Horstmann ServicePlus S11 User Manual

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The Horstmann ServicePlus S11 /S11R time switch will allow up to
3 ON/OFF settings per 24 hours and has a 1 hour manual boost and
advance button to temporarily override current settings.
There is also a programming switch allowing permanent selection of:
OFF/ON/AUTO/ALL DAY.
Additionally, the ServicePlus time switch gives an advance warning
of the annual boiler safety check due date.
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1

Horstmann ServicePlus S11 Specifications

General

Contact Voltage Rating	230V AC
Contact Current Rating	16A
Voltage	230V AC
Frequency	50Hz
Display	LCD
Battery Backup	Yes
Weight	150g
Operating Mode	24 Hour
Mounting Type	Wall Mounted
Maximum Load	3680W
Temperature Range	0°C to 40°C

Summary

Timeswitch Overview and Controls

Component Identification

Identifies and explains the functions of each button and indicator on the timeswitch.

Digital Display Explained

Details the various symbols and information shown on the digital display.

Manual Operation and Overrides

Boost Function

Temporarily overrides current settings to provide 1 hour of heating.

Advance Function

Moves the timeswitch to the next scheduled ON or OFF operation.

Programme Override Facilities

Override Options

Explains permanent selection of AUTO, ALL DAY, 24HRS, and OFF modes.

Changing Override Settings

Details how to cycle through override modes using the SELECT button.

Programming Schedules

Setting the Time of Day

Step-by-step guide to accurately set the current time on the timeswitch.

Setting On and Off Times

Instructions for programming the desired heating ON and OFF periods.

Maintenance and Resetting

Resetting the Programmer

Procedure to restore factory default settings to resolve issues.

Battery and Service Information

Details battery life, power interruption effects, and service recommendations.

Understanding Programmer Functionality

How Timeswitches Work

Explains the general concept and operation of timeswitches for householders.