Noritz NRC663-FSV Owner's Manual
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Noritz NRC663-FSV Owner's Manual

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CONDENSING TANKLESS GAS WATER HEATER
Owner's Guide
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.
Low NOx Approved
by SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)
SBB809K
Rev. 08/14
Model : NRC663-FSV (EZTR40)
FOR USE IN RESIDENTIAL APPLICATIONS.
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.
Completely fill out the warranty registration card (included separately) and
mail the detachable portion to Noritz America Corporation.
Keep this manual (and the remainder of 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.
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
*SBB809K*

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  • Page 1 Installation must conform with local codes, or in the absence of local codes, the National Fuel Gas Code, ANSI Z223.1/NFPA 54. Low NOx Approved Noritz America reserves the right to discontinue, or change at any time, the by SCAQMD 14 ng/J or 20 ppm designs and/or specifications of its products without notice.

  • 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 Be sure some gas is heavier than air and to do. 1. Turn off the hot water supply will settle on the floor. 2. Turn off the power to the water WHAT TO DO IF YOU SMELL GAS. heater • Do not try to light any 3. Turn off gas and water supply appliance. valve • Do not touch any electrical 4. Call the nearest Noritz agent switch; do not use any phone in your building. Explosion Hazard ; • Immediately call your gas supplier from a neighbor’s If the temperature and pressure relief phone. Follow the gas supplier’s valve is dripping or leaking, have a Prohibited instructions. qualified service technician replace it. • If you cannot reach your gas Do not plug or remove the valve. supplier, call the fire department. C. Use only your hand to turn Failure to follow these instructions can result the gas valve knob. Never use...
  • Page 4 Do not store or use gasoline or other Do not touch the power cord flammable vapors and liquids in the with wet hands. vicinity of this or any other appliance. Prohibited Electric Don’t touch with a wet Shock. Do not place or use a spray can near hand. the water heater or the exhaust vent Consult the nearest Noritz agent if terminal. the water heater location needs to Prohibited be changed. Be sure to do. (Continued)
  • Page 5 (Continued) Contact a qualified service The gas conversion kit shall be installed by a qualified service agency in accordance with technician for any necessary the manufacturer’s instructions and all repairs, service or maintenance. Don’t applicable codes and requirements of the disassemble the unit. authority having jurisdiction. The information in the instructions must be Contact Noritz before using with followed to minimize the risk of fire or a solar pre-heater. explosion or to prevent property damage, Be sure personal injury, or death. The qualified to do. service agency is responsible for the proper installation of this kit. The installation is not California Proposition 65 lists chemical substances proper and complete until the operation of known to the state to cause cancer, birth defects, the converted appliance is checked as death, serious illness or other reproductive harm. specified in the manufacturer’s instructions This product may contain such substances, supplied with the kit. be their origin from fuel combustion (gas, oil) or components of the product itself. CAUTION Do not cover the water heater and Be sure to electrically ground the the exhaust vent terminal, store unit.
  • 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 3,500 ft. (1,050m) above sea level. drink the first use of hot water from the unit Do not disassemble the remote controller. in the morning. Clean the filter on the water inlet as Do not use benzene, oil or fat detergents to frequently as required by the quality of clean the remote controller. your local water. This may cause deformation. Keep the area around the unit clean. Do not get the remote controller wet. If boxes, weeds, cobwebs, cockroaches etc. are in Although it is water resistant, too much water can the vicinity of the unit, damage or fire can result. cause damage.

  • Page 7: Table Of Contents

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

  • Page 8: Unit Components

    Unit Components Unit Indoor Wall Mounted, Power Vented Model The condensing tankless gas water Flue Collar heater tends to show white steam. Pressure Relief Valve After the exhaust gas passes Water Supply Valve through the secondary heat exchanger, it becomes low in Water Drain Valve temperature and moisture rich (with Water Filter) which tends to produce steam (Inside Water Inlet) at the vent discharge terminal.

  • Page 9: Display Window

    Display Window The display window allows you to view the status of unit or error codes. (Display Window) 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 10: Initial Operation

    Initial Operation Before the first use of your water heater, make the following preparations. 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 11: 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 12: 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 13 and 16) the flow meter alarm, and other settings. Priority Indicator When this indicator is lit, the hot water temperature can be set.

  • Page 13: 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...
  • Page 14 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 15: 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 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: Preventing Damage From Freezing

    * The freeze prevention heaters will not prevent the plumbing external to the unit from freezing. Protect this plumbing with insulation, heat tape or electric heaters, solenoids, or pipe covers. If there remains a freezing risk, contact the nearest Noritz agent. Take the measures below for extremely cold temperatures*. <Only using the remote controller>...
  • Page 19 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. High Temperature Drain water into a bucket to prevent water damage.
  • Page 20 Preventing Damage from Freezing-2 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 10 “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 21: Regular Maintenance

    - Do not remove the air inlet filter. Be sure to do. If it is removed or damaged, please contact Noritz America. Damage caused by operating the water heater without the air inlet filter is not covered under warranty.

  • Page 22: Periodic Maintenance

    Regular Maintenance-2 Periodic Maintenance Unit Wipe the outside surface with a wet cloth, then dry the surface. Use a neutral detergent to clean any stains. If an external condensate neutralizer is installed, periodic replacement of the neutralizing agent will be required. Refer to the instructions supplied with the neutralizer for suggested replacement intervals.
  • Page 23 # = 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 24: Troubleshooting

    Heat Exchanger can be flushed. A, b, C, d, E, F 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 25 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 26 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 27 Amount of Hot Water Problems What to do Display Window The amount of hot water When hot water is demanded at other fixtures, the amount available may be reduced. at a certain fixture is not The maximum flow available is 4.9 GPM (18.7L/min.) constant.
  • Page 28 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 29 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 30: 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 31: Gas Conversion

    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 32: Specifications

    • 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 NRC663-FSV Type Installation Indoor Wall Mounted Air Supply/Exhaust Power Vented Ignition...

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Eztr40

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