Slx whisper faq (03 2011)-en

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SLX WhisperpMalcolm MilesService Application SpecialistIngersoll Rand Climate Solutions - EMEIA

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SLX Whisper Piek CertifiedThe demand for low sound equipment is increasing

• Our end customers are asking the refrigerated transport sector toOur end customers are asking the refrigerated transport sector to provide quieter equipment

• SLX Whisper is the Thermo King answer: it combines• SLX Whisper is the Thermo King answer: it combines • Reliable operation and maximum guarantees on quality of goods transported ( bl t t i hi h d)(able to operate in high speed)

• Optimum installation and operation cost

• And lower sound level (attaining PIEK certification whilst operating on engine high speed)

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SLX Whisper Piek CertifiedHigh Performance, Low Sound Level

The Unique Monobloc Low Noise Trailer Refrigeration Unit e U que o ob oc o o se a e e ge at o U tavailable on the Market for all load conditions

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What is PIEK?• Dutch certification scheme for vehicles

and equipment suitable for use in low noise night time deliveriesg

• Piek rules are:

7AM – 7PM 7PM – 11PM –

All readings at 7.5m from source and at high speed

7AM 7PM 11PM 7AMNo

Restriction 65 dB(A) 60 dB(A)All readings at 7.5m from source and at high speed

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Sound Levels

SLX Whisper

High Speed 59 dBA

SLX 200 & SLX 300SLX 200 & SLX 300

High Speed 70 dBA

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High speedLow speed 1250

1450

1250

1550

1250

1550

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SLX Whisper = Unique BenefitsMonobloc

• Competition = Engine fitted inside a remote compartmentCo pet t o g e tted s de a e ote co pa t e tHigher Installation CostHigher Maintenance Cost

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SLX Whisper Piek CertifiedMaterial Available

• Frequently Asked Questionseque t y s ed Quest o sConsiderations to take into account when designing theinstallation of the SLX Whisper unit

• Installation manual, this is appended to the standard SLXinstallation manualinstallation manual

• Parts manual in Service Parts Catalogue CDg

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Question: What is supplied by Thermo King?All of the parts required to install the exhaust to the unit. This includes:

• Exhaust tubing

• Support brackets

• Exhaust cover for routing underneath the body

• Insulation pads

• Insulation socks

• Muffler

• Exhaust clamps

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• Exhaust clamps

Question: What is the position of the exhaust outlet from the unit?

390mm

Outside of unit mounting bolt hole back plate

390mm

110mmUnit mounting bolt hole centre

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Chassis trailers that afford clearance th h t b f t d

Question: How is the exhaust routed from the front of the trailer?

the exhaust can be surface mounted

chassis

Chassis-less trailers , or very shallow , ychassis will have to have channel recessed on underside of floor

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•Chassis trailers that afford clearance the exhaust can be surface mounted

•Chassis-less trailers , or very shallow chassis will have to have channel recessed on underside of floor.

•The exhaust has an insulating wrap around it to protect against contact burns. •In this example the OEM has provided a hole

for the exhaust to pass through the front fold of the 5th wheel plate this was because

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routing around the outside corner was not possible

Question: Purpose of the insulation sock?

Velcro stripProvide heat barrier and thus reduce surface temperature around exhaust tubing (round + rectangle section)

Velcro strip.

g )

• Material = High temperature fibre glass matting

• Thickness = 5mm

Insulation sock.

• Thickness = 5mm

• Fixing method = Velcro strip.

• Installation = After the exhaust pipe assembly has been fully welded

Exhaust pipe

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Front wall designs are different depending on OEM

The type of SuzieThe type of Suzie connection will also need to be considered

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There are 5th wheel leading edges that vary on box design.

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Other various obstructions

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Some with chassis Or chassis-less

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Possibly obstaclesVarying depth of Chassis

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Question: How is the exhaust routed under the body?

The exhaust is routed either in a channel or surface mounted.•If surface mounted, it is highly recommended that the body builder attaches a kick strip plate to the underside of the floor. This will be a good base for the mounting of the exhaust brackets and simplify the installation It will also act as additional heatthe exhaust brackets and simplify the installation . It will also act as additional heat shielding for the floor.

•There is an insulation foam pad that is stuck to the floor of the box. This is Thermo King supplied.

•The exhaust is wrapped in an insulating sock. This is Thermo King supplied.

•There is then a cover placed over the exhaust. The cover is supplied by Thermo King for the surface mounting.

•If the exhaust is in a channel then the OEM will supply his own cover, it must be as open as possible to allow for heat dissipation.

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Aluminium ‘kick strip’ attached to the underside of the floorAides exhaust mounting and provides additional heat shielding

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Special bracket that supports andSpecial bracket that supports and clamps the exhaust and insulating sock.

Foam pad attached to floor offers insulation.insulation.

Exhaust also wrapped with insulation sock. This also protects against contact burns.burns.

Exhaust has cover but is open to underside and inside. This is to allow

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underside and inside. This is to allow good air circulation and aide heat dissipation.


Pictures show the finished installation of the surface mounted exhaust

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Question: How does the exhaust transit from round tube to rectangular and then back to round?

25mm x 50mm

Transition coupling for front of body Transition

coupling for rear f h t f 90º

under body box section

of exhaust for 90ºexit

Transition coupling for rear of exhaust forof exhaust for straight exit

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Question: How is the exhaust constructed?

All of the tube connections are welded, to provide the best sealing, with the exception of the front tube at the connection to the exhaust inside the engine compartment and the last connection to the muffler. These are connected and clamped with standard exhaust clamps, this will allow for system or unit repair/service accessibility as required.

Trailer with chassis and exhaust surface mounted

150 mm

Heat insulation pad

50 5mm~10mm air gap

50.5mm

50mm x 25mm x 2mm box section The tube is 38mm round at the front of the box section

box prior to routing under the body, wrapped with the insulation sock.

Also for ease of connection to the muffler it is converted back to round tube and again

Single ply insulation sock

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is converted back to round tube and again wrapped with the insulation sock


For chassis-less and shallow chassis trailers a channel will have to be formed into the floor of the body This will need to be lined with metal to offer heat shield protection to the three sidesthe body. This will need to be lined with metal to offer heat shield protection to the three sides of the channel .

This example shows the front of the 5th wheel plate has a cut-out for the exhaust. The previous pictures showed a hole cut into the plate. What option will depend on OEM design constraints.

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F d tt h d i id h lFoam pad attached inside channel offers insulation.

Exhaust also wrapped withExhaust also wrapped with insulation sock. This also protects against contact burns.

When exhaust exits the channel it is then installed the same as the

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surface mounted exhaust.


This shows the channel type exhaust where it was passed through the hole in the front

d th 5th h l l t Th h t f thand over the 5th wheel plate. The exhaust cover for the channel should be as open as possible to allow for air circulation and heat

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circulation and heat dissipation.

Question: How is the exhaust constructed?All of the tube connections are welded, to provide the best sealing, with the exception of the front tube at the connection to the exhaust inside the engine compartment and the last connection to the muffler. These are connected and clamped with standard exhaust clamps, this will allow for system or unit repair/service accessibility as required.

Heat insulation pad

Trailer without chassis and exhaust recessed into box floor

50.5mm

Heat insulation pad

~10mm air gap

Once the exhaust exits the channel it is constructed in 38mm round steel tube and wrapped with the insulation sock and fits into the 50.5mm cover.

50mm x 25mm x 2mm box section

The tube is 38mm round at the front of the box prior to routing under the body. Also wrapped with the

Single ply insulation sock

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y ppinsulation sock.

Question: How deep does the channel need to be?

An air gap each side and above the exhaust of 10mm is required for good air g p q gcirculation and heat dissipation.

Therefore the channel would need to be 100mm x 55mm.

Question: How long should the channel be?

The channel can be up to 4.5 metres, this being the maximum distance from the front wall of the trailer bodytrailer body.

The minimum length of channel will be determined by the swing clearance required by the tractor when coupled to the trailer.

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Max 4.5m

Question: Where can the muffler be positioned?The muffler can be positioned either longitudinally or transversely up to 4.5m from front wall of trailer bodywall of trailer body.

Note: The exhaust can be oriented any way but attention has to be considered for water ingress into the muffler and also the outlet of the muffler owing to fumes and heat.

Question: How heavy is the muffler?21 Kg

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Question: What are overall muffler dimensions ?

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Question: What is the area required to maintain a safe distance around the muffler?

Generally the space around the muffler should be a minimum of 75mm with an allowance for air circulation to help dissipate the heat.

If the muffler is to be surrounded by other equipment then more space may be necessary.

What distance from the exhaust outlet should be maintained by surrounding equipment?

600mm should be the clear distance. However some exhaust deposits discolouration may still occur at this distance.

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Question: What corrosion protection has the system been given?

• All of the tubing and fittings are manufactured with aluminised steel*• All of the tubing and fittings are manufactured with aluminised steel .

• The casing of the muffler is also aluminised steel• The main frame of the muffler is steel with 2 coats of heat & corrosion resistant paint.

Note: Take care when handling the muffler, as with all paint protection misuse can cause the paint to be scratched off.

• The exhaust support brackets and the surface mount exhaust cover is manufactured in Galfan steel and powder coated.

Th h t l i l t d t l• The exhaust clamps are zinc plated steel.

• In addition, any welds that are made will also be treated with high temperature exhaust paint during the installation process.p g p*Aluminised steel is steel that has been hot-dip coated both sides with aluminum-silicon alloy. This process assures a tight metallurgical bond between the steel and its aluminum coating, producing a material with a unique combination of properties possessed neither by steel nor by aluminum alone. It can withstand temperatures up to 800ºC.

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temperatures up to 800 C.

Question: What is the temperature of the exhaust?The exhaust temperature varies depending on where it is taken.p p g

The bare surface of the exhaust can be as high as 120ºC, if touched it will cause a skin burn on contact

With the insulation sock attached it can be as high as 90ºC, but if touched the temperature will beWith the insulation sock attached it can be as high as 90 C, but if touched the temperature will be noticed before a skin burn occurs. If held for any length of time a skin burn may occur.

The surface contact of the exhaust at the underside of the trailer body between the insulation pad and the body surface is up to 45ºC with a surface mounted exhaust (chassis type trailer) and up to 65ºC with a channel mounted exhaust (chassis-less type trailer).

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Question: What is the temperature of the exhaust?

Up to 65ºC with a channel mounted exhaust (chassis-less type trailer).Up to 65 C with a channel mounted exhaust (chassis less type trailer).

The picture below shows the temperature taken in a 30ºC ambient.

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Question: What is the temperature of the exhaust?

Once mounted inside a ventilated cover the temperature increases by approximately 10ºC

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Question: What is supplied by Thermo King?All of the parts required to install the exhaust to the unit. This includes: • Exhaust tubing• Clamps • Support brackets• Insulation socks• Insulation pads• Exhaust cover for routing underneath the body• Muffler

Q ti Wh t h ld th b d b ild l ?Question: What should the body builder supply?• The front covers for the exhaust and any covers for the muffler end where it leaves the body to

muffler. Note: Thermo King cannot supply these because all front walls and body to chassis differ by manufacturer, it would impossible to make one to fit all.

• Mounting points for the muffler.

• Kick strip on the underside of the body.

• Access for the channel if Chassis-less or shallow chassis

• Cover for the channel type installation allowing for air circulation and heat dissipation.

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Question: What is supplied by Thermo King

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Question: What should the body builder supply?

This is an example of a cover for the tubing from the body to the muffler.

The exhaust front cover in this example has holes to allow for air circulation and heat dissipation.

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Question: What should the body builder supply?Kick strip and mounted to the

b dbody

The exhaust cover for the channel should be as open as possible to allow for air circulation and heatMounting points for the muffler

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allow for air circulation and heat dissipation.

Mounting points for the muffler

Question: What should the body builder supply?

This is a more robust cover produced byThis is a more robust cover produced by Schmitz, this will also take some impacts.

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Question: What is different with the installation between this and a standard SLX?

There is no difference between this and the standard SLX with the exception of the additional exhaust .

During the installation there are some noise abatement soft panels that have to be pushed aside to gain access to the mounting bolts.

Question: What additional time is required to install the SLX qWhisper?

To mount the unit takes an additional 15 minutes because of the sound proofing having to be h d id b t t d f th itpushed aside, but not removed from the unit.

The remainder of the exhaust system will take an additional 6hrs to 8hrs over the normal installation time.

Additional time required therefore will be maximum of 8.0hrs.

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Question: What sound proofing has to removed to service and mount the unit?

1) None

2) Critical access2) Critical access points for service. and mounting are provided

3) There is no need to remove the soundremove the sound proofing

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Additional steel to

Question: Description of the factory fitted sound proofing

eliminate resonance

Lined with soundproofing material

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Any Questions?

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Thank you for your attention

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Date post:	20-Jan-2015
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Slx whisper faq (03 2011)-en

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