Please note Vcenter heart beats is end of life
vCenter Server Heartbeat - End of Availability
VMware is announcing the End of Availability (EoA) of all VMware vCenter Server Heartbeat versions effective June 2, 2014. As a result, all versions of vCenter Server Heartbeat will be removed from the VMware price list on June 2, 2014. After this date, you will no longer be able to purchase these products.
You can install the vcenter inventory service and vcenter server on same VM or separate depend upon your environment load