Filter
Top Products
RT-PRC031-EN 19
Controls VAV and CV
8. Supply Air Static Pressure
Setpoint
9. Minimum Outside Air Flow
Setpoint
10. Morning Warm Up Setpoint
11. Economizer Dry Bulb Enable
Setpoint
12. Supply Air Reheat Setpoint
13. Minimum Outside Air Position
Setpoint
14. Occupied Dehumidification
Setpoint
15. Unoccupied Dehumidification
Setpoint
16. Occupied Humidification
Setpoint
17. Unoccupied Humidification
Setpoint
Binary Outputs - each of the five (5)
relay outputs can be mapped to any/
all of the available diagnostics.
Binary Input - the single binary input
can initiate or terminate the Demand
Limit mode of operation via a field
supplied switch or contact closure.
Generic Building Automation
System Module (GBAS 0-10
vdc)
The Generic Building Automation
System Module (GBAS 0-10vdc) is
used to provide broad control
capabilities for building automation
systems other than Trane's Tracer™
system. The following inputs and
outputs are provided:
Analog Inputs—Four analog inputs,
controlled via a field provided
potentiometer or a 0-10 vdc signal,
that can be configured to be any of
the following:
1. Occupied Zone Cooling Setpoint
(CV only)
2. Unoccupied Zone Cooling
Setpoint (CV only)
3. Occupied Zone Heating Setpoint
(CV only)
4. Unoccupied Zone Heating
Setpoint (CV only)
5. Supply Air Cooling Setpoint (VAV
only)
6. Supply Air Heating Setpoint (VAV
only)
7. Space Static Pressure Setpoint
8. Supply Air Static Pressure
Setpoint
9. Minimum Outside Air Flow
Setpoint
10. Morning Warm Up Setpoint
11. Economizer Dry Bulb Enable
Setpoint
12. Supply Air Reheat Setpoint
13. Minimum Outside Air Position
Setpoint
14. Occupied Dehumidification
Setpoint
15. Unoccupied Dehumidification
Setpoint
16. Occupied Humidification
Setpoint
17. Unoccupied Humidification
Setpoint
Analog Outputs—Four analog
outputs that can be configured to be
any of the following:
1. Outdoor Air Temperature
2. Zone Temperature
3. Supply Air Temperature (VAV
only)
4. Supply Air Pressure (VAV only)
5. Space Pressure
6. Space Relative Humidity
7. Outdoor Air Relative Humidity
8. Space CO
2
Level
9. Heat Staging (%)
10. Outdoor Air Damper Position
11. Outdoor Airflow
Binary Output - the single relay
output can be mapped to any/all of
the available diagnostics.
Binary Input - the single binary input
can initiate or terminate the Demand
Limit mode of operation, via a field
supplied switch or contact closure.
Chilled Water Coil - Freeze
Stat
A low limit thermostat, mounted on
the entering air side of the coil, is
used to help prevent the chilled water
coil from freezing during periods of
low ambient temperature. If the
temperature falls below a
predetermined value the low limit
thermostat will trip, the hydronic
valve will be fully opened, the supply
fan will shut off, and the fresh air
dampers will close.
Steam and Hot Water Coil -
Freeze Avoidance
Freeze Avoidance is a feature which
helps prevent freezing of steam or
hot water heat coils during periods of
unit inactivity and low ambient
temperatures. Whenever the unit
supply fan is off, the outdoor air
temperature is monitored. If the
temperature falls below a
predetermined value, the heating
valve is opened to a position selected
at the unit mounted Human Interface
to allow a minimum amount of
steam or hot water to flow through
the coil and avoid freezing
conditions.
Applications with Chilled
Water Coil
Occupied/Unoccupied
Switching
Description - 3 ways to switch
Occupied/Unoccupied:
1. Night Setback (NSB) Panel
2. Field-supplied contact closure
(hard wired binary input to RTM)
3. TRACER (or 3rd Party BAS with
LCI module)
Night Setback Sensors
Trane's night setback sensors are
programmable with a time clock
function that provides
communication to the air handler
unit through a 2-wire
communications link. The desired
transition times are programmed at
the night setback sensor and
communicated to the air handler.
Night setback (unoccupied mode) is
operated through the time clock
provided in the sensors with night
setback. When the time clock
switches to night setback operation,
the outdoor air dampers close and
heating/cooling can be enabled or
disabled depending on setup
parameters.
As the building load changes, the
night setback sensor energizes the air
handler heating/cooling (if enabled)