下限冻结保护开关

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DWYER下限冻结保护开关DFS2

SeriesDFS2LowLimitFreezeProtectionSwitchprotectscoolingcoilsinairhandlersystemsbypreventingfrostbuildup.Thethermostatanditscapillarysensingelementprovideanantifreezefunctionbysensingthelowesttemperaturealonganyonefootsectionofcapillary.TheDPDTmanualorautomaticresetrelayssignalthebuildingmanagementsystemaswellascutoffthefan.TheSeriesDFS2willdetecttemperaturedropsbelowthefixedsafetyvalue(setpoint)whichcanbesetaslowas34F(1C)utilizingthevisualsetpointindicatorandsetpointscrew.

下限冻结保护开关

SensingElement：Vapor-filledcapillary.

OperatingTemperature：14Fto54F(-10Cto12C).

StorageTemperature：14Fto158F(-10Cto70C).

CapillaryOverloadTemperature：392F(200C)，maximum60minutes.

HumidityLimit：0to95%RH，non-condensing.

Enclosure：Galvanizedsteelbase，ABScover.

EnclosureRating：NEMA1(IP40).

CapillaryMaterial：Copper.

CableEntry：(1)M20compressionfitting.

ResetAction：Availableinautomaticormanualresetoptions.

Low-levelSetpoint：FactorySet：39F(4C)，andsafetylocksecured;Adjustmentviascrewdriverslot.

WireConnection：Terminalwithwire-retainingscrews.

WireSize：Max.14AWG.

ElectricalRating：24to250VAC，15(8)A.

ElectricalConnections：TwoeachNO/NC/Common.

Deadband：1.8F(fixed).

Weight：1.6lb(0.7kg).

AgencyApprovals：CE.