Noritz N-0931M Installation Manual
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Noritz N-0931M Installation Manual

Noritz N-0931M Installation Manual

Tankless gas water heater
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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
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.
CERTIFIED
R
SAR8567-5
Rev. 08/08
N-0931M
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
Low NOx
Approved by
SCAQMD
Accepted For Use
City of New York
Department of Buildings
MEA 19-03-E
(Indoor/Outdoor Installation)
Ground
CAUTION
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 designs and/or specifications
of its products without notice.
NORITZ AMERICA
CORPORATION
Be sure to do
*SAR8567 C*

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Summary of Contents for Noritz N-0931M

  • Page 1 Installation Manual NORITZ AMERICA CORPORATION TANKLESS GAS WATER HEATER N-0931M (Indoor/Outdoor 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

    The following accessories are included with the unit. Included Accessories Check for any missing items before starting installation. Part Shape Part Shape Q’ty Q’ty Owner's Guide, Warranty, Tapping Screw Installation Manual each (this document) Remote Controller Remote Controller (See p. 21) Cord (10ft) The accessories listed below are not Optional Accessories...

  • 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. long. Install the units 2-19" apart from each other to ensure the cord will be able to reach between the units.

  • Page 4: Before Installation

    • Check the fixing brackets and vent pipe yearly for damage or wear. Replace if necessary. WARNING Check the Gas • Check that the rating plate indicates the N-0931M correct type of gas. 250,000 BTU 11,000 BTU • Check that the gas supply line is sized for 0.80...

  • Page 5: 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 6 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 7: 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 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 Indoor Installation Outdoor Installation...
  • Page 9 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. Maintain the following clearances to any Illustration opening in any building: •...

  • Page 10: Installation

    Installation Securing to the wall • The weight of the device will be applied to the wall. If the strength of the wall is not suffi- cient, 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 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 Horizontal Vent Termination • Terminate at least 12" above grade or above snow line. Hanger Straps • Terminate at least 7' above a public walk- Elbow way, 6' from the combustion air intake of any appliance, and 3' from any other Wall Termination building opening, gas utility meter, ser-...
  • Page 13 Supply combustion air to the units as per the National Fuel Gas Code, ANSI Z223.1 and Combustion Air in Canada, in accordance with NSCNGPIC. • Provide two permanent openings to allow circulation of combustion air. 15" • Make each opening 250 square inches if they 20"...

  • Page 14: Gas Piping

    1/8" NPT screw with an allen wrench and connecting the appropriate pressure gauge. Instructions Sample Gas Line 1. Size each outlet branch starting from the furthest Noritz N-0931M using the Btuh required and the length from the Barbecue (250,000 Btuh) (50,000 Btuh) meter.
  • Page 15 Gas Line Sizing for a Noritz N-0931M Adapted from UPC 1997 Maximum Natur Natural Gas Delivery Capacity in Cubic Feet per Hour (0.60 Specific Gravity, 0.5" WC Pressure Drop) Length in Feet Pipe Size 100' 125' 1/2" 3/4" 1" 1 1/4"...

  • Page 16: 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 suitable for potable water and space heating applications.
  • Page 17 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 •...

  • Page 18: Water Treatment

    *Install Noritz Isolation Valves to allow for flushing. **Flushing is required if a water softener is not installed. Water Treatment System Shutoff Valve City Water Supply Cold to Water Heater NORITZ N-0931M Optional Sediment Filter Pressure Shutoff Valve Relief Valve Water Treatment Device...

  • Page 19: Plumbing Applications

    Plumbing Applications Recirculation System Notes: 1. Size the pump to provide a maximum of 2 GPM through the system at 10 ft 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 20: Electrical Wiring

    Consult a qualified electrician Electrical Wiring 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: Remote Controller

    To keep the water heater off, let the unit sit for 30 sec. to return to the original display. • The N-0931M can be programmed so that it will default to one of four temperatures if the remote controller is removed (180, 140, 130, 120°F). To change the default temperature, connect the temperature selection wire as shown in the above diagram.

  • Page 22: 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' with 18AWG wire. •...

  • Page 23: Pump Wiring

    * This feature is not available when using the Quick Con- Pump Wiring nect 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 Pump Control from the wall.

  • Page 24: Connecting Quick Connect Cord

    For Quick Connect Multi System Installation Connecting Quick Connect Cord use a Quick Connect Cord (sold separately). Caution The wire coloring on the Quick Connect Cord will not be the same as the wire coloring of the connection plug inside the unit. 1.Red 1.Red 1.White...

  • Page 25: Maintenance

    Periodically check the following to ensure proper Maintenance 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 26: 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.
  • Page 27 Dimensions N-0931M 17.7" < inch > HEIGHT OF EACH FITTINGS 4- 0.5" FROM BOTTOM OF CASE 6-0.24 x 0.4" OBLONG HOLE N-0931M 1.7" HOT WATER OUTLET 18.3" 6.7" 2.2" COLD WATER INLET 5.5" 17.6" 0.4" 9.4" 3.9" 4" FLUE COLLAR GAS INLET 2.2"...
  • Page 28 B-1. Example of Recirculation with a Multi-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 29 B-2. Example of Installation with a Storage Tank and Recirculation System The pump will push water through the Multi-System to heat up the tank. When the return temperature is high, the flow within the device will be limited to 2.6 GPM*.
  • Page 30 Multi-System Wiring (Use SC-201-6M) Unit 1 Disconnect this Connector System Controller No.6 * Connect these to the No.5 remote control terminal No.4 block in each unit Disconnect for system controller No.3 No.2 90 90 B5 B5 Power DPSW 12345678 Remote control terminal block System select connectors Remote Controller Cord...
  • Page 31 Remote Controller RC-7649M 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 32 Installation 3. Remove the cover of the remote control, 1. Apply Wall Packing to the rear side of the remote controller. mark the location of the screw holes, and drill holes for the wall anchors. 2. Connect the remote controller wires to the 4.

  • Page 33: Installing The Remote Controller Outdoor Junction Box

    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.

This manual is also suitable for:

N-0751m

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