69-1849 - PRO 4110D Programmable Thermostat - Honeywell

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Installation GuideIn case of difficultyIf you have difficulty with your thermostat, please try the suggestions below. Mostproblems can be corrected quickly and easily.Display is blank • Check circuit breaker and reset if necessary.• Make sure heating & cooling power switches are on.• Make sure equipment door is securely closed.• If battery powered, make sure fresh AA alkaline batteries are installed.Temperaturesettings do notchangeHeating systemdoes not respond(“Heat On”appears onscreen)Cooling systemdoes not respond(“Cool On”appears onscreen)Fan does notturn on in acall for heat“Cool On” or“Heat On”is flashing“Heat On” isnot displayedMake sure heating and cooling temperatures are set to acceptable ranges:• Heat: 40° to 90°F (4.5° to 32°C).• Cool: 50° to 99°F (10° to 37°C).• Check for 24 Vac at the equipment on the secondary side of the transformerbetween power and common. If voltage is not present, check theheating equipment to find the cause of the problem.• Check for 24 Vac between the heat terminal (W) and the transformercommon. If 24 Vac is present, the thermostat is functional. Check theheating equipment to find the cause of the problem.• Check for loose or broken wires between the thermostat and the heatingequipment.• Check for 24 Vac at the equipment on the secondary side of the transformerbetween power and common. If voltage is not present, check thecooling equipment to find the cause of the problem• Check for 24 Vac between the cooling terminal (Y) and the transformercommon. If 24 Vac is present, the thermostat is functional. Check thecooling system to find the cause of the problem.• Check for loose or broken wires between the thermostat and the coolingequipment.• Make sure the Fan Operation switch is set to the proper system.• Compressor protection timeout is engaged. Wait 5 minutes for thesystem to restart safely, without damage to the compressor.• Set the System switch to Heat, and set the temperature level above thecurrent room temperature.“Cool On” isnot displayed• Set the System switch to Cool, and set the temperature level below thecurrent room temperature.12
PRO TH4110D Programmable ThermostatAccessoriesPlease contact your distributor to order accessories.Cover plate assembly ............................................Part Number 50002883-001(Used to cover marks left by old thermostats.)SpecificationsTemperature Ranges• Heat: 40° to 90°F (4.5° to 32°C)• Cool: 50° to 99°F (10° to 37°C)Operating Ambient Temperature• 32° to 120°F (0° to 48.9°C)Shipping Temperature• -20° to 120°F (-28.9° to 48.9°C)Electrical RatingsSystem Voltage (50/60Hz) Running CurrentHeating 20-30 Vac 0.02-1.0 A(Powerpile) 750 mV DC 100 mA DCCooling 20-30 Vac 0.02-1.0 AOperating Relative Humidity• 5% to 90% (non-condensing)Physical Dimensions• 3-13/16” H x 5-3/8” W x 1-1/4” D• 97 mm H x 137 mm W x 32 mm D13
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69-1849 - PRO 4110D Programmable Thermostat - Honeywell

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