gis

9 Starting and running

9.1Introduction

Topics covered in this chapter, in sequence:

Starting and running.

The appliance's heating cycle.

9.2Starting and running

Start the appliance as follows:

1. Fill the appliance (5 "Filling").

2.Open (3.5 "Installation diagram") the manual gas valve.

3.Switch on the power to the appliance using the isolator between the appliance and the power supply.

4.Switch the electronic controller ON by setting the ON/OFF switch to position I.

a

»START OPERATION ^ CHANGE SETPOINT

ÈTset=65ÉC

6.Confirm the START OPERATION by pressing .

The appliance is now in "ON mode". If there is a heat demand, the appliance will run through the heating cycle (9.3 "The appliance's heating cycle").

If the heating cycle is not run, there is no heat demand; if this is the case, Tset will probably need to be set (11.3 "Setting the water temperature").

n

 

min

 

 

0063

O

I

 

IMD-0423 R0

The display will now show INTERNAL CHECK for about 10 seconds and go to the main menu.

a

INTERNAL CHECK

a

MENU »OFF ^ ON

ÈWEEK PROGRAM

5.Press the blue arrow once () to position the

cursor in front of ON and press . The display shown in the figure will appear.

9.3The appliance's heating cycle

The appliance's heating cycle is activated as soon as the measured water temperature (Tnet) falls below the threshold value (Tset). This threshold value depends on the currently selected appliance operating mode. For example, if the appliance is in "OFF mode" (frost protection), then this value is 5°C. If the appliance is in "ON mode", then this threshold value is selectable, for example, 65°C.

The heating cycle runs in turn through the following states:

1.HEAT DEMAND;

2.PRE-PURGE;

3.PRESSURE SWITCH;

4.PRE-GLOW;

5.IGNITION;

6.RUNNING;

7.POST-PURGE.

The complete cycle is explained in the following example, which assumes the appliance is in the basic mode ON.

Note

The same heating cycle applies to the other operating modes.

Instruction manual BFC

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A.O. Smith BFC - 80, BFC -100 service manual Starting and running Appliances heating cycle

BFC - 80, BFC -100 specifications

A.O. Smith is a renowned name in the water heater industry, and its BFC series, which includes the BFC-100 and BFC-80 models, exemplifies their commitment to innovation and efficiency. These units are designed to meet the demanding needs of both residential and commercial applications, providing reliable hot water solutions.

The A.O. Smith BFC-100 and BFC-80 are distinguished by their high capacity and robust design. The BFC-100 model boasts a capacity of 100 gallons, while the BFC-80 is ideal for those requiring 80 gallons. This makes them suitable for larger households or commercial establishments where hot water demand can be significant.

One of the primary features of these models is their advanced heating technology. Both units utilize a high-efficiency burner that ensures rapid heating and minimal energy consumption. This means users benefit from shorter wait times for hot water, reducing overall energy costs. The BFC series is also equipped with a special flame retention head that enhances combustion efficiency and prolongs the lifespan of the unit.

In terms of construction, the BFC-100 and BFC-80 models are built with high-quality materials that enhance durability and resistance to corrosion. The tanks are insulated with high-density foam, which improves energy retention and helps maintain water temperature for longer periods. This is crucial for conserving energy and minimizing heating costs.

Safety is a top priority for A.O. Smith, and the BFC series reflects this commitment. Each unit comes with a range of safety features, including a temperature and pressure relief valve that prevents overheating and excessive pressure buildup. Additionally, they are designed to meet strict industry standards, ensuring peace of mind for users.

Installation of both models is straightforward, with flexible venting options that accommodate various building layouts. Whether you are upgrading an existing water heating system or installing a new one, the BFC series is designed to integrate seamlessly.

In summary, the A.O. Smith BFC-100 and BFC-80 are excellent options for those seeking reliable, efficient, and durable water heating solutions. With their impressive capacity, advanced heating technology, robust construction, and safety features, these models stand out in the market and are sure to meet the hot water needs of any household or commercial space. Whether for residential use or in a business setting, A.O. Smith’s BFC series represents quality and innovation in hot water heating.