Just to make sure, you can identify various brands/make/models of CPAP machines here:
http://www.apneaboard.com/cpap-machine-p...ur-machine
Once you know what brand & specific model you have, go to this page for directions on how to get into the Clinician Setup Menu in order to change pressures and other settings:
http://www.apneaboard.com/adjust-cpap-pr...tup-manual
In Section Three of the above page, you can request the Clinician Setup Manuals for most CPAP machines via email.
In your manual request email, it's best to copy and paste the exact make & model from Section Three and make sure you list which REMstar series it is:
aselvan - If your machine is the pre-2007 REMstar Plus with C-flex (looks like the machine on the left in the above picture), in order to enter the setup menu to change pressures, simply hold down the two top "user buttons" (sort of look like left/right arrows) while plugging in the power cord. Continue holding down the user buttons until you hear a beep - and then you'll be in the Clinician (Therapy) Setup Mode.
From that point, you can now select the various menu options, including compliance hours, elevation, CPAP/CFlex mode, pressure, fine adjustment, and other stuff. Select the right/left user buttons to scroll through the various setting options. Use the left-hand side RAMP & Humidifier buttons to select the individual level or setting you desire. When all settings are the way you want them, push the power on/off button to exit the Clinician (Therapy) setup mode.