Fujitsu AIRSTAGE J-IIIL Design & Technical Manual page 772

[System diagram example]
Except indoor unit and
External wire (service
parts) are procured at
field.
[Operation status]
Signal detected by
external controller
Command from
external controller
Normal means that the indoor unit continues appropriate operation until Forced thermostat off sig-
nal is received, at condition which are set by central and individual controller or detected by ther-
mo sensors of the indoor unit.
3-2. External input
External input wire
Indoor unit
Outdoor temp. < Indoor temp.: On
Outdoor temp. > Indoor temp.: Off
Forced thermostat off
Normal
EEV
Indoor unit
Fan
- (08-18) -
Relay
Indoor
thermistor
Indoor
temperature
88˚F
Damper motor
(31˚C)
Open
Close
On
Off
External controller
Outdoor
thermistor
Outdoor
temperature
82˚F
(28˚C)
3. Indoor unit