Cooling Or Heating - KMC Controls CTE-5202 Application Manual

Cooling or Heating

CTE-5202 thermostats can use CSP-4702 electronic
VAV controllers to operate damper boxes in the
pressure-independent VAV system. As shown in
the diagram, a "requested flow" voltage signal
(AO1) is connected to the CSP-4702 to adjust airflow
from minimum to maximum flow according to
space demand. Minimum and maximum flow limit
adjustments can be made at the thermostat or at the
controller.
For cooling, select Sequence 1 (from the CTE-5202
SYSTEM menu). See
page 6.
CSP-4702
Controller-Actuator
24 VAC @ 5 VA
(Phase)
(Neutral)
Air
Flow
Cooling Min.
Setpoint
(Colder Room Temperature
Select Sequence 1
Pressure Independent VAV Applications with CSP-4702
Change Configuration on
(To Flow Sensor)
~
–
Cooling Air
AO1
Signal
Cooling Max.
Warmer)
For heating, connect a 5K to 10K ohm resistor
between Common and AI1. Select Sequence 1 and
lower the Changeover to the lowest setting (55° F).
See Change Configuration on page
simulates a changeover sensor and puts the thermo-
stat in Reverse Acting mode.
NOTE: If the resistor value is too high, the
thermostat will not go into RA mode. If
the resistor value is too low, the thermostat
may go into setback mode.
CTE-5202
Thermostat
Heating Air
Heating Max.
Air
Flow
(Colder Room Temperature
Select Sequence 1
AND Set Changeover to 55° F
22
6. The resistor
Select
Sequence 1
(5K–10K
Ohm Resistor
between AI1
and Common
for Heating
Mode Only)
AO1
Signal
Heating Min.
Setpoint
Warmer)
CTE-5202 Applications Guide, AN0912A Rev. D