Salus ST100ZB - Accessory Function

8-4
Module 5 – Connected Fan Coil Controls
Operation
Section 8
Accessory Function
Terminals Ac1 and Ac2 on the Fan Coil Thermostat provide output to an accessory such as a Humidier,
Dehumidier, Heat Recovery Ventilator (HRV) or Energy Recovery Ventilator (ERV). The built-in humidity
monitor continually samples humidity at the thermostat and will operate a humidier or dehumidier to
maintain the specied value. The following table shows the function of the accessory output depending on
which accessory is selected under parameter 22 (See Appendix A).
Parameter P22 Setting Operation of Ac1/Ac2 dry contacts
0 (No Function) Open
1 (Humidifier)
Closed when humidity is at
or below the set point
Open when the humidity
exceeds the set point
2 (Dehumidifier)
Closed when humidity is at
or above the set point
Open when the humidity is
less than the set point
3 (ERV/HRV) Closed when fan relay is on Open when fan relay is off
The icon is displayed when the Ac1/Ac2 dry contacts are closed.