Follow the instructions bellow to merge your places page with a normal google plus page.
Situation in brief: I created a very new places page for my company in google plus and our company already having a google plus page.
In your Company / Places Page Account:
- Go to Dashboard
- Right Top side, there is a Gear Icon click on there and go to settings.
- Under the Profile section find "Connect Different Page" button.
Add next and finish your final steps.