There are three types of lock on the heater and a third party option.

Child Lock - 2-Button press to lock or unlock the keypad

PIN Lock - Setting a 4 digit PIN number to restrict some functions of the heater

School Lock is a feature built into the heater but not advertised and we do not actively support it or encourage its use.

The reason - whilst the diagnostic screens are accessable whilst in child lock, no settings can be changed! Once School Lock is set, no settings can be altered or viewed.

School Lock can only be altered by a qualified person under the permission of the owner of the heater (ie; a school caretaker).

School Lock is ON by placing a jumper over the bottom two pins of the header marked SCHOOL LOCK (or leaving the jumper OFF). 

School Lock is OFF by placing the jumper over the top two pins of the SCHOOL LOCK header (default factory position).

To enable or disable Child Lock, the qualified person has to safely isolate both mains supplies, remove the bottom grill, side panels & outer front panel, then move the jumper. Reassemble heater & power up. If the Jumper is missing it is part number 500000780 or available from RS Components part 674-2400.

Lastly -a wire guard from third party manufacturer Aianos is available that covers the whole heater safely, with an access hatch to get at the controls. This flap could be padlocked shut if needed.