The heat sensing switch performs as the furnace high temperature limit switch. If the furnace overheats for any reason, the limit switch opens, breaking the circuit to the burner. The blower motor will be energized and as the unit cools the limit switch will close. This relights the burner, however, unless the overheating condition is corrected, the furnace will continue to cycle on limit.

This unit is equipped with an interrupted ignition elec- tronic control. If the main burner does not ignite within 30 sec from the call for heat, the control will lock out. The red button on top of the control must be depressed for 3 sec in order to reset the control. The control CAN- NOT be reset from the room thermostat.

1.This appliance is equipped with an ignition device which automatically lights the burner. Do NOT try to light the burner by hand.

2.After preparing the furnace for heating operation (See previous section.) and checking for proper oil supply, proceed as follows.

3.For a heating/cooling system, set the thermostat to HEAT and the fan to AUTO. Set the thermostat to the desired room temperature and turn on the electrical power to the furnace.

4.The burner should light and the system should be controlled by the thermostat.

HEATING

Preparing Furnace For Operation

Before attempting to put your furnace into operation for the heating season, you should perform the following procedures.

!WARNING

If you do not follow these instructions exact- ly, a fire or explosion may result causing property damage, personal injury, or loss of life.

1.Open all warm air registers and make sure that all return-air grilles are unobstructed.

2.If a humidifier is installed with your system, open the water supply valve.

3.Set the thermostat to its lowest setting.

4.Turn on electric power to the furnace.

5.Open the oil supply valve.

6.Check all connections to ensure there are no leaks.

Turning Off Your Furnace

Follow these simple procedures to put your furnace into retirement for the summer.

1.Set the thermostat to the lowest setting.

2.Turn off all electrical power to the appliance.

3.Turn the oil supply off.

4.If applicable, turn off water supply to humidifier.

5.If furnace blower will be necessary for cooling sys- tem, remember to turn electrical power back on when needed for air conditioning.

MAINTAINING YOUR UNIT

In order to keep your furnace running properly and at the efficiency for which it was designed, the furnace MUST be inspected and serviced once a year. Lack of yearly service could lead to poor furnace performance and damage to the furnace.

Here are the things you should do and have your service technician do for you.

Homeowner:

1.Inspect and clean filter.

2.Make sure the following areas are clear: A. Outlet and return registers.

Lighting Your Furnace

!CAUTION

This furnace is equipped with an interrupted type electronic ignition system. DO NOT AT-

TEMPT TO LIGHT WITH A MATCH.

!DANGER!

HIGH VOLTAGE AT IGNITOR.

B. Air openings to furnace and furnace area.

C. Chimney or flue exhaust.

3. Set up yearly service.

Technician:

Minimum yearly service should include the following:

1.Check flue and secondary tube passage ways includ- ing chimney — clean if necessary.

2.Change oil filter.

3.Change nozzle.

4.Check and adjust combustion and draft.

5

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Carrier 58BMA, 58BLA, 58BTA manual Preparing Furnace For Operation, Turning Off Your Furnace, Lighting Your Furnace
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58BLA, 58BTA, 58BMA specifications

Carrier's 58BMA, 58BLA, and 58BTA are integral components of the brand's lineup of gas furnaces, known for their efficiency, reliability, and advanced technology. These models cater to diverse heating needs while prioritizing energy savings and comfort.

The 58BMA model stands out with its two-stage heating capabilities, which allows for a more consistent indoor temperature. This feature helps to minimize temperature fluctuations, providing homeowners with a more comfortable living environment. The variable-speed blower motor enhances this experience by adjusting the airflow according to the heating demands, ensuring even distribution throughout the home.

Similarly, the 58BLA is designed for energy efficiency. Equipped with a modulating gas valve, it offers precise temperature control by adjusting the heating output according to the thermostat settings. This model is ENERGY STAR® certified, meaning it meets strict efficiency guidelines set by the U.S. Environmental Protection Agency. The 58BLA also features a durable heat exchanger, which contributes to its longevity and reliability.

The 58BTA model focuses on providing a robust heating solution. It incorporates a single-stage gas valve that offers reliable performance at an affordable price point. The 58BTA is a great choice for homeowners seeking dependable heating without the complexity of advanced features. Its compact design allows for easy installation in various home layouts, making it an ideal fit for many different settings.

All three models share key characteristics such as a quiet operation, which is achieved through advanced sound attenuation technology. Homeowners can enjoy a peaceful ambiance without the disruptive noise often associated with traditional furnaces. Additionally, they come equipped with an advanced control system that allows for seamless integration with smart thermostats, enhancing energy management and comfort.

In summary, the Carrier 58BMA, 58BLA, and 58BTA models represent a blend of efficiency, advanced technology, and reliability. Each model addresses varying heating needs while focusing on energy savings and homeowner comfort. With features such as variable-speed blowers, modulating gas valves, and durable heat exchangers, these furnaces exemplify Carrier's commitment to innovation in indoor climate control. Whether for high efficiency or dependable performance, these models are designed to meet the expectations of modern homeowners.
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