Reliance Water Heaters N85390NE, N71120NE Installation Requirements, Gas pressure requirements

Page 12

Installation Requirements

Gas pressure requirements

All models require a minimum gas supply pressure of 5.2” W.C. The minimum supply pressure is measured while gas is not flowing (static pressure) AND while gas is flowing (dynamic pressure). The supply pressure (static and dynamic) should never fall below 5.2” W.C. The supply pressure should be measured with all gas fired appliances connected to the common main firing at full capacity. If the supply pressure drops more than 1.5” W.C. as gas begins to flow to the water heater then the supply gas system including the gas line and/ or the gas regulator may be restricted or undersized. See Supply Gas Regulator section and Gas Piping section of this manual. The low gas pressure switch will shut down the water heater if the supply gas pressure drops below the minimum allowable value.

The gas valve on all models has a maximum gas supply pressure limit of 14" W.C. If a supply gas regulator is installed on the gas supply line, the maximum recommended pressure for the regulated gas supply is 11" W.C. The maximum supply pressure is measured while gas is not flowing (static pressure) AND while gas is flowing (dynamic pressure).

Supply Gas Regulator

The water heater covered by this manual may require the installation of a supply gas regulator. If the supply gas pressure exceeds 14 inches W.C. a supply gas regulator must be used. If the gas supply pressure exceeds 14" W.C. in a multiple water heater installation, each water heater must have its own supply gas regulator. If required, the supply gas regulator shall be rated at or above the Btu/hr input rating of the water heater it supplies. If a supply gas regulator is installed on the gas supply line, the maximum recommended pressure for the regulated gas supply is 11" W.C.

Supply gas regulators shall have inlet and outlet connections not less than the minimum supply gas line size for the water heater they serve as shown in Table 9. The Maxitrol 325-7L or equivalent is recommended.

Power Supply

The water heaters covered in this manual require a 120 VAC, 1Ø (single phase), 60Hz, 15 amp power supply and must also be electrically grounded in accordance with local codes or, in the absence of local codes, with the National Electrical Code, ANSI/NFPA 70 or the Canadian Electrical Code, CSA C22.1.

WATER TEMPERATURE CONTROL AND Mixing Valves

Water temperature over 125°F (52°C) can cause severe burns instantly resulting in severe injury or death.

Children, the elderly and the physically or mentally disabled are at highest risk for scald injury.

Feel water before bathing or showering.

Temperature limiting devices such as mixing valves must be installed when required by codes and to ensure safe temperatures at fixtures.

Water heated to a temperature which will satisfy clothes washing, dish washing, and other sanitizing needs can scald and cause permanent injury upon contact. Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the water heater’s temperature setting by up to 20°F (11°C).

Some people are more likely to be permanently injured by hot water than others. These include the elderly, children, the infirm and the physically/mentally disabled. Table 6 shows the approximate time-to-burn relationship for normal adult skin. If anyone using hot water provided by the water heater being installed fits into one of these groups or if there is a local code or state law requiring a certain water temperature at the point of use, then special precautions must be taken.

In addition to using the lowest possible temperature setting that satisfies the demand of the application a Mixing Valve should be installed at the water heater (see Figure 10) or at the hot water taps to further reduce system water temperature.

Mixing valves are available at plumbing supply stores. Consult a Qualified Installer or Service Agency. Follow mixing valve manufacturer’s instructions for installation of the valves.

Table 6.

Water Temperature

Time to Produce 2nd & 3rd

Degree Burns on Adult Skin

 

180°F (82°C)

Nearly instantaneous

170°F (77°C)

Nearly instantaneous

160°F (71°C)

About 1/2 second

150°F (66°C)

About 1-1/2 seconds

140°F (60°C)

Less than 5 seconds

130°F (54°C)

About 30 seconds

120°F (49°C)

More than 5 minutes

12

Image 12
Contents Installation Operation Service Commercial gas water heatersTable Of Contents Safe Installation, Use and Service ApprovalsGeneral Safety Information Fire and Explosion HazardPrecautions Grounding InstructionsHydrogen Gas Flammable Qualified Installer or Service Agency IntroductionAbbreviations Used QualificationsHydro Cannon self-cleaning system High limit switchLow Gas Pressure Switch Electronic ignition controlInstallation considerations Rough In DimensionsROUGH-IN-DIMENSIONS Recovery CAPACITIES, based on 80% efficiencyLocating the water heater ClearancesInstallation on combustible flooring Insulation BlanketHard Water Circulation pumpsHigh Altitude Installations Installation Requirements Power SupplyWater Temperature Control and Mixing Valves Gas pressure requirementsTemperature-pressure relief valve Dishwashing MachinesClosed Water Systems Thermal ExpansionContaminated Air Air requirementsValve Discharge Pipe Requirements Unconfined Space Confined SpaceVenting Multiple heater manifold Fresh Air Openings For Confined SpacesOutdoor Air Through Two Openings Outdoor Air Through One OpeningOutdoor Air Through Two Vertical Ducts Air From Other Indoor SpacesType B GAS Vent Multiple Gas Fired Tank-Type HeatersTechnical Data Venting Water heater installation Water Line ConnectionsValve Discharge Pipe Tube Inlet Installation Heater wiring GAS Piping GAS Supply Pipe Lengths in FeetPurging GAS Pressure RegulatorAdjustments GeneralFilling Lighting & Operation Label Check the Igniter Assembly Igniter AssemblyChecking Venting Main BurnerChecking the Input MAINTENANCE Remote storage tank temperature controlTemperature-Pressure relief Valve test Venting systemAnode rod inspection Draining and flushingTo Drain the Water Heater Storage Tank To Flush the Water Heater Storage TankTank Cleanout Procedure Deliming Using FLO-JUG MethodDeliming solvents System diagnostics Ignition module systemHigh Water Temperature Shut OFF System For Your InformationElectrical Servicing Start up conditionsSequence of Operation Flow Chart Operational checklist Complaint Cause Remedy User Service AgentDiagrams Water PipingTemperature & Pressure Temperature & Pressure Relief Valve Circulating Pump Multi Flue 2 Units Multi Flue 2 Units with Vertical Storage Tank Multi Flue 2 Units with Vertical Storage Tank Return from Multi Flue 2 Units TWO Temperature Multi Flue 2 Units with Booster TWO Temperature MULTI-FLUE 3 Units MULTI-FLUE 3 Units with Vertical Storage Tank MULTI-FLUE 3 Units with Horizontal Storage Tank Multi Flue Flue 4 Units MULTI-FLUE 4 Units with Vertical Storage Tank MULTI-FLUE 4 Units with Horizontal Storage Tank Manifold Kits Page Page Page Page Limited Warranty Tennessee Waltz Parkway, Ashland City, TN Tech Support Parts

N71120NE, N85390NE specifications

Reliance Water Heaters has established itself as a trusted name in the water heating industry, consistently delivering high-quality products that meet the diverse needs of consumers. Among their offerings, the Reliance N71120NE and N85390NE models stand out due to their advanced features and innovative technologies.

The Reliance N71120NE is known for its efficient heating capabilities, boasting a 40-gallon capacity that is ideal for medium-sized households. This model features a durable glass-lined tank that provides exceptional resistance to rust and corrosion, ensuring longevity and durability. One of its standout characteristics is the built-in energy-saving mode, which optimizes energy consumption without compromising performance. This unit operates on electricity, making it a versatile option for various settings. Additionally, the N71120NE is designed with a temperature control thermostat, allowing users to set and maintain their desired water temperature with ease.

On the other hand, the Reliance N85390NE model offers a larger capacity of 50 gallons, making it suitable for larger families or homes with increased hot water demands. Similar to the N71120NE, this model comes with a glass-lined tank for superior protection against corrosion. One of the advanced technologies featured in the N85390NE is the High-Quality Insulation System, which minimizes heat loss and maintains water temperature efficiently. This model also includes a self-diagnostics system, providing users with real-time updates on performance and maintenance needs. The innovative anode rod in this unit extends the lifespan of the tank by sacrificially corroding instead of the tank itself.

Both models are designed with safety in mind, featuring a pressure relief valve that prevents pressure buildup, making them safe for residential use. Moreover, each unit adheres to the latest energy efficiency standards, contributing to reduced utility bills and a smaller carbon footprint.

Reliance Water Heaters emphasizes user-friendly installation and maintenance, making it easy for homeowners to enjoy the benefits of these advanced water heaters. Overall, the Reliance N71120NE and N85390NE models represent excellence in water heating technology, offering efficient, reliable, and user-friendly solutions for modern households. Choosing either of these models ensures that users can enjoy hot water on demand while benefiting from enhanced efficiency and durability.