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Re:Cooling related failure (in Google London DC) by c_o_n_v_e_x on Wednesday July 20, 2022 @04:40AM (#32163026)
Ex HVAC tech here. Also was on a commissioning team for a Google DC in SE Asia.

Heat waves indeed kill equipment. The system is attempting to deal with a higher heat load on the home/conditioned space, while also having to operate with high(er) ambient temperatures.

High ambient temps -> High heat load -> warm(er) return refrigerant temps/high(er) refrigerant pressures -> less cooling for compressor / higher mechanical load on compressor -> Elevated power consumption as compressor is working harder -> higher power/heat levels stress electrical insulation & components.

The system struggles to keep up as the duty cycle is elevated as well. Putting a sprinkler next to the condensor (outside) unit is a hack.

Re:Cooling related failure (in Google London DC) by FartyMcFarter on Wednesday July 20, 2022 @05:18AM (#32163262)
> Putting a sprinkler next to the condensor (outside) unit is a hack.

However, water companies have been telling people to reduce water usage during the heat wave since demand is higher than usual, so this may not be a great idea.