York G8C Series Installation Instructions Manual

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York G8C Series Installation Instructions Manual Manual pdf 15 page image

035-15241-003 Rev. A (201)Unitary Products Group 153. Insofar, as is practical, close all building doors and win-dows and all doors between the space in which the appli-ances remaining connected to the common ventingsystem are located and other spaces of the building.Turn on clothes dryers and any appliance not connectedto the common venting system.Turn on any exhaust fans, such as range hoods andbathroom exhausts, so they will operate at maximumspeed. Do not operate a summer exhaust fan. Close fire-place dampers.4. Follow the lighting instructions. Place the appliancebeing inspected in operation. Adjust thermostat so appli-ance will operate continuously.5. Test for spillage at the draft hood relief opening after fiveminutes of main burner operation. Use the flame of amatch or candle, or smoke from a cigarette, cigar, orpipe.6. After it has been determined that each appliance remain-ing connected to the common venting system properlyvents when tested as outlined above, return doors, win-dows, exhaust fans, fireplace dampers, and any othergas-burning appliance to their previous condition of use.7. If improper venting is observed during any of the abovetests, the common venting system must be corrected.Any changes to the venting system must be in accor-dance with the National Fuel Gas Code, ANSI Z223.1. InCanada, any changes to the venting system must be inaccordance with the latest edition of the CAN/CGA-B149Installation Codes and applicable local codes. If any por-tion of the common venting system must be resized, itshould be resized to approach the minimum size asdetermined using the appropriate tables in Appendix G inthe National Fuel Gas Code, ANSI Z223.1 or in Canada,the latest edition of the CAN/CGA-B149 InstallationCode.SIDEWALL VENTINGFor applications where vertical Category I venting is not pos-sible, the only recommended method of sidewall venting isthrough the use of an accessory power venter. Only powerventers approved by a nationally recognized approval agencymay be used.Approved power venters are Tjernlund Models GPAK-JT orGPAK-1T and Field Controls Models PVG-2 or SWG-4HD.For installation details, follow the installation instructions sup-plied with the power venter.NOTE: It is recommended that a post-purge timer be used.This is a device that keeps the power venter in operation for ashort period at the end of each burner cycle in order to clearout all flue gases from the vent. Manufacturers of power ven-ters also can supply post-purge timers.ELECTRICAL WIRINGAll internal wiring has been made at the factory. Field wiringrequires only the connection of line voltage supply wiring andlow voltage thermostat wiring.Service wiring and control wiring may be brought into the fur-nace through either side using the holes provided.Refer to the unit rating plate and specification tables found inthese instructions for applicable electrical characteristics andrequirements. A complete wiring diagram is supplied on Page19.SERVICE WIRINGField wiring connections should be made inside the furnacecasing and a suitable strain relief should be used at the pointthe wires exit the furnace casing. In order for the electricalcontrols in the furnace to operate properly, correct electricalpolarity must be observed. If the furnace does not work oninitial start-up and the diagnostic light on the furnace controlflashes nine times, the polarity is reversed. Field wiring of theunit should conform to local codes or in the absence of localcodes with the National Electrical Code ANSI/NFPA 70. InCanada, field wiring of the unit should conform to local codesor in the absence of local codes with the Canadian ElectricalCode.A separate fused circuit from the main electrical panel shouldserve only the furnace.ELECTRICAL GROUNDINGThe furnace casing must have an uninterrupted electricalground in accordance with the National Electrical Code ANSI/NFPA 70 or, in Canada, with the Canadian Electrical Code,CSA C22.1. DO NOT use gas piping as an electrical ground.CONTROL WIRINGThe thermostat should be installed in accordance with themanufacturer's instructions, furnished with the thermostat,and make connections to the unit as shown on the unit-wiringdiagram. It is recommended that size 18 AWG wire be used.HEAT ANTICIPATORIf the wall thermostat has an adjustable heat anticipator, thesetting should be .48 amps. If any accessories are to be con-nected to the furnace, the heat anticipator setting maychange. Use a suitable ammeter to measure the actual antic-ipator current.When sidewall venting these furnaces with apower venter, it is required that a barometric draftdamper be installed in the vent near the furnace.Failure to do so could cause a malfunction of thefurnace resulting in asphyxiation.