DRYER PRE START CHECKS

TERING ROLL SPEED should in- crease. Turning either knob coun- terclockwise will decrease the speed. Make sure the drive chain tension is properly adjusted and all sections of the metering rolls ro- tate. Turn the UNLOAD switch OFF after these checks are complete. The bottom auger will continue to run for 30 seconds after the switch is turned OFF to allow for cleanout.

FAN SWITCH

Bump the FAN switch and observe the fan rotation. The fan should run counterclockwise. Sometimes on three phase models all motors will run backwards. They can easily be reversed by interchanging the two of three power supply wires. Re- verse the two outside wires, L1 and L3, and leave the middle one in the same position.

Note: If the dryer is empty, the burner will not operate. The fans cannot create enough static pres- sure to engage the air switch. You will receive a loss of airflow message.

BURNER SAFETY

To check the burner safety function, first make sure the main GAS VALVE is OFF. Turn the FAN switch ON and allow the fan to start. Then, turn the HEATER switch ON. The dryer will shut down after 20 seconds. The safety message, "Burner 1 warn- ing flame not detected" will appear.

BURNER TEST FIRE

ignite after a short purge delay of ap- proximately 10 seconds. Gas pres- sure should be shown on the gauge. At this time adjust the BURNER HIGH-LOW FIRE THERMOSTAT to 200°F, causing the burner to oper- ate on high-fire. The thermostat is located on the front left side of the dryer. Observe the gas pressure on gauge, and turn the thermostat to its MINIMUM SETTING, causing the burner to cycle into low-fire. As the burner thermostat is turned down the gas pressure should also show a noticeable drop, indicating that the high-fire solenoid is closed and the burner is being supplied with less gas through the low-fire control valve. At this time set the high-

3

4

2

1

 

fire and low-fire pressure settings. Use the PRESSURE REGULATOR for high-fire and the BALL VALVE for low-fire. The thermostat should cycle between high and low, ap- proximately 4 to 5 times per minute.

Approximate settings should be:

LP Gas

High-Fire 6-15 lbs.

 

Low-Fire 2-6 lbs.

Natural Gas

High-Fire 6-10 lbs.

 

Low-Fire 1-3 lbs.

If the burner remains on high- fire and does not cycle, INCREASE the regulator setting on the propane models, or the supply valve on the natural gas models in order to reach the thermostat setting. If the burner remains in low-fire and does not cycle, slightly DECREASE gas

7

5

8

6

START the fan, and then turn the HEATER switch to ON. Turn ON the fuel supply, and the burner should

The dryer fan and heater controls featuring: 1-pressure regulator, 2-low-fire control valve, 3-high pressure solenoid, 4-low pressure solenoid, 5-high- low fire thermostat (assembly includes thermometer), 6-fuel supply line, 7- LP solenoid or supply ball valve(NG) and 8-air pressure switch.

16

Page 15 Page 17
Page 16
Image 16
Airstream PNEG-339 service manual Burner Safety, Burner Test Fire
Page 15 Page 17

PNEG-339 specifications

The Airstream PNEG-339 is a highly regarded model in the realm of agricultural storage and handling equipment, specifically designed for grain management. Its innovative features and robust technologies make it a valuable asset for farmers and grain handlers seeking efficiency and reliability.

One of the primary characteristics of the PNEG-339 is its seamless construction. Built with high-quality materials, the unit is engineered to withstand the rigors of outdoor environments while providing durable protection for stored grains. The design minimizes maintenance requirements, ensuring that users can focus on their core agricultural operations without the distraction of frequent repairs.

The PNEG-339 is equipped with advanced aeration systems that enhance the preservation of grain quality. This technology allows for optimal airflow circulation, reducing moisture levels and minimizing the risk of spoilage. By maintaining the ideal conditions for grain storage, farmers can ensure better yields and profitability.

Another notable feature of the PNEG-339 is its scalability. This model can easily be integrated into existing grain handling systems, accommodating various storage capacities. Whether managing small-scale operations or large agricultural enterprises, the PNEG-339 offers flexibility in design and implementation, making it suitable for diverse agricultural needs.

The unit also boasts user-friendly controls and monitoring systems, allowing operators to manage grain conditions efficiently. Real-time data and automated alerts assist in maintaining optimal storage conditions, thus reducing labor costs and enhancing operational efficiency. As a result, farmers can make informed decisions quickly and effectively.

Additionally, the PNEG-339 incorporates energy-efficient technologies that contribute to sustainability in agriculture. By utilizing energy-saving components, this model not only lowers operational costs but also aligns with the growing emphasis on environmentally responsible farming practices.

Overall, the Airstream PNEG-339 stands out as a top-tier choice for grain storage and handling. With its durable construction, advanced aeration systems, scalability, user-friendly controls, and energy efficiency, it meets the demands of modern agricultural operations. Its design and functionality reflect a commitment to quality and performance, making it an essential tool for those in the agricultural sector aiming to enhance their productivity and maintain the integrity of their grain stores.
Top Page Image Contents