Noritz NRC71 DV Owner's Manual

Noritz NRC71 DV Owner's Manual

Condensing tankless gas water heater

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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)
SBB8067-3
Rev. 01/17
Models : NRC711-DV (For USA and Canada)
NRC711-OD (For USA only)
NRC661A-DV (For USA and Canada)
NRC661A-OD (For USA only)
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
*SBB8067*

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Summarization of Contents

Owner's Guide Introduction and Safety Warnings
Product Models and Manufacturer
Lists the available models (NRC711-DV, NRC711-OD, NRC661A-DV, NRC661A-OD) and the manufacturer.
Critical Safety Warning
Highlights potential fire or explosion risks if manual instructions are not followed.
Safety Icons and Hazard Identification
Risk Level Icons Explained
Defines DANGER, WARNING, and CAUTION icons and their severity levels.
Common Safety Icons
Illustrates and explains icons for electric shock, high temperature, prohibited actions, etc.
Flammable Liquid Hazards
Details risks of flammable vapors and safe storage of flammable products.
Scalding Hazards
Warns about severe burns from hot water temperatures over 125°F (52°C).
Operational Safety Precautions
Model-Specific Safety Instructions
Safety guidelines for NRC711-DV/NRC661A-DV and NRC711-OD/NRC661A-OD models.
Gas Leak and Fire Prevention
Instructions on what to do if a gas leak is detected and explosion hazards.
Handling Gas Valves and Repairs
Guidance on using gas valves and when to call a service technician.
Water Damage Safety
Warning against using the water heater if any part has been submerged in water.
Installation and Environmental Safety
Exhaust Vent and Installation Location Warnings
Prohibits indoor exhaust vent terminals and installation in RVs or boats.
Clearance Requirements
Specifies minimum clearances for installation around the unit.
Combustible Material and Chemical Warnings
Advises against placing combustibles or using chemicals near the heater.
Installation Service Requirements
States installation must be performed by a qualified professional.
General Precautions and Maintenance Safety
Child Supervision and Electrical Safety
Precautions for child supervision, touching power cords with wet hands, and grounding.
Unit Operation and Maintenance Safety
Guidelines for unit operation, maintenance, and avoiding burns.
Ventilation and Condensate Handling
Warnings about blocking ventilation and using condensate.
Operational Guidelines and Environmental Considerations
Water Quality and Unit Operation
Advice on water quality, cleaning filters, and proper unit operation.
Installation Altitude and Remote Controller Care
Specifies installation altitude limits and care instructions for the remote controller.
Freezing Prevention and Maintenance
Measures to prevent freezing and general maintenance advice.
Condensing Water Heater Technology Overview
How Condensing Heaters Work
Explains the heat exchange process in condensing tankless water heaters.
Condensate Discharge and Steam
Information on condensate discharge and the occurrence of white steam.
Unit Components and Identification
Indoor Model Components (NRC711-DV/NRC661A-DV)
Identifies key parts of the indoor wall-mounted unit.
Outdoor Model Components (NRC711-OD/NRC661A-OD)
Identifies key parts of the outdoor wall-mounted unit.
Display Window Functions and Indicators
Display Window Overview
Explains the purpose of the display window for status and error codes.
Interpreting Display States
Describes common displays like burner status, temperature, and hot water flow.
Error Code Indication
Explains how numerical error codes are displayed for unit problems.
Initial Operation Procedure
Pre-Use Checks
Steps to take before the first use after installation.
Step-by-Step Startup
Guide on opening valves, checking water, and connecting power.
Basic Water Heater Operation (No Remote)
Checking Power and Hot Water Flow
Steps to confirm power connection and water flow.
Adjusting Temperature and Turning Off
How to mix water for desired temperature and turn off the unit.
Preventing Scalding
Critical warning about hot water temperatures and burn prevention.
Remote Controller Features and Indicators
Remote Controller Overview
Introduction to the optional RC-7651M remote controller.
Understanding Controller Buttons
Explanation of Power, Setting, and Flow Meter Alarm buttons.
Interpreting Controller Display
Details on Burner On, Priority, Temperature, Flow Meter, and Error Code indicators.
Setting and Using the Water Heater with Remote
Powering On and Setting Temperature
Procedure for powering on the unit and setting desired temperature.
Temperature Settings (Fahrenheit and Celsius)
Details on available temperature settings in both °F and °C modes.
Severe Scalding Danger and Prevention
High Temperature Burn Risk
Warns that temperatures over 125°F (52°C) can cause instant severe burns or death.
Vulnerable Users and Precautions
Highlights risks for children, disabled, elderly, and advises feeling water before use.
High Temperature Warning Display
Describes the display warning for temperatures 125°F/55°C or higher.
Flow Meter Alarm Setup and Usage
Preparing for Flow Meter Alarm
Steps to prepare the unit and set temperature before configuring the alarm.
Adjusting Flow Meter Alarm Settings
Guide on how to set the desired volume for the flow meter alarm.
Using Flow Meter Alarm with Water Flow
Instructions on turning hot water on and off based on alarm sounds.
Alarm Notification and Tub Filling Scenarios
Details on alarm sounds and potential overflow scenarios with tub filling.
Remote Controller Sound Settings
Muting Remote Controller Beeps
Procedure to mute the sound emitted by remote controller buttons.
Adjusting Maximum Output Temperature
Procedure for Temperature Adjustment
Steps to change the maximum hot water supply temperature via the remote controller.
Preventing Freezing Damage to the Water Heater
Freeze Prevention Heater Functionality
Explains how the unit's heater prevents freezing when powered.
Protecting External Plumbing
Advice on insulating or protecting plumbing outside the unit.
Measures for Extreme Cold Temperatures
Steps to take when outside temperatures are extremely low.
Draining Water for Long-Term Storage
CAUTION Before Draining
Warning to wait for the unit to cool before draining to avoid burns.
Procedure for Draining the Unit
Step-by-step instructions for draining water from the unit.
Restarting the Water Heater After Storage
Post-Drainage Checks and Startup
Steps to ensure the unit is ready for operation after being drained.
Condensate Trap Filling Importance
Emphasizes filling the condensate trap to prevent dangerous gas entry.
Periodic Maintenance and Inspection
Unit Inspection Checklist
Regular checks for air supply, combustible materials, leaks, and vent blockages.
Remote Controller Cleaning
Instructions for cleaning the optional remote controller.
Water Drain Valve and Filter Maintenance
Cleaning the Water Drain Valve Filter
Step-by-step guide to cleaning the filter in the water drain valve.
Water Quality and Heat Exchanger Maintenance
Hard Water and Scale Buildup
Explains issues from hard water and the need for flushing the heat exchanger.
Water Quality Standards
Table detailing recommended water quality levels for warranty.
Isolation Valves for Maintenance
Information on optional isolation valves for easier maintenance.
Troubleshooting Error Codes
Error Code Display and Interpretation
How to check for and understand error codes on the display or remote.
Common Error Causes and Actions
Troubleshooting steps for ignition, condensate, combustion, and scale issues.
Troubleshooting Operation and Temperature Issues
Initial Operation Problems
Solutions for unit not igniting or failing to ignite.
Hot Water Availability Problems
Diagnosing issues like no hot water, no water, or incorrect temperatures.
Hot Water Temperature Adjustments
Addressing issues with water being too hot, not hot enough, or fluctuating.
Flow Rate and Heating Issues
Troubleshooting cold water on single fixture and unit not firing.
Troubleshooting Hot Water Volume
Inconsistent Hot Water Amount
Diagnosing issues with the amount of hot water at a fixture not being constant.
Flow Meter Alarm and Tub Filling Issues
Problems related to tub filling and the flow meter alarm feature.
Decreased Hot Water Availability Over Time
Addressing reduced hot water supply due to scale buildup or filter clogs.
Remote Controller and Operational Sounds Troubleshooting
Remote Controller Malfunctions
Troubleshooting issues with the remote controller's power light, display, or casing.
Understanding Normal Operational Sounds
Explains normal sounds from the fan, motor, and valves during operation.
Other Troubleshooting Issues
Heater Stops Burning During Operation
Steps to take if the heater stops firing during use.
Water Appearance and Discharge Issues
Troubleshooting white smoke, turbid water, blue water, and drain discharge.
Service, Warranty, and Reinstallation
Requesting Service and Support
Information on contacting Noritz for service and required details.
Warranty and Repair Parts
Details on warranty registration, period of stocking repair parts.
Unit Reinstallation Guidelines
Considerations for reinstalling the unit at a different location.
Gas Conversion Procedure and Safety
Gas Conversion Requirements
Explains when gas conversion is needed and who performs it.
Gas Conversion Kit Information
Details on conversion kits, parts, and necessary equipment.
Product Specifications and Performance
Technical Specifications (NRC711-DV/OD)
Detailed specs for model NRC711 including dimensions, power, and materials.
Performance Data
Information on gas consumption, hot water capacity, and temperature settings.
Model Specifications and Performance
Technical Specifications (NRC661A-DV/OD)
Detailed specs for model NRC661A including dimensions, power, and materials.
Performance Characteristics
Data on gas consumption, hot water capacity, and temperature settings for NRC661A.

Table of Contents