Navien NR-20DU User Manual Download Page 24 | Manualshive

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Navien NR-20DU User Manual Download Page 24

23

Additional features for Cascade systems

Standby feature before On/Off
This feature allows the system to stand by until the

Power is switched to On or Off.
"WAIT" is displayed while 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. In this case, you cannot control or

change the settings.
Connect the remote controller to the Master panel

correctly.

Note

This is applied to models with Cascade

systems only.

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Summary of Contents for NR-20DU

Page 1: ...enAmerica com BG E MU 10 01 20024184A Navien America Inc 20 Goodyear Irvine CA 92618 TEL 949 420 0420 FAX 949 420 0430 Downloaded from https gadgetsgo com NR 20DU instant efficient hot heating boiler...

Page 2: ...p this manual near this remote controller for future reference whenever maintenance or service is required NR 20DU Downloaded from https gadgetsgo com NR 20DU instant efficient hot heating boiler rc h...

Page 3: ...Lock Mode 12 Setting the clock 13 Setting the Recirculation timer 15 Canceling all timer settings 18 Setting the initial number of activating units for Cascade systems 19 Setting the temperature of DH...

Page 4: ...ese instructions exactly a fire or explosion may result causing property damage personal injury or loss of life Indicates an imminently hazardous situation which if not avoided could result in severe...

Page 5: ...s 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 Wall Mounting Bracket Downloaded from ht...

Page 6: ...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 controller...

Page 7: ...e 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 bracket by aligning the hooks Downloaded from h...

Page 8: ...d Error occurred Timer button Access the timer settings Up button Increase the temperature or value Down button Decrease the temperature or value Lock button Locks the other button operations Power bu...

Page 9: ...Hot water is in use Displays the current set temperature Water heater operation is in progress Operations are locked An error code will appear on the display Operating in energy saving mode Downloaded...

Page 10: ...isplay 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 Cascade mode The backlight stays on for 8 s...

Page 11: ...nges by 1 F 0 5 C Level 2 120 140 F 50 60 C Press and hold the Up button for 2 seconds to increase the temperature by 5 F 2 C Press the Down button to decrease the temperature by 5 F 2 C To save the t...

Page 12: ...et temperature before using hot water Press the Up button for 5 seconds to increase the temperature by 10 F 5 C and press the Down button to decrease the temperature by 10 F 5 C Note Commercial Warran...

Page 13: ...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 Note Resetting errors or alarms is still av...

Page 14: ...lock 1 2 or Press the Timer button Adjust the minutes by pressing the Up or Down Button Press the OK button to set the minutes Downloaded from https gadgetsgo com NR 20DU instant efficient hot heating...

Page 15: ...he minutes are set adjust the hour by pressing the Up or Down button Press the OK button to finish and save the updated time Downloaded from https gadgetsgo com NR 20DU instant efficient hot heating b...

Page 16: ...ce to set the Recirculation timer Reservation Schedule 1 is ready to be set Set the recirculation activation time by pressing the Up or Down button Press the OK button to set the deactivation time Not...

Page 17: ...16 3 or 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...

Page 18: ...17 5 During the reservation schedule the preheating icon turns on and the Reservation area starts flashing Note This is applied to A models with the preheating function only...

Page 19: ...18 Canceling all timer settings 2sec Press and hold the Timer and OK button simultaneously for 2 seconds CLR appears for 3 seconds and all timer settings are canceled...

Page 20: ...2 seconds with the Power off The number of initial activating water heaters is displayed Note The maximum number of units in a cascade system is 16 Press the Up or Down button to adjust the number of...

Page 21: ...1 Press the OK button to switch to Cascade Off UNIT temperature settings mode Note Setting value ranges from 0 to 60 The water heater will operate more frequently when this value is lower Determine t...

Page 22: ...perature for Cascade On Unit Press the Up or Down button to adjust the value by 1 Press the OK button to switch to Stop temperature settings mode S Ft and the corresponding value are displayed Note Se...

Page 23: ...or Down button to adjust the value by 1 Press the OK button to finish the settings and exit the settings Note Setting value ranges from 0 to the set temperature The actual temperature is calculated a...

Page 24: ...d while 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 erro...

Page 25: ...ontroller 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 R...

Page 26: ...isplayed 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...

Page 27: ...esolve 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 ou...

Page 28: ...ean the cold water 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...

Page 29: ...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 30: ...rt 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 sho...

Page 31: ...witch See the Installation manual E593 Abnormal 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 87...

Page 32: ...Memo...

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