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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
SBA8726
Rev. 11/11
NCC1991-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, 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 Home
Low NOx
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 time, the
SCAQMD
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.
(Outdoor Installation)
Ground
CAUTION
applies when used in a combination potable
®
NORITZ AMERICA
CORPORATION
Be sure to do
*SBA8726*
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Summary of Contents for Noritz NCC1991-OD
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Page 1: Installation Manual
Installation Manual NORITZ AMERICA CORPORATION CONDENSING TANKLESS GAS WATER HEATER NCC1991-OD (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. Q’ty Q’ty Part Shape Part Shape Owner's Guide, Warranty, Tapping 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 fi... - Page 5 WARNING • Avoid places where fi res 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. Prohibited Using the incorrect voltage may result in fi re or cracking. •...
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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 and in Canada, in accordance with NSCNGPIC. Vent Terminal Area Where Terminal is Not Permitted Air Supply Inlet Outdoor Installation Clearance...
- 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. Maintain the following clearances to any Illustration opening in any building: For installations in the USA, •...
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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 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 10: 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 11 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"...
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Page 12: 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 13 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 •...
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Page 14: 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. -
Page 15: 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 16 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"...
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Page 17: 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. Hot Water Return Adjust the flow using a globe valve and verify the flow rate with the maintenance monitors. -
Page 18: 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 19: 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. 35). * 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 20 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 21 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.
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Page 22: 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 23: 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 24: Maintenance
Periodically check the following to ensure proper Maintenance 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 25: 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 26 WATER DRAIN VALVE WIRING THOROUGHWAY (AC120V) COLD WATER INLET (VIEW FROM TOP) HEIGHT OF EACH FITTING FROM BOTTOM OF CASE 10.0" (255mm) WIRING THOROUGHWAY NCC1991-OD (AC120V) 8.4" (214mm) CONDENSATE DRAIN 0.8" (20mm) 3.9" (99mm) 2.8" (70mm) 1.7" (44mm) HOT WATER OUTLET 2.2"...
- Page 27 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 28 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 29 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 30 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 31 A. Installation without a recirculation system (Using external system controller) (Standard System)
- Page 32 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 33 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 34 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.
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Page 35: 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 36: 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 37 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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