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March 2017 RLC-PRB039C-GB Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

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Page 1: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

March 2017 RLC-PRB039C-GB

Engineering bulletin

Sound ratings and installation guide Air-cooled screw chiller model RTAF

Page 2: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

When installing any chiller, forethought should be given to the chiller and its relationship with the structure. Issues such as sound and vibration should be considered and factored into the building design and chiller location within a given structure. These issues are not unique to chillers but should be considered when any mechanical device is located in or on a structure.

This bulletin is not intended to be a replacement for a sound consultant, but rather a tool for you to advise owners, engineers and contractors of useful tips when designing and installing chiller installations. This engineering bulletin provides guidelines for addressing both unit location and airborne sound when installing Trane air-cooled Sintesis™ RTAF chillers.

Unit Location Outdoor HVAC equipment must be located to minimize noise and vibration transmission to the occupied spaces of the building structure it serves. Also, the equipment must be located to prevent objectionable noise levels at adjacent property lines or building structures. When choosing a location for the equipment, consider the following application material for both ground level and roof mounted equipment.

Ground Level Equipment If the equipment must be located in close proximity to a building, it should be placed next to an unoccupied space such as a storage room, mechanical room, switch gear/electrical room or other typically unoccupied space. It is not recommended to locate the equipment near occupied, sound sensitive areas of the building or near windows. Also, do not locate the equipment adjacent to other building walls or large objects which may reflect the sound back to the sound sensitive receiver.

Seal all piping and electrical conduit penetrations in the building envelope with an approved fire safe sealant. Utilize insulated, dielectrically compatible sleeves at wall penetrations to properly support the piping and provide vibration damping. Provide flexible couplings and vibration isolators for the water circulating pump and connections to prevent the transmission of sound throughout the building.

Install the unit on a pad isolated from the building or install the unit with proper vibration isolation underneath the unit to prevent machine vibrations from being transmitted to the structure of the building.

Roof Mounted Equipment Roof Location The single most effective recommendation to prevent sound problems within a building is to locate the unit over non- critical areas such as copy rooms, restrooms, storage rooms, and other similar non-occupied areas of the building. It is not recommended to locate a unit directly over or in close proximity to sound sensitive areas such as conference rooms, executive office spaces, libraries, etc.

It is not recommended to locate the equipment near occupied, sound sensitive areas of the building or near window glass. Also, do not locate the equipment adjacent to other building walls or large objects which may reflect the sound back to the sound sensitive receiver.

Building Structure When mounting the chiller on the roofline, it is not recommended to locate the unit on a beam or structure at mid-span of the column grid. Rather, directly support the unit over columns. Nor is it recommended to locate the unit in the middle of a horizontal beam. Try to avoid large column spans. This will minimize the roof deflection vibration transmission.

When directly mounting chillers on I-beams that are above the roofline and mounted to the building support columns, there exists the potential for a resonant frequency at which higher than normal vibration may be transmitted to the rest of the building. Be cognizant of this application. A consultant may be required for evaluation.

Page 3: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

Figure 1. Mounting Structure

Base

When directly mounting chillers on I-beams (at the roofline) that are mounted to the building, support columns can potentially transmit higher than normal vibration at a resonant frequency to the rest of the building. The above drawing depicts what type of prevention methods can be taken.

Figure 2. Prevention methods

Unit Location It is not recommended to bolt down vibrating equipment directly to foundation without using isolators.

Install the unit upon an inertia base or concrete pad structure with vibration isolation to match the characteristics of the roof structure. Beware of lightweight roof structures which are difficult to isolate from vibration.

Use an inertia base or solid concrete pad as a base for the chiller. This mass, properly supported, will maximize vibration dampening and help prevent noise from penetrating through the roof directly below the unit. Floors and ceiling should be concrete slabs.

Page 4: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

Isolators Isolate the unit on elastomeric isolators selected to match the characteristics of the roof structure. It is not recommended that equipment be applied to buildings with a lightweight roof structure unless column supports are provided which are independent of the roof structure.

Chilled Water Piping Provide flexible couplings and vibration isolators for the water circulating pump connections to prevent the transmission of sound throughout the building. Isolate pipe hangers with flexible isolators. This reduces vibration transmission to the building. Do not let the chiller support the weight of the chilled water piping. Isolating pipe hangers this way reduces vibration transmission to the building.

Electrical Electrical connections to the chiller should be in flex conduit. Hard electrical conduit is another vibration path that should be eliminated in chiller installations.

Sealing Penetrations Seal all piping and electrical conduit penetrations in the building envelope with an approved fire safe sealant. Utilize insulated, dielectrically compatible sleeves at wall penetrations to properly support the piping and provide vibration damping. Acoustically treat all wall penetrations (piping, conduit, duct, outdoor vents, etc.)

Sound Attenuation Using Barrier Walls Reciprocating chillers are characterized by a low frequency pounding sound that is typically difficult to attenuate. The Screw Series R RTAC compressors and condenser fans have a medium frequency characteristic that may be attenuated with simple, inexpensive barrier walls.

A barrier wall constructed to only 1.3 cm exterior grade plywood gives a dramatic 10 dB(A) reduction in sound. Refer to Figure 5 for minimum wall requirements. Solid walls of brick or other more robust outdoor materials are equally acceptable and can be expected to give better attenuation. Masonry block walls with special sound absorbing cavities should be considered for critical applications. A minimum distance of 1.2 m is recommended, but the chiller may be placed closer than 1.2 m to a barrier wall. Some loss of performance will occur.

Louvered panels or decorative walls with any amount of open area should not be used to attenuate sound. They have little or no sound reflecting or attenuating benefit. Also, an insulated sheet metal box covering the compressors alone will provide minimal sound attenuation and is not recommended.

Figure 3. Barrier wall construction

Page 5: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

Building Upper Story Sound Problems Air-cooled chillers are sometimes installed adjacent to and below the occupied space of larger buildings, where the noise sensitivity of the upper stories of the building may be a concern. Once again, use of an acoustical barrier wall can be very effective. Refer to Figure 6. The acoustical barrier wall placed as shown in Figure 6 attenuates both compressor and fan noise and will yield an estimated 10 dB(A) sound pressure reduction in the “shadow” area created by the wall. In order to create the largest possible “shadow” area, the acoustical barrier wall should be as tall as possible, with the unit placed as close as possible to the barrier wall and the unit placed as far from the building as possible. The unit should be located a minimum of 4.5 m from the building to minimize the potential for reflected sound. Also seal any electrical or water assemblies that penetrate the barrier wall to avoid “sound leaks” towards the building. Refer to Figure 5 for minimum construction requirements of barrier walls.

Figure 4. Use of attenuation for upper story building sound problems

Sound Power and Sound Pressure “Sound power” and “Sound pressure” are two distinct and commonly confused characteristics of sound. Both share the same unit of measure, the decibel (dB), and the term “sound level” is commonly substituted for each. However, to understand how to measure and specify sound, the HVAC system designer must first understand the difference between these properties.

Page 6: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

SOUND LEVEL Sound power is the acoustical energy emitted by the sound source, and is an absolute value. It is not affected by the environment.

Sound pressure is a pressure disturbance in the atmosphere whose intensity is influenced not only by the strength of the source, but also by the surroundings and the distance from the source to the receiver. Sound pressure is what our ears hear, what sound meters measure…and what ultimately determines whether a design achieves quality sound.

Sound power levels

Sound power levels were gathered in accordance with ISO 9614‐1996 for the overall. The sound levels given by octave band are for information only. Reference source is 1 pW. Sound power levels are valid under free field conditions only. The tolerance on overall sound power level is +3dB(A) in accordance with Eurovent regulations.

In the tables below, sound level par octave band are in dB and global sound level are in dB(A).

Page 7: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

1. SOUND POWER LEVELS RTAF Standard Efficiency (SE) 1.1 SOUND POWER LEVELS RTAF Standard Efficiency Standard Noise (SE SN)

Sound Power Levels Standard Efficiency Standard Noise SE SN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 90,3 92,0 89,5 92,3 87,2 76,6 68,4 95 dB(A) 105 92,8 92,2 92,0 92,1 84,3 76,3 69,2 95 dB(A) 125 91,4 93,3 91,3 92,1 85,8 76,2 68,4 95 dB(A) 140 91,4 94,9 91,8 93,1 87,4 77,2 69,2 96 dB(A) 145 91,4 94,9 91,8 93,1 87,4 77,2 69,2 96 dB(A) 150 88,9 92,3 91,0 93,1 89,1 75,7 67,3 96 dB(A) 155 88,9 92,3 91,0 93,1 89,1 75,7 67,3 96 dB(A) 170 90,5 93,4 93,3 94,5 87,9 76,7 68,7 97 dB(A) 175 90,5 93,4 93,3 94,5 87,9 76,7 68,7 97 dB(A) 185 89,2 91,6 92,6 94,4 89,5 76,0 67,9 97 dB(A) 190 89,2 91,6 92,6 94,4 89,5 76,0 67,9 97 dB(A) 200 89,7 91,5 93,5 94,7 87,6 75,9 68,2 97 dB(A) 205 89,7 91,5 93,5 94,7 87,6 75,9 68,2 97 dB(A) 250 93,4 95,4 94,7 97,1 88,3 76,8 66,7 99 dB(A) 280 92,1 95,6 96,5 98,0 88,9 77,3 67,0 100 dB(A) 310 92,4 96,3 96,9 99,1 90,2 77,9 66,9 101 dB(A) 350 92,7 96,7 96,7 99,2 89,8 77,7 65,9 101 dB(A) 355 98,0 99,0 96,0 96,0 94,0 89,0 86,0 101 dB(A) 380 92,4 96,6 96,7 99,2 89,8 77,6 65,0 101 dB(A) 410 93,2 97,6 97,7 100,2 90,8 78,4 65,1 102 dB(A) 450 98,0 100,0 97,0 97,0 95,0 90,0 87,0 102 dB(A)

Page 8: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

1.2 SOUND POWER LEVELS RTAF Standard Efficiency Low Noise (SE LN)

Sound Power Levels Standard Efficiency Low Noise SE LN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 89,5 90,5 87,8 89,2 82,6 74,0 67,1 92 dB(A) 105 90,6 90,4 89,5 88,8 80,7 73,6 67,4 92 dB(A) 125 89,5 91,4 89,1 88,9 81,4 73,4 66,8 92 dB(A) 140 89,9 92,9 89,6 90,0 82,7 74,4 67,6 93 dB(A) 145 89,9 92,9 89,6 90,0 82,7 74,4 67,6 93 dB(A) 150 88,5 91,1 89,4 90,1 84,2 73,3 66,3 93 dB(A) 155 88,5 91,1 89,4 90,1 84,2 73,3 66,3 93 dB(A) 170 89,0 91,4 90,3 91,7 83,5 73,8 66,9 94 dB(A) 175 89,0 91,4 90,3 91,7 83,5 73,8 66,9 94 dB(A) 185 88,5 90,2 90,2 91,6 84,6 73,5 66,5 94 dB(A) 190 88,5 90,2 90,2 91,6 84,6 73,5 66,5 94 dB(A) 200 88,2 89,7 90,2 91,9 83,3 73,1 66,2 94 dB(A) 205 88,2 89,7 90,2 91,9 83,3 73,1 66,2 94 dB(A) 250 90,3 95,0 91,5 93,9 84,6 74,9 65,3 96 dB(A) 280 88,5 95,1 93,4 94,9 85,2 75,3 65,5 97 dB(A) 310 88,7 96,2 93,7 96,1 86,1 76,1 65,8 98 dB(A) 350 88,5 96,7 93,6 96,1 85,8 76,1 65,4 98 dB(A) 355 98,0 99,0 95,0 95,0 93,0 85,0 79,0 100 dB(A) 380 88,0 96,7 93,6 96,1 85,8 76,0 64,7 98 dB(A) 410 88,5 97,7 94,6 97,1 86,8 76,9 65,1 99 dB(A) 450 98,0 100,0 96,0 96,0 94,0 86,0 80,0 101 dB(A)

Page 9: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

1.3 SOUND POWER LEVELS RTAF Standard Efficiency Low Noise Night Noise Setback (SE LN+NNSB)

Sound Power Levels Standard Efficiency Low Noise Night Noise Setback SE LN+NNSB

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 82,6 87,2 83,7 86,4 81,3 70,9 59,9 89 dB(A) 105 86,9 86,8 87,9 85,3 77,7 69,6 60,7 89 dB(A) 125 84,0 89,0 86,7 85,6 79,0 69,3 59,5 89 dB(A) 145 82,3 90,9 86,8 86,7 80,6 70,3 60,1 90 dB(A) 155 80,2 87,7 86,3 87,1 82,2 68,7 58,4 90 dB(A) 175 80,6 87,5 87,3 88,9 80,8 68,9 59,1 91 dB(A) 190 80,0 85,6 87,2 88,8 82,2 68,5 58,7 91 dB(A) 205 79,7 84,7 87,1 89,2 80,5 68,0 58,6 91 dB(A) 250 86,8 93,0 89,4 92,0 82,5 72,0 58,2 94 dB(A) 280 83,6 93,0 91,4 92,9 83,1 72,6 59,5 95 dB(A) 310 83,3 94,2 91,6 94,1 84,0 73,4 59,4 96 dB(A) 350 83,3 94,7 91,5 94,1 83,7 73,5 58,6 96 dB(A) 380 83,2 94,7 91,5 94,1 83,7 73,5 58,4 96 dB(A) 410 84,2 95,7 92,5 95,1 84,7 74,5 59,3 97 dB(A)

Page 10: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

1.4 SOUND POWER LEVELS RTAF Standard Efficiency Extra Low Noise (SE XLN)

Sound Power Levels Standard Efficiency Extra Low Noise SE XLN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 87,8 89,3 84,2 84,2 79,0 71,0 65,2 88 dB(A) 105 90,7 91,3 87,1 83,9 77,4 72,4 67,9 89 dB(A) 125 90,0 91,4 86,7 84,2 78,1 72,1 67,4 89 dB(A) 140 89,7 91,6 86,4 84,4 78,4 72,1 67,3 89 dB(A) 145 89,7 91,6 86,4 84,4 78,4 72,1 67,3 89 dB(A) 150 87,7 90,3 86,7 86,6 81,2 70,4 65,2 90 dB(A) 155 87,7 90,3 86,7 86,6 81,2 70,4 65,2 90 dB(A) 170 88,9 90,4 88,0 86,2 79,1 71,6 66,4 90 dB(A) 175 88,9 90,4 88,0 86,2 79,1 71,6 66,4 90 dB(A) 185 88,3 90,4 88,3 87,7 81,7 71,1 65,8 91 dB(A) 190 88,3 90,4 88,3 87,7 81,7 71,1 65,8 91 dB(A) 200 89,2 90,4 89,2 87,4 79,9 72,0 66,7 91 dB(A) 205 89,2 90,4 89,2 87,4 79,9 72,0 66,7 91 dB(A) 250 89,1 95,4 86,9 89,6 84,2 71,7 66,2 93 dB(A) 280 87,9 92,9 90,6 91,7 82,1 72,9 65,0 94 dB(A) 310 87,4 93,1 90,2 91,8 82,0 72,8 64,6 94 dB(A) 350 86,6 96,1 87,6 90,7 85,2 71,2 66,2 94 dB(A) 355 95,0 99,0 93,0 94,0 90,0 83,0 79,0 99 dB(A) 380 87,3 94,2 90,7 93,0 82,7 73,4 64,3 95 dB(A) 410 86,7 94,1 90,7 93,0 82,7 73,2 63,5 95 dB(A) 450 96,0 100,0 94,0 95,0 91,0 85,0 81,0 100 dB(A)

Page 11: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

1.5 SOUND POWER LEVELS RTAF Standard Efficiency AC Extra Low Noise (SE AC XLN)

Sound Power Levels Standard Efficiency AC Extra Low Noise SE AC XLN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 88,8 90,3 85,2 85,2 80,0 72,0 66,2 88 dB(A) 105 91,7 92,3 88,1 84,9 78,4 73,4 68,9 89 dB(A) 125 91,0 92,4 87,7 85,2 79,1 73,1 68,4 89 dB(A) 140 90,7 92,6 87,4 85,4 79,4 73,1 68,3 89 dB(A) 145 90,7 92,6 87,4 85,4 79,4 73,1 68,3 89 dB(A) 150 88,7 91,3 87,7 87,6 82,2 71,4 66,2 90 dB(A) 155 88,7 91,3 87,7 87,6 82,2 71,4 66,2 90 dB(A) 170 89,9 91,4 89,0 87,2 80,1 72,6 67,4 90 dB(A) 175 89,9 91,4 89,0 87,2 80,1 72,6 67,4 90 dB(A) 185 89,3 91,4 89,3 88,7 82,7 72,1 66,8 91 dB(A) 190 89,3 91,4 89,3 88,7 82,7 72,1 66,8 91 dB(A) 200 90,2 91,4 90,2 88,4 80,9 73,0 67,7 91 dB(A) 205 90,2 91,4 90,2 88,4 80,9 73,0 67,7 91 dB(A) 250 90,1 96,4 87,9 90,6 85,2 72,7 67,2 93 dB(A) 280 88,9 93,9 91,6 92,7 83,1 73,9 66,0 94 dB(A) 310 88,4 94,1 91,2 92,8 83,0 73,8 65,6 94 dB(A) 350 87,6 97,1 88,6 91,7 86,2 72,2 67,2 95 dB(A) 355 96,0 100,0 94,0 95,0 91,0 84,0 80,0 100 dB(A) 380 88,3 95,2 91,7 94,0 83,7 74,4 65,3 95 dB(A) 410 87,7 95,1 91,7 94,0 83,7 74,2 64,5 96 dB(A) 450 97,0 101,0 95,0 96,0 92,0 86,0 82,0 100 dB(A)

Page 12: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

1.6 SOUND POWER LEVELS RTAF Standard Efficiency Extra Low Noise Night Noise Setback (SE XLN+NNSB)

Sound Power Levels Standard Efficiency Extra Low Noise Night Noise Setback SE XLN+NNSB

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 82,3 83,8 79,8 82,2 77,2 66,7 56,5 85 dB(A) 105 87,4 85,3 84,7 81,8 74,5 67,2 60,4 86 dB(A) 125 85,7 86,6 83,7 82,2 75,7 66,9 59,3 86 dB(A) 145 84,9 87,3 82,9 82,4 76,3 66,8 59,0 86 dB(A) 155 81,2 85,3 83,3 84,1 78,9 64,2 55,8 87 dB(A) 175 83,1 84,5 85,1 83,9 76,4 66,0 57,7 87 dB(A) 190 82,0 84,9 85,2 85,2 79,2 65,3 56,8 88 dB(A) 205 83,3 83,7 86,4 85,0 77,1 66,5 58,2 88 dB(A) 250 85,5 92,9 84,9 87,8 82,3 67,6 60,0 91 dB(A) 280 83,6 89,9 88,7 89,8 80,2 69,5 56,3 92 dB(A) 310 83,1 90,2 88,3 89,9 80,0 69,5 55,5 92 dB(A) 350 81,8 93,8 85,6 88,8 83,3 67,4 61,3 92 dB(A) 380 83,0 91,6 88,7 91,1 80,8 70,4 55,2 93 dB(A) 410 82,6 91,6 88,7 91,1 80,8 70,4 55,1 93 dB(A)

Page 13: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

2. SOUND POWER LEVELS RTAF High Efficiency (HE)

2.1 SOUND POWER LEVELS RTAF High Efficiency Standard Noise (HE SN)

Sound Power Levels High Efficiency Standard Noise HE SN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 90,8 92,2 89,7 92,3 87,0 76,6 68,9 95 dB(A) 105 93,0 92,4 91,9 92,1 84,2 76,4 69,5 95 dB(A) 125 92,7 94,4 92,3 93,1 86,6 77,3 69,8 96 dB(A) 145 91,8 94,9 91,9 93,1 87,3 77,3 69,6 96 dB(A) 155 90,4 93,4 92,1 94,1 90,0 76,8 68,7 97 dB(A) 175 91,0 93,5 93,3 94,5 87,8 76,8 69,2 97 dB(A) 190 90,7 92,8 93,7 95,4 90,4 77,1 69,3 98 dB(A) 205 91,2 92,7 94,5 95,6 88,6 77,0 69,6 98 dB(A) 250 93,4 95,4 94,7 97,1 88,3 76,8 66,7 99 dB(A) 280 92,1 95,6 96,5 98,0 88,9 77,3 67,0 100 dB(A) 310 92,4 96,3 96,9 99,1 90,2 77,9 66,9 101 dB(A) 350 92,7 96,7 96,7 99,2 89,8 77,7 65,9 101 dB(A) 355 98,0 99,0 96,0 96,0 94,0 89,0 86,0 101 dB(A) 380 93,4 97,6 97,7 100,2 90,8 78,6 66,0 102 dB(A) 410 93,2 97,6 97,7 100,2 90,8 78,4 65,1 102 dB(A) 450 98,0 100,0 97,0 97,0 95,0 90,0 87,0 102 dB(A)

2.2 SOUND POWER LEVELS RTAF High Efficiency Low Noise (HE LN)

Sound Power Levels High Efficiency Low Noise HE LN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 90,7 91,5 88,9 90,2 83,4 75,1 68,4 93 dB(A) 105 91,6 91,4 90,4 89,9 81,8 74,8 68,6 93 dB(A) 125 90,8 92,3 90,0 89,9 82,3 74,6 68,1 93 dB(A) 145 90,2 92,8 89,6 90,0 82,7 74,5 67,9 93 dB(A) 155 89,9 92,2 90,4 91,1 85,1 74,5 67,7 94 dB(A) 175 89,4 91,5 90,4 91,6 83,4 74,0 67,3 94 dB(A) 190 89,9 91,4 91,2 92,6 85,5 74,7 67,8 95 dB(A) 205 89,6 90,9 91,2 92,9 84,3 74,3 67,6 95 dB(A) 250 90,3 95,0 91,5 93,9 84,6 74,9 65,3 96 dB(A) 280 88,5 95,1 93,4 94,9 85,2 75,3 65,5 97 dB(A) 310 88,7 96,2 93,7 96,1 86,1 76,1 65,8 98 dB(A) 350 88,5 96,7 93,6 96,1 85,8 76,1 65,4 98 dB(A) 355 98,0 99,0 95,0 95,0 93,0 85,0 79,0 100 dB(A) 380 88,0 96,7 93,6 96,1 85,8 76,0 64,7 98 dB(A) 410 88,5 97,7 94,6 97,1 86,8 76,9 65,1 99 dB(A) 450 98,0 100,0 96,0 96,0 94,0 86,0 80,0 101 dB(A)

Page 14: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

2.3 Sound Power Levels High Efficiency AC Extra Low Noise (HE AC XLN)

Sound Power Levels High Efficiency AC Extra Low Noise HE AC XLN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 87,8 89,7 84,9 85,6 80,4 71,6 65,1 90 dB(A) 105 90,3 90,8 87,3 84,1 77,4 72,0 67,3 90 dB(A) 125 89,9 91,3 86,7 84,3 78,1 72,0 67,2 90 dB(A) 145 90,5 92,5 87,3 85,5 79,5 72,9 68,0 90 dB(A) 155 89,2 91,5 87,7 87,5 82,1 71,7 66,7 90 dB(A) 175 90,3 91,7 89,0 87,1 80,1 72,9 67,8 90 dB(A) 190 89,7 91,7 89,3 88,6 82,6 72,4 67,2 91 dB(A) 205 90,6 91,7 90,2 88,3 80,9 73,3 68,1 91 dB(A) 250 90,1 96,4 87,9 90,6 85,2 72,7 67,2 92 dB(A) 280 88,9 93,9 91,6 92,7 83,1 73,9 66,0 93 dB(A) 310 89,4 95,1 92,2 93,8 84,0 74,8 66,6 94 dB(A) 350 88,6 98,1 89,6 92,7 87,2 73,2 68,2 94 dB(A) 355 96,0 100,0 94,0 95,0 91,0 84,0 80,0 99 dB(A) 380 88,3 95,2 91,7 94,0 83,7 74,4 65,3 94 dB(A) 410 87,7 95,1 91,7 94,0 83,7 74,2 64,5 95 dB(A) 450 97,0 101,0 95,0 96,0 92,0 86,0 82,0 100 dB(A)

3. SOUND POWER LEVELS RTAF Extra Efficiency (XE)

3.1 SOUND POWER LEVELS RTAF Extra Efficiency Standard Noise (XE SN)

Sound Power Levels Extra Efficiency Standard Noise XE SN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 87,3 90,5 88,2 91,3 86,8 76,3 69,1 94 dB(A) 105 91,2 90,7 91,3 91,0 83,6 76,2 70,0 94 dB(A) 125 90,9 93,3 91,5 91,9 86,1 77,4 71,2 95 dB(A) 145 90,7 94,9 92,0 92,9 87,7 78,4 72,0 96 dB(A) 155 89,9 93,3 92,3 94,0 90,1 78,1 71,7 97 dB(A) 175 90,5 93,5 93,5 94,3 88,0 78,2 72,2 97 dB(A) 190 90,2 92,7 93,8 95,3 90,5 78,4 72,2 98 dB(A) 205 90,7 92,6 94,7 95,5 88,7 78,4 72,5 98 dB(A) 250 93,3 95,3 94,8 97,0 88,4 77,7 70,0 99 dB(A) 280 91,9 95,6 96,6 97,9 88,9 78,0 69,8 100 dB(A) 310 92,2 96,3 96,9 99,1 90,3 78,7 70,0 101 dB(A) 350 92,5 96,7 96,8 99,2 89,8 78,4 69,5 101 dB(A) 355 98,0 99,0 96,0 96,0 94,0 89,0 86,0 101 dB(A) 380 93,3 97,6 97,7 100,2 90,8 79,2 69,5 102 dB(A) 410 93,1 97,6 97,7 100,2 90,8 78,9 68,6 102 dB(A) 415 94,1 98,6 98,7 101,2 91,8 79,9 69,6 103 dB(A) 450 98,0 100,0 97,0 97,0 95,0 90,0 87,0 102 dB(A)

Page 15: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

3.2 SOUND POWER LEVELS RTAF Extra Efficiency Low Noise (XE LN)

Sound Power Levels Extra Efficiency Low Noise XE LN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 87,3 89,4 86,9 88,1 82,4 74,4 68,5 91 dB(A) 105 89,1 89,1 89,1 87,4 80,2 74,1 68,8 91 dB(A) 125 89,0 91,4 89,4 88,6 81,9 75,2 69,9 92 dB(A) 145 89,2 93,0 90,0 89,7 83,2 76,1 70,7 93 dB(A) 155 89,4 92,1 90,7 90,9 85,4 76,4 71,0 94 dB(A) 175 88,9 91,4 90,6 91,5 83,8 75,8 70,5 94 dB(A) 190 89,5 91,3 91,5 92,4 85,8 76,4 71,1 95 dB(A) 205 89,1 90,8 91,4 92,8 84,6 76,1 70,7 95 dB(A) 250 90,1 95,0 91,6 93,8 84,7 75,8 68,3 96 dB(A) 280 88,2 95,1 93,5 94,8 85,3 76,1 68,2 97 dB(A) 310 88,3 96,2 93,8 96,0 86,2 76,8 68,6 98 dB(A) 350 88,2 96,7 93,7 96,0 85,9 76,8 68,2 98 dB(A) 355 98,0 99,0 95,0 95,0 93,0 85,0 79,0 100 dB(A) 380 87,7 96,7 93,6 96,1 85,9 76,6 67,4 98 dB(A) 410 88,3 97,7 94,6 97,1 86,8 77,4 67,7 99 dB(A) 415 88,3 97,7 94,6 97,1 86,8 77,4 67,7 100 dB(A) 450 98,0 100,0 96,0 96,0 94,0 86,0 80,0 101 dB(A)

3.3 SOUND POWER LEVELS RTAF Extra Efficiency Low Noise Night Noise Setback (XE LN+NNSB)

Sound Power Levels Extra Efficiency Low Noise Night Noise Setback XE LN+NNSB

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 82,9 88,2 84,6 87,4 82,4 71,6 59,6 90 dB(A) 105 86,8 86,8 87,9 85,3 77,7 69,6 61,0 89 dB(A) 125 85,0 90,0 87,7 86,6 80,0 70,3 60,5 90 dB(A) 145 82,2 90,9 86,8 86,7 80,6 70,2 60,0 90 dB(A) 155 80,9 88,7 87,3 88,1 83,2 69,6 58,7 91 dB(A) 175 80,9 87,5 87,3 88,9 80,8 69,0 59,4 91 dB(A) 190 81,2 86,6 88,2 89,8 83,2 69,6 59,9 92 dB(A) 205 80,9 85,7 88,1 90,2 81,5 69,1 59,8 92 dB(A) 250 86,8 93,0 89,4 92,0 82,5 72,0 58,5 94 dB(A) 280 83,6 93,0 91,4 92,9 83,1 72,6 59,7 95 dB(A) 310 83,4 94,2 91,6 94,1 84,0 73,4 59,6 96 dB(A) 350 83,4 94,7 91,5 94,1 83,7 73,5 58,8 96 dB(A) 380 83,3 94,7 91,5 94,1 83,7 73,5 58,6 96 dB(A) 410 84,2 95,7 92,5 95,1 84,7 74,5 59,5 97 dB(A) 415 84,2 95,7 92,5 95,1 84,7 74,5 59,5 97 dB(A)

Page 16: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

3.4 SOUND POWER LEVELS RTAF Extra Efficiency Extra Low Noise (XE XLN)

Sound Power Levels Extra Efficiency Extra Low Noise XE XLN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 86,8 88,7 83,9 84,6 79,4 70,6 64,1 88 dB(A) 105 89,3 89,8 86,3 83,1 76,4 71,0 66,3 88 dB(A) 125 88,9 90,3 85,7 83,3 77,1 71,0 66,2 88 dB(A) 145 89,5 91,5 86,3 84,5 78,5 71,9 67,0 89 dB(A) 155 88,2 90,5 86,7 86,5 81,1 70,7 65,7 90 dB(A) 175 89,3 90,7 88,0 86,1 79,1 71,9 66,8 90 dB(A) 190 88,7 90,7 88,3 87,6 81,6 71,4 66,2 91 dB(A) 205 89,6 90,7 89,2 87,3 79,9 72,3 67,1 91 dB(A) 250 89,1 95,4 86,9 89,6 84,2 71,7 66,2 93 dB(A) 280 87,9 92,9 90,6 91,7 82,1 72,9 65,0 94 dB(A) 310 88,4 94,1 91,2 92,8 83,0 73,8 65,6 95 dB(A) 350 87,6 97,1 88,6 91,7 86,2 72,2 67,2 95 dB(A) 355 95,0 99,0 93,0 94,0 90,0 83,0 79,0 99 dB(A) 380 87,3 94,2 90,7 93,0 82,7 73,4 64,3 95 dB(A) 410 86,7 94,1 90,7 93,0 82,7 73,2 63,5 95 dB(A) 450 96,0 100,0 94,0 95,0 91,0 85,0 81,0 100 dB(A)

3.5 SOUND POWER LEVELS RTAF Extra Efficiency Extra Low Noise Night Noise Setback (XE XLN+NNSB)

Sound Power Levels Extra Efficiency Low Noise Extra Night Noise Setback XE XLN+NNSB

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 81,6 84,4 80,5 83,4 78,3 67,4 55,2 86 dB(A) 105 86,6 85,1 84,7 81,9 74,5 67,0 59,9 86 dB(A) 125 84,3 85,5 82,6 81,3 74,8 65,7 57,7 85 dB(A) 145 84,3 87,2 82,9 82,5 76,3 66,6 58,3 86 dB(A) 155 81,3 85,2 83,2 84,2 78,9 64,1 55,2 87 dB(A) 175 83,6 84,6 85,1 83,9 76,4 66,2 58,1 87 dB(A) 190 82,5 85,0 85,2 85,2 79,1 65,4 57,2 88 dB(A) 205 83,7 83,8 86,4 85,0 77,1 66,6 58,5 88 dB(A) 250 85,5 92,9 84,9 87,8 82,3 67,6 60,0 91 dB(A) 280 83,6 89,9 88,7 89,8 80,2 69,5 56,3 92 dB(A) 310 84,1 91,2 89,3 90,9 81,0 70,5 56,5 93 dB(A) 350 82,8 94,8 86,6 89,8 84,3 68,4 62,3 93 dB(A) 380 83,0 91,6 88,7 91,1 80,8 70,4 55,2 93 dB(A) 410 82,6 91,6 88,7 91,1 80,8 70,4 55,1 93 dB(A)

Page 17: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

4. SOUND POWER LEVELS RTAF High Seasonal Efficiency (HSE)

4.1 SOUND POWER LEVELS RTAF High Seasonal Efficiency Standard Noise (HSE SN)

Sound Power Levels High Seasonal Efficiency Standard Noise HSE SN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 87,3 90,5 88,2 91,3 86,8 76,3 69,1 94 dB(A) 105 91,2 90,7 91,3 91,0 83,6 76,2 70,0 94 dB(A) 125 90,9 93,3 91,5 91,9 86,1 77,4 71,2 95 dB(A) 145 90,7 94,9 92,0 92,9 87,7 78,4 72,0 96 dB(A) 155 89,9 93,3 92,3 94,0 90,1 78,1 71,7 98 dB(A) 175 90,5 93,5 93,5 94,3 88,0 78,2 72,2 98 dB(A) 190 90,2 92,7 93,8 95,3 90,5 78,4 72,2 99 dB(A) 205 90,7 92,6 94,7 95,5 88,7 78,4 72,5 99 dB(A) 245 91,6 104,2 101,1 97,2 96,3 85,2 76,1 104 dB(A) 250 93,3 95,3 94,8 97,0 88,4 77,7 70,0 99 dB(A) 280 91,9 95,6 96,6 97,9 88,9 78,0 69,8 100 dB(A) 310 92,2 96,3 96,9 99,1 90,3 78,7 70,0 101 dB(A) 350 92,5 96,7 96,8 99,2 89,8 78,4 69,5 101 dB(A) 370 102,0 102,0 97,0 99,0 95,0 95,0 92,0 104 dB(A) 380 93,3 97,6 97,7 100,2 90,8 79,2 69,5 102 dB(A) 400 100,0 101,0 101,0 101,0 100,0 93,0 90,0 107 dB(A) 410 93,1 97,6 97,7 100,2 90,8 78,9 68,6 102 dB(A) 450 97,4 102,4 102,7 105,3 95,8 83,1 66,7 107 dB(A) 510 102,0 102,0 98,0 99,0 96,0 96,0 93,0 104 dB(A) 550 101,0 102,0 102,0 101,0 101,0 94,0 91,0 107 dB(A)

Page 18: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

4.2 SOUND POWER LEVELS RTAF High Seasonal Efficiency Low Noise (HSE LN)

Sound Power Levels High Seasonal Efficiency Low Noise HSE LN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 87,3 89,4 86,9 88,1 82,4 74,4 68,5 91 dB(A) 105 89,1 89,1 89,1 87,4 80,2 74,1 68,8 91 dB(A) 125 89,0 91,4 89,4 88,6 81,9 75,2 69,9 92 dB(A) 145 89,2 93,0 90,0 89,7 83,2 76,1 70,7 93 dB(A) 155 89,4 92,1 90,7 90,9 85,4 76,4 71,0 95 dB(A) 175 88,9 91,4 90,6 91,5 83,8 75,8 70,5 95 dB(A) 190 89,5 91,3 91,5 92,4 85,8 76,4 71,1 96 dB(A) 205 89,1 90,8 91,4 92,8 84,6 76,1 70,7 96 dB(A) 245 90,7 102,4 99,1 93,1 91,3 81,6 73,9 101 dB(A) 250 90,1 95,0 91,6 93,8 84,7 75,8 68,3 96 dB(A) 280 88,2 95,1 93,5 94,8 85,3 76,1 68,2 97 dB(A) 310 88,3 96,2 93,8 96,0 86,2 76,8 68,6 98 dB(A) 350 88,2 96,7 93,7 96,0 85,9 76,8 68,2 98 dB(A) 370 101,0 101,0 97,0 98,0 96,0 87,0 81,0 103 dB(A) 380 87,7 96,7 93,6 96,1 85,9 76,6 67,4 98 dB(A) 400 100,0 100,0 103,0 102,0 100,0 88,0 82,0 107 dB(A) 410 88,3 97,7 94,6 97,1 86,8 77,4 67,7 99 dB(A) 450 91,5 102,7 99,5 102,1 91,7 81,6 68,3 104 dB(A) 510 102,0 102,0 98,0 99,0 97,0 88,0 82,0 104 dB(A) 550 101,0 101,0 103,0 102,0 101,0 89,0 83,0 107 dB(A)

Page 19: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

4.3 SOUND POWER LEVELS RTAF High Seasonal Efficiency Low Noise Night Noise Setback (HSE LN+NNSB)

Sound Power Levels High Seasonal Efficiency Low Noise Night Noise Setback HSE LN+NNSB

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 82,9 88,2 84,6 87,4 82,4 71,6 59,6 90 dB(A) 105 86,8 86,8 87,9 85,3 77,7 69,6 61,0 89 dB(A) 125 85,0 90,0 87,7 86,6 80,0 70,3 60,5 90 dB(A) 145 82,2 90,9 86,8 86,7 80,6 70,2 60,0 90 dB(A) 155 80,9 88,7 87,3 88,1 83,2 69,6 58,7 91 dB(A) 175 80,9 87,5 87,3 88,9 80,8 69,0 59,4 91 dB(A) 190 81,2 86,6 88,2 89,8 83,2 69,6 59,9 92 dB(A) 205 80,9 85,7 88,1 90,2 81,5 69,1 59,8 92 dB(A) 250 87,8 94,0 90,4 93,0 83,5 73,0 59,5 95 dB(A) 280 84,6 94,0 92,4 93,9 84,1 73,6 60,7 96 dB(A) 310 84,4 95,2 92,6 95,1 85,0 74,4 60,6 97 dB(A) 350 84,4 95,7 92,5 95,1 84,7 74,5 59,8 97 dB(A) 380 84,3 95,7 92,5 95,1 84,7 74,5 59,6 97 dB(A) 410 85,2 96,7 93,5 96,1 85,7 75,5 60,5 98 dB(A)

Page 20: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

4.4 SOUND POWER LEVELS RTAF High Seasonal Efficiency Extra Low Noise (HSE XLN)

Sound Power Levels High Seasonal Efficiency Extra Low Noise HSE XLN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 86,8 88,7 83,9 84,6 79,4 70,6 64,1 88 dB(A) 105 89,3 89,8 86,3 83,1 76,4 71,0 66,3 88 dB(A) 125 88,9 90,3 85,7 83,3 77,1 71,0 66,2 88 dB(A) 145 89,5 91,5 86,3 84,5 78,5 71,9 67,0 89 dB(A) 155 88,2 90,5 86,7 86,5 81,1 70,7 65,7 91 dB(A) 175 89,3 90,7 88,0 86,1 79,1 71,9 66,8 91 dB(A) 190 88,7 90,7 88,3 87,6 81,6 71,4 66,2 92 dB(A) 205 89,6 90,7 89,2 87,3 79,9 72,3 67,1 92 dB(A) 245 90,6 98,5 95,1 89,6 87,1 77,3 69,6 97 dB(A) 250 89,1 95,4 86,9 89,6 84,2 71,7 66,2 93 dB(A) 280 87,9 92,9 90,6 91,7 82,1 72,9 65,0 94 dB(A) 310 88,4 94,1 91,2 92,8 83,0 73,8 65,6 95 dB(A) 350 87,6 97,1 88,6 91,7 86,2 72,2 67,2 95 dB(A) 370 100,0 101,0 96,0 95,0 93,0 87,0 83,0 101 dB(A) 380 87,3 94,2 90,7 93,0 82,7 73,4 64,3 95 dB(A) 400 99,0 101,0 103,0 101,0 99,0 87,0 82,0 106 dB(A) 410 86,7 94,1 90,7 93,0 82,7 73,2 63,5 95 dB(A) 450 91,4 101,8 98,5 101,1 90,7 80,6 67,3 103 dB(A) 510 100,0 102,0 97,0 96,0 93,0 88,0 84,0 102 dB(A) 550 99,0 102,0 103,0 100,0 96,0 88,0 83,0 105 dB(A)

Page 21: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

4.5 SOUND POWER LEVELS RTAF High Seasonal Efficiency Extra Low Noise Night Noise Setback (HSE XLN+NNSB)

Sound Power Levels High Seasonal Efficiency Low Noise Night Noise Setback HSE XLN+NNSB

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 81,6 84,4 80,5 83,4 78,3 67,4 55,2 86 dB(A) 105 86,6 85,1 84,7 81,9 74,5 67,0 59,9 86 dB(A) 125 84,3 85,5 82,6 81,3 74,8 65,7 57,7 85 dB(A) 145 84,3 87,2 82,9 82,5 76,3 66,6 58,3 86 dB(A) 155 81,3 85,2 83,2 84,2 78,9 64,1 55,2 87 dB(A) 175 83,6 84,6 85,1 83,9 76,4 66,2 58,1 87 dB(A) 190 82,5 85,0 85,2 85,2 79,1 65,4 57,2 88 dB(A) 205 83,7 83,8 86,4 85,0 77,1 66,6 58,5 88 dB(A) 250 85,5 92,9 84,9 87,8 82,3 67,6 60,0 91 dB(A) 280 83,6 89,9 88,7 89,8 80,2 69,5 56,3 92 dB(A) 310 84,1 91,2 89,3 90,9 81,0 70,5 56,5 93 dB(A) 350 82,8 94,8 86,6 89,8 84,3 68,4 62,3 93 dB(A) 380 83,0 91,6 88,7 91,1 80,8 70,4 55,2 93 dB(A) 410 82,6 91,6 88,7 91,1 80,8 70,4 55,1 93 dB(A)

Page 22: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

5. SOUND POWER LEVELS RTAF High Seasonal Efficiency Short (HSS)

5.1 SOUND POWER LEVELS RTAF High Seasonal Efficiency Short Standard Noise (HSS SN)

Sound Power Levels High Seasonal Efficiency Short Standard Noise HSS SN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 89,8 91,9 89,8 92,2 87,4 77,9 71,6 95 dB(A) 105 92,5 92,1 92,3 91,9 84,7 77,9 72,3 95 dB(A) 125 91,0 93,3 91,6 91,9 86,0 77,6 71,5 95 dB(A) 140 91,0 94,9 92,1 92,9 87,6 78,6 72,4 96 dB(A) 145 91,0 94,9 92,1 92,9 87,6 78,6 72,4 96 dB(A) 150 88,4 92,2 91,2 93,0 89,2 76,8 70,2 96 dB(A) 155 88,4 92,2 91,2 93,0 89,2 76,8 70,2 96 dB(A) 170 90,1 93,3 93,5 94,4 88,1 77,9 71,7 97 dB(A) 175 90,1 93,3 93,5 94,4 88,1 77,9 71,7 97 dB(A) 185 88,7 91,5 92,8 94,3 89,5 77,1 70,7 97 dB(A) 190 88,7 91,5 92,8 94,3 89,5 77,1 70,7 97 dB(A) 200 89,2 91,4 93,6 94,6 87,7 77,2 71,1 97 dB(A) 205 89,2 91,4 93,6 94,6 87,7 77,2 71,1 97 dB(A) 245 91,6 104,2 101,1 97,2 96,3 85,2 76,1 104 dB(A) 250 93,3 95,3 94,8 97,0 88,4 77,7 70,0 99 dB(A) 280 91,9 95,6 96,6 97,9 88,9 78,0 69,8 100 dB(A) 310 92,2 96,3 96,9 99,1 90,3 78,7 70,0 101 dB(A) 350 92,5 96,7 96,8 99,2 89,8 78,4 69,5 101 dB(A) 380 92,3 96,6 96,7 99,2 89,8 78,2 68,5 101 dB(A) 410 93,1 97,6 97,7 100,2 90,8 78,9 68,6 102 dB(A)

Page 23: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

5.2 SOUND POWER LEVELS RTAF High Seasonal Efficiency Short Low Noise (HSS LN)

Sound Power Levels High Seasonal Efficiency Short Low Noise HSS LN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 89,0 90,4 88,3 88,9 83,0 75,9 70,6 92 dB(A) 105 90,2 90,3 89,9 88,5 81,4 75,7 70,8 92 dB(A) 125 89,2 91,3 89,4 88,6 81,9 75,3 70,1 92 dB(A) 140 89,5 92,9 90,0 89,7 83,2 76,3 71,0 93 dB(A) 145 89,5 92,9 90,0 89,7 83,2 76,3 71,0 93 dB(A) 150 88,0 91,1 89,6 89,9 84,5 75,1 69,6 93 dB(A) 155 88,0 91,1 89,6 89,9 84,5 75,1 69,6 93 dB(A) 170 88,5 91,3 90,6 91,5 83,7 75,5 70,1 94 dB(A) 175 88,5 91,3 90,6 91,5 83,7 75,5 70,1 94 dB(A) 185 88,1 90,2 90,4 91,5 84,8 75,1 69,7 94 dB(A) 190 88,1 90,2 90,4 91,5 84,8 75,1 69,7 94 dB(A) 200 87,8 89,6 90,4 91,8 83,6 74,8 69,3 94 dB(A) 205 87,8 89,6 90,4 91,8 83,6 74,8 69,3 94 dB(A) 245 90,7 102,4 99,1 93,1 91,3 81,6 73,9 101 dB(A) 250 90,1 95,0 91,6 93,8 84,7 75,8 68,3 96 dB(A) 280 88,2 95,1 93,5 94,8 85,3 76,1 68,2 97 dB(A) 310 88,3 96,2 93,8 96,0 86,2 76,8 68,6 98 dB(A) 350 88,2 96,7 93,7 96,0 85,9 76,8 68,2 98 dB(A) 380 87,7 96,7 93,6 96,1 85,9 76,6 67,4 98 dB(A) 410 88,3 97,7 94,6 97,1 86,8 77,4 67,7 99 dB(A)

Page 24: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

5.3 SOUND POWER LEVELS RTAF High Seasonal Efficiency Short Low Noise Night Noise Setback (HSS LN+NNSB)

Sound Power Levels High Seasonal Efficiency Short Low Noise Night Noise Setback HSS LN+NNSB

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 82,6 87,2 83,7 86,4 81,3 70,9 59,9 89 dB(A) 105 86,9 86,8 87,9 85,3 77,7 69,6 60,7 89 dB(A) 125 84,0 89,0 86,7 85,6 79,0 69,3 59,5 89 dB(A) 145 82,3 90,9 86,8 86,7 80,6 70,3 60,1 90 dB(A) 155 80,2 87,7 86,3 87,1 82,2 68,7 58,4 90 dB(A) 175 80,6 87,5 87,3 88,9 80,8 68,9 59,1 91 dB(A) 190 80,0 85,6 87,2 88,8 82,2 68,5 58,7 91 dB(A) 205 79,7 84,7 87,1 89,2 80,5 68,0 58,6 91 dB(A) 250 86,8 93,0 89,4 92,0 82,5 72,0 58,5 94 dB(A) 280 83,6 93,0 91,4 92,9 83,1 72,6 59,7 95 dB(A) 310 83,4 94,2 91,6 94,1 84,0 73,4 59,6 96 dB(A) 350 83,4 94,7 91,5 94,1 83,7 73,5 58,8 96 dB(A) 380 83,3 94,7 91,5 94,1 83,7 73,5 58,6 96 dB(A) 410 84,2 95,7 92,5 95,1 84,7 74,5 59,5 97 dB(A)

5.4 SOUND POWER LEVELS RTAF High Seasonal Efficiency Short Extra Low Noise (HSS XLN)

Sound Power Levels High Seasonal Efficiency Short Extra Low Noise HSS XLN

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 87,8 89,3 84,2 84,2 79,0 71,0 65,2 88 dB(A) 105 90,7 91,3 87,1 83,9 77,4 72,4 67,9 89 dB(A) 125 90,0 91,4 86,7 84,2 78,1 72,1 67,4 89 dB(A) 140 89,7 91,6 86,4 84,4 78,4 72,1 67,3 89 dB(A) 145 89,7 91,6 86,4 84,4 78,4 72,1 67,3 89 dB(A) 155 87,7 90,3 86,7 86,6 81,2 70,4 65,2 90 dB(A) 175 88,9 90,4 88,0 86,2 79,1 71,6 66,4 90 dB(A) 190 88,3 90,4 88,3 87,7 81,7 71,1 65,8 91 dB(A) 205 89,2 90,4 89,2 87,4 79,9 72,0 66,7 91 dB(A) 245 90,6 98,5 95,1 89,6 87,1 77,3 69,6 97 dB(A) 250 89,1 95,4 86,9 89,6 84,2 71,7 66,2 93 dB(A) 280 87,9 92,9 90,6 91,7 82,1 72,9 65,0 94 dB(A) 310 87,4 93,1 90,2 91,8 82,0 72,8 64,6 94 dB(A) 350 86,6 96,1 87,6 90,7 85,2 71,2 66,2 94 dB(A) 380 87,3 94,2 90,7 93,0 82,7 73,4 64,3 95 dB(A) 410 86,7 94,1 90,7 93,0 82,7 73,2 63,5 95 dB(A)

Page 25: Engineering bulletin - ComfortSite · March 2017 RLC-PRB039C-GB . Engineering bulletin Sound ratings and installation guide Air-cooled screw chiller model RTAF

5.5 SOUND POWER LEVELS RTAF High Seasonal Efficiency Short Extra Low Noise Night Noise Setback (HSS XLN+NNSB)

Sound Power Levels High Seasonal Efficiency Short Low Noise Night Noise Setback HSS XLN+NNSB

RTAF FREQUENCY 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz dB(A)

90 82,3 83,8 79,8 82,2 77,2 66,7 56,5 85 dB(A) 105 87,4 85,3 84,7 81,8 74,5 67,2 60,4 86 dB(A) 125 85,7 86,6 83,7 82,2 75,7 66,9 59,3 86 dB(A) 145 84,9 87,3 82,9 82,4 76,3 66,8 59,0 86 dB(A) 155 81,2 85,3 83,3 84,1 78,9 64,2 55,8 87 dB(A) 175 83,1 84,5 85,1 83,9 76,4 66,0 57,7 87 dB(A) 190 82,0 84,9 85,2 85,2 79,2 65,3 56,8 88 dB(A) 205 83,3 83,7 86,4 85,0 77,1 66,5 58,2 88 dB(A) 250 85,5 92,9 84,9 87,8 82,3 67,6 60,0 91 dB(A) 280 83,6 89,9 88,7 89,8 80,2 69,5 56,3 92 dB(A) 310 83,1 90,2 88,3 89,9 80,0 69,5 55,5 92 dB(A) 350 81,8 93,8 85,6 88,8 83,3 67,4 61,3 92 dB(A) 380 83,0 91,6 88,7 91,1 80,8 70,4 55,2 93 dB(A) 410 82,6 91,6 88,7 91,1 80,8 70,4 55,1 93 dB(A)

Trane optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, the leader in creating and sustaining safe, comfortable and energy efficient environments, Trane offers a broad portfolio of advanced controls and HVAC systems, comprehensive building services, and parts. For more information, visit www.Trane.com.

Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.

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