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    Required settings for White Rogers Thermostat with Zone Valve

    My setup at home... Vanee Heat Exchangers (fresh air inbound preheated by exhaust air) then to: Hot water Coils (Actual heat supply) - Sheet metal box with snake of copper pipes inside where air passes through then to air cavity in floor. 2 way 4 wire Zone Valve normally closed (without 24...
  2. S

    Zone Valve not opening on demand

    House - Heat Exchangers with 2 way Honeywell Zone Valves (about 18 years old). On one exchanger the hot water stops flowing after the specified temp is reached.....so it appears.f If I turn up the thermostat then no flow (cold pipe into exchanger). If I turn the heat off then on again...
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