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9

About the Water Heater

2.4     Remote Controller (Outdoor Models - Optional for Indoor  Models)

LCD display

Indicates functions and

current status.

LED indicator

Indicates the status of water 

heater.

- Green: Normal Mode. 

- Red: Error occurred.

Preheat & Timer button

- Access the timer settings.

- Recirculation ON.

Up button

Increase the temperature 

or value.

Down button

Decrease the temperature 

or value.

Lock button

Locks the other button 

operations.

Power button

Turns the remote controller

OK button

on or of f.

LCD display

Indicates functions and 

current status.

LED indicator

Indicates the status of 

water heater.

- Green: Normal Mode. 

- Red: Error occurred.

OK button

Confirms the selection.

Power button

Turns the remote 

controller on or off.

Lock button

Locks the other button 

operations.

Down button

Decrease the temperature 

or value.

Up button

Increase the temperature 

or value.

Preheat & Timer button

- Access the timer settings.

- Recirculation ON.

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 on the 

display.

Summary of Contents for NHW700

Page 1: ...e www navieninc com installers Contact a licensed professional for the affected system for example a plumber gas fitter or electrician When you contactTechnical Support please have the following infor...

Page 2: ...ble vapors and liquids in the vicinity of this or any other appliance WHATTO DO IFYOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your buildi...

Page 3: ...tion Indoor Models Only 12 3 4 Resetting theWater Heater 12 3 5 Entering Lock Mode 13 3 6 Setting the Clock 13 3 7 Setting the RecirculationTimer 14 3 8 Starting Recirculation 15 3 9 CancelingTimer Se...

Page 4: ...ou do not follow these instructions exactly a fire or explosion may result causing property damage personal injury or loss of life A This appliance does not have a pilot It is equipped with an ignitio...

Page 5: ...ider installing a thermostatically controlled mixing valve or temperature limiting valve Contact a licensed plumber or your local plumbing authority for more information DANGER This water heater is se...

Page 6: ...r heater is damaged Have your installer or plumber show you the location of the gas shut off valve and demonstrate how to close the valve If the water heater is damaged as a result of overheating fire...

Page 7: ...g so may result in product damage or personal injury Do not allow children to operate or access the water heater Doing so may result in product damage or personal injury Do not attempt to change the w...

Page 8: ...l recirculation The main features are as follows Potable domestic hot water and combination space heating Maximum temperature 140 F 60 C Stainless steel heat exchanger with stainless steel piping 2 2...

Page 9: ...er Unit A code will appear on the display Cascade operation b Hot Water Recirculation h Display Recirculation Mode c Diagnostics button i Up button For installers only Increases the temperature d Info...

Page 10: ...ller OK button on or off LCD display Indicates functions and current status LED indicator Indicates the status of water heater Green Normal Mode Red Error occurred OK button Confirms the selection Pow...

Page 11: ...l gas valve If any part of the water heater has been submerged in water do not use this appliance and immediately call a qualified service technician The water heater must be replaced 3 1 Turning the...

Page 12: ...ter 3 2 Adjusting the Water Temperature WARNING Before adjusting the water temperature read To prevent burns on page 4 carefully Water temperatures above 120 F can cause instant scalding severe burns...

Page 13: ...resetting the water heater does not solve the problem refer to the Troubleshooting section of this manual or contact Technical Support at 1 800 519 8794 3 3 Viewing Basic Information Indoor Models On...

Page 14: ...Lock Mode To prevent accidental pressing of the buttons and to prevent children from adjusting the controller you can activate the Temperature Lock Mode To activate or deactivate Lock Mode press the L...

Page 15: ...ided in 30 minute increments 3 Set the deactivation time by pressing the Up or Down button or 4 Press the OK button to finish and save the updated time 3 7 Setting the Recirculation Timer 1 Press the...

Page 16: ...e This feature runs during the recirculation time set on the front panel which the remote controller is connected to 3 9 CancelingTimer Settings Press and hold the Preheat Timer and OK button simultan...

Page 17: ...it as dry as possible 4 2 Draining the Water Heater You need to drain the water heater before performing maintenance tasks such as cleaning the inlet water filter or to prevent the water heater from...

Page 18: ...lug 11 To refill the water heater follow the steps of Draining the Water Heater in reverse 4 Close the water supply valve on the inlet to the water heater If there is no valve turn off the water suppl...

Page 19: ...s 5 gallons or larger Cleaning solution diluted with water 3 hoses A water circulation pump 4 3 Flushing the Heat Exchanger NOTICE Flushing the Heat Exchanger can be a difficult procedure Read the fol...

Page 20: ...5 Press the Power button on the front panel to turn on the water heater To flush the Heat Exchanger A A B B C C D D Navien Plumb Easy Valve Kit Cold Water Line Hot Water Line Circulation Pump Flushing...

Page 21: ...directly from the collars on the top of the water heater to the outdoors This type of vent system minimizes air movement within the water heater Thiswaterheaterhasanoptionalrecirculation pump that is...

Page 22: ...ntenance The water heater has a freeze protection function that requires electricity The freeze protection function will operate regardless of whether or not the power is turned on or off as long as t...

Page 23: ...a check valve on the recirculation return line Clean the cold water inlet filter See 4 4 Cleaning the Inlet Water Filter on page 20 Open the hot water faucet completely It takes too long for hot wate...

Page 24: ...the parts warranty will be reduced to three 3 years and the heat exchanger warranty to three 3 years as indicated in the Warranty Coverage Periods table Navien will pay labor charges for the repair s...

Page 25: ...licensed to complete the necessary repair The installer and or service provider must comply with Navien s warranty service and return policy procedures as available on Navien s website including cont...

Page 26: ...OF USE INCONVENIENCE OR LIABILITY ARISING FROM IMPROPER INSTALLATION SERVICE OR USE OF THE PRODUCT ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS ARISING UNDER STATE LAW ARE LIMITED IN DURATIO...

Page 27: ...Memo...

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