hot water heating boiler

The plumber has the furnace & all the controls in place. The zone valves
have 4 wires , 2 red , 2 black. The four thermostats have 2 wires each. Can
any one send me a wiring diagram for this system , OR point me to a web page
that may help. I need to know where the 4 wires on the zone valve get
terminated. I think the thermostat wires go to the black wires on the zone
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Ronald Murray
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what voltage? There must be 100 manufactures out there for this equipment. With out specific information on the equipment any information would be a WAG
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