Honeywell L4188 Instruction Sheet

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INSTRUCTION SHEET1 MU1R-9023 0208R12-NEL4188/L6188A, B, C AND L4191/L6191A, BAQUASTAT CONTROLAPPLICATIONThe L4188/L6188 and L4191/L6191 aquastat thermostatsare sensitive direct immersion type water temperaturethermostats for limiting and controlling boiler watertemperature in hydronic heating systems.The L4188/L6188 aquastat thermostats are single aquastats.The L4191/L6191 aquastat thermostats are dual aquastatsi.e. two independent controls (controller and limiter housedunder a single cover).The L4188/L6188 and L4191/L6191 aquastat thermostatsconfirm with the following EC directives:Low Voltage Directive 73/23/EECElectro Magnetic Compatability Directive 89/336/EECCompliance with the EMC directive regarding emission canonly be determined in the application.SPECIFICATIONSModelSee table 1 page 2Ambient temperature0 ... 70 °CCapillary length0.22 m, 1 m, or 1.5 mElectrical connection6.3 mm quick connect terminals suitable for 1 /4 ” receptacles.The L6188 and L6191 series thermostats are provided withadapters for screw connectionElectrical rating10 A at 250 Vac, resistive load2.5 A at 250 Vac, inductive load15 A at 250 Vac, locked rotor2 A at 24 Vac, inductive load250 mA at 30 mVdc (special option)Terminal data (see fig.1 and 2 )C-1 breaks on temperature rise (SPST and SPDT)C-2 makes on temperature rise (SPDT only)Immersion wells (must be ordered separately for bulk packaquastats)** Insertion length including thread of brass spudMaximum well pressure: 10 bar for single and multi wells(ND 10)Type Insertionlength (mm)Thread** Order numberSingle 105 1 / 2” BSPT 45.900.409-003169 1 / 2” BSPT 45.900.409-006Dual 105 1 / 2” BSPT 45.900.409-007

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