Pressure Independent VAV Applications with CSP-4702
28
CTE-5202 Applications Guide, AN0912A Rev. D
Cooling with Heating Changeover and Hot Water Reheat
Cooling with Heating Changeover and Electric
. This application operates the
same except for using a hot water valve instead of
electric heating elements for reheat (a
VEB-43/46
series valve in place of the REE-5001 relay).
2° F
Of Loop
10%
2° F
2° F
AO1 MIN
AO1 MAX
AO1 MAX
AO1 (RA)
HOT AIR SEQUENCE (Morning Warm Up)
AUX
AO1 MIN
COLD AIR SEQUENCE
0 Volts
12 Volts
AO2 Disabled
(0 Volts)
Temp. Increasing
Cooling
Setpoint
Heating
Setpoint
Heating
Setpoint
(Hot Water Reheat)
AO2 (RA)
AO1 (DA)
When there is hot air in the duct, changeover initi-
ates, allowing the heating signal from AO1 to control
airflow and AO2 to control the valve. When there
is a call for heat, the thermostat modulates the hot
water valve.
Select
Sequence 2
MEP-4002
Actuator on
VEB-43/46
Series
Valve
24 V
A
C
Common
Input
Out
~
T
T
AI1
AO
1
AO
2
CTE-5202
Thermostat
~
–
(Phase)
(Neutral)
(To Flow Sensor)
STE-140x Duct
Temp. Sensor
CSP-4702
Controller-Actuator
24 VAC @ 10 VA