York YAZS022 Installation Manual

York YAZS022 Installation Manual Manual pdf 8 page image

8Water PipingThe proper water flow must be provided to each unit whenever theunit operates. To assure proper flow, use pressure/temperatureports to determine the flow rate. These ports should be located atthe supply and return water connections on the unit. The properflow rate cannot be accurately set without measuring the waterpressure drop through the refrigerant-to-water heat exchanger.All source water connections on residential units are swivel pipingfittings (see Figure 3) that accept 1 in. male pipe threads (MPT).The swivel connector has a rubber gasket seal similar to a rubberhose gasket, which when mated to the flush end of any 1 in.threaded pipe provides a leak-free seal without the need for threadsealing tape or compound. Check to ensure that the rubber sealis in the swivel connector prior to attempting any connection. Therubber seals are shipped attached to the waterline. To make theconnection to a ground loop system, mate the brass connector(supplied in CK4L connector kit) against the rubber gasket in theswivel connector and thread the female locking ring onto the pipethreads, while maintaining the brass connector in the desireddirection. Tighten the connectors by hand, then gently snug thefitting with pliers to provide a leak-proof joint. When connecting toan open loop (ground water) system, thread the 1 in. MPT fitting(SCH80 PVC or copper) into the swivel connector and tighten inthe same manner as noted above. The open and closed loop pipingsystem should include pressure/temperature taps for serviceability.LockingRingStainlessSteelSnap RingGasketSupportSleeveGasketMaterialFigure 3: Swivel Connections(Residential Units)General Installation Information cont.Never use flexible hoses smaller than 1 in. inside diameter on theunit. Limit hose length to 10 ft. per connection. Check carefully forwater leaks.AFFINITY INDOOR SPLIT SERIES INSTALLATION MANUAL