Dayton Operating Instructions and Parts Manual

3VG78

Dayton® Natural Gas

Construction Heater

Theory of Operation

THE FUEL SYSTEM

The gas supply attaches to the heater by a minimum 3/4 inch i.d. hose or flexible connector. User must supply hose or flexible connector. The length should be no more than 10 feet long. The natural gas moves through the solenoid valve and the internal regulator and out the nozzle.

THE AIR SYSTEM

The motor turns the fan. The fan pushes air into and around the combustion chamber. This air is heated and provides a stream of clean, hot air.

THE IGNITION SYSTEM

The direct spark ignition system (DSI) sends voltage to the ignitor, which ignites the fuel and air mixture.

THE SAFETY CONTROL SYSTEM

This system causes the heater to shut down if the flame goes out.

TEMPERATURE CONTROL SYSTEM

Built-in thermostat allows heater to cycle on and off to maintain consistent area temperature.

Natural Gas Supply

The user must furnish the natural gas supply and the connections to the heater.

Regulate the natural gas supply from a minimum 5 inches water column to a maximum of 1/2 psi. The natural gas supply capacity should be able to supply a minimum of 150 cubic feet of gas pressure for each heater connected to the system.

Consult your natural gas supplier for proper sizing of the natural gas supply lines.

Follow all local ordinances to codes. In the absence of local ordinances and codes, refer to the National Fuel Gas Code Handbook NFPA54/ANSI Z223.1 and the Natural Gas Installation Code, CAN/CGA B149.1.

Ventilation

Provide at least a three-square-foot

opening of fresh, outside air while running heater. If proper fresh,

outside air ventilation is not provided, carbon monoxide poisoning can occur. Provide proper fresh, outside air ventilation before running heater.

Installation

Review and understand the

warnings in the Safety Information section, pages 2 and 3. They are needed to safely operate this heater. Follow all local codes when using this heater.

Test all gas piping and connections for

leaks after installing or servicing. Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

1. Provide natural gas supply system (See

Natural Gas Supply).

 

 

Ignitor Fan

Motor

Clean

 

 

 

Heated

 

 

 

Air Out

 

 

 

(Front)

 

 

 

Combustion

Nozzle

Internal

 

Regulator

Power Cord

Chamber

 

 

 

 

On/Off Switch

 

 

DSI

 

 

 

Solenoid

 

 

 

Valve

 

 

 

Air For Combustion

Fuel

 

 

And Heating

 

Figure 3 - Cross Section Operational View

2.

Install plumbing to a low pressure

 

natural gas source. The source must be

 

regulated to a maximum 1/2 psi. The

 

plumbing must be a minimum 3/4 inch

 

i.d. hose or flexible connector not over

 

10 feet long.

3.

Connect hose to heater at the 1/2 inch

 

SAE flare fitting at the inlet.

Hose

1/2" Inlet Connector

Figure 4 - Hose and Inlet Connector

4

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Dayton 3VG78 instruction manual Theory of Operation, Natural Gas Supply, Ventilation, Installation

3VG78 specifications

The Dayton 3VG78 is a versatile and advanced electric motor that has gained recognition in various industries for its exceptional performance and reliability. Designed with cutting-edge technology, the 3VG78 offers an ideal solution for those seeking efficient and powerful motor capabilities.

One of the main features of the Dayton 3VG78 is its robust construction. Built with high-quality materials, this motor ensures durability and longevity, making it suitable for demanding applications. The motor is designed to operate under various environmental conditions, which enhances its adaptability and usability in different settings.

The 3VG78 boasts a premium efficiency rating, which translates to lower energy consumption. This not only reduces operational costs but also makes it an eco-friendly choice for businesses aiming to decrease their carbon footprint. The incorporation of premium efficiency motors aligns with global sustainability goals, prioritizing energy-saving technologies.

Another key characteristic of the Dayton 3VG78 is its compact design, which allows for easy installation in a variety of settings. Whether it’s for HVAC systems, conveyors, or other industrial applications, the motor fits seamlessly into existing setups without requiring extensive modifications. This flexibility is a significant advantage for industries seeking to upgrade their equipment with minimal disruption.

In terms of performance, the Dayton 3VG78 operates at a high RPM, delivering excellent torque output. This capability ensures that machinery functions effectively, enhancing overall productivity. Additionally, the motor can handle both high load conditions and variable speed applications, making it a suitable choice for diverse operational requirements.

The Dayton 3VG78 is also equipped with advanced thermal protection features. This ensures that the motor remains safe during operation, preventing overheating and potential damage. Such technology protects the investment and prolongs the lifecycle of the motor.

Overall, the Dayton 3VG78 combines robust construction, energy efficiency, compact design, and advanced performance technologies. These characteristics make it an ideal choice for a variety of applications within the industrial sector. By choosing the Dayton 3VG78, businesses can enhance their operational efficiency while embracing sustainable practices. As industries evolve and demand higher reliability from equipment, electric motors like the 3VG78 set a benchmark in performance and innovation.