TANKLESS GAS WATER HEATER Owner’s Guide Model NR83-DVC FOR USE IN RESIDENTIAL APPLICATIONS. WARNING If the information in this manual is not followed exactly, a fire or explosion 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.
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.
(Continued) Prohibited Do not use the water heater if the concentric pipe is displaced, has holes, is clogged or is corroded. Prohibited 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. 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.
Important Safety Information-2 (Continued) WARNING Prohibited Do not place the flue terminal in an indoor environment by means of adding walls and ceiling (Do not enclose using corrugated sheets, etc.) Prohibited Carbon Monoxide Poisoning Hazard. Do not install this water heater in a mobile home, recreational vehicle or on a boat. Prohibited Do not use combustible chemicals such as oil, gasoline, benzene etc. in the near the heater or the flue terminal.
(Continued) Prohibited Do not allow small children to play unsupervised in the bathroom. Do not allow small children to bath unsupervised. Do not touch the power cord with wet hands. Don’t touch with a wet hand. Be sure to do. Don’t disassemble the equipment. 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. Contact Noritz before using with a solar pre-heater.
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. This unit is only approved for installation up to 4500 ft. (1350m) above sea level. Clean the filter on the water inlet as frequently as required by the quality of your local water. Do not disassemble the operation panel. Keep the area around the unit clean. This may cause deformation.
Contents Important Safety Information ....................................................................... 2 Contents......................................................................................................... 7 General Parts Main Unit .................................................................................................... 8 Operation Panel......................................................................................... 9 Initial Operation ................................
General Parts Main Unit Indoor Wall Mounted, Power Vent/Sealed Model Concentric Pipe Front Cover Operation Panel Water Drain Valve (with Water Filter) Pressure Relief Valve (Inside Water Inlet) ( p.20) Gas Supply Valve Water Supply Valve * The above illustration shows an example of installation. The exact installation configuration may be slightly different.
Operation Panel (RC-7651M) What is actually displayed depends on how the water heater is set. Burner On Indicator Setting Buttons When burning, the indicator is lit. ( p.13 and 15) For setting the hot water temperature, the flow meter alarm, and other settings. Priority Indicator When this indicator is lit, the hot water temperature can be set. ( p.12) Temperature Setting (Ex.:110°F) Power On/Off Button For turning the heater on and off.
Initial Operation Before the first use of your water heater, make the following preparations. Follow steps 1 through 4. 1 CLOSED 2 Open a hot water fixture to confirm that water is available, and then close the fixture again. Open the water supply valve. OPEN Hot water fixture 10 3 Open the gas supply valve. 4 Turn on the power. Do not touch with wet hands.
How to Use Muting the Operation Panel 1 1 The operation panel 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. Muted No sound after 5 sec. Sound Tone sounds after 5 sec. • The flow meter alarm cannot be muted. • The high temperature warning tone when setting the unit to 125°F / 55°C (131°F) or higher will not emit a sound when muted.
How to Use Setting and Using the Water Heater 2 1 (Starting with the Power Off) 1 Press the Power On/Off Button. On The temperature will be displayed on the operation panel thermostat. On Previous set temperature (Ex.: 110°F) 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.
Set temperature. 2( Always check the temperature setting before use. ) 3 4 Turn on hot water. Turn off the hot water. Hot Cold On Check the indicator lights. Off 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. 100 Washing dishes, etc. 105 110 115 ) The maximum output temperature can be set using the operation panel. ( p.
How to Use Flow Meter Alarm 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.
Water Temperature temperatures settings below are only examples. The °F : The temperature setting necessary will depend on the usage, An alarm will sound for ten seconds when the flow reaches the set level. ( the length of piping and the time of year. 100 (°C (°F) : Warm 105 110 Warmer 115 ) 120 Hot 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.
How to Use Adjusting the Maximum Output Temperature 3 1 2 1 Turn off the power. Off 2 Press and hold the flow meter alarm set button until a sound is heard (2 sec.). 3 Tone sounds after 2 sec. Change the temperature using the setting buttons. Up Down The upper limit of the hot-water supply temperature can be changed to (For Fahrenheit (°F)) 100°F, 105°F, 110°F, 115°F, 120°F, 125°F, 130°F, 135°F or 140°F.
Preventing Damage from Freezing-1 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. Freezing is prevented within the device automatically by the freeze-prevention heater Freezing cannot be prevented when the power plug is unplugged. Do not remove the power plug from the wall outlet.
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 High Temperature To avoid burns, wait until the equipment cools down before draining the water. The appliance will remain hot after it is turned off. Drain water into a bucket to prevent water damage. 1. Close the gas valve. 2. Turn off ther power button. 3. Turn off the power supply. Do not touch with wet hands. 4. Close the water supply valve. 5.
Regular Maintenance-1 Periodic Inspection CAUTION Be sure to do. To prevent burns or scalding, turn off the power button and wait until the equipment cools before performing maintenance. Check For laundry, newspaper, timber, oil, spray cans and other combustible materials. Check For abnormal sounds during operation. Check For abnormalities in external appearance, discoloration or flaws. Check Check For dust and soot in the flue terminal. For proper operation of pressure relief valve.
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 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.
Troubleshooting-1 Initial Operation Unit does not attempt to ignite when water is running. • Check for reversed plumbing or crossed pipes. • Check the water drain valve filter. ( p.20 ) Unit attempts to ignite but fails • Reset unit and try again. There may be air in the gas line. • Have a professional check the gas supply pressure. Temperature Hot water is not available when a fixture is opened.
Troubleshooting-2 (Continued) The water is cold when only a single fixture is open. • The unit will not heat the water if the flow rate is less than Fluctuations in hot water temperatures. • Set water temperature at 115°F to 120°F or 48°C (118°F) to 50°C (122°F). This will allow you to use a higher flow of hot water thus meeting the minimum flow requirement of 0.5 GPM (2L/min.). • Clean the water filter of any debris ( p.20) Setting temperature cannot rise.
Operation Panel The light on the power button does not come on. • Has there been a power failure? The water temperature changes after a power failure or when the power is disconnected. • The temperature setting and the flow meter alarm setting may both need to be reset after a power outage. • Is the power connected properly? The plastic on the surface or buttons • The surface of the operation panel is affixed with a protective sheet (to prevent surface scratching, etc.
Troubleshooting-3 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.
Check for an Error Code on the Operation Panel åÃè·ï\é¶ÇÇ®í≤Ç◊Ç≠ÇæÇ≥Ç¢ åÃè·ï\é¶ÇÇ®í≤Ç◊Ç≠ÇæÇ≥Ç¢ If there is a problem with the unit, a numerical error code will flash on the operation panel. If this occurs, take appropriate measures as listed below. Flashing When an error code appears, the display and the operation light will flash together. Error Code * When the " Cause Action Ignition error Check whether the gas valve is open.
Follow-up Service Requesting Service First follow the instructions in the troubleshooting section ( p.21 to p.25). 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.
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.
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.