Multiquip MQP20IZ, MQP40IZ, MQP45GM, MQP60IV, MQP50IZ, MQP30GM Acoustic Material, Reducing Noise

ENVIRONMENTAL CONSIDERATIONS — dB(A)

Acoustic Material

Consider the following when selecting acoustic material:

1.DO NOT use fiberglass as an acoustic material. Fiberglass is a poor selection of acoustic material because of its low density, poor flame retardant, and poor cleanability.

2.Foam is least likely to deteriorate due to abrasion and has good aesthetics. However, foam is difficult to clean and not all foams are fire retardant.

3.A concrete block enclosure is an excellent barrier in regards to noise reduction. The blocks may be filled with sand to make the wall more dense. However, concrete housing tends to become hot and superior cooling methods will be required for proper engine performance.

Acoustic Material

Figure 5 below illustrates installation methods for reducing noise level to achieve a quieter operating generator set.

	Structure of	Vertical
		Exhaust
	Sufficient Density
				Critical Grade
	to Contain Noise
			Muffler 25-35 dB(A)
				Attenuation
Wind / Noise Barrier	Flexible Duct			Flexible Exhaust
	Section
				Connector

		Acoustic
Isolation	Vibration	Louvers
Foundation	Isolator

Figure 5. Reducing Noise

PAGE 32 — INDUSTRIAL GENERATOR SETS — APPLICATION & INSTALLATION MANUAL — REV. #4 (09/07/07)