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Setup: Vaillant EcoTec 637 with 2 Honeywell Valves (one for cylinder / one for CH) into the VR66 and Boiler/VR66/Controller connected via eBus.
I recently tried to swap out a VRT350 with a VSmart. The VR66 was wired for a single zone, and the VRT350 switched a Honeywell Valve on the CH flow. The VSmart doesn't seem to open the CH valve switch (on a relay) when there's a CH demand.
I've disconnected the valve and left it open (it's not really needed anyway) - and moved the VR66 board dial from 0 to 1 (multi/monozone). This doesn't cause a great problem, but I was curious as to why the VSmart wasn't able to perform the open of the valve?
I recently tried to swap out a VRT350 with a VSmart. The VR66 was wired for a single zone, and the VRT350 switched a Honeywell Valve on the CH flow. The VSmart doesn't seem to open the CH valve switch (on a relay) when there's a CH demand.
I've disconnected the valve and left it open (it's not really needed anyway) - and moved the VR66 board dial from 0 to 1 (multi/monozone). This doesn't cause a great problem, but I was curious as to why the VSmart wasn't able to perform the open of the valve?