Description

The CT Series combines a delay-on-make and delay-on-break

time delay into one unit and may be used to control fan delays

in heating and/or cooling equipment. The CT includes bypass

circuitry to allow it to operate with cooling anticipators ≥ 3000

ohms. It is designed to operate in 24VAC control circuits.

Several CT modules may be combined to provide sequencing of

any number of loads and sequencing off of the same loads, such

as electric heating elements.

Operation (Delay-on-Make/Delay-on-Break)

Forced Air Heating or Air Conditioning (as shown): When

the thermostat closes, the compressor relay is immediately

energized. At the end of a fixed delay-on-make delay (T1),

the fan relay is energized. When the thermostat opens, the

compressor relay is de-energized and the delay-on-break delay

is initiated. On completion of the fixed delay-on- break delay

(T2) the fan relay is de-energized. If the thermostat is reclosed

during the delay-on-break delay, the delay-on-break delay is reset

and the fan relay remains energized. If the thermostat is closed

when input voltage is applied, the delay-on-make delay (T1)

begins as normal.

Features & Benefits

FEATURES BENEFITS

Delay-on-Make and

Delay-on-Break in

one unit

Simplifies wiring and installation, and optimizes

efficiency of heating and cooling systems

Totally solid state

and encapsulated

No moving parts to arc and wear out over time and

encapsulated to protect against shock, vibration,

and humidity

Interconnectability with

other CT modules

Combine modules to provide sequencing on of

a number of loads and sequencing off of the

same loads