Gestra LRR 1-40 24V electronic board
Gestra
Ürün No: LRR 1-40 24V electronic board
Üretici: Gestra
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Datasheets for Gestra LRR 1-40 24V electronic board
Description for Gestra LRR 1-40 24V electronic board
Description The continuous blowdown controller LRR 140 used in conjunction with the conductivity sensing electrode LRG 1640 constitutes a conductivity (TDS) monitoring and control system. Electrical conductivity is used to measure boiler water TDS (= Total Dissolved Solids). The blowdown controller features the following functions: ■ Two conductivity limits with one switchpoint each: TDS high (max) alarm and TDS low (min) alarm. The TDS low (min) alarm can alternatively be used to control an intermittent blowdown valve. ■ Threeposition control within a predefined proportional band. ■ TDS level (conductivity) monitored and maintained within a predefined control range. ■ Standby input. ■ 24 h purging pulse for continuous boiler blowdown. The LRR 140 can, by choice, be provided with an actual value output with a standard signal of 4 20 mA. The TDS data are transferred to the controller or another system component via a CAN data bus. The controller and the conductivity sensing electrode use the CANopen protocol.
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