Installation Manual NORITZ AMERICA CORPORATION TANKLESS GAS WATER HEATER NC380-SV-ASME (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 WARNING CAUTION DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
1. Included Accessories Part Shape The following accessories are included with the unit. Check for any missing items before starting installation. Q’ty Part Tapping Screw 5 Owner's Guide, Warranty, Installation Manual (this document) 1 each Remote Controller (See p. 21) 1 Remote Controller Cord (10ft) 1 Heat Exchanger Inspection report 1 2.
. 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 6-17" apart from each other to ensure the cord will be able to reach between the units. (See Typical Plumbing diagram).
. Before Installation DANGER Checkup • 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 correct type of gas. • Check that the gas supply line is sized for 380,000 Btuh for this unit. NC380-SV-ASME NC380-SV -ASME 380,000 22,500 376 5 0.6 892 10.5 2.0 4 Check the Power • The power supply required is 120VAC, at 60Hz. Using the incorrect voltage may result in fire or electric shock.
. 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. The pan must not restrict combustion air flow.
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 entering in the equipment. Prohibited • Install in a location where the exhaust gas flow will not be affected by fans or range hoods. • Take care that noise and exhaust gas will not affect neighbors.
6. 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 – latest edition. In Canada, see NSCNGPIC for detailed requirements. Required Clearances From Heater Item Check Illustration • Maintain the following clearance from both combustible and non-combustible materials.
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 Air Supply Inlet Clearance A= B= C= D= E= F= G= H= I= J= K= L= M= Above grade, veranda, porch, deck, or balcony Area Where Terminal is Not Permitted Indoor Installation (See p.9) Outdoor Installation (See p.
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.
7. Installation Securing to the wall Be sure to do Item • 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. • Install the unit on a vertical wall and ensure that it is level.
8. Vent Pipe Installation (Indoor Installation Only) WARNING Be sure to do 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 Z233.1/NFPA 54 – latest edition, and in Canada, in accordance with NSCNGPI. Vent Piping • Noritz N-Vent is suggested for the vent system. If N-Vent is not used, a UL listed category III vent system must be used.
Horizontal Vent Termination Elbow Hanger Straps Wall Slope vent Thimble Downwards Termination **1' Min. - 3' Max. Appliance Adapter* * Adapter not required when using Noritz N-Vent. **1' minimum recommended, but not required. Avoid installing elbow directly on flue. Vertical Vent Termination Storm Collar Rain Cap Roof Flashing Roof Jack Firestop/ Support Elbow **1' Min. - 3' Max.
Combustion Air Supply combustion air to the units as per the National Fuel Gas Code, ANSI Z223.1 and in Canada, in accordance with NSCNGPIC. • Provide two permanent openings to allow circulation of combustion air. • Make each opening 380 square inches if they provide indoor air, and 100 square inches for outdoor air. • If the unit is installed in a mechanical closet, provide a 24" clearance in front of the unit to the door.
9. 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 1⁄2 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 1⁄2 psig (3.5 kPa).
Gas Line Sizing for a Noritz Tankless Gas Water Heater Adapted from UPC 1997 Maximum Natur Natural Gas Delivery Capacity in Cubic Feet per Hour (0.60 Specific Gravity, 0.
10. Water Piping Installation and service must be performed by a qualified plumber. In the 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 potable water and space heating applications. Do not use this appliance if any part has been underwater.
Supply water piping • Do not use PVC, iron, or any piping which has been treated with chromates, boiler seal or other chemicals. • Mount a check valve and a shut off valve (near the inlet). • In order for the client to use the water heater comfortably, 98.1 to 491 kPa (14 to 70 PSI) of pressure is needed from the water supply. Be sure to check the water pressure. If the water pressure is low, the water heater cannot perform to its full capability, and may become a source of trouble for the client.
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 a water softener, which removes the hardness, or by using sequestering agents, such as the Noritz Scale Shield, that reduce the amount of scale deposits. Refer to the below tables for suggested treatment and maintenance measures to be taken based on the water hardness level.
11. Plumbing Applications Recirculation System NORITZ Tankless Gas Water Heater Notes: 1. Size the pump to provide a maximum of 2 GPM through the system at 10 ft of head plus piping losses. Adjust the flow using a globe valve and verify the flow rate with the maintenance monitors. 2. Pump Control Signal is the preferred method to control the recirculation pump. For pumps larger than 85W, a relay connection must be used. If the Pump Control Signal is not used, an Aquastat may be used to control the pump.
12. 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.
Remote Controller • Applicable Model Noritz Tankless Gas Water Heater Remote controller RC-7649M Install the remote controller according to the instructions in the Installation Guide (p. 31). • The Noritz Tankless Gas Water Heater 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, the remote controller must be initially installed, and removed after programming.
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. 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.
Pump Wiring * This feature is not available when using the Quick Connect Multi System feature. Connecting the pump control wire PUMP 1. Leave enough slack so that the pump control wires will stay connected if the unit is removed from the wall. 2. Remove the front cover of the heater (4 screws). 3. Cut off the connector at the end of the pump control wires. 4.
For Quick Connect Multi System Installation use a Quick Connect Cord (sold separately). Connecting Quick Connect Cord 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. * The remote controller can be connected to either unit A or B. Quick Connect Cord 1.Red 2.Black 3.White 4.Green 5.Blue 6.Blue 1.Red 2.Black 3.White 4.Green 5.Blue 6.Blue A 1.White 2.Green 3.Red 4.Black 5.Blue 6.Blue 1.Red 2.Black 3.White 4.Green 5.
13. 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. • If the burner needs to be cleaned, it must be performed by a qualified service technician.
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.
15. Dimensions (VIEW FROM TOP) HEIGHT OF EACH FITTING FROM BOTTOM OF CASE 16.9" HOT WATER OUTLET COLD WATER INLET GAS INLET 12.2" 11.9" 9" 7.2" 3.9" 2.6" 3.4" 2.0" 18.7" 3.3" 8.6" 8.4" 7.1" 6.4" 4.9" HOT WATER OUTLET (1") GAS INLET (3/4") COLD WATER INLET (1") WIRING THROUGHWAYS 0.4" 8-6 10 OBLONG HOLE 4- 13 19.1" 11.8" 5.5" 3.9" 18.3" 4.4" 1.3" 5.6" 1" 2.8" 0.8" FLUE COLLAR AND ADAPTER 1.4" AIR INLET 29.5" 28.3" 30.7" LED 0.8" 1.4" 4- 13 8-6 10 OBLONG HOLE AIR INLET 2.8" 0.
Hot Water Supply Hot Water (1 1/4"-2") Unit 6 Expansion Tank Circulation Pump 2 (If Necessary) Circulation Pump 1 G allow for maximum flow rates of the units. * Size the water supply piping to Water supply (1 1/4"-2") Gas Pipe * Set dipswitch 3 to "OFF". (See SC-201-6M Installation Manual) When installing 2 pumps in parallel Pump Connection Wire (for pumps > 85 W, use an external relay) Remote Controller Connect to the "Recirculation System" connector.
Unit 6 Unit 1 Option 2-Unit Control Storage Tank Circulation Pump 1 Storage Tank Circulation Pump 2 (if Necessary) Pump Control Wires (use external relay) Remote Controller System select connector Connect to the “Storage system” connector" G Gas Pipe Option 1-Tank Thermostat Control * If the tank thermostat will control the pump set dipswitch 2 to OFF. (See SC-201-6M Installation Manual) Do not connect more than one pump to the tank thermostat.
Multi-System Wiring (Use SC-201-6M) Unit 1 * Connect these to the remote control terminal block in each unit No.6 Disconnect this Connector System Controller No.5 No.4 Disconnect for system controller No.3 No.
For Installers: Read this installation guide carefully before carrying out installation. Remote Controller RC-7649M 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.
Installation 1. Apply Wall Packing to the rear side of the remote controller. 2. Connect the remote controller wires to the separate remote controller cord. 3. Remove the cover of the remote control, mark the location of the screw holes, and drill holes for the wall anchors. 4. Insert the wall anchors, screw the remote control to the wall and replace the cover.
Installing the Remote Controller Outdoor Junction Box 1. Insert the remote controller wires through the wall pipe and secure the wall pipe to the remote controller. Locate the remote controller wall packing, slide it over the pipe and wires, and apply it to the rear side of the remote. 5. Slide the box nut over the remote controller wires and screw it onto the wall pipe.
