Danfoss HSA3 3-Port Valve Actuator

Product Information

We provide a home delivery service through a number of leading courier agencies. Delivery charges are determined by how fragile, size and weight of the product(s) being delivered as follows: Note the CH and HW will now share the flow of water until one side becomes satisfied (usually HW) when the valve is then supposed to move to CH only.

A few weeks ago, I had some issues with my heating. The fault was found to be a damaged cable in the Kitchen wall, which was repaired / replaced. At the same time I found the 3-way valve in the airing cupboard to be leaking when set for heating. For the last few weeks I have had the 3way valve actuator wiring disconnected and have just been using the system for hot water. Going to use the HSA3 to replace the Sunvic SD2701. Am I correct to assume that the HSA3 Brown/white wire replaces the White wire in the SD2701. Blue, Grey, orange remain the same? 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.

I had a faulty actuator which I have now replaced, however I have lost the original wiring diagram that I made when removing the old unit from the junction box in the airing cupboard. My question is, does the HSA3 electrical wiring need to be connected in the junction box to complete the circuit for the CH ? 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.

The Danfoss port "H" motorised valve series, which includes the HSA3 Actuator, is suitable for use with both copper and iron pipes. The motor replacement head for the HS3 Valve bodies is the Danfoss HSA3 Actuator. By purchasing the actuator, you may just swap out the head of the device rather than having to replace the entire thing.

The power to start boiler then comes from cylinder stat if HW is involved or the valves orange wire if HW not involved. Wire (2) comes from the CH ON terminal, (goes via junction box) to the input side of the room stat, From the output side of room stat (goes via junction box ) to the white wire of valve. It may be that HW is not on so the grey would not become live and this is where the second source comes in.