KMC Controls CSP-5002 - Manual (Page 15)

CSP-5001/5002 VAV Flow Controller-Actuators 15 Applications Guide, Rev. B
Cooling with Heating Changeover
NOTE: Minimums can be set at zero air flow, but a
minimum of greater than zero is required
for a quick changeover.
The CTE-5103 electronic thermostat is a dual set
point thermostat for heating (RA) and cooling
(DA) applications. When using an TTE-2001 (or
STE-1002/1004) duct sensor and an REE-1005 relay
module (as shown below), an automatic changeover
is provided for heating/cooling applications. The
sensor and relay combination will switch between
the “T1” (cooling) or “T2” (heating) signal to the
VAV terminal based on the temperature of the supply
air.
The factory-defined changeover temperature is 77° F
± 4° F. At duct temperature greater than changeover
temperature, “T2” is utilized to control heating.
Below the changeover, the relay switches allow “T1”
to control cooling. At 77°, voltage across terminals
“X” and “Y” is approximately 7.75 volts.
NOTE: REE-1005 terminal “A” can be used to
trigger an auxiliary setpoint when used
with a CTE-5104 or REE-1012. This terminal
can also be used to daisy chain more than
one REE-1005 together by wiring Terminal
“A” to Terminal “Y” on the next relay.
Heating
Max.
Heating Min.
0 fpm
( Colder Room Temperature Warmer )
3300
fpm
T2
Signal
Cooling
Max.
Cooling Min.
T1
Signal
Cooling Setpoint Heating Setpoint
Air
Flow
(Former Ref. # APE-1-5014)