Fujitsu AIRSTAGE J-IIIL Design & Technical Manual page 476

• Single-stage cooling and heating with dedicated fan speed relays
*: Install the transformer as necessary, per building code and manufacturer's installation instruc-
tions. (Maximum power: 5.0 VA)
Terminal name
TC
C
TR
R
G3
G2
G1
Y2
Y1
W2
W1
G
NOTES:
• For remote controller cable, 2-wire type and 3-wire type are available depending on the device
to be connected.
• All wiring shown should be performed with 18 AWG thermostat wire.
• Terminals to thermostat controller on Thermostat convertor support AC 20 to 30 V.
• HIGH/MED/LOW fan signals are optional, and may not be available on all thermostat con-
trollers.
• Signals for stage 2 are optional. W2 and Y2 terminals may not be used in single-stage ther-
mostats. To use the stage 2 signals, turn on the DIP switch SET3-1 on each convertor.
• Up to 16 indoor units be controlled with a single thermostat controller. Multiple indoor units con-
nected to one Thermostat convertor are operable by the same operating setting.
• Two or more types of VRF system, single model, or multi systems cannot be mixed together.
3-5. Thermostat convertor (UTY-TTRX)
Thermostat controller
Fan
AC 24 V
Thermostat convertor
AC 24 V
Transformer*
(Locally purchased)
AC 208/230 V
Common (In) from transformer
Common to the thermostat controller
Power supply from transformer
Power supply to thermostat controller
Airflow Medium
Cooling stage 2
Cooling stage 1
Heating stage 2
Heating stage 1
- (05-138) -
Indoor unit
Max.
16 units
Application
Airflow High
Airflow Low
Fan
3. Adaptor/Convertor units