22
SSP-SVX001B-EN
Refrigerant Charging Procedure
If charging by weight, refer to “Charging Levels,” p. 23
for starting change. If refrigerant adjustments are
needed because of length of line, refer to the Charging
Charts and Superheat values available on unit access
panels.
Refer to Wiring Matrix and Device Location Matrix for
list of charging charts and super heat tables available in
e-Library. Charge by weight through the gauge port on
the liquid line.
NNootteess::
• Refrigerant should only be charged in the
liquid state.
• When possible, always charge the
refrigerant into the liquid line of the unit.
• If the entire charge can’t be charged into the
liquid line, the balance of the unit charge
can be metered through a charging
manifold set as liquid — preferably through
a schrader valve into the suction line to the
compressor — only while the compressor is
running.
• Check and adjust superheat using the
superheat table, then re-check charging
charts to determine if charge corrections are
necessary. Refer to Charging Data for list of
super heat tables available in e-Library.
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Figure 13. Outdoor units - refrigerant piping
Gas Line Gauge Port
Liquid Line Gauge Port
Manfold
Guages
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