General Information; Technical Specifications - Timeguard NTTHDA Installation And Operating Instructions Manual

1. General Information

These instructions should be read carefully and retained for further
reference and maintenance.
Note:
time. Up to date instructions will always be available for download at
www.timeguard.com
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.
1
• 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.
• To clean use a clean dry cloth only. Do not use liquid cleaners.

3. Technical Specifications

• Mains Supply:
• The NTTHDS is of class I construction and must be earthed.
The NTTHDA and NTTHDM are of class II construction.
• Switch Type:
• Voltage free contacts
• Contact Type:
• Led Status Indicators:
• Operating Temperature:
Timeguard reserve the right to alter these instructions at any
230V AC 50Hz
20A Relay
Normally Open NTTHDA
Changeover NTTHDM, NTTHDS
Red (Power), Green (Output)
0°C to +40ºC