A.O. Smith EQ 155 G, EQ 115 G, EQH 200 G manual Technical safety equipment, Gas control valve

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1.2Technical safety equipment

1.2.1 Gas control valve

The water heater has been fitted with a gas control block consisting of a thermo-electrical pilot flame safeguard, pilot flame pressure regulator, burner pressure regulator, a control thermostat (adjustable between 30°C and 71°C) and a safety thermostat (82°C). This gas control block with its simple and secure control respectively switches the gas supply to the main burner on or off.

This gas control block is suitable for gasses from the first, second and third gas family. The maximum inlet pressure is 50 mbar.

1.2.2 Flue down draught safety device

The appliance must be fitted with a flue down draught safety device. The operation of the safeguard is based on the principle of the Thermal Reflux Safeguard (T.R.S.).

The appliance has been fitted with a T.R.S., see Figure 2.

This T.R.S. can be recognized by the brass colored helix coil which is connected to the lower edge of the draught diverter. The helix coil has been connected to the thermostat by means of a capillary tube. The wiring that is connected to the thermostat must be connected to the thermocouple.

It is the aim of the T.R.S. to prevent flue gasses from the water heater entering the room where the water heater has been placed, instead of passing through the flue to outside atmosphere. The thermo-couple circuit is interrupted and the gas supply is disconnected as soon as the T.R.S. is activated by heating of the sensor by the hot gasses.

After the cause of the reentry of flue gasses has been traced the device can be put back into operation again. In case of T.R.S. the RESET button has to be pressed first.

If this failure occurs frequently, this indicates that the flue suffers from down draught conditions. We advice that necessary remedial actions be carried out by a competent person.

Important

The T.R.S. should never be put out of operation. Reentry of flue gasses to the building could be harmful and cause poisoning or death.

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Contents INSTALLATION- and User Instructions Page Contents Description ApplianceAOS Technical safety equipment Flue down draught safety deviceGas control valve AOS Dimensions Technical descriptionDimensions Technical data Device category II2H3+Installation instructions InstallationWater connections AOS Gas connection Flue systemCommissioning Filling the water heaterPutting into operation Pilot adjustment Putting out of operationRemoving and replacing the inner door Temperature regulation Setting the pilotSetting the nominal heat input Converting to another type of gasDescription Unit G20 G30 G31 Maintenance Sacrificial anodeInspection of the internal waterside surfaces CleaningInlet combination Spare partsCondensation Fault findingGas smell Important warningCommissioning 3 UsePutting out of operation Maintenance Fault finding Fault Possible causeFault Possible cause Conditions for installation and use Guarantee in generalGuarantee of the tank Range of guaranteeAny other dealer or stockist of the warrantors products Page Page Page Page 0307 985 R1

EQH 200 G, EQ 115 G, EQ 155 G specifications

A.O. Smith, a reputable name in the water heating industry, has designed premium water heaters that cater to various needs, including the EQ 155 G, EQ 115 G, and EQH 200 G models. These units emphasize efficiency, reliability, and advanced technology to provide users with optimal hot water solutions.

The A.O. Smith EQ 155 G is a gas water heater that boasts a 155-gallon capacity. Designed for high-demand households, it features an impressive recovery rate, allowing it to deliver hot water quickly. One of the standout features is its Energy Factor rating, which ensures energy efficiency and reduced operating costs. The EQ 155 G is also equipped with a durable enamel-coated tank that resists corrosion, ensuring longevity.

Similarly, the EQ 115 G model offers a slightly smaller capacity of 115 gallons, making it an excellent choice for medium-sized households. This gas-powered heater incorporates cutting-edge technology to maximize heat retention and minimize water heating costs. With features such as a patented Venturi mixing system, it provides uniform hot water distribution while minimizing energy wastage. Its slim design also allows for easy installation in tight spaces.

On the other hand, the EQH 200 G is a hybrid model that combines the benefits of both gas and heat pump technology. With a capacity of 200 gallons, it is designed for large families or commercial applications. The EQH 200 G utilizes advanced heat pump technology for energy-efficient heating, making it one of the most efficient options on the market. This model is particularly suitable for users looking to reduce their carbon footprint while enjoying consistent hot water supply.

All three models come equipped with user-friendly digital displays, allowing for easy temperature adjustments and monitoring. Moreover, these units feature robust safety mechanisms, including leak detection and temperature controls, to ensure user safety.

In summary, the A.O. Smith EQ 155 G, EQ 115 G, and EQH 200 G are innovative water heating solutions tailored to meet diverse requirements. With advanced technologies, high energy efficiency, and durability, these models exemplify A.O. Smith's commitment to quality and customer satisfaction in the water heating industry.
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