43
Option 44 — Super Comfort Heat
This option is only available on heat pump units HP (HP, H2, hh, and h2) when
Option 41 (Variable Speed Blower) is set to On and the system has a valid OAT
sensor.
OF (Off)
−
Comfort Heat is off
On
−
Comfort Heat feature is on.
If the outdoor air temperature is between 12
−
40
F/
−
11
−
4
C and the
compressor is running in heating, then the fan output is turned off. This will
signal the variable speed blower to reduce the air speed. The fan output is turned
off even if the user has the fan selection set to continuous fan. The fan output
will be turned back on in this temperature range if the maximum capacity of
auxiliary heat is on due to system demand (auxiliary heat on in response to a
defrost signal shouldn’t cause the fan to turn back on).
If the outdoor air temperature is below 12
F/
−
11
C and there is sufficient
demand for the equipment to be on, then the fan output is turned back on and the
W/W1 output is energized. In a two speed unit the Y/Y2 output should be
energized in addition to the W/W1 output. This logic does not apply to a Hybrid
Heat system. In the unlikely event that the installer has selected a heat pump
lockout temperature (Option 09) of 5
F/
−
15
C in a Hybrid Heat system and the
comfort heat feature is on, then the comfort heat feature will turn the W/W1 on
and the compressors off when the outdoor air temperature drops below
12
F/
−
11
C instead of at the lower temperature of 5
F/
−
15
C.
NOTE
: All temperature boundaries have a +/
−
2
hysteresis
Factory default is OF (Off).
