Anti-Short Cycle Timerm Solid State Cube Relay Timerm TH3AC Timers, Airotronics

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Anti-Short Cycle Timer - Solid State Cube Relay Timer - TH3AC Timers


Solid State Cube Relay Timer
TH3AC Timers

The TH3AC timers are an anti-short cycle timer with solid-state output for compressor protection. An optional "delay on make" function is offered for sequencing or prevention of contactor chatter. A simple 3 terminal connection and encapsulated 2" x 2" package.

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Timing Mode
When power is applied (thermostat closes) the load energizes. When power is removed the "lockout" time delay begins, preventing the load from turning on until the end of the delay. An optional "delay on make" is available, delaying the initial load output for up to 5 minutes.
FEATURES
  • 1 Amp current load
  • 10 Amps single AC cycle surge handling
  • 3 Operating voltages 24/120/230VAC
  • Factory fixed or potentiometer adjustable
  • Totally encapsulated for protection from harsh environments
  • Optional delay on make
  • 24 VAC unit has anticipator resistor-bypass circuit
  • Single screw mounting through center hole
  • Industry standard three terminal (.250") quick connects
  • 100% Operational testing before shipping
BASIC WIRING AND DIMENSIONS
SPECIFICATIONS
Input Voltage:
  • VAC: 24 (±20%)
  • VAC: 120/230, 50/60 Hz
Anticipator Resistor:
  • (24 VAC only)
  • 2000 ohms minimum
Time Delay: Up to 10 minutes

Lockout Time: Factory fixed or variable with knob on timer

Tolerance: +35%-15% of nominal time

Initiate Time: 16 milliseconds

Life Expectancy:
  • No predictable failure if used within operating parameters
Protection:
  • Transient Protection: 18 joules
  • Dielectric Strength: 1800 RMS 60 Hz

Temperature Ranges:

  • Storage: -40°C to + 85°C
  • Operating: -40°C to +70°C
  • Humidity: 95% relative
Physical Data: Surface mount with single #8 or #10 screw

Connection & Termination: 0.25" quick connects


SELECTION PROCEDURE
Mode of Operation Series Input
Voltage
Time Ranges Time Adjustment Method Options
Anti-Short
Cycle
(Lockout)
TH3AC
  1. 120 VAC
    50/60 Hz
  2. 230 VAC
    50/50 Hz
  3. 24 VAC
    50/60 Hz
VARIABLE TIME PERIODS
  1. Integral knob
      C     Factory fixed
SXXX   On delay (up to 5 min.)

  XXX   Time Period

  XXS   Time in sec.

  Example:
  30S = 30 second fixed time

  060 - 1 min.
0120 - 2 min.
0180 - 3 min.
0240 - 4 min.
0300 - 5 min.
  0600 - 10 min.
XXX -  fixed
FIXED TIME PERIODS
Any fixed time up to 10 minutes


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