GE AZ85E09DAC Technical Service Manual page 18

Motion Sensor (kit)
The motion sensor has a 2-wire circuit that is
connected to the main board terminal strip. The
motion sensor is an electronic sensor that, when
motion is sensed, closes a switch (internal to the
sensor), completing the motion sensor circuit.
After the Energy Management System has seen
the door sensor circuit closed (door opened), it
will check the motion sensor circuit. If the Energy
Management System sees the motion sensor
circuit closed (no motion detected by the sensor),
it will then check the temperature being reported
by the room air sensor. If the Energy Management
System sees the motion sensor circuit open (motion
detected by sensor), the unit will continue to be
thermostat-controlled.
Note: The Energy Management System is
dependent on the Room Air Sensor, Motion Sensor,
and Door Sensor. If the Room Air Sensor, Motion
Sensor, and Door Sensor are not all installed, the
Energy Management System will not operate.
Room Air Sensor (kit)
The room air sensor is a thermistor with a negative
coeffi cient (as temperature rises, resistance goes
down). The sensor has a 2-wire circuit that is
connected to the main board terminal strip.
The room air sensor is used for Temperature
Limiting and for the Energy Management System.
When the Energy Management System sees the
door sensor circuit close and then the motion
sensor circuit close (room unoccupied), the Energy
Management System will ignore the thermostat
and check the temperature reported by the room
air sensor. Based on the input from the room air
sensor, the Energy Management System will allow
the temperature of the room to lower to 68°F (heat
mode) or raise to 78°F (cool mode).
Note: The Energy Management System is
dependent on the Room Air Sensor, Motion Sensor,
and Door Sensor. If the Room Air Sensor, Motion
Sensor, and Door Sensor are not installed, the
Energy Management System will not operate.
0RWLRQ
6HQVRU
NO MOTION = SENSOR (SWITCH) CLOSED
MOTION = SENSOR (SWITCH) OPEN
MAIN BOARD OUTPUT TO
MOTION SENSOR = 24 VAC
5RRP $LU 6HQVRU
MAIN BOARD OUTPUT TO
ROOM AIR SENSOR = 5 VDC
R o
R e s
e T m p e
3 2
6 8
7 7
8 6
9 5
– 18 –
o m A r i S e n s r o
s i a t n c e V a u l e s
a r u t e r R e s s i a t c n e
Ω
F ° 6 0 k
Ω
F ° 2 0 k
Ω
F ° 1 0 k
9 Ω
F ° k
8 Ω
F ° k