W8710A EQUIPMENT MONITORING SYSTEM
15
68-0256
9.
As the relative humidity increases, the sensible cooling
temperature decreases. For example, if the relative
humidity is higher than 50 percent, the temperature
difference is greater than 18°F.
10.
The factory-set tolerance range in a cooling application
is +/- 6°F from the 18°F calculated D/T. In this example,
the tolerance range is 12°F to 24°F. If desired, the
tolerance range can be increased or decreased for your
individual system or requirements. See Entering
Custom Setup section.
11.
When the temperature fall between the return and sup-
ply sensors is measured and is higher than 24°F, a High
D/T Alert Report is generated.
12.
When the temperature fall between the return and sup-
ply sensors is measured and is lower than 12°F, a Low
D/T Alert Report is generated.
Supply Air
Temperature
Return Air
Temperature
0%
50%
Relative Humidity
100%
Calculated
Temperature Fall
Changes with
% Relative Humidity
Cooling
Supply Air
Temperature
Return Air
Temperature
0%
50%
Relative Humidity
100%
18 Calculated
Temperature Fall
Cooling
-6 Tolerance Range
+6 Tolerance Range
Supply Air
Temperature
Return Air
Temperature
0%
50%
Relative Humidity
100%
18 Calculated
Temperature Fall
Cooling
Above 24 D/T
@ 50% RH
High D/T
Alert Report Sent
+6 Tolerance Range
Supply Air
Temperature
Return Air
Temperature
0%
50%
Relative Humidity
100%
18 Calculated
Temperature Fall
Cooling
-6 Tolerance Range
Below 12 D/T
@ 50% RH
Low D/T
Alert Report Sent
