York TM8V C Series Installation Manual

Contents

York TM8V C Series Installation Manual Manual pdf 22 page image

5402847-UIM-A-091722 Johnson Controls Unitary ProductsSECTION VII: START-UP ANDADJUSTMENTSThe initial start-up of the furnace requires the following additionalprocedures:When the gas supply is initially connected to the furnace, the gas pipingmay be full of air. In order to purge this air, it is recommended that theground union be loosened until the odor of gas is detected. When gas isdetected, immediately retighten the union and check for leaks. Allowfive minutes for any gas to dissipate before continuing with the start-upprocedure. Be sure proper ventilation is available to dilute and carryaway any vented gas.NOx SCREEN REMOVAL (Lo-NOx Models Only)If the furnace is equipped with NOx screens and is to be used with LP(propane) gas, the screens must be removed prior to start-up.1. Make sure that the electrical power to the unit is turned off and thatthe gas supply is turned off at the shut-off valve.2. Remove the blower compartment and burner compartment accessdoors.3. Disconnect the gas supply piping at the union to permit removal ofthe entire burner and gas control assembly from the vestibulepanel. Use the wrench boss on the gas valve when removing orinstalling the piping.4. Unplug the igniter from the wire harness. Disconnect the flame sen-sor wires located on top of the air shield. Unplug the gas valve fromthe wiring harness.5. Remove the screws holding the burner assembly to the vestibulepanel.6. Remove the burner assembly. It should be possible to swing theburner assembly out of the way without disconnecting the remain-ing wires.7. With the burner assembly out of the way, simply slide the NOxscreens out of the heat exchanger tubes and discard the screens.8. Replace all components in reverse order. Reconnect all wiring.WARNINGCARBON MONOXIDE POISONING HAZARDFailure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon-monxide poisoning or death.The following steps shall be followed for each appliance connected to the venting system being placed into operation, while all other appliancesconnected to the venting system are not in operation:1. Inspect the venting system for proper size and horizontal pitch. Determine that there is no blockage, restriction, leakage, corrosion or otherdeficiencies, which could cause an unsafe condition2. Close all building doors and windows.3. Turn on clothes dryers and TURN ON any exhaust fans, such as range hoods and bathroom exhausts, so they shall operate at maximumspeed. Open the fireplace dampers. Do not operate a summer exhaust fan.4. Follow the lighting instructions. Place the appliance being inspected in operation. Adjust thermostat so the appliance shall operate contin-uously.5. Test each appliance (such as a water heater) equipped with a draft hood for spillage (down-draft or no draft) at the draft hood relief openingafter 5 minutes of main burner operation. Appliances that do not have draft hoods need to be checked at the vent pipe as close to theappliance as possible. Use a combustion analyzer to check the CO2 and CO levels of each appliance. Use a draft gauge to check for adowndraft or inadequate draft condition.6. After it has been determined that each appliance properly vents when tested as outlined above, return doors, windows, exhaust fans, fire-place dampers and any other gas burning appliance to their normal condition.7. If improper venting is observed during any of the above tests, a problem exists with either the venting system or the appliance does nothave enough combustion air (Supply Air from outside) to complete combustion. This condition must be corrected before the appliance canfunction safely.NOTE: An unsafe condition exists when the CO reading exceeds 40 ppm and the draft reading is not in excess of - 0.1 in. W.C. (-25 kPa) withall of the appliance(s) operating at the same time.8. Any corrections to the venting system and / or to the supply (outside) air system must be in accordance with the National Fuel Gas CodeZ223.1 or CAN/CGA B149.1 Natural Gas and Propane Installation Code (latest editions). If the vent system must be resized, follow theappropriate tables in Appendix G of the above codes or for this appliance.!IMPORTANTAll electrical connections made in the field and in the factory shouldbe checked for proper tightness.