Honeywell ST9400C is a 2 channel programmer, designed for control of both heating and stored hot water in complete systems. The Honeywell ST9400C heating and hot water programmes are completely independent, to allow the system to be operated in the most energy efficient manner possible. The Honeywell ST9400C unit is a 7 day full programmer that gives great flexibility offering up to three on/off switchings per day, additionally each day can be programmed differently. Ideal for when the user has different heating needs from day to day. Honeywell ST9400C can be set to 5/2 day or 1 day programme during installation. Honeywell ST9400C can also be set as a mini programmer for older gravity circulation stored hot water systems, where there is no .
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