Generic Binary Input; Supply Fan Status; Filter Status - Trane Tracer AH.540 Installation Owner Diagnostics

14
Binary inputs

Generic binary input

Binary input IN 9 can be configured as a generic binary input for a variety of
applications with Trane Tracer Summit
controller operation. Binary input IN 9 can be configured as Occupancy or
Generic. A generic binary input can be monitored only from Tracer Summit.

Supply fan status

The fan status binary input IN 10 indicates the presence of air flow through the
supply fan of an air handling unit. For Tracer
pressure switch detects fan status, with the high side of the differential being
supplied at the unit outlet and the low side supplied inside the unit. During fan
operation, differential pressure closes the normally open switch and confirms
that the fan is operating properly.
A Low Supply Fan Air Flow diagnostic is detected during the following two
conditions:
• The controller is commanding the fan On and the fan status switch is not in
the closed position
• The fan status switch does not close the binary input within the configurable
fan On delay time limit of the controller commanding the fan On
This is a latching diagnostic and discontinues unit operation until the diagnostic
is cleared from the controller. Additional details can be found in the
Troubleshooting section.
Table 14 — Fan status binary input IN 10 configuration
IN 10 configuration Contact closed
Not used Normal
Normally closed Latching diagnostic (Note 1)
Normally open Normal
Note 1: A Low Supply Fan Air Flow diagnostic is generated when the controller turns on the supply fan output, but the
supply fan status binary input indicates the supply fan is not running after the configurable fan delay time.

Filter status

The filter status switch connected to binary input IN 11 detects a dirty air filter
and indicates a need for maintenance. For Tracer AH.540 applications, a
differential pressure switch detects filter status, with the high side of the
differential being supplied at the filter inlet and the low side supplied at the filter
outlet. During fan operation, filter differential pressure increases as the filter
becomes increasingly dirty.
A normally open filter status switch closes when the differential pressure
reaches a set threshold. This is a non-latching, informational diagnostic and the
controller will continue normal unit operation.
Table 15 — Filter status configuration
IN 11 configuration Contact closed
Not used Clean
Normally closed Clean
Normally open Dirty
™
only. The binary input does not affect
™
AH.540 applications, a differential
Contact open
Normal
Normal
Latching diagnostic (Note 1)
Contact open
Clean
Dirty
Clean
CNT-SVX05A-EN