Installation Manual NORITZ AMERICA CORPORATION CONDENSING TANKLESS GAS WATER HEATER NERC98DV (GQ-C2857WS-FF ET US) (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 WARNING CAUTION DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
1. Included Accessories Part Shape Q’ty The following accessories are included with the unit. Check for any missing items before starting installation. Part Shape Q’ty Anchoring Screw 5 Owner's Guide, Installation Manual (this document) 1 each Remote Controller (See p. 34) 1 Remote Controller Cord (6ft (2m)) 1 2. Optional Accessories Part Shape Q’ty The accessories listed below are not included with the units, but may be necessary for 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. (See Typical Plumbing diagram).
. Before Installation DANGER Checkup • Check the fixing 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 specified in this Installation Manual for use on this appliance. Refer to the "Vent Pipe Installation" section for details.
. 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 installation locations cannot be avoided, a suitable drain pan, adequately drained, must be installed under the appliance. The pan must not restrict combustion air flow. * As with any water heating appliance, the potential for leakage at some time in the life of the product does exist.
CAUTION • The water heater is designed for indoor installation only. Never install it outdoors or in a bathroom, it may be damaged or a fire may be caused. • Consult with the customer concerning the location of installation. • Install the water heater in an area that allows for the proper clearances to combustible and noncombustible construction. Consult the rating plate on the appliance for proper clearances.
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 the Natural Gas and Propane Installation Code CSA B149.1 - latest edition for detailed requirements.
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 the Natural Gas and Propane Installation Code CSA B149.1.
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 the Natural Gas and Propane Installation Code CSA B149.1.
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.
Filling the condensate container with water The condensate container can be filled before connecting the vent pipe. Filling the condensate container before vent pipe installation. DANGER Prior to initial start up, make sure that you fill the condensate container with water. This is to prevent dangerous exhaust gases from entering the building. Failure to fill the condensate container could result in severe personal injury or death.
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 the Natural Gas and Propane Installation Code CSA B149.1 – latest edition. General Requirements Maximum Vent Lengths • This is a Category IV appliance.
Maximum Vent Length Adjustment Dipswitches The unit can be adjusted to accommodate longer vent runs; refer to the below table to find the maximum vent length based on the number of elbows. Adjust the dip switches according to the vent condition noted in the tables below. Note: By default, the unit has been set to the " 1 short length" condition. When adjusting the dip switches for longer vent runs, the BTUH input of the appliance will be reduced by up to 5%.
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 CSA B137.3 CSA B181.2 Exhaust Vent/Air Intake PVC-DWV ANSI/ASTM D2665 CSA B137.
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) Hanger Straps Intake Insert Bird Screen* in End of 90 Elbow or wider between the intake and exhaust when installing the vent piping. * If 3’ (0.9m) distance between Intake and Exhaust cannot be ensured, the installation can be carried out only in the installation method shown in page 17.
3" (75mm )PVC Concentric Termination 3" (75mm) or 4" (100mm) Intake* Hanger Straps Strap 3" (75mm) or Slope the 4" (100mm) Vent Upward Exhaust* • The concentric termination may be shortened, but not lengthened from its original factory supplied length. • 3" (75mm) or 4" (100mm) PVC or CPVC pipe 1" (25mm) to may be used with the concentric termination. 2" (50mm) Maintain the same vent pipe diameter from the water heater flue to the termination.
Vent Pipe Installation Alternate Horitzontal Vent Termination- PVC/CPVC Materials Only * When 3’ (0.9m) distance between Intake and Exhaust cannot be ensured. * Can not use Hood termination (PVT-HL). * Insert the bird screen. 90° elbow vertical setting (downward). * Ensure at least 3ft (0.9m) or more distance between the near edge of the air intake pipe or exhaust pipe to the inside corner of a wall. * Intake and exhaust should face the same direction. Intake and exhaust should keep the same pressure zone.
Vent Pipe Installation (When supplying combustion air from the indoors (SV, non-direct vent)) DANGER When installing this water heater in an area with a large amount of lint such as a commercial Laundromat, direct-vent ("-DV") system must be used. The "-SV" configuration (using an SV conversion kit) is prohibited. When installing this water heater in a mobile home, all combustion must be drawn directly from the outdoors. The "-SV" configuration (using SV conversion kit) is prohibited.
Combustion Air Supply combustion air to the units as per the National Fuel Gas Code, ANSI Z223.1latest edition and in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1-latest edition. Provide adequate combustion air so as to not create negative pressure within the building. • Provide two permanent openings to allow circulation of combustion air.
9. Gas Piping Follow the instructions from the gas supplier. CAUTION The guidelines and examples we have provided in this manual section are for reference only. The sizing and installation of the gas system for this water heater, as with any gas appliance, is the sole responsibility of the installer. The installer must be professionally trained to do such work and must always follow all local and national codes and regulations. Gas line sizing calculations must be performed for every installation.
WARNING Pressure Test The appliance and its gas connections must be leak tested before placing the appliance in operation. 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 ½ psig (3.5 kPa). We do not recommend pressure testing in excess of ½ psig (3.5kPa).
Table 1. For Less than 8” WC initial supply pressure Maximum Natural Gas Delivery Capacity (0.
Table 3. Maximum Undiluted Propane (LP) Delivery Capacity in Thousands of BtuH (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 combination potable water and space heating applications. It cannot be used for space heating applications only.
Hot water piping • Do not use lead, PVC, iron or any piping which has been treated with chromates, boiler seal or other chemicals. • The longer the piping, the greater the heat loss. Try to make the piping as short as possible. • Use mixing valves with low water resistance. Use shower heads with low pressure loss. • If necessary, use a pump or other means to ensure that the supply water pressure to the inlet of the heater does not fall below 29 PSI when the maximum amount of water is being demanded.
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. If this water heater will be installed in an application where the supply water is hard, Scale Build-up may cause damage to the Heat Exchanger.
Procedure for Flushing the Heat Exchanger This procedure is only intended for use by a qualified service professional or authorized Noritz Service Representative. Any unauthorized use of this procedure may result in voiding the warranty.Please contact Noritz America (866-766-7489) for additional support. ** , it means If the error code “C #*~C #*” is flashing on the Remote C there is Scale Build-up in the Heat Exchanger.The Heat Exchanger needs to be flushed*** to remove the Scale Build-up.
䍾㻼㼞㼛㼏㼑㼐㼡㼞㼑㻌䠎㻚㻌Flushing the Heat Exchanger (For Single Unit) 䍿 1. Open the Front Cover. 2. Connect the blue connector***** marked "FLUSH" near the Circuit Board. Water Heater Circuit Board Connect ***** The connector color is blue and labeled “FLUSH”. Manifold Plate FLUSH CCC 3. Then the code “CCC” is displayed on the 㻾㼑㼙㼛㼠㼑㻌㻯㼛㼚㼠㼞㼛㼘㼘㼑㼞㻚 4. Turn on the circulating pump to circulate the flushing solution through the water heater for 1 hour at a rate of 1.5 gallons per minute or more. 5.
㻵㼚㻌㼏㼍㼟㼑㻌㼛㼒㻌㼠㼔㼑㻌䇾㻽㼡㼕㼏㼗㻌㻯㼛㼚㼚㼑㼏㼠㻌㻹㼡㼘㼠㼕㻌㻿㼥㼟㼠㼑㼙㻌㻼㼞㼛㼏㼑㼐㼡㼞㼑䇿 1. Connect the blue connector marked "FLUSH" for unit needing to be flushed. (The water heater is isolated from Quick Connect Multi system when the “blue connector for flushing” is connected. Not need to disconnect the 㻽㼡㼕㼏㼗 Connect Cord.) Sub Water Heater Main Water Heater Connect Circuit Board Manifold Plate FLUSH Quick Connect Cord Remote Controller Do not need to disconnect. 2.
11. 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 efficiency, fully condensing appliance which produces acidic condensate during operation. The water heater incorporates a collection and removal system which must be properly drained in order to ensure proper operation of this appliance.
Condensate piping to floor drain Condensate piping with pump Condensing Tankless Gas Water Heater Condensing Tankless Gas Water Heater DO NOT ADD ANY VALVES DO NOT ADD ANY VALVES 1/2" PVC pipe Slope pipe downwards 1/4" per foot. Floor drain The end of the drain pipe must have an air gap. MAINTAIN CLEARANCE 1/2" PVC elbow 1/2" PVC pipe Slope pipe downwards 1/4" per foot. The end of the drain pipe must have an air gap.
12. Plumbing Applications Recirculation System Condensing Tankless Gas Water Heater 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 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.
13. 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 * Remarks [125 °F / 55 °C] RC-7651M Remote controller Celsius display mode Fahrenheit display mode Install the remote controller according to the instructions in the Installation Guide (p. 41). * Only one remote controller can be connected to the water heater. A malfunction may occur if two or more remote controllers are connected. * The water heater has been factory set to allow a maximum temperature setting of [120 °F / 50 °C].
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.
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.
Connecting Quick Connect Cord-2 For Quick Connect Multi System Installation 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. * The remote controller can be connected to either unit A or B. Do not connect a remote controller to both units. * Disconnect the remote controller from either unit A or B prior to installing the Quick Connect Cord. Quick Connect Cord-2 1.Red 2.Black 3.
14. 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.
16. Dimensions < inch (mm)> 17.7" (450mm) 4-Ø0.5" (13mm) 6- 0.24" x 0.4" (6mm x 10mm) OBLONG HOLE 6.7" (170mm) 1.4" (36mm) 2.8" (70mm) 3.9" (100mm) 5.5" (140mm) 6.7" (170mm) 9.4" (240mm) 5.5" (140mm) Ø 4.5" (114mm) Ø 3.5" (89.5mm) 1.1" (28mm) AIR INLET 18.3" (464mm) 17.6" (448mm) 5.9" (150mm) 9.1" (232mm) Ø 4.5" (114mm) Ø 3.5" (89.5mm) FLUE COLLAR 24.2" (615mm) 2.4" (61mm) 1.6" (40mm) 0.4" (10mm) 23.1" (586mm) 26.2" (665mm) 5.5" (140mm) 3.9" (100mm) 2.8" (70mm) 1.4" (36mm) 0.
For Installers: Read this installation guide carefully before carrying out installation. Remote Controller RC-7651M 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.
