Damper Tracking (Master/Slave) - KMC Controls CTE-5202 Application Manual

Damper Tracking (Master/Slave)

The configuration is used for special applications
where a differential pressure is needed (either posi-
tive or negative). The thermostat controls the "mas-
ter" CEP-4xxx controller-actuator and an 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 offset.
3000
fpm
Max.
Air
Flow
Min.
0 fpm
Setpoint
(Colder Room Temperature
24 VAC @ 20 VA
(Neutral) –
(Phase) ~
Pressure Independent VAV Applications with CEP/CSP-4000 Series
Slave Flow (– DP)
Master Flow
Slave Flow (+ DP)
Warmer)
CEP-4xxx
Controller-Actuator
8
7
9
6
10
5
11
4
12
3
13
2
14
1
1
2
3
SSE-1001/1002
Flow Sensor
8
7
9
6
10
5
11
4
12
3
13
2
14
1
1
2
3
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 "offset"
would be 0.10 VDC to set-up the REE-1013. See the
Voltage/Velocity Correlation section in the
Series Applications
maximum offset is ±2 VDC as measured by a voltme-
ter between the + and – terminals.)
CTE-5202
Thermostat
51
Guide. With the REE-1013, the
Select Sequence 1 (from the
CTE-5202 SYSTEM menu).
See Change Configuration on
page 6. (This replaces a
CTE-1101 with Direct Acting
reset.)
NOTE: Manufacturing of
the REE-1013 was
discontinued in
October 2013.
Select Sequence 1
REE-1013
Offset Relay
Meter
Reading
for Offset
Adjustment
4 6 + –
Slave Offset
Increase
Master
4 5 2
CTE-5202 Applications Guide, AN0912A Rev. D
CEP-4000