HEAT − Using the Heat Mode
Enabling and Disabling Heat Mode
The thermostat must be in the HEAT mode to control the heating equipment. Press the Heat button to enable or dis- able HEAT mode. If the thermostat is in COOL or OFF mode, pressing the Heat button enables the HEAT mode (indicated by HEAT in the SYSTEM box − see figure 4).
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| Turn Heat ON/OFF | ||
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| Heat | Cool |
MO |
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AM | 5:30 FAN | Prog | Day/Time | ||
PM |
| HOLD | AUTO | ||
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| SYSTEM |
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ROOM | SETPOINT |
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66° 70° HEAT | Fan | Hold | |||
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| Settings Enter | |
Figure 4
If the thermostat is in heat mode, heat mode is disabled when the HEAT button is pressed. This is indicated by OFF in the SYSTEM box as shown in figure 5.
Heat/Cool Mode Disabled
ROOM | SYSTEM |
°SETPOINT
75 75° OFF
Figure 5
Heating Demand
Set the thermostat to heat mode to control the heating equipment. Then, if the room temperature is lower than the temperature setpoint, as shown in figure 6, the thermostat detects a heating demand and will activate the heating equipment to satisfy the demand.
Heating Demand
ROOM | SYSTEM | |
SETPOINT | ||
72° | ||
75° | ||
| HEAT | |
| Figure 6 |
Heating operation is indicated by a flame icon in the SYS- TEM box. When the actual temperature rises above the temperature setpoint, the flame icon will disappear. This indicates that the heating demand has been satisfied and that the heating equipment has been turned off.
NOTE − Heating equipment is activated for at least 3 min- utes if no buttons are pressed during the demand interval.
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 7).
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| Turn Cool ON/OFF | |
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| Heat | Cool |
MO |
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AM I0:30 | FAN | Day/Time | |
| HOLD | Prog | |
| AUTO |
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ROOM |
| SYSTEM |
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SETPOINT COOL |
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75° 70° | Fan | Hold | |
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| Settings Enter | |
Figure 7
If the thermostat is in cool mode, pressing the Cool button disables COOL mode (indicated by OFF in the SYSTEM box − see figure 5).
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 8, the thermo- stat detects a cooling demand and will activate the cooling equipment to satisfy the demand.
Cooling Demand |
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ROOM |
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75° | SETPOINT | COOL |
70° | OFF | |
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| HEAT |
Figure 8
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.
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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51M34 SERIES 5/2
