York SUNLINE PLUS D2EG 048 Installation Instruction

Contents

GAS CONNECTIONThe gas supply line can be routed through the knockoutslocated on the front of the unit or through the opening providedin the unit's base. Refer to Figure 9 to locate these accessopenings. Typical supply piping arrangements are shown inFigures 4 and 5. All shaded items are field-supplied.Two grommets are shipped in the blower compartment (in partsbag taped to the blower housing) of every unit with gas heatand should be used in the knockouts when the gas pipingpenetrates the front of the unit.After the gas supply piping has been installed, the bottomopening should be sealed to prevent water from leaking into thebuilding.Gas piping recommendations:1. A drip leg and a ground joint union must be installed in thegas piping.2. When required by local codes, a manual shut-off valve mayhave to be installed outside of the unit.3. Use wrought iron or steel pipe for all gas lines. Pipecompound should be applied sparingly to male threadsonly.WARNING: Natural gas may contain some propane. Propane,being an excellent solvent, will quickly dissolvewhite lead or most standard commercial com-pounds. Therefore, a special pipe compound mustbe applied when wrought iron or steel pipe is used.Shellac base compounds such as Gaskolac orStalastic, and compounds such as Rectorseal #5,Cyde's or John Crane may be used.4. All piping should be cleaned of dirt and scale by hammeringon the outside of the pipe and blowing out the loose dirt andscale. Before initial start-up, be sure that all of the gas linesexternal to the unit have been purged of air.5. The gas supply should be a separate line and installed inaccordance with all safety codes as prescribed under“Limitations”. After the gas connections have beencompleted, open the main shut-off valve admitting normalgas pressure to the mains. Check all joints for leaks withsoap solution or other material suitable for the purpose.NEVER USE A FLAME.6. The furnace and its individual manual shut-off valve mustbe disconnected from the gas supply piping system duringany pressure testing of that system at test pressures inexcess of 1/2 psig (3.48kPa).The furnace must be isolated from the gas supply pipingsystem by closing its individual manual shut-off valveduring any pressure testing of the gas supply piping systemat test pressures equal to or less than 1/2 psig (3.48kPa).7. A 1/8 inch NPT plugged tapping, accessible for test gageconnection, must be installed immediately upstream of thegas supply connection to the furnace.L.P./PROPANE UNITS, TANKS AND PIPINGAll gas heat units are shipped from the factory equipped fornatural gas use only. The unit may be converted in the field foruse with L.P./propane gas with accessory kit model number1NP0434.All L.P./propane gas equipment must conform to the safetystandards of the National Fire Protection Association.For satisfactory operation, L.P./propane gas pressure must be10.5 inch W.C at the unit under full load. Maintaining proper gaspressure depends on three main factors:1. The vaporization rate which depends on (a) thetemperature of the liquid and (b) the “wetted surface” areaof the container or containers.2. The proper pressure regulation. (Two-stage regulation isrecommended from the standpoint of both cost andefficiency.)3. The pressure drop in the lines between regulators andbetween the second stage regualtor and the appliance.Pipe size required will depend on the length of the pipe runand the total load of all appliances.Complete information regarding tank sizing for vaporization,recommended regulator settings, and pipe sizing is availablefrom most regulator manufacturers and L.P./propane gassuppliers.L.P./propane gas is an excellent solvent and special pipecompound must be used when assembling piping for this gasas it will quickly dissolve white lead or most standardcommercial compounds. Shellac base compunds such asRectorseal #5 are satisfactory for this type of gas.Check all connections for leaks when piping is completed,using a soap solution. NEVER USE A FLAME.LOW NOx APPLICATIONFor natural gas heat installations in locations which require lowNitros Oxide emmissions, accessory model 1LN0404 must beinstalled.035-14832-003-A-02046 Unitary Products GroupFIG. 4 - EXTERNAL SUPPLY CONNECTIONEXTERNAL SHUT-OFFFIG. 5 - BOTTOM SUPPLY CONNECTIONEXTERNAL SHUT-OFF