Trane Tracer AH540 User Manual

Zone sensors
CNT-SVX05B-EN 29
ON/CANCEL buttons
Some Trane zone sensor modules include timed override ON and CANCEL
buttons. Use the timed override
ON and CANCEL buttons to place the con-
troller in override (occupied bypass mode) and to cancel the override
request.
The controller always recognizes the timed override
ON button. If some-
one presses the zone sensor timed override
ON button, the controller ini-
tializes the bypass timer to 120 minutes (adjustable).
If the controller is unoccupied when someone presses the
ON button for
two seconds, the controller immediately changes to occupied bypass mode
and remains in the mode until either the timer expires or someone
presses the zone sensor’s timed override
CANCEL button. If the ON button
is pressed during occupied bypass mode before the timer expires, the con-
troller re-initializes the bypass timer to 120 minutes.
If the controller is in any mode other than unoccupied when someone
presses the
ON button, the controller initializes the bypass time to
120 minutes. As time expires, the bypass timer continues to decrement.
During this time, if the controller changes from its current mode to unoc-
cupied (perhaps due to a change based on the system time-of-day sched-
ule), the controller switches to occupied bypass mode for the remainder of
the bypass time or until someone presses the zone sensor timed override
CANCEL button.
Zone sensor communication jack
Use the RJ-11 communication jack (present on some zone sensor mod-
ules) as the connection point from the Rover service tool to the communi-
cation link when the communication jack is wired to the communication
link at the controller. By accessing the communication jack via Rover, you
gain communication access to any controller on the link.
Service Pin message request
Pressing the zone sensor ON button for ten seconds and then releasing it
causes the controller to transmit a Service Pin message. The Service Pin
message can be useful for installing the controller on a communication
network. (See the Rover Operation and Programming guide,
EMTX-SVX01E-EN, for more information).
Zone sensor wiring connections
Typical Trane zone sensor wiring connections with a fan mode switch are
as follows:
• 1: Space temperature
• 2: Common
• 3: Setpoint
• 4: Fan mode

Trane Tracer AH540 Specifications

General

Brand	Trane
Model	Tracer AH540
Category	Controller
Language	English