Assessments - 1, GPA: 5
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The display will be blank when no battery power is left. The system will remain off until new batteries are installed. (Your programs and time settings will be lost if the batteries are not replaced within one minute.) The thermostat will resume normal operation after new batteries are installed. 50 hold/return hold/return icons and features, cont. 7. Auto recovery – allows heating and cooling systems to gradually recover from an energy-saving setpoint temperature to a comfort setpoint temperature. Auto recovery calculates the time needed to adjust the temperature to the next program setting. When the thermostat is in Auto Recovery mode, the display will flash alternating messages of RECO and the time. Auto Recovery can be disabled by sliding the recovery switch on the back of the circuit board to the disable position. (Auto Recovery will not operate if Permanent or Temporary holds are on.) Press HOlD/RETURN during the Auto Recovery process to manually cancel the recovery. 52 icons and features, cont. 8. Error mode – indicates an unexpected battery problem. The screen will flash an ERR message and shut your system off until the batteries are replaced with new AA alkaline batteries. You must Reset and reprogram the thermostat after replacing the batteries if the thermostat has entered Error mode. 9. Auto cut off – automatically turns the system off if the temperature rises above 95o F (35o C) or drops below 40o F (4o C). (If your HVAC system has malfunctioned, the system will no longer respond to thermostat controls and the Auto cut off will have no effect.) 54 1. Temperature Range 2. Compressor Protection After the system stops running in cooling mode, there will be a 3.5 minute delay before it can be restarted to prevent compressor damage due to rapid cycling. 3. Resetting the unit To restore the thermostat to the original factory settings, press the reset button with a paperclip. (This will erase any user-programmed settings.) resetDisplay Range 30o F 99o F (0o C) (37o C) 45o F Program Range 95o F (7o C) (35o C) Out of Range "HI" >99o F Out of Range "LO" <30o F important features 1. Temperature Range 2. Compressor Protection After the system stops running in cooling mode, there will be a 3.5 minute delay before it can be restarted to prevent compressor damage due to rapid cycling. 3. Resetting the unit To restore the thermostat to the original factory settings, press the reset button with a paperclip. (This will erase any user-programmed settings.) resetDisplay Range 30o F 99o F (0o C) (37o C) 45o F Program Range 95o F (7o C) (35o C) Out of Range "HI" >99o F Out of Range "LO" <30o F important features 55 wiring diagrams 4-wire Heat/Cool System JumperWallplateTerminalsFan Relay Cool Contactor Heat Relayor Valve 24V SupplyHeat/Cool RhRcY/OW/BY1GXXSystemSelectorSTDHP– 5-wire Heat/Cool System No JumperWallplate Terminals Fan Relay Cool 24V Supply Heat Relayor Valve Heat 24V Supply RhRcY/OW/BY1GCool Contactor X System Selector STD HP– X - No Connection wiring diagrams 4-wire Heat/Cool System JumperWallplateTerminalsFan Relay Cool Contactor Heat Relayor Valve 24V SupplyHeat/Cool RhRcY/OW/BY1GXXSystemSelectorSTDHP– 5-wire Heat/Cool System No JumperWallplate Terminals Fan Relay Cool 24V Supply Heat Relayor Valve Heat 24V Supply RhRcY/OW/BY1GCool Contactor X System Selector STD HP– X - No Connection 56 2-wire Heat Only JumperXXXWallplateTerminalsRhRcHeat 24V or Millivolt Supply Heat Relayor Valve XY/OW/BY1GSystemSelectorSTDHP– X - No Connection Single-stage Heat Pump JumperXOR Heat Mode Cool Mode Connect to Proper Reversing Valve Terminal. SystemSelectorSTDHP– WallplateTerminalsRhY/OW/BRcGFan Relay ReversingValve CompressorContactor Y1Heat Pump24V Supply wiring diagrams, cont. 2-wire Heat Only JumperXXXWallplateTerminalsRhRcHeat 24V or Millivolt Supply Heat Relayor Valve XY/OW/BY1GSystemSelectorSTDHP– X - No Connection Single-stage Heat Pump JumperXOR Heat Mode Cool Mode Connect to Proper Reversing Valve Terminal. SystemSelectorSTDHP– WallplateTerminalsRhY/OW/BRcGFan Relay ReversingValve CompressorContactor Y1Heat Pump24V Supply wiring diagrams, cont. 57 3-wire Cool Only RhRcY/OW/BY1GJumperXXWallplateTerminalsCool Contactor Cool 24V Supply Fan Relay XSystemSelectorSTDHP– X - No Connection 3-wire Heat Only JumperXXWallplateTerminalsFan Relay RhRcY/OW/BY1GHeat 24V Supply XHeat Relayor Valve SystemSelectorSTDHP– wiring diagrams, cont. 3-wire Cool Only RhRcY/OW/BY1GJumperXXWallplateTerminalsCool Contactor Cool 24V Supply Fan Relay XSystemSelectorSTDHP– X - No Connection 3-wire Heat Only JumperXXWallplateTerminalsFan Relay RhRcY/OW/BY1GHeat 24V Supply XHeat Relayor Valve SystemSelectorSTDHP– wiring diagrams, cont. troubleshooting 1. My display will not come on. 1 a. Check batteries and battery connections. 1 b. Reset the thermostat. ............................................................................................. 2. The auto fan feature will not operate properly. 2 a. Remove the thermostat from the wall pla...
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