York YAZS022 Installation Manual

York YAZS022 Installation Manual Manual pdf 11 page image

11Figure 6: Typical Split System Application Open Loop -Well WaterOpen Loop - Well Water SystemsTypical open loop piping is shown below. Always maintainwater pressure in the heat exchanger by placing water controlvalves at the outlet of the unit to prevent mineral precipitation.Use a closed, bladder-type expansion tank to minimize mineralformation due to air exposure. Ensure proper water flow throughthe unit by checking pressure drop across the heat exchangerand comparing it to the figures in unit capacity data tables in thespecification catalog. 1.5-2 gpm of flow per ton of cooling capacityis recommended in open loop applications.Discharge water from the unit is not contaminated in any mannerand can be disposed of in various ways, depending on local codes,Figure 7c: Open Loop Solenoid Valve Connection OptionTypical slow operating external 24V water solenoid valve(type VM) wiring.Figure 7a: Open Loop Solenoid Valve Connection OptionTypical quick operating external 24V water solenoid valve(type PPV100 or BPV100) wiring.NOTE: SW2-4 and SW2-5 should be “OFF” to cycle withthe compressor.i.e. recharge well, storm sewer, drain field, adjacent stream orpond, etc. Most local codes forbid the use of sanitary sewer fordisposal. Consult your local building and zoning departments toassure compliance in your area.NOTE: For open loop/groundwater systems or systems that do notcontain an antifreeze solution, set SW2-Switch #1 to the “WELL”(30°F) position. (Refer to the DIP Switch Settings table in theAurora Control section.) Slow opening/closing solenoid valves(type V or VM) are recommended to eliminate water hammer.Acc ComAcc NCAcc NO123CR P1P2SVSolenoidValveABC BoardNOTE: SW2-4 should be “ON” and SW2-5 should be “OFF” whenusing a slow opening (V or VM) water valve.CRAcc ComACC NCAcc NOVM ValveABC BoardFigure 7b: Open Loop Solenoid Valve Connection OptionTypical slow operating external 24V water solenoid valve(type V) wiring.CRAcc ComACC NCAcc NOCW/YV Valve ABC BoardVibration Absorbing Pad or Air Pad P/T PlugsDisconnectThermostat WireFrom Air HandlerBoiler Drains forSystem FlushingWater SolenoidControl ValveRubber BladderPressure TankLinesetTo Air HandlerFlowRegulatorShut-Of f ValvesWater OutWater InFrom W ellAFFINITY INDOOR SPLIT SERIES INSTALLATION MANUAL