Table of Contents
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TANKLESS GAS WATER HEATER
Owner's Guide
FOR USE IN RESIDENTIAL OR MANUFACTURED HOME APPLICATIONS.
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)
SBA8893
Rev. 01/12
Models : NR981-OD
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.
When applicable, installation must conform with the Manufactured Home
Construction and Safety Standard, Title 24 CFR, Part 3280 or the Canadian
Standard CAN/CSA-Z240 MH Mobile Homes, Series M86.
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
NR981-DVC
NR981-SV
*SBA8893*
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Table of Contents
Related Manuals for Noritz proTOUGH NR981-OD
Summary of Contents for Noritz proTOUGH NR981-OD
- Page 1 Read this manual completely for operation instructions. CERTIFIED 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.
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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 (Continued) [NR981-SV] [NR981-OD] Do Not Install Indoors. Check whether or not the air This will cause carbon inlet filter is clogged with Be sure Prohibited to do. monoxide poisoning and dust, trash or the like. Indoor a potential fire hazard. Clogging the opening may result in incomplete combustion. Air inlet filter [NR981-DVC, NR981-SV] Do not use the water...
- Page 4 Prohibited supplied matches the or the burner fire may be gas on the rating plate. blown by the wind, causing Be sure Outdoor to do. malfunction or fire as a result. Ex. For Natural Gas (NR981-OD) Leave the proper clearance between the water heater and nearby objects (trees, timber, boxes with flammable Be sure materials etc.). to do. Upper: [NR981-OD] Min. 36" (900mm) Left side: Min.
- Page 5 Be sure to do. block the flow of fresh air to the unit. Do not use the water heater for Do not install in locations where other than hot water supply, shower excessive dust or debris will be and bath. Prohibited in the air. Prohibited Do not use a broken or modified Do not touch the exhaust vent or the power cord. Do not bind, bend or exhaust vent terminal and concentric stretch power cords. Prohibited pipe during or immediately after Do not scratch, modify, or subject Don’t operation of the water heater. touch. them to impact or force. [NR981-DVC] [NR981-OD] [NR981-SV] To prevent burns or scalding, turn off the power button and wait until the equipment cools before per- Be sure forming maintenance. to do.
- Page 6 Important Safety Information CAUTION Do not drink water that has been inside the This unit is only approved for installation unit for an extended period of time. 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. Clean the filter on the water inlet as Do not disassemble the remote controller. frequently as required by the quality of your local water. ( p.21) Do not use benzene, oil or fat detergents to clean the remote controller. Keep the area around the unit clean. This may cause deformation. If boxes, weeds, cobwebs, cockroaches etc. are in Do not get the remote controller wet. the vicinity of the unit, damage or fire can result. Although it is water resistant, too much water can cause damage.
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Page 7: Table Of Contents
Contents Important Safety Information ............... 2 Contents......................7 General Parts Main Unit ....................8 Remote Controller ..................10 Initial Operation .................... 11 How to Use Setting and Using the Water Heater ............12 Flow Meter Alarm ..................14 Muting the Remote Controller ..............16 Adjusting the Maximum Output Temperature ........ -
Page 8: General Parts
General Parts Main Unit NR981-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.21) Gas Supply Valve Water Supply Valve NR981-SV (Indoor Wall Mounted, Power Vented Model) Flue Collar Front Cover Air Inlet Filter Water Drain Valve (with Water Filter) (Inside Water Inlet) p.21) Pressure Relief Valve Gas Supply Valve Water Supply Valve... - Page 9 Main Unit NR981-DVC (Indoor Wall Mounted, Power Vent/Sealed Model) Concentric Pipe Front Cover Operation Panel In this Owner’s Guide, this panel will be referred to as Water Drain Valve the “Remote Controller”. (with Water Filter) (Inside Water Inlet) Pressure Relief Valve p.21) Water Supply Valve Gas Supply Valve * The above illustration shows an example of installation. The exact installation configuration may be slightly different.
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Page 10: Remote Controller
General Parts Remote Controller (RC-7651M) 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. Priority Indicator When this indicator is lit, the hot water temperature can be set. -
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. Do not touch with wet hands. (Ex. NR981-OD) -
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 (52°C) can cause severe burns instantly or death from scalding. • Children, disabled and elderly are at the highest risk of being scalded. - Page 13 Set temperature. Turn on hot Turn off the hot water. water. Always check the temperature setting before use. Cold Check the indicator lights. Water temperature When using °F mode: °F : The maximum output temperature can be The temperature settings below are examples. The temperature setting set using the remote controller. ( p.17) necessary depends on the usage, the length of piping and the time of year.
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Page 14: Flow Meter Alarm
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. •... - Page 15 Water Temperature An alarm will sound for ten °F : The temperatures settings below are only examples. The seconds when the flow temperature setting necessary will depend on the usage, the length of piping and the time of year. reaches the set level. Warm Warmer °C (°F) :...
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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 Press and hold the flow Change the 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 be changed to... -
Page 18: Preventing Damage From Freezing
* In normal operation, freezing is prevented within the device automatically unless the outside temperature without wind is below -4°F (-20°C) for NR981-OD or -30°F (-35°C) for NR981-DVC or NR981-SV. - For model NR981-SV, the room temperature must be greater than 32°F (0°C) to prevent freezing and the room inside must not have negative pressure. -
Page 19: Turning The Unit Back On
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: Regular Maintenance
For proper operation of Check pressure relief valve. (Ex. NR981-OD) Periodic Maintenance Equipment Wipe the outside surface with a wet cloth, then dry the surface. Use a neutral detergent to clean any stains. Remote Controller Wipe the surface with a wet cloth. -
Page 21: Periodic Maintenance
(Take care not to lose the packing.) 7. Close all hot water fixtures. 8. Open the water supply valve and check that water does not leak from the drain plugs or water Water Supply drain valve (with water filter). Valve (Ex. NR981-OD) - Page 22 * The kit includes two full port isolation valves and a pressure relief valve for the hot side. Contact Noritz for more information. Hot Water Service Valve Pressure Relief Valve Cold Water Service Valve Water Intlet Drain Water Outlet (Ex. NR981-OD)
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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.21) 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 unit will not heat the water if the flow rate is less than The water is cold when only a single fixture is open. 0.5 gallons (2L) per minute. 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 25 Remote Controller The light on the power button does • Has there been a power failure? not come on. • Is the power connected properly? • The temperature setting and the flow meter alarm setting The water temperature changes after a power failure or when the may both need to be reset after a power outage.
- Page 26 Troubleshooting-3 åÃè·ï\é¶Ç Ç®í≤Ç◊Ç≠ÇæÇ≥Ç¢ åÃè·ï\é¶Ç Ç®í≤Ç◊Ç≠ÇæÇ≥Ç¢ Water Quality Damage to the water heater as a result Total Hardness* : 200 mg/L (12 gpg) or less of poor water quality is not covered by Aluminum : 0.05 to 0.2 mg/L or less the Limited Warranty.
- Page 27 åÃè·ï\é¶Ç Ç®í≤Ç◊Ç≠ÇæÇ≥Ç¢ åÃè·ï\é¶Ç Ç®í≤Ç◊Ç≠ÇæÇ≥Ç¢ Check for an Error Code on the Remote Controller If there is a problem with the unit, a numerical error code will flash on the remote controller. If this occurs, take appropriate measures as listed below. Flashing When an error code appears, the display and the operation light will flash together.
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Page 28: Follow-Up Service
Follow-up Service Requesting Service First follow the instructions in the troubleshooting section ( p.23 to p.27). 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,... -
Page 29: Gas Conversion
Before the gas conversion is performed, verify the proper gas conversion kit with your water heater model on the table provided below. Conversion Kit Model Conversion Type CK-48 NR981-OD, NR981-SV Propane to Natural Gas CK-49 NR981-OD, NR981-SV Natural Gas to Propane CK-50... -
Page 30: 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. Specifications Specification Item Model Name NR981-OD Type Installation Outdoor Wall Mounted Air Supply/Exhaust Power Vented Ignition... - Page 31 Specifications Specification Item Model Name NR981-DVC Type Installation Indoor Wall Mounted Air Supply/Exhaust Power Vented Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.5 GPM (2 L/min.) Dimensions (Height) x (Width) x (Depth) 23.6" (600mm) x 13.8" (350mm) x 11.0" (280mm) Weight 58 lbs.
- Page 32 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. Specifications Specification Item Model Name NR981-SV Type Installation Indoor Wall Mounted Air Supply/Exhaust Power Vented Direct Ignition Ignition...
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