intermatic 24 hour mechanical timer intermatic 2t2503a intermatic 208/277v timer clock motor wg1573 water pool heater time intermatic 20-amp 24-hour spst 1-circuit digital time switch dt101 intermatic 240 volt timer intermatic 208 277 timer switch intermatic 2t2503a plastic weatherproof cover intermatic 24 hour timer intermatic 240 volt pool timer intermatic 240v pool timer t-104