RT-SVX23D-EN 9
General Information
Status Inputs (4 Wires Optional). The ZSM can be wired to receive four (4) operating status signals
from the RTRM (HEAT, COOL, SYSTEM “ON”, SER-VICE). Four (4) wires from the RTRM should be
connected to the appropriate terminals (7, 8, 9 & 10) on the ZSM.
Remote Zone Sensor (BAYSENS073*)
This electronic sensor features remote zone sensing and timed override with override cancellation.
It is used with a Trane Integrated ComfortTM building management system.
Remote Zone Sensor (BAYSENS074*)
This electronic sensor features single setpoint capability and timed override with override
cancellation. It is used with a Trane Integrated ComfortTM building management system.
Remote Zone Sensor (BAYSENS016A)
This bullet type temperature sensor can be used for; outside air (ambient) sensing, return air
temperature sensing, supply air temperature sensing, remote temperature sensing (uncovered.
Wiring procedures vary according to the particular application and equipment involved. Refer to
the unit’s wiring diagrams for proper connections.
Remote Zone Sensor (BAYSENS077*)
This electronic sensor can be used with BAYSENS106*, 108*, 110*, 119* Remote Panels. When this
sensor is wired to a BAYSENS119* Remote Panel, wiring must be 18 AWG Shielded Twisted Pair
(Belden 8760 or equivalent). Refer to the specific Remote Panel for wiring details.
High Temperature Sensor (BAYFRST001A)
This sensor connects to the RTRM Emergency Stop Input located on the LTB and provides high limit
“shutdown” of the unit and requires a manual reset. The sensor is used to detect high temperatures
due to fire in the air conditioning or ventilation ducts. The sensor is designed to mount directly to
the sheet metal duct. Each kit contains two sensors. The return air duct sensor (X1310004001) is
set to open at 135°F. The supply air duct sensor (X1310004002) is set to open at 240°F. The control
can be reset after the temperature has been lowered approximately 25°F below the cutout setpoint.
Evaporator Frost Control
This input incorporates the Frostat™ control (FOS) located on the indoor coil and can be activated
by closing a field supplied contact installed in parallel with the FOS.
If this circuit is open before the compressor is started, the compressor will not be allowed to
operate. Anytime this circuit is opened for 1 continuous second during compressor operation, the
compressor for that circuit is immediately turned “Off”. The compressor will not be allowed to
restart for a minimum of 3 minutes should the FOS close.
Smoke Detector Sensor (Optional)
This sensor is only applicable on units equipped with a RTOM. It provides high limit “shutdown”
of the unit and requires a manual reset. The sensor is used to detect smoke due to fire in the air
conditioning or ventilation ducts.
Note: Important! The supply and return air smoke detectors are designed to shut off the unit if
smoke is sensed in the supply air stream or return air stream. This function is performed
by sampling the airflow entering the unit at the return air opening. Follow the instructions
provided below to assure that the airflow through the unit is sufficient for adequate
sampling. Failure to follow these instructions will prevent the smoke detectors from
performing it's design function.
Note: Important! Airflow through the unit is affected by the amount of dirt and debris
accumulated on the indoor coil and filters. To insure that airflow through the unit is
adequate for proper sampling by the return air smoke detector, complete adherence to the
maintenance procedures, including recommended intervals between filter changes, and
coil cleaning is required.
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