All installations and services must be performed by qualified service personnel.

On highboy furnaces, it is necessary to cut the return air opening in the side or rear casing, depending upon the needs of the specific installation.

The filter rack provided with the furnace, refer to Fig. 5, will serve as a template to scribe a mark for the return air opening on the casing. Place the filter rack on the casing one inch up from the bottom of the furnace and centered from side to side. Place the securing flange against the casing when locating the return air opening.

Fig. 5: A typical filter rack and dimensions for the highboy furnaces.

PLEASE NOTE: While scribing the return air opening, the filter rack can be held in position by tape or similar temporary means.

Position the open end of the filter rack so as to provide access for filter replacement. Once the filter rack is positioned correctly, scribe a line along the inside of the securing flange on three of the sides. To scribe a line on the fourth side (the open end), use the open end support as a guide.

Remove the filter rack and cut the return air opening in the casing. Now the filter rack can be anchored to the furnace with screws or pop-rivets through the securing flange of the filter rack.

?WARNING: When cutting openings in the casing DO NOT CUT ANY SUPPORTING CLIPS OR ANGLES. Cut as close to the scribed line as possible, but do not cut the base clip or blower pan support angle. (See Fig. 6).

Fig. 6: Cutaway view of fan section of a typical highboy furnace.

Connect the return air plenum to the filter rack and slide the filter into place. Dimensions for adapting the return air plenum to the filter rack are provided on the bottom of the previous page.

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Thermo Products OT11-105, OT5-85, OH2-56, OH16-125, OL16-125 Typical filter rack and dimensions for the highboy furnaces
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OC5-85, OC2-56, OL11-105, OL2-56, OL20-151 specifications

Thermo Products offers a range of advanced temperature control solutions tailored for various industrial applications. Among the lineup are the OC2-56, OH16-125, OL37-250, OH11-105, and OL16-125 models, each designed with cutting-edge technologies and unique characteristics that cater to diverse user needs.

The OC2-56 is a compact and efficient temperature controller that excels in providing precise thermal management. It features advanced PID control algorithms, ensuring stable temperature regulation, while its robust build guarantees durability in tough environments. The intuitive user interface enables effortless temperature adjustments, making it suitable for both novice and experienced users.

The OH16-125 model is specifically engineered for applications requiring high-temperature processing. With a maximum operational temperature of 125°C, this unit includes an innovative heat exchanger that enhances thermal efficiency. Its easy-to-read digital display provides real-time temperature feedback, and its compact footprint allows for space-saving installations in demanding environments.

Designed for maximum versatility, the OL37-250 is perfect for large-scale operations. It supports multiple heating elements and comes equipped with a powerful heating mechanism, capable of reaching temperatures up to 250°C. The unit's intelligent monitoring system ensures optimal performance, while its user-friendly interface simplifies setup and operation.

The OH11-105 offers a unique combination of performance and energy efficiency. With a maximum temperature of 105°C, this model is ideal for medium-sized applications where reliable heat delivery is essential. Its state-of-the-art insulation technology helps reduce heat loss, making it an environmentally friendly option. Additionally, the OH11-105 features integrated safety mechanisms, protecting both the unit and the user.

Lastly, the OL16-125 is designed to support a wide range of industrial processes. With programmable settings and an easy-to-navigate control panel, this unit allows users to set specific temperature profiles for different applications. Its sturdy construction and high safety ratings make it an ideal choice for rigorous environments.

Overall, Thermo Products' OC2-56, OH16-125, OL37-250, OH11-105, and OL16-125 models showcase a commitment to quality, reliability, and innovation in thermal management technology. Each model is crafted to meet the highest standards and cater to the diverse needs of various industries, ensuring optimal performance in every application.
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