Noritz EcoTOUGH NRC661A-DV Owner'S Manual Download

Page: 7 / 36

Important Safety Information ....................................................................... 2

Contents......................................................................................................... 7

Overview of Condensing Tankless Gas Water Heater .............................. 8

Unit Components .......................................................................................... 9

Display Window ............................................................................................ 10

Initial Operation ............................................................................................ 11

How to Use (Not using the remote controller)

Using the Water Heater ............................................................................. 12

How to Use (Using the optional remote controller)

Remote Controller ..................................................................................... 13

Setting and Using the Water Heater ........................................................ 14

Flow Meter Alarm ...................................................................................... 16

Muting the Remote Controller .................................................................. 18

Adjusting the Maximum Output Temperature ........................................ 18

Preventing Damage from Freezing ............................................................. 19

Regular Maintenance ................................................................................... 22

Troubleshooting ........................................................................................... 25

Follow-up Service ........................................................................................ 31

Specifications ............................................................................................... 33

Contents

Summary of Contents for EcoTOUGH NRC661A-DV

Page 1: ...th WARNING Thank you for purchasing this Noritz Tankless Gas Water Heater Before using please Read this manual completely for operation instructions See the warranty registration card included separately and then visit the Noritz website www noritz com warranty to register your product Keep this manual and the warranty registration card where it can be found whenever necessary Installation must co...

Page 2: ...rdous situation which if not avoided may result in property damage CAUTION Be sure to do Ground Electric Shock DANGER Icons warning of risk level Important Safety Information 1 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 Vapors from flammable liquids will explode and ...

Page 3: ...air 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 Continued Prohibited Check the temperature of the running hot water before entering the shower Check the temperature before ...

Page 4: ...NRC661A DV Do not place outdoors Rain may enter the unit or the burner fire may be blown by the wind causing malfunction or fire as a result Prohibited Outdoor Leave the proper clearance between the water heater and nearby objects trees timber boxes with flammable materials etc Be sure to do Indicates suggested clearances for maintenance Do not place combustibles such as laundry newspapers oils et...

Page 5: ...lation 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 Be sure to electrically ground the unit Keep power cord free of dust Ground Be sure to do Do not use the water heater for other than hot water supply shower and bath Prohibited Prohibited Do not cover the water heater and the exha...

Page 6: ...mage 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 Page 20 Do not use parts other than those specified for this unit If i...

Page 7: ...the remote controller Using the Water Heater 12 How to Use Using the optional remote controller Remote Controller 13 Setting and Using the Water Heater 14 Flow Meter Alarm 16 Muting the Remote Controller 18 Adjusting the Maximum Output Temperature 18 Preventing Damage from Freezing 19 Regular Maintenance 22 Troubleshooting 25 Follow up Service 31 Specifications 33 Contents ...

Page 8: ...kless 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 The condensing tankless gas water heater tends to show white steam After the exhaust gas passes through the secondary heat exchanger the low temperature and high moisture content tends to produce steam at the v...

Page 9: ... Water Supply Valve Unit Components Intake Pipe Flue Collar Drain Pipe Discharges the condensate NRC711 OD NRC661A OD Outdoor Wall Mounted Power Vented Model Exhaust Vent Pressure Relief Valve Water Drain Valve with Water Filter Inside Water Inlet Page 23 Displayed during power ON or combustion Page 10 Two or three digit number is displayed when a failure occurs Page 25 Display Window Gas Supply V...

Page 10: ...s on set temperature s is displayed for one minute When hot water flows If there is a problem with the unit a numerical error code will flash page 25 When unit is initially plugged into power set temperature s is displayed for approx three minutes When the gas burner is off and cold water flows After one minute passed from turn on hot water the outside edge of the three digit display will rotate i...

Page 11: ...en close the fixture again 3 Open the gas supply valve Hot water fixture 2 Plug into power CLOSED 4 OPEN Do not touch with wet hands Ex NRC711 DV 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...

Page 12: ...tly 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 Ex NRC711 DV Display Window Display Window Set temperature is displayed When unit is initially plugged into power Hot water Indicates the burner is on The outside edge of the 3 digit di...

Page 13: ...e display will flash after hitting the flow meter alarm set button page 16 Error Code When this indicator is lit the hot water temperature can be set page 14 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 A number will flash if a failure occurs page 25 Priority Indicator ...

Page 14: ... F The temperature settings below are examples The temperature setting necessary depends on the usage the length of piping and the time of year Initial factory setting is 46 C 115 F Shower hot water supply etc High temperature 46 47 48 50 55 60 115 117 118 122 131 140 The maximum output temperature can be set using the remote controller page 18 When using F mode When using C mode Check the indicat...

Page 15: ... Feel water temperature before bathing or showering 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 Take caution when using the unit again after setting to 125 F 52 C or higher Always check the set temperature before use Do not allow ...

Page 16: ...ing 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 gallon 40 240L In 5 gallon 20L intervals 70 gallon 260L 80 gallon 300L 90 gallon 340L 100 gallon 380L 990 gallon Note The alarm will not sound if it is set for 990 gallon Flow meter setting will be flashing ex 45 gallon The level can only be adjus...

Page 17: ... 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 Check the temperature before stepping into the bath tub High Temperature ...

Page 18: ... 131 F or higher will not emit a sound when muted Hold the Power On Off Button for five seconds Sound Muted No sound after 5 sec Tone sounds after 5 sec Turn off the Power On Off Button Press and hold the flow meter alarm set button until a sound is heard 2 sec Change the temperature using the setting buttons Set the Power button to ON when continuing to use the unit as is Otherwise let the unit s...

Page 19: ... water through the unit when it is OFF page 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 Preventing Damage from Freezing 1 Freezing is prevented within the device automatically by th...

Page 20: ...the power supply after 2 minutes or more pass from operation of 2 Using the remote controller Turn off the power supply 4 Close the water supply valve 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 w...

Page 21: ...rge from the drain pipe within 15 minutes of use However depending on the season and or installation site conditions it may take longer If water does not appear at the end of the drain line a qualified service technician must clean the condensate line After the water heater has been out of use for a long time make sure that you fill the condensate trap with water This is to prevent dangerous exhau...

Page 22: ... button or power supply and wait until the unit cools before performing maintenance CAUTION Be sure to do Check For laundry newspaper timber oil spray cans and other combustible materials near the heater or the exhaust vent terminal For abnormal sounds during operation For abnormalities in external appearance discoloration or flaws For water leaks from the unit and piping For dust and soot in the ...

Page 23: ...he inlet and outlet drain plugs about 0 2 gallon 0 9L 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 su...

Page 24: ...Exchanger needs to be flushed to prevent damage from Scale Build up Please contact Noritz America for more information about flushing the Heat Exchanger http support noritz com or 866 766 7489 1 2 3 4 F 1 2 3 4 5 6 7 8 9 A b C d E F 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 05 mg L or l...

Page 25: ...ustion low gas supply pressure Have a professional check the gas supply pressure Contact the nearest Noritz agent Abnormal combustion Contact the nearest Noritz agent The unit detects Scale Build up in the Heat Exchanger Warning indication and then the unit will shut off before long When the error code is flashing in the Display Window a warning indication will appear in the Display Window And the...

Page 26: ...n the Display Window Is the hot water fixture sufficiently open Is the gas being cut off by the gas meter Can other gas device such as stoves be used For LP Is there enough gas in the tank Can other gas devices such a stoves by used Is the water drain valve filter clogged page 23 Is the power button optional remote controller turned on Check for the error code in the Display Window Is the error co...

Page 27: ...ssible for the outlet temperature to be lower than the temperature set on the remote controller Decrease the amount of hot water passing through the unit and the temperature should stabilize The actual outlet water temperature is lower than the set temperature of the unit Contact the nearest Noritz agent The water is cold when only a single fixture is open The unit will not heat the water if the f...

Page 28: ...r in the tub is less more than the set amount when using the flow meter alarm feature 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 Using the optional remote controller The flow meter alarm does not sound even when filled to the set amount The fl...

Page 29: ...000ft above sea level or for longer vent runs Please contact your installer or Noritz to verify the unit dip switches are set correctly for your installation Optional Remote Controller Problems What to do Display Window The light on the power button does not come on Has there been a power failure Is the power connected properly The water temperature changes after a power failure or when the power ...

Page 30: ...ormal The white smoke is actually steam 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 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 concern...

Page 31: ...upport noritz com 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 We will need to know The Model check the rating plate See page 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 numb...

Page 32: ...urer 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 ...

Page 33: ...cations Performance Item Model Name Type Ignition Operating Pressure Minimum Flow Rate Dimensions Height x Width x Depth Weight Water Holding Capacity Accessories Installation Air Supply Exhaust Connection Sizes Power Supply Materials Water Inlet Hot Water Outlet Gas Inlet Condensate Drain Safety Devices Item Gas Consumption Maximum Hot Water Capacity Capacity Range Temperature Settings Using the ...

Page 34: ...nce Item Model Name Type Ignition Operating Pressure Minimum Flow Rate Dimensions Height x Width x Depth Weight Water Holding Capacity Accessories Installation Air Supply Exhaust Connection Sizes Power Supply Materials Water Inlet Hot Water Outlet Gas Inlet Condensate Drain Safety Devices Item Gas Consumption Maximum Hot Water Capacity Capacity Range Temperature Settings Using the optional remote ...

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