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Manual

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Only clean ACR tubing should be used.
Piping should conform to generally accepted
practices and codes.
The air handling unit coils are pressurized.
The copper caps must be punctured to
permit a gradual escape of the pressure prior
to un-sweating those caps. Immediately
couple the tubing to the indoor unit to avoid
exposing the coils to moisture. A properly
sized filter drier is furnished in the
condenser. When making solder
connections, make sure dry nitrogen flows
through the lines, when heating the copper,
to prevent oxidization inside of the copper.
When piping is completed
interconnecting piping and air handling
unit must be evacuated to 500 microns or
less and leak checked. Condenser shutoff
valves can then be opened to allow
refrigerant to flow to the air handling unit.
Thermal expansion valve bulbs should be
mounted with good thermal contact on a
horizontal section of the suction line close to
the evaporator, but outside the cabinet, and
well insulated.
Figure 9 - TXV Bulb Position
Refrigerant lines should be fastened and
supported according to local codes.
Unit should be charged based on
determination of sub-cooling and superheat.
See Adjusting Refrigerant Charge section
for more information.
Refrigerant reheat coil for the modulating
hot gas reheat option is factory installed.
Liquid line receiver should be installed at
the condensing unit. Care must be taken not
to cross circuits in reheat systems.