York DNH 030 Installation Manual

Also see for DNH 030: Technical guide Installation manual

York DNH 030 Installation Manual Manual pdf 15 page image

282911-YIM-B-0807Unitary Products Group 152. Pressure Switch (PS) - If the draft motor should fail, thepressure switch prevents the ignition controls and gasvalves from being energized.3. Flame Sensor - The flame sensor and controls arelocated per Proper Flame Adjustment, Figure 12. If anignition control fails to detect a signal from the flame sen-sor indicating the pilot flame is properly ignited, then themain gas valve will not open.4. Rollout Switch (RS) - This switch is located in theburner vestibule. In the event of a sustained main burnerflame rollout, it shuts off the ignition control and closesthe main gas valve.NOTE: The manual reset Rollout Switch (RS) must be resetbefore allowing furnace operation.5. Auxiliary Limit Switch (ALS) - This control is locatedinside the heat exchanger compartment and is set toopen at 160°F. It is a manual reset switch. If ALS trips,then the primary limit (LS) has not functioned correctly.Replace the primary limit LS.COOLINGWhen the thermostat calls for COOL, the thermostat termi-nals G and Y are energized signaling the compressor andoutdoor fan to run.With a call for Y, the circulating fan is energized at coolingspeed.When the thermostat is satisfied, terminals G and Y are de-energized, de-energizing the compressor and outdoor fan.After a cool fan off delay timing of 30 seconds the circulatingfan is de-energized.CIRCULATING FANWhen the thermostat calls for FAN, the thermostat terminal Gis energized signaling the circulating fan to run at the coolspeed.If a call for COOL occurs, the circulating fan continues to runat the cool speed.If a call for HEAT occurs, the circulating fan switches to heatspeed after a 30 second delay.When the thermostat ends the call for FAN, the thermostatterminal G is de-energized, de-energizing the circulating fan.START-UPPRE-START CHECK LISTComplete the following checks before starting the unit.1. Check the type of gas being supplied. Be sure that it isthe same as listed on the unit nameplate.2. Make sure that the vent outlet air hoods has been prop-erly installed.OPERATING INSTRUCTIONS1. STOP! Read the information on the unit safety label.2. Set the thermostat to the OFF position.3. Turn off all electrical power to the unit.4. DO NOT try to light the burners by hand. This applianceis equipped with an ignition device which automaticallylights the burners.5. Remove the access panel.6. Turn the gas valve switch to the OFF position.7. Wait five (5) minutes to clear out any gas. If you thensmell gas, STOP! Follow B in the information on the unitsafety label. If you don't smell gas, go to the next step.8. Turn the gas valve switch to the ON position.9. Replace the control access panel.10. Turn on all electric power to the unit.11. Set the thermostat to the desired setting.12. If the unit will not operate, follow the instructions To TurnOff Gas To Appliance and call your service technician orgas supplier.TO TURN OFF GAS TO UNIT1. Set the thermostat to the OFF position.TABLE 11: IGNITION CONTROL BOARD FLASHCODESFlash Code DescriptionHeart Beat Normal Operation2 Flashes Pressure switch open with inducer on3 Flashes Pressure switch closed with inducer off4 Flashes Not Used5 Flashes Lockout from too many flame losses6 Flashes High temperature switch open7 Flashes Rollout switch open8 Flashes Flame present with gas off9 Flashes Gas valve stuck OFF or ON10 Flashes Flame sense circuit failure