Application Guide

Pressure Independent VAV Applications with CEP/CSP-4000 Series 46 CTE-5202 Applications Guide, AN0912A Rev. H
~
T T
AI1
AO1 AO2
CTE-5202
Thermostat
24 VAC @ 10 VA
~
–
(Phase)
(Neutral)
7
6
5
4
3
2
1
8
9
10
11
12
13
14
CEP-4xxx
Controller-Actuator
SSE-2001/2002
Flow Sensor
SPDT Relay
1
2
3
Y
X
Select Sequence 1
Using the thermistor in an SSE-2001/2002 sensor
enables the sensing of morning warm-up, and
adding a SPDT relay or switch enables overriding
the air ow to fully open for morning warm-up.
Otherwise the example below is the same as the
conguration in Cooling on page 45.
The SPDT relay selects one of the two modes (Auto
or Fully Open). Terminal 6 on the CEP-4xxx is
connected to either Terminal 5 (Fully Open) or to AO1
on the CTE-5202 (Auto, the default). When Terminal
6 is connected to Terminal 5, the 9.1 VDC causes full
ow.
(See also the Cooling with Morning Warm-Up section
in the CEP-4000 Series Applications Guide.)
Cooling with Morning Warm-Up
2° F
2° F
2° F
COLD AIR SEQUENCE
AO1 (DA)
Setpoint
AO1 MIN
HOT AIR SEQUENCE (Morning Warm Up)
AO1 (RA)
AO1 MAX
AO1 MAX
AO1 MIN
Temp. Increasing
Setpoint