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CONDENSING 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
R
Low NOx Approved
by SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)
SBB80JP-2
Rev. 01/17
Models : NRC98DV (GQ-C2857WS-FF US)
NRC98OD (GQ-C2857WS US)
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.
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 - latest edition
and/or the Natural Gas and Propane Installation Code CSA B149.1 -
latest edition.
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
*SBB80JP*
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Table of Contents
Related Manuals for Noritz GQ-C2857WS US
Summary of Contents for Noritz GQ-C2857WS US
- Page 1 Home Construction and Safety Standard, Title 24 CFR, Part 3280 or the (Natural Gas Only) 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 SBB80JP-2 Rev.
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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 Be sure 1. Turn off the hot water supply to do. will settle on the floor. 2. Turn off the power to the water WHAT TO DO IF YOU SMELL GAS. heater • Do not try to light any 3. Turn off gas and water supply appliance. valve. • Do not touch any electrical 4. Call the nearest Noritz agent switch; do not use any phone in your building. Explosion Hazard ; • Immediately call your gas supplier from a neighbor’s If the temperature and pressure relief phone. Follow the gas supplier’s valve is dripping or leaking, have a Prohibited instructions. qualified service technician replace it. • If you cannot reach your gas Do not plug or remove the valve. supplier, call the fire department. C. Use only your hand to turn Failure to follow these instructions can re- the gas valve knob. Never use...
- Page 4 Important Safety Information (Continued) WARNING Do not place the exhaust vent terminal Carbon Monoxide Poisoning Hazard. in an indoor environment by means of Do not install this water heater in a recreational vehicle or on a boat. adding walls and ceiling (Do not en- Prohibited Prohibited Do not install this water heater close using corrugated sheets, etc.) in a mobile home when using SV Exhaust vent conversion kit (“-SV” configuration). terminal Do not use combustible chemicals such as oil, gasoline, benzene etc. in the near the heater or the exhaust vent terminal. Unit Prohibited Do not store or use gasoline or other Carbon monoxide poisoning or fire may...
- Page 5 Do not allow small children to bath unsupervised. death, serious illness or other reproductive harm. Prohibited This product may contain such substances, be their origin from fuel combustion (gas, oil) Do not touch the power or components of the product itself. cord with wet hands. Don’t touch Electric with a wet The gas conversion kit shall be installed by a Shock. hand. qualified service agency in accordance with the manufacturer’s instructions and all Consult the nearest Noritz agent if applicable codes and requirements of the the water heater location needs to authority having jurisdiction. The be changed. Be sure information in the instructions must be to do. followed to minimize the risk of fire or explosion or to prevent property damage, Contact a qualified service personal injury, or death. The qualified technician for any necessary service agency is responsible for the proper repairs, service or maintenance. Don’t installation of this kit. The installation is not disassemble the equipment.
- 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. 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.
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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 ..................14 Muting the Remote Controller ..............16 Adjusting the Maximum Output Temperature ........17 Preventing Damage from Freezing ............. 18 Regular Maintenance ................... 21 Troubleshooting ................... 24 Follow-up Service ..................29 Specifications ....................31... -
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 Exhaust... -
Page 9: General Parts
General Parts -1 Main Unit [NRC98DV (GQ-C2857WS-FF US)] Indoor Wall Mounted, Power Vent/Sealed Model Intake Pipe Flue Collar Front Cover Water Drain Valve (with Water Filter) (Inside Water Inlet) p.22) Pressure Relief Valve Water Supply Valve Gas Supply Valve Drain Pipe Discharges the condensate. [NRC98OD (GQ-C2857WS US)] Outdoor Wall Mounted, Power Vented Model Exhaust Vent * The above illustration shows an example of installation. The exact installation configuration may be slightly different. -
Page 10: Remote Controller
General Parts -2 Remote Controller (RC-7651M) What is actually displayed depends on how the water heater is set. Setting Buttons Burner On Indicator 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. p.12) Power On/Off Button Temperature Setting For turning the... -
Page 11: Initial Operation
Initial Operation Before the first use of your water heater, do the following: 1 through 4 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. -
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.: 120°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 Note : An error code will be displayed when this water heater detects scale build-up in the heat exchanger. The error code may be more frequently displayed when the unit is set to a high temperature. (125°F or higher) Noritz recommends that water temperature is set as low as possible to prevent scale build-up in the heat exchanger.
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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. °C (°F) : The temperatures settings below are only examples.
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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 Change the Turn off the Press and hold the flow temperature using power. meter alarm set button until 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
* 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 Preventing Damage from Freezing-2 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 Preventing Damage from Freezing-3 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.
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Page 21: Regular Maintenance
Regular Maintenance-1 Periodic Inspection CAUTION To prevent burns or scalding, turn off the power button and wait until the equipment cools before performing maintenance. Be sure to do. air supply vent [When supplying combustion air from the indoors] For smear or blockage Check For dust and soot in Check... - Page 22 Regular Maintenance-2 Periodic Maintenance Water Drain Valve (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 avoid burns, wait until the equipment cools down before draining the water.
- Page 23 # = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 Damage to the water heater as a result of below is not covered by the Noritz America Limited Warranty. To ensure full warranty coverage, treat or condition water that exceeds the target levels provided in this table.
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Page 24: Troubleshooting
Troubleshooting-1 Initial Operation • Check for reversed plumbing or crossed pipes. Unit does not attempt to ignite when water is running. • Check the water drain valve filter. ( p.22) Unit attempts to ignite but fails • Reset unit and try again. There may be air in the gas line. •... - Page 25 (Continued) • The unit will not heat the water if the flow rate is less than The water is cold when only a 0.5 gallons (2L) per 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 26 Troubleshooting-2 Remote Controller The light on the power button does • Has there been a power failure? 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 27 (Continued) The water appears blue • Coloration to a blue color may be noticed from small traces of copper ion contained in the water and fat The bath tub/wash-basin has turned (furring). However, there are not problems concerning blue health. Coloration of the bath tub/wash-basin can be prevented by cleaning frequently.
- Page 28 Contact the installer or Noritz America Technical Support for assistance. [When supplying combustion Clean the air supply vent.( p.21) If the display continues, contact the nearest Noritz air from the indoors] agent. The air supply vent may be clogged. Abnormal combustion, Have a professional check the gas supply pressure.
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Page 29: Follow-Up Service
Period of Time for Stocking Repair Parts Noritz will stock repair and maintenance parts for this unit for the time period from the date of the original installation as follows: twelve (12) years for the heat exchanger and ten (10) years for remaining parts. - Page 30 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.
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Page 31: Specifications
• The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. Specifications Item Specification Model Name NRC98DV (GQ-C2857WS-FF US) NRC98OD (GQ-C2857WS US) Type Installation Indoor Wall Mounted Outdoor Wall Mounted Air Supply/Exhaust Power Vented...