York PHG6A24 Installation Manual

Also see for PHG6A24: Technical guide

5322625-UIM-A-0417Johnson Controls Unitary Products 23START-UPPrestart Check ListComplete the following checks before starting the unit.1. Check the type of gas being supplied. Be sure that it is the same aslisted on the unit nameplate.2. Make sure that the vent outlet air hood and air intake hood hasbeen properly installed.3. Set the airflow selection jumpers to the appropriate settings basedon external static pressures and heating temperature rise. See Fig-ure 10 and Table 6.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 appliance isequipped with an ignition device which automatically lights theburners.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 then smell gas,STOP! Follow B in the information on the unit safety label. If youdon'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 Turn Off GasTo Appliance and call your service technician or gas supplier.To Turn Off Gas To Unit1. Set the thermostat to the OFF position.2. Turn off all electric power to the appliance if service is to be per-formed.3. Remove the control access panel.4. Turn the gas valve switch to the OFF position. DO NOT FORCE.5. Replace the control access panel.Post Start Check ListAfter the entire control circuit has been energized and the heating sec-tion is operating, make the following checks:1. Check for gas leaks in the unit piping as well as the supply piping.2. Check for correct manifold gas pressures. See Checking Gas Input.3. Check the supply gas pressure. It must be within the limits shownon rating nameplate. Supply pressure should be checked with allgas appliances in the building at full fire. At no time should thestandby gas line pressure exceed 13.5", nor the operating pressuredrop below 4.5" for natural gas units. If gas pressure is outsidethese limits, contact the local gas utility for corrective action.FIGURE 10: Ignition Control Board,1'225%/2:(563(('7(673$'&21752/)86(/$67(5525%87721',$*1267,&/,*+7)/$0(&855(177(673$'%/2:(52))'(/$<$,5)/2:6(/(&7,21+,*++($7'(/$<+80,',67$76(/(&7,21+($738036(/(&7,21$02'(/,'3/8*