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. Warranty: Most parts come with a 1 year warranty, With parts where warranty is applicable, we do not extend warranty after the 1 year period. Programming the timing sequence is straightforward, using the top slider switch and [+] and [-] buttons. So, for example, if you set your heating to come on at 5pm and go off at 10pm, but only want hot water on from 6pm to 7pm.

We find the physical slider switches so much easier to use than having to press a couple of buttons repeatedly for the various functions. Just looking for something as low cost as possible that I can control via the internet connection if I'm away from the home. Once that was out of the way, the rest went smoothly, and the unit has been working well since then, which is a month now.HONEYWELL ST699 B1002 ELEC 24 HOUR PROG The ST699 time control programmer can be used as a replacement programmer on gravity primary or fully pumped systems. 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)! 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. It is not the cheapest one out there but it is fairly simple to install, reliable and easy to understand and use. Bought this as a replacement for the same unit which had burned out (I suspect following a number of power cuts in the area).

We're sorry but this product has now been discontinued by Honeywell Heating Supplies and can no longer be purchased. The HONEYWELL ST699B1002 ELECTRONIC PROGRAMMER 230V - Now Use 4201085 is a genuine, brand new Honeywell Heating Supplies product, covered by a Honeywell Heating Supplies manufacturer's guarantee. You can change your choices at any time by visiting Cookie preferences, as described in the Cookie notice. Had a look at my wiring centre and the wiring for the two port ch valve doesn't appear to have a brown wire - it looks black! 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.To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. 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. 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. The ST699 is an electronic central heating time control programmer that can be used on gravity primary, or fully pumped systems having separate heating and hot water temperature control. The ST699 time control programmer can be used as a replacement programmer on gravity primary or fully pumped systems.