Hello all,   I have recently migrated from Homecenter 2 which had the equivalent setup as below, but without the issue described below.   I have the following - HC3 running 5.172.23 with Z-wave engine version 3 - HeatIt Z-water (the legacy version) included with S2 securit - HeatIt Thermostat included with S2 security   Current status - The thermostat controls through direct association the valve on Z-water (turning on when too cold, and off when