Rheem Gas Heavy Duty Water Heater Models 265 Litre and 275 Litre HOW Your Water Heater Works

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HOW YOUR WATER HEATER WORKS

Water is stored in a vitreous enamel lined steel cylinder and heated by a gas burner located under the cylinder. The heat produced by the burner is transferred to the water through the base of the cylinder and through the wall of a flue pipe which passes through the centre of the cylinder. A flue baffle in this flue ensures the efficiency of the water heater is correct. The gas supply to the burner is controlled by the thermostat so the water is heated to a constant temperature. Automatic safety controls are fitted to the water heater to provide safe and efficient operation.

MAINS PRESSURE

The water heater is designed to operate at mains pressure by connecting directly to the mains water supply. If the mains supply pressure in your area exceeds that shown on page 18, a pressure limiting valve must be fitted. The supply pressure should be greater than 350 kPa for true mains pressure operation to be achieved.

ELECTRONIC THERMOSTAT

The thermostat automatically operates the gas control by switching its power on and off, so a constant temperature is maintained. The thermostat is mounted externally on the water heater and the protective over temperature cut out is mounted inside the lower front cover of the water heater.

There is no need to switch the water heater off when it is not in use. The thermostat is fully automatic and only allows the gas control to open when the burner requires gas for heating. The thermostat may flash “AH” (alarm high) and the current water temperature, or “AL” (alarm low) and the current water temperature. This is not a cause for concern unless the temperature displayed is more than 10ºC above the set temperature. Refer to “Diagnostic Features of Electronic Thermostat” on page 12. To adjust the thermostat settings refer to “Temperature Control” on page 43.

HOT SURFACE IGNITION

The water heater incorporates an automatic burner ignition system. A hot surface igniter (HSI) probe automatically heats up when the thermostat registers heating of the water is required. When the HSI probe is fully energised, the gas valve opens allowing gas to the burner which in turn is ignited by the HSI probe.

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Contents Owners Guide Installation Instructions Patents Contents Temperature Adjustment About Your Water HeaterModel Type Hotter Water Increases the Risk of Scald InjurySafety To Turn OFF the Water Heater To Turn on the Water HeaterAnode Protection Does the Water Quality Affect the Water HEATER?HOW Long will the Water Heater LAST? HOW Your Water Heater Works Mains PressureElectronic Thermostat HOT Surface IgnitionExpansion Control Valve Temperature Pressure Relief ValveRegular Care Servicing Save a Service Call Not Enough HOT Water or no HOT WaterBurner will not Light Diagnostic Features of Electronic ThermostatWater Heater not Operating Temperature Pressure Relief Valve Running Expansion Control Valve RunningWater Heater Appears to be Leaking High GAS BillsWater Heater Location InstallationThis Water Heater is not Suitable for Pool Heating Indoor Installation Safe TrayOutdoor Installation HOT Water Delivery Mains Water SupplyTank Water Supply Temperature Limiting Device Circulated HOT Water Flow and Return SystemReducing Heat Losses Anode TypesSaddling Pipe Work Typical Installation Outdoor Location Typical Installation Indoor Location Dimensions and Technical Data Model No 621265 631265 621275 631275Water Inlet and Outlet Connections PlumbingConnection Sizes Relief Valve GAS InletPipe Sizes Relief Valve Drain Thermostat Setting Connections ElectricalWiring a Power Flued System to the Water Heater Power Flue External Controls Intermittent Operation Power Flue External Controls 24 Hour Operation Multiple Installations Multiple Installations Typical Installation Rheem Heavy Duty GAS Water Heaters Installation Dimensions Rheem Heavy Duty GAS Water Heaters Line Manifold Back to Back ManifoldManifold Arrangement Commissioning To Fill and Turn on the Water HeaterGAS Inlet Pressure Lighting the Water Heater For Your Safety Read Before LightingLighting Procedure Test the Water Heater After Installation Flashes FaultBurner Pressure Adjustment AIR AdjustmentDraining the Water Heater Temperature Control Recirculation SystemThermostat Adjustment This page is intentionally blank Saturation Index Water SuppliesAnode Warranty Conditions Warranty ExclusionsWarranty Rheem will

Gas Heavy Duty Water Heater Models 265 Litre and 275 Litre specifications

Rheem offers a comprehensive range of gas water heaters, with the 265-litre and 275-litre heavy-duty models standing out for their efficiency, durability, and advanced technology. These models are designed specifically for households and commercial applications that require a reliable supply of hot water, ensuring comfort and convenience.

The Rheem 265-litre model is built to cater to larger households, providing ample hot water to meet daily needs. It features a powerful gas burner that delivers quick heating, allowing users to enjoy hot water almost immediately. With an impressive first-hour rating, the 265-litre unit can effortlessly supply enough hot water for multiple simultaneous uses, such as showers, washing dishes, and laundry.

Similarly, the 275-litre model offers an even greater capacity, making it ideal for larger families or commercial settings. It boasts enhanced heating capabilities and a larger burner size, which significantly reduces recovery time and ensures a consistent supply of hot water throughout the day. This model is particularly beneficial for businesses in the hospitality industry, where demand for hot water is high.

Both models utilize Rheem's proprietary technologies to maximize efficiency. They feature premium insulation that minimizes heat loss, allowing the heaters to maintain optimal water temperatures while consuming less energy. The intuitive electronic gas control system ensures precise temperature management, promoting safety and comfort.

Durability is a hallmark of Rheem water heaters, with both the 265-litre and 275-litre models constructed from high-quality materials designed to withstand the rigors of daily use. The tanks are coated with advanced corrosion-resistant materials, extending their lifespan and reducing the likelihood of maintenance issues. Additionally, both models are equipped with anode rods that further protect against corrosion.

Installation and maintenance are further simplified with Rheem's user-friendly design. The compact build allows for flexibility in installation, whether indoors or outdoors, and the easy access to service points ensures that routine maintenance can be performed without hassle.

In summary, Rheem's Gas Heavy Duty Water Heater Models 265-litre and 275-litre combine advanced technology, durability, and efficiency to deliver exceptional performance. These models are perfect for those requiring a reliable and consistent supply of hot water, making them an excellent choice for both residential and commercial use.
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