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Service Reference Manual SEQUENCE OF OPERATIONS
2-37
SRM-HW/HWC 2/99
HWC123,183, 243, 303
Low Ambient Model
Refer to Figure 2-7
The low ambient switch is designed to allow the opera-
tion of the air conditioning unit below the normal operat-
ing range. On units equipped with this switch, sequence
of operation during a cooling call is modified when
outdoor temperatures fall below the normal operating
range.
The switch will interrupt the operation of the outdoor
cooling fan when the temperature of the liquid line
coming in from the outdoor coil falls below 55° F. When
the temperature of the liquid line rises to 95° F, the
switch will close and the outdoor fan will resume opera-
tion.
The low ambient switch does not affect any other facet
of the operation of the unit.
To see simplified and detailed sequences of operation
for the HWC123, 183, 243, 303 models, refer to pages
2-5 to 2-9.