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Installation Manual
NORITZ AMERICA
CORPORATION
Canada
TANKLESS GAS WATER HEATER
N-0751M (Indoor/Outdoor Installation)
N-0751M-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 indicates an imminently hazardous situation which,
DANGER
if not avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation
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The following accessories are included with the unit. Check for any missing items before starting installation. 1. Included Accessories Part Shape Q’ty Part Shape Q’ty Cross Recessed Tapping Screw 3 5 Head Screw (N-0751M only) (N-0751M-OD only) Owner's Guide, Warranty, Remote Controller 1 Installation Manual 1 (See p. 21) each (this document) Remote Controller 1 Cord (3m(10')) The accessories listed below are not included with the units, but may be necessary 2. Optional Accessories for installat
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Quick Connect Multi System Installation 3. • The Quick Connect Multi System allows the installation of two units together utilizing only the Quick Connect Cord. The Quick Connect Cord is 2m (6'). long. Install the units 50 - 450mm (2-18") apart from each other to ensure the cord will be able to reach between the units. (See Typical Plumbing diagram). (If the distance between the two units is too great, not only will the cord not be able to reach, but the water temperature may also become unstab
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Before Installation 4. DANGER [For indoor installation only] 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 N-0751M Natural Gaz Naturel 199,900 BTU correct type of gas. 12,000 BTU 202 765 4.0 10.5" • Check that the gas supply line is sized for 0.65 2.55" 199,900 Btuh for this unit. 0 - 2,000 Ft. 0 - 2,000 Ft. (0 - 610 m) 2,000 - 4,500 Ft. 2,000 - 4,500 Ft.* (610 - 1,370 m 610 -
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Choosing Installation Site 5. * 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. DANGER [For indoor installation only] • Install the exhaust vent so that there are no obstacles around
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CAUTION • Consult with the customer concerning the location of installation. • Do not install the water heater where the exhaust will blow on outer walls or material not resistant to heat. Also consider the surrounding trees and animals. The heat and moisture from the water heater may cause discoloration of walls and resinous materials, or corrosion of aluminum materials. • Install in a location where the exhaust gas flow will not be affected by fans or range hoods. • Take care that noise and ex
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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. [ For N-0751M ] Item Check Illustration • Maintain the following clearance from both combustible and non-combustible 300mm (12") Indoor ma
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[ For N-0751M -OD] Item Check • Maintain the following clearance from both combustible 600mm (24") and non-combustible materials. (300mm (12")) *( ) indicates the distance when installing a heat insulat- or more ing board (incombustible material other than metal, with thickness of 2.5mm (0.1") or more) or "section of build- ing effectively finished with incombustible material." Note, however, that combustion failure may occur to the 10mm (0.4") unit as exhaust gas reflects from the wall. Provide
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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. Vent Terminal Area Where Terminal is Not Permitted Air Supply Inlet Indoor Installation Outdoor Installation Clearance (See p.10) (See p.10, 11) Above grade, veranda, porch, deck, A= 300mm (12") [300mm (12")] 300mm (12") [300mm (12")] or balcony 1.2m (4') below or to the side
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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. [ For N-0751M] Maintain the following clearances to any Illustration opening in any building: • 1.2m (4') below, 1.2m (4') horizontally from, or 0.3m (1') above any door, operable win- dow, or gravity air inlet into any building. 0.9m (3') above any forced air inlet within 3m (
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[ For N-0751M- OD] Maintain the following clearances to any Illustration opening in any building: • 0.3m (1') below, 0.3m (1') horizontally from, or 0.3m (1') above any door, operable window, or gravity air inlet into any building. 0.9m (3') above any forced air inlet within 3m (10'). 0.3m (1') 0.3m (1') 0.3m (1') 0.9m (3') • 0.3m (1') below, 0.3m (1') horizontally from, or 0.3m (1') above any door, operable window, or gravity air inlet into any building. 0.9m (3') above any forced air inlet
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7. 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. Be sure to do • Install the unit on a vertical wall and ensure that it is level. Item Check Illustration Location of Screw Hole CAUTION Mounting Bracket • Whe
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(Indoor Installation Only) Vent Pipe Installation 8. [ For N-0751M] 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 – latest edition, and in Canada, in accordance with NSCNGPI. • The first vertical run from the top of the heater Vent Piping should be no longer than 0.9m (3'). •Use only UL listed catego
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Horizontal Vent Termination • Terminate at least 300mm (12") above grade or above snow line. Hanger Straps • Terminate at least 2.1m (7') above a public Elbow walkway, 1.8m (6') from the combustion air intake of any appliance, and 0.9m (3') from Wall Termination Thimble any other building opening, gas utility meter, Slope vent Downwards service regulator etc. • Terminate at least 0.9m (3') above any **0.3m (1') Min. - forced air inlet within 3m (10'), 1.2m (4') be- 0.9m (3') Max. low, 1.2m (
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Supply combustion air to the units as per the National Fuel Gas Code, ANSI Z223.1 and Combustion Air in Canada, in accordance with NSCNGPIC. • Provide two permanent openings to allow circulation 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. • If the unit is installed in a mechanical closet, provide a 600mm (24") clearance in front of the unit to the door. • If combustion air will be provided thr
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Follow the instructions from the gas supplier. Gas Piping 9. The appliance and its individual shutoff valve must be disconnected from the gas supply piping system 1 during any pressure testing of that system at test pressures in excess of ⁄2 psi (3.5 kPa). The Appliance must be isolated from the gas supply piping system by closing its individual manual shutoff 1 valve during any pressure testing of the gas supply piping system at test pressures equal to or less than ⁄2 psi (3.5 kPa). The applia
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Gas Line Sizing for a Noritz Gas Water Heater Adapted from UPC 1997 Maximum Natur Natural Gas Delivery Capacity in Cubic Feet per Hour (0.60 Specific Gravity, 0.5" WC Pressure Drop) Length in Feet Pipe 3m (10') 6m (20') 9m (30') 12m (40') 15m (50') 18m (60') 21m (70') 24m (80') 27m (90') 30m (100') 37.5m (125') Size 1/2" 174 119 96 82 73 66 61 56 53 50 44 3/4" 363 249 200 171 152 138 127 118 111 104 93 1" 684 470 377 323 286 259 239 222 208 197 174 1 1/4" 1404 965 775 663 588 532 490 456 428 4
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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 10. Water Piping Gas Code 248 CMR Sections 2.00 and 5.00. Observe all applicable codes. This appliance suitable for potable water and space heating applications. Do not use this appliance if any part has been underwater. Immediately call a qualified service technician to
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11. Plumbing Applications Recirculation System Aquastat Wiring Hot Water Return Cold Water Supply Use Honeywell Aquastat (Model L6006A or L6006C) Fixtures Check Valve 105 Pump Expansion Tank (Relay for (Install According Pump to Local Codes) NORITZ > 85 W) Gas Water (See p. 23) Pump Control Signal R Heater (See p. 23) AC120 Check Valve B 5 Pump Aquastat (See notes for Sizing) W (Use Aquastat if Unit Isn't Pressure Shutoff Valve Controlling Pump) Relief Optional 30 - 38L Valve (8-10 Gal.) Neu
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Consult a qualified electrician Electrical Wiring for the electrical work. 12. 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. Wiring errors can cause impr
