Honeywell 7 Day 2 Channel Programmer (Wired)

The Honeywell 7 Day Two Channel Programmer ST9400C1000 White is designed for control of both heating and stored hot water in complete systems. The heating and hot water programmes are completely independent, to allow the system to be operated in the most energy-efficient manner possible. ST9400 can also be set as a mini-programmer for older gravity-circulation stored hot water systems, where there is no interlocking control-valve.