Timeguard NTT08 - Manual (Page 4)

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4. Battery:
The time switch has a factory fitted rechargeable
battery to give clock operation and programme
memory back up during loss of mains supply.
Before programming for the first time, connect the
unit to the mains for at least 15 minutes prior to
pressing the Rst button and programming the unit.
If the display is not visible or very faint, charge for
4 hours prior to pressing Rst and programming.
or the cable entry ports provided. If the wiring is
not through the knock outs, use the cable clamps
provided to secure the cables.
Connect the installation wiring to the terminals
provided, according to the legend on the terminal.
The terminals are marked as follows:
L
Live supply.
N neutral supply.
N neutral supply to immersion heater.
L1 Switched Live to immersion heater.
E
Earth continuity.
note: this device needs to be left to charge for
a minimum of 15 minutes once powered up,
before it will operate.