About Advanced Features & Operation
Page 17
DUAL FUEL Vs. ADVANCED HEAT PUMP - Advanced Setup Step
# 4 allows this thermostat to be configured to control 2 heat
sources (Dual Fuel) or, to have maximum flexibility in controlling
multi-stage heat pumps (Advanced Heat Pump).
Dual Fuel
systems utilize an outdoor temperature sensor.
When the outdoor temperature is at or below the Changeover
Balance Point,
advanced setup step #6, page 12,
the primary
heat source is ‘locked out’ and the heat source connected to
W3 is energized. There is a 3 degree deadband from the
Changeover Balance Point, which requires the outdoor
temperature to rise 3 degrees before switching back to the
primary heat source.
Advanced Heat Pump
operation allows maximum flexibility
when controlling multi-stage heat pumps. Turn on times
between stages, between deadbands are installer adjustable.
When used with an outdoor temperature sensor, the 3rd
stage is ‘locked out’ unless the outdoor temperature is at
or below the adjustable Changeover Balance Point. If an
outdoor temperature sensor is not installed, the 3rd stage
is locked out.
Note: Adjusting the Changeover Balance Point to ‘OF’ will allow
3rd stage operation without an Outdoor sensor. Page 12,#6.
MEMORY BACKUP - In the event of a power loss, the
thermostat will retain the stored program settings without
external power or batteries.
MINIMUM HEAT/COOL SETPOINT DIFFERENCE - The Heat
and Cool setpoints will not be allowed to come any closer
to each other than the value set in Advanced Setup
step
# 12, on page 14
. This minimum difference is enforced
during Auto changeover
operation.
and Program On
