Advantage WPT Series Central Chillers

No. Like the air-cooled APT-RC line, WPT is refrigeration only, and each module depends on a separate pump tank station for circulation through the process loop. Because WPT modules are built for indoor use, the station can usually sit beside the module, keeping the connecting piping short and rigid. Size that station's flow from the module's rated tons rather than its label: a C-20WPT rated 19 tons, run at a 10°F rise, needs about 46 GPM through its evaporator.

There is no published per-model figure, and we won't invent one. Advantage's own data doesn't state a flow rate or pressure-drop figure for any WPT model, so call or use Request a Quote with your tower or city-water supply details and we'll size the connection against the specific unit's evaporator and compressor duty. The physics shows why the assumed rise matters: the condenser carries the process load plus compressor heat, typically about 25% more, so roughly 285,000 BTU/hr on a 19-ton module. For planning only, at a 10°F condenser rise that is about 57 GPM; at 15°F, about 38 GPM.

Because the number in the model name is a nominal size, not a rating - C-20WPT, for example, is rated 19 tons at standard conditions. Every WPT part-number page leads with the rated capacity, so size and quote against that figure. Even the rated figure is a standard-conditions number. Run the loop cold and it shrinks again: at 25°F leaving fluid, published WPT tonnage is roughly 60% of the 50°F rating. Size off the label and the setpoint together and both errors stack against you.

Whichever matches the utilities already in the building. Air-cooled APT-RC needs no plant water but requires a line-set run out to a condensing section outdoors or on the roof. Water-cooled WPT needs a tower or city-water supply but has a smaller footprint with no remote condenser. The deciding detail is often cost per gallon: tower water already on site is close to free, while metered city water running once through a condenser is paid for every operating hour. See our Air-Cooled vs Water-Cooled guide, or call and we'll help you decide.

Condenser water at 85°F maximum, through a 40 mesh or finer basket strainer. Tower water is the usual source, though city or well water also works, and a water regulating valve on the module varies condenser flow with refrigerant discharge pressure. Basket strainers hold more debris than wye types. The condenser is cleanable and has a single-point water connection with isolation valves. Check the tower before committing: one selected for 85°F water at a 78°F design wet bulb delivers warmer water whenever the wet bulb climbs past that or the tower is loaded beyond its rating. WPT modules are built for indoor use, in a clean, dry, well-ventilated space.

A four-conductor supply from a customer-supplied fused disconnect to the power entry terminal block, with the disconnect and wiring sized to the module's power requirement and local code - treat each module as a seperate load. Advantage leaves no power entry hole in the cabinet, so the electrician cuts one to suit the fittings. Supply voltage must be within 10% of nameplate and within 2% leg to leg. Size the disconnect and wiring on full load amps, not running amps. Components sit in a UL508A panel with branch circuit protection and a standard 5 kA SCCR, so confirm the available fault current at that panel before ordering. A unit-specific wiring drawing ships with the module.

Yes, but not on plain water. The control ships with a 48 to 90°F setpoint range. To go colder, fill the loop with inhibited propylene glycol, never automotive antifreeze, confirm the concentration with a refractometer, then reset the low refrigerant pressure limits and freezestats to match before the control is unlocked for lower setpoints. Too much glycol causes capacity and control problems, so mix to the chart rather than guessing. Expect less capacity when running cold: published tonnage at 25°F leaving fluid is roughly 60% of the 50°F rating, so a 12-ton load at 25°F calls for a module rated about 20 tons at 50°F.