York SUNLINE DCG Series Installation Manual

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York SUNLINE DCG Series Installation Manual Manual pdf 16 page image

290699-YIM-B-060716 Unitary Products Group6. The furnace and its individual manual shut-offvalve must be disconnected from the gas supplypiping system during any pressure testing of thatsystem at test pressures in excess of 1/2 psig(3.48kPa).The furnace must be isolated from the gas supplypiping system by closing its individual manual shut-off valve during any pressure testing of the gassupply piping system at test pressures equal to orless than 1/2 psig (3.48kPa).7. A 1/8 inch NPT plugged tap, accessible for testgage connection, must be installed immediatelyupstream of the gas supply connection to the fur-nace.L.P. UNITS, TANKS AND PIPINGAll gas heat units are shipped from the factoryequipped for natural gas use only. The unit may beconverted in the field for use with L.P./propane gaswith accessory kit model number 1NP0440.All L.P./propane gas equipment must conform to thesafety standards of the National Fire Protection Associ-ation.For satisfactory operation, adequate L.P./propane gaspressure must be provided at the unit manifold underfull load. Maintaining proper gas pressure depends onthree main factors:1. The vaporization rate depends on (a) the tempera-ture of the liquid and (b) the “wetted surface” areaof the container or containers.2. The proper pressure regulation. (Two-stage regula-tion is recommended from the standpoint of bothcost and efficiency.)3. The pressure drop in the lines between regulatorsand between the second stage regulator and theappliance. Pipe size required will depend on thelength of the pipe run and the total load of all appli-ances.Complete information regarding tank sizing for vapor-ization, recommended regulator settings, and pipe siz-ing is available from most regulator manufacturers andL.P./propane gas suppliers.FIRE OR EXPLOSION HAZARDFailure to follow the safety warning exactlycould result in serious injury, death or propertydamage.Never test for gas leaks with an open flame.use a commercially available soap solutionmade specifically for the detection of leaks tocheck all connections. A fire or explosion mayresult causing property damage, personalinjury or loss of life.FIGURE 4 - EXTERNAL SUPPLY CONNECTIONEXTERNAL SHUT-OFFFIGURE 5 - BOTTOM SUPPLY CONNECTIONEXTERNAL SHUT-OFF