The present invention relates to a ground source heat pump integrated controller and the method of achieving the same. The ground source heat pump integrated controller of the present invention comprises a main module that has pre-integrated multiple main machines, pumps and valves according to the rated load of the main module and a number of extended modules that have pre-integrated multiple main machines, pumps and valves according to the rated load of the extended modules, said main module and extended modules both being provided with a plurality of analog contacts and digital contacts, and said extended modules being connected, via the analog and digital contacts, to the main module according to the load of the ground source heat pump system. The advantage of the present invention lies in that after system load is calculated according to floor area, multiple extended modules are connected to one main module, which increases the capacity of the main module and thus meets the requirement of system load. The ground source heat pump integrated controller directly connects the pre-integrated main module to the pre-integrated extended modules, which does not require additional programming and thus achieves better scalability and flexibility.
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