Navien NPN-160U User's Information Manual
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Navien NPN-160U User's Information Manual

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User's Information Manual
NPN Non-Condensing Water Heaters
NPN-160U
Model
NPN-180U
NPN-199U
NPN-120E
NPN-160E
NPN-180E
NPN-199E
WARNING
If the information in these instructions is not followed exactly, a fire or explosion may result,
causing property damage, personal injury or death.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
What to do if you smell gas
Do not try to light any appliance.
Do not touch any electrical switch; do not use any phone in your building.
Immediately call your gas supplier from a neighbor' s phone. Follow the gas supplier' s instructions.
If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service agency or the gas supplier.
The installation must conform with local codes or, in the absence of local codes, the National Fuel Gas
Code, ANSI Z223.1/NFPA 54.
When applicable, the installation must conform with the Manufactured Home Construction and
Safety Standard, Title 24 CFR, Part 3280.
Do not install this water heater in a recreational vehicle, trailer, boat or other vehicular type unit as it
will result in a Carbon Monoxide Poisoning Hazard.
Keep this manual near this water heater for future
reference whenever maintenance or service is required.
* The wetted surface of this product contacted by consumable
water contains less than one quarter of one percent (0.25%)
* Lead Free
of lead by weight.

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Summary of Contents for Navien NPN-160U

  • Page 1 User’s Information Manual NPN Non-Condensing Water Heaters NPN-160U Model NPN-180U NPN-199U NPN-120E NPN-160E NPN-180E NPN-199E Keep this manual near this water heater for future reference whenever maintenance or service is required. * The wetted surface of this product contacted by consumable water contains less than one quarter of one percent (0.25%)

  • Page 2: Table Of Contents

    Contents 1. Safety Information 2. About the Water Heater 2.1 Description of the Water Heater 2.2 Parts of the Water Heater 2.3 The Front Panel (Indoor Models Only) 2.4 Remote Controller (Outdoor Models - Optional for Indoor Models) 3. Operating the Water Heater 3.1 Turning the Water Heater On or Off 3.2 Adjusting the Water Temperature 3.3 Viewing Basic Information (Indoor...

  • Page 3: Safety Information

    1. Safety Information The following safety symbols are used in this manual. Read and follow all safety instructions in WARNING this manual precisely to avoid unsafe operating conditions, fire, explosion, property damage, If you do not follow these instructions exactly, personal injury, or death.
  • Page 4 DANGER DANGER This water heater’s water temperature is set to 120 °F (49 °C) at the factory for your safety and comfort. Increasing the temperature increases the risk of accidental scalding. Water temperatures at or above 125 °F (52 °C) can cause instant scalding, severe burns, or death.
  • Page 5 WARNING WARNING Do not operate this water heater without proper venting. Doing so may result in fire or carbon monoxide (CO) poisoning, which may result in property damage, personal injury, or death. Inspect the vent termination and air intake supply annually to ensure proper operation of the water heater.
  • Page 6 CAUTION CAUTION This water heater has been approved for use Do not attempt to repair or replace any part of the water heater, unless it is specifically in the USA only. recommended in this manual. Using the water heater in any other country For all other service, contact an authorized will void the manufacturer’s warranty.

  • Page 7: About The Water Heater

    2.1 Description of the Water 2.2.1 Bottom View Heater The NPN-series water heater is available in 7 models: NPN-160U, NPN-180U, NPN-199U, NPN-120E, NPN- 160E, NPN-180E, and NPN-199E. The main features are as follows: Potable domestic hot water and combination space heating Maximum temperature: 140 °F (60 °C)

  • Page 8: The Front Panel (Indoor Models Only)

    2.3 The Front Panel (Indoor Models Only) The front panel allows you to adjust the water temperature and view the operating status or error codes. Remove the protective sheet from the front panel before using it. Error Master Unit A code will appear on the display Cascade operation Hot Water Recirculation Display...

  • Page 9: Remote Controller (Outdoor Models - Optional For Indoor Models)

    2.4 Remote Controller (Outdoor Models - Optional for Indoor Models) LED indicator LCD display Indicates the status of Indicates functions and water heater. current status. - Green: Normal Mode. - Red: Error occurred. Preheat & Timer button Lock button - Access the timer settings. Locks the other button - Recirculation ON.

  • Page 10: Operating The Water Heater

    3. Operating the Water Heater WARNING Follow the instructions below to avoid unsafe operating conditions that could cause property damage, severe personal injury, or death. Ensure that the water heater is filled with water before turning on the water heater. If overheating occurs or the gas supply fails to shut off, shut off the gas supply to the water heater at the manual gas valve.

  • Page 11: Adjusting The Water Temperature

    3.2 Adjusting the Water Temperature WARNING Before adjusting the water temperature, read “To prevent burns:” on page 4 carefully. Water above 120 °F can cause instant scalding, severe burns, or death. The water heater is set to 120 °F (49 °C) by default. To adjust the water temperature: 1.

  • Page 12: Viewing Basic Information (Indoor Models Only)

    3.3 Viewing Basic Information 3.4 Resetting the Water Heater (Indoor Models Only) If an error message appears, you can try resetting the water heater to resolve the problem. To reset the To view information about the water heater, press water heater, press the Reset button. the Information button.

  • Page 13: Entering Lock Mode

    3.5 Entering Lock Mode 3.6 Setting the clock To prevent accidental pressing of the buttons and to 1. Press the Preheat & Timer button for 2 seconds. prevent children from adjusting the controller, you can activate the Temperature Lock Mode. To activate or deactivate Lock Mode, press the Lock button for 2 seconds.

  • Page 14: Setting The Recirculation Timer

    4. Press the OK button to finish and save the 2. Set the recirculation activation time by pressing updated time. the Up or Down button. Then, press the OK button to set the deactivation time. The recirculation timer settings are Note 3.7 Setting the Recirculation divided in 30 minute increments.

  • Page 15: Starting Recirculation

    4. Press the OK button to save the timer setting. 3.8 Starting Recirculation Repeat these procedures for Reservation Press the Preheat & Timer button to start Schedule Settings #2 and #3. recirculation immediately, regardless of the reservation schedule. “HEAT” appears for 4 seconds on the display and then recirculation runs once.

  • Page 16: Maintaining The Water Heater

    4. Maintaining the Water Heater 4.1 Cleaning the Water Heater CAUTION Make sure the water heater is turned off and the power supply is disconnected before cleaning the water heater. The water heater may remain hot for several minutes after it is turned off. To prevent burns, wait until the water heater has cooled down before cleaning.

  • Page 17: Flushing The Heat Exchanger

    4. Close the water supply valve on the inlet to the 9. When the water is completely drained, reinsert water heater. If there is no valve, turn off the the cold water inlet filter, and then close the water supply at the water main. water drain plug.
  • Page 18 5 minutes. d. Close the “A” valve and open the “C” valve. 11. Disconnect all tubes. Navien Easy valve Kit 12. Remove the cold water inlet filter from the water heater and clean out any residue. 13. Reinsert the filter and ensure the filter cap is securely tightened.

  • Page 19: Cleaning The Inlet Water Filter

    Freezing damage is most likely to occur due to back drafting caused by negative pressure in the building. This is not a manufacturing defect, and therefore, Navien will not warrant any damages due to freezing. The installer is responsible for ensuring that...
  • Page 20 To ensure that the water heater does not freeze, 5. Check every few minutes to see if water is follow these guidelines: running at the open faucet. Do not unplug the power supply cord, except for routine maintenance. The water heater has a freeze protection function that requires electricity.

  • Page 21: Troubleshooting

    5. Troubleshooting 5.1 Solving Basic Problems If you experience a problem with the water heater, refer to the following chart for possible remedies. Error codes that appear on the front panel display are explained in the following section. For minor problems, resetting the water heater may resolve the issue.

  • Page 22: Understanding Error Codes

    5.2 Understanding Error Codes When an error code appears on the front panel, refer to the following chart for a definition and possible remedy for the situation. Error Code Reason Self-diagnostic / Action Ensure that the main gas supply valve is open. E003 Ignition failure Ensure that the gas manifold and the fuel DIP...
  • Page 23 Error Code Reason Self-diagnostic / Action E517 Abnormal operation: DIP switch setting Contact Technical Support at 1-800-519-8794. E593 Abnormal operation: front panel key Contact Technical Support at 1-800-519-8794. E594 Abnormal operation: EEPROM Contact Technical Support at 1-800-519-8794. E615 Abnormal operation: input and memory Contact Technical Support at 1-800-519-8794.
  • Page 24 (3) years as indicated in warranty will be voided. the Warranty Coverage Periods table. Navien will pay labor charges for the repair subject to Navien’s prior written approval and in accordance with Navien’s schedule of approved labor allowances for a period of one (1) year from the date of installation.
  • Page 25 Navien. At Navien’s request, the defective Product high limit control. or part must be returned to Navien. When the Subjecting the heat exchanger to pressures or Product is installed in new construction, the date...
  • Page 26 BY STATE LAW IS LESS. No one is authorized to make any other warranties on behalf of Navien. Some states do not allow the exclusion or limitation of incidental or consequential damages, or how long an implied warranty lasts, so the above limitation may not apply to you.
  • Page 28 User’s Information Manual NPN Non-Condensing Water Heaters Getting Service If your water heater requires service, you have several options for getting service: Contact Technical Support at 1-800-519-8794 or on the website: www.navieninc.com. For warranty service, always contact Technical Support first. Contact the technician or professional who installed your water heater.

This manual is also suitable for:

Npn-180uNpn-199uNpn-120eNpn-160eNpn-180eNpn-199e

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