Noritz NC1991-OD Installation Manual
  1. Manuals
  2. Brands
  3. Noritz Manuals
  4. Water Heater
  5. NC1991-OD
  6. Installation manual
Noritz NC1991-OD Installation Manual

Noritz NC1991-OD Installation Manual

Tankless gas water heater
Hide thumbs Also See for NC1991-OD:
Table of Contents

Advertisement

Quick Links

See also: Owner's Manual

Installation Manual

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
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.
CERTIFIED
R
SBA8872-2
Rev. 03/13
NC1991-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
FOR USE IN COMMERCIAL 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 Propane Installation Code (NSCNGPIC).
Noritz America reserves the right to discontinue, or change at any time, the
Low NOx
designs and/or specifications of its products without notice.
Approved by
*ENERGY STAR
SCAQMD
water heating and space heating system.
14 ng/J or 20 ppm
(Natural Gas Only)
(Outdoor Installation)
Ground
CAUTION
applies when used in a combination potable
®
NORITZ AMERICA
CORPORATION
Be sure to do
*SBA8872*

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the NC1991-OD and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Noritz NC1991-OD

Summary of Contents for Noritz NC1991-OD

  • Page 1: Installation Manual

    National Fuel Gas Code, ANSI Z223.1/NFPA 54- latest edition and/or CSA B149.1, Natural Gas and Propane Installation Code (NSCNGPIC). CERTIFIED Noritz America reserves the right to discontinue, or change at any time, the Low NOx designs and/or specifications of its products without notice.

  • 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) Remote Controller Remote Controller Cord (6ft (2m)) (See p.

  • Page 3: Quick Connect Multi System Installation

    Quick Connect Multi System Installation • The Quick Connect Multi System allows the installation of two units together utilizing only the Quick Connect Cord. The Quick Connect Cord is 6 ft.(2m) long. Install the units 2-18" (50 - 457mm) apart from each other to ensure the cord will be able to reach between the units.

  • Page 4: 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 199,900 Btuh. Check the Power • The power supply required is 120VAC, at 60Hz. May result in fire or electric shock.
  • Page 5 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. Using the incorrect voltage may result in fire or cracking. Prohibited •...

  • 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 and in Canada, in accordance with NSCNGPIC. Vent Terminal Area Where Terminal is Not Permitted Air Supply Inlet Canadian Non-Direct Vent US Non-Direct Vent...

  • 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: Gas Piping

    Instructions Sample Gas Line 1. Size each outlet branch starting from the furthest Noritz Tankless Gas Water Heater using the Btuh required and the length from the Barbecue (199,900 Btuh) (50,000 Btuh) meter.
  • Page 10 Gas Line Sizing for a Noritz Tankless Gas Water Heater Adapted from UPC 1997 Maximum Natural Gas Delivery Capacity in Cubic Feet per Hour (0.60 Specific Gravity, 0.5" WC Pressure Drop) Length in Feet Pipe Size 10' (3m) 20' (6m) 30' (9m) 40' (12m) 50' (15m) 60' (18m) 70' (21m) 80' (24m) 90' (27m) 100' (30m) 125' (37.5m) 1/2"...

  • Page 11: 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 12 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 • Mount a check valve and a shut off valve (near the inlet). other chemicals. • In order for the client to use the water heater • The longer the piping, the greater the heat loss. comfortably, 98.1 to 491 kPa (14 to 70 PSI) of Try to make the piping as short as possible. pressure is needed from the water supply.

  • Page 13: Water Treatment System

    (> 239 mg/L) Hard Required * Install Noritz Isolation Valves to allow for flushing. * Install Noritz Isolation Valves to allow for flushing. ** Flushing is required if a water treatment device is not installed. ** Flushing is required if a water treatment device is not installed.

  • Page 14: Plumbing Applications

    Set the Aquastat to 10°F (5°C) below the set Expansion Tank output temperature. (Install according Isolation 4. Noritz recommends the use of an Isolation Kit with to local code) Kit(*4) the installation. These kits include an integrated shut-off and service valve with unions and a pressure relief valve.

  • Page 15: 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 improper and dangerous operation. Verify proper operation after servicing. Field wiring to be performed at time of appliance installation. WARNING Electrical Shock Hazard Do not turn power on until electrical wiring is finished. Disconnect power before servicing. Failure to do so may result in death or serious injury from electrical shock.

  • Page 16: Remote Controller

    Remote Controller • Applicable Model Noritz Tankless Gas Water Heater RC-9018M Remote controller Install the remote controller according to the instructions in the Installation Guide. (p. 28). * Only one remote controller can be connected to the water heater. A malfunction may occur if two or more remote controllers are connected. • This unit can be programmed so that it will default to one of four temperatures if the remote controller is removed [185°F (85°C), 140°F (60°C), 135°F (57°C), 120°F (50°C)]. To change the default temperature, adjust the dip switches as described below. The default temperature is 120°F (50°C). 1. Disconnect electrical power to the water heater. 2. Remove the front cover of the water heater (4 screws). 3. Disconnect the remote controller. Adjust the dip switches as illustrated below. 4. Replace the front cover of the water heater (4 screws). 5. Reconnect electrical power to the water. * Do not change any other dipswitches. * High temperature.

  • Page 17: 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 300' (90m) with 18AWG wire. • Use a Y type terminal with a resin sleeve. (Without the sleeve, the copper wire may corrode and cause problems). • Be sure to hand tighten when screwing to the terminal block. Power tools may cause damage to the terminal block. Remote controller cord • For extensions, a 26' (8m) cord can be purchased (Part # RC-CORD26) or use 18AWG wire. • Install according to the National Electrical Code and all applicable local codes. 1. Check to make sure that the remote controller cord has plenty of slack in order to reach the external connection terminal block.
  • Page 18 Changing Other Features Adjusting the Temperature / Water Quantity Display Note: The setting must be done within the first 10 minutes of connecting electrical power to the water heater. Table of Setting Items Item Choices (factory defaults shaded) Celsius/Fahrenheit °F (Fahrenheit) / gal °C (Celsius) / L display mode. Remote Controller Power On/Off Button Display MENU Button ▲/▼ Buttons ENTER Buttton Setting Procedure 1. Turn the water heater off by pressing the Power On/Off Button on the remote controller. 2. Disconnect, then reconnect electrical power to the water heater. 3. Press the MENU Button inside the cover, select "Initial settings" using the ▲/▼ Buttons. 4. Press the ENTER button, the "Initial settings" screen appears on the display.

  • Page 19: Pump Wiring

    * This feature is not available when using the Quick Pump Wiring Connect Multi System feature. Connecting the pump control wire 1. Leave enough slack so that the pump control wires will stay connected if the unit is removed from the Pump Control wall. Wire Tag 2. Remove the front cover of the heater (4 screws). 3. Cut off the connector at the end of the pump Crimping Terminal control wires. 4. Wire the pump control wires through the wiring throughway and connect them to the wiring inside the pump (this will be the power supply for the pump, do not also connect 120VAC to the pump). Wiring If a large pump is being used (greater than 85W) use Supplies Power for Throughway the voltage from these wires as the signal to close a Circulating Pump normally open relay through which 120VAC will be (Use a Relay for supplied directly from a wall circuit to the pump. Larger Pumps) 5. Replace the front cover.

  • Page 20: Connecting Quick Connect Cord

    For Quick Connect Multi System Installation Connecting Quick Connect Cord-2 use part #QC-2 only. (sold separately). Caution The wire coloring on the Quick Connect Cord-2 will not be the same as the wire coloring of the connection plug inside the unit. 1.Red 1.Red 1.White 1.Red * The remote controller can be connected to 2.Black 2.Black 2.Green 2.Black either unit A or B. Do not connect a remote 3.White 3.White 3.Red 3.White 4.Green 4.Green 4.Black 4.Green...

  • Page 21: 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 22: Lighting Instructions

    CAUTION Handling after trial operation • If the unit will not be used immediately, close off all gas and water shutoff valves, drain all of the water out of the unit and the plumbing system to prevent the unit and system from freezing, and bleed the gas out of the gas line. Freezing is not covered by the warranty. 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. 1. Read the safety information in the installation manual or on the front of the water heater. 2. Turn off all electrical power to the unit. 3. Do not attempt to light the burner by hand. 4. Turn the gas control manual valve (external to the unit) clockwise to the off position. 5. Wait five minutes to clear out any gas. If the smell of gas remains, stop, and follow the instructions on page 3 of Owner's Guide.
  • Page 23 4-Ø0.5" (Ø13mm) COLD WATER INLET HOT WATER OUTLET WATER DRAIN VALVE HEIGHT OF EACH FITTINGS (VIEW FROM TOP) FROM BOTTOM OF CASE 9.5" (241mm) NC1991-OD 2.4" (60mm) 1.8" (45mm) HOT WATER OUTLET 1.4" (36mm) COLD WATER INLET 2.2" (55mm) GAS INLET 2.2"...
  • Page 24 Multi-System Install one system controller (SC-301-6M(-EXT)) for every six units. Dipswitch Settings (for remote controllers RC-7647M or RC-7650M when used with system controller SC-201-6M) Note: When this water heater is used with remote controllers RC-7646M-2, RC-7649M, or RC-9018M, it is not necessary to follow this procedure. When using the remote controller RC-7647M or RC-7650M (ºC temperature display), a dipswitch change will be necessary on all water heaters connected to the system controller.
  • Page 25 B-1. Example of Recirculation with a Multi-System (Recirculation system) This system will make hot water more quickly available to remote fixtures. The pump will circulate water through the loop until the entire loop is warm, and then the system controller will turn off the pump until the loop cools down.
  • Page 26 B-2. Example of Installation with a Storage Tank and Recirculation System (Tank recirculation system) The pump will push water through the Multi-System to heat up the tank. When the temperature of the thermostat is high, the system controller will turn off the pump until the the temperature cools down.
  • Page 27 Multi-System Wiring (Use SC-301-6M (-EXT)) * Connect these to the Unit 1 remote control terminal block in each unit System Controller No.6 No.5 No.4 No.3 No.2 Power Remote control terminal block Remote Controller Cord Remote Controller Unit 2 * The remote controller terminal location may differ depending on the unit.

  • Page 28: Remote Controller

    Requests to Installers Remote Controller ● In order to use the water heater safely, read this installation guide carefully, and follow the installation instructions. RC-9018M ● Failures and damage caused by erroneous work or work not as instructed in this manual are not covered by the warranty. ● Refer to the Installation Manual provided with the water heater for complete installation details. Installation Guide NORITZ AMERICA CORPORATION In order to use this product safely, read this installation manual carefully and follow the installation instructions. ● Potential dangers from accidents during installation and use are described below. Closely observe these warnings, they are critical to your safety. CAUTION CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. CAUTION The remote controller is not water resistant. Keep it dry. CAUTION • Do not connect power to the system unit until the remote controller installation is complete. • Be sure to fasten the mounting screws tightly by hand so that the remote controller will be secure. * Do not use electric drivers, impact drivers and so forth. Tightening with excessive force may cause the mounting bracket to be damaged and lead to failures. • Install the remote controller on an even wall surface.
  • Page 29 Included Parts List (The value in ( ) indicates the quantity.) Mounting Machine Round countersunk Raised countersunk Remote Controller Wall anchor bracket screw head wood screw head screw (For junction box installation) Notes on the Installation Location Connection of Remote Controller Cord White Connector To Remote controller • The remote should be installed in an easily accessible location. Y-shaped terminals To Water heater • Avoid installing in a place where water (two-core) or steam can come into contact with the * Confirm the connection with the labels at...
  • Page 30 5. Attach the remote controller to the mounting 2. Remove the decorative frame from the remote bracket. Insert the bottom of the remote controller. (The remote controller is inserted controller into the groove at the bottom of the in the decorative frame.) bracket and push in the 2 hooks on top of the remote controller completely. * If it is difficult to attach, do not try to force it Main remote as it may result in broken hooks. Check for controller body proper alignment in the groove or for loose wires obstructing the remote controller.

This manual is also suitable for:

Nrc1111-od ecotough

Table of Contents