Noritz ecoTOUGH NRC98-DV Installation Manual

Condensing tankless gas water heater

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Owner's manual (32 pages)

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Page 1 Installation Manual NORITZ AMERICA CORPORATION CONDENSING TANKLESS GAS WATER HEATER NRC98-DV (Indoor Installation) NRC83-DV 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. Part Shape Q’ty Part Shape Q’ty Owner's Guide, Warranty, Tapping Screw Installation Manual each (this document) Remote Controller Remote Controller (See p. 29) Cord (6ft (2m)) 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.(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
• Check that the rating plate indicates the correct type of gas. • Check that the gas supply line is sized for 180,000 Btuh for NRC98-DV, 157,000 Btuh for NRC83-DV. Check the Power • The power supply required is 120VAC, at 60Hz.
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 À 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 There must be no area where an effective shield makes a 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 suf¿ - 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 ¿ lled before connecting the vent pipe. Filling the condensate trap before vent pipe installation. Prior to initial start up, make sure that you ¿ 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 ¿ 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 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...
Page 15: Vent Pipe Installation
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 29 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 two permanent openings to allow cir- culation of combustion air. 250mm (10") • Make each opening 199 square inches if they provide indoor air, and 100 square inches for 500mm (20") outdoor air.
Page 19 Outlet D: 25' (7.5m) (Use 30' (9m)), 25,000 Btuh requires 1/2" (25,000 Btuh) (65,000 Btuh) Section 3: 45' (13.5m) (Use 50' (15m)), 175,000 Btuh requires 1" Outlet E: 25' (7.5m) (Use 30' (9m)),180,000 Btuh requires 3/4" (NRC98-DV), Natural Gas 157,000 Btuh requires 3/4" (NRC83-DV) Meter **See next page for the pipe capacity charts.
Page 20 Gas Line Sizing for a Noritz Condensing Tankless Gas Water Heater Adapted from UPC 1997 Maximum Natural Gas 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 Z21.22, or The ANSI/ASME Boiler and Pressure Vessel Code, Section IV (Heating Boilers). This pressure relief valve must be capable of an hourly Btu rated temperature steam discharge of 180,000 Btuh(NRC98-DV), 157,000 Btuh(NRC83-DV). Multiple valves may be used. The pressure relief capacity must not exceed 150 psig. No valve shall be placed between the relief valve and the water heater.
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 other chemicals.
Page 23: Water Treatment
Water Treatment This water heater is equipped with an optional automatic service reminder function to alert the user when À ushing or a cartridge/¿ lter change is required. Once activated, the unit will display an "05" error code on the remote controller when maintenance is due. The service interval can be set for either 6, 12, or 24 months;...
Page 24 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. Dam- age 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 25: 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 ef¿ ciency, fully condensing appliance which produces acidic condensate during operation.
Page 26 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* Slope pipe downwards 1/2"...
Page 27: 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 28: Electrical Wiring
• The electrical supply required by the water heater is the gas piping. 120VAC at 60 Hz. The power consumption may be up to 291W (NRC98-DV), Tie the redundant power cord out- 277W (NRC83-DV) or higher if using optional accessories.
Page 29: Remote Controller
To keep the water heater off, let the unit sit for 30 sec. to return to the original display. • The NRC98-DV, NRC83-DV can be programmed so that it will default to one of three temperatures if the remote controller is removed (140, 130, 120 °F (60, 55, 50 °C)). To change the default tempera- ture, adjust the dip switches as described below.
Page 30 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 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 Periodically check the following to ensure proper operation of the water heater. • The venting system must be examined periodically by a quali¿ ed service technician to check for any leaks or corrosion. • The burner À ame must be checked periodically for a proper blue color and consistency. •...
Page 34 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 freez- ing, and bleed the gas out of the gas line.
Page 35 Dimensions < inch (mm)> 17.7" (450mm) 4-Ø0.5" (13mm) 6- 0.24" x 0.4" (6mm x 10mm) OBLONG HOLE 6.7" (170mm) 18.3" (464mm) 5.5" (140mm) 17.6" (448mm) 9.4" (240mm) 0.4" (10mm) 5.9" (150mm) 9.1" (232mm) 3.9" (100mm) 5.5" (140mm) Ø 4.5" (114mm) Ø...
Page 36 Remote Controller RC-7651M 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 37 Installation 1. Apply Wall Packing to the rear side of the 3. Remove the cover of the remote control, mark the location of the screw holes, and remote controller. drill holes for the wall anchors. 2. Connect the remote controller wires to the 4.

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Noritz ecoTOUGH NRC98-DV Installation Manual

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