W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES
63-2569—04 6
WIRING
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
IMPORTANT
1. All wiring must comply with applicable local codes,
ordinances and regulations.
2. Refer to Figures 6 and 7 for typical wiring diagrams.
3. All inputs and outputs to the device must be 24 Vac
Class 2.
4. Ensure proper polarity of sensor connections.
Incorrect polarity negates the sensor signal.
NOTE: All connections with label designation ending in
1
(examples: TR1, P1) are ac/dc common connections.
Fig. 6. W7340 Typical Wiring.
P1
TR1
TR1
24 VAC
TR
TR
P
EXF
M23875
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
OPTIONAL REMOTE MINIMUM POSITION POTENTIOMETER.
WHEN USING C7400 ENTHALPY SENSORS, CONNECT THE ENTHALPY SENSOR TO THE
HUMIDITY SENSOR TERMINALS. LEAVE THE TEMPERATURE SENSOR TERMINALS EMPTY.
1
2
3
3
3
3
3
2
R
B
W
CCW
OPEN
MOD
BUS
CW
CLOSE
S963B
M7215
W7340
2-10 Vdc
FEEDBACK
OUTPUT
2-10 Vdc
CONTROL
SIGNAL INPUT
2-10 Vdc
FEEDBACK
INPUT
MIN POS/
DCV MIN
DCV
SETPOINT
2-10 Vdc
CONTROL
SIGNAL
OUTPUT
POWER
EXHAUST
CONTACTOR
MIXED
AIR TEMP
SENSOR
10K NTC
OUTDOOR
AIR TEMP
SENSOR
10K NTC
RETURN
AIR TEMP
SENSOR
10K NTC
C7600C
OUTDOOR
AIR
HUMIDITY
C7600C
RETURN
AIR
HUMIDITY
DCV
SENSOR
(0-10 Vdc)
MA
T
OAH
OA
T
RA
T
RAH
DCV
A
E
B
C
+
–
+
–
+
–
+
–
+
–
+
–
MOD BUS –
MOD BUS +
1
–
24 VAC
L1
L2
+
D
