How to solve suction problem on new central vacuum?

We just installed a new central vacuum with 645W power.
The piping in hour hosue was preinstalled.

We have to inlets, one upstairs and downstairs.
So we installed the vacuum, but when we attach the hose I find it is very low suction.

Is it normal that both inlets are start sucking, when the hose is plugged into one?

What can be the problem?

the whole vac system is sucking check out all of the connection doors to make sure they are closed other then the 1 you are using. check your air fliter in the unit to make sure its clean. also the can it sucks the dirt to make sure the gasket is installed right it maybe damaged

Abortion -This is a Suction Abortion

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