FlexTherm FLR240 Relay for Wire Heating Exceeding 15A

FLR240 Relay for Wire Heating Exceeding 15A by FlexTherm


FlexTherm FLR240 Relay Expansion for Thermostats controlling heated floors with heating wire exceeding 15A load

  • Heavy duty 240 VAC power relay
  • Allows control of heating system wire loads over 15A up to 24A
  • 2-pole relay controls up to 5760 watts
  • Can be used with virtually any thermostat
  • Specified part for larger FlexTherm heating wires/mattes

FlexTherm FLR240 Relay for Wire Heating Exceeding 15A


The FLR240 is specifically recommended to allow control of heat wires sets that exceed a 15A load (maximum that the thermostat can handle on its own.) However, if the installation will control multiple heat mats that would exceed 24A, FlexTherm recommends use of TR1310 Slave Expansion Units instead.

  • Simple daisy chain installation
  • The FLP55 Concerto Connect and FLK50 Concerto thermostats can control up to 10 of these expansion units
  • Each unit supports a load of 15 A (the number of units required depends on the installation load)
  • Protection against malfunction ensured by a ground fault circuit interrupter (GFCI)
  • 3-year warranty


Operating voltage (50/60 Hz): 240 VAC
Maximum load: 5760 W @ 240 Vac / 24 A

Click here for visual electronic connection diagram FlexTherm_FLR240_Diagram

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Product Instruction/Manual Files

[pdf] FLP55_Installation_Guide_EN-FR_small.pdf
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