Noritz NCC1991-DV Installation Manual
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Noritz NCC1991-DV Installation Manual

Noritz NCC1991-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
WARNING:
If the information in this manual is not followed exactly, a fi re 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 fi ll 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
SBA8747
Rev. 11/11
NCC1991-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
FOR USE IN COMMERCIAL, 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 and/or
CSA B149.1, Natural Gas and Propane Installation Code (NSCNGPIC).
When applicable, installation must conform with the Manufactured
Low NOx
Home Construction and Safety Standard, Title 24 CFR, Part 3280 or the
Canadian Standard CAN/CSA-Z240 MH Mobile Homes, Series M86.
Approved by
Noritz America reserves the right to discontinue, or change at any
SCAQMD
time, the designs and/or specifi cations of its products without notice.
14 ng/J or 20 ppm
*ENERGY STAR
(Natural Gas Only)
water heating and space heating system.
(Indoor Installation)
Ground
CAUTION
applies when used in a combination potable
®
NORITZ AMERICA
CORPORATION
Be sure to do
*SBA8747*

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  • Page 1 Installation Manual NORITZ AMERICA CORPORATION CONDENSING TANKLESS GAS WATER HEATER NCC1991-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. Q’ty Q’ty Part Shape Part Shape Owner's Guide, Warranty, Tapping Screw Installation Manual each (this document) Remote Controller Remote Controller (See p. 28) Cord (6ft (2m)) Drain hose (With clamp)

  • 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 DANGER Checkup • Check the fi xing 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 specifi...

  • 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 fl oors 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 Item Check Illustration • There must be a clearance of 24" (600mm) or more in front of the Flue terminal. • This restriction will not be applied to an area where an effective shield makes a There must be no 12"...
  • 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. Vent Terminal Area Where Terminal is Not Permitted Air Supply Inlet Outdoor Combustion Air Indoor Combustion Air...

  • Page 10: 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 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: Filling The Condensate Trap With Water

    Filling the condensate trap with water The condensate trap can be fi lled before connecting the vent pipe. Filling the condensate trap before vent pipe installation. Prior to initial start up, make sure that you fi ll the condensate trap with water. DANGER This is to prevent dangerous exhaust gases from entering the building.

  • Page 12: 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 13 Maximum Vent Length Adjustment Dipswitches The unit can be adjusted to accommodate longer vent runs; refer to the below table to fi nd the maximum vent length based on the number of elbows. Adjust the dip switches according to the vent condition noted in the tables below.
  • Page 14 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 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. • The PVT-HL termination may be used in place of elbows as the horizontal vent terminations.
  • Page 16 Horizontal Vent Termination- 3" (75m) 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 3" (75mm) or Straps for horizontal terminations. 4" (100mm) 1"...
  • 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 and turn ON dip switch 3 if combustion air will be supplied form the indoors as illustrated to the right. Refer to page 28 for the location of the dip switch bank.
  • 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 adequate combustion air so as to not create negative pressure within the building. • Provide two permanent openings to allow circulation of combustion air.

  • Page 19: Gas Piping

    Gas Piping Follow the instructions from the gas supplier. The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of ⁄ psig (3.5 kPa). 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...
  • Page 20 Gas Line Sizing for a Noritz Condensing 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 10' (3m) 20' (6m) 30' (9m) 40' (12m) 50' (15m) 60' (18m) 70' (21m) 80' (24m) 90' (27m) 100' (30m) 125' (37.5m) Size 1/2"...

  • Page 21: Water Piping

    Installation and service must be performed by a qualifi ed plumber. In the Water Piping Commonwealth of Massachusetts, this product must be installed by a licensed plumber or gas fi tter 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 22 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 23: 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 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 effi ciency, fully condensing appliance which produces acidic condensate during operation.
  • Page 25 Condensate piping to floor drain Condensate piping with pump NORITZ NORITZ Condensing Condensing Tankless Gas Tankless Gas Water Heater Water Heater DO NOT ADD DO NOT ADD ANY VALVES ANY VALVES 1/2" PVC pipe 1/2" PVC pipe 3/8" ID tubing* 1/2"...

  • Page 26: Plumbing Applications

    Plumbing Applications Recirculation System Notes: 1. Size the pump to provide a maximum of 2 GPM (7.5 L/min.) through the system at 10 ft (3m) of head plus piping losses. Adjust the flow using a globe valve and verify the Hot Water Return flow rate with the maintenance monitors.

  • Page 27: Electrical Wiring

    Consult a qualifi ed 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 28: Remote Controller

    Remote Controller • Applicable Model Noritz Condensing Tankless Gas Water Heater RC-9018M Remote controller Install the remote controller according to the instructions in the Installation Guide. (p. 44). * Only one the remote controller can be connected to the water heater. A malfunction may occur if two or more remote controllers are connected.
  • Page 29 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. •...
  • Page 30 Changing Other Features Adjusting the Temperature / Water Quantity Display Note: The setting must be done within the fi rst 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.

  • Page 31: 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.

  • Page 32: 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...

  • Page 33: Maintenance

    Maintenance Periodically check the following to ensure proper operation of the water heater. • The venting system must be examined periodically by a qualifi ed service technician to check for any leaks or corrosion. • The burner fl ame must be checked periodically for a proper blue color and consistency. •...

  • Page 34: 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 35 WATER DRAIN VALVE WIRING THOROUGHWAY (AC120V) COLD WATER INLET HEIGHT OF EACH FITTING (VIEW FROM TOP) FROM BOTTOM OF CASE WIRING THOROUGHWAY 10.0" (255mm) NCC1991-DV (AC120V) 8.4" (214mm) CONDENSATE DRAIN 0.8" (20mm) 3.9" (99mm) 2.8" (70mm) 1.7" (44mm) HOT WATER OUTLET 2.2"...
  • Page 36 Multi-System Install one system controller (SC-301-6M) 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 37 B-1. Example of Recirculation with a Multi-System (Recirculation system) This system will make hot water more quickly available to remote fi xtures. 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 38 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 39 Multi-System Wiring (Use SC-301-6M) Unit 1 System Controller No.6 * Connect these to the No.5 remote control terminal No.4 block in each unit No.3 No.2 90 90 B5 B5 Power Remote control terminal block Remote Controller Cord Remote Controller Unit 2 * The remote controller terminal location may differ depending on the unit.
  • Page 40 A. Installation without a recirculation system (Using external system controller) (Standard System)
  • Page 41 B-1. Example of Recirculation with a Multi-System (Using external system controller) (Recirculation system) This system will make hot water more quickly available to remote fi xtures. 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 42 B-2. Example of Installation with a Storage Tank and Recirculation System (Using external system controller) (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 43 Multi-System Wiring (Use SCU-301-12M) CAUTION • The below diagram shows the connection of 3 units to the system controller. When connecting 4 or more units, follow the same procedure. • Connect the water heaters to the system controller follwing the detailed wiring instructions included with the system controller.

  • Page 44: Remote Controller

    ● 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.

  • Page 45: Included Parts List

    Included Parts List (The value in ( ) indicates the quantity.) Mounting Raised countersunk Raised countersunk Machine 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 •...
  • Page 46 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 contoller 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.

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