NORITZ NR50-OD (01) PDF MANUAL


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PDF Content Summary: TANKLESS GAS WATER HEATER Owner’s Guide Models: NR71-SV, NR71-OD* (For USA and Canada) NR66-SV, NR66-OD* (For USA and Canada) NR50-OD* (For USA only) * FOR USE IN RESIDENTIAL, COMMERCIAL, OR MANUFACTURED HOME APPLICATIONS. If the information in this manual is not followed exactly, a fire or explosion WARNING 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. 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 Rev. 01/11 *SBA8654* 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. Closely observe these warnings; they are critical to your safety. Icons warning of risk level This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

DANGER WARNING CAUTION DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

CAUTION used without the safety alert symbol indicates a potentially CAUTION hazardous situation which, if not avoided, may result in property damage. Other icons Be sure to do. Ground. Electric High

Shock. Temperature.

Prohibited Don’t Don’t Don’t touch

No flame. touch. DANGER disassemble the equipment. with a wet hand.

Vapors from flammable liquids will explode and catch fire causing death or severe burns. Do not use or store flammable products such as gasoline, solvents or Prohibited adhesives in the same room or area near the water heater.

Keep flammable products: 1. Far away from the water heater. 2. In approved containers. 3. Tightly closed. 4. Out of children’s reach. Vapors: 1. Cannot be seen. 2. Vapors are heavier than air. 3. Go a long way on the floor. 4. Can be carried from other rooms to the main burner by air currents.

Prohibited 2 Hot Water Heater temperatures over 125 °F 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. Temperature limiting valves are available, ask professional person. (Continued) (Continued) [NR71-SV, NR66-SV] Do not use the water heater if [NR71-OD, NR66-OD, NR50-OD] Do Not Install Indoors.

Prohibited the exhaust pipe is displaced, has holes, is clogged or is corroded. Prohibited This will cause carbon monoxide poisoning and a potential fire hazard. Indoor

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. Prohibited WARNING

No flame. A. This water heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner. Do not try to light the burner by hand. B. BEFORE OPERATING smell all around the water heater area for evidence of leaking gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor. 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. C. Use only your hand to turn the gas valve knob. Never use tools. If the knob will not turn by hand, don’ t try to repair it. Call a qualified service technician. Force or attempted repair may result in a fire or explosion. D. Do not use this water heater if any part has been under water. lmmediately call a qualified service technician to inspect the water heater and to replace any damaged parts. Be sure to do. Be sure to do. Prohibited High Temperature. When a gas leak is noticed: 1. Stop use immediately 2. Close the gas valve 3. [When installing indoors] Open windows and doors If you detect abnormal combustion or abnormal odors, or during an earthquake, tornado or fire: 1. Turn off the hot water supply 2. Turn off the power to the water heater 3. Turn off gas and water supply valve. 4. Call the nearest Noritz agent Explosion Hazard ; If the temperature and pressure relief valve is dripping or leaking, have a qualified service technician replace it. Do not plug or remove the valve. Failure to follow these instructions can re sult in fire or explosion, and personal injury or death. Check the temperature of the running hot water before entering the shower. Check the temperature before stepping into the bath tub. (Continued)

3 Important Safety Information-2 (Continued) WARNING

Prohibited Do not place the exhaust vent terminal in an indoor environment by means of adding walls and ceiling (Do not en close using corrugated sheets, etc.) Exhaust vent terminal Outdoor Unit Carbon monoxide poisoning or fire may occur as a result. Leave the proper clearance between the water heater and nearby objects (trees, Prohibited Prohibited Prohibited [NR71-SV, NR66-SV only] Carbon Monoxide Poisoning Hazard. Do not install this water heater in a mobile home, recreation vehicle or on a boat. [NR71-OD, NR66-OD, NR50-OD only] Carbon Monoxide Poisoning Hazard. Do not install this water heater in a recreational vehicle or on a boat. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. Do not place or use a spray can near the heater or the exhaust vent

Be sure timber, boxes with flammable materials etc.). Prohibited terminal.

to do. [When installing outdoors] Left side: Upper: Min. 36" Be sure Be sure the gas/power supplied matches the gas on the rating plate.

Min. 6" Right side: Min. 6" Front: Sug. 24" [When installing indoors (NR71-SV, NR66-SV)] Sug. 3" from Upper: Min. 12" to do. Ex. For Natural Gas NR71-SV NR71-SV 180,000 BTU 25,000 BTU177 4.0 670 10.5

vent pipe Left side: Min. 2" Right side: 0.55 2.25 15 150 2

Front: Sug. 24"* Min. 2"

Prohibited * Indicates suggested clearances for maintenance. Do not use combustible chemicals such as oil, gasoline, benzene etc. in the near the heater or the exhaust vent terminal. Do not place combustibles such as laundry, newspapers, oils etc. near the Be sure to do. Installation and service must be performed by a qualified installer, service agency or the gas supplier. [When installing indoors (NR71-SV, NR66-SV)] Prohibited heater or the exhaust vent terminal. Exhaust vent terminal (indoor installation) Unit Be sure to do. Check the air supply vent for dust or obstructions. air supply vent

Prohibited 4 If this unit will be installed in a beauty salon or other location where hair spray or aerosols will be used, locate the unit in a seperate area that is supplied with fresh air from outdoors. (Continued) (Continued) Do not use hair spray or spray detergent in the vicinity of the Contact Noritz before using with a solar pre-heater.

Prohibited Prohibited Don’t touch with a wet hand. Be sure to do. Don’t disassemble the equipment. heater. Do not allow small children to play unsupervised in the bathroom. Do not allow small children to bathe unsupervised. Do not touch the power cord with wet hands. Electric Shock. Consult the nearest Noritz agent if the water heater location needs to be changed. Contact a qualified service technician for any necessary repairs, service or maintenance. Be sure to do. California Proposition 65 lists chemical substances known to the state to cause cancer, birth defects, death, serious illness or other reproductive harm. This product may contain such substances, be their origin from fuel combustion (gas, oil) or components of the product itself. The gas conversion kit shall be installed by a qualified service agency in accordance with the manufacturer’s instructions and all applicable codes and requirements of the authority having jurisdiction. The information in the instructions must be followed to minimize the risk of fire or explosion or to prevent property damage, personal injury, or death. The qualified service agency is responsible for the proper installation of this kit. The installation is not proper and complete until the operation of the converted appliance is checked as specified in the manufacturer’s instructions supplied with the kit.

CAUTION

Ground. Be sure to electrically ground the unit. Keep power cord free of dust. Do not turn off the water heater while someone is bathing. Prohibited Do not cover the water heater and the exhaust vent terminal, store trash Be sure to do. Do not use the water heater for other than hot water supply, shower Prohibited and bath. Do not use a broken or modified power cord. Do not bind, bend or stretch power cords. Prohibited Prohibited or debris near it, or in any way block the flow of fresh air to the unit. Do not install in locations where excessive dust or debris will be in the air. Do not touch the exhaust vent (pipe, terminal) during or immediately after operation of the water heater.

ProhibitedDon’t

Be sure to do. Do not scratch, modify, or subject them to impact or force. To prevent burns or scalding, turn off the power button or power supply and wait until the equipment cools before performing maintenance. touch.

5 Important Safety Information-3 CAUTION

Do not drink water that has been inside the unit for an extended period of time. Do not drink the first use of hot water from the unit in the morning. Clean the filter on the water inlet as frequently as required by the quality of your local water. Keep the area around the unit clean. If boxes, weeds, cobwebs, cockroaches etc. are in the vicinity of the unit, damage or fire can result. Do not install the equipment where the exhaust will blow on walls or windows. If the water supply is in excess of 12 grains per gallon (200 mg/L) of hardness, acidic or otherwise impure, treat the water with approved methods in order to ensure full warranty coverage. Problems resulting from scale formation are not covered by the warranty. Check ignition during use and extinction after use. Do not run water through the unit when unit is not on. When discharging hot water, make sure the unit is ON. If water is run through the unit with the unit OFF, water may condense inside the unit and cause incomplete combustion or damage to the internal electrical components. For single-handle fixtures or valves, discharge water setting the handle completely to the water side. This unit is only approved for installation up to 4500 ft. (2000ft. for NR50-OD) above sea level. For installations at higher elevations, contact Noritz America for Instructions. Do not disassemble the remote controller. Do not use benzene, oil or fat detergents to clean the remote controller. This may cause deformation. Do not get the remote controller wet. Although it is water resistant, too much water can cause damage. Do not splash water on the remote controller. Do not expose the remote controller to steam. Do not locate the remote controller near stoves or ovens, this may cause damage or failure. Preventing damage from freezing ( p.18) Damage can occur from frozen water within the device and pipes even in warm environments. Be sure to read below for appropriate measures. Repairs for damage caused by freezing are not covered by the warranty. Take necessary measures to prevent freezing of water and leakage of gas when leaving the unit unused for long periods of time. ( p.19) If it is snowing, check the air inlet, exhaust gas vent and exhaust vent terminal for blockage. Do not use parts other than those specified for this equipment.

6 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 ........................................................ 12 Flow Meter Alarm ...................................................................................... 14 Muting the Remote Controller .................................................................. 16 Adjusting the Maximum Output Temperature ........................................ 17 Preventing Damage from Freezing ............................................................. 18 Regular Maintenance ................................................................................... 20 Troubleshooting ........................................................................................... 22 Follow-up Service ........................................................................................ 27 Specifications ............................................................................................... 29 7

General Parts NR71-SV, NR66-SV Main Unit

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 NR71-OD, NR66-OD, NR50-OD Outdoor Wall Mounted, Power Vented Model Exhaust Vent Front Cover Air Inlet Water Drain Valve (with Water Filter) (Inside Water Inlet) ( p.21) Pressure Relief Valve Water Supply Valve Gas Supply Valve * The above illustration shows an example of installation. The exact installation configuration may be slightly different. 8 (Ex. NR71-SV) (Ex. NR71-OD)

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.

Burner On Indicator When burning, the indicator is lit. ( p.13 and 15) Priority Indicator When this indicator is lit, the hot water temperature can be set. ( p.12) Temperature Setting (Ex.: 110°F) Flow Meter Setting The display will flash after hitting the flow meter alarm set button. ( p.15) Error Code A number will flash if a failure occurs. ( p.26) Setting Buttons For setting the hot water temperature, the flow meter alarm, and other settings. Power On/Off Button For turning the heater on and off. Flow Meter Alarm Set Button For setting the flow meter alarm. ( p.14 - 15)

* Before use, remove the protective sheet from the remote controller surface. 9 Initial Operation Before the first use of your water heater, make the following preparations. Follow steps1 through 4. 1Open the water supply valve.

CLOSED OPEN 2 Open a hot water fixture to confirm that water is available, and then close the fixture again. Hot water fixture

3Open the gas supply valve.

4 Turn on the power. Do not touch with wet hands. (Ex. NR71-SV)

10 How to Use (Not using the remote controller) Setting and Using the Water Heater The factory temperature setting is 120°F (fixed). Mix with cold water with a mixing valve or at the fixture for desired temperature. 1 Check that electrical power is connected.

2 4 Turn on hot water. Turn off the hot water. 3 Mix for desired temperature. Hot waterWater 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.

High Temperature Hot Water Heater temperatures over 125°F 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. Temperature limiting valves are available, ask professional person.

11 How to Use (Using the remote controller) Setting and Using the Water Heater 12 (Starting with the Power Off)

1 Press the Power On/Off Button. On

DANGER To prevent scalding: High Temperature The temperature will be displayed on the remote control thermostat. On Previous set temperature (Ex.: 110°F)

Hot Water Heater temperatures over 125°F 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. Temperature limiting valves are available, ask professional person. • When setting the unit to 125°F or higher, the temperature display will flash for 10 seconds and emit a tone as a high temperature warning. • Take caution when using the unit again after setting to 125°F or higher. Always check the set temperature before use. • Do not allow anyone to change the water temperature while hot water is running. Remote Controller Display Flashes for 10 sec

12 Turn on hot 2 water. 3 4 Set temperature. Turn off the hot ( )

Always check the temperature setting before use. Hot Cold Check the indicator lights. Water temperature water. On Off (°F: ) 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 ture can be set using the re mote controller. ( p.17) Contact the installer or Noritz America when setting the maximum output temperature in this range.

100 105 110 115 120 125 130 135 140 145 150 160

Washing Shower, hot water supply,

dishes, etc. High temperature etc. If fixtures incorporate mixing valves, *Initial factory setting is 110°F set the temperature higher than usual. * For most residential applications, the recommended setting temperature is 120°F or less. For applications that occasionally require a higher temperature setting, locate the remote controller in a convenient location. * Consult local codes for minimum operating temperatures. 13 How to Use (Using the remote controller) Flow Meter Alarm 2,3 1 3 (Starting with the power off) 1 ( )

Preparation 2Set temperature. Press the Power

On/Off Button Plug the bath drain. On Always check temperature setting before use. Hot Cold

The temperature will be displayed on the remote control thermostat. On Check the indicator lights.

Previous set temperature (example:110°F) Water temperature

14

An alarm will sound for ten seconds when the flow reaches the set level. The water will continue to run unless it is Water Temperature (°F: ) The temperatures settings below are only examples. The temperature setting necessary will depend on the usage, the length of piping and the time of year. 100 105 110 115 120 Warm Warmer Hot

manually turned off. * Initial factory setting: 110°F To set the flow meter alarm: Turn on hot 3 water. water when the 4 alarm sounds.

Adjust flow meter alarm setting. Press the flow meter alarm set button (the setting will flash on the display) and adjust with the setting buttons. Increase Decrease Choose the flow meter alarm setting from the following options: 10 - 60 (In 5Turn off the hot The alarm will sound when the set level has been reached. Stop the water.

5 gallon intervals), 70 - 100 (In 10 gallon intervals), or 990 gallons. The alarm will not sound if Note: The alarm will not sound if it is set for 990 gal.

Note: it is set for 990 gal. On Off

Flow meter setting will be flashing (ex. 45 gal.) * The level can only be adjusted while the indicator is flashing. * After ten seconds, the remote will again display the temperature. If the flow meter alarm is being used to indicate when a tub is full: • If any hot water is being used besides what is going into the tub, the alarm will sound before the tub is full. • If there was water in the tub before the fill began, or if the water is not shut off manually when the alarm sounds, the tub may overflow. • If there was water in the tub before the fill began, the temperature in the tub after it is full may be different from the temperature setting. 15 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

1 can be muted if it is desired. * Initial factory setting is with sound

1Hold the Power On/Off Button for five seconds. Muted Sound

No sound after 5 sec. • The flow meter alarm cannot be muted. Tone sounds after 5 sec.

• The high temperature warning tone when setting the unit to 125°F or higher will not emit a sound when muted. 16 How to Use (Using the remote controller) Adjusting the Maximum Output Temperature 31 2

1 Turn off the power. Off 2 Press and hold the flow meter alarm set button until a sound is heard (2 sec.). Tone sounds after 2 sec. 3Change the temperature using the setting buttons. Up Down The upper limit of the hot-water supply temperature can be changed to 100°F, 105°F, 110°F, 115°F, 120°F, 125°F, 130°F, 135 °F or 140°F.

Set the Power button to ON when continuing to use 4 the unit as is. Otherwise, let the unit sit for 30 sec. 17 Preventing Damage from Freezing CAUTION * Damage can occur from frozen water within the device and pipes even in warm environments. Be sure to read below for appropriate measures. * Repairs for damage caused by freezing are not covered by the warranty. [For Model Series NR66 and NR71 only] Freezing is prevented within the device automatically by the freeze-prevention heate (Model NR50-OD does not include this feature) Freezing cannot be prevented when the power plug is unplugged. Do not remove the power plug from the wall outlet. (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 (indoor installation) or -4°F (outdoor installation). * 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. <Only using the remote controller> (outside temperature including wind chill factor less than -30°F (indoor installation) or -4°F (outdoor installation)).

This method can protect not only the heater, but also the water supply, water piping and mixing valves. 1. Turn off the power. 2. Close the gas supply valve. 3. Open a hot water fixture, and keep a small stream of hot water running. (0.1 gal/minute or about 0.2" thick.) * If there is a mixing valve, set it to the highest level. Hot Water Fixture0.2" thick

4. The flow may become unstable from time to time. Check the flow 30 minutes later. * In general, it is not advisable to run water through the unit when it is OFF ( p. 6), but in this case freeze prevention is more important. * Remember to set mixing valves and fixtures to their original levels before using the unit again to prevent scalding. * If there is still a risk that the unit will freeze, drain the unit as shown on the next page. If water will not flow because it is frozen 1. Close the gas and water valves. 2. Turn off the power button. 3. Open the water supply valve from time to time to check whether water is running. 4. When the water is flowing again, check for water leaks from the equipment and piping before using. If the heater or the piping is frozen, do not use the heater or it may get damaged. 18 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. 1. Close the gas valve.

2. <Not using the remote controller> Fully open one of the hot water fixtures. <Using the remote controller> Turn off ther power button. 3. <Not using the remote controller> Fixture

Turn off the power supply after 20 seconds or more pass from operation of 2. Do not touch with wet hands. <Using the remote controller> Turn off the power supply. Do not touch with wet hands. 4. Close the water supply valve. Fixture 5. Fully open all hot water fixtures.

6. Turn the drain plug to the left to open, and then remove. 7. Check that the water is completely drained, close all the drain plugs and the hot water fixtures after 10 minutes or more pass from operation of 6. Drain Plugs Each drain plug mignt not be visible if insulation is installed around the piping.

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 p.10 “Initial operation”, steps 1 through 4. 19 Regular Maintenance Periodic Inspection CAUTION To prevent burns or scalding, turn off the power button or power supply and wait until the equipment cools before performing maintenance. Be sure to do.

Check For laundry, newspaper, timber, oil, spray cans and other combustible materials. Check For dust and soot in the exhaust vent or exhaust vent terminal.

Check Check Check Check For abnormal sounds during operation. For abnormalities in external appearance, discoloration or flaws. For proper operation of pressure relief valve. For water leaks from the equipment and piping. (Ex. NR71-SV) Check For dust or debris in the air inlet.

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. • Do not use benzene, oil or fatty detergents to clean the remote controller; deformation may occur. • The remote controller is water resistant but not water proof. Keep it as dry as possible. 20 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 equipment cools down before draining the water. The appliance will remain hot after it is turned off.

1. Close the water supply valve. 2. Open all hot water fixtures. 3. With a bucket ready, remove the inlet and outlet drain plugs (about 0.2 gal. will drain out) 4. Take the water drain valve (with water filter) out of the inlet. (See illustration to right). 5. Clean the water drain valve (with water filter) with a brush under running water. 6. Replace the water drain valve (with water filter) and close the drain plugs. (Take care not to lose the packing.) 7. Close all hot water fixtures. 8. Open the water supply valve and check that water does not leak from the drain plugs or water drain Inlet Packing Water drain valve (with water filter)

valve (with water filter). Water Supply Valve (Ex. NR71-SV) Optional Maintenance Isolation Valves * Isolation valves may be purchased as an accessory from Noritz. They allow for full diagnostic testing and easy flushing of the system. * The kit includes two full port isolation valves

Hot Water Service Valve Pressure Relief Valve Cold Water Service Valve and a pressure relief valve for the hot side. Contact Noritz for more information.

Drain Water Outlet Water Intlet (Ex. NR71-SV)

21 Troubleshooting-1 Initial Operation

Unit does not attempt to ignite when water is running. Unit attempts to ignite but fails Hot water is not available when a fixture is opened. No water is available when a fixture is opened. The hot water is not the correct temperature. (Using the remote controller) Water takes time to become hot when turning the hot water fixture. The water is too hot. The water is not hot enough. 22 • Check for reversed plumbing or crossed pipes. • Check the water drain valve filter. ( p.21) • Reset unit and try again. There may be air in the gas line. • Have a professional check the gas supply pressure. Temperature • Are the gas and water supply valves fully open? • 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?) • Is the water drain valve filter clogged? ( p.21) (Using the remote controller) • Is the power button turned on? • Is the water supply cut off? • Is the heater frozen? • Is the hot water fixture sufficiently open? • Have you allowed enough time for the cold water in the pipes to drain out? • Is the water supply valve fully open? (Using the remote controller) • Is the water temperature setting appropriate? ( p.12 and p.13) • If the water supply temperature is high, it is possible for the temperature to be higher than the temperature set on the remote controller. • If only a small amount of hot water is demanded, it is possible for the temperature to be higher than the temperature set on the remote controller. • Is the gas supply valve fully open? (Using the remote controller) • Is the water temperature setting appropriate? ( p.12 and p.13) • If the amount of hot water required is very high, it is possible for the temperature to be lower than the temp- erature set on the remote controller. Decrease the amount of hot water passing through the unit and the temperature should stabilize. (Continued) (Continued) The water is cold when only a single fixture is open. Fluctuations in hot water temperatures. (Using the remote controller) Setting temperature cannot rise. • The unit will not heat the water if the flow rate is less than 0.5 GPM. Open the fixture more or open other fixtures so that a greater flow passes through the unit, and the unit should begin heating again. • Clean the water filter of any debris ( p.21) (Using the remote controller) • Set water temperature at 115°F to 120°F. This will allow you to use a higher flow of hot water thus meeting the minimum flow requirement of 0.5 GPM. • Is the maximum temperature setting appropriate? ( p.17)

Amount of Hot Water

The amount of hot water at a certain fixture is not constant. The amount of hot water in the tub is less/more than the set amount. The flow meter alarm does not sound even when filled to the set amount. Amount of hot water available has decreased over time. • When hot water is demanded at other fixtures, the amount available may be reduced. The maximum flow available 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. • To keep the temperature stable, the heater limits the amount of water that can flow through it to a small amount initially, but the amount increases over time. • When hot water is used for other fixtures while filling the bath tub, the tub will not fill as much. • If there is water in the tub already, or when filling is stopped and restarted, the tub will fill more. • The flow meter alarm is set to sound when hot water is continuously discharged for the set volume of water. If mixing valves are used, or if cold water is mixed with hot water at the fixture, the tub will fill more than the setting of the flow meter alarm. • Is the water filter clogged? ( p.21) • If the supply water is hard and has not been treated, scale can build-up in the water heater and decrease the maximum amount of hot water available. Scale can be removed from the water heater by flushing the unit periodically. To prevent scale from forming in the water heater, a water softener or scale inhibitor is recommended.

23 Troubleshooting-2 Remote Controller

The light on the power button does not come on. The water temperature changes after a power failure or when the power is disconnected. The plastic on the surface or buttons of the remote controller has torn, peeled, or air bubbles inside. The fan can be heard after operation is stopped. A motor can be heard when turning the unit ON or OFF, when opening or closing a fixture, or after the unit has been running for a while. The Heater stops burning during operation. • Has there been a power failure? • Is the power connected properly? • The temperature setting and the flow meter alarm setting may both need to be reset after a power outage. • The surface of the remote controller is affixed with a protective sheet (to prevent surface scratching, etc.) at time of shipment. This sheet can be removed or left as it is. When leaving the protective sheet on, areas frequently touched may tear or peel. However, the remote controller will not malfunction from water entering such torn or peeled areas. To restore the appearance of the remote controller surface, simply remove the protective sheet. Sounds • These noises indicate the proper operation of devices which are designed to let the unit reignite more quickly, and ensure the water temperature is stable. Other • Are the gas and water supply valves fully open? • 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?)

White smoke comes out of the exhaust • This is normal. The white smoke is actually steam. vent (terminal) on a cold day. The hot water is turbid. • This is harmless. Small bubbles appear as the air in the water is heated and depressurized rapidly to atmospheric pressure.

The water appears blue The bath tub/wash-basin has turned blue 24 • Coloration to a blue color may be noticed from small traces of copper ion contained in the water and fat (furring). However, there are not problems concerning health. Coloration of the bath tub/wash-basin can be prevented by cleaning frequently.

åÃè·ï\é¶ÇÇ®í≤Ç◊Ç≠ÇæÇ≥Ç¢ åÃè·ï\é¶ÇÇ®í≤Ç◊Ç≠ÇæÇ≥Ç¢ Water Quality

Damage to the water heater as a result of poor water quality is not covered by the Limited Warranty. To ensure full warranty coverage, treat or condition water that exceeds the target levels provided in this table. Source: EPA National Secondary Drinking Water Regulations (40 CFR Part 143.3) Total Hardness* : 200 mg/L (12 gpg) or less Aluminum : 0.05 to 0.2 mg/L or less Chloride : 250 mg/L or less Copper : 1 mg/L or less Iron : 0.3 mg/L or less Manganese : 0.05mg/L or less pH : 6.5 - 8.5 Total Dissolved Solids : 500 mg/L or less 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.

25 Troubleshooting-3 åÃè·ï\é¶ÇÇ®í≤Ç◊Ç≠ÇæÇ≥Ç¢ åÃè·ï\é¶ÇÇ®í≤Ç◊Ç≠ÇæÇ≥Ç¢ Check for an Flashing Light on the Unit <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

ON OFF Unit abnormality Check whether the gas valve is open. Close the hot water fixture, and then open it again. If the lamp does not begin flashing again, the problem is solved.

åÃè·ï\é¶ÇÇ®í≤Ç◊Ç≠ÇæÇ≥Ç¢ åÃè·ï\é¶ÇÇ®í≤Ç◊Ç≠ÇæÇ≥Ç¢ Check for an Error Code <Using the remote controller> [Error displays on the remote controller] If there is a problem with the unit, a numerical error code will flash on the remote controller. If this occurs, take appropriate measures as listed below. When an error code appears, the display and the operation light will flash together. Flashing

Remote Controller Error Code Cause Action Ignition error Check whether the gas valve is open. Press the power button to turn the unit off, open a hot water fixture, and turn the unit back on. If the flashing number doesn't return the problem is solved.

Abnormal combustion, low gas supply pressure Have a professional check the gas supply pressure. Contact the nearest Noritz agent.

Abnormal combustion Contact the nearest Noritz agent. Contact Noritz America if: • Any other error code appears. • An error code is indicated again after the above actions were followed. • There are any other questions. 26 Follow-up Service-1 Requesting Service First follow the instructions in the troubleshooting section ( p.22 to p.26). If the error is not corrected, contact Noritz America Technical Support at 866-766-7489. We will need to know: The Model .................(check the rating plate) *See p.4 for the location of the label Date of purchase ......(see the warranty) Details of problem ....(flashing error codes, etc., in much detail as possible) Your name, address, and telephone number Desired date of visit * A request for service may be rejected if the water heater is installed in a location where working on the unit may be dangerous. Contact a plumber. Warranty A warranty registration card is included separately. Be sure that the plumber, date of purchase and other necessary items are filled in. 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. If you are not sure, consult the local utility company. 27 Follow-up Service-2 Gas Conversion If you move to a region that uses a different type of gas or if the local gas supply is converted,replacement of the gas manifold and adjustment of the appliance will be necessary. 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. For more information, contact Noritz America Technical Support at 866-766-7489. WARNING The gas conversion kit shall be installed by a qualified service agency* in accordance with the manufacturer’s instructions and all applicable codes and requirements of the authority having jurisdiction. The information in the instructions must be followed to minimize the risk of fire or explosion or to prevent property damage, personal injury, or death. The qualified service agency is responsible for the proper installation of this kit. The installation is not proper and complete until the operation of the converted appliance is checked as specified in the manufacturer’s instructions supplied with the kit. * A qualified service agency is any individual, firm, corporation, or company which either in person or through a representative is engaged in and is responsible for the connection, utilization, repair or servicing of gas utilization equipment or accessories; who is experienced in such work, familiar with all precautions required, and has compiled with all of the requirements of the authority having jurisdiction. Before the gas conversion is performed, verify the proper gas conversion kit with your water heater model on the table provided below. Conversion Kit Model Conversion Type CK-35 NR50-OD Propane to Natural Gas CK-36 NR50-OD Natural Gas to Propane CK-7 NR66-SV/NR66-OD Propane to Natural Gas CK-8 NR66-SV/NR66-OD Natural Gas to Propane CK-9 NR71-SV/NR71-OD Propane to Natural Gas 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. The gas pressure values at both the gas supply inlet fitting and at the manifold inlet on the unit are verified by the installer. Proper adjustments will be made to ensure safe and efficient operation. Once this is completed, a final gas leak check will be performed to confirm that all parts have been securely installed. If you notice the smell of gas at any time after the installation has been completed, turn the water heater off and contact your gas supplier immediately. 28 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 Specification Item

Model Name Type Installation Air Supply/Exhaust NR71-SV Indoor/ Outdoor, Wall Mounted Power Vented NR71-OD Outdoor, Wall Mounted Power Vented

Ignition Operating Pressure Minimum Flow Rate Dimensions Weight Water Holding Capacity Connection Sizes Power Supply Water Inlet Hot Water Outlet Gas Inlet Supply Direct Ignition 15-150 psi 0.5 GPM 23.6"(Height) x 13.8"(Width) x 6.7"(Depth) 41 lbs. 0.2 Gallon 3/4" 3/4" 3/4" 120 VAC (60Hz)

Consumption NG : 59W LP : 66W Freeze Prevention 141W NG : 46W LP : 50W Freeze Prevention 141W

Materials Safety Devices Casing Flue Collar Heat Exchanger Zincified Steel Plate/Polyester Coating Stainless Steel Copper Sheeting, Copper Tubing Flame Rod, Thermal Fuse, Lightning Protection De vice (ZNR), Overheat Prevention Device, Freezing Prevention Device, Fan Rotation Detector Accessories Anchoring Screws, Power Cord Performance Anchoring Screws Item Gas Consumption Maximum Hot Water Capacity Capacity Range * Default Temperature Options Temperature Settings (Using the remote controller) Maximum Performance Minimum Performance 45°F Rise NR71-SV NR71-OD NG : 180,000 btuh, LP : 180,000 btuh NG : 25,000 btuh, LP : 25,000 btuh 6.3 Gal./min. 0.5-7.1 Gal./min. 120, 130, 140°F (Original is 120°F) 100-150°F (In 5°F intervals), 160°F (12 Options)

* Minimum flow may vary slightly depending on the temperature setting and the inlet water temperature. 29

Specifications-2 Specifications Item Specification

Model Name Type Installation Air Supply/Exhaust NR66-SV Indoor/ Outdoor, Wall Mounted Power Vented NR66-OD Outdoor, Wall Mounted Power Vented

Ignition Operating Pressure Minimum Flow Rate Dimensions Weight Water Holding Capacity Connection Sizes Power Supply Water Inlet Hot Water Outlet Gas Inlet Supply Direct Ignition 15-150 psi 0.5 GPM 20.5"(Height) x 13.8"(Width) x 6.7"(Depth) 36 lbs. 0.2 Gallon 3/4" 3/4" 3/4" 120 VAC (60Hz)

Consumption NG : 54W LP : 59W Freeze Prevention 141W NG : 51W LP : 52W Freeze Prevention 141W

Materials Safety Devices Casing Flue Collar Heat Exchanger Zincified Steel Plate/Polyester Coating Stainless Steel Copper Sheeting, Copper Tubing Flame Rod, Thermal Fuse, Lightning Protection De vice (ZNR), Overheat Prevention Device, Freezing Prevention Device, Fan Rotation Detector Accessories Anchoring Screws, Power Cord Performance Anchoring Screws Item Gas Consumption Maximum Hot Water Capacity Capacity Range * Default Temperature Options Temperature Settings (Using the remote controller) Maximum Performance Minimum Performance 45°F Rise NR66-SV NR66-OD NG : 140,000 btuh, LP : 140,000 btuh NG : 20,000 btuh, LP : 20,000 btuh 5.3 Gal./min. 0.5-6.6 Gal./min. 120, 130, 140°F (Original is 120°F) 100-150°F (In 5°F intervals), 160°F (12 Options)

* Minimum flow may vary slightly depending on the temperature setting and the inlet water temperature. 30

Item Model Name Type Installation • 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 Specification NR50-OD Outdoor, Wall Mounted Ignition Operating Pressure Minimum Flow Rate Dimensions Weight Water Holding Capacity Connection Sizes Power Supply Materials Safety Devices Accessories Air Supply/Exhaust Water Inlet Hot Water Outlet Gas Inlet Supply Consumption Casing Flue Collar Heat Exchanger Power Vented Direct Ignition 15-150 psi 0.5 GPM 20.5"(Height) x 13.8"(Width) x 6.7"(Depth) 33 lbs. 0.2 Gallon 3/4" 3/4" 1/2" 120 VAC (60Hz) NG : 36W LP : 39W Zincified Steel Plate/Polyester Coating Stainless Steel Copper Sheeting, Copper Tubing Flame Rod, Thermal Fuse, Lightning Protection Device (ZNR), Overheat Prevention Device, Fan Rotation Detector Anchoring Screws

Item Performance NR50-OD

Gas Consumption Maximum Hot Water Capacity Capacity Range * Default Temperature Options Temperature Settings (Using the remote controller) Maximum Performance Minimum Performance 45°F Rise NG : 120,000 btuh, LP : 120,000 btuh NG : 19,000 btuh, LP : 20,000 btuh 4.2 Gal./min. 0.5-5.0 Gal./min. 130, 135, 140°F (Original is 120°F) 100-150°F (In 5°F intervals), 160°F (12 Options)

* Minimum flow may vary slightly depending on the temperature setting and the inlet water temperature. 31


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