Trane THS04 User Manual

RT-SVU010B-GB

User Guide

THS04 wall thermostat

1. Wiring

Please refer to wiring diagram for details

a. Bus

Communication between CH536 and THS04 is done by Modbus on RS485.
On CH536 a bus is dedicated to that communication: J9 FBus1
This is based on three wires: plus ; minus ; reference (circle)
Vout is not used. (cf Figure.1)

Figure 1

On THS04, those three signals are: Rx+/Tx+ ; Rx-/Tx- ; GND (cf Figure.2)

Figure 2

b. Power supply

In addition to communication signals, THS04 requires power supply.
X201 to be connected to GND of THS04
X200 to be connected to 24V~ of THS04

2. Display

Figure 3
Display is splitted in different areas, providing information about:

1. Unit mode (Heat, Cool, Auto). We can have combination of symbols Auto+Cool or Auto+Heat
indicating the actual running status

2. Zone Temperature

3. Fan mode (On, Auto).

4. Fan speed (min, intermediate, nominal)

6. Key on: logged as user

7. Set on: modification of temperature setpoint (will be taken in account when Set switches off)

9. Occupancy of current Timeband (scheduler)

10. Current day

11. Unit status: Alarm, Compressors On/Off, Indoor Fans On/Off, Auxiliary Heating On/Off

12. “hh:mm” (time) if unit is in local control.
“BAS” if unit is controlled by BAS.
“Off” if unit is switched off

13. Occupancy override