York YAWS018 - 075 Installation Manual

York YAWS018 - 075 Installation Manual Manual pdf 13 page image

13Hydronic Section cont.CombinationUnitIf using a Geothermal Storage tank there will be two redwires exiting out of the top of the tank. These red wriesextend internally down to the thermistor/tank thermostatsection of the tank. Remove the bottom tank cover to exposethe red wires as well as the yellow tank thermistor wires.HydroZoneIf using HydroZone control, connect the two red wires tothe two yellow wires using wire nuts. Next, connect the twored wires from the top of the Geothermal Storage tank to“TS” and “GND” on the HydroZone. The “OAT” and “GND”terminals on the HydroZone are used for an outdoor airsensor.HydroStatIf using HydroStat control, connect the two red wires to theyellow wires using wire nuts. Next, connect the two red wiresfrom the top of the Geothermal Storage tank to “TS” and“GND” on the HydroStat. The “OAT” and “GND” terminalson the HydroStat are used to connect the controller to theELWT (Entering Load Water Temperature) well point sensor.This sensor is located on the load side entering water lineinside the unit.For other field installed controllers, these two red wireswill need wired to the appropriate sensor input terminals.Geothermal Storage Tank Thermostat and ThermistorThermistor Wires Connected to TS and GND onHydroZone Controller.Water-to-WaterLOAD PUMPHYDRONICLOADSource OUTP/T PortsP/T PortsBall ValveDielectricUnionsDielectricUnionsNOTES:* A 30 psi pressure relief valve (Part No: SRV30) should be used inhydronic applications.** Vent valve or P/T port at highest point in return line prior to ball valve.1-1/2 in.FPTExpansionTankAirVentPressureGauge30 psiRELIEF VALVEAirSeparatorFROMHWGTOHWGBack Flow Preventer /Pressure Relief ValveSource INGEOSTORAGETANKPUMPHOT(Piped inseries toan electricwater heater)COLDDOMESTICDip TubeBall ValveVent Valve/P/T Port**Another option for connection is to connect the thermostaton the Geothermal Storage tank directly to “R” and “Y1” onthe ABC board.Adequate rate of flow (GPM) is very important to systemperformance and long term reliability. Follow the guidelinesfor recommended flow in the recommendations table.AFFINITY SINGLE STAGE HYDRONIC INSTALLATION MANUAL