Honeywell TrueSTEAM HM506 Installation Manual page 28

STEP TWO: Remove the Water Tank
Make sure the tank is empty. The Empty light turns on
when it is.
Turn the manual shutoff valve to the "Unlock" position.
Grip the white water valve arm and slide it back to
disengage from the tank's black spool.
Grip the tank bottom firmly. Push down the safety
release button and pull the latch forward to
release the tank.
Note: The latch remains attached to TrueSTEAM and is not removed
with the tank.
26 TrueSTEAM Humidification System 69-2285EF--01