3-9
Module 4 –
Wireless HVAC Thermostats
ST898ZB Optima S Thermostat
Section 3
Operation
Without further configuration, the Optimal S Thermostat can be used as a manual thermostat . To
access enhanced features, additional settings must be configured . See Configuring the Thermostat
later in this section for more details . The SALUS Smart Home system can be used to set up a schedule
on the device . Instructions for this are provided in Section 4, Thermostat Schedules .
Display timeout: The Optima S display turns off after a short time to conserve energy and minimize
nighttime distractions . The default timeout is 10 seconds, but the time can be adjusted in the
configuration menu .
Changing the Setpoint: To change the setpoint,
simply touch the + button to increase or the
– button to decrease the target temperature .
While adjustments are being made, the room
temperature will be shown in Time Display
and the current setpoint will be in the Main
Temperature Display area . The message display
will indicate which set point is being adjusted .
Touch the Main Temperature Display to save the
value or simply wait 3 seconds until the screen
times out and returns to the Home screen .
Permanent Hold: To hold the temperature at a
specific target, ignoring automated changes from the
SALUS Smart Home application (discussed in Section
4), change the setpoint as shown above and press
the Permanent Hold Icon on the Fan Button while
the setpoint temperature is displayed on the Main
Temperature Display . The Permanent Hold Status
Icon appears next to the Main Temperature Display,
indicating Permanent Hold is active . To cancel
Permanent Hold, press + or – to activate the set point
adjustment screen and press the Permanent Hold Icon .
The Permanent Hold Status Icon is removed, and the
Thermostat will follow an external schedule if set up .
The set point is adjusted by 1°F (0.5°C) for each button press. The Optima S maintains a minimum
temperature difference between the Heating and Cooling set points [Default 3°F (1.5°C)]. If the set
point being changed gets too close, the other setpoint will be adjusted to maintain the separation.
Operating Mode: Press the Mode button to
change the operating mode of the thermostat .
The Thermostat will scroll from
Off;
Heat;
Cool;
Auto . For Heat Pumps,
Emergency Heat is also an option .
Fan Mode: Press the Fan button to toggle
between the following Fan modes:
Fan Auto, which operates the fan only when
a call for heat or cooling is present
Fan On which operates the fan continuously
