On entering the menu, use the Touch Ring to scroll to the preferred option (OFF or ON), and confirm
the choice using the OK button. Use the Arrow key to return to the Menu Option display.
SLEEP MENU
The SLEEP mode allows the ST320 to conserve power by turning off the LCD
display. Entering the SLEEP menu allows you to activate this power saving
feature from a 5 second run down timer.
N.B
unit will not control the heating while in sleep mode.
Pressing the OK Key at any time within the 5 seconds will cause the ST320
to immediately go into SLEEP mode, as will allowing the countdown to complete.
Pressing the Arrow key will return the ST320 to the Menu display mode.
Pressing the Touch Ring for 1 second will turn on the LCD backlight, and pressing the Touch Ring
for 3 seconds will wake the ST320 from SLEEP mode and restore the thermostat to NORMAL mode.
CONTROL MENU
By selecting the Control menu, the user can change
the control method used by the thermostat - either
ON/OFF or Pulse Width Modulation(PWM). On
entering the menu, scroll to select the preferred
option (ON/OFF or PWM control), and confirm the
choice using the OK button. Use the Arrow key to
return to the Menu Option display. PWM mode
should only be selected by the Engineer carrying
out the installation, or other qualified person.
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ST320 INSTRUCTION MANUAL
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