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My system is valiant ectoc plus 428 unistor 310 vr 65 vrt 360 f grundfos 15/60. I sometimes have a problem with s 53, it has reduced since reading this forum. I usually get it if heating has been on a while, then hot water kicks in. If I reset the boiler several times it is fine. I had...

I have the same alarm, about the same age, I recently added a veritas speech/text dialer, works great, phones me when a alarm triggers. It cab setup tophone several people, mobile and land line.

Hi folks thanks for update. I don't put up much hope of installer coming back. I take it when you talk of balancing the HW,flow it would be by putting a gate valve in the flow to coil and reducing the flow. IF there should be 2 way valve in HW circuit, I take it the 3 way valve would be...

The valve is not in mid position when both HW and CH is asked for.

Thanks for the help, pump is a Grundfos 15/60, set at speed 3. Piped with 22mm then 15mm. There is no 2 way valve HW system. From pump to a 3 way valve, splits to CH and HW. I wasn't sure what was mean't by there was no d 70 in the 400 series as when I scroll through boiler menu there is a...

Sorry it is a Vaillant ecotec plus 428.

The default setup is HW priority, but setup on the ectec boiler has been changed from "0" to "1" to enable parallel operation. Appears not to work.

Hi My first post on this great site. My system is a Vaillant ectoc plus 28 unistor VR 65 VRT 360 f Honeywell V4073A Mid Valve. Main problem is when I have hot water and heating on system will only heat the HW, once HW is up to temp, CH will then heat up. The VR 65 is wired up as per...