Noritz NRC98-OD Installation Manual
Condensing tankless gas water heater
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- Installation manual (30 pages) ,
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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
If the information in this manual is not followed exactly, a fire or explosion may result
WARNING:
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 in-
stallation 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 fill 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
SBA8677-2
Rev. 03/13
NRC98-OD
NRC83-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
CAUTION
FOR USE IN RESIDENTIAL 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).
Noritz America reserves the right to discontinue, or change at any time, the
Low NOx
designs and/or specifications of its products without notice.
Approved by
SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)
(Outdoor Installation)
Ground
NORITZ AMERICA
CORPORATION
Be sure to do
*SBA8677*
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Table of Contents
Related Manuals for Noritz NRC98-OD
Summary of Contents for Noritz NRC98-OD
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Page 1: Installation Manual
National Fuel Gas Code, ANSI Z223.1/NFPA 54- latest edition and/or CSA B149.1, CERTIFIED Natural Gas and Propane Installation Code (NSCNGPIC). Noritz America reserves the right to discontinue, or change at any time, the Low NOx designs and/or specifications of its products without notice. -
Page 2: Optional Accessories
The following accessories are included with the unit. Included Accessories Check for any missing items before starting installation. Shape Shape Part Q’ty Part Q’ty Owner's Guide, Warranty, Cross Recessed Installation Manual Head Screw each (this document) Remote Controller Remote Controller (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
• 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-OD, 157,000 Btuh for NRC83-OD. Check the Power • The power supply required is 120VAC, at 60Hz. - Page 5 WARNING • Avoid places where fires 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. Using the incorrect voltage may result in fire or cracking. Prohibited •...
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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 Canadian Non-Direct Vent US Non-Direct Vent...
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Page 8: Installation
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 9: Gas Piping
Outlet D: 25' (7.5m) (Use 30' (9m)), 25,000 Btuh requires 1/2" Section 3: 45' (13.5m) (Use 50' (15m)), 175,000 Btuh requires 1" Natural Gas Outlet E: 25' (7.5m) (Use 30' (9m)),180,000 Btuh requires 3/4" (NRC98-OD), Meter **See next page for the pipe capacity charts. - Page 10 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) Pipe Length in Feet 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 11: Water Piping
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-OD), 157,000 Btuh(NRC83-OD). 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 12 • Expansion water may drop from the pressure this is not done, local boiling will occur inside relief valve and wet the floor. the water heater causing abnormal sounds and If necessary, provide drain piping or use a drain decreasing the durability of the heat exchanger. hose to remove the water. Freeze Prevention • Freezing is prevented within the device automatically unless the outside temperature without wind is below -4°F (-20°C) for NRC98-OD, NRC83-OD. • If this model is installed in an area where the outside temperature can approach freezing conditions of -4°F (-20°C) or below for NRC98-OD, NRC83-OD, then additional freeze protection measures must be used. For temporary freeze protection measures, refer to the Owner's Guide. • The freeze prevention heaters will not prevent the plumbing external to the unit from freezing. Protect this plumbing with insulation, heat tape or electric heaters, solenoids, or pipe covers. • In order for the freeze prevention heaters to operate, the water heater must have power at all times.
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Page 13: Water Treatment
Water Treatment This water heater is equipped with an optional automatic service reminder function to alert the user * Do not change any other dipswitches. * Do not change any other dipswitches. when flushing or a cartridge/filter 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 14 Hard (> 239 mg/L) Required * Install Noritz Isolation Valves to allow for flushing. * Install Noritz Isolation Valves to allow for flushing. ** Flushing is required if a water treatment device is not installed. ** Flushing is required if a water treatment device is not installed.
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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 efficiency, fully condensing appliance which produces acidic condensate during operation. The water heater incorporates a collection and removal system which must be prop- erly drained in order to ensure proper operation of this appliance. • The pH level of the condensate is approximately 2-3. An external neutralizer must be installed on the drain piping prior to disposal when required by local code or when the condensate could cause damage. - 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 ANY VALVES DO NOT ADD ANY VALVES 1/2" PVC pipe 1/2" PVC pipe Slope pipe downwards 3/8"...
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Page 17: Plumbing Applications
Set the Aquastat to 10°F (5°C) below the set Expansion Tank output temperature. (Install according Isolation 4. Noritz recommends the use of an Isolation Kit with to local code) Kit(*4) the installation. These kits include an integrated shut-off and service valve with unions and a pressure relief valve. -
Page 18: Electrical Wiring
Do not turn power on until electrical wiring is finished. Disconnect power before servicing. Failure to do so may result in death or serious injury from electrical shock. • Do not let the power cord contact • The electrical supply required by the water heater is the gas piping. 120VAC at 60 Hz. The power consumption may be up to 271W (NRC98-OD), Tie the redundant power cord out- 257W (NRC83-OD) or higher if using optional accessories. side the water heater. Putting the Use an appropriate circuit. redundant length of cord inside the • Do not disconnect the power supply when not in use. When... -
Page 19: Remote Controller
Remote Controller • Applicable Model Noritz Condensing Tankless Gas Water Heater * Remarks [125 °F / 55 °C] Celsius display mode RC-7651M Remote controller Fahrenheit display mode Install the remote controller according to the instructions in the Installation Guide (p. 26). * 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]. To access higher temperature settings through the remote controller, follow the below steps. -
Page 20: Connecting Remote Controller Cord To Unit
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. Power tools may cause damage to the terminal block. Remote controller cord • For extensions, a 26' (8m) cord can be purchased (Part # RC-CORD26) or use 18AWG wire. • Install according to the National Electrical Code and all applicable local codes. 1. Check to make sure that the remote controller cord has plenty of slack in order to reach the ex- ternal connection terminal block. -
Page 21: 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. Wire Tag 2. Remove the front cover of the heater (4 screws). 3. Cut off the connector at the end of the pump con- Crimping Terminal trol wires. 4. Wire the pump control wires through the wiring throughway and connect them to the wiring inside the pump (this will be the power supply for the pump, do not also connect 120VAC to the pump). Wiring If a large pump is being used (greater than 85W) use Supplies Power for Throughway... -
Page 22: 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 1.Red * The remote controller can be connected to 2.Black 2.Black 2.Green 2.Black either unit A or B. Do not connect a remote 3.White 3.White 3.Red 3.White 4.Green 4.Green 4.Black 4.Green... -
Page 23: Maintenance
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. •... -
Page 24: 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 freez- ing, 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. Lighting Instructions This water heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner. Do not try to light the burner by hand. 1. Read the safety information in the installation manual or on the front of the water heater. 2. Turn off all electrical power to the unit. 3. Do not attempt to light the burner by hand. 4. Turn the gas control manual valve (external to the unit) clockwise to the off position. 5. Wait five minutes to clear out any gas. If the smell of gas remains, stop, and follow the instruc- tions on page 3 of Owner's Guide. - Page 25 Dimensions 17.7" (450mm) < mm [inch] > 4- Ø0.5"(Ø13mm) 6- 0.24" x 0.4" (6 x10mm) OBLONG HOLE 6.7" (170mm) 18.3" (464mm) 5.5" (140mm) 9.4" (240mm) 17.6" (448mm) 0.4" (10mm) 0.5" (13mm) 3.9" (100mm) 10.5" (267mm) 3.9" (99mm) 1.1" (28mm) 2.8" (70mm) 1.4"...
- Page 26 For Installers: Read this installation guide Remote Controller RC-7651M carefully before carrying out installation. Installation Guide NORI T Z AMERI C A CORPORATI O N 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 27 Installation 3. Remove the cover of the remote control, 1. Apply Wall Packing to the rear side of the 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.
- Page 28 Installing the Remote Controller Outdoor Junction Box 5. Slide the box nut over the remote controller 1. Insert the remote controller wires through the wires and screw it onto the wall pipe. wall pipe and secure the wall pipe to the re- mote controller.