS28P PROPANE Model GS28 GDS28N & GS28N NATURAL GAS GDS28P & GS28P PROPANE Model GS28 is made up of Model GDS28 and B-Vent Adapter Kit GS-150KT CERTIFIED FOR CANADA AND UNITED … An adjustable air combustion aperture is formed by placement of a portion of the cover adjacent the air inlet port. The ability to adjust the flame appearance during operation of the fireplace from a position outside of the fireplace also permits safe adjustment of the flame appearance, because such adjustment is made without having to contact a hot fireplace member. The shutter arm 60 has an end portion 66 opposite from end portion 64 that includes ,a fitting 68 to accommodate movable attachment with an end portion 70 of an actuator arm 72. The air-fuel mixture body may be an air-fuel venturi to effect mixing of the air-fuel mixture and transportation of the mixture to an air-fuel burner system for dispensement, or may be a burner tube to effect both the mixing of the air-fuel mixture and dispensement of the combustion mixture for combustion within the fireplace. 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. 3,638,635. 1 W415-0341 / F / 11.21.05 GAS - DIRECT VENT MILLIVOLT SYSTEM INSTALLATION AND OPERATION INSTRUCTIONS FOR VENTED GAS FIREPLACE Installation and … The venturi 38 includes an attachment fitting 44 at one end portion 46 of the venturi body 40. Accordingly, sealed-combustion fireplaces have the advantage of heating an interior space, i.e., a room, by thermal convection and radiation without emitting combustion product gases into the interior space and without requiring the use of room air that has been heated. a number of openings disposed through a wall portion of the burner tube body, wherein mixed combustion air and fuel is distributed through the burner tube and dispensed from the tube via the openings for combustion to form a flame within the fireplace. Have a gas log fireplace, 20 years old and has never been serviced. an actuator lever that is movably attached to an opposite end of the arm, wherein the lever passes through a wall portion of the sealed housing to a position outside of the sealed housing. Combustion air needed to burn fuel is routed from the fresh air duct to the combustion chamber by a fresh air plenum inside of the fireplace. 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. It is, therefore, desirable that a sealed-combustion type fireplace include a mechanism for adjustment of the combustion air to fuel ratio during use, thereby allowing a user to adjust the flame resulting from combustion of such air to fuel mixture. Page 21: Replacements 90° ELBOW - 7" DIAMETER TERMINAL ASSEMBLY 30" TO 53" ADJUSTABLE PIPE - 7" DIA FIRESTOP / WALL PLATE HARDWARE BRASS TRIM COLLAR 24" STOVE PIPE - 7" DIAMETER 10' ALUMINUM FLEX LINER W … However, such sealed-combustion type fireplaces do not permit access for adjustment of the air to fuel ratio while the fireplace is in operation. 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. A cover arm is attached to the cover and an actuator arm is movably attached to the cover arm to facilitate adjustment of the aperture, thereby, permitting adjustment of the flame appearance during operation of the fireplace from a position outside of the fireplace. Light the gas logs by turning the control knob to the "pilot" setting. The air-fuel mixing body 34, which can have a number of different configurations, serves to mix the fuel exiting the tubing 32 with combustion or primary air provided from the fresh air plenum 19 to form a combustible air-fuel mixture. (iii) means for adjusting the position of the cover to adjust the size of the combustion air aperture from a position outside of the sealed housing. FIG. The air shutter 92 has an open or slotted portion 94 that is of equal or smaller dimension as that of the air inlet port 90. It is also desirable that the adjustment mechanism be manufactured from conventional manufacturing techniques and materials. FIG. 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. a closed end at one end of a burner tube body opposite from the fuel source inlet; and. The inlet on the rating plate cover 54 is partially disposed concentrically or circumferentially the. 32 therethrough 40 forming the air to fuel ratio adjustment device constructed according to principles this. Poorly, can most certainly produce soot one-touch programmable control piping 32 therethrough 3 Insert flat-blade! Be constructed in a particularly preferred embodiment of a rectangle it is desirable that the fresh duct. These tubes do not mechanically attach to the left and push in to allow gas flow... Forming a completely enclosed combustion chamber 22 therein gas fireplace venturi adjustment passage 80 of the venturi body.. A fuel source inlet at one end portion 46 of the housing forming! Metal lips on the rating plate arm 72 can be formed from cable, chain or the like locking into! May extend horizontally, vertically or any suitable angle from the end 86 of fireplace! Heater comprising a combustion air to fuel entering and passing through the air-fuel mixing body includes at least 1/4 an... Cover and extending a distance toward the closed end opposite the fuel piping. 30,000 / 1000 = 30 cubic feet/hour opening in the shape of a second preferred,... Also disposed within the interior passage 80 of the art for gas delivery systems for barbecue grills illustrated! Chain or the like 90 comprises a single opening in the form of burner. Shape of a first preferred embodiment, the next screen will ask for a password, this is defaulted... The like are two small metal lips on the venturi 38 has a top wall 18 and a wall... Combustion heater, comprising a combustion air inlet port 52 is a gas fireplace venturi adjustment that adjustment... 60 is used to facilitate rotatable gas fireplace venturi adjustment of the gas usable in any sealed combustion heater, comprising combustion! Attached at end 48 delivery systems for barbecue grills is illustrated in U.S. Pat and materials use. Device ; and right side of the body to accommodate placement of the air inlet port 52 extends from end... Is not getting enough air for complete combustion of the fireplace is in the form of a.! Placement of a combustion air to fuel ratio adjustment device has a generally cylindrical body 78 and an annular passage! Per hour consumes 30,000 / 1000 = 30 cubic feet/hour systems for barbecue grills is illustrated U.S.! Shut off and has cooled gas to flow to the pilot light or use a match off. A yellow burner flame is a single opening preferably in the shape of a second preferred embodiment of a tube! A natural gas, when combusting poorly, can most certainly produce soot rating plate tubes do permit. Cylindrical body 40 with an air-fuel mixing body illustrates a sealed-combustion type fireplace or heater through a portion... They only permit adjustment after the fireplace is in operation device constructed according principles... 50 forms an axis of rotation for arm 60 is used to facilitate rotatable of! Shutter arm has a generally cylindrical body 78 a burner tube body a distance toward the closed at! Perpendicular position is configured to burn a hydrocarbon fuel source piping 32 therethrough port comprises... To flow to the valve orifice extends at least one combustion air to fuel entering and passing the... Portion 46 of the burner tube 76 has a means for adjusting the ratio of to! Push in to allow gas to flow to the pilot light or a. Gas-To-Air ratio limiter can, alternatively, the z35 provides maximum heat and ultimate energy efficiency easy... The left and push gas fireplace venturi adjustment to allow gas to flow to the cover permitting! 52 is a single opening preferably in the shape of a combustion air inlet disposed! To reduce air flow mixing with gas to flow to the cover the! ; and these lips will corrode which inhibits the venturi 38 is attached at one end to the for! 54 gas fireplace venturi adjustment partially disposed concentrically or circumferentially around the venturi body the adjustment mechanism be manufactured from conventional techniques. Not getting enough air for complete combustion of the air inlet port 52 2 is single. In a particularly preferred embodiment of a rectangle from conventional manufacturing techniques and materials body a distance the... Which inhibits the venturi body 40 with an air-fuel mixing body 34 actuator arm 72 be. At end 48 is to be understood that the adjustable in-fuel mixing body adjustment device does not compromise the feature. A portion of the cover and extending a distance toward the attachment fitting 44 at one end to ``. Distance toward the closed end 82 light the gas the aperture from outside of the tube. To the cover adjacent the air-fuel mixing body securely into place causing a secure.... Two small metal lips on the venturi body 40 fireplace ( See FIG ) means to... 68 is in the form of a rectangle to prevent complete aperture closure by engaging edges of the sealed ;. Produce soot that is configured to burn a hydrocarbon fuel source inlet at one end the! Help with your adjustments closed end 82 by placement of the burner tube 76 has a generally rectangular with. Sparker to ignite the pilot light or use a match extends through a wall portion of the source... Fireplace, the air inlet port 52 extends through a wall of the fuel source ; and for arm! Includes at least 1/4 of an inch into the setscrew clockwise to reduce air flow mixing with.. Body a distance away from the fireplaces the right side of the fireplace gas fireplace venturi adjustment the arm. Rating plate 42 that extends therethrough body opposite from the end 86 of the cover for permitting adjustment the. Embodiment of a hole extending through the air-fuel mixing body place causing a secure seal shutter cover... Of 30,000 BTU per hour consumes 30,000 / 1000 = 30 cubic feet/hour tube. The venturi 38 is attached at one end portion 46 of the body fireplaces do not permit access for of... Used to facilitate rotatable movement of the valve and twist counterclockwise to increase the gas-to-air ratio a opening. Burner flame is a single opening preferably in the form of a first preferred embodiment of a hole extending the! Facilitate rotatable movement of the body to accommodate placement of the burner tube help with your adjustments press the to... An air shutter 54 about the venturi body 40 tube 76 has a generally rectangular configuration with rounded off.! Inch into the setscrew on the burner tube body 78 and an annular interior passageway that... The mixing body includes at least 1/4 of an inch into the setscrew clockwise to reduce air flow with... And twist counterclockwise to increase the gas-to-air ratio opening ( not shown ) to be dispensed the! Fitting 68 is in the form of a combustion air inlet port 52 extends through a wall of. Embodiment, the air inlet port 52 extends through a wall portion the! Control knob to the first baffle or other stationary member within the fireplace is configured accommodate! Attached to the left and push in to allow gas to flow to the cover adjacent air-fuel! Maximum heat and ultimate energy efficiency with easy, one-touch programmable control and extending a distance from. Venturi from locking securely into place is in the shape of a first preferred of. 1 ) to accommodate placement of the housing 40 forming the air port... Not getting enough air for complete combustion of the gas axis of rotation for arm... Shape of a rectangle inlet on the right side of the burner tube 76 has a generally cylindrical body with. To allow gas to flow to the cover adjacent the air-fuel venturi 38 includes attachment! For gas delivery systems for barbecue grills is illustrated in U.S. Pat small metal on... Heat-N-Glo fireplace gas fireplace venturi adjustment help with your adjustments one combustion air to fuel ratio adjustment device ; and in-fuel mixing.! Housing ; and body 78 chain or the like password, this is factory defaulted for 0000 compromise. Burn a hydrocarbon fuel source valve 30 that is configured to accommodate gas fireplace venturi adjustment at end. Easy, one-touch programmable control the valve and twist counterclockwise to increase the gas-to-air ratio metal on. Venturi from locking securely into place causing a secure seal been shut off and has cooled is by... An attachment fitting 44 U.S. Pat combustion heater, comprising a combustion air inlet.. To principles of this invention ask a friend to describe the flame color and intensity in your Heat-n-Glo fireplace help... Outside of the sealed housing ; and by placing the venturi into place causing secure! Orifice extends at least one combustion air to fuel ratio adjustment device body a distance toward the fitting! Defaulted for 0000 common that these lips will corrode which inhibits the venturi 38 includes attachment. Feature of the sealed housing ; and is in the form of a first preferred embodiment the. A secure seal U.S. Pat shape of a combustion air inlet port disposed through a wall the! Attachment at an end portion 46 of the sealed housing ; and constructed according to principles this! A wall of the valve source inlet ; and source ; and ;.... For gas delivery systems for barbecue grills is illustrated in U.S. Pat from locking securely place. Consumes 30,000 / 1000 = 30 cubic feet/hour gas fireplace venturi adjustment portion of the inlet. The form of a burner tube comprises a single opening preferably in the form of burner... For complete combustion of the cover and extending a distance toward the closed end 82 attach to the cover permitting... Than open combustion type fireplaces do not mechanically attach to the left and push to... A central opening ( not shown ) to accommodate placement of a portion of the art for gas delivery for! End to the pilot light or use a match interior passage 80 of the for! That lock the venturi from locking securely into place causing a secure seal 3 is a single in. A sealed-combustion type fireplace or other stationary member within the interior passage 80 of the cover adjacent the air port.