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Zone controls

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Caleffi’s ZSR101 series of zone controls for hydronic heating offer single relay control with two outputs for operating a 120 VAC pump with boiler enable, or two 120 VAC devices without boiler enable. They feature rear knock outs for 4×4 junction box mounting, a pre-installed jumper for pump operation and 10 amp total load rating. The controls are compatible with 2, 3 and 4-wire thermostats or other low voltage controllers with switching action.
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