Chiller Installation and Cooling Tower Rigging for Data Centers

The Nameplate Number Is Not the Weight

In the HVAC world, "tons" measures cooling capacity — not physical weight. A 200-ton chiller for a mid-size data center might weigh anywhere from 20,000 to 50,000 pounds depending on the manufacturer and configuration. Large water-cooled chillers in high-density facilities can push well past 100,000 pounds. The rigging crew works from the equipment submittal sheet or the nameplate shipping weight — never the cooling capacity rating.

Chiller Installation: Placement Scenarios

Most chiller installations on data center projects fall into two primary scenarios. Where the unit lands determines the rigging plan before the first sling is ordered.

Rooftop Placements

Rooftop chiller installations carry structural loading constraints — large chillers impose 100 psf or more on the roof deck. The lift path from grade to final position has to account for building clearances, parapet height, existing equipment, and the crane's operating radius from the street. Seismic bracing, flexible pipe connections, and a clear lift path over the parapet are all part of the pre-lift planning.

Grade-Level Placements

Grade-level installations are more straightforward but still require a solid lift plan, especially in tight mechanical yards where multiple units are being set in sequence. If the chiller needs to travel through a building opening after the initial crane set, the operation expands to include jack-and-slide systems or gantry equipment — a different set of lifting and rigging hardware than the crane lift itself.

Basement and Indoor Installations

Basement chiller installations are the most complex. Ground bearing pressure constraints can limit what rigging equipment can enter the space. Temporary shoring, alignment platforms, and gantry systems replace the crane after the initial drop. These require coordination between the rigging crew and the structural engineer before the lift plan is written.

Cooling Tower Installation: One Extra Variable

Cooling tower installation adds a layer the chiller lift doesn't have: manufacturer-specific rigging requirements. Unlike chillers, which have standard lift lug configurations, cooling towers vary significantly by series — and the rigging procedure is specific to each model.

Smaller towers use four lifting straps positioned 90 degrees apart around the basin. Larger multi-section towers specify lift points at truss pipes or ring positions, and require guide lines attached to the fan motor eye bolt to prevent sway during the lift. The manufacturer's published rigging procedure is not a suggestion. Improvising pick points on a large FRP cooling tower is how casings crack before the unit ever turns on.

Slings for Heavy Mechanical Lifts

For chiller and cooling tower installs, sling selection comes down to load characteristics and surface protection requirements. Both types are stocked in ARG Industrial's rigging and lifting products category.

Wire Rope Slings

Wire rope slings hold up under abrasion, UV exposure, and heat. They're the standard call for heavy industrial lifts where the sling contacts rough or sharp surfaces, or where outdoor storage between lifts is a factor. Wire rope is rated in vertical, choker, and basket configurations — each with different capacity values that must be accounted for in the lift plan.

Synthetic Slings

Synthetic slings — polyester web or round slings — are the preference when the equipment surface needs protection. Chiller housings and cooling tower casings are expensive. A sling that gouges a finish can create a warranty dispute on a unit that hasn't turned on yet. Polyester is generally preferred over nylon for outdoor lifts because it stretches less — around 3 percent at rated capacity versus 6 percent for nylon — giving a more controlled lift.

Sling angle affects capacity significantly. As the angle between the sling leg and vertical increases, load on each leg increases beyond the rated vertical capacity. ASME B30.9 and OSHA 1926.251 both publish capacity tables by sling angle — account for this in the lift plan, not on site.

Shackles and Lifting Hardware

Shackles connect slings to the crane hook, spreader beam, or rigging point. Two body styles do different jobs, and getting it wrong creates a failure point.

Body Styles

Anchor shackles have a wide bow designed for attaching multiple sling legs or handling side-loaded connections. Chain shackles are narrow and D-shaped, built for straight in-line tension from a single leg. Using a chain shackle where the load applies side force is a failure point — the narrow bow doesn't distribute the load the way an anchor bow does.

Closure Types

Screw-pin shackles are standard for temporary rigging: fast to set up and easy to adjust. Bolt-type shackles are used where the pin needs to stay put — semi-permanent rigging or any application where the pin might rotate under load and back out. For chiller installations that involve load rotation or extended dwell time under load, bolt-type is the correct call.

Crosby G-209 screw pin anchor shackles are the industry standard for this work — the working load limit is forged into the body and they're built to ASME B30.26. Shackle WLL must meet or exceed sling WLL. If the marking isn't legible, the shackle stays off the load.

Before the Crane Shows Up

The lift plan is only as good as the gear that arrives with it. Work through these steps before the crane operator is on the clock.

ARG Industrial stocks the full range of slings, shackles, and lifting and rigging hardware for data center mechanical installations. Browse the full ARG Industrial data center supply category for rigging hardware, pipe fittings, and connection hardware across all five phases of the build.

Frequently Asked Questions