Carrier PERFORMANCETSERIES EDGER THERMIDISTATT CONTROL TP-PRH-A - Manual (Page 30)

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temperature falls below 45 _F (7_C), the auxiliary heat will be allowed to turn on
and will continue to run until demand is satisfied.
Default is OF (off).
Option 09 — Heat Pump Lockout Temperature Balance Point (only
available when heat pump is used and when outdoor air temperature sensor
is present)
This selection is only available on Hybrid Heat systems. A Hybrid Heat system
is selected via the Option 1 Equipment Type configuration. Configurations
settings are: OF (off), 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55.
OF (off) — the heating cycle will always start with heat pump heating.
5 to 55
_F (−15 to 13_C) — the outdoor temperature below which heat pump
operation is not allowed.
When emergency heat mode is selected, only auxiliary heat will operate.
Default is OF (off).
Option 10 — Reversing Valve
This selection is only available on heat pump systems. “O” terminal can be
configured to be energized in either heating mode or in cooling mode, depending
on heat pump operation. “O” is used to describe a heat pump system that
energizes its reversing valve in cooling. “B” is used to describe a heat pump
system that energized its reversing valve in heating.
H — Reversing valve output (O/W2/B) is energized when HEAT mode is
selected.
C — Reversing valve output (O/W2/B) is energized when COOL mode is
selected.
Default is C.