Overview EXP-0300

The EXP-0300 Expansion Module is designed to be integrated with the HBX CPU-1000 HVAC Controller, it is not a standalone device. The purpose and function of the EXP-0300 is to provide greater control of pumps in larger mechanical heating systems. Its primary use is to take control of multiple boiler pumps and allow you to take full advantage of the post purge feature of the Control. For example, 1 CPU-1000 + 1 EXP-0100 + 1 EXP-0300 can provide 2, 2 stage boiler controls with 2 boiler pumps, setup using post purge on the boiler pumps.