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

This gas furnace is equipped with a fixed orifice sized for the manifold pressure shown on the rating label. The input can only be increased, or decreased, by adjusting the manifold pressure. Remove the 1/8" threaded pipe plug located on the gas manifold.

Use a U tube manometer or recently calibrated pressure gage to measure the pressure. To adjust the pressure, remove the screw cap from the regulator on the gas valve and using the adjustment screw. Decrease the pressure by turning the screw counterclockwise or increase it by turning the screw clockwise.

CAUTION: ADJUSTMENTS TO THE LISTED PRESSURE MUST NOT EXCEED 0.3" WC A 0.3" WC adjustment will increase or decrease the input approximately 4.0%.

Replace screw (cap) when adjustment is complete.

The correct input can be assumed if the furnace manifold pressure is the same as that shown on the rating label if a gas meter is not available for natural gas or the unit is installed on an unmetered propane gas supply.

Shut off the gas supply to the furnace. Remove the pressure gage and re-install the pipe plug using a thread compound resistant to the action of LP gases.

If the rated input cannot be obtained with the present orifice at the correct pressure, your local gas supplier may assist in sizing the proper orifice. Thermo Products Engineering Department will gladly assist in sizing the orifice if you provide them with the heating value in BTU per cubic foot and the specific gravity of the fuel gas.

L. BURNER ADJUSTMENT

: The GMD1-60 and GMD1-80 furnace models utilize an in-shot burner design that does not require an air shutter adjustment (air shutters are not used) for proper flame characteristics. Burner box access cover must always be secured with all screws in place and tightened before operating furnace.

This unit is designed to not require any burner adjustment. The flames should be checked by looking through the sight glass located on the burner box. Burner flames should be clear, blue, and almost transparent in color. (See Figure 8). NOTE: It is not unusual to have mostly blue flames with yellow or orange tips visible in the tube for propane gas.

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Thermo Products GDM1-80N, GMD1-60N service manual Burner Adjustment
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GMD1-60N, GDM1-80N specifications

Thermo Products has established itself as a leader in the manufacturing of high-performance heating solutions. Among their notable offerings are the GDM1-80N and GMD1-60N units, which have garnered attention for their innovative features and reliable performance.

The GDM1-80N is designed for applications that require robust heating capabilities. This model boasts an impressive output capacity, making it suitable for industrial and commercial settings. One of its key features is the advanced temperature control system that ensures consistent heating across various environments. This system utilizes precision sensors that monitor temperature in real-time, allowing for adjustments to maintain the desired levels effectively.

Another notable characteristic of the GDM1-80N is its energy efficiency. It is engineered with state-of-the-art technology that minimizes energy consumption while maximizing heat output. This is particularly beneficial for businesses looking to reduce operational costs while still maintaining high-performance heating.

In contrast, the GMD1-60N is tailored for slightly less demanding applications but still delivers exceptional performance. With a compact design, it is ideal for spaces where floor space is limited without compromising on heating efficiency. The GMD1-60N features a user-friendly control interface, allowing operators to easily set and monitor temperatures.

Both models incorporate durable construction materials, ensuring longevity and reliability in various working conditions. The robust design means they can withstand the rigors of industrial use while providing consistent performance over time. Additionally, they are equipped with safety features, including overheat protection and user-accessible maintenance points, which enhance their usability and safety.

Thermo Products has integrated smart technology into these units, with options for remote monitoring and management through IoT devices. This capability allows users to track energy usage and system performance, facilitating better decision-making regarding heating needs and maintenance schedules.

In conclusion, the Thermo Products GDM1-80N and GMD1-60N units represent advanced heating solutions that cater to a range of industrial and commercial applications. With their emphasis on energy efficiency, durability, and smart technology, these models stand out as reliable choices for those seeking effective heating solutions in their operations.
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