Trane LPC, Инструкции по установке и эксплуатации

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62 LPC-SVX01C-EN
Operation
general
information
Zone sensors
The controller accepts the following zone
sensor inputs:
• Space temperature measurement
(10kW thermistor)
• Zone sensor setpoint thumbwheel
(either internal or external on the zone
sensor module)
• Fan mode switch
• Timed override On request
• Timed override Cancel request
• Communication jack
• Service pin message request
Space temperature measurement
Trane zone sensors use a 10k
Ω
thermistor to measure the space
temperature. Typically, zone sensors are
wall-mounted in the room and include a
space temperature thermistor. A valid
space temperature input is required for
the controller to operate in space
temperature control. If both a hard-wired
and communicated space temperature
value exist, the controller ignores the
hard-wired space temperature input and
uses the communicated value.
Zone sensor setpoint thumbwheel
Zone sensors with an internal or external
setpoint thumbwheel (1k
Ω
) provide the
Tracer AH540/541 controller with a local
setpoint (50ºF to 85ºF [10ºC to 29.4ºC]). An
internal setpoint thumbwheel is
concealed under the front cover of the
zone sensor. To access it, remove the zone
sensor cover. An external setpoint
thumbwheel (when present) is accessible
from the front cover of the zone sensor.
See “Zone sensor setpoint thumb wheel”
section for an explanation of how the
controller determines the setpoint.
Fan mode switch
The zone sensor fan mode switch
provides the controller with a fan request
signal (Off, Auto). If the fan control request
is communicated to the controller, the
controller ignores the hard-wired fan
mode switch input and uses the
communicated value. The zone sensor
fan mode switch input can be enabled or
disabled through configuration using the
Rover service tool. If the zone sensor
switch is disabled, the controller resorts to
the Auto fan mode.
When the fan mode switch is placed in
the Off position, the controller does not
control any unit capacity. The unit remains
powered and all outputs are driven
Closed or Off.
Upon a loss of signal on the fan speed
input, the controller reports a diagnostic
and reverts to using the Auto fan mode of
operation.
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 controller in override
(occupied bypass mode) and to cancel
the override request.
The controller always recognizes the
timed override ON button. If someone
presses the zone sensor timed override
ON button, the controller initializes 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 controller 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 unoccupied (perhaps due to a change
based on the system time-of-day
schedule), 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 modules)
as the connection point from the Rover
service tool to the communication
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
• 5: Communications
• 6: Communications
Typical Trane zone sensor wiring connec-
tions
without a fan mode switch are as
follows:
• 1: Space temperature
• 2: Common
• 3: Setpoint
• 5: Communications
• 6: Communications