KMC Controls BAC-4000 series, Installation, Operation, And Application Manual

Page: 28 / 128

Connecting an economizer
The following diagram shows the connections for an economizer. The damper
control signal is a 0-10 volt analog output.
Illustration 2–12 Wiring for an economizer
0-10
VDC
24 VAC
MS/TP
+B
–A
RS
OAT
GND
DAT
ECON
G
Y1
Y2
RC
W1
W2
RH
AO6
AO7
COM
24VAC
Connecting power
The AppStat requires an external, 24 volt, AC power source. Use the
following guidelines when choosing and wiring transformers.
Use only a Class-2 transformer of the appropriate size to supply power.
KMC Controls recommends powering the AppStat from a dedicated
controls transformer.
Connect the transformer’s neutral lead to the COM terminal.
Connect the AC phase lead to the 24VAC terminal.
Power is applied to the controller when the transformer is powered.
See
Installation accessories on page 12
for a list of transformers available from
KMC Controls, Inc.
Section 2: Installing the AppStat KMC Controls, Inc.
28 Revision G