Honeywell W6215 Series Product Data page 11

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.
Fig. 10. W7215A used in single-stage cooling system with single enthalpy changeover and Honeywell Series 72 Actuator.
W7215A
24 VAC HOT
24 VAC COM
1S
4
+
2-10 VDC
OUT
1S1
–
MINIMUM POSITION
ADJUSTMENT
5
FREE
COOL MAXIMUM
POSITION
ADJUSTMENT
UNIT
CONTROL
EXHAUST
FAN
INDOOR
FAN
T6031 AMBIENT
W
LOCKOUT
CONTROL
R
50° F SETPOINT
W6215, W7215, W7460 ECONOMIZER LOGIC MODULES
TR1
TR
+
S O
+
620 OHM
S R
RESISTOR
6
5
1K
2
1
4
3
2K
C7150B MIXED
AIR OR
T1
T
C7046A
DISCHARGE
AIR SENSOR
P1
P
Q1
Q
–
2-10 VDC
AQ
AQ1
INDOOR
+
AIR SENSOR
SD
SD1
SHUT DOWN
AC
AC1
AIR CHANGE
PG
PG1
PURGE
C
Y1
W2
W1
G
R
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 THERMOSTATS ONLY.
11
C7400
+
OUTDOOR
AIR
ENTHALPY
S
SENSOR
9
9
UNOCCUPIED
8
COOL 1
ST6008
TIMER
OCCUPIED
HEAT 2
HEAT 1
FAN
DELAY
RELAY
FDR
FAN
FDR
2
3
L2
1
L1
(HOT)
M11804A
63-2544—3