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ST-21 Central Heating Pump Controllers with LED Display

The ST-21 controller is intended for controlling the circulation pump in the heating installation. The controller's job is to turn the pump on when the temperature exceeds the set value and turn it...
 (image for) ST-21 Central Heating Pump Controllers with LED Display 49.00 €
incl. 19% VAT
plus shipping and handling

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Valve Controller EU-I-1 (ST-431N) (DE.100 V1)

Functions performed by the controller: - smooth control of the three- and four-way valve - pump operation control - possible control of two valves by means of additional ST-61 modules - return...
 (image for) Valve Controller EU-I-1 (ST-431N) (DE.100 V1) 199.00 €
incl. 19% VAT
plus shipping and handling

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