Troubleshooting

WARNING: Before taking any corrective action, make certain unit is not capable of operation during repairs.

PROBLEM	CAUSE	CORRECTIVE ACTION

	System resistance too high	Check system for proper operation of backdraft or
	System resistance too high	control dampers; remove obstructions in ductwork, etc.
		control dampers; remove obstructions in ductwork, etc.

	Unit running backwards	See Pre-Starting Checks.

Reduced Airflow	Fan speed too low	Increase fan speed.

	Excessive dirt buildup on	Clean wheel.
	wheel	Clean wheel.
	wheel

	Improper wheel alignment	Center wheel on inlets.

	Bad Bearings	Replace.

	Belts too tight or too loose	Refer to Figure 4 and adjust tension.

	Wheel improperly aligned and	Center wheel on inlets. See Figure 1.
	rubbing	Center wheel on inlets. See Figure 1.
	rubbing
Excessive Noise
Excessive Noise	Loose drive or motor pulleys	Align and tighten. See Pre-Start-up Checks.
or Vibration	Loose drive or motor pulleys	Align and tighten. See Pre-Start-up Checks.

	Foreign objects in wheel or	Remove objects, check for damage or unbalance.
	Foreign objects in wheel or
	housing
	housing

	Unbalance of wheel caused
	by excessive dirt and grease	Remove buildup.
	buildup

Maintenance Documentation

Job Information

Job Name:___________________________________	Service Organization:__________________________________
Address:_____________________________________	Address:_____________________________________________
City:_________________________________________	City:_________________________________________________
State:________________ Zip:__________________	State:________________ Zip:___________________________
Phone:_______________________________________	Phone:_______________________________________________
Contact Person:______________________________	Work Done By:________________________________________

Nameplate Information		Field Start-Up Documentation
Model:_______________________________________
Volts:_ ________ Hertz:_________ Phase:_______		Actual Voltage:________ Hertz:_______ Phase:_________
Amps:_______________	Mark:_________________	Actual Amperage:_____________________________________
Supply hp:___________	Exhaust hp:___________	Blower Rotation:______________________________________
Serial Number:________________________________		Air Volume: Design cfm:______________________________
Model Voltage:________________________________		Actual cfm:______________________________
Motor Amperage:_ ____________________________		Level of fan (L or H):___________________________________
Fan RPM:_ ___________________________________		Fan RPM Range (min.)____________ (max.)______________

Series L: Models LB, LBP, LD, and LDP

LBP, LD AND LDP, Series L Models LB specifications

Greenheck's Fan Series L Models—LB, LD, LDP, and LBP—are engineered to provide efficient and reliable ventilation solutions for commercial and industrial applications. These fan models stand out due to their high-performance capabilities, advanced technology, and customizable features that meet various system requirements.

One of the key characteristics of the L Model series is its construction quality. These fans are built using robust materials that ensure longevity and durability, making them suitable for harsh operating environments. Additionally, the aerodynamic design of the fan blades enhances airflow while minimizing noise, leading to a quieter operation, which is particularly beneficial in places like schools, hospitals, and office buildings.

The LB series is particularly designed for general ventilation applications and incorporates a broad range of features. It includes a wide selection of fan sizes and capacities, allowing businesses to select the ideal model that suits their specific airflow and pressure needs. The inline belt drive setup is adjustable, offering flexibility in performance tuning based on application requirements.

For those with more stringent noise requirements, the LD model is specifically engineered for low-noise operations. The LD series incorporates acoustic materials and optimized blade designs that significantly reduce operational noise levels, making it perfect for noise-sensitive environments, such as healthcare facilities.

On the other hand, the LDP model emphasizes high-performance static efficiency. This model is particularly effective for applications requiring high pressure. With direct drive motors, the LDP fans deliver reliable performance with reduced maintenance needs. The design minimizes failure areas, making it a dependable choice over traditional belt-driven fans.

Lastly, the LBP fans are designed for building pressure applications, making them ideal for spaces that require controlled environments or negative and positive pressure situations. The robust motor options provided in this series enhance operational capabilities across various conditions.

All models in the Greenheck L Series come equipped with advanced technologies, including variable frequency drive (VFD) compatibility. This feature enables users to adjust fan speed based on changes in airflow requirements, further improving energy efficiency and reducing operating costs.

Overall, the Greenheck Fan Series L Models—LB, LD, LDP, and LBP—represent a culmination of advanced engineering and user-centric design, delivering superior performance, energy efficiency, and durability tailored to a wide range of ventilation needs across various industries.