Installation
RT-SVX24J-EN 83
Remote Minimum Position Potentiometer
(BAYSTAT023*)
The remote minimum position potentiometer is used on
units with an economizer. It allows the operator to
remotely set the economizer minimum position (which
controls the amount of outside air entering the unit). Use
the installation instructions that shipped with the
potentiometer to install it, and the appropriate illustrations
beginning with Figure 57, p. 87 to connect it to the unit.
Single Zone Variable Air Volume & Rapid
Restart System Control
Remote Zone Sensor (BAYSENS016*)
This bullet-type, analog temperature sensor can be used
for supply air and return air temperature sensing. Wiring
procedures vary according to application and equipment.
When this sensor is wired to a BAYSENS119* Remote
Panel, wiring must be 18 AWG Shielded Twisted Pair
(Belden 8760 or equivalent). Refer to Table 34, p. 85 for the
Temperature vs. Resistance coefficient.
External Auto/Stop Switch
A field supplied single pole single throw switch may be
used to shut down the unit operation.This switch is a
binary input wired to the RTM. When opened, the unit
shuts down immediately and can be cancelled by closing
the switch. Refer to the appropriate illustrations beginning
with Figure 57, p. 87 for the proper connection terminals in
the unit control panel.The switch must be rated for 12 ma
@ 24 VDC minimum.
Emergency Override
When a Lontalk®/BACnet® communication module is
installed, the user can initiate from theTraneTracer
Summit or 3rd party BAS one of five (5) predefined, not
available to configure, Emergency Override sequences.All
compressors, condenser fans and the Humidification
output are deenergized for any Emergency Override
sequence. Each Emergency Override sequence
commands the unit operation as follows:
1. PRESSURIZE_EMERG:
– Supply Fan - On
– Supply Fan VFD Open/Max (if so equipped)
– Exhaust Fan - Off; Exhaust Dampers Closed (if so
equipped)
– OA Dampers - Open; Return Damper - Closed
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Energized
– VOM Relay - Energized (if so equipped)
– Preheat Output - Off
– Return Fan - Off; Exhaust Dampers - Closed (if so
equipped)
– Return VFD - Min (if so equipped)
2. EMERG_DEPRESSURIZE:
– Supply Fan - Off
– Supply Fan VFD
- Closed/Min (if so equipped)
– Exhaust Fan - On; Exhaust Dampers Open/Max (if
so equipped)
– OA Dampers - Closed; Return Damper - Open
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Energized
– VOM Relay - Energized (if so equipped)
– Preheat Output - Off
– Return Fan - On; Exhaust Dampers - Open (if so
equipped)
– Return VFD - Max (if so equipped)
3. EMERG_PURGE:
– Supply Fan - On
–
Supply Fan VFD
- Open/Max (if so equipped)
– Exhaust Fan - On; Exhaust Dampers Open (if so
equipped)
– OA Dampers - Open; Return Damper - Closed
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Energized
– VOM Relay - Energized (if so equipped)
– Preheat Output - Off
– Return Fan - On; Exhaust Dampers - Open (if so
equipped)
– Return VFD - Max (if so equipped)
4. EMERG_SHUTDOWN:
– Supply Fan - Off
–
Supply Fan VFD
- Closed/Min (if so equipped)
– Exhaust Fan - Off; Exhaust Dampers Closed (if so
equipped)
– OA Dampers - Closed; Return Damper - Open
– Heat - All heat stages off; Mod Heat output at 0 VDC
– Occupied/Unoccupied/VAV box output - Energized
– VOM Relay - Energized (if so equipped)
– Preheat Output - Off
– Return Fan - Off; Exhaust Dampers - Closed (if so
equipped)
– Return VFD - Min (if so equipped)
5. EMERG_FIRE - Input from fire pull box/system:
– Supply Fan - Off
–
Supply Fan VFD
- Closed/Min (if so equipped)
– Exhaust Fan - Off; Exhaust Dampers Closed (if so
equipped)
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