Pressure Independent VAV Applications with CEP/CSP-4000 Series
47
CTE-5202 Applications Guide, AN0912A Rev. D
Cooling with 3-Stage Reheat
The application below uses an SSE-1000 series sen-
sor, an REE-4001/5001 relay module, and three 24
VAC contactors for three stages of reheat.
The transformer must supply a minimum of 10 VA
plus the requirements for the reheat contactor coils
(10 VA maximum per stage).
As the temperature drops below setpoint, the first
stage of reheat begins. If the temperature continues
to drop, the second stage begins, and finally the
third stage if necessary.
Select Sequence
2
(from the
CTE-5202
SYSTEM
menu).
See
. (This replaces
a
CTE-1004 or a CTE-5002/5012
thermostat.)
If no Auxiliary Flow is desired,
set
AO1 AUX
to 0 in the
LIMITS
menu.)
~
T
T
AI1
AO
1
AO
2
CTE-5202
Thermostat
24 VAC @ 40 VA
~
–
(Phase)
(Neutral)
1
2
3
7
6
5
4
3
2
1
8
9
10
11
12
13
14
CEP-4xxx
Controller-Actuator
SSE-1001/1002
Flow Sensor
REE-4001/5001
Relay Module
~
–
24 V
AC
3
2
1
Stages
3-Stage Reheat
T
24 VAC Contactors
(10 VA Max. per Stage)
2
1
3
Load
Select Sequence 2
NOTE: Triac outputs on the
REE-4001/5001 are for
24 VAC loads only.
The phase side of the
transformer connects to
the “common” side of the
load (contactors).
NOTE: See also the
and/or
2° F
Of Loop
10%
2° F
AO1 MAX
AUX
AO1 MIN
COLD AIR SEQUENCE
0 Volts
12 Volts
Temp. Increasing
Cooling
Setpoint
Heating
Setpoint
9.5 V
3.5 V
#3
#1
6.5 V
#2
Reheat
Stages
AO2 (RA)
AO1 (DA)