Carrier PERFORMANCETSERIES EDGER THERMIDISTATT CONTROL TP-PRH-A - Manual (Page 34)

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cooling equipment when the dry contact is closed. See Wiring Diagrams for
more information.
Default is OF (off).
Option 19 — Dry Contact Configuration (non−programmable models only)
OF — The dry contact is always de−energized.
ON — The dry contact will operate as a DH relay. This relay is reverse logic.
When the humidity level is above the dehumidify setpoint, the dry contact
D1−D2 will be opened. When the humidity level is below the dehumidify
setpoint, D1−D2 will be closed. There is a +/− 2% hysteresis around the
dehumidify setpoint to prevent rapid on/off cycling of the DH output. When
configured for dehumidification, the Rc terminal must be connected to one of the
dry contact terminals. This provides power to energize the dehumidify terminal
on the cooling equipment when the dry contact is closed. See Wiring Diagrams
for more information.
Default is OF (off).
Option 20 — Outdoor Air Temperature Offset Adjustment
This selection allows the calibration, or deliberate miscalibration of the outdoor
air temperature sensor reading. The selection ranges from −5 to +5 _.
Default is 0.
Option 21 — Keypad Lockout (programmable models only)
This selection allows the installer to limit access to the keypad. Selections are OF
(off), 1, 2, 3. These options are independent of Option 24, which allows the
programmable model to be configured as a non−programmable thermostat.
OF (off) — The user has full access to the keypad.
1 — The user has access to change the setpoints, time of day and calendar.