multi zone hot water heating

Old 09-26-02, 02:39 AM
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multi zone hot water heating

hi folks
i live in a house that was previously a duplex , but with only one thermostat. i noticed four different zones ( four pipes with electicly controlled valves) all lead to a mess of white and red wires.
My question is this. what is the sequence of events that should happen to open the valves and make the pumps run so i can have heat in the different zones
Old 09-26-02, 08:04 AM
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In a zoned system, you should have a thermostat per zone. Having all zone valves connected to one single thermostat defeats the purpose of having separate zones.

Zoned systems work in the following sequence.

1) If the temperature drops below the thermostat setting in any zone(s), the furnace is turned on.

2) The zone valve(s) is opened up for the zone(s) that turned on the furnace.

3) The circulator pump turns on after the furnace has reached its operating temperature.

4) Both furnace and circulator pump will shut off when all zones are above their thermostat set points settings.

Regards TheZman

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