Installation Electrical
RT-SVX34F-EN
33
all heating modes and unoccupied periods. The VHR
contacts are shown in the de-energized position and will
switch (energize) during the above mentioned operating
modes.
The following Variable Air Volume controls are
available from the factory for field installation
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
temperature sensing (uncovered), and for VAV zone reset.
Wiring procedures vary according to the particular
application and equipment involved. Refer to the unit
wiring diagrams, engineering bulletins, and/or any
specific instructions for connections. See Table 10 for the
Temp vs Resistance coefficient.
Remote Panel W/O NSB (BAYSENS021*)
This electronic sensor features two system switch settings
(Auto and Off), four system status LED's with single
setpoint capability. It can be used with a remote zone
temperature sensor BAYSENS077*.
The following Constant Volume or Variable Air
Volume (Traditional or Single Zone) controls
are available from the factory for field
installation.
Remote Zone Sensor (BAYSENS073*)
This electronic sensor features remote zone sensing and
timed override with override cancellation. It is used with a
Trane Integrated Comfort
TM
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 Comfort
TM
building management
system.
Figure 25.
VHR relay output
Table 15. Variable air volume mode operation
System Mode
Fan “Auto”
Fan “On”
Heat
DWU Active
DWU Off
DWU
2
Off
4
DWU
2
VAV Heating
4
Cool
VAV Cooling
1
VAV Cooling
1
Auto
DWU Active
DWU Off
DWU or
Cooling
1,2,3,4
VAV Cooling
1
DWU or
Cooling
1,2,3,4
VAV Cooling or
Heating
1
Off
Off
4
Off
4
Notes:
1.
If Cooling is selected the supply fan will run continuously. If VAV
Heating is activated the supply fan will run continuously.
2.
If Daytime Warmup is Activated, the supply fan will run
continuously.
3.
Auto changeover between Cooling and Daytime
Warmup depends upon the DWU initiate setpoint.
4.
The fan will be Off any time the system selection switch
is “Off”.
Heat mode/unoccupied mode relay output to VAV
Note:
Figure 26.
Remote panel W/O NSB (BAYSENS021*)
Figure 27.
Remote zone sensor (BAYSENS073*)
Figure 28.
Remote zone sensor (BAYSENS074*)
CUT RESISTOR R69 LOCATED ON RTAM NEAR SUPPLY AIR COOLING
SETPOINT POTENTIOMETER WHEN OPTIONAL REMOTE PANEL IS USED.
CUT WIRE JUMPER ADJACENT TO THE TERMINAL 1 ON ZONE SENSOR
WHEN OPTIONAL REMOTE SENSOR IS USED.
1
2
*
