General Information
10
RT-SVX46G-EN
sheet metal duct. Each kit contains two sensors. The return
air duct sensor (X1310004001) is set to open at 135ºF. The
supply air duct sensor (X1310004002) is set to open at
240ºF. The control can be reset after the temperature has
been lowered approximately 25ºF below the cutout
setpoint.
Human Interface - 5 Inch Color
Touchscreen (Optional)
Note:
For more information, see RT-SVX49*-EN.
The 5 inch color touchscreen human interface provides an
intuitive user interface to the rooftop unit that speeds up
unit commissioning, shortens unit troubleshooting times,
and enhances preventative maintenance measures. The
human interface includes several features including:
•
Data trending capabilities by means of time series
graphs
•
Historical alarm messages
•
Real-time sensor measurements
•
On board system setpoints
•
USB port that enables the downloading of component
runtime information as well as trended historical
sensor data
•
Customized reports
Low Pressure Control - ReliaTel™ Control
When the LPC is opened for 1 continuous second, the
compressor for that circuit is turned off immediately. The
compressor will not be allowed to restart for a minimum
of 3 minutes.
If four consecutive open conditions occur during an active
call for cooling, the compressor will be locked out, a
diagnostic communicated to ICS™, if applicable, and a
manual reset required to restart the compressor. On dual
compressor units only the affected compressor circuit is
locked out.
Multiple-Zone VAV Control
Multiple-zone VAV (MZVAV) control shall vary the speed
of the indoor fan to maintain the duct static pressure at a
setpoint. In cooling mode, the compressors shall be cycled
(or economizer modulated) to maintain the supply air
temperature (SAT) at the desired setpoint. In heating
mode, the indoor fan shall operate at maximum speed
whenever the heater is operating.
Phase Monitor
Note:
Not available on T/YZC072-120.
This sensor monitors voltage between the 3 conductors of
the 3 phase power supply. Two LED lights are provided:
•
The green light indicates that a balanced 3 phase
supply circuit is properly connected.
•
The red light indicates that unit operation has been
prevented. There are two conditions that will prevent
unit operation:
•
The power supply circuit is not balanced with the
proper phase sequence of L1, L2, L3 for the 3
conductors of a 3 phase circuit.
•
The line to line voltage is not between 180 volts and
633 volts.
Power Exhaust Control (Optional) - ReliaTel™
The power exhaust fan is started whenever the position of
the economizer dampers meets or exceed the power
exhaust setpoint when the indoor fan is on.
With the optional ventilation override accessory, the
power exhaust fan is independent of the indoor fan.
The power exhaust setpoint potentiometer is located on
the Reliatel Options Module (RTOM R-40) and must be set
while the indoor fan is at maximum speed. This is best
done while in test mode during 100% cooling or in any
stage of heat.
Programmable Zone Sensor - (BAYSENS119*)
This 7 day programmable sensor features 2, 3 or 4 periods
for Occupied or Unoccupied programming per day. If the
power is interrupted, the program is retained in
permanent memory. If power is off for an extended period
of time, only the clock and day may have to be reset.
The Zone Sensor allows selection of 2, 3 or 4 system
modes (Heat, Cool, Auto, and Off), two fan modes (On and
Auto). It has dual temperature selection with
programmable start time capability.
The occupied cooling set point ranges between 45 and 98
º F. The heating set point ranges between 43 and 96ºF.
A liquid crystal display (LCD) displays zone temperature,
temperature set points, day of the week, time, and
operational mode symbols.
The Option Menu is used to enable or disable applicable
functions, i.e.; Morning Warm-up, Economizer minimum
position override during unoccupied status, Fahrenheit or
Centigrade, Supply air tempering, Remote zone
temperature sensor, 12/24 hour time display, Smart fan,
and Computed recovery.
During an occupied period, an auxiliary relay rated for 1.25
amps @ 30 volts AC with one set of single pole double
throw contacts is activated.
RBCI - ReliaTel™ BACnet Communications
Interface (Optional)
This module is used when the application calls for an open
BACnet protocol. It allows the control and monitoring of
the system through an ICS panel. The module can be
ordered from the factory or as a kit to be field installed.
Follow the installation instructions that ships with each kit
when field installation is necessary.
Remote Zone Sensor (BAYSENS016*)
This bullet type temperature sensor can be used for
outside air (ambient) sensing, return air temperature
sensing, supply air temperature sensing, remote
