The CD with the software for the Diagnostics for the Vaillant boiler Vrdialog 8102 is very out of date. If you are replacing look at the possibility of installing momo actuators, no springs involved and no highly stressed mechanical components, designed to jam or break.

Please note that if the item requires testing your refund will take approximately 14 days from receipt at Adlink UK Limited.We currently have a Drayton ZA5/679-3 and there is no longer correct switching between the 2 exit valves (boiler water + heating water). The Drayton 22mm 3 port valve features "snap-on" actuators and has simple industry-standard wiring and dimensions. Used primarily in larger properties for zoning, Drayton's 2 port, diverter and mid-position valves are available in 22mm and 28mm. We also supply replacements for obsolete Switchmaster SM and Drayton Tempus time controls, and other Drayton heating control products.

My question is can the actuator be replaced with a different more reliable model without changing the valve itself? Invensys were formed in 1998, following the merger of Siebe and BTR, resulting in a group with more than 150 subsidiaries throughout the world, and including well-known brand names such as Robertshaw, Eberle, Ranco, Eliwell, Satchwell Control Systems and of course, ACL-Drayton. If you can remove the actuator and control the flow by manually rotating the shaft, then it will be the actuator only. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.PO Box, Afghanistan, Algeria, Angola, Anguilla, Argentina, Benin, Botswana, British Virgin Islands, Burkina Faso, Burundi, Cameroon, Cape Verde Islands, Central African Republic, Chad, Comoros, Côte d'Ivoire (Ivory Coast), Democratic Republic of the Congo, Djibouti, Equatorial Guinea, Eritrea, Ethiopia, Falkland Islands (Islas Malvinas), Gabon Republic, Gambia, Ghana, Guinea, Guinea-Bissau, Guyana, Haiti, Iraq, Kenya, Laos, Lebanon, Lesotho, Liberia, Libya, Madagascar, Malawi, Mali, Mauritania, Mauritius, Mayotte, Morocco, Mozambique, Namibia, Nauru, Netherlands Antilles, Niger, Nigeria, Puerto Rico, Republic of the Congo, Russian Federation, Rwanda, Saint Helena, Saint Vincent and the Grenadines, Senegal, Seychelles, Sierra Leone, Somalia, Suriname, Swaziland, Tanzania, Togo, Tunisia, Turkey, Uganda, Venezuela, Virgin Islands (U. Here you will find guidance on how to make your home more comfortable and energy efficient using heating controls.

If the MoMo does not close because the power has failed then the boiler will also have lost power and shut down. 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.With careful disassembling and fettling you can re-attach the spring by hooking it through the baseplate hole.

Yes, I do keep a second momo to hand, ready to install, but so far I have not needed to make use of the spare momo. Credit subject to status, UK residents only, Toolstation Ltd, acts as a broker and offers finance from a restricted range of finance providers, PayPal Credit is a trading name of PayPal UK Ltd, Whittaker House, Whittaker Avenue, Richmond-Upon-Thames, Surrey, United Kingdom, TW9 1EH. Yes I know in some systems the boiler is controlled by a micro switch in the valve actuator(s) indicating that a valve is open and heat is needed. Here you can find useful information, training modules and wiring diagrams to help with your day-to-day job.I am replacing an actuator on a Drayton 8-718-684-238 which is fitted in my Worcester Greenstar Heatwave 25/32 oil boiler.