It controls the timing of the hot water and central heating twice a day, but the best bit is that anybody can set the times without having to read any complex instructions! The ST electronic dual zone timer is used to control gravity,primary or fully pumped central heating systems requiring a single 24 hour programme with two ON/OFF periods per day. However, how wrong can you be After just one e-mail to notify mytub of the damage they quickly resolved the issue by delivering a replacement part to me and arranging for the courier to pick up the damaged part, and all this on the day before a bank holiday weekend! If approved and you accept, you'll have a credit limit added to your PayPal account ready to use immediately.

When you claim under warranty you must send your faulty part first and we will check if parts are actually faulty, if so we will replace it under the warranty period.It is not the cheapest one out there but it is fairly simple to install, reliable and easy to understand and use. Honeywell Home ST699 1 Day Classic Programmer is an easy to use replacement programmer on gravity primary or fully pumped systems.

The ST699 is a 24-hour dual zone timer that is designed to replace the programmer on both gravity primary systems and fully pumped systems, with separate heating and hot water temperature controls. The Honeywell 24-Hour Programmer ST699B1002 White is well suited for fully pumped or gravity hot water systems. I like this programmer, it is the second one I have bought over the years and glad that it is still available. I suspect that the Red wire from terminal 8 on ST699 to terminal 4 on ST9400c may be the problem, but not absolutely sure which terminal it should go to on 9400c.

To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. This thread is a few years old just wondering if I can resurrect it to see if there are any more alternatives out there now which are perhaps a better deal. purchased to replace an old unit, looks the same, wires up the same but they have changed the way you set the clock so now you cant set it up to any time you want the heating etc to come on, stupid idea and honeywell were useless with help and advice. This is currently controlling a Honeywell S plan system - CH and DHW (and has done for ages) with absolutely no probs on a Worcester system oil boiler. Yes, there are cheaper, more up to date timer controls available but what you are paying for is ease of replacement.

before it packed in and I didn't think I would find a suitable switch for the wall but this was perfect. If your item is being delivered in the UK or Ireland, it will be delivered by UK Mail/DHL, Hermes or Royal Mail, with the exception of pallet items.

The programmer is suitable for surface or switch box mounting and comes complete with a built-in battery back-up. The front control unit has spring loaded contacts to the base plate, so you don't even need to do any rewiring.

The engineer scheme is here to support you and your clients, simply save yourself time and money on finding parts and gain access to our massive catalog of over 110,000 parts. I tried not connecting (isolating) the wire and not connecting to ST9400c, but then I couldn’t even get Central Heating (and no Hot Water)! We are sorry but the office had been closed over the Christmas period which would reflect why there had been none of our usual communication.

Alternatively if you view your parcel once items have been added and enter your postcode you will see what derlivery services are available.