User Manual | MTI 424, 423, & 421 9
OPERATION
Operating Conditions
Ambient Temperature +10°C to +40°C
(+50°F to +104°F)
Relative Humidity 30% to 75%
(non-condensing)
Atmospheric Pressure 700hPa to 1060hPa
(0.69atm to 1.05atm)
Controls
Hand Switches/Foot Controls
ITEM DESCRIPTION FUNCTION
1 Swivel Button Press and release swivel button within two seconds will allow chair to swivel for six
seconds or until the swivel or any other button is pressed. Press and hold the swivel
button for longer than two seconds will allow the chair to swivel until the button is
released. See “Swivel Operation” on page 11 for more details.
2 Back Buttons/Pedal Raises or lowers the backrest by pressing the desired direction. Button is non-
functional on the 421 Chair.
3 Tilt Buttons/Pedal 424 Only: Decreases or increases the angle of the seat by pressing the desired
direction
4 Lift Buttons/Pedal Raises or lowers the chair top by pressing the desired direction
5 Program Buttons Moves the chair to a user programmed position
6 Enter Button Press this button followed by a program button to save the current position of the
chair as a programmed position.
7 Return Button Returns the chair to the home position (Lift Down, Tilt Down, Back Up, and Foot
Down)
8 Stop Button Stops all movement of chair
NOTICE/AVIS
For additional safety, any button will stop all motions except for the same button that was pressed to initiate movement.
Pour plus de sécurité, n’importe quel bouton peut arrêter tous les mouvements à l’exception du bouton même qui a été
pressé de commencer le mouvement.
424 423
421