Manuals / A.O. Smith / Household Appliance / Water Heater

A.O. Smith BFC - 30, BFC - 60 Water temperature protection, Gas valve, 4 Fan, Pressure switch

Models: BFC - 30 BFC - 60

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2.4.2Water temperature protection

The electronic controller uses temperatures sensors T1 (7) and T2 (13) to monitor three temperatures that are important for safety. The table explains the functioning of the temperature sensors.

Temperature protection

Protection

Description

 

 

Against frost

The frost protection cuts in. The water is heated to 20°C.

(T1 < 5°C or T2 < 5°C)

 

 

 

For maximum water temperature

The high-limit safeguard serves to prevent overheating and/or excessive

(T1 > 85°C or T2 > 85°C)

formation of scale in the appliance. If the high-limit safeguard is activated, the

 

heating is stopped. This causes the water in the tank to cool down. Once the

 

water has cooled sufficiently (T1 < 78°C), the electronic controller resets the

 

appliance.

 

 

For extra safety

A lockout error of the water heater controller takes place. The controller must

(T1 > 93°C or T2 > 93°C)

be manually reset before the appliance can resume operation (8.3 "Error

 

conditions"). The reset may only be performed if T1 <78°C.

2.4.3Gas valve

The electronic controller opens the gas valve so that gas can be supplied to the burner. As a safety measure, the gas valve has a double shut-off. The double shut-off guarantees complete isolation of the appliance from the gas supply.

To help ensure smooth ignition, the gas valve opens gradually ('softlite").

2.4.4Fan

The fan (18) provides an optimum air supply when there is a heat demand. As a safety feature, the fan ensures that any gases present in the combustion chamber are removed, both before and after combustion. We refer to this as pre- and post-purge.

The fan speed is continuously monitored by the electronic controller (4). The electronic controller takes control if the speed of rotation varies too much from the set value.

2.4.5Pressure switch

The pressure switch ensures the discharge of flue gases and the supply of incoming air during the pre-purge and normal running of the appliance. The default state of the pressure switch is open. When sufficient pressure difference is reached, the pressure switch closes. However, in the event of a fault, the pressure switch is tripped open, and the heating cycle is interrupted. The table shows the trip point per appliance.

Note

The trip point of the pressure switch is not adjustable.

Pressure switch trip points

Appliance

Closing pressure

Opening pressure differential

 

differential

 

 

 

 

BFC

> 635 Pa

< 605 Pa

28

 

 

 

 

 

BFC

> 855 Pa

< 825 Pa

30

 

 

 

 

 

BFC

> 885 Pa

< 855 Pa

50

 

 

 

 

 

BFC

> 1085 Pa

< 1055 Pa

60

 

 

Instruction manual BFC

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A.O. Smith BFC - 30, BFC - 60 Water temperature protection, Gas valve, 4 Fan, Pressure switch, Protection Description
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BFC - 30, BFC - 60 specifications

A.O. Smith is a well-regarded name in the water heating industry, known for producing innovative and efficient water heaters. Among their renowned products are the BFC - 60 and BFC - 30 models, which have gained popularity for their performance and reliability.

The A.O. Smith BFC - 60 and BFC - 30 are both designed to meet the diverse needs of residential and commercial users. The BFC - 60 has a capacity of 60 gallons, making it ideal for larger households or commercial settings where hot water demand is high. Meanwhile, the BFC - 30, with its 30-gallon capacity, caters to smaller households or establishments with lower hot water requirements.

One of the standout features of both models is their advanced heating technology. They are equipped with a high-efficiency burner system, which enhances the heating process while minimizing energy consumption. This means that users experience quicker recovery times and can enjoy a steady supply of hot water without the long wait associated with traditional heaters. The BFC series is designed to save energy, aligning with modern demands for sustainability.

Another significant characteristic of these models is their durable construction. Made with high-quality materials, including glass-lined tanks, they are built to resist corrosion and extend the lifespan of the water heater. This durability contributes to fewer maintenance requirements, giving users peace of mind.

In terms of safety, A.O. Smith has incorporated numerous features into the BFC series. Both models come with safety valves and thermostat controls to ensure that water is heated to appropriate temperatures, reducing the risk of scalding and malfunction. Additionally, their design allows for easy installation and maintenance, making them a user-friendly option.

Another aspect that distinguishes the BFC series is its compact design. Both models have a space-saving profile, making them suitable for installation in various locations, including tight utility rooms or basements. This flexibility allows homeowners and businesses to maximize their space without sacrificing performance.

Overall, the A.O. Smith BFC - 60 and BFC - 30 are exemplary water heating solutions that combine efficiency, durability, and safety. With their advanced features and technologies, they are an excellent choice for anyone in need of reliable hot water, ensuring comfort and satisfaction for years to come.