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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.
Low NOx Approved
by SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)
SBB8065-2
Rev. 08/15
Models : NR662-OD
NR501-OD
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 - latest edition.
When applicable, installation must conform with the Manufactured
Home Construction and Safety Standard, Title 24 CFR, Part 3280.
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
*SBB8065*
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Related Manuals for Noritz NR662-OD-LP
Summary of Contents for Noritz NR662-OD-LP
- Page 1 When applicable, installation must conform with the Manufactured Home Construction and Safety Standard, Title 24 CFR, Part 3280. 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 SBB8065-2 Rev.
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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 Upper: If you detect abnormal combustion Min. 36" (900mm) or abnormal odors, or during an Left side: earthquake, tornado or fire: Right side: Min. 6" (150mm) Be sure 1. Turn off the hot water supply Min. 6" (150mm) to do. 2. Turn off the power to the water Front: heater Sug. 24" (600mm) 3. Turn off gas and water supply valve Indicates suggested clearances for maintenance. 4. Call the nearest Noritz agent (Continued)
- Page 4 Do not allow small children to play unsupervised in the bathroom. Unit Do not allow small children to bath unsupervised. Prohibited Do not touch the power cord Carbon Monoxide Poisoning Hazard. with wet hands. Do not install this water heater in a recreational vehicle or on a boat. Electric Prohibited Don’t touch with a wet Shock. hand. Do not use combustible chemicals such Consult the nearest Noritz agent if as oil, gasoline, benzene etc. in the near the heater or the exhaust vent terminal. the water heater location needs to Prohibited be changed. Be sure Do not store or use gasoline or other to do. flammable vapors and liquids in the Contact a qualified service vicinity of this or any other appliance. technician for any necessary Prohibited repairs, service or maintenance. Do not place or use a spray can near Don’t disassemble the water heater or the exhaust vent the unit.
- Page 5 CAUTION Be sure to electrically ground the Do not turn off the water heater unit. while someone is bathing. Prohibited Ground. Keep power cord free of dust. Do not cover the water heater and the exhaust vent terminal, store trash or debris near it, or in any way Prohibited Be sure block the flow of fresh air to the unit. to do. Do not use the water heater for Do not install in locations where other than hot water supply, shower excessive dust or debris will be and bath. in the air. Prohibited Prohibited Do not use a broken or modified power cord. Do not touch the exhaust vent Do not bind, bend or stretch power cords. terminal during or immediately after Do not scratch, modify, or subject them to operation of the water heater. Prohibited impact or force. Don’t touch. To prevent burns or scalding, turn off the power button and wait until the unit cools before performing maintenance. Be sure to do.
- 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.
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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 ..................12 Setting and Using the Water Heater ............13 Adjusting the Maximum Output Temperature ........14 Flow Meter Alarm ..................16 Muting the Remote Controller ..............18 Preventing Damage from Freezing ............. 19 Regular Maintenance ................... 21 Troubleshooting ................... -
Page 8: Unit Components
Unit Components Unit Outdoor Wall Mounted, Power Vented Model Exhaust Vent Front Cover Display Window Displayed during power "ON" or Water Drain Valve combustion. (page 9) (with Water Filter) Two or three digit- (Inside Water Inlet) number is displayed (page 22) when a failure occurs. (page 24) Pressure Relief Valve Water Supply Valve Gas Supply Valve (Ex.NR662-OD) * The above illustration shows an example of installation. The exact installation configuration may be slightly different. -
Page 9: Display Window
Display Window The display window allows you to view the status of unit or error codes. (Display Window) (Ex.NR662-OD) 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. -
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) Power On/Off Button Temperature Setting... -
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 When using °F mode: °F : The temperature settings below are examples. The temperature setting necessary depends on the usage, the length of piping and the time of year. -
Page 14: Adjusting The Maximum Output Temperature
How to Use (Using the optional remote controller) Adjusting the Maximum Output Temperature Turn off the Power On/Off Button. Press and hold the flow Tone sounds meter alarm set button after 2 sec. until a sound is heard (2 sec.). Change the temperature using the setting buttons. Down The upper limit of the hot-water supply temperature can be changed to (For Fahrenheit (°F)) 115°F, 120°F, 125°F, 130°F, 135°F or 140°F. (For Celsius (°C)) 46°C, 47°C, 48°C, 50°C, 55°C or 60°C. - 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.
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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: •...
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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/ Muted Sound... -
Page 19: 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 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.
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Page 21: 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. For laundry, newspaper, Check timber, oil, spray cans and other combustible For dust and soot in materials near the heater Check... - Page 22 Regular Maintenance-2 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 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.
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Page 24: 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 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 unit will not heat the water if the flow rate is less The water is cold when only 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. The maximum flow at a certain fixture is not available from the NR662-OD is 5.3 GPM (20L/min.) constant.
- Page 28 The unit may need adjustments done for installations start up or during operation higher than 2000ft above sea level. Please contact emitting from the unit. your installer or Noritz to verify the unit dip switches are set correctly for your installation. Other Problems...
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Page 29: 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 30 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.
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Page 31: 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 NR662-OD Type Installation Outdoor Wall Mounted Air Supply/Exhaust Power Vented Ignition Direct Ignition... - Page 32 Specifications-2 • 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 NR501-OD Type Installation Outdoor Wall Mounted Air Supply/Exhaust Power Vented Ignition Direct Ignition...