Optima S Thermostat
9
Depending on the Equipment Type selected, you may have 2 heating stages and 2
cooling stages. The parameters below allow you to set the separation between when
the 1
st
stage energizes, and the 2
nd
stage energizes below set point (heating) and above
set point (cooling).
DLTA 1ST STAGE
(heating)
2
0.25
°
C/0.5
°
F
(default)
Heating differential
1
st
stage
0.25 - 1ºC in 0.25º steps
0.5 - 2ºF in 0.5º steps
DLTA 2ND STAGE
(heating)
2
1.0
°
C/2.0
°
F
(default)
Heating differential
2
nd
stage
0.25 – 2.0ºC in 0.25º steps
0.5 – 4.0ºF in 0.5º steps
DLTA 1ST STAGE
(cooling)
3
0.25
°
C/0.5
°
F
(default)
Cooling differential
1
st
stage
0.25 - 1ºC in 0.25º steps
0.5 - 2ºF in 0.5º steps
DLTA 2ND STAGE
(cooling)
3
1.0
°
C/2.0
°
F
(default)
Cooling differential
2
nd
stage
°
0.25 – 2.0ºC in 0.25º steps
0.5 – 4.0ºF in 0.5º steps
2
Not applicable for AC only (
--AC
)
3
Not applicable for Heating only (
HT--
)
To avoid short cycling of the compressor, the Y1Y2 Min Off Time delays how long the
cooling output will remain OFF after cooling is satisfied. The output will not reenergize
until the Y1Y1 Min Off Time expires.
Y1Y2 MIN OFF T
(Not applicable for Heat Only)
5
.0
(default)
Compressor protection minimum OFF time
0 - 5 minutes in 0.5 steps
When cooling is satisfied and the output turns Off, the fan will continue to run for the
time designated by FAN DELAY to minimize condensation on the cooling coil.
FAN DELAY
0.5
(default)
Fan control relay keeps fan running for Fan Delay
after cooling stops.
0 - 5 minutes in 0.5
steps
