SPECIFICATIONCONTACT RATING 3(1) Amps 230V ACCONTACT TYPE Micro-disconnection Voltage free (S11, S17 only) with optional mains switched supplySUPPLY 230V AC 50Hz onlyPollution Degree 2CLASS A SOFTWAREType 1 ControlOPERATING TEMPERATURE RANGE 0°C to +40°CBATTERY LIFE Minimum 10 months continuous operationCASE MATERIAL Thermoplastic flame retardantDIMENSIONS Width 84mm x Height 150mm x Depth 29mmDISPLAY Back lit liquid crystalCLOCK 12 hour AM/PMAuto BST/GMT changeoverDISPLAYED TIME ADJUSTMENTS 1 minute stepsSWITCHED TIME ADJUSTMENTS 10 minute stepsOPERATING PERIODS PER DAY S11 and S17 - 3 per dayS21 and S27 - 3 per day for CH- 3 per day for HWS17 and S27 - separate programmes possible for each day of the weekOVERRIDE S11 and S17 - 1 hour boost, 1 hour extension to ON period Instant advanceS21 and S27 - 1 hour boost (HW only), 1 hour extension to ON period (HW only), instant advance (CH only)MOUNTING Industry standard 6 terminal plug in wall plateThe ServicePlus range of programmers and timeswitches are designed to carry out a full or partial boiler shutdown once the servicing date has become overdue. The Installer can set the ServicePlus so that either a full shutdown will occur after a 28 day warning period of the boiler service becoming due or a partial shutdown can be selected where a 15 minute period of heating and hot water will occur every hour. These 15 minute periods will occur every hour but never consecutively from one hour to the next. If programmed on installation, the 15 minute 'On' periods will reduce the effectiveness of the heating system so that it becomes uncomfortable for the occupier without it providing no heating at all. This should have the effect of encouraging the householder to call the service engineer to check the system.ServicePlus S27R SERVICE INTERVAL 7 DAY PROGRAMMERThese programmers have industry standard wiring connections, making them ideal replacements for many existing programmers. Featuring up to 3 ON/OFFs a day, hot water boost and central heating advance. Both hot water and central heating outputs are overridden by the internal service schedule. Programme options: ON, OFF, ALL DAY or AUTO. Mains powered with battery back-up.Features a bright back lit display and automatic GMT/BST clock.ServicePlus S21R 24 HOUR VERSION OF S27ServicePlus S17R SERVICE INTERVAL 7 DAY TIMESWITCHThese timeswitches have standard volt free contacts making them ideal for combi boiler installations, whilst also supplying the mains voltage connection, allowing complete control of the boiler. Featuring up to 3 ON/OFFs a day and boost and advance facilities. Both outputs are controlled by the internal service schedule. Programme options: ON, OFF, ALL DAY or AUTO. Mains powered with battery back-up.Features a bright back lit display and automatic GMT/BST clock.ServicePlus S11R 24 HOUR VERSION OF S17S11 and S17 timeswitches include a unique mains switching circuit to disconnect combi boilers.SERVICE INTERVAL PROGRAMMERSServicePlus S27RServicePlus S21RServicePlus S17RServicePlus S11RHorstmann.Together, we're in control.P84357 Issue 1Horstmann Controls Ltd, South Bristol Business Park, Roman Farm Road, Bristol BS4 1UP.Tel: 0117 978 8700 Fax: 0117 978 8701 E-mail: sales@horstmann.co.uk Web: www.horstmann.co.ukA division of Horstmann Group Ltd. Registered office: Secure House, Moorside Road, Winnall Trading Estate, Winchester, Hampshire SO23 7RX. Registered in England No. 457553©September 2011: Horstmann Group Ltd: All rights reserved. The company reserves the right to alter product specifications without notice.

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