Noritz NRC661-DV Installation Manual
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Noritz NRC661-DV Installation Manual

Noritz NRC661-DV Installation Manual

Condensing tankless gas water heater
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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
If the information in this manual is not followed exactly, a fire or explosion may result
WARNING:
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.
CERTIFIED
R
SBB801K
Rev. 01/13
NRC661-DV
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)
(Indoor Installation)
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 and/or CSA B149.1, Natural Gas and Pro-
pane Installation Code (NSCNGPIC).
Noritz America reserves the right to discontinue, or change at
any time, the designs and/or specifications of its products with-
out notice.
NORITZ AMERICA
CORPORATION
Be sure to do
*SBB801K*

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  • Page 1 Installation Manual NORITZ AMERICA CORPORATION CONDENSING TANKLESS GAS WATER HEATER NRC661-DV (Indoor Installation) 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 indicates an imminently hazardous situation which, DANGER if not avoided, will result in death or serious injury.

  • Page 2: Included Accessories

    Included Accessories The following accessories are included with the unit. Check for any missing items before starting installation. Shape Shape Part Q’ty Part Q’ty Owner's Guide, Warranty, Tapping 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

    • If this product will be installed in an area where snow is known to accumulate, protect the vent termination from blockage by snow drifts or damage from snow falling off of roofs. Check the Gas • Check that the rating plate indicates the NRC661-DV (eco TOUGH) 120,000 BTU correct type of gas. 15,000 BTU 10.5"...

  • 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 CAUTION • Avoid installation above gas ranges or stoves. • Avoid installation between the kitchen fan and stove. If oily fumes or a large amount of steam are present in the installation location, take measures to prevent the fumes and steam from Prohibited entering in the equipment.

  • 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 <When supplying combustion air from the outdoors> * All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code, ANSI Z223.1 and in Canada, in accordance with NSCNGPIC. Item Check Illustration...
  • Page 8 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 and in Canada, in accordance with NSCNGPIC. Vent Terminal Area Where Terminal is Not Permitted Air Supply Inlet Outdoor Combustion Air Indoor Combustion Air...

  • Page 9: 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 10: 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 11: 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 12 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 based on the number of elbows. Adjust the DIP switch according to the vent condition noted in the tables below.
  • Page 13 Venting With PVC or CPVC This appliance can be vented with non cellular core plastic pipe materials as specified in the below table. Vent installations in Canada which utilize plastic vent systems must comply with ULC S636. Item Material United States Canada Schedule 40 PVC ANSI/ASTM D1785...
  • Page 14 Vent Pipe Installation Horizontal Vent Termination- PVC/CPVC Materials Only • Intake and exhaust should face the same direction. Intake and exhaust should keep the same 5.9” pressure zone. Exhaust Intake • Insert the bird screen. 90° elbow vertical setting (downward). 2ft.
  • Page 15 Vent Pipe Installation Horizontal Vent Termination- PVC/CPVC Materials Only • As illustrated on the left, make sure to keep a distance of 3' (0.9m) or wider between the intake and exhaust when installing the vent piping. Hanger Insert Bird Screen* Intake in End of 90 Elbow Straps...
  • Page 16 Horizontal Vent Termination- 3" (75mm) Concentric PVC/CPVC Termination • The concentric termination may be shortened, but not lengthened from its original factory supplied length. Hanger The concentric termination may only be used Intake* Straps for horizontal terminations. 1" (25mm) to Strap •...
  • Page 17 Vent Pipe Installation (When supplying combustion air from the indoors (SV, non-direct vent)) * Dip switch No.3 is turned on. • Disconnect power to the water heater before changing the DIP switch. Failure to perform this step will result in a "733" code displayed on the Display Window and a cease in operation. If this occurs, disconnect, then reconnect power to the water heater to reset the system.
  • Page 18 Supply combustion air to the units as per the National Fuel Gas Code, ANSI Z223.1 Combustion Air and in Canada, in accordance with CSA-B149.1. • Provide two permanent openings to allow cir- culation of combustion air. 9" (225mm) • Make each opening 180 square inches if they provide indoor air, and 100 square inches for 20" (500mm) outdoor air. • If the unit is installed in a mechanical closet, provide a 24" (600mm) clearance in front of the unit to the door. • If combustion air will be provided through a duct, size the duct to provide 60 cubic feet of fresh air per minute. 20" (500mm) 9" (225mm) Openings supplying indoor air ▲The illustration is an example.

  • Page 19: Gas Piping

    Gas Piping Follow the instructions from the gas supplier. CAUTION The guidelines and examples we have provided in this manual section are for reference only. The sizing and installation of the gas system for this water heater, as with any gas appliance, is the sole responsibility of the installer. 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 20 WARNING Pressure Test The appliance and its gas connections must be leak tested before placing the appliance in operation. The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than ½ psig (3.5 kPa). We do not recommend pressure testing in excess of ½ psig (3.5kPa). If it must be done, the appliance and its individual shutoff valve must be completely disconnected from the gas supply piping system during the test process.
  • Page 21 Table 1. For Less than 8” WC initial supply pressure Maximum Natural Gas Delivery Capacity (0.5” Pressure Drop) Length (including fittings) Pipe 100' 125' Size (3m) (6m) (9m) (12m) (15m) (18m) (21m) (24m) (27m) (30m) (38m) 3/4" 1" 1 1/4" 1,390 1 1/2"...
  • Page 22 Table 3. Maximum Undiluted Propane (LP) Delivery Capacity in Thousands of BtuH (0.5” WC Pressure Drop) Length (including fittings) Pipe 100' 125' 150' 200' Size (3m) (6m) (9m) (12m) (15m) (18m) (21m) (24m) (27m) (30m) (38m) (45m) (60m) 1/2" 3/4" 1"...

  • Page 23: 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. It cannot be used for space heating applications only.
  • Page 24 Supply water piping Hot water piping • Do not use PVC, iron, or any piping which has been • Do not use lead, PVC, iron or any piping which treated with chromates, boiler seal or other chemicals. has been treated with chromates, boiler seal or other chemicals. • Mount a check valve and a shut off valve (near the inlet). • The longer the piping, the greater the heat loss. • In order for the client to use the water heater Try to make the piping as short as possible.

  • Page 25: Water Treatment System

    Water Treatment If this water heater will be installed in an application where the supply water is hard, the water must be treated with either the Noritz H2Flow or ScaleShield or a water softener. Refer to the below tables for suggested treatment and maintenance measures to be taken based on the water hardness level. Damage to the water heater as a result of water in excess of 12 gpg (200 mg/L) of hardness is not covered by the Noritz America Limited Warranty.

  • Page 26: 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. The water heater incorporates a collection and removal system which must be properly drained in order to ensure proper operation of this appliance.
  • Page 27 Condensate piping to floor drain Condensate piping with pump NORITZ NORITZ Condensing Condensing Tankless Gas Tankless Gas Water Heater Water Heater DO NOT ADD ANY VALVES DO NOT ADD ANY VALVES 1/2" PVC pipe 1/2" PVC pipe Slope pipe downwards 3/8"...

  • Page 28: Plumbing Applications

    Plumbing Applications Recirculation System Notes: 1. Size the pump to provide a maximum of 1.5GPM (5.7L/min.) through the system at 10ft (0.3m) of head plus piping losses. Hot Water Return Adjust the flow using a globe valve and verify the NORITZ Cold Water Supply flow rate with the maintenance monitors.

  • Page 29: 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. In Canada, the latest CSA C22.1 Electrical Code. Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improp- er and dangerous operation.
  • Page 30 Adjusting Set Temperature • This unit can be programmed so that it will default to one of three temperatures if the optional remote controller is not used [140 °F (60 °C), 135 °F (57 °C), 120 °F (50 °C)]. To change the default temperature, adjust the DIP switches as described below.

  • Page 31: 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 32: 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. • If the flame does not appear normal, the burner may need to be cleaned. •...

  • Page 33: 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. Do not try to light the burner by hand.
  • Page 34 WATER DRAIN VALVE WATER DRAIN VALVE CONDENSATE DRAIN (WATER FILTER) HEIGHT OF EACH FITTING (VIEW FROM TOP) FROM BOTTOM OF CASE 11.7" (297mm) NRC661-DV 10.0" (253mm) 0.8" (20mm) CONDENSATE DRAIN 4.1" (103mm) 3.8" (96mm) CONDENSATE DRAIN(1/2") 1.8" (45mm) HOT WATER OUTLET 1.2"...
  • Page 35 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.
  • Page 36 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.

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