Carrier 30XA, 30RB and AquaEdge chillers built before 2020 rely on 650 kg copper-aluminum blocks holding 180 kg of R-32. Kaltra now ships replacement coils that swap into the same rails at only 470 kg and 110 kg charge, releasing 180 kg of roof capacity and 1 600 € of annual carbon-tax on a 700 kW unit.
Flat aluminium multi-port tubes are vacuum-brazed at 600 °C under nitrogen, creating a monolithic core rated 30 bar / 200 °C and 650 h salt-spray. The epoxy-free surface meets 20-year coastal duty without field coatings. Headers are drilled to original Carrier drawing numbers—nozzle position, bolt pattern and split-ring groove—so the coil installs in one shift using existing gaskets and hardware. Order at Kaltra on https://www.kaltra.com/microchannel-replacement-coils/carrier-coils
An integral sub-cooling row recovers 7 K liquid temperature, raising chiller COP 3 % and cutting compressor lift during peak summer. Fin density 18–22 FPI is selectable on-line, letting engineers balance capacity and noise for night-time low-speed operation.
AI sizing portal returns validated duty, pressure drop and price in sixty seconds; STEP and ERP files export automatically. Coils ship from Graz in ten days, pressure-tested 52 bar, dried −40 °C dew point and plugged with UV caps. Upgrade today and extend chiller life two decades without structural mods.
