Unit installation

Installation - Electrical
SCXF-SVX01K-EN 43
Programmable Zone Sensors
A Check FilterTimer function is included. Filter service
countdown time can be set in one-day increments.
Activation of theTest/Configuration button located on the
bottom of the sensor performs a sensor self-diagnostic
routine and indicates hours in service.
When the BAYSENS119 is programmed for Constant
Volume or VAV control, Night Setback is initiated through
the scheduled Unoccupied time setting. When the sensor
switches to Night Setback, the outdoor dampers close and
heating/cooling functions are enabled/disabled based on
set up parameters. As building load changes, If heating/
cooling functions are enabled, the Sensor energizes self-
contained unit and evaporator fan operation.The unit will
cycle heating/cooling operation throughout the
Unoccupied period as required to maintain Unoccupied
space temperature setpoints. When the Unoccupied time
period has expired, all heating/cooling functions return to
normal operation.
When Night Setback options are used with VAV heating/
cooling, maintain airflow through the self-contained unit
by electronically tying the VAV terminals to the
unoccupied output relay contacts on the self-contained
units low voltage terminal board, or by using changeover
thermostats. Either of these methods will assure adequate
airflow through the unit and satisfactory temperature
control of the space.
Note: Refer to BAS-SVX17*-EN for complete Installation,
Operation, and Maintenance Instructions.
The BAYSENS119 programmable night set back sensor
provides multi functional flexibility for both Constant Volume
and Variable AirVolume control.This electronic programmable
sensor includes auto or manual cooling and heating
changeover with 7 day programming. Five tactile feel buttons
located on the sensor front panel provide interface for all
programming, including initial setup for CV or VAV control.
Sensor functionality includes up to four daily programmable
periods for Occupied/Unoccupied operation, and Override.The
dynamic LCD display indicates status for System On/Off, Heat,
Cool, Fan Status,Time of Day, Occupied/Unoccupied mode,
SpaceTemperature, Space or Discharge Air Heating and
Cooling Setpoints. Additional features include Service
Indication for Heat Failure, Cool Failure, Fan Failure, andTest
Mode if system is operating in test mode.
Figure 29. Zone sensor mounting hole locations for:
BAYSENS119
2.9 in (73.5 cm)
1.08 in (27.5 mm)
118.9 mm)
1.34 in (34.14 mm)
0.58 in (14.76 mm)
0.31 in (8 mm)
0.12 in (3 mm)
TYP R.07 in
(R1.80 mm)
3.39 in (86 mm)
0.24 in (6.00 mm)
2.62 in (66.5 mm)