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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.

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. 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. Alternatively if you view your parcel once items have been added and enter your postcode you will see what derlivery services are 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. The Honeywell 24-Hour Programmer ST699B1002 White is well suited for fully pumped or gravity hot water systems.

Programming the timing sequence is straightforward, using the top slider switch and [+] and [-] buttons.The ST699 time control programmer can be used as a replacement programmer on gravity primary or fully pumped systems. 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. Honeywell warrants its products to be free from defects due to workmanship or materials, under normal use and service under its warranty periods. The programming sequence for the ST699 is straightforward, using the top slider switch and [+] and ['] buttons. The programmer is suitable for surface or switch box mounting and comes complete with a built-in battery back-up.

You'll find the biggest plumbing brands and latest must-have products including smart home thermostats right here at PlumbingSupermarket. We had the wiring diagrams for both units, and we carefully worked out where the different wires went. We're sorry but this product has now been discontinued by Honeywell Heating Supplies and can no longer be purchased. I like this programmer, it is the second one I have bought over the years and glad that it is still available. Bought this as a replacement for the same unit which had burned out (I suspect following a number of power cuts in the area).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. 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 103 third parties who use cookies on this service do so for their purposes of displaying and measuring personalized ads, generating audience insights, and developing and improving products. The front control unit has spring loaded contacts to the base plate, so you don't even need to do any rewiring.

My system comprises 8 year old Bosch Worcester boiler, Drayton MA1 Mid level valve, new Honeywell DST90E room therm. it fitted the hole perfect, was exactly the right make and fit and works brilliant plus it looked very smart.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. 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)!