Install Instructions

ManualsBrandsNoritz ManualsPlumbing SuppliesNC1991 199,900 BTU Outdoor Commercial Tankless Water Heater (NG)

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.

Prohibited

Disconnect

Power

Ground

Be sure to do

WARNING:

If the information in this manual is not followed exactly, a re or explosion may result

causing property damage, personal injury or death.

NORITZ AMERICA

CORPORATION

Installation Manual

TANKLESS GAS WATER HEATER

NC1991-OD

(Outdoor Installation)

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.

DANGER

WARNING

CAUTION

SBA8872-2

Rev. 03/13

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 ll in all of the required

items on the warranty and to hand the warranty to the customer along with the Owner's Guide.

CAUTION

FOR USE IN COMMERCIAL APPLICATIONS.

nstallation 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

designs and/or specications of its products without notice.

*ENERGY STAR

applies when used in a combination potable

water heating and space heating system.

CERTIFIED

*SBA8872*

Low NOx

Approved by

SCAQMD

14 ng/J or 20 ppm

(Natural Gas Only)

Summary of content (30 pages)

PAGE 1
Installation Manual NORITZ AMERICA CORPORATION TANKLESS GAS WATER HEATER NC1991-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 WARNING CAUTION DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
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1. Included Accessories Part Shape Q’ty Part Anchoring Screw 5 Owner's Guide, Warranty, Installation Manual (this document) 1 each Remote Controller (See p. 16) 1 Remote Controller Cord (6ft (2m)) 1 2. Optional Accessories Part Remote Controller Cord (26ft (8m)) Isolation Valves (includes pressure relief valve) System Controller (SC-301-6M-EXT) 2 The following accessories are included with the unit. Check for any missing items before starting installation.
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. 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).
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. 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 fire or electric shock. Use Extreme Caution if Using With a Solar Pre-Heater • Using this unit with a solar pre-heater can lead to unpredictable output temperatures and possibly scalding.
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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 • Avoid installation in places where dust or debris will accumulate. Dust may block the air-supply opening, causing the performance of the device fan to drop and incomplete combustion to occur as a result.
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. 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.
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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.
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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.
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8. 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).
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Gas Line Sizing for a Noritz 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 Size 1/2" 3/4" 1" 1 1/4" 1 1/2" 2" 2 1/2" 3" 3 1/2" 4" 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.
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9. 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.
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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.
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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. Damage 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 14
10. Plumbing Applications Recirculation System NORITZ 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.
PAGE 15
11. 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.
PAGE 16
Remote Controller • Applicable Model Noritz Tankless Gas Water Heater RC-9018M Remote controller Install the remote controller according to the instructions in the Installation Guide. (p. 28). * Only one remote controller can be connected to the water heater. A malfunction may occur if two or more remote controllers are connected. • This unit can be programmed so that it will default to one of four temperatures if the remote controller is removed [185°F (85°C), 140°F (60°C), 135°F (57°C), 120°F (50°C)].
PAGE 17
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.
PAGE 18
Changing Other Features Adjusting the Temperature / Water Quantity Display Note: The setting must be done within the first 10 minutes of connecting electrical power to the water heater. Table of Setting Items Item Choices (factory defaults shaded) Celsius/Fahrenheit display mode. °F (Fahrenheit) / gal °C (Celsius) / L Remote Controller Power On/Off Button Display MENU Button ▲/▼ Buttons ENTER Buttton Setting Procedure 1.
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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.
PAGE 20
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.
PAGE 21
12. 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.
PAGE 22
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.
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14. Dimensions 13.2" (336mm) 9.4" (240mm) 0.4" (10mm) 1.1" (28mm) 2.4" (61mm) 3.4" (88mm) 0.4" (10mm) FLUE COLLAR 1.7" (42mm) 1.6" (41mm) 22.3" (567mm) 3.3" (85mm) 2.0" (50mm) 13.8" (350mm) 13.1" (334mm) 9.9" (252mm) 23.6" (600mm) 0.4" (10mm) 4.7" (120mm) 24.5" (622mm) 4-Ø0.5" (Ø13mm) 2-0.3x0.5" (6.5x13mm) OBLONG HOLE < inch (mm) > AIR INLET 0.4" (10mm) AIR INLET 0.4" (10mm) 2.4" (60mm) 3.3" (84mm) 4.7" (120mm) WIRING THROUGHWAY 3-0.3x0.6" (6.5x16.
PAGE 24
15. Multi-System Install one system controller (SC-301-6M(-EXT)) 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 25
Hot Water Supply Hot Water Supply Pipe (1 1/4"-2") Unit 6 Expansion Tank System Controller Remote Controller Hot Water Return Line (3/4"-1 1/4") Unit 1 Circulation Pump 1 Circulation Pump 2 (If Necessary) G allow for maximum flow rates of the units. * Size the cold water supply piping to Cold Water Supply Pipe (1 1/4"-2") Gas Pipe (See SC-301-6M Installation Manual) in system settings.
PAGE 26
Unit 6 26 (1 1/4"-2") Unit 1 G Gas Pipe Set “Yes” for the question “Start pump rotation?” in system settings. (See SCU-301-12M Installation Manual) Hot Water Storage Tank (Copper or Stainless Pipe) Hot water return line Return line circulation pump (Copper or Stainless Pipe) Hot water supply line Relief Valve * Size the cold water supply piping to allow for maximum flow rates of the building.
PAGE 27
Multi-System Wiring (Use SC-301-6M (-EXT)) * Connect these to the remote control terminal block in each unit No.6 Unit 1 System Controller No.5 No.4 No.3 PCB No.2 90 90 89 B5 B5 102 Power PCB 90 Remote control terminal block Remote Controller Cord 90 Remote Controller Unit 2 PCB Remote Control terminal block * The remote controller terminal location may differ depending on the unit.
PAGE 28
Remote Controller RC-9018M Requests to Installers ● In order to use the water heater safely, read this installation guide 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. ● Refer to the Installation Manual provided with the water heater for complete installation details.
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Included Parts List Remote Controller (1) (The value in ( ) indicates the quantity.) Mounting bracket (1) Round countersunk head wood screw Wall anchor (2) Raised countersunk head screw (2) (2) Machine screw (2) (For junction box installation) Notes on the Installation Location • The remote should be installed in an easily accessible location. • Avoid installing in a place where water or steam can come into contact with the controller. • Avoid locations where special chemical agents (e.g.
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2. Remove the decorative frame from the remote controller. (The remote controller is inserted in the decorative frame.) Main remote controller body Remove the remote controller while pulling the decorative frame forward. Decorative frame 3. Connect the remote controller wires to the cord supplied with the water heater. * Do not remove the remote controller wires from the terminal block, connect these wires to the remote controller cord. * Do not remove the insulating cover (clear).