ED-3 Electronic panel - Duro Dyne

Cooling Limit PotentiometerThis potentiometer sets minimumtemperature allowed in cooling. If thesupply air temperature drops below theset Cooling Limit, the cooling is turned offand the indoor fan activated. After twominutes the cooling will be turned backon if the supply air has risen above theCooling Limit.W2 Timer PotentiometerSecond stage heating is controlled by atimer. If the panel has been calling forheating longer than the time set on theW2 Timer potentiometer, the second stageheating will be activated provided it is notinhibited by the Outdoor TemperatureLimit or the Capacity.Heat LEDThe Heat LED will be lit continuously whenthe panel is calling for first stage heating. TheHeat LED will blink when the panel is callingfor second stage heating.Status LEDThe Status LED blinks continuously whenthe panel is powered and indicates thepanel/microprocessor is operating properly.If the status LED is on and not blinking, theautomatic contractor test is in progress.SA Limit LEDThe SA Limit LED is on continuously when aSupply Air Sensor is installed. The SA LimitLED blinks when the panel is in supply airlimit status (Heating or Cooling temperatureexceeded).HEATSTATUSSA LMTODT Limit PotentiometerA low cost Outdoor Air Sensor can beused to monitor the outdoor temperatureand if the outdoor temperature is greaterthe ODT Limit, second stage heating isinhibited if the option was selected. In adual fuel heat pump, the ODT Limit isused to automatically switch the panel tothe secondary heating system.Damper LEDsThe green damper LEDs will light when thedamper is in the open position. A damperLED will blink if it detects a zone thermostatis calling for both heating and cooling thatmay be caused by a shorted wire.System LEDsThe eight red LEDs indicate the status ofthe HVAC system. Each LED will indicateby being lit continuously or blinking.Fan LEDThe Fan LED will be lit continuously whenthe panel is in continuous indoor fanoperation. The Fan LED will blink whenthe system is in Purge mode.Cool LEDThe Cool LED will be lit continuouslywhen the panel is calling for cooling.FANCOOLODT Limit LEDThe ODT Limit LED is on continuously whenan Outdoor Air Sensor is installed. The ODTLimit LED blinks when the panel is inhibitingsecond stage calls because of ODT Limit orthe dual fuel heat pump has switched to thesecondary heating system.Capacity Limit LEDThe Capacity Limit LED is on continuouslywhen the panel is inhibiting second stage callsbecause only one zone is calling for heating.Emergency Heating LEDThe Emergency Heating LED is on continuouslywhen the panel is in the emergency heat modeand will blink during an emergency heat call.ODT LIMITCAP LMTEM HEATWIRING INSTRUCTIONSAll wiring should be done in accordance with localand national codes. Use color-coded, multi-conductorthermostat wire.THESE PANELS ARE DESIGNED FOR USE WITH24VAC CONTROLS AND SHOULD NOT BEUSED WITH OTHER VOLTAGES. USE CAUTIONTO AVOID ELECTRIC SHOCK OR DAMAGE TOEQUIPMENT.Wiring Supply Air SensorTo install the optional Supply Air Sensor, connect twowires to the Supply Air Sensor and to the two terminalsmarked “SAS” on the panel.The Supply Air Sensor should be installed in the supplyduct so that it measures the supply air temperature.DuroZone ED3 - INSTALLATION INSTRUCTIONS PAGE 5