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Chiller Structural Foundation

Chiller Structural Foundation

(OP)
Hi, everyone.

I'm looking into the requirements that I should make to the structural engineer for the installation of a magnetic chiller in a roof.

After looking into thread507-299291: Equipment pad/foundation question? I'm understanding that if he provides a 6'' maintenance slab and I specify that the equipment is provided with vibration isolators a floating isolation slab isn't required. That would save him a lot of headaches due to the reduced weight. Could someone guide me to a resource for specifying chiller foundation?

Regards.
EloyRD

RE: Chiller Structural Foundation

2
You provide him the weight and what vibration isolation you will specify (varying isolators will still let varying vibrations through). Work with a vibration isolator manufacturer on what best product to use. It being outside (sunlight, water, freezing etc.) will limit the choices.

The rest is up to the structural engineer. He is responsible to build the structure to survive the residual vibration from your equipment.

RE: Chiller Structural Foundation

The mass of the foundation has a response frequency range. If the response frequency of the equipment is dissimilar from the foundation, there will be no vibration.

Mike McCann, PE, SE (WA)


RE: Chiller Structural Foundation

The chiller likely operates at varying speeds, so all the relevant frequencies need to be considered.

RE: Chiller Structural Foundation

(OP)
@EnergyProfessional
Thanks for the input.
I've been having a really difficult time getting information from my local dealers of Arctic, Smartd, and Daikin Chillers. They do not seem to be able to obtain a data sheet with vibration data from their headquarters, and my vibration isolation provider requires that information to propose a solution that leaves residual vibration that the structural engineer can evaluate against the post-tensioned slab roof.
This is becoming a pain in the ass. Had you had to deal with a similar issue?

@msquared48
Thanks. The structural engineer is having a hard time designing over a post-tensioned slab without a vibration check. Hope we get some information soon.

RE: Chiller Structural Foundation

Contact the home office of the chiller manufacturers and tell them that the purchase of the chillers requires vibration data.

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