Equipment Protection Override
Both the minimum compressor OFF timer and the mini- mum equipment cycle timer can be over−ridden by press- ing and holding either the HEAT or COOL button down for 4 seconds.
Over−Temperature Protection
Thermal mechanical switch opens W1 at 93°F+/−6°F.
Filter Reminder
Settings of 0 (Off), 1, 3, 6 or 12 months are available. When programmed time has elapsed, a FILTER indicator is dis- played.
Service Reminder
The SERVICE indicator is displayed only under the follow- ing conditions:
Sif the thermostat Y1 terminal has been activated with 24VAC for at least 5 minutes, AND the L terminal is shorted to the R terminal;
OR
Sif the thermostat Y1 terminal has been activated with 24VAC for at least 5 minutes, AND the L terminal is shorted to the C terminal.
Power Loss/Recovery
Thermostat memory is retained for a minimum of 24 hours during a power loss (includes retention of programmed temperature setpoint, heat/cool and fan mode settings, fil- ter reminder status, and equipment protection timers). Af- ter 24 hours of power loss, programmed settings will be lost and replaced with default settings.
IMPORTANT
Power must be applied for at least six consecutive hours prior to a power loss in order for memory to be retained for the specified time.
LCD Backlight
Activated for 8 seconds when any key is pressed.
NOTE − During an electrical storm or similar disturbance, the backlight may activate for a few seconds. This is normal and will no longer occur after the electrical disturbance has passed.
Thermostat Operating Conditions
35°F to 105°F, 5% to 90% RH
Thermostat Storage Conditions
−40°F to 185°F, 5% to 95% RH
Thermostat Output Table
The following table depicts the 51M32 thermostat output states for various input conditions. See table 2.
Table 2
Thermostat Outputs
Condition |
| W1 | Y1 | G |
|
|
|
|
|
|
|
|
| |
Gas Heat, Auto Fan |
|
|
| |
|
|
|
| |
heat demand |
| X |
|
|
|
|
|
|
|
cool demand |
|
| X | X |
|
|
|
|
|
no demand |
|
|
|
|
|
|
|
|
|
Gas Heat, Continuous Fan |
|
|
| |
|
|
|
| |
heat demand |
| X |
| X |
|
|
|
|
|
cool demand |
|
| X | X |
|
|
|
|
|
no demand |
|
|
| X |
|
|
|
|
|
Electric Heat, Auto Fan |
|
|
| |
|
|
|
| |
heat demand |
| X |
| X |
|
|
|
|
|
cool demand |
|
| X | X |
|
|
|
|
|
no demand |
|
|
|
|
|
|
|
|
|
Electric Heat, Continuous Fan |
|
|
| |
|
|
|
| |
heat demand |
| X |
| X |
|
|
|
|
|
cool demand |
|
| X | X |
|
|
|
|
|
no demand |
|
|
| X |
|
|
|
|
|
NOTE − |
|
|
| |
X = output is activated with 24VAC. |
|
|
| |
Page 6