Application Guide

Pressure Independent VAV Applications with CEP/CSP-4000 Series 51 CTE-5202 Applications Guide, AN0912A Rev. H
Damper Tracking (Master/Slave)
The conguration is used for special applications
where a dierential pressure is needed (either
positive or negative). The thermostat controls
the “master” CEP-4xxx controller-actuator and a
(discontinued) REE-1013 relay controls the “slave.”
The relay takes the voltage reading from the master
CEP-4xxx and repeats it to the slave CEP-4xxx plus
or minus a given oset.
As an example, the master CEP-4xxx is supplying
a velocity of 450 fpm (4.0 VDC on terminal 6), and
the relay commands the slave controller to exhaust
550 fpm (4.1 VDC). The amount of voltage “oset”
would be 0.10 VDC to set-up the REE-1013. See the
Voltage/Velocity Correlation section in the CEP-4000
Series Applications Guide. With the REE-1013, the
maximum oset is ±2 VDC as measured by a voltme-
ter between the + and – terminals.)
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~
T T
AI1
AO1 AO2
CTE-5202
Thermostat
24 VAC @ 20 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
1
2
3
7
6
5
4
3
2
1
8
9
10
11
12
13
14
4 5
6
Slave
4
2
–
Increase
+
Offset
Master
Meter
Reading
for Offset
Adjustment
REE-1013
Offset Relay
Select Sequence 1
Select Sequence 1 (from the
CTE-5202 SYSTEM menu).
See Change Conguration on
page 6. (This replaces a
CTE-1101 with Direct Acting
reset.)
NOTE: Manufacturing of
the REE-1013 was
discontinued in
October 2013.