Honeywell 9400c Wiring Diagram

Suitable soldering iron for circuit board work and some solder wire. St9400c temperature controller pdf manual download.

Replace Honeywell St9400c With Nest Thermostate E Avforums

I have a ST9400C which worked OK but every few days the heating switches from Auto to off - usually in the night so no heat in the morning.

Honeywell 9400c wiring diagram. STEPS a Switch off power to unit at mains. Honeywell st9400c programmer wiring diagram. Two flat bladed screwdrivers and a pozi-drive.

Live live neutral neutral 3 4 4 na 5 na 6 3 7 1 8 na. I cant even find a mention of it on any Honeywell website - UK USA or Europe. Speci cation ST9400 is an Electronic Programmer which provides accurate time Power Supply.

System is pumped CH with gravity HW no cylinder stat or motorised valve but there is a room stat. ST9500C is a 2 channel 7 day full programmer designed to control 2 heating zones. Doesnt help I cant find a wiring diagram for the ST1250 anywhere on the web.

This programmer gives great flexibility offering up to three onoff switchings per day additionally. Our product range is designed to provide the homeowner with the best in comfort energy and health solutions. A static protection wrist strap and connection to ground is a good idea.

Honeywell St9400c Wiring Diagram ST can also be set as a Mini- Honeywell ST can be used as an aid to compliance. ST9400C is a 2 channel programmer designed for control of both heating and stored hot water in complete systems. ST9400A is a 1-day version and ST9400C is a ST9400 not.

The ST6400C and the ST6450 programmers can be replaced with the ST9400C Programmer without the need to replace the backplate or wiring however we always recommend installing a new backplate when installing a new programmer. ST9400A ST9400C Programmer. Current ST699 is faulty would like to replace with 9400C but cannot see that it would work although Honeywell say it will.

This unit is a 7 day full programmer that gives great. Dec 19 2016. Honeywell diagrams give the details for wiring but with no terminal 8 as on the ST699 I can not see a way of wiring it.

Describes the answer or the required steps that resolve the issue. Electrical wiring for central heating systems. Though it might be easier to swap WCT5 and WCT8.

Page 3 of the pdf wiring diagram upload attached shows the basic system 2 with room thermostat wiring layout I currently have exactly. Basically Power is being supplied via a Plug-in cable to the Honeywell ST 9400C Programmer Backplate - From there a cable supplys the Timed Feed to the Potterton Netaheat 10 16 Electronic Boiler and the Pump is wired to the same terminals within the Boiler Terminal Block as the Timed Feed - So the Programmer turns on both the Boiler and Pump. ST9400 see notes 1 2 Introduction.

See Wiring Guide document EN3H2393 Issue 12 Completion Checklist for Installation 1. However they are also supplied complete with a wiring back-plate should this not be the case. Click the icon or the document title to download the pdf.

So the wire to terminal 8 from the boiler is throwing me as all the conversion examples from the norm basic set up on the st699 to the st9400c do not mention this direct connection from the boiler only a loop from 8 to 5 pins that can be removed. ST9400 Programmers will mount directly onto many existing manufacturers back-plates without the need for re-wiring. The heating and hot water programmes are completely independent to allow the system to be operated in the most energy efficient manner possible.

Attached is the Installer Guide for the ST9400C Programmer. The hot water works OK even when this happens. In the Sundial S Plan W Plan and Y Plan wiring diagrams.

Contains all the essential Wiring Diagrams across our range of heating controls. I have a 10 way wiring box to which the system boiler cylinder stat and room stat and 2x two port valves will eventually be connected when I get round to it. ST9400C installer guide wiring diagram.

230V 5060Hz 10W ST7100 control for central heating systems with separate programmes for Switch Action. If using the ST9400 to replace other Honeywell Programmers the equivalent wiring terminations are shown in the tables below. The implication is that the wires I have at 9400cT3 and 9400cT4 need to be swapped over.

Otherwise be careful what you touch on the circuit board. Central Heating Wiring Diagrams Honeywell Central Heating Wiring Diagrams Sundial Y Plan PLEASE NOTE WE DO NOT ACCEPT ANY RESPONSIBILITY FOR THE ACCURACY OF ANY OF THE DIAGRAMS LITERATURE OR MANUALS AND INFORMATION MAY HAVE BEEN SUPERCEDEDAMENDEDWORK MUST BE COMPLETED BY QUALIFIED ELECTRICIANS OR. Refer to Honeywell for wiring conversion diagrams.

Replaced the programmer and same fault is happening again even though I left it on the factory default program. Just for your info there was a recall on these programmers due to this sort of fault I had it with mine at home if I set the hot water to come on 10mins before heating all was fine but didnt work if both set to same time there is a way to find the date code with certain presses or a sticker on the back then ring Honeywell ive had 4 different callout to the same problem in recent years. We are the leading suppliers of domestic heating and combustion controls in the UK with products that include time temperature gas and water controls.

Honeywell st9400c 7 day programmer is a 2 channel programmer designed for control of both heating and stored hot water in complete systems. 2 x SPDT heating and hot water. ST9400C 7 Day 2 Channel Programmer.

My only real concern is that I have a Honeywell ST9400c programmer that has 6 terminals - Live Neutral CH on. Zoning a house not only helps make the heating system more energy efficient but can also improve comfort conditions as each zone will only be heated when required.

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