24 Hour
Mechanical
Time Switch
Model: NTT01
Installation & Operating Instructions
1. General Information
These instructions should be read carefully
and retained for further reference
and maintenance.
2. Safety
• Before installation or maintenance,
ensure the mains supply to the time switch is
switched off and the circuit supply fuses are
removed or the circuit breaker turned off.
• It is recommended that a qualified electrician
is consulted or used for the installation of this
time switch and install in accordance with the
current IEE wiring and Building Regulations.
• Check that the total load on the circuit
including when this time switch is fitted
does not exceed the rating of the circuit cable,
fuse or circuit breaker.
3. Technical Specifications
1
• 230V AC 50 Hz
• Switch Rating: 16A Resistive (3.68kW)
Immersion Heaters
• Switch Type: Micro Switch
• Contact Type: Normally Open
• Minimum Depth
of Wall Box: 32mm
• Manual Override: Permanent ON or OFF
• Power Status
LED Indicator: Red
• Output LED
Indicator: Green
• 24 Hour Time Up to 48 programmes
period: per day
• Operating
Temperature: 0°C to +40°C
• CE Approved
Not suitable for use with
discharge lighting.
The LED switching capabilities of this product
can be increased to 200W by the addition of
the Timeguard ZV900 Automatic switch load
controller – sold separately.
Power LED
Output LED
Programme
ring
Bezel
fixing
screws
ON
segment
Time control segments:
2
1 segment = 15 minutes,
push segment down
for ON, pull up for OFF.
4. Installation
• Ensure the mains supply is switched off
and the circuit supply fuses are removed
or the circuit breaker turned off.
• Remove the two bezel fixing screws,
and remove bezel from timer module
and wall plate.
• Ease the module forward without disconnecting,
so you have access to the wall plate
and loosen the screws on the terminal
block for both supply and load cables.
• Ensuring that the free terminals on the wall
plate are at the top, terminate the 230V
50Hz supply and load cables to the terminal
Bezel
Time
indicator
Control switch:
1 = permanently ON,
Timer symbol =
timed control,
0 = permanently OFF.
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