JOHNSON CONTROLS
162
FORM 150.67-NM2 (209)
Unit Operation
When a fan stage is turned off (programmed on pressure
minus programmed differential), the off pressure for the
next stage is decreased 20 PSIG and ramped back to the
programmed off pressure minus the differential over the
next 20 seconds.
A low ambient kit MUST be installed
when “AMBIENT CONTROL LOW
AMBIENT” is selected under the OP-
TIONS key.
Compressor damage could occur if
programming does not match installed
hardware.
Detailed Standard Fan Control operation is shown in
Table 19 and 20.
Summary of Contents for YCAL0019
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