ABAC COOL 275 Refrigerated Air Dryer - 275 SCFM, 188 PSI Max, R-404A, 230V Single-Phase

The ABAC COOL 275 is the largest dryer in the COOL range. It strips moisture out of compressed air before it reaches your tools, drops and finishing work, and at 275 SCFM it is sized for the biggest air system the range covers, which ABAC rates at up to 60 HP. It runs on 230V 60 Hz single phase power, so a shop can put a dryer this size behind a large rotary screw or a duplex piston system without pulling a new three phase feed.

Key specifications

• Model: COOL 275, ABAC type C10 (part number 4102006323)
• Type: refrigerated compressed air dryer, hot gas bypass design, vertical cabinet
• Rated flow: 275 SCFM
• Compressor sizing: rated to 60 HP
• Maximum working pressure: 188 PSI
• Power supply: 230V, 60 Hz, single phase
• Refrigerant: R-404A
• Weight: 176 lbs
• Dimensions: 13 x 28 x 39 in
• Condensate removal: automatic timer drain
• Brand: ABAC, part of the Atlas Copco group

Figures above are from the COOL 15-275 range flyer. Ratings are quoted at 100 PSI working pressure, 95 F inlet air, 77 F room temperature and a 45 F pressure dew point.

Typical applications

Paint and body shops, cabinet and woodworking shops, production cells, laser and plasma tables, packaging lines, injection molding, pneumatic control systems and tire inflation benches. Anywhere water in the air line is blowing out finishes, rusting tools and fittings, or freezing an outdoor drop in winter. A refrigerated dryer chills the compressed air so the water condenses, drains it away, and sends dry air down the line. It is the most straightforward way to stop moisture damage downstream of a compressor.

How the COOL range works

ABAC builds the COOL range around a combined air to air and air to refrigerant heat exchanger with an integrated water separator, a hot gas bypass valve that holds refrigeration capacity steady across load conditions and keeps the evaporator from freezing, a capillary tube and refrigerant filter on the cooling circuit, a refrigerant compressor protected against thermal overload, an air cooled condenser, a timer drain that clears condensate on its own, and a front panel dew point indicator with a green target zone so you can read air quality at a glance. ABAC rates the COOL range for a 45 F pressure dew point, which it notes covers more than 95 percent of industrial compressed air applications. The vertical cabinet keeps the footprint small and leaves the serviceable parts reachable from the front.

Service and running cost

The COOL 275 carries a sealed R-404A circuit. There is no desiccant to replace and no purge air lost to regeneration, which is the running cost that separates a refrigerated dryer from a desiccant one, so a dryer this size stays cheap to leave running alongside the compressor. Routine upkeep is keeping the air cooled condenser clear of dust so it can reject heat, checking that the timer drain is actually discharging, and leaving clearance around the cabinet for airflow. The hot gas bypass valve is factory set and is not a field adjustment, so a dew point reading outside the green zone usually points to a dirty condenser, a hot room, or incoming air above the limit rather than to the valve.

Sizing and installation

Size the dryer to the compressor it follows, not to the pipe it bolts into. The COOL 275 sits at the very top of the COOL line, so step up to it when a COOL 250 is running at its limit or when the system is built around a compressor up to 60 HP.

Real conditions move the published number. Capacity drops as the room gets hotter and drops harder as incoming air gets hotter, so a dryer sitting in a hot room or close to a compressor discharge will not hold its rating. Higher line pressure works the other way and recovers a little capacity. If the dryer has to live near the compressor, fit an aftercooler ahead of it and give the condenser clear airflow, out of the heat the compressor throws off.

How it compares and what to pair it with

Pressure rating is the first thing to check against your system. The COOL 125 is rated to 232 PSI, while the COOL 150, the COOL 200, the COOL 250 and this COOL 275 are rated to 188 PSI. If your system regularly sits above 188 PSI, size around that ceiling rather than around flow alone. The 275 shares the same cabinet and the same 230V single phase supply as the 250, so moving up to it is a capacity step rather than an installation change.

Pair it with a coalescing filter upstream for oil carryover and a particulate filter downstream when the work calls for cleaner air, and give the condensate somewhere to go. See the rest of the refrigerated air dryer range and our full air dryers lineup, or the rotary screw air compressors and piston air compressors this size of dryer is most often paired with. Call us for the COOL 275 connection sizes and installation clearances before you pipe it in.