Noritz NR50-OD Service Manual

Also see for NRC111-DV: Installation manual Installation manual Owner's guide Instructional manual Installation manual

Noritz NR50-OD Service Manual Manual pdf 79 page image

79Circuit Board Settings 2Circuit Board Settings 1*Please follow either procedure after changing the fan motor.*When the water heater has no remote controller, make sure toconnect a remote controller before performing the below steps.Changing the Fan MotorCircuit Board"UP" and "DOWN" buttons foradjusting the manifold pressuresettings1. Check that there is no water flow.2. Within the first ten minutes of connecting electrical power, before turning it on (*1),press and hold both the "UP" and "DOWN" buttons on the Circuit Board as illustratedto the right until the controller emits a beeping sound. The setting will be not completedif this is not done."POWER"(Operation Button)Display(Setting Number.)[RC-7649M , RC-7650M]Display(Writer Number.)Remote Controller"UP"(Changing Setting Number)"FLOW METER ALARM SET"(Selecting Writer Number)1. Check that there is no water flow.2. Within the first ten minutes of connecting electrical power, before turning it on (*1),press and hold the "FLOW METER ALARM SET" button on the remotecontroller until a tone is heard (2 sec.) and "120"(example) appears on the display.3. Press the "FLOW METER ALARM SET" button to change the writer numberuntil "11 1" appears on the display.4. Press the "UP" button for 5 sec to change the setting number from "1" to "2"."11 2"appears on the display.5. Set the "POWER" button to ON or let the unit sit for 30 seconds.Note 1. Disconnect electrical power after setting the "POWER" button off on theremote controller.The water heater will automatically turn on when electrical power is reconnectedif this step is not followed.Note 1. Disconnect electrical power after setting the "POWER" button off on the remotecontroller. The water heater will automatically turn on when electricalpower is reconnected if this step is not followed.A : Fan motorB : Bell-mouthC : Tapping Screw x 3DOWNUPFLOW METERALARM SETON/OFFPOWERWARNINGor bath.RC-7649Minstantly or death from scalding.over 125 F can cause severe burnsHot Water Heater temperatureCheck actual and controller waterbefore using this appliance.BURNER ONPRIORITYPlease read instructions carefullygal.temperature before entering showerCA BWhen Bell-mouth(B) is installed in the old fan motor, install Bell-mouth (B) as shown in figure to maintain the proper air volume.When you change the fan motor, please remove this part from the old fan motor, and install in the new fan motor.After changing the fan motor, please follow the procedure "Circuit Board Settings 1" or "Circuit Board Settings 2".The water heater will not operate properly unless you carry out this step.