Applications Guide

CEP-4000 Series VAV Flow Controller-Actuators 14 Applications Guide
Cooling with 3-Stage Reheat
Chart 1 Chart 2
The CTE-1004 electronic thermostat is a dual setpoint
thermostat for heating (RA) and cooling (DA) ap-
plications. The application below uses an SSE-1000
series sensor, an REE-4001 relay module, and three
24 VAC contactors for three stages of reheat.
The transformer must supply a minimum of 14 VA
plus the requirements for the reheat contactor coils
(10 VA maximum per stage).
Chart 1 below shows the jumper between “T2”
and “A” on the thermostat was removed to prevent
auxiliary ow. (If auxiliary ow is not being used
you should rotate the auxiliary potentiometer fully
CCW to make sure it will not have an eect.) As the
temperature drops below setpoint, the rst stage of
reheat begins. If the temperature continues to drop,
the second stage begins, and nally the third stage if
necessary.
When the jumper is le on for auxiliary ow (Chart
2), a second minimum ow (Aux. Flow) may be set
before enabling the reheat stages.
(Former Ref. # APE-1-4005)
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