CONDENSING TANKLESS GAS WATER HEATER Owner's Guide Models NRCP1112-DV / NRCP982-DV (Eco TOUGH) • Natural Gas(NG) / Liquid Propane Gas (LP) c Thank you for purchasing this Noritz Tankless Gas Water Heater. Before using, please: Read this guide completely for operation instructions. Completely fill out the warranty registration card (included separately) and mail the detachable portion to Noritz America Corporation.
Owner’s Guide – Table of Contents Chapter 1 Product Overview Operating Flow chart 3 Chapter 2 Safety Regulations. Safety Precautions 4 Before Operation 7 When in Operation 9 Important Safety Information 11 Initial Operation 12 Control Panel Interface 13 Control Panel LCD Interface 14 Chapter 3 Unit Operation How to use Control Panel 1. Clock Adjustment 15 2. Setting Hot Water Temperature 17 3. Locking the Control Panel 19 4. How to check the ‘Error History’ 19 5.
Chapter 1. – Product Overview Operating Flow Chart Operating Flow Chart This water heater is a highly efficient, fully condensing appliance. Unlike a traditional tankless water heater, a condensing type captures heat from the exhaust gas and uses it to preheat the incoming cold water as it passes through the secondary heat exchanger as illustrated below. Standard mode The condensing tankless gas water heater discharges condensate.
Chapter 2. – Safety Regulations Safety Precautions Safety Precautions To avoid product damage, personal injury, or even possible death, carefully read, understand, and follow all the instructions in the Installation and Owner’s Guide and on the Water Heater before installation, operation, or service. Noritz cannot anticipate every circumstance that might involve a potential hazard and our warnings are, therefore, not all-inclusive. Proper installation, operation, and service are your responsibility.
Chapter 2. – Safety Regulations Safety Precautions Safety Precautions WARNING OPERATING INSTRUCTIONS 1. STOP! Read the safety information above on this label. 2. Set the thermostat to lowest setting. (Do not use Water Heater unless it is completely filled with water.) 3. Turn OFF electrical power supply to the Water Heater. 4. This Water Heater is equipped with an ignition device which automatically lights the main burner. Do not try to light the burner by hand. 5.
Chapter 2. – Safety Regulations Safety Precautions Safety Precautions WARNING Proper care is your responsibility. Carefully read and understand the Operating Information in this guide before operating the Noritz Water Heater. Be fully aware of where the gas shut-off valve is located and how to operate it. Close the gas shut-off valve immediately if the appliance is subjected to fire, overheating, flood, physical damage, or any other damaging condition that might affect the operation of the unit.
Chapter 2. – Safety Regulations Before Operation Before Operation CAUTION 1. Check the gas being used. When the Water Heater is used or moved for the first time, user must check whether the type of gas being supplied matches the specific gas type for the appliance. The type of gas is indicated on the rating plate on side of the water heater. 4. Check the water supply valve. Please leave the appliance water supply valve open at all times (it must be closed during installation) 2.
Chapter 2. – Safety Regulations Before Operation Before Operation WARNING Do not store flammable material in the appliance room. CAUTION Pull out the power plug from the receptacle if lightning strikes. Do not store portable gas container, thinner, oil, or other flammable materials in the room. Otherwise, fire may break out. Lightning can damage the water heater. Pull out power cord plug if lightning strikes for your safety.
Chapter 2. – Safety Regulations When in Operation When in Operation After repair of gas pipeline or gas regulator replacement, call service agent for inspection before starting it up. Gas leakage test Gas supply line must be inspected regularly. (If air bubbles appear in soap water test, the gas is leaking out. Close the gas supply valve and call your gas supplier for inspection) Ventilation during gas leakage If exhaust gas enters room, it could cause poisoning by carbon monoxide.
Chapter 2. – Safety Regulations When in Operation When in Operation CAUTION Do not shut off the Water Heater. When you leave home for a long time, do not shut off the Water Heater. The Water Heater has a freeze protection function. The freeze protection feature will not work if electrical power, gas, or water is disconnected. Do not disassemble the Water Heater. Service must be performed by a qualified installer, service agency or gas supplier. Otherwise, Warranty will be voided.
Chapter 2. – Safety Regulations Imortant Safety Indormation Important Safety Information 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. Preventing damage from freezing 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.
Chapter 3. – Unit Operation Initial Operation • Before the first use of your water heater, make the following preparations. 1. Open the water pipe valve. 2. Open a hot water fixture/faucet to confirm that water is available, and then close the fixture/faucet again. 3. Open the gas supply valve. 4. Turn on the power on the front panel. Do not touch with wet hands.
Chapter 3. – Unit Operation Control Panel Interface Control Panel Interface Hot Water Temperature Setting Button Display Screen Indicator (Green) Function Button Recirculation Timer Button Power ON / OFF Button For turning the water heater on/off.
Chapter 3. – Unit Operation Control Panel LCD Interface Control Panel LCD Interface LCD has a backlight that will illuminate: • When a user action is detected (a button is pressed) • Turns off when no action within approximately 20 seconds.
Chapter 3. – Unit Operation How to use Control Panel 1. Clock Adjustment ►To use the ‘Recirculation Timer Mode’, the device’s internal clock should be adjusted to the current time. Clock settings can be set in the ‘User mode’. [ To enter ‘User Mode’ ] Power must be ‘ON’ on the Display. ‘[A:GA]’ is displayed on the display screen. From here, turn the ‘Dial Button’ to start the Press and hold ‘Function Button’ for approxi- setting. mately 5 Seconds to enter ‘User mode’.
Chapter 3. – Unit Operation How to use Control Panel- User mode 3. Setting day : 25 Set the ‘day’ by turning the dial button. (Only the flashing number can be changed.) Press the dial button to store the setting. 4. Setting day of the week: Friday Set the ‘day of the week’ by turning the dial button. (Only the flashing number can be changed.) Press the dial button to store the setting. 5. Setting hour : 10 Set the ‘hour’ by turning the dial button. (Only the flashing number can be changed.
Chapter 3. – Unit Operation How to use Control Panel- User mode 2. Setting Hot Water Temperature The operation of the high temperature hot water can be set separately. General temperature range °F 100 105 110 115 High temperature range 120 125 130 135 140 51.5 54.5 57 60 Default ℃ 38 40.5 43.5 46 49 The temperature settings below are examples. The temperature setting necessary depends on the usage, the length of piping and the time of year.
Chapter 3. – Unit Operation How to use Control Panel- User mode ‘User Mode’ confirmation function Function can be checked and set in ‘User mode’.
Chapter 3. – Unit Operation How to use Control Panel- User mode 3. Locking the Control Panel. [C:TL] By locking the control panel, the settings cannot be accidentally changed if a button is pressed by mistake. - Refer to page 18 ‘User Mode’ setting method and set to ‘User mode’. - Function can be checked by turning the dial button. Temperature Lock mode 1. Select the ‘[C:TL] mode’ by turning the ‘Dial Button’ in ‘User Mode’. 2.
Chapter 3. – Unit Operation How to use Control Panel- User mode 5. How to check the ‘Running History’. [J:RH] - Refer to page 18 ‘User mode’ setting method and set to ‘User mode’. - Function can be checked by turning the dial button. Screen Display Operation PLUG Power-on Time Description EX) 102.8 → 102.8 X 1000 = 102,800 hour bnHR Burn Hour EX) 31.07→ 31.07 X 1000 = 31,070 hour bnCY Burn Cycle EX) 4307→ 4307 X 1000 = 4,307,000 times PPHr Pump Running Time EX) 347.1→ 347.
Chapter 3. – Unit Operation How to use Control Panel - User mode 6. Setting the ‘Unit’. [K:FC] - Refer to page 18 ‘User mode’ setting method and set to ‘User mode’. - Function can be checked by turning the dial button. Unit Setting mode 1. Select the ‘[K:FC]’ by turning the ‘Dial Button’ in ‘User mode’. 2. If ‘Dial Button’ is pressed in ‘[K:FC]’, ‘GAL’ character is flashing. (If flashing character is ‘GAL’, units displayed on the display screen are GPM and Fahrenheit.) 3.
Chapter 3. – Unit Operation How to use Control Panel-Installer mode 7. Programming to use the Recirculation System Note : [1:RC] mode function must be ‘on’ in ‘Installer Mode’ in order to use the ‘Recirculation Timer’. ( ‘Recirculation Timer’ function is only enabled in ‘Recirculation Mode’.) To enter ‘Installer Mode’ press the ‘Power Button’ on the display the screen will be blank. Press the Function button for approximately 5 Seconds. 1. Turn the ‘Dial Button’ to ‘[1:RC]. 2.
Chapter 3. – Unit Operation How to use Control Panel - User mode 7. Programming to use the Recirculation System ► Table for ‘Recirculation Timer’ setting. ‘Recirculation Timer’ function has three settings ([Act], [SEt], [cLr]). ‘[Act] mode’ is to set the ‘Recirculation Timer’, ‘[Set] mode’ is to manually set the day and times of a pattern appropriate to the consumer and ‘[cLr]’ mode is to initialize the setting. STEP 1. To set the ‘Recirculation Timer’ Type Customized reservation function setting.
Chapter 3. – Unit Operation How to use Control Panel - User mode 7. Setting the ‘Recirculation Timer’. (Recirculation _Auto (Self Learning Mode)) 7-1 Set the ‘Recirculation Timer’ in ‘Auto’ mode. - Users can select between ‘Programming mode’ or ‘Auto’ mode Select the (Auto or Prog) in ‘Recirculation Timer’ mode. 1. Press the ‘Recirculation Timer Button’ when power of the display screen is turned on. 2. ‘Recirculation Timer Icon’ and [Act] character are flashing on display screen.
Chapter 3. – Unit Operation How to use Control Panel - User mode 7. Setting the ‘Recirculation Timer’. (Recirculation_Program Mode) 7-2 Set the ‘Recirculation Timer’ in ‘Prog’ mode. - Customer can directly set the day and time in ‘Recirculation Mode’. 1. Press the ‘Recirculation Timer Button’ while power of the display screen is turned on. 3-1 Set the day in ‘[Prog] mode’ by turning the ‘Dial Button’. 3-3 Turn the ‘Dial Button’ until next desired day appears on display screen.
Chapter 3. – Unit Operation How to use Control Panel - User mode 4-1 Time is stated from 12:00. Turn the ‘Dial Button’ clockwise, time on the display screen is changed in increments of 30 minutes. Setting from 6 am to 8:30 am 4-3 Turn the ‘Dial Button’ to ending time. Thenpress the ‘Dial Button’ after locating the dial button by desired time. 4-2 Press the ‘Dial Button’ after locating the desired start time. 4-4 Press the ‘Dial Button’ for approximately 2 Seconds to store. 5.
Chapter 3. – Unit Operation How to use Control Panel - User mode 7. Setting the ‘Recirculation Timer’. (Recirculation Initialization) 7-3 Recirculation function initialization setting - Reserved contents can be initialized. 1. Press the ‘Recirculation Timer Button’ when display screen is turned on. 2. [Act] character is flashing on display screen. Turn the ‘Dial Button’ clockwise to select the [cLr] character. 3. Press the ‘Dial Button’ when [cLr] is flashing character on display screen.
Chapter 3. – Unit Operation How to use Control Panel - User mode 8. Setting the ‘Recirculation System’. Inst.
Chapter 3. – Unit Operation How to use Control Panel - User mode 2. External Recirculation mode The recirculation pipe must be installed in the field in order to apply the ‘External Recirculation Mode’. This mode allows the water heater recirculation pipes to be warmed up and serving as the freeze protection function.
Chapter 3. – Unit Operation How to use Control Panel - Installer mode 8. Setting the ‘Recirculation System’. 8-1. To set the recirculation type (External or Internal mode) 1. Turn off the power to the control panel. Press and hold the ‘Function Button’ for approximately 5 seconds to get into the ‘Installer mode’. 2. Turn the dial button in ‘Installer mode’ to ‘[1:RC]’. 3. ‘oFF’ character is flashed when the dial button is pressed. (Default setting is ‘oFF’ and recirculation function is turned off.) 4.
Chapter 3. – Unit Operation Preventing Damage form Freezing 9. Preventing Damage from Freezing-1 CAUTION • Damage can occur from freezing 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. 1. Two modes for freeze protection. 1-1. Recirculation Pump mode. • When water temperature falls between 42°F(5.
Chapter 3. – Unit Operation Preventing Damage form Freezing 3. If the water heater will not be used for a long period of time, drain the water. CAUTION • To avoid burns, wait until the equipment cools down before draining the water. • The appliance will remain hot for short period after it is turned off. Drain water into a bucket to prevent water damage. 1. Close the gas valve. 2. (1) Turn the power on/off button “On”.
10. Preventing Damage from Freezing-2 1. Turning the Unit Back On 1. Check that all drain plugs are inserted. 2. Check that all hot water fixtures/faucets are closed. 3. Follow the procedure on page 12 “Initial operation”, steps 1 through 4. 4. Make sure that the area around the appliance is well ventilated; open a window or a door if necessary. Then, operate the unit and verify that condensate is coming out of the drain pipe.
Chapter 4. – Maintenance Maintaining the Water Heater 1. General Maintenance Regular Maintenance - After Water Heater installation is completed, the installation manual should be placed in near the water heater. Maintenance instructions should be carried out by the guidelines Maintenance detail lists, please refer to the instructions below. Maintenance procedures [Monthly] - Check vent pipe. Visually inspect the flue gas vent piping for any signs of blockage, leakage or deterioration of the piping.
Chapter 4. – Maintenance Maintaining the Water Heater 2. Cleaning the Water Heater 1. Cleaning Air Intake Filter To properly maintain the water heater, you should check air intake filter every month. If not, you will encounter a problem with combustion specifications. To clean air intake filter: 1. Press the Power button on the control panel to turn off the water heater. 2. Disconnect the power supply from the water heater. 3. If the water heater has been operating, wait for it to cool before continuing.
Chapter 4. – Maintenance Maintaining the Water Heater - Cleaning Cold Water Inlet Filter / Recirculation Water Filter 1. Place a bucket under the appliance to collect the residual water inside the water heater. 2. Press ‘Power button’ to turn off the electrical power to the water heater. And then turn off the gas valve. 3. Close water supply valve on the inlet to the appliance. 4. Open the hot water faucets completely. Use a coin. Recirculation Water Filter Cold Water Filter 5.
Chapter 4. – Maintenance Maintaining the Water Heater 3. Flushing the Water Heater - Flushing the Water Heater Flushing the Heat Exchanger of water heater is a complicated procedure. Initialization is required to do a proper flush. Refer to the following instructions carefully before attempting the procedure. If you do not understand the procedure, contact an authorized technician or licensed professional. Keep in mind that improper maintenance will void your warranty. Regular Cleaning 1.
Chapter 4. – Maintenance 3. Flushing the Water Heater 5. Press the dial button and confirm the Pump activation by sounds and also icon. 6. Wait for 30 seconds and disconnect the power to the water heater. 7. Follow from 3 to 12 in regular cleaning above to finish the cleaning. Maintenance procedures [Annually] - Check piping. (gas and water) Visually inspect for leaks around internal water piping. Also inspect external water piping, circulators, pressure relief valve and fittings.
Chapter 5. – Troubleshooting Checking for Error Conditions 4. Checking for Error Conditions When the water heater encounters an error, the display will flash “Er” followed by a numerical code. The water heater shall enter a soft lockout condition if the error is such that it can return to normal operation once the condition relieves itself (overheat conditions, temperature sensor open or shorts, etc.).
Chapter 5. – Troubleshooting Troubleshooting Troubleshooting Problem Possible Remedies Burner Does Not Ignite • Make sure that the ON/OFF button on the Control Panel is ON. • If the display on the Control Panel is blank, make sure the power cord is plugged in and 3A fuses on the main controller in the water heater are good. Power switch inside water heater is on. • Make sure that the water heater is supplied with water. The unit activates when inlet water flow sensor detects flow over 0.
Chapter 6. – Follow-up Service Follow-up Service- Follow-up Service Requesting Service First follow the instructions in the troubleshooting section ( p.38 to p.39). 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) Date of purchase ......(see the warranty) Details of problem ....(flashing error codes, etc.
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Owner's Guide NORITZ AMERICA CO.
