Honeywell Design and Application - Page 86

Section 8- W6215, W7215 And W7460 Economizer Modules
63-8594-02 Honeywell Economizers 80
W7460A used in two-stage cooling system with 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.
1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN
POWERED BY A 24 VAC INPUT.
FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF
THE TIMER.
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR
SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY
SENSOR IS ADDED TO S
R
AND + FOR DIFFERENTIAL
ENTHALPY.
FOR T7300 ONLY.
M11802C
P1
P
T1
1
3
4
2
5
2K
S
1
2
3
TR
TR1
S
O
S
R
+
+
W7460A
+
5
1K
4
5
3
T
6
1S
1S1
C7150B
MIXED AIR
OR C7046A
DISCHARGE
AIR SENSOR
620 OHM
RESISTOR
MINIMUM POSITION
ADJUSTMENT
MAXIMUM
POSITION
ADJUSTMENT
Q1
Q
AQ1
AQ
SD1
AC1
PG1
SD
AC
PG
FREE
COOL
UNIT
CONTROL
EXHAUST
FAN
INDOOR
FAN
+
_
2-10 VDC
INDOOR
AIR SENSOR
SHUT DOWN
PURGE
AIR CHANGE
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
6
4
2
COOL 2
FAN
DELAY
RELAY
W
R
T6031 AMBIENT
LOCKOUT
CONTROL
50 F SETPOINT
M7415
OUT
+
Ð
L1
(HOT)
L2
1
P1
P
M7415
TR
TR1