Pressure Dependent VAV Applications with MEP-4002
18
CTE-5202 Applications Guide, AN0912A Rev. D
Other Applications
See the corresponding application in
Independent VAV Applications with CSP-5001/5002
and make the corresponding wiring adjust
-
ments for power to the MEP-4xx2 and CTE-5202.
The MEP-4xx2’s default direction is the same as the
CSP-5001.
~
T
T
AI1
AO
1
AO
2
CTE-5202
Thermostat
24 VAC @ 5 VA
~
–
(Phase)
(Neutral)
(5K–10K
Ohm Resistor
between AI1
and Common
for Heating
Mode Only)
NC SPST
Relay
(Override
to Fully
Closed)
MEP-4002
Actuator
24 V
A
C
Common
Input
Out
Auto and Override (to Fully Closed)
Adding a Normally Closed SPST relay or switch
enables overriding the air flow to fully closed.
(Otherwise the example below is the same as the
).
The default setting is Auto. When the NC relay
energizes, the thermostat signal is removed from the
actuator’s input. The resulting 0 VDC “signal” on
the actuator’s input overrides the actuator to fully
closed.
NOTE: An override to fully open does not apply
to the MEP-4xx2 in a way that is analogous
to the CSP-5001 as shown
in