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W6215, W7215, W7460 ECONOMIZER LOGIC MODULES
15
63-2544—3
Fig. 14. W7215B used in two-stage cooling system with Honeywell Series 72 Actuator.
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING.
ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA
LOAD OF THE ECONOMIZER AND ACTUATOR.
1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED
BY A 24 VAC INPUT.
M11810A
P1
P
T1
1
3
4
2
5
2K
S
1
2
3
3
4
TR
TR1
SO
SR
+
+
W7215B
+
6
1K
4
5
T
6
7
8
5
1S
1S1
C7150B MIXED
AIR OR
C7046A
DISCHARGE
AIR SENSOR
620 OHM
RESISTOR
FOR THE ML7295A,C, USE THE 4-20 mA MODEL ACTUATOR. THESE MODELS
HAVE 500 OHM INPUT IMPEDENCE THAT ALLOWS THE ACTUATOR TO
ACCEPT A 2-10 VDC SIGNAL.
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.
FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER.
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
UNOCCUPIED
ST6008
TIMER
L1
(HOT)
L2
FDR
FDR
FAN
HEAT 1
HEAT 2
COOL 1
HVAC EQUIPMENT
TERMINAL STRIP
T7300 OR T874
THERMOSTAT
1
C
G
W1
Y1
Y2
R
W2
RC
RH
G
X
W1
Y1
Y2
W2
OCCUPIED
7
8
2
COOL 2
24 VAC HOT
24 VAC COM
FAN
DELAY
RELAY
W
R
T6031 AMBIENT
LOCKOUT
CONTROL
50
°
F SETPOINT
2-10V
OUT
+
–
MINIMUM POSITION
ADJUSTMENT
HONEYWELL
SERIES 72
ACTUATOR
(ML7275,
ML7285,
ML7295A,C
M7275,
M7285)
+
–
Q1
Q
AQ1
AQ
UNIT
CONTROL
EXHAUST
FAN
INDOOR
FAN
+
–
2-10 VDC
INDOOR
AIR SENSOR
+
–
2-10 VDC
OUTDOOR
AIR SENSOR
ALARM
FREE
COOL
SHUT DOWN
AIR CHANGE
SD
SD1
AC
AC1
OA
OA1
MAXIMUM
POSITION
ADJUSTMENT