Assessments - 1, GPA: 3
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• Wait 4-minutes for 2nd Stage: – Y1, Y2 and G terminals will energize. • Set the thermostat to the OFF mode. Symptom Cause Thermostat does not call for cooling Minimum-off times. Change the mode to OFF first, then change the mode to COOL and make a call for cooling. Cooling does not come on at all RC terminal not connected – see wiring diagrams. Cooling equipment power not on. Heat comes on instead of cooling Reversing valve wiring. Miswiring – check wire colors at thermostat and HVAC equipment. - 28 8. CHECK EMERGENCY HEAT OPERATION (Heat Pumps Only) Notes: 1. To avoid the minimum off times during system checkout, always start the check out procedure in the OFF mode. • Set the thermostat to the OFF mode: • Set the thermostat to the EMERGENCY HEAT (EMERG) mode: – The B terminal will energize when in the Emergency Heat mode. TROUBLESHOOTING – EMERGENCY HEAT OPERATION • Raise the heat setting to 5° higher than the room temperature to initiate a heat call. The mode display will change from “E-HEAT MODE” to “HEATING”, which will flash when the thermostat is calling for heat: – W1 and W2 (and G if GAS/ELEC dip switch is set in the ELEC position) terminals will energize. • Set the thermostat to the OFF mode. Symptom Cause Thermostat does not call for heat Minimum-off times. Change the mode to OFF first, then change the mode to EMERGENCY HEAT and make a call for heat. Emergency Heat does not come on at all RH terminal not connected – see wiring diagrams. Heating equipment power not on. Fan comes on before heat starts, or Fan does not come on with heat Change position of ELEC/GAS dip switch – ELEC for electric heat systems (fan on with heat call) or to GAS for fossil fuel systems where the fan is controlled internally by the heating equipment. - 29 (10) CUSTOMIZE THE APPLICATION SETTINGS 1. DIFFERENTIAL Determines the temperature above/below the temperature setting at which the heating or cooling equipment will turn on. For example, a heat temperature setting of 70°F with a differential of 2° will result in the equipment turning on and off to maintain the temperature between 68°F and 70°F. If the second stage differential is also 2°, the second stage would be used to ensure the temperature did not drop below 66°. However, once the second stage is turned on, it will stay on until the temperature again reaches the 70° setting. The default setting for the first stage and second stage differential is 1°. To change the differential settings: 1. Make sure the thermostat is in the OFF mode. 2. Press and hold both the and buttons for 3 seconds. – The display will show the ADV. SETTINGS MENU. 3. Use the or button to highlight “SET DIFFERENTIAL” and press the SELECT button. – If the thermostat SINGLE/MULTI dip switch is set for MULTI, two differentials will appear, if set for SINGLE, only one will appear. 4. To cancel, press the BACK button. This will return you to the ADV. SETTINGS MENU. 5. To change the first stage differential, press the and button to raise or lower the setting. To change the second stage differential, press the SELECT button. 6. To finish and return to the ADV. SETTINGS MENU, press the SELECT button after the value(s) have been set. – For heat pumps – the auxiliary heat differential is the same as the first stage differential in single-stage heat pump applications and is the same as the second stage differential for two-stage heat pump applications. - 30 2. OFFSET All thermostats are factory calibrated to be accurate to within ±1° of true temperature. An offset is available to allow for agreement with field temperature measuring instruments. The value set will be added to the temperature sensed by the thermostat. The result will be displayed on the thermostat and will be used as the control value. To change the offset: 1. Make sure the thermostat is in the OFF mode. 2. Press and hold both the and buttons for 3 seconds. – The display will show the ADV. SETTINGS MENU. 3. Use the or button to highlight “SET OFFSET” and press the SELECT button. 4. To cancel, press the BACK button. 5. To change the offset value, press the or button to raise or lower the setting between –4° and +4° (°F or °C). 6. To finish and return to the ADV. SETTINGS MENU, press the SELECT button. 3. PROGRESSIVE RECOVERY Progressive Recovery causes the thermostat to bring on the heating/cooling equipment before the programmed event start time, in order for the temperature to be at the programmed value by the programmed time. The feature can be turned on or off. When turned off, the heating/cooling equipment will not begin bringing the space temperature to the programmed value until the start of the event. To turn Progressive Recovery on or off: 1. Make sure the thermostat is in the OFF mode. 2. Press and hold both the and buttons for 3 seconds. – The display will show the ADV. SETTINGS MENU. 3. Use the or button to highlight “PROGRESSIVE RECOVERY” and press the SELECT button. • To cancel, press the BACK button • To change ...