Carrier 50QE900-NPWS Aquazone Owner's Manual page 2

Auto-Changeover — When the thermostat mode is set to
AUTO, the thermostat will provide automatic changeover from
Heating to Cooling mode and Cooling to Heating mode when
required. The thermostat will automatically switch to maintain
the desired temperature setting. The thermostat does not need
to be manually changed from heating to cooling or cooling to
heating operation.
NOTE: It is recommended that auto-changeover mode not be
used if the outdoor temperature is consistently lower than 50 F
(10 C) or greater than 80 F (27 C). In these cases, select Heat-
ing or Cooling mode only.
OPERATION
The Mode button selects the operating mode of the thermo-
stat. If OFF is selected, the thermostat will not enter Heating or
Cooling mode. If HEAT is selected, the thermostat will only
enter Heating mode (if the room temperature is below the heat-
ing set point). If COOL is selected, the thermostat will only en-
ter Cooling mode (if the room temperature is above the cooling
set point). If AUTO is selected, the thermostat will enter Heat-
ing or Cooling mode based on the room temperature and the
heating and cooling set points.
Auto-Changeover —
to AUTO, the thermostat will provide automatic changeover
from Heating to Cooling mode and Cooling to Heating mode
when required. The thermostat will automatically switch to
maintain the desired temperature setting. The thermostat does
not need to be manually changed from heating to cooling or
cooling to heating operation.
When the thermostat mode is set
Two-Stage Operation —
cool is turned on when the first stage has been on for a mini-
mum of 2 minutes and the temperature differential from the set
point is equal to or greater than the set point plus the deadband
plus 2 degrees.
Fan Operation —
( is displayed), the fan will run continuously (except when
Mode is switched to OFF).
If continuous fan operation is not selected, the fan will only
operate during heating or cooling operation.
Emergency Heat —
for heat pump applications. To turn on emergency heat, press
and hold the Fan button. While holding the Fan button, press
the UP button. An ''EH'' will be displayed. During emergency
heat, the fan will operate and the second stage of heat will be
energized (locking out the first stage compressor). To exit
emergency heat, press and hold the Fan button. While holding
the Fan button, press the UP button. During emergency heat,
only OFF and HEAT modes are available.
2
The second stage of heat or
If continuous fan operation is selected
Emergency heat is available only