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NR-21DU

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Summary of Contents for NR-21DU

Page 1: ...NR 21DU...

Page 2: ...troller On or Off Setting the water temperature 14 Starting Recirculation 15 Entering High Temperature Mode Commercial Mode 16 Entering Lock Mode 17 Setting the clock 18 Setting the Recirculation time...

Page 3: ...or future reference If you do not follow these instructions exactly a fire or explosion may result causing property damage personal injury or loss of life Indicates an imminently hazardous situation w...

Page 4: ...find the following items with the remote controller Check the box for each of the following items before installing the remote controller User Manual Extension Cable 2 Tapping Screws Multi Remote Cont...

Page 5: ...ort on the front panel of the water heater 2 Pass the other end of the extension cable through the hole in the bracket 3 Connect the end of the extension cable to the cable connected to the remote con...

Page 6: ...Bracket 1 Affix the bracket securely to the wall by fastening 2 screws to the wall or to the 2 holes in the wall receptacle On the wall In the wall receptacle 2 Hang the remote controller on the brac...

Page 7: ...of water heater Green Normal Mode Red Error occurred Preheat Timerbutton Access the timer settings Recirculation ON Up button Increase the temperature or value Down button Decrease the temperature or...

Page 8: ...Timer is set Recirculation Mode Displays the current time Hot water is in use Displays the current set temperature Water heater operation is in progress Operations are locked An error code will appear...

Page 9: ...9 Multi Remote Controller System 9...

Page 10: ...10 Multi Remote Controller System 10...

Page 11: ...11 Multi Remote Controller System 11...

Page 12: ...12 Multi Remote Controller System 12...

Page 13: ...13 Multi Remote Controller System 9 13...

Page 14: ...Power button When the power is on The LCD display turns on The LED indicator turns green Hot water temperature is displayed Note When an error occurs the LED indicator turns RED and blinks except for...

Page 15: ...F 36 60 C NPN Non Condensing Water Heaters Range 98 140 F 36 60 C NPE A2 S2 Condensing Water Heaters Range 97 140 F 36 60 C Press the Up or Down button to adjust the temperature The temperature chang...

Page 16: ...t water Press the Up button to increase the temperature by 1 F 0 5 C and press the Down button to decrease the temperature by 1 F 0 5 C Note Commercial Warranty applies when this mode is used Refer to...

Page 17: ...ture Lock Mode To activate or deactivate Lock Mode press the Lock button for 2 seconds When Lock Mode is activated The Lock icon appears on the display All buttons except for Lock button are locked No...

Page 18: ...lation During the recirculation when NPN Non condensing water heaters are connected The preheating icon flashes continuously when NPE A2 S2 condensing water heaters are connected The preheating icon k...

Page 19: ...ress the Timer button for 2 Seconds Setting the clock is available only when NPN Non condensing water heaters are connected Adjust the minutes by pressing the Up or Down Button Press the OK button to...

Page 20: ...3 4 Once the minutes are set adjust the hour by pressing the Up or Down button Press the OK button to finish and save the updated time 20...

Page 21: ...eady to be set Set the recirculation activation time by pressing the Up or Down button Press the OK button to set the deactivation time Note The recirculation timer settings are divided in 30 minute i...

Page 22: ...3 4 Set the deactivation time by pressing the Up or Down button Press the OK button to save the timer setting Repeat these procedures for Reservation Schedule Settings 2 and 3 22...

Page 23: ...5 During the reservation schedule the preheating icon turns on and the Reservation area starts flashing 23...

Page 24: ...s and hold the Timer and OK button simultaneously for 2 seconds CLR appears for 3 seconds and all timer settings are canceled Note Canceling all timer settings is available only when NPN Non condensin...

Page 25: ...hile the entire Cascade water heater is powered ON or OFF System info on the Slave panel When the remote controller is connected to the wrong panel its ID is displayed on the LCD display as an error I...

Page 26: ...roller along with the associated error code The error code is displayed in 3 digits see below Reset errors After the problems that are causing the errors are resolved press the OK button once and RST...

Page 27: ...layed You can change the scale warning intervals if desired Deactivating the scale alarm Press and hold the OK button for 2 seconds RST is displayed for 3 seconds For Cascade systems The following is...

Page 28: ...lve the problem contact an authorized technician a licensed professional or Navien Technical Support at 1 800 519 8794 for service instructions Problem Possible Cause s What to do No water comes out w...

Page 29: ...ater inlet filter See 4 4 Cleaning the Inlet Water Filter and Recirculation Inlet Filter in the Operation manual Open the hot water faucet completely If an error code is displayed refer to the Error C...

Page 30: ...at least 30 minutes and then restart it Clean the cold water inlet filter See the Operation manual Flush the heat exchanger See the Operation manual E030 Exhaust overheating the water heater shuts do...

Page 31: ...hort circuit Contact Technical Support at 1 800 519 8794 E421 Cold water inlet1 thermostat open or short circuit Contact Technical Support at 1 800 519 8794 E432 Cold water inlet2 thermostat open or s...

Page 32: ...ormal operation front panel key Contact Technical Support at 1 800 519 8794 E615 Abnormal operation input and memory Contact Technical Support at 1 800 519 8794 E736 Abnormal operation cascade communi...

Page 33: ...Memo 33...

Page 34: ...34 Memo...

Page 35: ...35 Memo...

Page 36: ...20051848A www navieninc com Navien America Inc 1 800 519 8794 20 Goodyear lrvine CA 92618 TEL 949 420 0420 FAX 949 420 0420...

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