ENVISION SERIES INSTALLATION MANUAL
Water Piping
The proper water flow must be provided to each unit whenever the unit operates. To assure proper flow, use pressure/temperature ports to deter- mine the flow rate. These ports should be located at the supply and return water connections on the unit. The proper flow rate cannot be accurately set without measuring the water pressure drop through the refrigerant-to-water heat exchanger.
All source water connections on residential units are swivel piping fittings (see Figure 3) that accept 1-inch male pipe threads (MPT) . The swivel con- nector has a rubber gasket seal similar to a rubber hose gasket, which when mated to the flush end of any 1-inch threaded pipe provides a leak-free seal without the need for thread sealing tape or compound. Check to ensure that the rubber seal is in the swivel connector prior to attempting any connection. The rubber seals are shipped attached to the waterline. To make the connec- tion to a ground loop system, mate the brass connector (supplied in CK4L connector kit) against the rubber gasket in the swivel connector and thread the female locking ring onto the pipe threads, while maintaining the brass connector in the desired direction. Tighten the connectors by hand, then gen- tly snug the fitting with pliers to provide a leak-proof joint. When connecting to an open loop (ground water) system, thread the 1-inch MPT fitting (SCH80 PVC or copper) into the swivel connector and tighten in the same manner as noted above. The open and closed loop piping system should include pres- sure/temperature taps for serviceability.
Never use flexible hoses smaller than 1-inch inside diameter on the unit. Check carefully for water leaks.
Figure 3: Swivel Connections (Residential Units)
| Stainless | Locking |
| Steel | Ring |
| Snap Ring | |
| | Gasket |
| Gasket | Support |
| Sleeve |
| Material |
| |
Limit hose length to 10 feet per connection.
