Venstar ACC0620 User manual

ACC0620

KEYPAD LOCK

To prevent use of the thermostat buttons after the locking cover has been installed:          

          Press and hold the MODE button          

          While holding the MODE button down, press the UP and DOWN arrow buttons

               simultaneously.          

          The LOCKED icon will appear on the display.          

          The thermostat is unlocked by performing the same procedure as outlined above.

1

SECURITY LEVELS 

On commercial thermostats security levels are a great feature which the locking  cover 

enhances.  The security levels allow limited button function, which is determined by which 

security level is set.

          Security “Level 0” is no security, however as in Step 1, the buttons can still be 

               locked with a keypad lockout.

          Security “Level 1” allows set point limiting (maximum heating and minimum cooling

               temperature setpoints).

          Security “Level 2” allows set point limiting (maximum heating and minimum cooling 

               temperature set points) and locks the thermostat into Program mode.  This is 

               normally used to keep the program running at all times.

          Security “Level 3” locks out all the buttons except for the OVERRIDE button.  

              Security level  3 is normally used so that no changes can be made to the set 

              points and the program is running at all times.   During programmed, 

              unoccupied periods a press of the Override button will force the thermostat into 

              Occupied 1 comfort settings, temporarily.  With each successive push of the 

              Override button, the override timer will add 30 minutes, until the maximum of 4 

              hours is reached. Then the next press will zero out the override timer, returning 

              to unoccupied if there are no further button presses.

Security levels are set in 

Advanced Setup.  

To enter 

Advanced Setup,

 push the MODE 

and PROGRAM buttons simultaneously.  If there is no PROGRAM button press the 

MODE and BACKLIGHT buttons.  Now press the MODE button repeatedly until “SEC” 

appears in the left upper corner, then set the security level using the UP or DOWN arrow

keys.  Once the security level is 1, 2, or 3, press the MODE button to advance to the next 

step.  Use the UP or DOWN arrow key to set the Maximum Heating temperature set

point allowed.  Press the MODE button to advance to the next step.  Use the UP or 

DOWN arrow key to set the Minimum Cooling temperature setpoint allowed.  Finally, to

exit 

Advanced Setup

 press the PROGRAM or BACKLIGHT buttons once.  

2

INSTALLATION

Mount thermostat on wall and set desired security levels and/or lock the buttons BEFORE 

attaching locking cover.  

To attach cover, hook the left edge of the cover under the thermostat, then close the cover 

and turn the key lock 90 degrees.  The locking cover locks the thermostat door closed and 

also locks the thermostat to the wall.                  

3

1

attach

unlocked

locked

2

88-621

Rev. 1

LOCKING COVER

FOR COMMERCIAL THERMOSTATS