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Fan Minimum On Time; Quick Changes (used to turn the fan ON for a limited amount of time) Heat/Cool Dissipation Time; Fan Mode in Comfort Settings . Get the best deals on Furnace Fan Limit Switches when you shop the largest online selection at eBay.com. A furnace is converted to LP and there is large amounts of soot in the heat exchanger indicating the ____________ is too large. The R value for "one inch" of insulation for round metal ducts in R = _______, Instrument for calculating carbon dioxide in flue gas is a _____________________. [post_title] $1184.00 Description: Cooling: The fan delay-off period is set by dip switches on the COOLING OFF – DELAY OPTIONS SWITCH SETTINGS SELECTION NOMINAL AIRFLOW 5 – OFF 6 Trane Upflow / Horizontal Gas Furnace – Variable Speed – 2 Stage Heat TUD120R9V5K ⁄Spring loaded fan control assembly ‹Furnace next to the blower. If you have a gas furnace or other type of heating system the fan will be controlled differently either by time delay or temperature. The most common burner used in induced draft furnaces is __________________. Honeywell Furnace Temperature Fan Limit Switch Control – The fan limit control turns the fan on and off in furnace applications. The furnace fan motor is rated at 1/3 HP at 120 VAC. $9.00 shipping. Switch Fan… failure to wire a replacement low voltage transformer in an electronic ignition furnace, based on its noted polarity will cause __________ problems, gas flow volume to a natural gas furnace can be checked using the __________ installed at the site, exact ammount of air supplied and perfect combustion occurs in a N.G. Put away tools and instruments. LP gas has a specific gravity of _____________. Before changing the igniter the technician should, A technician starts a standing pilot furnace and notices on main ignition the flames "roll out". It also can shut down the furnace burners if things are getting too hot inside the furnace. The tech suspects a defective _________________, The factory settings for a standing pilot furnace that has a bi-metal/ limit control are fan on _____ degrees F / fan off _____ degrees F/ limit cut _____ degrees F, Type B vent pipe is constructed with an inner pipe and outer pipe. Gary Brinck – RVForum.net 3/14/2008 Page 3 Some higher end models may use a temperature sensor to determine when the blower should come on, but this is a less common setup. Fan time/temperature delay switches are used on gas furnaces to allow the _____________________ to warm up. The technician suspects, A technician starts a spark type ignition furnace. The inner pipe is made of, On a dedicated vent system, a fire stop support plate is located, When venting Category I furnaces, it is sometimes necessary to increase the vent pipe size. • Indirect Gas Furnace: Furnace controller will modulate or stage the indirect gas furnace to maintain the supply temperature set point. Gas furnace installed in the garage must have the burner installed __________ in above the floor. An inclined manometer measures ____________ pressures only. FURNACE STOP COMMAND (OR DE-ENERGIZED): • Main furnace and all slave furnaces shut down. ___________________ aids in decreasing combustion by-products. The purpose of a spoiler screw located on a burner or adjustable shutter is to ___________________________________________. What percentage of CO is acceptable in a sample of the flue gas, A technician starts up a 5 year old natural gas furnace. The fan circulates the warm or cold air inside the home. This setup requires a 6-spade relay. The maximum pressure drop allowance is approximately _____ in W.C. Gas piping must be installed with a pitch of _______________________, A technician is installing a copper elbow on LP gas line; what should be used ____________________________, To burn one cubic foot of Natural Gas completely, at least _____ cubic foot of combustion air must be available. The ON is the time delay before the fan starts after a call for heat. Remove jumpers from R and W/W1 and W2. What is the approx. What type of connectors are specified to control this, Duct wrap is used to insulate round metal ducts. The technician suspects, A technician servicing an LP gas furnace notices a tag stating it was converted from natural gas. The elbow for the combustion air intake, above the roof, should, The reason heating thermostat have anticipated is to, The typical flue gas temperature of a Category III furnace is, Burning one cubic foot of natural gas will produce approximately _____ BTU's, A furnace nameplate specifies a temperature rise of 40 to 70 degrees. The main burner lights and after 60 seconds the blower fan comes on, but the burner flames wavers in one corner. NG furnace usually requires ________ in W.C. at the manifold. Gas furnaces installed at altitudes above _______ feet needs to have adjustments to operate properly. The technician suspects, A standing pilot furnace has a bi-metal fan/ limit control. The vent system for a condensing furnace is classified as ____ by the National Field Gas Code. The LP gas pressure supplied to the appliance gas valve should be, An installed gas furnace should have a minimum of, Which conditions listed below would cause the temperature limit safety switch to shut off the burner, A good thermocouple should read approximately ____ on a D.C. meter, Fan time/temperature delay switches are used on gas furnaces to, What instrument would a technician use to measure return airflow to a furnace, A furnace with a hot surface igniter will not light.

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