COOL − Using the Cool Mode
Enabling and Disabling Cool Mode
Use the COOL button to enable or disable cool mode as desired. If the thermostat is in HEAT or OFF mode, cool mode is enabled when the COOL button is pressed. This is indicated by COOL in the SYSTEM box (see figure 9).
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| Turn Cool ON/OFF | |
|
| Heat | Cool |
MO |
|
|
|
AM I0:30 | FAN | Day/Time | |
| HOLD | Prog | |
| AUTO |
| |
ROOM |
| SYSTEM |
|
SETPOINT COOL |
| ||
75° 70° | Fan | Hold | |
|
| Settings Enter | |
Figure 9
If the thermostat is in cool mode, pressing the Cool button disables COOL mode (indicated by OFF in the SYSTEM box − see figure 10).
Cool Mode Disabled
ROOM | SYSTEM |
°SETPOINT
75 75° OFF
Figure 10
Cooling Demand
Set the thermostat to cool mode to control the cooling equipment. Then, if the room temperature is higher than the temperature setpoint, as shown in figure 11, the ther- mostat detects a cooling demand and will activate the cool- ing equipment to satisfy the demand.
| Cooling Demand |
| ||
MO TU WE TH FR SA SU |
| |||
AM |
|
|
| FAN |
PM i0:00 | ON | |||
|
| HOLD |
| AUTO |
|
|
|
| |
ROOM |
|
|
| SYSTEM |
75 | ° | SETPOINT |
| COOL |
70 | ° | OFF | ||
| Hi | |||
|
| |||
|
| HEAT | ||
|
|
|
| |
Figure 11
Cooling operation is indicated by flashing nowflake" icons in the SYSTEM box. When the actual temperature drops below the temperature setpoint, the snowflake icons will disappear. This indicates that the cooling demand has been satisfied and that the cooling equipment has been turned off.
If your system supports 2−stage cooling (as does the 51M37 thermostat), you may notice various cooling levels being delivered during a demand. Also, if a small cooling demand is present, "Lo" will be displayed in the SYSTEM box. However, if a large cooling demand is present, "Hi" will be displayed in the SYSTEM box (shown in figure 11).
NOTE − If no buttons are pressed during a demand for cooling, the equipment must operate for at least 4 minutes. After a demand has been satisfied, cooling equipment op- eration is locked out for 5 minutes. If another cooling de- mand occurs during this 5−minute interval,
snowflakes will flash; however, the cooling equipment will not operate until the 5−minute delay has elapsed.
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