The dual hot/cold faucet has a built-in safety mechanism for the hot water. The hot water lever has a red dot on the top. Push down on the red dot, noting there is a spring mechanism built into the lever assembly.  While the lever with the red dot is depressed, the user can then move the lever downward to release the hot water.
The cold water lever does not have this spring mechanism built into the lever and can simply be moved down for water.