Heat Sequencers

Heat Sequencers
The positive temperature coefficient (PTC) heater element provides voltage compensation over a wide voltage range without danger of over-heating at high voltage. It is self-current limiting, and assures device actuation under low voltage conditions. The PTC has a unique feature of always stabilizing temperature, regardless of ambient temperature or voltage range.

  • Solid state PTC heaters
  • Replaces most Klixon & TOD brands
  • Quick-connect terminals
  • Shock and vibration resistant
  • Mounts in any position
  • Contact ratings – to 25 Amps at 120 or 
  • 240 Volts, and 12.5A at 480 Volts
  • Full-load rated auxiliary contacts
  • Custom timings available
  • UL File E237660, UL873; CSA approved
  • Coil Data
    • Standard Operating Ambiance Between – 50° F (-45.5°C) and 165° F (73.8°C)
    • 24 VAC
    • Inrush current: 0.75 A
    • Steady sate current: 0.16 – 0.20 A
  • Sequencing of heater banks in:
    • Electric furnaces
    • Baseboard, duct and suspension heaters
    • Recreational vehicle blower and element control
    • Heat pump blower and heating element control
    • Motor speed switching in air conditioning (high speed) / heating systems (low speed) where a single set of contacts handle combination motor and heater element loading in the heating function.
    • Control circuits requiring definite sequence on both start up and shut down
24ZC-15
The 24ZC-15 utilizes a single bi-metal disc in a single pole double throw configuration. The SPDT switch action allows for a single set of timings. Mainly used in heat pump air handlers by providing a delay to the blower motor in cooling mode.

Product Details

Catalog Number Description Case Quantity
24ZC-1 Timings: 1, On 1-20, Off 40-110; Switches: 1; Action: SPST 160
24ZC-2 Timings: 1, On 30-90, Off 1-30; Switches: 1; Action: SPST 160
24ZC-3 Timings: 1, On 1-20, Off 40-110; Switches: 2; Action: DPST 160
24ZC-4 Timings: 1, On 30-90, Off 1-30; Switches: 2; Action: DPST 160
24ZC-5 Timings: 2, On 1-110, Off 1-110; Switches: 3; Action: 1 SPST/ 1 DPST 80
24ZC-6 Timings: 2, On 1-110, Off 1-110; Switches: 4; Action: 2 DPST 80