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Section 8- W6215, W7215 And W7460 Economizer Modules
HONEYWELL
SERIES 72
ACTUATOR
(ML7275,
ML7285,
ML7295A,C
M7275,
M7285)
Y1
Y2
W2
W1
G
RH
RC
7
X
T7300 OR T874
THERMOSTAT
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING.
3
ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA
LOAD OF THE ECONOMIZER AND ACTUATOR.
1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED
4
BY A 24 VAC INPUT.
5
FOR THE ML7295A,C, USE THE 4-20mA MODEL ACTUATOR. THESE
MODELS HAVE 500 OHM INPUT IMPEDENCE THAT ALLOWS THE
ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL.
63-8594-02 Honeywell Economizers
W6215, W7215 and W7460 Wiring Diagram
W7215A
24 VAC HOT
24 VAC COM
4
+
+
2-10 VDC
OUT
–
–
MINIMUM POSITION
ADJUSTMENT
5
FREE
COOL
UNIT
CONTROL
EXHAUST
FAN
INDOOR
FAN
T6031 AMBIENT
W
LOCKOUT
CONTROL
R
50 F SETPOINT
W7215A used in single-stage cooling system with single
enthalpy changeover and Honeywell Series 72 Actuator
TR1
TR
+
S O
+
S R
5
1K
2
1
1S
4
3
2K
T
T1
1S1
P1
P
Q1
Q
MAXIMUM
POSITION
AQ
ADJUSTMENT
AQ1
SD
SD1
AC
AC1
PG
PG1
HVAC EQUIPMENT
TERMINAL STRIP
6
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE
REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE
WITH SINGLE-STAGE COOLING SYSTEMS OR SINGLE-STAGE COOLING
THERMOSTATS.
7
FOR T7300 ONLY.
8
FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER.
9
FOR TWO-STAGE COMMERCIAL THERMOSTATS ONLY.
78
C7400
OUTDOOR
+
AIR
ENTHALPY
S
SENSOR
620 OHM
RESISTOR
6
9
9
C7150B
MIXED AIR
OR C7046A
DISCHARGE
AIR SENSOR
–
2-10 VDC
INDOOR
+
AIR SENSOR
SHUT DOWN
AIR CHANGE
PURGE
C
Y1
COOL 1
HEAT 2
W2
HEAT 1
W1
FAN
DELAY
RELAY
FDR
G
FAN
FDR
2
R
8
UNOCCUPIED
ST6008
TIMER
OCCUPIED
3
L2
1
L1
(HOT)
M11804B
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