Energy Tech Laboratories Modular Direct Fired Heaters instruction

airflow switch to close. The high airflow switch protects against profile plate failures that cause excessive airflow through the burner. In the event that the pressure drop across the burner is not in the range of the airflow switch, gas flow to the burner is stopped by the Flame Safety Control.

The graphs below illustrate the approximate cfm going through the unit vs. the differential pressure measured by the airflow switch. Simply measure the differential profile pressure drop at the airflow tubes in the unit and match that value up to the matching unit curve below. This will show the cfms traveling through the burner and will indicate proper airflow or airflow problems (too much or not enough). If the pressure drop is outside of the .15” to .65” range, the blower rpm should be adjusted to fix airflow.

Size 1-3 Heater CFM vs. Burner Profile Pressure

	10000
	9000		Size 1
			Size 2
	8000		Size 3
	7000
	6000
CFM	5000
CFM
	4000
	3000
	2000
	1000
	0
	0.15	0.2	0.25	0.3	0.35	0.4	0.45	0.5	0.55	0.6	0.65

Burner Differential Profile Pressure (in. w.c.)

Size 4-5 Heater CFM vs. Burner Profile Pressure

	25000
	23000		Size 4
			Size 4
	21000		Size 5
	21000
	19000
	17000
CFM	15000
CFM	13000
	13000
	11000
	9000
	7000
	5000
	3000
	0.15	0.2	0.25	0.3	0.35	0.4	0.45	0.5	0.55	0.6	0.65

Burner Differential Profile Pressure (in. w.c.)

Modulating Gas System

The second system, the Maxitrol modulating gas system, consists of a temperature selector dial, a discharge air sensor, an amplifier, and a modulating gas valve. The two types of Maxitrol systems used are the Maxitrol 14 series or the Maxitrol 44 series. The Maxitrol 14 utilizes a discharge air sensor and modulates the Maxitrol gas valve to provide discharge air to match the selected temperature on the temperature selector. The Maxitrol 44 utilizes a room temperature sensor to control room temperature as well as a discharge air sensor in order to control the discharge air temperature. The modulating gas valve controls the amount of gas flow to the burner based on the temperature rise needed. When the modulating gas valve is all the way open and achieving the maximum BTUs and temperature rise of the unit, it is called “high fire”.

Maxitrol 14

Amplifier

High Temperature Limit

One of the back up safety device is the high temperature limit switch.	High Temperature Limit
This switch is a mechanical thermostat that measures the temperature
inside the unit downstream of the burner. If the factory-set temperature
of 170°F is exceeded, it will signal the FSC to turn off the burner. This
requires a manual reset of the high temperature limit. This insures that
the discharge does not exceed 185°F.

Operation Summary

With the blower already running and the airflow switch proven;

9The outside air temperature falls below the setting of intake air thermostat or

9The optional remote panel is set to “Manual” and “Heat” mode

•The FSC in energized and the following occurs;

9FSC indicates that it has power by illuminating the OPR CTRL LED

9FSC verifies proper Airflow

Modular Direct Fired Heaters specifications

Energy Tech Laboratories has established itself as a leader in the development of innovative modular direct fired heaters, designed to meet the evolving demands of industries that require efficient and effective heating solutions. These heaters are engineered to offer versatility, reliability, and enhanced performance, making them suitable for a broad range of applications.

One of the standout features of Energy Tech Laboratories' modular direct fired heaters is their modular design. This allows for easy scalability and customization, enabling users to adjust the heating capacity according to specific requirements. The modular aspect also facilitates straightforward installation and maintenance, reducing downtime and operational costs.

The heaters utilize advanced combustion technology that optimizes fuel consumption while minimizing emissions. This ensures not only a cost-effective operation but also compliance with environmental regulations. By combining high thermal efficiency with a low carbon footprint, these heaters contribute to sustainable energy practices.

In addition to their efficient combustion system, Energy Tech Laboratories incorporates state-of-the-art control technologies in their heaters. These systems allow for precise temperature regulation and can be integrated with existing Building Management Systems (BMS) for enhanced monitoring and control. Users can benefit from real-time data and analytics, which help in diagnosing potential issues and optimizing performance.

Durability is another characteristic that sets these heaters apart. Constructed with high-quality materials, they are designed to withstand harsh industrial conditions, ensuring a long service life. The robust design minimizes the likelihood of breakdowns, which is critical for industries that rely on continuous operation.

Moreover, Energy Tech Laboratories emphasizes safety in the design of their modular direct fired heaters. Equipped with multiple safety features such as flame detection, gas leak detection, and emergency shutdown systems, these heaters are built to operate within stringent safety standards.

The flexibility of these heaters makes them suitable for various sectors, including oil and gas, manufacturing, and construction. Their ability to provide direct heat quickly and efficiently makes them ideal for processes that require consistent temperature control.

In conclusion, Energy Tech Laboratories' modular direct fired heaters represent an advanced solution for today’s energy needs. With their modular design, advanced combustion technologies, and focus on safety and durability, these heaters stand out as a preferred choice for industries seeking reliable and efficient heating solutions. Their commitment to innovation and sustainability positions them as a front-runner in the energy technology sector.