Honeywell EXCEL 5000 User Manual page 276

APPENDIX B: STARTUP USER ADDRESS
Upper Left Switching Table
74-5577–33 (US)
EN2B-0184 GE51 R0518 (Europe)
1 again when the switch-on delay expires for the first time. It remains zero (only the
controller can still activate STARTUP).
The first ventilator stage switches on according to the table at the upper left of the
previous diagram:
The first stage switches on when:
The second ventilator stage is off for 90 seconds.
This long (90-second) time delay prevents the first stage from immediately
switching on when the second stage switches back to the first stage. This
delay is necessary to protect the drive belt. The length of the time delay
depends on the inertia of the ventilator (see the technical description for the
specific model of ventilator for inertia data).
AND
The Time Program (or application program) requests the first stage.
AND
The negative cycle transition from STARTUP occurred at least 60 seconds
before (that is, STARTUP must be zero for a minimum of 60 seconds)
OR
The second ventilator stage was off for 90 seconds.
The amount of time depends on the technical specifications of the ventilator.
AND
The Time Program (or application program) does not request the first stage.
AND
The Time Program (or application program) requests the second stage.
This condition initially switches the first stage on although the Time Program
may already request the second stage.
AND
The negative cycle transition from STARTUP occurred at least 60 seconds
before (that is, STARTUP must be zero for a minimum of 60 seconds).
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EXCEL CARE CONTROL ICONS