IOM 1178-1 / Page 15 of 16
Programming
Averaging or Weighing Remote Sensors
The thermostat will weight or average the temperature of the
indoor remote sensor with the local sensor in the thermostat
for each program period. The averaging will be active only
when the local sensor and the indoor remote sensor are both
functional and enabled in the Installer/Configuration menu.
When the thermostat is in the Set Schedule mode, the weight
of the indoor sensor will be shown in the current temperature
digits of the display. The weight will show as A2 (average and
default), H4 (high) or L1 (low). Pressing the and keys at the
same time will change the weight for the program period. The
weight of the thermostat sensor is fixed.
In normal operation of the thermostat, the current temperature
displayed will be the weighted average of the local sensor and
the remote sensor using the formula (local sensor weight ×
local sensor temperature) + (remote sensor weight × remote
sensor temperature) / (local sensor remote sensor
weight).
Example:
Local sensor temperature is 80° and the remote
sensor is 70°.
If weight is selected H4, the averaged temperature of 72° will
be displayed.
(1 × 80) + (4 × 70) / 5 = 72°
If weight is selected A2, the average temperature of 73° will
be displayed.
(1 × 80) + (2 × 70) / 3 = 73.3°
If weight is selected L1, the average temperature of 75° will
be displayed.
(1 × 80) + (1 × 70) / 2 = 75°
The example shows that the weight selected would prioritize
the overall averaged temperature between the two sensors.
The high weight selection caused the remote sensor to have
a higher influence in the calculated temperature average than
the local sensor and the low weight selection caused the
remote sensor to have less influence.
