Pressure Independent VAV Applications with CSP-5001/5002
34
CTE-5202 Applications Guide, AN0912A Rev. D
Auto and Override (to Fully Closed or Fully Open)
CSP-5001
Controller-Actuator
H
~
16
V
DC
I
N
O
U
T
–
–
L
24 VAC
(To Flow Sensor)
24 VAC @ 4 VA
~
–
~
T
T
AI1
AO
1
AO
2
CTE-5202
Thermostat
(Phase)
(Neutral)
SPDT
Relay
CSP-5001
Controller-Actuator
H
~
16
V
DC
I
N
O
U
T
–
–
L
24 VAC
(To Flow Sensor)
24 VAC @ 4 VA
~
–
(Phase)
(Neutral)
SPDT
Relay
~
T
T
AI1
AO
1
AO
2
CTE-5202
Thermostat
Adding a SPDT relay or switch enables overriding
the air flow to fully open or fully closed. (Otherwise
the examples below are the same as the
cooling
.)
The “Override to Fully Closed” wiring diagram
below allows the CTE-5202 thermostat to control the
CSP-5001 controller as normal (auto) or override the
flow setting to fully closed.
The SPDT relay selects one of the two modes (Auto/
Fully Closed). In the relay position shown below, the
controller will override the flow setting. (Jumping
“–” and “IN” drives the CSP-5001 fully closed.)
NOTE: If a minimum limit was set in the CSP-500x
controller, the damper will only close to the
minimum limit setting.
When the relay switches to Auto, the thermostat will
then control the VAV box based on demand.
The “Override to Fully Open” wiring illustration
below allows the CTE-5202 thermostat to control the
CSP-5001 controller as normal (Auto) or override the
flow setting to fully open.
In the relay position shown, the controller will over-
ride the flow setting. (Jumping “16 VDC” and “IN”
drives the CSP-5001 fully open.)
NOTE: If a maximum limit was set in the CSP-500x
controller, the damper will only open to the
maximum limit setting.
When the relay switches to Auto, the thermostat will
control the VAV box based on demand.
(See also the Auto, Override to Fully Closed, or
Override to Fully Open section with a CTE-5101 in
the
CSP-5001/5002 Applications Guide
Override to Closed
Override to Open
Select Sequence 1
Open
Close
Auto
Auto