Noritz NR71-SV Owner's Manual
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Noritz NR71-SV Owner's Manual

Tankless gas water heater
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TANKLESS GAS WATER HEATER
Owner's Guide
Models: NR71-SV, NR71-OD* (For USA and Canada)
* FOR USE IN RESIDENTIAL, COMMERCIAL, 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.
SBA8654
Rev. 01/11
NR66-SV, NR66-OD* (For USA and Canada)
NR50-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.
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.
When applicable, installation must conform with the Manufactured Home Construc-
tion and Safety Standard, Title 24 CFR, Part 3280 or the Canadian Standard CAN/
CSA-Z240 MH Mobile Homes, Series M86.(NR71-OD, NR66-OD only)
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
*SBA8654*

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  • Page 1 Safety Standard, Title 24 CFR, Part 3280 or the Canadian Standard CAN/ CSA-Z240 MH Mobile Homes, Series M86.(NR71-OD, NR66-OD only) Noritz America reserves the right to discontinue, or change at any time, the 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 (Continued) [NR71-SV, NR66-SV] [NR71-OD, NR66-OD, NR50-OD] Do not use the water heater if Do Not Install Indoors. the exhaust pipe is displaced, Prohibited Prohibited has holes, is clogged or is corroded. This will cause carbon monoxide poisoning and Indoor a potential fire hazard. Do not allow anyone to change the water temperature while hot water is being used. To prevent scalding, do not change the water temperature to a higher setting.
  • Page 4 Important Safety Information (Continued) WARNING Do not place the exhaust vent terminal [NR71-SV, NR66-SV only] in an indoor environment by means of Carbon Monoxide Poisoning Hazard. Do adding walls and ceiling (Do not en- not install this water heater in a mobile Prohibited Prohibited close using corrugated sheets, etc.) home, recreation vehicle or on a boat. Exhaust [NR71-OD, NR66-OD, NR50-OD only] vent terminal Carbon Monoxide Poisoning Hazard. Do not install this water heater in a Prohibited recreational vehicle or on a boat. Outdoor Unit Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
  • Page 5 (Continued) Do not use hair spray or spray Contact Noritz before using with detergent in the vicinity of the a solar pre-heater. heater. Prohibited Be sure to do. Do not allow small children to play California Proposition 65 lists chemical unsupervised in the bathroom. substances known to the state to cause cancer, Do not allow small children to bathe birth defects, death, serious illness or other Prohibited unsupervised. reproductive harm. This product may contain such substances, be their origin from fuel combustion Do not touch the power (gas, oil) or components of the product itself. cord with wet hands.
  • Page 6 Important Safety Information CAUTION This unit is only approved for installation Do not drink water that has been inside up to 4500 ft. (2000ft. for NR50-OD) above the unit for an extended period of time. Do sea level. not drink the first use of hot water from the For installations at higher elevations, contact Noritz unit 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 General Parts Main Unit ....................8 Remote Controller ..................9 Initial Operation .................... 10 How to Use (Not using the remote controller) Setting and Using the Water Heater ............11 How to Use (Using the remote controller) Setting and Using the Water Heater ............

  • Page 8: General Parts

    General Parts Main Unit NR71-SV, NR66-SV Indoor/Outdoor Wall Mounted, Power Vented Model Flue Collar Front Cover Air Inlet Water Drain Valve (with Water Filter) (Inside Water Inlet) p.21) Pressure Relief Valve Water Supply Valve Gas Supply Valve (Ex. NR71-SV) NR71-OD, NR66-OD, NR50-OD Outdoor Wall Mounted, Power Vented Model Exhaust Vent Front Cover Air Inlet...

  • Page 9: Remote Controller

    Remote Controller (RC-7649M) <Optional> The illustration below shows the remote controller display. What is actually displayed depends on how the water heater is set. Setting Buttons Burner On Indicator When burning, the For setting the hot indicator is lit. water temperature, p.13 and 15) the flow meter alarm, and other settings. Priority Indicator When this indicator is lit, the hot water temperature can be set. p.12) Power On/Off Button Temperature Setting...

  • Page 10: Initial Operation

    Follow steps Open the water supply valve. OPEN CLOSED Open a hot water fixture to confirm that water is available, and then close the fixture again. Hot water fixture Open the gas supply valve. Turn on the power. Do not touch with wet hands. (Ex. NR71-SV)

  • Page 11: How To Use (Not Using The Remote Controller)

    Check that electrical power is connected. Turn on hot water. Mix for desired temperature. Turn off the hot water. The electrical power does not need to be disconnected between uses. If you want to the temperature to be changed to 130°F or 140°F, contact the installer or Noritz. DANGER To prevent scalding. Hot Water Heater temperatures over 125°F can cause severe burns instantly or death from scalding. •...

  • Page 12: How To Use (Using The Remote Controller)

    How to Use (Using the remote controller) Setting and Using the Water Heater (Starting with the Power Off) Press the Power On/Off Button. The temperature will be displayed on the remote control thermostat. Previous set temperature (Ex.: 110°F) DANGER To prevent scalding: High Temperature Hot Water Heater temperatures over 125°F can cause severe burns instantly or death from scalding.
  • Page 13 The temperature settings below are examples. The temperature setting necessary depends on the usage, the length of piping and the time of year. The maximum output tempera- Contact the installer or Noritz ture can be set using the re- America when setting the mote controller.

  • Page 14: Flow Meter Alarm

    How to Use (Using the remote controller) Flow Meter Alarm (Starting with the power off) Set temperature. Press the Power Preparation Always check On/Off Button temperature setting before use. Plug the bath drain. Cold The temperature will be displayed on the remote control thermostat. Check the indicator lights.
  • Page 15 Water Temperature An alarm will sound for ten °F : seconds when the flow The temperatures settings below are only examples. The temperature setting necessary will depend on the usage, reaches the set level. the length of piping and the time of year. Warm Warmer The water will continue to run unless it is...

  • Page 16: Muting The Remote Controller

    How to Use (Using the 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/Off Button for five seconds.

  • Page 17: Adjusting The Maximum Output Temperature

    How to Use (Using the remote controller) Adjusting the Maximum Output Temperature Press and hold the flow Change the Turn off the meter alarm set button until temperature using power. a sound is heard (2 sec.). the setting buttons. Tone sounds after 2 sec.

  • 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*. For model NR50-OD, this procedure must be done to prevent freezing.

  • Page 19: Turning The Unit Back On

    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 equipment 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: Regular Maintenance

    Check pressure relief valve. For water leaks from the Check equipment and piping. (Ex. NR71-SV) Periodic Maintenance Equipment Wipe the outside surface with a wet cloth, then dry the surface. Use a neutral detergent to clean any stains. Remote Controller Wipe the surface with a wet cloth.

  • Page 21: Periodic Maintenance

    * The kit includes two full port isolation valves and a pressure relief valve for the hot side. Hot Water Service Valve Contact Noritz for more information. Cold Water Pressure Relief Valve Service Valve Drain (Ex. NR71-SV)

  • Page 22: Troubleshooting

    Troubleshooting-1 Initial Operation Unit does not attempt to ignite • Check for reversed plumbing or crossed pipes. when water is running. • Check the water drain valve filter. ( p.21) Unit attempts to ignite but fails • Reset unit and try again. There may be air in the gas line. •...

  • Page 23: Amount Of Hot Water

    The amount of hot water at a • When hot water is demanded at other fixtures, the amount available may be reduced. The maximum flow available certain fixture is not constant. from the NR50-OD is 4.2 GPM at a 45°F temperature rise. The maximum flow available from the NR66-SV, NR66-OD is 5.3 GPM at a 45°F temperature rise. The maximum flow available from the NR71-SV, NR71-OD is 6.3 GPM at a 45°F 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. • There are some types of hot water taps that discharges large volumes of hot water at first but stabilize after time.

  • Page 24: Remote Controller

    Troubleshooting-2 Remote Controller The light on the power button does • Has there been a power failure? not come on. • Is the power connected properly? The water temperature changes • The temperature setting and the flow meter alarm setting after a power failure or when the may both need to be reset after a power outage. power is disconnected.

  • Page 25: Water Quality

    Aluminum : 0.05 to 0.2 mg/L or less the Limited Warranty. To ensure full Chloride : 250 mg/L or less warranty coverage, treat or condition Copper : 1 mg/L or less water that exceeds the target levels Iron : 0.3 mg/L or less provided in this table. Manganese : 0.05mg/L or less : 6.5 - 8.5 Source: EPA National Secondary Drinking Water Total Dissolved Solids : 500 mg/L or less Regulations (40 CFR Part 143.3) Zinc : 5 mg/L or less Sulfate ion : 250 mg/L or less Residual chlorine : 4 mg/L or less * Maximum limit suggested by Noritz.
  • Page 26 Troubleshooting-3 Check for an Flashing Light on the Unit åÃè·ï\é¶Ç Ç®í≤Ç◊Ç≠ÇæÇ≥Ç¢ åÃè·ï\é¶Ç Ç®í≤Ç◊Ç≠ÇæÇ≥Ç¢ <Not using the remote controller> [Error displays on the lamp] (NR71-SV and NR71-OD only) If there is a problem with the unit, a lamp will flash on the front of the unit. If this occurs, take appropriate measures as listed below. Lamp Cause Action Check whether the gas valve is open.

  • Page 27: Follow-Up Service

    Read the content carefully, and keep the warranty card in a safe place. For repairs after the warranty period, there will be a charge on any service, and service will only be performed if the unit is deemed repairable. 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 original installation as follows: twelve (12) years for the heat exchanger and ten (10) years for remaining parts. Reinstallation If you want to reinstall the appliance at a different location, confirm that the gas and power supply indicated on the rating plate are available at the new location.

  • Page 28: Gas Conversion

    CK-10 NR71-SV/NR71-OD Natural Gas to Propane The following parts are supplied in the conversion kit. These items will replace the existing parts that are currently installed in the unit. Make sure that all parts are replaced and properly installed by a qualified service agency. * A Noritz remote controller and a digital gas manometer are required to complete the installation. Do not proceed if this equipment is not immediately available. Manifold Plate O-Ring Damper (NR71-SV, NR50-OD) Conversion Kit Label After the necessary parts have been replaced on the unit, the remote controller is then used to adjust the settings on the water heater for use with the proper gas type.

  • Page 29: 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 NR71-OD NR71-SV Installation Indoor/ Outdoor, Wall Mounted Outdoor, Wall Mounted Type Air Supply/Exhaust Power Vented Power Vented Ignition Direct Ignition Operating Pressure 15-150 psi 0.5 GPM...
  • Page 30 Specifications-2 Specifications Item Specification Model Name NR66-OD NR66-SV Installation Outdoor, Wall Mounted Type Indoor/ Outdoor, Wall Mounted Air Supply/Exhaust Power Vented Power Vented Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.5 GPM Dimensions 20.5"(Height) x 13.8"(Width) x 6.7"(Depth) Weight 36 lbs. Water Holding Capacity 0.2 Gallon Connection Sizes Water Inlet 3/4" Hot Water Outlet 3/4" Gas Inlet 3/4"...
  • Page 31 • 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 NR50-OD Installation Type Outdoor, Wall Mounted Air Supply/Exhaust Power Vented Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.5 GPM Dimensions 20.5"(Height) x 13.8"(Width) x 6.7"(Depth) Weight 33 lbs.

This manual is also suitable for:

Nr66-odNr71-odNr50-odNr66-sv

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