Find links below to useful resources for Drives, Climate Solutions, High-Pressure Pumps, and Sensing Solutions product portfolios. While doing this a second micro switch allows power out of the valves orange wire to re start the boiler. Today I finally got round to replacing the 3-way valve body and put a new (but not tested) actuator head on as the old one had visible signs of water damage. My question is, does the HSA3 electrical wiring need to be connected in the junction box to complete the circuit for the CH ?

Wire (1) comes from the HW ON terminal, (goes via junction box) to cylinder stat, then across the stat, then from cylinder stat (via junction box ) to boiler/pump. Look out for features such as 24 hour or 7 day programmable models, 2 or 3 wire installation, frost protection and number of on/off periods per day.It may be that HW is not on so the grey would not become live and this is where the second source comes in. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.

The power to start boiler then comes from cylinder stat if HW is involved or the valves orange wire if HW not involved. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. The products will work with the majority of heating systems and can be used on new installations or added to existing systems. I was expecting the orange to become live once the valve had moved to the heating position but that’s not the case. The Danfoss port "H" motorised valve series, which includes the HSA3 Actuator, is suitable for use with both copper and iron pipes.

Danfoss HSA3 3-Port Mid Position Valve Actuator 63 x 86 x 73mm (H x W x D) White, made from brass is designed for use with both copper and iron pipes inside any heating devices. I'm going to double check the two valve heads that I have, to make sure I haven't missed something, but I expect them to both to be faulty. Note when replacing Sunvic SDM1901: This actuator is only suitable when the existing actuator is fixed to the valve by two screws. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. For the last few weeks I have had the 3way valve actuator wiring disconnected and have just been using the system for hot water.

normally this is fed from the HW off terminal in the programmer and the satisfied contact on the cylinder stat.I'd normally expect the orange to become live and connect to the boiler switched live but the diagram suggests the orange is just HW. Looking at the diagram, the grey doesn’t seem to go anywhere other than link to the cylinder stat off via the broken black line. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. When HW gets satisfied the cylinder stat breaks contact to boiler and switches power to the satisfied terminal of the stat.