8
Controller Operations: Output Steps
The target temperature is the baseline for determining when each output comes on. Each
output has a temperature offset to be added to (Cools) or subtracted from (Heats) the target
temperature to determine that output’s activation temperature. Therefore, as the target temperature
changes with the operating stage, the activation temperature for each output changes. Figure 5 shows
the sample settings for the step temperatures and the activation temperatures with respect to the
target temperature for each output.
Controller Operations: Output Temperature
Using the information in Figure 4 & Figure 5, if the time is 8:00 AM the operating stage is DIF
and the target temperature is 50
F. The output temperatures for each output are as follows:
Target Temperature
Offset
Output Temperature
COOL 4
50
F
+ 11 =
61
COOL 3
50
F
+ 7 =
57
COOL 2
50
F
+ 4 =
54
COOL 1
50
F
+ 2 =
52
HEAT 1
50
F
- 1 =
49
HEAT 2
50
F
- 3 =
47
COOL 1,2,3,4 ON
HEAT 1 AND 2 ON
HEAT 1 ON
COOL 1 ON
COOL1 AND 2 ON
COOL 1, 2 AND 3 ON
COOL 4 SP +/- = 11
COOL 3 SP +/- = 7
COOL 2 SP +/- = 4
COOL 1 SP +/- = 2
HEAT 1 SP +/- = 1
HEAT 2 SP +/- = 3
+2
-1
+4
+7
+11
-3
TARGET TEMPERATURE
Figure 5: Output Steps
Table 1: The Effect of Step on Target Temperature to Get Output Temperature
