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Honeywell ST9400A1002 1 Day, 2-Channel, 10 W, 24 V

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Afghanistan, Algeria, American Samoa, Angola, Anguilla, Antigua and Barbuda, Argentina, Armenia, Aruba, Azerbaijan Republic, Bahamas, Bahrain, Bangladesh, Barbados, Belize, Benin, Bermuda, Bhutan, Bolivia, Botswana, Brazil, British Virgin Islands, Brunei Darussalam, Burkina Faso, Burundi, Cambodia, Cameroon, Cape Verde Islands, Cayman Islands, Central African Republic, Chad, Chile, China, Colombia, Comoros, Cook Islands, Costa Rica, Côte d'Ivoire (Ivory Coast), Democratic Republic of the Congo, Djibouti, Dominica, Dominican Republic, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Ethiopia, Falkland Islands (Islas Malvinas), Fiji, France, French Guiana, French Polynesia, Gabon Republic, Gambia, Georgia, Germany, Ghana, Greenland, Grenada, Guadeloupe, Guam, Guatemala, Guinea, Guinea-Bissau, Guyana, Haiti, Honduras, Hong Kong, India, Indonesia, Iraq, Israel, Jamaica, Japan, Jordan, Kazakhstan, Kenya, Kiribati, Kuwait, Kyrgyzstan, Laos, Lebanon, Lesotho, Liberia, Libya, Macau, Madagascar, Malawi, Malaysia, Maldives, Mali, Marshall Islands, Martinique, Mauritania, Mauritius, Mayotte, Mexico, Micronesia, Mongolia, Montserrat, Morocco, Mozambique, Namibia, Nauru, Nepal, Netherlands Antilles, New Caledonia, New Zealand, Nicaragua, Niger, Nigeria, Niue, Oman, Pakistan, Palau, Panama, Papua New Guinea, Paraguay, Peru, Philippines, Puerto Rico, Qatar, Republic of the Congo, Reunion, Russian Federation, Rwanda, Saint Helena, Saint Kitts-Nevis, Saint Lucia, Saint Pierre and Miquelon, Saint Vincent and the Grenadines, Saudi Arabia, Senegal, Seychelles, Sierra Leone, Singapore, Solomon Islands, Somalia, South Africa, South Korea, Sri Lanka, Suriname, Swaziland, Taiwan, Tajikistan, Tanzania, Thailand, Togo, Tonga, Trinidad and Tobago, Tunisia, Turkey, Turkmenistan, Turks and Caicos Islands, Tuvalu, Uganda, United Arab Emirates, Uruguay, Uzbekistan, Vanuatu, Venezuela, Vietnam, Virgin Islands (U. The Honeywell ST9400A is a temperature controller designed for the efficient and convenient regulation of heating and hot water systems. They mention that it is easy to program and operate, changing the settings was delightfully easy, and that the controls are easy to read and set. Getting the programmer onto the backplate was very fiddly and it took several attempts to get it on. Tightening the 2 x screws underneath was very awkward too, although that was also true of the old unit.

ST9400A is a two channel 1 day programmer with independent timing for control of heating and hot water zones. Honeywell are the leading supplier of domestic heating and combustion controls in the UK, and are a Fortune 100 company employing over 127,000 people worldwide. T echnologies Sarl, Ecublens, Route du Bois 37, Switzerland by its Authorised Representative Honeywell Inc.It is simple to use but still allows heating and hot water to be set at different times from each other. I have seen on some reviews that people complained that the clock as comes was 5 minutes slow, and they could not reset it. This programmer did not need any rewiring as a replacement for my old Danfoss FP 715 programmer as it uses the same wiring base. The Honeywell ST9400A offers a user-friendly interface, allowing homeowners to easily program and adjust the temperature settings according to their preferences. If you are concerned about possible frost damage to any exposed pipe work, it is advisable to fi t a frost protection system – your installer can advise you about this.

This feature enables homeowners to effectively manage their energy consumption, reducing wastage and optimizing efficiency. Equipped with advanced technology, the Honeywell ST9400A utilizes a two-channel control system, facilitating independent control of heating and hot water. So when it started to play up (The pump would come on but the boiler wouldn't trigger) I decided the controller had gone wrong (despite a plumber telling me it was just air in the heating system). Features Easy to use slider and buttons combined with ‘LoT’™ Technology and an ‘OK’ button , allows you to confi rm changes and stay in control.All ST9400 models incorporate the Line of Text (LoT) display that gives clear plain English instructions whenever any button or slider is used. The ST9400A has a large backlit LoT display which provides text feedback with help and programming hints as well as automatic summer/winter 1 hour change and a choice of 3 different built in programmes. Most purchases from business sellers are protected by the Consumer Contract Regulations 2013 which give you the right to cancel the purchase within 14 days after the day you receive the item. I would have fitted the new one anyway, but I know some people are nervous about wires and electricity.

Heating and hot water systems based on boilers account for of this fi gure, so it is important to understand how your controls can help to maximize energy effi ciency while maintaining your comfort.Just one niggle, when the display is lit by a clear blue sky during the day the display shows dark patches.

The ST9400A does not directly control the temperature but works together with other temperature controls, such as room thermostats and cylinder thermostats, to control your heating and hot water system in your home. The unit has independent controls to Override the time switch setting (turn On when Off or Off when On) and also Boost to just give 1 - 3 hours extra On time. LoT™ Technology provides you with informative ‘on-screen’ feedback and operational assistance as and when required.Today a leading supplier to aerospace, automation, control and transportation industries throughout the world, Honeywell’s origins were in the area of heating controls, a market which they still dominate today. Is the Installer set-up programme for the ST9400A programmer always available to change parameters, even after set-up was completed a couple of years back, or is it a one time setting following a new installation ?

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