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