7 day, single zone pilot wire programming cassette - plugs directly into heater Master/slave control - master heater fitted with programmer controls up to 10 slave heaters via pilot wire 4 programmable time periods for weekdays and weekends, switching heater between on/off modes Programme advance and manual override features Cassette can be removed from heater for easy programming Back lit LCD with power-save mode Programmes saved in memory for 12 hours in event of power failure Quick start user guides printed on rear of programming cassette Compatible with Monterey, Girona, Saletto and EPX