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8
ENVISION SERIES INSTALLATION MANUAL
Water Piping
The proper water ow must be provided to each unit whenever the unit
operates. To assure proper ow, use pressure/temperature ports to deter-
mine the ow rate. These ports should be located at the supply and return
water connections on the unit. The proper ow 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 ttings
(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 ush 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 tting with pliers to provide a leak-proof joint. When connecting
to an open loop (ground water) system, thread the 1-inch MPT tting (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 exible hoses smaller than 1-inch inside diameter on the unit. Limit hose length to 10 feet per connection.
Check carefully for water leaks.
Locking
Ring
Stainless
Steel
Snap Ring
Gasket
Support
Sleeve
Gasket
Material
Figure 3: Swivel Connections
(Residential Units)