Fan Induction With 2-Stage Electric Heat - KMC Controls CTE-5202 Application Manual

Fan Induction with 2-Stage Electric Heat

In this fan induction application, the CTE-5202
thermostat is used with a REE-4002/5002 relay
module, a fan, and two coils (for two stages of heat).
The REE-4002/5002 was designed primarily for use
with VAV fan-powered induction boxes.
If the temperature drops below setpoint, the REE-
4002/5002 senses the decrease in voltage on AO2 and
starts the fan. As the temperature continues to drop,
the first stage of reheat begins, and the second stage
of reheat follows if the thermostat is still not satis-
fied. The process reverses as the room temperature
begins to rise.
12 V
8 V
6 V
Fan
3V
1 V
#2 #1
(Colder Room Temperature
Pressure Independent VAV Applications with CEP/CSP-4000 Series
AO2 Signal
AO1 Signal
Cooling
Max.
Cooling Min.
Setpoint
Warmer)
24 VAC @ 40 VA
–
(Neutral)
(Phase) ~
24 VAC Contactors
(10 VA Max. per Stage)
Sequence 1 should be selected from the CTE-5202
SYSTEM menu. See
(See also the Fan Box with Reheat section with a
CTE-1101 in the CEP-4000 Series Applications
Guide.)
NOTE: The REE-4002/5002 provides the fan an
adjustable start point. The "X" Terminal is
used for measuring fan trip voltage. See the
REE-5002 Installation Guide
4002 Installation Guide
NOTE: Triac outputs on the REE-4002/5002 are for
24 VAC loads only. The phase side of the
transformer connects to the "common" side
of the load (contactors).
Select Sequence 1
CEP-4xxx
Controller-Actuator
8
7
9
6
10
5
11
4
12
3
13
2
14
1
SSE-1001/1002
Flow Sensor
1
2
3
Heat Stage 2
Heat Stage 1
Fan
50
Change Configuration on page
or the
for details.
REE-4002/5002 Relay Module
CTE-5202 Applications Guide, AN0912A Rev. D
6.
REE-
CTE-5202
Thermostat