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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
installation 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.
SBB809L
Rev. 08/14
NRC663-FSV (EZTR40)
(Indoor Installation)
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
Low NOx
Approved by
SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)
Ground
FOR USE IN RESIDENTIAL 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.
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
Be sure to do
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Related Manuals for Noritz NRC663-FSV
Summary of Contents for Noritz NRC663-FSV
- Page 1 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. Low NOx Noritz America reserves the right to discontinue, or change at any Approved by time, the designs and/or specifications of its products without SCAQMD notice.
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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, Anchoring Screw Installation Manual 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 DANGER Checkup • Check the fixing brackets and vent pipe yearly for damage or wear. Replace if necessary. WARNING Precautions on Vent Pipe Replacement • The vent system will almost certainly need to be replaced when this appliance is being installed. Only use vent materials that are specified in this Installation Manual for use on this appliance. -
Page 4: Choosing Installation Site
Choosing Installation Site * Locate the appliance in an area where leakage from the unit or connections will not result in damage to the area adjacent to the appliance or to the lower floors of the structure. When such locations cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the appliance. - Page 5 The Commonwealth of Massachusetts: The water heater can be used for hot water only and not in a combination of domestic and space heating. For Venting Manufacturers Requirements, see websites listed below: Noritz N-Flex vent kit www.noritz.com http://support.noritz.com/...
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Page 6: 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 7 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 Installations Clearance above grade, veranda, porch, deck, or balcony 12 in (30 cm) 4 ft (1.2 m) below or to side of opening;...
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Page 8: Securing To The Wall
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. -
Page 9: Filling The Condensate Trap With Water
Filling the condensate trap with water When initial start up, make sure that you perform the following procedures. DANGER This is to prevent dangerous exhaust gases from entering the building. Failure to following procedure could result in severe personal injury or death. After installing the drain pipe, make sure that the area around the unit is well ventilated;... -
Page 10: Vent Pipe Installation
Vent Pipe Installation (Indoor Installation Only) WARNING CARBON MONOXIDE POISONING Follow all vent system requirements in accordance with relevant local or state regulation, or, in the absence of local or state code, in the U.S. to the National Fuel Gas Code ANSI Be sure to do Z233.1/NFPA 54 –... - Page 11 Maximum Vent Length Adjustment DIP switch The unit can be adjusted to accommodate longer vent runs; refer to the below table to find the maximum vent length. Adjust the DIP switch according to the vent condition noted in the tables below. •...
- Page 12 Venting Installation Instructions (General Information) Property damage, personal injury or death can result if these instructions are not followed. They are a guide for professional installers generally familiar with the installation and maintenance of heating equipment and related vent systems. ・Only manufacturer specified vent parts may be used for this equipment.
- Page 13 WARNING This unit is suitable only for vertical vent. Vertical Vent Termination with Polypropylene N-Flex system • Terminate at least 6' (1.8m) from the combustion air Storm intake of any appliance, and 3' (0.9m) from any other Collar Roof Flashing building opening, gas utility meter, service regulator etc.
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Page 14: Combustion Air
Supply combustion air to the units as per the National Fuel Gas Code, ANSI Z223.1 Combustion Air and in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1. Provide adequate combustion air so as to not create negative pressure within the builbing. •... -
Page 15: 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. - Page 16 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 17 BTU/Cubic Foot ratings. For simplification of your calculations, 1 Cubic Foot of Gas is approximately equivalent to 1000 BTU. Sample Gas Line Instructions 1. Size each outlet branch starting from the furthest Noritz Condensing Tankless Gas Water Heater using the Btuh required and the length from the meter. Barbecue (120,000 Btuh) 2.
- Page 18 Table 3. Maximum Undiluted Propane (LP) Delivery Capacity in Thousands of BtuH (0.5” WC Pressure Drop) [Schedule 40 Metalic Pipe] Length (including fittings) Pipe 100' 125' 150' 200' Size (3m) (6m) (9m) (12m) (15m) (18m) (21m) (24m) (27m) (30m) (38m) (45m) (60m) 1/2"...
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Page 19: 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 20 • 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 21: Water Treatment System
= 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 22 Heat Exchanger must be flushed. is set to "Flushing Mode". from an authorized Noritz wholesaler.
- Page 23 located...
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Page 24: 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 25 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 26: 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 27: 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 28: Adjusting Set Temperature
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. 33). -
Page 29: Connecting Remote Controller Cord To Unit
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. •... -
Page 30: 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 31: 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 32 Dimensions <inch (mm) > 17.7"(450mm) 15.6"(397mm) 2.2"(56mm) HOT WATER OUTLET(3/4") 4× Ø0.5"(Ø13mm) 6×0.24"×0.4"(6×10mm)OBLONG HOLE COLD WATER INLET(3/4") WATER DRAIN VALVE 6.7"(170mm) (WATER FILTER) 5.5"(140mm) WATER DRAIN VALVE 18.3"(464mm) 0.4"(10mm) 9.4"(240mm) 3.9"(100mm) 17.7"(450mm) 2.8"(70mm) 4.7"(120mm) 10.9"(278mm) 1.4"(36mm) 1.0"(25mm) O.D.Ø3.9"(Ø99.5mm) FLUE COLLAR I.D.Ø2.4"(Ø60.8mm) DISPLAY WINDOW AIR INLET...
- Page 33 Optional Remote Controller RC-7651M carefully before carrying out installation. Installation Guide NORITZ AMERICA CORPORATION 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.
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Page 34: Installation
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.