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Single Channel Timeswitch
The Horstmann ServicePlus S17/S17R time switch will allow up to 3 ON/
OFF settings per 24 hours on a weekly schedule 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.
ServicePlus S17 and S17R
User Operating Instructions
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