NS SPLIT INSTALLATION MANUAL
Water Piping
Residential NS split units are supplied standard with brass water connections which will connect to flow center.
CAUTION: Never use flexible hoses smaller than
CAUTION: Water piping exposed to outside temperatures may be subject to freezing.
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 determine 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
Closed Loop - Earth coupled Systems (Outdoor Installations)
Locate unit on an air pad with access hole as shown below. When mounting on an existing concrete pad, holes must be bored through to accommodate 1
Connecting To Earth Loop
The earth loop trench should be continued directly under the unit as shown in Figure 3. Make the connections to op- tional fittings from the loop circulator pump(s) and insure proper backfill to support the loop pipe during trench settling. All 1
IMPORTANT - A freeze protection thermostat is installed in the unit to automatically start loop circulator pump if loop temperature drops below 20°F. Loop freeze protection should also be maintained to the lowest temperature the insulated loop may encounter in the case of power failure.
Flow Center Installation
Flow centers
NOTE: For ease of installation, attach provided hoses to coax first and then trim to fit to elbows on flow center.
Figure 3: Typical Split System Outdoor Installation Using Closed Loop
Loop Supply
and Return
Piping