REFRIGERANT PIPING INSTALLATION SECTION
S1CA
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Refer to Refrigerant
Charge Table for
specified line charge.
Note: Charging should be done with a
9.Once certain of a good evacuation and leak free joints,
10.Charge to proper weight, charge based on feet of interconnect (table on next page)
S1CA
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11.Refer to Field Charging Charts to “fine tune” the refrigerant charge to meet your conditions.
S2CA
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The units are delivered precharged with refrigerant for the condenser coil and the evaporator. Charging of the field installed piping is required. Refer to the refrigerant charge table for the proper amount to be added for the applications interconect pip- ing. Unit service valves are solid brass, for sweat connections.
IMPORTANT: All systems require field charge adjustments. Refer to the "Refrig- erant Charge Tables" for proper weight charge and to the supplied “Field Charging Charts" for proper system pressures and temperature at different outdoor condi- tions. Superheat should be used for final system charge in cooling mode. Subcool should be used for final system charge in heating mode.
RECAP OF COMPLETING
PIPING CONNECTIONS
Pressure test all field installed piping and the indoor air handler with nitrogen. Using a suitable vacuum pump, evacuate the tubing and indoor unit to 500 microns or less, with service values remaining front seated (closed).
Before releasing the refrigerant from the condenser, be sure the manifold gauge set is closed so as not to lose vacuum when shutting down the pump.
Release refrigerant from the condensing unit by back seating the service value. Al- len wrenches are used to open the valve. Replace valve caps. Be Careful to not back seat the valves past the snap flanges that hold the valve core in place.
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