Programming instructions

40
Power save setback
The power save setback lowers the set points for heating equipment by a number of degrees. Each relay
or variable configured as heating will have its set point lowered. Using power save is similar to
setting your home furnace thermostat a few degrees lower at night so that the furnace switches on at
a lower temperature.
The difference between the DIF and power save setbacks is that DIF adjusts the master set point,
affecting all equipment. Power save adjusts only the heating equipment, individually.
The following example shows what happens with a power save setback of 5°F.
 During the hours of power save setback is not active, the equipment functions using its normal
set points.
 During the hours the power save setback is active, the equipment functions using the adjusted
set points; in this case, 5° lower.
DIF and power save setback combined
If DIF and power save setbacks are active at the same time, the power save value is what remains
after the DIF value has been applied.
For example, for a DIF of 5°F and a power save of 6°F:
 The DIF setback lowers the master set point 5°F.
 The power save setback lowers the heating equipment set points by another 1°, for an overall
adjustment of 6°F for heating equipment, and 5°F for the other equipment.
Normal equipment set points
Adjusted power save set points