Table of Contents
Advertisement
T7200/T7300/Q7300
WIRING DIAGRAMS
Fig. 32—T7300/Q7300A,B,G defeating economizer minimum position during unoccupied period in a
2-stage cool system with single enthalpy changeover using W7459A/C7400 with an M7415 actuator.
ENTHALPY
A1
A2
X
Y1
Y2
W2
W1
G
RH
RC
T7300/Q7300
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTIONS AS REQUIRED. 24 VAC SECONDARY.
2
ASSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER, ACTUATOR AND T7300/Q7300.
3
1S, AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT.
4
RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D.
5
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF C7400 ENTHALPY SENSOR IS ADDED
TO SR AND + FOR DIFFERENTIAL ENTHALPY.
6
FIELD INSTALLED JUMPER.
63-4038—7
TR
+
SO
SENSOR
C7400
S
SR
620 OHM
5
RESISTOR
C7150B MIXED
OR DISCHARGE
AIR SENSOR
W
T6301 AMBIENT
R
LOCKOUT CONTROL
6
W7459A ECONOMIZER PACKAGE
TR1
+
+
5
1K
4
2
1
2K
3
4
T
T1
P
P1
MINIMUM POSITION
ADJUSTMENT
C
COOL 1
Y1
Y2
COOL 2
W2
HEAT 2
W1
HEAT 1
G
FAN
R
HVAC EQUIPMENT
TERMINAL STRIP
30
M7415 ACTUATOR
TR
TR1
18
3
T
1S1
T1
P1
P
TR
24 VAC
TR1
T1
SENSOR
T
P1
MIN
POS
P
M7415
L1
(HOT)
L2
1
2
M4392
Advertisement
Table of Contents
