Timeguard NTT01 User Manual

24 Hour

Mechanical Time

Switch

Model: NTT01

Immersion Timer

Installation & Operating Instructions

NTT01 – Immersion Timer

Power LED

Bezel
fixing
screws

ON
segment

Time control segments:
1 segment = 15 minutes,
push segment down
for ON, pull up for OFF.

1

Output LED
(NTT01 only)

Control switch:

1 = permanently ON,
Timer symbol = timed
control,
0 = permanently OFF.

1. General:

This time switch is a compact and easy to use
segment timer, which fits on a single gang wall box.
It can control outputs of up to 16A which makes it
suitable for domestic immersion heaters.

2. Features:

Permanent ON/OFF facility. This enables the heater
under control to be turned OFF when alternative
methods of heating are available, or during a
holiday period. It also enables the heater to be
permanently turned ON.

Shortest switching time of 15 minutes increasing
in 15 minute steps.

Up to 48 programmes per day.

Programme
ring

Bezel

Time
indicator

3. Installation:

We recommend that this unit be fitted by a
qualified electrician. Install in accordance
to wiring and current building regulations.
Please read the instructions carefully. If in
any doubt contact the Timeguard Helpline.

Important: Switch off mains electricity
before commencing work.

Remove the two bezel fixing screws, and remove
bezel from timer module and back plate. Separate
the timer module from the back plate, and remove
the wall fixing screws.

Ensuring that the free terminals on the back plate
are at the top, connect the installation wiring to
the terminal block, according to the legend on the
wiring label.

2

The earth wires should be connected to the wall
box earthing terminal, or should be connected
together using a single way connector block if
there is no suitable earth terminal in the back box.

Fit the wall mounting screws through the back
plate into the wall box threaded holes, and tighten
until the back plate is firmly fastened.

Fit the timer module to the back plate, ensuring
the time indicator is on the bottom right hand
side, and the locating holes on the timer are set
correctly on the pegs on the back plate.
Fit the bezel over the timer module, and secure to
the back plate with the two screws provided.

For other wiring, the terminals are marked as follows:

L Live supply.

N Neutral supply.

N OUT Neutral to immersion heater.

SL Live output to immersion heater .

4. Programming the time
switch:

a) Decide what times you would like the time switch

to switch ON and OFF.

b) Push the required segments down for the duration

of an ON period, and pull them up for the duration
of an OFF period. The minimum switching interval
is 15 minutes, and this can be increased in
15 minute steps.

3

c) Set the correct time, by rotating the dial clockwise

until the correct time is indicated by the triangular
pointer. Note that as the dial is rotated there will
be an increased resistance to turning as ON/OFF
periods are passed.

Points to note:

The segment dial can be turned whilst the time
controller is operating.

In case of power failure, re-adjust the time controller
to the correct time of day by turning the dial in a
clockwise direction until the correct time is indicated
by the pointer.

5. Permanent Override:

The main slider on the timer can be set to
permanent ON by sliding it to the left,
aligning the arrow head to the 1 symbol.

In the middle position, with the arrow head pointing
at the timer symbol, the timer is in automatic mode.

If the slider is moved to the right, and the arrow head
points at the 0 symbol, the timer is permanently OFF.

6. Specifications:

Operating temperature: 0°C to 40°C

Operating voltage: 230V 50Hz

Switch rating: 16A resistive,
6A inductive
Minimum depth
of wall box: 32mm

4

Switch type: 22A micro switch

Voltage free contact: No

Contact type: Normally open

Power ON light: Yes

Output Light: Yes

Time period: 24 hours

Note:
Product not suitable for discharge lighting.

3 Year Guarantee

In the unlikely event of this product
becoming faulty due to defective material
or manufacture within 3 years of the date of purchase,
please return it to your supplier in the first year with
proof of purchase and it will be replaced free of
charge. For years 2 and 3 or any difficulty in the first
year telephone the helpline on 020 8450 0515.

Note: a proof of purchase is required in all cases. For all eligible
replacements (where agreed by Timeguard) the customer is responsible
for all shipping/postage charges outside the UK. All shipping costs are
to be paid in advance before a replacement is sent.

For assistance with the product please contact:

HELPLINE

020 8450 0515

or email [e-mail]

For a product brochure please contact:

Timeguard Limited.

Victory Park, 400 Edgware Road,

London NW2 6ND

Sales Offi ce: 020 8452 1112

or email [e-mail]

67.058.475 (issue 3).

Zerofour – April 2013