Please follow Keshav's advice on ESI. For PF, it is not necessary to have multiple accounts, and the central account would suffice.
Benefits of Having a Sub-Account for ESI
Having a sub-account for ESI not only facilitates members in getting cash benefits but also helps in availing their medical benefits. The most important benefit is that it will ensure accident benefits in case an employee is injured or dies in an accident arising during the course of employment. The pension available to the deceased's heirs is fair and useful. Besides, it absolves the employer of the liability under the Employees' Compensation Act (earlier known as Workmen's Compensation Act).
Regards,
Vasudevan