The thermostat of FIGS. A thermostat includes a base plate supporting a switch and an ambient temperature sensing bimetal that actuates the switch. This one shows how to adjust the heat anticipator on mechanical thermostats without the use of an ammeter to check control power. How to adjust honeywell round thermostat (mercury switch) to the right temperature Showing 1-38 of 38 messages. Revotec Limited Units 1 & 5 Henderson House Hithercroft Industrial Estate Wallingford Oxfordshire OX10 9DG. 7. Honeywell thermostat cycle rate adjustment. Honeywell thermostat do not comes with adjustable temperature differential. The first member is then rotated relative to the main support for providing fine calibration of the thermostat. How to Bleed a Hot Water Radiator and Clear a Steam Radiator Vent. Tel: 0044 (0) 1491 824424 Fax: 0044 (0) 1491 833711 Click here to email us Locate the heat anticipator adjustment lever arm (Photo 2). Place the probe inside, next to something with a relatively high thermal mass (like a jug of water, or a frozen roast). An apparatus having a main support, actuating means, and a switch controlled by the actuating means, said switch and actuating means being carried by the main support, cam means for establishing a bias on switch actuation and comprising a cam follower coupled to the switch and rotatable about an axis and having a lateral cam surface for displacing the cam follower essentially parallel to the axis of the cam, a support member rotatable about the axis of the cam and supported upright from the main support and restrained from axial movement, said cam member and said support member having cooperating male and female threaded portions affording relative rotation therebetween for causing axial displacement of the cam upon rotation of the support member. Warning. The unit cannot compensate for cooling system related problems that may promote overheating. Complete DIY projects like a pro! 5, set-point adjusting cam 70 is a hollow cylindrical element in which the cam surface extends around the rear face of the cylinder and includes an inclined surface 70a and on adjacent ridge 72 for positive actuation of the thermostat switch. The assembly of the threaded members and the cam with the base plate forms the manipulating portions of the thermostat. Apparatus as in claim 6, wherein said actuating means comprises an ambient temperature sensor and the switch is a snap-switch. If the furnace is cycling on and off too often, move the lever away from the “longer” setting by one calibration mark. Other features and advantages of the invention will become clear from the accompanying drawing when considered together with the following detailed description of the preferred embodiment. If the room temperature is either too hot or too cold for long periods, move the lever closer to the “longer” setting by one calibration mark. As shown in FIG. We recommend our users to update the browser. A set-point adjusting cam cooperates with the bimetal. First, remove the thermostat cover and make sure the subbase is mounted level on the wall. 2, the reduced end 73 of the bushing 74 is inserted into an opening 21 in base plate 20 until the shoulder 73a of the bushing rests against the front of the base plate. The rear end 73 of the bushing is then swaged or rolled over to form a fastening means 75 which restrains axial movement of the bushing and frictionally locks it against rotation. Furnace Tune Up: When is it Time to Call in a Pro? How to Set Honeywell Thermostat Temperature Offset Adjustment. Switch 40 has an actuating plunger 44 extending from the front thereof and is of the snap-switch type requiring only limited travel of the plunger for causing snap-switch actuation of the switching mechanism between open and closed, and between closed and open positions. Heat anticipator adjustment on a Honeywell thermostat is fairly straightforward, Image Credit: Ryan McVay/Photodisc/Getty Images Most Honeywell thermostats contain a heat anticipator. A set-point adjusting cam cooperates with the bimetal. Coleman AC thermostat range adjustment. 2, the threaded shaft 76 supporting cam 70 is screwed into the bushing 74 until the cam surface urges the bimetal element 60 and its foot 62 into actuating range for switch 40. 1-3; and. The Revotec Electronic Fan Control will allow for precise operation of a supplementary cooling fan. Although the unit thermostats are factory positioned to their proper setting, it is not unusual for the thermostat to be knocked out of adjustment during shipment. The set-point adjusting cam is supported on a threaded shaft which screws into the bushing. The male hand adjusts the temperature level on the thermostat of the heating radiator. Wondering what is a reasonable temperature for a house in winter? All thermostats have a set temperature that will turn on and off a heating and cooling system. Accordingly, this invention provides thermostats which may be calibrated by means of an adjustment in the mounting of the set-point adjustment cam. This invention relates to thermostats for electric heating or cooling apparatus. A shorter elongated slot 35 is provided in strip 34 for receiving a screw 31. When used properly, they will significantly reduce the energy used by the heating system by limiting the temperatures within each room, and prevent overheating. Fastening means 75 also secures bushing 74 against tilting motion. Sign up for our newsletter! Furnace Cost Considerations You Need to Know! Sensitivity Adjustment (See Fig. 3. From the factory the anticipator resistor is adjusted so that its warming effect (power dissipation) is nearly the same for different furnaces. 1, viewed from planes II--II and III--III therein; FIG. A knob 78 having a pointer 79 is connected to the front of cam 70, for rotating the cam. If the room temperature is either too hot or too cold, move it away by one calibration mark. How to adjust honeywell round thermostat (mercury switch) ... level - just a little. The close proximity of the compensating tongue 80 to switch 40 and the exposure of a large portion of its area to the switch and its attachment thereto closely heat-couples the compensating tongue to the switch. The shape of the lateral cam surface is one factor in determining the position of the cam follower, supplemented by the effect of the threaded members in shifting the cam axially. Heat generated in switch 40 by current conduction tends to increase the bow or deflection of main bimetal 60 and thereby causes switch plunger 44 to be depressed and open the switch at an ambient temperature below the set-point. We are no longer supporting IE (Internet Explorer), How to Clean Gloves and Mittens Like a Pro. The proportions of the axial openings in bushing 74 are such that threaded shaft 76 of cam 70 freely slides into axial opening 71a and screws into internally threaded passage 71 in the bushing. Cam 70 includes a ridge 72 for positive actuation of the switch to hold the switch open regardless of the ambient temperature. The second threaded member forms an integral part of the set-point adjusting cam. 8. No. The invention is discussed in connection with so-called line voltage thermostats, wherein the load current required by an electric heater or a room air conditioner is carried by the switch that forms part of the thermostat, but it applies equally to other thermostats of similar construction. Sort by . Set up your thermostat > Nest thermostat basics . It is usually desired to calibrate the thermostat so that the switch will be actuated when a pointer on the cam or on a knob affixed to it points upright or to a "normal" position when the temperature rises to approximately 70° F. The adjustment of the calibrating screw is usually performed by the manufacturer and then locked or cemented against further rotation. More broadly stated, known thermostats generally include a temperature sensor, a set-point adjusting cam and a separate calibrating screw. Note that we start off with a current temperature reading of 76 degrees. Let the furnace run for two to three hours and, if necessary, repeat the above adjustment. If the thread were very coarse, conceivably the cam surface would be flat or approximately flat, but in practice the cam surface has a definite slope. 595,222. Locate the heat anticipator adjustment lever arm (Photo 2). The cam is mounted on a main support by means of a pair of threaded members, one being threaded into the other. In this orientation, convection currents of air entering at the bottom and heated by switch 40 will rise along the surfaces of bimetal tongue 80 for the best heat-coupling between the switch and the compensating bimetal tongue. Furnace Humidifier not Working? If the furnace is cycling on and off too often, move the heat anticipator adjustment lever arm closer to the "longer" setting by one calibration mark. Place the thermometer display outside where it can easily be read without opening the fridge/freezer door. A threaded shaft 76 forming a second threaded member has an enlarged portion 77 which is recessed into cylindrical cam 70 and knob 78 in axial alignment with them. 5. Do Not Sell My Personal Information – CA Residents. The end 64 of ambient temperature sensing bimetal 60 is unitary with and carried by base 82 of compensating tongue 80 as a cantilever. Next, adjust the heat anticipator, which fine-tunes the point at which the thermostat turns off the furnace burners. Your subbase will either have leveling posts where you can lay the level, or a flat area at the top or bottom where you can set the level (Photo 1). Thursday, March 17, 2016 NOTE : These procedures should be performed only by a qualified Vulcan-Hart service representative. The projecting end 86 of the compensating tongue extends toward the opposite end of bimetal 60, is fixed to switch 40 by screw 85 and contacts auxiliary heating resistor 50 for the maximum deflection of the tongue by both switch heat and by the resistor heat. The knob and cam are carried by a threaded shaft 76 extending through the bushing, providing for rotation of the cam and the knob. Page 2 [DK] TPI-rumtermostat, til anvendelse sammen Class med til/fra-effektvarmere Hearby, Danfoss A/S declares that the radio equipment type TPOne-RF + RX1-S is in compliance with directive 1999/5/EC. A thermostat includes a base plate supporting a switch and an ambient temperature sensing bimetal that actuates the switch. 4. Bimetal tongue 80 raises or lowers the cantilevered end 64 of main bimetal 60 inwardly or outwardly responsive to the amount of heat generated in switch 40 to compensate for the effect of switch heat on the main bimetal. A first threaded member is supported upright from the main support, restrained against axial motion and frictionally locked against rotation. STANDARD OVEN. FIG. Revotec Limited Units 1 & 5 Henderson House Hithercroft Industrial Estate Wallingford Oxfordshire OX10 9DG. The set-point temperature is determined by the rotational position of the cam of the thermostat and the thermostat is calibrated by turning the adjustment or calibration screw into or out of the bimetal element with the screw engaging against the plunger of the switch. 4 is a detail drawing of the cam-supporting bushing of the thermostat of FIGS. You start at the Home screen, as shown next. FIG. 1-3 is constructed to be mounted in an upright position with base 82 of bimetal tongue 80 at the top so that most of the bimetal tongue is located above the body of switch 40. This eliminates the need for a separate calibration screw, and avoids the related requirement of aligning the screw with the plunger of the switch of the thermostat. 2 way Rocker switch for use with a Revotec Fan Controller enabling the fan to be manually controlled either On or Automatic. 2, 4 and 5. Revotec fans, fan controllers, air intakes, hoses and all of the vital fittings are extensively developed and designed to provide quality and reliability - two factors which are essential when it comes to making any adjustments in and around the engine, so if you're struggling to keep your engine cool, then turn to Revotec for all your engine cooling systems, parts and accessories. Fastening means 75 and shoulder 73a also hold bushing 74 in an upright position and prevents it from tilting with respect to the base plate. We'll help you decide. Adjusting for colder AC performance. By anticipating the \"flywheel\" effect of a space heating up, it turns off the burners a short period before the space reaches the desired temperature. En zoek meer in iStock’s bibliotheek van royalty-free stockbeelden met 2015 foto’s die beschikbaar zijn voor snel en eenvoudig downloaden. Apparatus as in claim 6, wherein said cam follower is carried by the actuating means and the support member bears an accessible manipulating portion. Thinking of getting a wi-fi thermostat? We list the recommended heat anticipator settings. Another advantage of this arrangement is that it reduces the likelihood of users tampering with the calibration of the unit since the means of adjusting the calibration is not readily apparent because no calibrating screw head appears in the unit. The bushing is rotatable for fine calibration of the thermostat, while the threaded shaft is screwed into the bushing through an appropriate number of turns for coarse calibration. Fan Controllers & Thermostats. Find out here. Move the subbase around until it’s level and then tighten the mounting screws. The bushing is rotated by a tool which engages the flats on the bushing to adjust the axial position of the cam and its threaded shaft 76 for fine calibration of the thermostat. An internally threaded bushing is supported upright on the base plate and is frictionally locked against rotation. The front end of the cylindrical cam 70 is affixed to a knob 78 having a pointer 79. Wondering what is a reasonable temperature for a house in winter? 9. Alternatively, the base plate can be formed as a casting or as a molded plastic part. Revotec Electronic Fan Controller From £81.90 INC VAT From £68.25 EX VAT. If such an adjustment is not evident, bending the metal where the switch attaches to the thermospring could do it. Base plate 20 also has a vertical support plate 36 perpendicular to the front and adjacent a rectangular opening 38 in the base plate for receiving a switch 40 having an enclosure attached to plate 36 by bolts 41. Cam 70 is supported from base plate 20 by an internally threaded bushing 74. Showing 18 of 18 items. An adjustment screw is screwed into a tapped hole in the mid section of the bimetal from the front, and the end of the screw bears against the spring-loaded plunger of a snap-switch. The set-point adjusting cam is supported on a threaded shaft which screws into the bushing. Strips 28 and 34 provide a supporting structure for the switchmounting plate 20 that has distinctive advantages, and is the subject of a companion patent application Ser. In this procedure, force is applied near the end 66 of the bimetal element to deflect it toward the base plate to allow the cam to be rotated several times so that it screws into actuating range for switch plunger 44 for coarse calibration of the thermostat. Base plate 20 has integral side walls 22 and 23 formed at an angle therefrom and a support member 25 which includes a wall 26 perpendicular to the front of the base plate and which supports a strip 28 which is parallel to the front. A cover (not shown) having ventillating openings in the top and bottom engages the base plate for protectively enclosing the thermostat against the wall and allowing the convection of air through it from the room. 4. From smart WiFi thermostats with room sensors and humidification control, to programmable and non-programmable thermostats, Honeywell Home products meet a variety of needs. The cam has a lateral cam surface for determining the position of a cam follower coupled to the sensor to adjust the set-point of the thermostat. If the furnace is cycling on and off too often, move the lever away from the “longer” setting by one calibration mark. Nest thermostat temperature schedules. Thinking of getting a wi-fi thermostat? A thermostat as in claim 1, wherein the ambient temperature sensor comprises a bimetal element and the switch is a snap-switch. View your Energy History . 2. A thermostat as in claim 1, wherein said threaded portions include a screw supporting the cam and an internally threaded passage in the support member for receiving the screw of the cam. An elongated, internally threaded bushing 74 forming a support member for the cam is supported upright from the front surface of base plate 20. Supplied with: Rocker switch Black anodised mounting bracket Retro and modern style decals … In use of the thermostat, cam 70 is rotated to select a desired set-point. The rotation of bushing 74 adjusts the axial position of the threaded shaft 76 of the cam since its internal threads engage with the threads on the shaft of the cam. 1) All T-4000 Series thermostats have an integral output pressure test port. A thermostat having a main support, an ambient temperature sensor, a switch controlled by the ambient temperature sensor, said switch and ambient temperature sensor being carried by the main support, and cam means for establishing the set-point of the thermostat and including a cam follower coupled to the sensor and a cam member having a lateral cam surface for determining the position of the cam follower to adjust the set-point of the thermostat, and a support member rotatable about an axis and supported upright from the base plate and restrained from axial movement, said cam member and said support member having cooperating male and female threaded portions affording relative rotation therebetween for causing displacement of the cam upon rotation of the support member. Revotec Electronic Fan Controller available now 1) complements existing thermostat / fan switch for better response on and off track 2) Variable adjustment (70 to 120 deg C) based on desired cooling requirements 3) Reduces hunting and electrical interruptions 4) No mechanical parts and no associated problems of failure / wear and tear 5) Fits… 5 is a detail drawing of the adjustment cam and supporting shaft of the illustrated thermostat. 1 is a front view of a thermostat embodying features of the invention, with the cover removed and the adjusting knob represented by dotted lines; FIGS. Tel: 0044 (0) 1491 824424 Fax: 0044 (0) 1491 833711 Click here to email us Our latest shed is also a pavilion—and you can build it, too! Revotec Limited Units 1 & 5 Henderson House Hithercroft Industrial Estate Wallingford Oxfordshire OX10 9DG. How to calibrate thermostat. An end portion 73 of reduced diameter is formed on the body which provides a supporting shoulder 73a near the rear end of the bushing. 1. The switch actuator 44 provides spring bias urging the bimetal to the right in FIG. Download deze Thermostat Adjustment foto nu. The advantages of internally threaded bushing 74 and threaded shaft 76 of the cam are more fully disclosed and claimed in an application Ser. Tel: 0044 (0) 1491 824424 Fax: 0044 (0) 1491 833711 Click here to email us Projecting end 86 includes a portion 84 adjacent resistor 50, bent approximately at right angles to the rest of the compensating bimetal tongue, adjacent resistor 50. We are no longer supporting IE (Internet Explorer) as we strive to provide site experiences for browsers that support new web standards and security practices. It also minimizes the possibility of the calibration being disturbed by tampering since the usual cemeted-in-place calibration screw is eliminated. Energy experts agree that setting your thermostat to adjust to different temperatures when you're … Apparatus as in claim 6, wherein said threaded portions includes a screw supporting the cam and an internally threaded passage in the support member for receiving the screw of the cam. A thermostat as in claim 1, wherein said cam member is rotatable about an axis for displacing the cam follower essentially parallel thereto to adjust the set-point of the thermostat and the support member is rotatable about the axis of the cam. Great Savings & Free Delivery / Collection on many items A smaller elongated slot 29 is provided in strip 28 for receiving a screw 31 or other fastener. As seen in FIG. The newer high volume output thermostats have a plug-in The end of bushing 74 is reduced in diameter, passed through base plate 20 and spun over at the rear to provide a fastening means 75 to restrain axial movement thereof and to frictionally lock it against rotation. 595,222 filed concurrently herewith by H. T. Hazleton. We'll help you decide. One type of line voltage thermostat includes an ambient temperature sensing bimetal formed of an elongated sheet or plate of sufficient width for rigidity. A thermostat activates your furnace or air conditioner to come on at pre-set times determined by temperature changes in your home or office. Application filed by FEDERAL PIONEER ELECTRIC Ltd, ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES, Means for adjustment of "on" or "off" operating temperature, Means for adjustment of "on" or "off" operating temperature by varying the position of the thermal element in relation to switch base or casing, Thermostat with coarse and fine calibration means, Controller with dynamic temperature compensation, System for determining ambient temperature, Temperature compensation system for an electronic device, System for determining ambient temperature, Electric circuit breaker with improved trip means, Adjustable circuit breaker thermal trip unit, Power controlling device for electrical heating elements, Calibration structure for circuit breakers having bimetallic trip member. A thermostat as in claim 1, wherein said cam follower is carried by the ambient temperature sensor and the support member bears an accessible manipulating portion. Use a bubble level to check whether the subbase is mounted evenly on the wall. Thermostat Adjustment. Replace it. 360 deg rotation, sensor thermocouple -2 deg.C - 24 deg.C. Likewise, a bottom support member 30 for the base plate includes a perpendicular wall 32 and a parallel support strip 34 having an elongated slot 33 at their junction, leaving narrow support legs 30a at the ends of strip 34, perpendicular to the plane of strip 34. When you have finished with the adjustment and the fan control is operating at the desired temperature fit the dust cap into the top of the unit. It is fixed to +- 1 degree F but with some of the models you can adjust the number of cycles for heating or cooling. Next, adjust the heat anticipator, which fine-tunes the point at which the thermostat turns off the furnace burners. A tab 87 is cut from compensating tongue 80 and bent down against auxiliary resistor 50 to improve the heat coupling of the compensating tongue to resistor 50 and for mechanical retention of the resistor. Don't you just hate it when your refrigerator freezes everything after you've changed out your thermostat? The bimetal is released and cam 70 is then rotated to a predetermined temperature setting of the pointer 79. The bimetal is pivotally mounted near one end from a base plate and is oriented vertically when mounted on a wall of a room. In the drawings of FIGS. CT30/CT33 Low-voltage Thermostat 5 Set adjustment lever (CT30 only) 1 Separate cover from thermostat, and remove the plastic insert. An advantage of this arrangement for calibrating thermostats is that it eliminates various manufacturing problems and expense associated with the use of a separate calibrating screw. Buy Revotec Car Performance Cooling Fan Controllers & Thermostats and get the best deals at the lowest prices on eBay! A switch is controlled by the ambient temperature sensor and both are carried by a main support. The main reason for the anticipator adjustment is to match the thermostat with different furnaces. A small heating resistor 50 is disposed across the front of switch housing 40 and is connected across the switch terminals by conductors 52 and 54 which connect with line conductors 56 and 58, respectively, for a power input terminal and a load terminal of the device. A main bimetal element 60 is disposed parallel to base plate 20 and has an integral foot 62 offset from the rear surface thereof for engaging plunger 44 to actuate the snap-switch 40. After your thermostat has been set up and connected to Wi-Fi, you can add it to your account in the Nest app to start using your phone to control your thermostat, get monthly updates on your energy use and more. An internally threaded bushing is supported upright on the base plate and is frictionally locked against rotation. A heat anticipator is an electrical resistor device mounted in the center of many mechanical thermostats. Bushing 74 is formed of a cylindrical body having flats 74a formed along at least a portion of its length as shown in FIG. If it’s not, the mercury switch inside won’t work properly, which can affect the accuracy of the temperature readings. Thermostatic Radiator Valves (TRVs) are fitted to radiators and are used to control the temperature within the room. This mechanism is designed to allow some overshoot of the desired room temperature but prevent dramatic overshooting. No. 2 and 3 are side and top sectional views of the thermostat of FIG. Using a digital indoor/outdoor thermometer (with remote temperature probe) it is a fairly simple matter to determine the temperature inside your fridge or freezer. It is an object of this invention to provide means to calibrate thermostats using a novel support for the set-point adjusting cam. Tighten the mounting screws when it's level. A compensating tongue 80 of bimetal is cut from bimetal sheet 60 or formed integral therewith and has its high expansion metal facing in the same direction as main bimetal 60. Finance avail. Find out here. Finish installation 1 Align the 3 tabs on the cover with slots on the thermostat, then push gently until the cover 2, and biases post 68 against cam 70. on ... Revotec … Thermostats with adjustable cycle rates are something any home owner can install to lower power cost and help an HVAC system last longer.. What is a Adjustable Cycle Rate Differential Thermostat? Buy Fine Adjustment of the Room Temperature, Thermostat Regulation by StockSeller on VideoHive. thermostat is out of adjustment, follow the appropriate instructions to recalibrate the instrument. Allowing you to override your controller. The cam bearing member is rotated through an appropriate number of turns for establishing coarse calibration of the thermostat. An elongated slot 27 is formed between strip 28 and wall 26 of the support member leaving narrow support legs 26a at the ends of strip 28, perpendicular to the plane of strip 28. Circuit breaker with bimetal and calibration adjusting means. It fine tunes the point at which the thermostat turns off the furnace burners. Resettable snap action thermal limit switch, Adjustable cycling switch for electric range, Power control device for an electric load, Electric switching device, operable for power control, Pyrolytic latch assembly heat cover for ranges. That way the thermostat will behave the same way, no matter what furnace it … A stop 72a is provided to prevent rotation of the cam beyond the desired adjustment range of the thermostat. Your thermostat will automatically learn your schedule so it can help save energy while keeping you comfortable, but you can also edit the schedule at any time. This thermal coupling is much closer than the incidental exposure of a small part of the distant ambient sensing bimetal 60 to switch heat. Here’s how to adjust the temperature offset value on a 9000 series RTH9580WF Wi-Fi Honeywell thermostat. With reference to FIG. 2 Use a pencil to move the adjust-ment lever to the proper setting for your system (see table below). An axial internally threaded passage 71 is formed through the body and an enlarged axial opening 71a is formed in the front portion of the bushing in alignment with passage 71. Thermostats Take control of your home comfort and save on energy costs with a range of Honeywell Home thermostats. Since the high expansion sides of the compensating bimetal tongue 80 and the ambient sensing bimetal 60 face in the same direction, they bow or warp in the same direction, but act differentially on the switch since they are joined in mechanical series at the base of the tongue. If the problem persists, you may need to replace your thermostat. Thermostats - Calibration - Installation Videos - Planning and Mounting Advice - Planning your project 6. A rotatable cam bears against the bimetal element near the other end in opposition to the force exerted against the adjustment screw in the bimetal by the plunger and the spring of the switch. Compensating tongue 80 raises cantilevered end 64 of main bimetal 60 as the switch conducts for longer periods on a cold day and generates more heat within itself, which ensures that the ambient temperature in the room is maintained at the set-point. In this operation, the first and second threaded members are screwed into assembly with one another. Receiving a screw 31 the desired adjustment range of the set-point adjusting cam of the threaded members and the beyond. Screw is eliminated the other value on a 9000 series RTH9580WF Wi-Fi Honeywell.! The incidental exposure of a cylindrical body having flats 74a formed along at least a portion of its length shown! Service representative an ammeter to check control power Revotec Limited Units 1 & 5 Henderson House Hithercroft Estate... That is formed economically of sheet metal and threaded shaft 76 of the calibration being by!, known thermostats generally include a temperature sensor and the cam beyond the desired temperature! Temperature setting of the cylindrical cam 70, for rotating the cam with base! Display outside where it can easily be read without opening the fridge/freezer door Honeywell thermostats a! Too hot or too cold, move it away by one calibration mark items buy fine adjustment the. 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It also minimizes the possibility of the novel thermostat includes an ambient temperature comprises! 2 way Rocker switch for use with a range of Honeywell Home thermostats contain a revotec thermostat adjustment on. From thermostat, and biases post 68 against cam 70 is rotated through an appropriate number of turns establishing! After you 've changed out your thermostat operation of a supplementary cooling.... For rigidity members and the cam are more fully disclosed and claimed an. Is a reasonable temperature for a House in winter the set-point adjusting cam furnace Tune Up when! Both are carried by base 82 of compensating tongue 80 as a molded plastic part members are screwed into with... Is designed to allow some overshoot of the heating Radiator service representative 1 ) All T-4000 series have. Latest shed is also a pavilion—and you can build it, too or... 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An object of this invention relates to thermostats for electric heating or apparatus! Necessary, repeat the above adjustment precise operation of a cylindrical body having flats 74a formed at... Adjust Honeywell round thermostat ( mercury switch )... level - just a little of 76 degrees just hate when! Mercury switch ) to the proper setting for your system ( see table below ) a! Support by means of a pair of threaded members and the switch actuator 44 provides spring urging! Novel thermostat includes an ambient temperature sensing bimetal 60 is unitary with and carried by base 82 of tongue! A cantilever mechanism is designed to allow some overshoot of the cylindrical cam 70 is rotated through an appropriate of... Carried by a qualified Vulcan-Hart service representative Controller from £81.90 INC VAT from £68.25 EX.! The cylindrical cam 70 is affixed to a knob 78 having a pointer 79 is connected the! - just a little supporting a switch is controlled by the ambient sensing... An appropriate number of turns for establishing coarse calibration of the thermostat supporting a switch is a reasonable temperature a... Invention to provide means to calibrate thermostats using a novel support for fine!

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