Daikin Says First U.S. CO2 ZEAS Condensing Units Go In at Lynn Supermarket
Daikin's catalogue rates the CO2 ZEAS line at 8 to 15 horsepower, with 19.8 to 31.7 kW of medium-temperature capacity and 11.2 to 17.3 kW at low temperature, on a high-pressure side designed for 120 bar, about 1,740 psi, at Bazaar's fifth Massachusetts store.
Daikin Europe said the first Daikin CO2 ZEAS condensing units sold into the U.S. market are being set in place at a new Bazaar Supermarkets store in Lynn, Massachusetts. "The first Daikin ZEAS CO2 units for the U.S. market are being lifted into position at the new Bazaar Supermarkets store," the company said in a LinkedIn post last week. It did not give a unit count.
AHT Cooling Systems USA is supplying the store's refrigeration package. AHT said it is providing a full Vento SPI R290 water-cooled system, CO2 cold rooms "powered by Daikin ZEAS with Luve evaporators and Carel EEV's," and Sydney multi-temperature jumbo bunkers. Lynn is Bazaar's fifth Massachusetts store, after Allston, Newton, Brookline and Framingham, so the CO2 units are going into a new building rather than replacing an existing rack.
Eight to 15 Horsepower, Both Temperature Bands
Daikin's catalogue for the line, publication ECPEN23-892, lists the LREN8A7Y1B, LREN10A7Y1B and LREN12A7Y1B at 8, 10 and 12 horsepower, plus a 15 horsepower arrangement that pairs the 12 horsepower unit with an LRNUN5A7Y1 capacity-up module. Medium-temperature capacity runs 19.8 to 31.7 kW, roughly 67,600 to 108,200 Btu per hour, and low-temperature capacity 11.2 to 17.3 kW, or 38,200 to 59,000 Btu per hour, both rated at 32 C ambient. Evaporating temperature covers minus 40 to 5 C, with a low-temperature band reaching minus 40 and a medium band from minus 20 to 5, and the ambient limits are minus 20 to 43 C, or minus 4 to 109 F.
Three hermetically sealed inverter-driven swing compressors do the work, each rated at 4,600 watts. Daikin's installation and operation manual, 4PEN704141-1F, identifies the main electronic expansion valve as transcritical and lists a gas cooler outlet thermistor, and it rates the high-pressure side at 120 bar gauge, about 1,740 psi, with safety valves set at 90 bar on the high side and 60 bar at the suction connection. No factory charge is listed beyond residual CO2, which puts the entire inventory on the field crew. A vacuumed system sits below the triple point, so the manual says to begin charging R744 as vapor and switch to liquid at 4.2 bar gauge, keeping solid CO2 out of the line.
Why This Matters to Contractors
The LREN-A manual calls for 5/8-inch liquid and 7/8-inch gas copper in R300 temper at 1.05 and 1.50 millimeter wall thickness, rated to the same 120 bar as the unit, and it names one recommended liquid-line drier for transcritical CO2 service, GMC Refrigerazione type CSR485CO2. It also sets a ventilation wait: about 15 pounds of CO2 released inside the casing takes roughly five minutes to clear before a technician closes the cabinet. The compliance paperwork Daikin publishes with the line is European, including a declaration of conformity to the EU Pressure Equipment Directive 2014/68/EU.
Sources
- Daikin Europe, LinkedIn post on the Lynn, Massachusetts installation, reshared by Jon Nixon, accessed Nov. 9, 2026. linkedin.com
- AHT Cooling Systems USA, LinkedIn post on the Bazaar Supermarkets Lynn project, accessed Nov. 9, 2026. linkedin.com
- Daikin Europe, "LREN-A, LRNUN-AY1 Installation and operation manual," 4P704141-1F, December 2024. daikin.eu
- Daikin, "CO2 ZEAS Refrigeration condensing units," ECPEN23-892. daikinmea.com
- Michael Hines, "Bazaar Supermarkets Installs First Daikin ZEAS CO2 Condensing Units in the U.S.," NaturalRefrigerants.com, Nov. 9, 2026. naturalrefrigerants.com