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W6215, W7215, W7460 ECONOMIZER LOGIC MODULES
25
63-2544—3
Fig. 24. W7215A controlling parallel-wired M7415 Motors.
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED. M7415 MOTOR MUST USE AN
INDEPENDENT TRANSFORMER.
ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING.
FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER.
1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED
BY A 24 VAC INPUT.
M11795A
P1
P
T1
1
3
4
2
5
2K
S
1
2
3
4
TR
TR1
SO
SR
+
+
W7215A
+
6
1K
4
T
5
6
7
1S
1S1
C7150B MIXED
AIR OR
C7046A
DISCHARGE
AIR SENSOR
620 OHM
RESISTOR
24 VAC HOT
24 VAC COM
MINIMUM POSITION
ADJUSTMENT
MAXIMUM
POSITION
ADJUSTMENT
Q1
Q
AQ1
AQ
SD1
AC1
PG1
SD
AC
PG
FREE
COOL
UNIT
CONTROL
EXHAUST
FAN
INDOOR
FAN
ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE LOAD
OF ALL ACTUATORS.
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD
BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED
TO SR AND + FOR DIFFERENTIAL ENTHALPY.
FOR T7300 ONLY.
+
–
2-10 VDC
INDOOR
AIR SENSOR
SHUT DOWN
PURGE
AIR CHANGE
2-10V
OUT
+
–
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
UNOCCUPIED
ST6008
TIMER
1
5
M7415
L1
(HOT)
L2
FDR
FDR
FAN
HEAT 1
HEAT 2
COOL 1
COOL 2
HVAC EQUIPMENT
TERMINAL STRIP
T7300 OR T874
THERMOSTAT
1
+
–
C
G
W1
Y1
Y2
R
W2
RC
G
X
W1
RH
Y1
Y2
W2
OCCUPIED
7
3
2
TR
P1
P
TR1
Q769C
M7415
+
–
TR
P1
P
TR1
Q769C