Honeywell ST9400A User Manual

11
OPERATING YOUR ST9400A
Overriding the Operation Without Changing the Programmes
In AUTO and ONCE operating modes, the OVERRIDE buttons switch the heating or
hot water ON or OFF without altering the programme.
When the indicator lamp is ON, pressing the OVERRIDE button switches the heating
or hot water OFF until the next programmed ON time.
When the indicator lamp is OFF, pressing the OVERRIDE button switches the
heating or hot water ON until the next programmed OFF time.
The LoT™ Display will provide you with information about the override.
The Extra Hour Function (for Heating and/or Hot Water)
The EXTRA HOUR buttons allow you to switch the heating or hot water ON for up to
3 extra hours without altering the programme. Pressing either button once will give
one extra hour. The LoT™ Display will display the message ‘+ 1 HOUR’, to confirm
the button has been pressed.
When the green INDICATOR LAMP is OFF, pressing an EXTRA HOUR button
switches the heating or hot water ON for just one hour.
When the green INDICATOR LAMP is ON, pressing an EXTRA HOUR button
extends the programmed ON period by one hour.
Further presses of the EXTRA HOUR buttons will increase the extra hour period by
one hour for each button press, up to a maximum of 3 hours. The LoT™ Display will
continue to provide information on the extra hour status.
To cancel the extra hours, just keep pressing the EXTRA HOUR button until the
‘CANCELLED’ message appears on the LoT™ Display.

Honeywell ST9400A Specifications

General

Model	ST9400A
Category	Thermostat
Voltage	230V AC
Switching Current	3A
Mounting	Wall-mounted
Display	LCD
Battery Backup	No
Contact Voltage	230V AC
Frequency	50Hz
Type	Programmer
Switch Rating	3A
Temperature Range	5°C to 30°C
Contact Rating	3A