OPERATIONHEATER OVERVIEWCONTROL PANEL OVERVIEWNote: 'Central Control' LED is present on PRS-250CN and PRS-250CL commercial models only. Commercialmodels also have a remote Power LED and Filter LED located on the top of the heater (refer to "Central ControlConnection & Operation – Commercial Models Only" on page 20).TO TURN THE HEATER ONWarning: DO NOT OPERATE THE HEATER IF THE FLUE SYSTEM IS NOT CONNECTED OR IF ANY PARTOF THE FLUE SYSTEM IS FAULTY OR DAMAGED. Operation of the heater without the flue system or with faulty ordamaged flue components may cause combustion products to be discharged into the room in which the heater islocated resulting in serious injury or death. If you smell strange odours, shut down the heater immediately and phoneyour nearest Rheem Service department or Accredited Service Agent to arrange for an inspection.Warning: If you smell gas do not attempt to turn on the heater.• Switch on the electrical supply at the power point. The heater will perform a self check routine.• After the self check routine expires, the heater can be turned ON by pressing and releasing the heater ‘Power’button. The LED on the power button will illuminate green and the digital display will indicate the set temperatureand room temperature.The heater will operate automatically when a call for heat occurs (provided the heater is not operating in a timed OFFperiod) and the LED on the power button will change from green to red once ignition has been successful. Note:when first turned on the heater will operate in a pre warm cycle (burner on) for approximately 2 minutes regardless ofthe set and room temperatures.What to do if you smell gas?• DO NOT try to light any gas appliance.• DO NOT touch any electrical switch.• TURN OFF the gas supply at the gas meter immediately, call your gas supplier or licensed gasfitter.NOTE: Some gases are heavier than air and it may be necessary to check for gas leaks at floor level.8