Alarm And Status Relay Outputs (Programmable Relays) - Optional; Emergency Stop; External Auto/Stop; Heating/Cooling Mode Setting - Trane RTXC-XE Series Installation, Operation And Maintenance Manual

Alarm and Status Relay Outputs (Programmable Relays) – Optional

Emergency Stop

External Auto/Stop

Heating/Cooling Mode Setting

RTXC-SVX003D-EN
The Symbio 800 system provides a programmable relay concept for enunciation of certain events
or states of the unit. Total four relays are provided (generally with a Quad Relay Output LLID) as
part of the Alarm Relay Output Option.
The list of events/states that can be assigned to the programmable relay LLID 121 can be found in
below table.
Events/States
This output is true whenever there is any active diagnostic that requires a manual reset
Alarm - Latching to clear, that affects the unit, or the Circuit. This classification does not include
informational diagnostics.
This output is true whenever there is any active diagnostic that could automatically
Alarm – Auto Reset clear, that affects the unit, or the Circuit. This classification does not include
informational diagnostics.
This output is true whenever there is any diagnostic affecting any component, whether
Alarm latching or automatically clearing. This classification does not include informational
diagnostics.
This output is true whenever the unit has been running in any unloading types of limit
Unit Limit Mode
modes continuously a certain time period (default is 10 minutes).
This output is true whenever the unit has reached maximum capacity for a certain time
Maximum Capacity period (default is 10 minutes); whenever the unit has quitted the maximum capacity for
a certain time period, this output is false.
Compressor Running This output is true whenever compressor is running on the unit.
This output is true whenever unit is running under heating mode (include warm up,
Heating/Cooling Mode
defrost); This output is false whenever chill is running under cooling mode.
Symbio 800 Service Tool (Tracer TU) is used to install the Alarm and Status Relay Option package
and assign any of the above list of events or status to each of the four relays provided with the
option.
The default assignments for the four available relays of the RTXC-XE/RTXC-XE-HSE Alarm and
Status Package Option are:
LLID Naming Assignment
Relay 1
Unit Status
Relay 2
Programmable
Relay 3
Relay
Relay 4
The relay will be energized when the event/state occurs.
Symbio 800 provides auxiliary control for a customer specified/installed latching trip out. When
this customer-furnished remote contact is provided, the unit will run normally when the contact is
closed. When the contact opens, the unit will trip on a manually resettable diagnostic. This
condition requires manual reset at theTD7 display. When this function is required, remove the
jumper W2, which is on terminal 1X5-40 and 1X5-41(XE unit)/ 1X5-50 and 1X5-51(XE-HSE unit),
then connect to the emergency stop device contact. Dry contact is acceptable only.
For Master-Slave unit, remove the jumpers W2, which are on Master section and Slave section
terminal 1X5-40 and 1X5-41(XE unit)/ 1X5-50 and 1X5-51(XE-HSE unit), then connect to the
emergency stop device contacts, the contacts shall derive single emergency stop switch.
If the unit requires the external Auto/Stop function, the installer must remove the jumper W1
which is on J2-1 and J2-2 of module 1A14, then connect to the remote contact. Dry contact is
acceptable only. The unit will run normally when the contacts are closed. When either contact
opens, the compressor(s), if operating, will go to the RUN: UNLOAD operating mode and cycle
off. Unit operation will be inhibited. Closure of the contacts will permit the unit to return to normal
operation. For Master-Slave unit, no action is needed for the Slave section.
The unit heating/cooling mode can be set by the "Setting" button of the display screen. Symbio
800 also provides auxiliary control for a running mode. Connect a remote device contact to the
J2-3 and J2-4 of module 1A19 can realize this function. Closure of the contact activates the
"Heating" mode, otherwise activates the "Cooling" mode. Dry contact is acceptable only. For
Master-Slave unit, no action is needed for the Slave section.
Description
Contact Terminal Default Setting
1A21, J2-10,11,12 Maximum Capacity
1A21, J2-7,8,9 Compressor Running
1A21, J2-4,5,6
1A21, J2-1,2,3
Alarm
Unit limit
35