Auxiliary Relays
The Auxiliary relays (A1 and A2) can be used to control equipment such as opening and closing vent dampers
or switching on or o
ff
a humidifier or dehumidifier. Use the diagram below to wire the SST-W100 to auxiliary
equipment.
To configure the auxiliary relays, follow the steps below.
1.
Press the
MENU
button to open the
Menu Selection
screen.
2. Open the
Installer Settings
menu by pressing the two middle buttons simultaneously for 3 seconds.
Refer to the
section for instructions.
3. From the
Installer Settings
screen, scroll down and
Select
the
Relay Setup
option.
4. Using the
+/-
buttons, set the A1 and/or A2 relay. Refer to table below.
Option
Description
A1 or A2
Relay
Humidify
- Instructs the auxiliary relay to control an external humidifier. For the auxiliary relay to
activate, the
HVAC
mode must be set to either
Heat
or
Auto
and the last call needed to be for heat.
A1 or A2
Relay
Dehumidify
- Instructs the auxiliary relay to control an external dehumidifier. For the auxiliary relay to
activate, the
HVAC mode
must be set to either
Cool
or
Auto
and the last call needed to be for cool.
A1 or A2
Relay
Net
- Instructs the auxiliary relay to be controlled by the Savant Control system and the relays
activate depending on certain triggers and workflows set in the Savant software.
A1 or A2
Relay
Vent
- Instructs the auxiliary relay to control an external vent damper. The output is active when the
fan state is on and the
Fan Cycler
is active.
A1 or A2
Relay
DH-Fan
- The Relay is assigned as an external dehumidification fan speed control output (DH) for use
with air handlers having an external DH fan control input to slow fan speed during dehumidification.
Relay is inactive during normal operation when humidity level is below the
RH Setpoint
. Relay is
active when humidity level is above the
RH Setpoint
.
A1 or A2 Fan
Interlock
On
- Locks the state of the fan to the state of the auxiliary relay when relay is in the
Humidify
or
Dehumidify
mode.
5. Select
Done
when complete
SST-W100 Wireless Thermostat Deployment Guide
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