Noritz NRC661A-DV Owner's Manual
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Noritz NRC661A-DV Owner's Manual

Condensing tankless gas water heater
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CONDENSING TANKLESS GAS WATER HEATER
Owner's Guide
FOR USE IN RESIDENTIAL OR MANUFACTURED HOME APPLICATIONS.
WARNING
- 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.
CERTIFIED
R
Low NOx Approved
by SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)
SBB8067-4
Rev. 01/17
Models : NRC711-DV (For USA and Canada)
NRC711-OD (For USA only)
NRC661A-DV (For USA and Canada)
NRC661A-OD (For USA only)
If the information in this manual is not followed exactly, a fire or explosion
may result causing property damage, personal injury, or death.
Thank you for purchasing this Noritz Tankless Gas Water Heater.
Before using, please:
Read this manual completely for operation instructions.
See the warranty registration card (included separately), and then visit
the Noritz website (www.noritz.com/warranty) to register your product.
Keep this manual (and the warranty registration card) where it can be
found whenever necessary.
Installation must conform with local codes, or in the absence of local
codes, the National Fuel Gas Code, ANSI Z223.1/NFPA 54 - latest edition
and/or the Natural Gas and Propane Installation Code CSA B149.1 -
latest edition.
When applicable, installation must conform with the Manufactured
Home Construction and Safety Standard, Title 24 CFR, Part 3280 or the
Canadian Standard CAN/CSA-Z240 MH Mobile Homes, Series M86.
Noritz America reserves the right to discontinue, or change at any
time, the designs and/or specifications of its products without notice.
NORITZ America Corporation
*SBB8067*

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Summary of Contents for Noritz NRC661A-DV

  • Page 1 Home Construction and Safety Standard, Title 24 CFR, Part 3280 or the (Natural Gas Only) Canadian Standard CAN/CSA-Z240 MH Mobile Homes, Series M86. Noritz America reserves the right to discontinue, or change at any time, the designs and/or specifications of its products without notice. NORITZ America Corporation SBB8067-4 Rev.

  • Page 2: Important Safety Information

    Important Safety Information-1 To prevent damage to property and injury to the user, the icons shown below will be used to warn of varying levels of danger. Every indication is critical to the safe operation of the water heater and must be understood and observed. Potential dangers from accidents during installation and use are divided into the following four categories.
  • Page 3 [NRC711-DV, NRC661A-DV] [When supplying combustion air Do not use the water heater from the indoors] Air supply vent if the intake/exhaust pipe is Towel Check whether or not the air Be sure Prohibited displaced, has holes, is to do. supply vent is blocked with clogged or is corroded. dust, trash, a towel, or the like. Blocking the opening may result [NRC711-OD, NRC661A-OD] in incomplete combustion. Do Not Install Indoors. This will cause carbon After the water heater has been out of Prohibited...
  • Page 4 Prohibited Carbon monoxide poisoning or fire may Do not place or use a spray can near occur as a result. the water heater or the exhaust vent terminal. [NRC711-DV, NRC661A-DV] Prohibited Do not place outdoors Confirm that the gas and Rain may enter the unit or the power supply indicated Prohibited burner fire may be blown by on the rating plate.
  • Page 5 Do not install in locations where excessive dust or debris will be in the air. Prohibited Be sure to do. Do not touch the exhaust vent pipe Do not use the water heater for and exhaust vent terminal during or other than hot water supply, shower immediately after operation of the Don’t and bath. water heater. touch. Prohibited [NRC711-DV, NRC661A-DV] [NRC711-OD, NRC661A-OD] Do not use a broken or modified power cord. Do not bind, bend or stretch power cords. Do not scratch, modify, or subject them to Prohibited impact or force. To prevent burns or scalding, turn off the power button and wait until the unit cools Do not use condensate, discharged before performing maintenance. from the drain pipe, for drinking or Be sure for consumption by animals. to do. Prohibited...
  • Page 6 Important Safety Information CAUTION Do not drink water that has been inside the This unit is only approved for installation up unit for an extended period of time. Do not to 4500 ft. (1350m) above sea level. drink the first use of hot water from the unit For installations at higher elevations, contact Noritz in the morning. America for Instructions. Clean the filter on the water inlet as Do not disassemble the remote controller. frequently as required by the quality of your local water. Do not use benzene, oil or fat detergents to clean the remote controller. Keep the area around the unit clean. This may cause deformation. If boxes, weeds, cobwebs, cockroaches etc. are in the vicinity of the unit, damage or fire can result.

  • Page 7: Table Of Contents

    Contents Important Safety Information ............... 2 Contents......................7 Overview of Condensing Tankless Gas Water Heater ......8 Unit Components ..................9 Display Window .................... 10 Initial Operation .................... 11 How to Use (Not using the remote controller) Using the Water Heater ................12 How to Use (Using the optional remote controller) Remote Controller .

  • Page 8: Overview Of Condensing Tankless Gas Water Heater

    Overview of Condensing Tankless Gas Water Heater This water heater is a high efficiency, fully condensing appliance. Unlike a traditional tankless water heater, a condensing type captures heat from the exhaust gas and uses it to preheat the incoming cold water as it passes through the secondary heat exchanger as illustrated below. Condensing Conventional Exhaust...

  • Page 9: Unit Components

    Unit Components Unit [NRC711-DV, NRC661A-DV] Indoor Wall Mounted, Power Vent/Sealed Model Intake Pipe Flue Collar Front Cover Water Drain Valve Display Window (with Water Filter) Displayed during (Inside Water Inlet) power "ON" or (Page 23) combustion. (Page 10) Two or three digit- number is displayed Pressure Relief Valve when a failure occurs. (Page 25)

  • Page 10: Display Window

    Display Window The display window allows you to view the status of unit or error codes. (Display Window) (Ex.NRC711-DV) When the gas burner is on. When the gas burner is on, set temperature's is displayed for one minute. When unit is initially plugged into power, set temperature's is displayed for approx. three minutes. When hot water flows. (When the gas burner is off, and cold water flows.) After one minute passed from turn on hot water, the outside edge of the three digit display will rotate in a circular pattern.

  • Page 11: Initial Operation

    Initial Operation Before the first use of your water heater, do the following: Please check the following when you use the water heater for the first time after the installation. Usually, the hot water is supplied by opening the hot water if gas, water, and electric power are supplied (if there is a remote controller, it should be turned ON).

  • Page 12: How To Use (Not Using The Remote Controller)

    Indicates the burner is off. The electrical power does not need to be disconnected between uses. If you want to the temperature to be changed to 130°F, 135°F or 140°F, contact the installer or Noritz. DANGER To prevent scalding. Hot Water Heater temperatures over 125°F(52°C) can cause severe burns instantly or death from scalding.

  • Page 13: How To Use (Using The Optional Remote Controller)

    How to Use (Using the optional remote controller) Remote Controller Optional Remote Controller (RC-7651M) If you want to change the temperature of supplied hot water frequently or you want to set the amount of hot water to accumulate the hot water, this remote controller is useful. What is actually displayed depends on how the water heater is set. Burner On Indicator Setting Buttons When burning, the For setting the hot indicator is lit. water temperature, (pages 14 and 16) the flow meter alarm, and other settings. Priority Indicator When this indicator is lit, the hot water temperature...

  • Page 14: Setting And Using The Water Heater

    How to Use (Using the optional remote controller) Setting and Using the Water Heater Press the Power On/ Off Button. The temperature will be displayed on the remote Previous set temperature control thermostat. (Ex.: 115°F) Set temperature. Check the indicator lights. Always check the temperature setting before use. ) Cold Water temperature When using °F mode: °F : The temperature settings below are examples.
  • Page 15 DANGER To prevent scalding: High Temperature Hot Water Heater temperatures over 125°F (52°C) can cause severe burns instantly or death from scalding. • Children, disabled and elderly are at the highest risk of being scalded. Feel water temperature before bathing or showering. Remote controller Display Temperature limiting valves are available, ask professional person. • When setting the unit to 125°F / 55°C (131°F) or higher, the temperature display will flash for 10 seconds and emit a tone as a high temperature warning.

  • Page 16: Flow Meter Alarm

    How to Use (Using the optional remote controller) Flow Meter Alarm When the display When the display Preparation Plug the bath drain. setting is in Fahrenheit. setting is in Celsius. (Starting with the power off) Press the Power On/Off Button. The temperature will be displayed on the remote control thermostat.
  • Page 17 Check the temperature An alarm will sound for ten before stepping into seconds when the flow the bath tub. reaches the set level. High Temperature. The water will continue to run unless it is manually turned off. If the flow meter alarm is being used to indicate when a tub is full: •...

  • Page 18: Muting The Remote Controller

    How to Use (Using the optional remote controller) Muting the Remote Controller The remote controller will emit a sound when any button is pushed. This sound can be muted if it is desired. * Initial factory setting is with sound Hold the Power On/ Sound Muted...

  • Page 19: Preventing Damage From Freezing

    Freezing will be prevented regardless of whether the operation switch is ON or OFF. * In normal operation, freezing is prevented within the device automatically unless the outside temperature without wind is below -30°F (-35°C) for NRC711-DV, NRC661A-DV or -4°F (-20°C) for NRC711-OD, NRC661A-OD.
  • Page 20 Preventing Damage from Freezing-2 If the water heater will not be used for a long period of time, drain the water. Drain the water as follows: CAUTION To avoid burns, wait until the unit cools down before draining the water. The appliance will remain hot after it is turned off.
  • Page 21 Turning the Unit Back On 1. Check that all drain plugs are inserted. 2. Check that all hot water fixtures are closed. 3. Follow the procedure on page 11 “Initial operation”, steps 1 through 4. 4. Make sure that the area around the appliance is well ventilated; open a window or a door if necessary. Then, operate the unit and verify that condensate is coming out of the drain pipe.

  • Page 22: Regular Maintenance

    Regular Maintenance-1 Periodic Inspection CAUTION To prevent burns or scalding, turn off the power button or power supply and wait until the unit cools before performing maintenance. Be sure to do. Air supply vent [When supplying combustion air from the indoors] For smear or blockage Check For dust and soot in...
  • Page 23 Periodic Maintenance Water Drain Valve (with Water Filter) If the water drain valve (with water filter) is covered with debris, the hot water may not run smoothly, or the unit may put out cold water. Check and clean the filter as explained below. * To avoid burns, wait until the unit cools down before draining the water.
  • Page 24 # = 1, 2, 3, 4, 5, 6, 7, 8, 9, A, b, C, d, E, F Damage to the water heater as a result of below is not covered by the Noritz America Limited Warranty. To ensure full warranty coverage, treat or condition water that exceeds the target levels provided in this table.

  • Page 25: Troubleshooting

    A, b, C, d, E, F by disconnecting electrical power until the Heat Exchanger can be flushed. before long.) Contact Noritz America for more information about flushing the Heat Exchanger. (866-766-7489) The unit detects the Scale The unit is locked because of repeated Scale Build-up error codes.
  • Page 26 The water may be mixed in the hot water plumbing. The hot water is not the correct temperature. The actual outlet water temperature is lower than the set temperature of the unit. Contact the nearest Noritz agent. Temperature Problems What to do Display Window...
  • Page 27 The actual outlet water temperature is lower than the set temperature of the unit. Contact the nearest Noritz agent. The water is cold when only The unit will not heat the water if the flow rate is less than 0.5 gallons (2L) per minute.
  • Page 28 The maximum flow available from the NRC711-DV, constant. NRC711-OD is 6.3 GPM (24.0L/min.), NRC661A-DV, NRC661A-OD is 4.9 GPM (18.7L/min.) at a 45°F (25°C) temperature rise. Pressure fluctuations and other plumbing conditions can cause the temperature and pressure at a fixture to be unstable, but it should stabilize after a short time.
  • Page 29 2000ft above sea level or for longer emitting from the unit or vent vent runs. Please contact your installer or Noritz to system. verify the unit dip switches are set correctly for your...
  • Page 30 Troubleshooting-4 Other Problems What to do Display Window Are the gas and water supply valves fully open? The Heater stops burning during operation. Is the water supply cut off? Is the hot water fixture sufficiently open? Is the gas being cut off by the gas meter? (Can other gas devices such as stoves be used?) (For LP) Is there enough gas in the tank? (Can other gas devices such as stoves be used?)

  • Page 31: Follow-Up Service

    Period of Time for Stocking Repair Parts Noritz will stock repair and maintenance parts for this unit for the time period from the date of the production date as follows: twelve (12) years for the heat exchanger and ten (10) years for remaining parts.
  • Page 32 This work must be performed by either Noritz or a qualified service agency and will be charged for even during the warranty period. The qualified installer will also be responsible for purchasing the gas conversion kit directly from the manufacturer.

  • Page 33: Specifications

    Specifications-1 • Specifications may be changed without prior notice. • The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. Specifications Item Specification Model Name NRC711-DV NRC711-OD Type Installation Indoor Wall Mounted Outdoor Wall Mounted Air Supply/Exhaust Power Vented Ignition...
  • Page 34 • Specifications may be changed without prior notice. • The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. Specifications Item Specification Model Name NRC661A-DV NRC661A-OD Type Installation Indoor Wall Mounted Outdoor Wall Mounted Air Supply/Exhaust...

This manual is also suitable for:

Nrc661a-odNrc711-dvNrc711-od

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