Fujitsu AIRSTAGE J-IIIL Design & Technical Manual page 774

• Example 2:
– Individual connection
– Function setting for Fan setting when cooling thermostat off
Number 49-01 (Stop)
Forced thermostat off is one of the energy-saving functions. For example, when using ventilator at
condition of the outdoor temperature is lower than the indoor temperature, indoor unit of air condi-
tioner stops based on the received signal from external controller. (Cooling only)
Cooling operation
(Thermostat on)
[System diagram example]
Except Indoor unit
Except indoor unit and
and External wire
External wire (service
oo r unit E xte rn a l Inp u t
(service parts) are
parts) are procured at
re(S e rvice p arts)
procured at field.
field.
3-2. External input
Direct digital
controller
Thermistor
Ventilator
Thermistor
Indoor Outdoor
temperature temperature
88˚F
82˚F
(31˚C)
(28˚C)
External input wire
Indoor unit
Fan stop
(Thermostat off)
Relay
Indoor
temperature
88˚F
Ventilator
(31˚C)
- (08-20) -
Thermistor
Thermistor
Indoor Outdoor
temperature temperature
75˚C
82˚F
(24˚C)
(28˚C)
External controller
Outdoor
thermistor
Indoor
thermistor
Outdoor
temperature
82˚F
(28˚C)
3. Indoor unit