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Installation Manual
CONDENSING TANKLESS GAS WATER HEATER
Potential dangers from accidents during installation and use are divided into the following three
categories. Closely observe these warnings, they are critical to your safety.
DANGER
WARNING
CAUTION
WARNING:
If the information in this manual is not followed exactly, a fire or explosion may result
causing property damage, personal injury or death.
Prohibited
Requests to Installers
• In order to use the water heater safely, read this installation manual carefully, and follow the in-
stallation instructions.
• Failures and damage caused by erroneous work or work not as instructed in this manual are not
covered by the warranty.
• Check that the installation was done properly in accordance with this Installation Manual upon
completion.
• After completing installation, please either place this Installation Manual in a plastic pouch and
attach it to the side of the water heater (or the inside of the pipe cover or recess box if applicable),
or hand it to the customer to retain for future reference. Also, be sure to fill in all of the required
items on the warranty and to hand the warranty to the customer along with the Owner's Guide.
Low NOx Approved by SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)
SBB8068-3
Rev. 01/17
NRC711-OD
(Outdoor Installation)
NRC661A-OD
DANGER indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation which,
if not avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation which,
if not avoided, may result in minor or moderate injury.
Disconnect
Power
CAUTION
FOR USE IN RESIDENTIAL OR MANUFACTURED HOME
APPLICATIONS.
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.
When applicable, installation must conform with the Manufactured
Home Construction and Safety Standard, Title 24 CFR, Part 3280.
Noritz America reserves the right to discontinue, or change at any
time, the designs and/or specifications of its products without notice.
(Outdoor Installation)
Ground
NORITZ AMERICA
CORPORATION
Be sure to do
*SBB8068*
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Related Manuals for Noritz ecoTOUGH NRC71 OD
Summary of Contents for Noritz ecoTOUGH NRC71 OD
- Page 1 14 ng/J or 20 ppm Home Construction and Safety Standard, Title 24 CFR, Part 3280. (Natural Gas Only) Noritz America reserves the right to discontinue, or change at any time, the designs and/or specifications of its products without notice. SBB8068-3 Rev.
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Page 2: Included Accessories
Included Accessories The following accessories are included with the unit. Check for any missing items before starting installation. Part Shape Q’ty Part Shape Q’ty Owner's Guide, Warranty, Cross Recessed Installation Manual Head Screw each (this document) The accessories listed below are not Optional Accessories included with the units, but may be necessary for installation. -
Page 3: Before Installation
Before Installation WARNING Check the Gas • Check that the rating plate indicates the correct type of gas. • Check that the gas supply line is sized for 157,000 Btuh for NRC711-OD series. (120,000 Btuh for NRC661A-OD series.) Check the Power •... - Page 4 WARNING • Avoid places where fires are common, such as those where gasoline, benzene and adhesives are handled, or places in which corrosive gases (ammonia, chlorine, sulfur, ethylene compounds, acids) are present. Prohibited Using the incorrect voltage may result in fire or cracking. •...
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Page 5: Installation Clearances
Installation Clearances WARNING Before installing, check for the following: Install in accordance with relevant building and mechanical codes, as well as any local, state or national regulations, or in the absence of local and state codes, to the National Fuel Gas Code ANSI Z223.1/ NFPA 54 –... - Page 6 Clearance Requirements from Vent Terminations to Building Openings * All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code, ANSI Z223.1. Vent Terminal Area Where Terminal is Not Permitted Air Supply Inlet Description US Non-Direct Vent Installation Clearance above grade, veranda, porch, 12 in (30 cm) deck, or balcony...
- Page 7 Installation Securing to the wall • The weight of the device will be applied to the wall. If the strength of the wall is not sufficient, reinforcement must be done to prevent the transfer of vibration. • Do not drop or apply unnecessary force to the device when installing. Internal parts may be damaged and may become highly dangerous.
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Page 8: Gas Piping
The installer must be professionally trained to do such work and must always follow all local and national codes and regulations. Gas line sizing calculations must be performed for every installation. Please contact Noritz America at 866-766-7489 if you have any questions or concerns. Gas Type The gas type indicated on the water heater rating plate (NG or LP) must match the type of gas being supplied to the water heater. - Page 9 Refer to the NFPA 54 for details. Please contact Noritz for details. For corrugated stainless steel tubing (CSST) capacity tables, please consult with the manufacturer.
- Page 10 BTU/Cubic Foot ratings. For simplification of your calculations, 1 Cubic Foot of Gas is approximately equivalent to 1000 BTU. Sample Gas Line Instructions Noritz Condensing Tankless Gas Water Heater 1. Size each outlet branch starting from the furthest (NRC711-OD series : 157,000 Btuh) using the Btuh required and the length from the meter.
- Page 11 Table 3. Maximum Undiluted Propane (LP) Delivery Capacity in Thousands of BtuH (0.5” WC Pressure Drop) Length (including fittings) Pipe 100' 125' 150' 175' 200' Size (3m) (6m) (9m) (12m) (15m) (18m) (24m) (30m) (38m) (45m) (53m) (60m) 1/2" 3/4" 1"...
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Page 12: Water Piping
Installation and service must be performed by a qualified plumber. In the Water Piping Commonwealth of Massachusetts, this product must be installed by a licensed plumber or gas fitter in accordance with the Massachusetts Plumbing and Fuel Gas Code 248 CMR Sections 2.00 and 5.00. Observe all applicable codes. This appliance is suitable for combination potable water and space heating applications. - Page 13 • In order for the freeze prevention heaters to operate, the water heater must have power at all times. Damage to the water heater as a result Total Hardness* : 200 mg/L (12 gpg) or less of the below is not covered by the Noritz Aluminum : 0.05 to 0.2 mg/L or less America Limited Warranty.
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Page 14: Water Treatment
= 1, 2, 3, 4, F # = 1, 2, 3, 4, 5, 6, 7, 8, 9, A, b, C, d, E, F Damage to the water heater as a result of the items below is not covered by the Noritz America Limited Warranty. - Page 15 Damage to the water heater due to Scale Build-up is not covered by the water heater's warranty. To clear the error code “C #*~C #*”, the Heat Exchanger must be flushed. If the error code “C #*” is displayed and flashing in the Display Window, please contact Noritz America (866-766-7489).
- Page 16 1. Open the Front Cover. 2. Connect the blue connector***** marked "FLUSH" for flushing on the Circuit Board. located 3. Then the code “CCC” is displayed on the 4. Turn on the circulating pump to circulate the flushing solution through the water heater for 1 hour at a rate of 1.5 gallons per minute or more.
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Page 17: Condensate Piping
Condensate Piping CAUTION Due to the acidic nature of the condensate, be sure to properly drain and if necessary, treat the condensate prior to disposal. Damage caused by improperly handled condensate is not covered by the warranty. • This water heater is a high efficiency, fully condensing appliance which produces acidic condensate during operation. - Page 18 Condensate piping to floor drain Condensate piping with pump Display window Display window USE NON-CORROSIVE MATERIALS USE NON-CORROSIVE MATERIALS DO NOT REDUCE TO LESS THAN 1/2” DO NOT REDUCE TO LESS THAN 1/2” KEEP AS SHORT AS POSSIBLE KEEP AS SHORT AS POSSIBLE 1/2"...
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Page 19: Plumbing Applications
Combination Potable Water and Space Heating System If the Air Handler does not control the water flow automatically, the Scale detection feature will not work. Notes: 1. Noritz recommends the use of an Isolation Kit with the installation. These kits include an integrated shut-off and service valve with unions and a pressure relief valve. -
Page 20: Electrical Wiring
Electrical Wiring Consult a qualified electrician for the electrical work. Do not connect electrical power to the unit until all electrical wiring has been completed. Disconnect Power This appliance must be electrically grounded in accordance with local codes, or in the absence of local codes, with the National Electrical Code, ANSI/NFPA 70. - Page 21 135 F (57 C) 140 F (60 C) OFF= Check Check • Applicable Model Noritz Condensing Tankless Gas Water Heater * Remarks [125 °F / 55 °C] Celsius display mode RC-7651M Optional remote controller Fahrenheit display mode Install the optional remote controller according to the instructions in the Installation Guide (p. 26).
- Page 22 Connecting Remote Controller Cord to Unit • Keep the remote controller cord away from the freeze prevention heaters in the unit. • Tie the redundant cord outside the water heater. Do not put the extra length inside the equipment. • The remote controller cord can be extended up to 83' (25m) with 18AWG wire. •...
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Page 23: Maintenance
Maintenance Periodically check the following to ensure proper operation of the water heater. • The venting system must be examined periodically by a qualified service technician to check for any leaks or corrosion. • The burner flame must be checked periodically for a proper blue color and consistency. •... -
Page 24: Lighting Instructions
WARNING A fire or explosion may result if these instructions are not followed, which may cause lose of life, personal injury or property damage. Lighting Instructions This water heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner. - Page 25 Dimensions 13.3" (338mm) < inch (mm) > 4-φ0.5" (φ13mm) 2-0.3"×0.5" (6.5×13mm) OBLONG HOLE 4.7" (120mm) 0.4" (10mm) 6.7" (170mm) 13.8" (350mm) 3.3" (85mm) 1.6" (40mm) 13.1" (334mm) 8.5" (217mm) 2.0" (50mm) 1.1" (27mm) 1.1" (28mm) 0.4" (11mm) AIR INLET DISPLAY WINDOW AIR INLET 0.4"...
- Page 26 For Installers: Read this installation guide Optional Remote Controller RC-7651M carefully before carrying out installation. Installation Guide NORI T Z AMERI C A CORPORATI O N Note Do not connect power to the water heater before the remote controller has been properly installed. Recommended installation location of the remote controller is in a bathroom.
- Page 27 Installation 3. Remove the cover of the remote control, 1. Apply Wall Packing to the rear side of the mark the location of the screw holes, and remote controller. drill holes for the wall anchors. 2. Connect the remote controller wires to the 4.
- Page 28 Installing the Remote Controller Outdoor Junction Box 5. Slide the box nut over the remote controller 1. Insert the remote controller wires through the wires and screw it onto the wall pipe. wall pipe and secure the wall pipe to the remote controller.