Noritz NC1991-OD Owner's Manual
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Noritz NC1991-OD Owner's Manual

Noritz NC1991-OD Owner's Manual

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TANKLESS GAS WATER HEATER
Owner's Guide
WARNING
- Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor's phone. Follow the
gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire department.
- Installation and service must be performed by a qualified installer, service
agency or the gas supplier.
CERTIFIED
Low NOx Approved
by SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)
SBA8883-1
Rev. 03/13
Models : NC1991-OD
FOR USE IN COMMERCIAL APPLICATIONS.
If the information in this manual is not followed exactly, a fire or explosion
may result causing property damage, personal injury, or death.
Thank you for purchasing this Noritz Tankless Gas Water Heater.
Before using, please:
Read this manual completely for operation instructions.
R
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.
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
NC1991-DVC
*SBA8883*

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Summary of Contents for Noritz NC1991-OD

  • Page 1 Installation must conform with local codes, or in the absence of local codes, the National Fuel Gas Code, ANSI Z223.1/NFPA 54. Noritz America reserves the right to discontinue, or change at any time, the designs and/or specifications of its products without notice.

  • Page 2: Important Safety Information

    Important Safety Information-1 To prevent damage to property and injury to the user, the icons shown below will be used to warn of varying levels of danger. Every indication is critical to the safe operation of the water heater and must be understood and observed. Potential dangers from accidents during installation and use are divided into the following four categories.
  • Page 3 WHAT TO DO IF YOU SMELL GAS. 3. Turn off gas and water supply valve. • Do not try to light any 4. Call the nearest Noritz agent. appliance. • Do not touch any electrical switch; do not use any phone Explosion Hazard ;...
  • Page 4 Be sure Outdoor to do. malfunction or fire as a result. Ex. For Natural Gas (NC1991-OD) Leave the proper clearance between the water heater and nearby objects (trees, timber, boxes with flammable Be sure materials etc.).
  • Page 5 (gas, oil) hand. Shock. or components of the product itself. Consult the nearest Noritz agent if the water heater location needs to The gas conversion kit shall be installed by a be changed. qualified service agency in accordance with Be sure to do.
  • Page 6 Do not up to 4500 ft. (1350m) above sea level. drink the first use of hot water from the For installations at higher elevations, contact Noritz unit in the morning. America for Instructions.

  • Page 7: Table Of Contents

    Contents Important Safety Information ............... 2 Contents......................7 RC-9018M Operation Overview ..............8 Initial Operation .................... 10 General Parts Main Unit ....................11 Remote Controller ..................12 System Check....................14 For All Systems Clock Adjustment ..................16 Using the Water Heater ................17 Setting Hot Water Temperature..............

  • Page 8: Basic Operation

    RC-9018M Operation Overview Basic operation It is possible to It is possible to lock [ For recirculation systems ( automatically turn It is possible to circulate hot water only remote controller operation. during preferred times of day. the water heater “ON”...
  • Page 9 User Preferences The remote controller can be customized based on the preference of the user in the following ways: The set temperature can be The clock display can be The remote controller restricted to a maximum level shown even though the power display can be turned to prevent high temperature ON/OFF button is set to "OFF".

  • Page 10: Initial Operation

    Open the water supply valve. OPEN CLOSED Open a hot water fixture to confirm that water is available, and then close the fixture again. Hot water fixture Open the gas supply valve. Turn on the power. Do not touch with wet hands. (Ex. NC1991-OD)

  • Page 11: General Parts

    General Parts -1 Main Unit NC1991-OD (Outdoor Wall Mounted, Power Vented Model) Exhaust Vent Front Cover Air Inlet Water Drain Valve (with Water Filter) (Inside Water Inlet) Pressure Relief Valve p.36) Water Supply Valve Gas Supply Valve NC1991-DVC (Indoor Wall Mounted, Power Vent/Sealed Model)

  • Page 12: Remote Controller

    General Parts -2 Remote Controller (RC-9018M) The remote controller will emit a tone when a button is pressed. Alarm Off Button Prog Button / Indicator (Red) / Indicator (Red) Activates the automatic water heater power Stops the tone that is emitted “ON”...
  • Page 13 Screen Display * The screen display shown below is for illustration purposes only. The actual display will vary depending on how the water heater is being used. * After a button is pressed, the display will gradually become darker to prevent unnecessary power consumption by the remote controller.

  • Page 14: System Check

    System Check If you press the button, you can check the status of the system (Display Screen Example [System [Rcrc] ]) Cover shown in the open position. System Displayed on System Description the Remote Controller Water heater only operation. * Water heater and recirculation operation. * During recirculation operation, hot water is always circulated in the piping to provide instant hot water when a fixture is opened.
  • Page 15 Depending on the configuration of your system, not all functions may be used. General System Diagram Applicable Remote * The number of water heaters, fixtures, and Controller Functions pumps will vary depending on the configuration of the hot water system. ater heater hen you start using the system, cold Functions other than...

  • Page 16: For All Systems

    Clock Adjustment For All S stems Cover shown in the open position. Screen Display Operation Description * This adjustment can be made button Press the regardless of whether the inside the cover. button is ON/OFF. button. Press the * The time changes in 1-minute increments with each press 1) Use the buttons to...

  • Page 17: Using The Water Heater

    Using the Water Heater For All S stems is displayed, hot water will be discharged at the temperature of the storage tank. Screen Display Operation Description For systems with recirculation operation, * The indicator is lit. button is "ON". is displayed here. * The previously set hot water supply temperature is shown.

  • Page 18: Setting Hot Water Temperature

    Setting Hot Water Temperature For All S stems * If is displayed, hot water will be discharged at the temperature of the storage tank. Cover shown in the open position. Screen Display Operation Description * The indicator is lit. button is "ON". * The previously set hot water supply temperature is shown.
  • Page 19 Temperature Setting Options 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. 105 110 115 120 125 130 135 140 145 150 160 170 185 Washing Shower, hot water supply, etc.

  • Page 20: Automatic Water Heater "On" Or "Off" Operation

    Automatic Water Heater “ON” or “OFF” For All S stems ou set the time to turn ON or OFF the utton the utton is automaticall turned ON or OFF at the set time e er ust turning the utton ON * It is also possi le to set onl “ON”...
  • Page 21 Operation Hint or operation ollwing this rocedure allows for automated control of water heater o eration without user interaction. * The setting time shown on the dis lay of the remote controller is for exam le ur oses only. 1: Both ON and OFF 2: Onl “ON”...

  • Page 22: Locking The Remote Controller

    Loc ing the Remote Controller For All S stems B loc ing the remote controller the settings cannot e accidentall changed i a utton is pressed mista e Co er shown in the open position Operation Screen Displa Description * The o eration can be locked Press and hold utton regardless if the...

  • Page 23: Customizable Settings

    Customi a le Settings Misc settings -1 For All S stems Ad usting the Ma imum Output Displa Screen Power Sa ing Mode Temperature [powersa e dspl ] The maximum out ut tem erature To conserve ower consum tion by can be limited to revent discharging the dis lay, it can be turned off hot water at too high of a tem erature.
  • Page 24 Customi a le Settings Misc settings -2 For All S stems Ad usting the rightness o the S stem dependent option Muting the remote controller displa screen when the remote Error Tone Settings The remote controller can be muted controller is turned on so that it does not emit a tone when The remote controller can be muted The dis lay screen can be brightened...
  • Page 25 Draining the Water Heater Restoring De ault Settings Refer to age 33 for details. Select settings can be restored to the factory default conditions. See items marked with a in the efault Settings section utton is OFF utton is OFF Press the utton inside Press the...

  • Page 26: Enabling Automatic Recirculation Operation

    Ena ling Automatic Recirculation Operation * To chec s stem status p 14 * When “s nchro ON/OFF” is set to “Yes” recirculation can e acti ated automaticall * To change “s nchro ON/OFF” rom “Yes” to “No” ollow the same procedure as descri ed elow Co er shown in the open position...

  • Page 27: Manually Starting Recirculation Operation

    Manuall Starting Recirculation Operation Recirculation operation can e manuall stopped or started using this procedure Co er shown in the open position Operation Screen Displa Description * ou can set this function if the 1 Press the utton button is inside the co er Select Recirc menu using the...

  • Page 28: Setting The Recirculation System Operation Timer

    Setting the Recirculation S stem * With the recirculation operation timer set hot water will e automaticall circulated in the hot water pipes E en with this unction acti ated it ma ta e se eral minutes or hot water to e completel circulated through the plum ing s stem Set the timer to acti ate the recirculation s stem prior to the irst use o hot water to ensure hot water is instantl a aila le...
  • Page 29 Operation Timer Operation Screen Displa Description * very time when you ress the 1 Select AM : using button, the time changes by one hour. To kee the current nd time uttons Here ress the button without 2 Press the utton to changing the nd time,...

  • Page 30: Single Water Heater Only

    Flow Meter Alarm Single Water Heater Onl I the low meter alarm is eing used to indicate when a tu is ull: • I an hot water is eing used esides what is going into the tu the alarm will sound e ore the tu is ull •...
  • Page 31 Operation Screen Displa Description Turn on hot water Lit during com ustion The highest I the hot water temperature has een temperature set so that it does not re uire mi ing set the mi ing al e to its highest setting The hot water in the bathtub may become lukewarm if it is mixed with cold water at the fixture.

  • Page 32: Preventing Damage From Freezing

    Pre enting Damage rom Free ing-1 CAUTION amage can occur from fro en water within the device and i es even in warm environments. Be sure to read below for a ro riate measures. * Re airs for damage caused by free ing are not covered by the warranty.
  • Page 33 I the water heater will not e used or a long period o time drain the water rain the water as follows CAUTION To avoid burns, wait until the e ui ment cools down before draining the water. The a liance will remain hot after it is turned off.
  • Page 34 Pre enting Damage rom Free ing-2 Turning the Unit Bac On 1. Check that all drain lugs are inserted. 2. Check that all hot water fixtures/faucets are closed. 3. ollow the rocedure on .1 Initial o eration , ste s 1 through .

  • Page 35: Regular Maintenance

    Regular Maintenance-1 Periodic Inspection CAUTION To revent burns or scalding, turn off the ower button and wait until the e ui ment cools before erforming maintenance. Be sure to do. or dust and soot in or laundry, news a er, Chec Chec the exhaust vent or...
  • Page 36 Regular Maintenance-2 Periodic Maintenance Water Drain Val e 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 a oid urns wait until the e uipment cools down e ore draining the water The appliance will remain hot a ter it is turned o 1.

  • Page 37: Troubleshooting

    Trou leshooting-1 Initial Operation • Check for reversed lumbing or crossed i es. nit does not attem t to ignite when water is running. • Check the water drain valve filter. ( nit attem ts to ignite but fails • Reset unit and try again. There may be air in the gas line. •...
  • Page 38 Trou leshooting-2 Continued • The unit will not heat the water if the flow rate is less than The water is cold when only a . gallons 2 er minute. single fixture is open. Open the fixture more or open other fixtures so that a greater flow passes through the unit, and the unit should begin heating again.
  • Page 39 Remote Controller The ower indicator • as there been a ower failure does not light u . • Is the ower connected ro erly The water tem erature changes • The temperature setting and the flow meter alarm setting after a ower failure or when the may both need to be reset after a ower outage.
  • Page 40 Trou leshooting-3 Other The eater sto s burning during • Are the gas and water su ly valves fully o en o eration. • Is the water su ly cut off • Is the hot water fixture/faucet sufficiently open? • Is the gas being cut off by the gas meter Can other gas devices such as stoves be used •...
  • Page 41 Chec ing or Error Conditions hen a failure occurs, information relating to the error blinks on the dis lay. The error alarm may also continuously sound. Error Code Displa Screen The dis lay may indicate the ty e of failure that has occured de ending on the system configuration.

  • Page 42: Follow-Up Service

    Follow-up Ser ice-1 Re uesting Ser ice irst follow the instructions in the troubleshooting section .3 to . 1 . If the error is not corrected, contact orit America Technical Su ort at 8 e will need to know The Model check the rating late *See .
  • Page 43 Press the utton to chec the status o the s stem Operation Screen Displa Description * Status can be checked regardless of Press the utton whether the button is inside the co er * If the button is ushed or Screen dis lay xam le it is left untouched for a roximately...
  • Page 44 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.

  • Page 45: Specifications

    Specifications-1 • Specifications may be changed without prior notice. • The ca acity may differ slightly, de ending on the water ressure, water su ly, i ing conditions, and water tem erature. Specifications Item Specification odel ame Ty e Installation utdoor ounted Air Su...
  • Page 46 Specifications-2 • Specifications may be changed without prior notice. • The ca acity may differ slightly, de ending on the water ressure, water su ly, i ing conditions, and water tem erature. Specifications Item Specification odel ame Ty e Installation Indoor ounted Air Su...

  • Page 47: Default Settings

    De ault Settings Items De ault setting Cloc displa unset 110˚F / 40˚C Hot water temperature Hot water olume Alarm o Customi a le Settings P23 - 2 De ault setting 185˚F / 85˚C Ma imum Output Temperature Powersa e dspl and cloc displa No-1 Brightness o the displa screen when...

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Nc1991-dvc

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