Noritz N-0841MC Owner's Manual
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Noritz N-0841MC Owner's Manual

Noritz N-0841MC Owner's Manual

Condensing tankless gas water heater
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CONDENSING 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
R
Low NOx
Approved by
SCAQMD
SAR8736-1
Rev. 03/08
Model N-0841MC
N-0841MC-DV
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 Condensing 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.
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
*SAR8736 T*

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Summary of Contents for Noritz N-0841MC

  • Page 1 Installation must conform with local codes, or in the absence of local codes, SCAQMD 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 SAR8736-1 Rev.

  • 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 (Do not en- timber, boxes with flammable materials etc.). Be sure Prohibited close using corrugated sheets, etc.) to do. [When installing outdoors (N-0841MC only)] Exhaust vent Upper: Min. 36" terminal Left side: Right side: Min. 6"...
  • Page 5 (Continued) Consult the nearest Noritz agent if If this unit will be installed in a beauty the water heater location needs to salon or other location where hair be changed. spray or aerosols will be used, locate Be sure Prohibited to do.
  • Page 6 If it is snowing, check the air inlet, exhaust up to 4500 ft. above sea level. gas vent and exhaust vent terminal for For installations at higher elevations, contact Noritz blockage. America for Instructions. Do not use parts other than those specified...

  • Page 7: Table Of Contents

    Contents Important Safety Information ............... 2 Contents ......................7 Overview of Condensing Tankless Gas Water Heater ....... 8 General Parts Main Unit ....................9 Remote Controller ................... 10 Initial Operation ................... 11 How to Use Setting and Using the Water Heater ............12 Flow Meter Alarm ..................

  • Page 8: Overview Of Condensing Tankless Gas Water Heater

    Overview of Condensing Tankless Gas Water Heater This water heater is a high efficiency, 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. Condensing Conventional Tankless Gas...

  • Page 9: General Parts

    Pressure Relief Valve Water Supply Valve Drain Pipe Discharges the condensate. (Ex. N-0841MC) Gas Supply Valve * The above illustration shows an example of installation. The exact installation configuration may be slightly different. N-0841MC-DV Indoor Wall Mounted, Power Vent/Sealed Model...

  • Page 10: Remote Controller

    General Parts-2 Remote Controller (RC-7649M) What is actually displayed depends on how the water heater is set. Burner On Indicator Setting Buttons When burning, the For setting the hot indicator is lit. water temperature, p.13 and 15) the flow meter alarm, and other settings.

  • Page 11: Initial Operation

    Follow steps 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. (Ex. N-0841MC)

  • Page 12: How To Use

    How to Use Setting and Using the Water Heater (Starting with the Power Off) Press the Power On/Off Button. The temperature will be displayed on the remote control thermostat. Previous set temperature (Ex.: 110°F) DANGER To prevent scalding: High Temperature Hot Water Heater temperatures over 125°F can cause severe burns instantly or death from scalding.
  • Page 13 The temperature settings below are examples. The temperature setting °F : necessary depends on the usage, the length of piping and the time of year. The maximum output temperature Contact the installer or Noritz America can be set using the remote when setting the maximum output tem- controller.

  • Page 14: Flow Meter Alarm

    How to Use Flow Meter Alarm (Starting with the power off) Set temperature. Press the Power Preparation Always check On/Off Button temperature setting before use. 1. Plug the bath drain. Cold The temperature will be displayed on the remote control thermostat. Check the indicator lights.
  • Page 15 Water Temperature An alarm will sound for ten seconds when the flow The temperatures settings below are only examples. The °F : temperature setting necessary will depend on the usage, reaches the set level. the length of piping and the time of year. Warm Warmer The water will continue to run unless it is...

  • Page 16: Muting The Remote Controller

    How to Use Muting the Remote Controller The remote controller 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 Sound No sound...

  • Page 17: Adjusting The Maximum Output Temperature

    How to Use Adjusting the Maximum Output Temperature Change the Press and hold the flow Turn off the temperature using meter alarm set button until power. the setting buttons. a sound is heard (2 sec.). Tone sounds after 2 sec. Down The upper limit of the hot- water supply temperature can...

  • Page 18: Preventing Damage From Freezing

    * 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*.
  • Page 19 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.

  • Page 20: Turning The Unit Back On

    Preventing Damage from Freezing 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.11 “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.

  • Page 21: Regular Maintenance

    For water leaks from the Check equipment and piping. (Ex. N-0841MC) Periodic Maintenance Equipment Wipe the outside surface with a wet cloth, then dry the surface. Use a neutral detergent to clean any stains.

  • Page 22: Isolation Valves

    * The kit includes two full port isolation valves and a pressure relief valve for the hot side. Hot Water Service Valve Contact Noritz for more information. Cold Water Pressure Relief Valve Service Valve Drain Water Intlet Water Outlet (Ex.

  • Page 23: Troubleshooting

    Troubleshooting-1 Initial Operation • Check for reversed plumbing or crossed pipes. Unit does not attempt to ignite • Check the water drain valve filter. ( p.22) when water is running. Unit attempts to ignite but fails • Reset unit and try again. There may be air in the gas line. •...

  • Page 24: Amount Of Hot Water

    Troubleshooting-2 (Continued) The water is not hot enough. • Are the gas and water supply valves fully open? • 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.

  • Page 25: Remote Controller

    Remote Controller • Has there been a power failure? The light on the power button does not come on. • Is the power connected properly? The water temperature changes • The temperature setting and the flow meter alarm setting after a power failure or when the may both need to be reset after a power outage.

  • Page 26: Error Code Cause

    If the flashing number doesn't return the problem is solved. Clogging of neutralizer Contact the installer or Noritz America Technical Support for assistance. Abnormal combustion, Have a professional check the gas supply pressure.

  • Page 27: Follow-Up Service

    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 within ten (10) years of the date of original installation. 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.

  • Page 28: Specifications

    • Specifications may be changed without prior notice. Specifications • The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. Specifications Item Specification Model Name N-0841MC N-0841MC-DV Indoor, Wall Mounted Type Installation Indoor/ Outdoor, Wall Mounted Air Supply/Exhaust Power Vented...

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N-0841mc-dv

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