Solid state economizer system – Honeywell M8405 User Manual
Page 28
SOLID STATE ECONOMIZER SYSTEM
63-2484—2
28
Fig. 35. W7213, W7214 controlling heat pump system.
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE.
FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A
C7400 ENTHALPY SENSOR IS ADDED TO SR AND SR+ FOR DIFFERENTIAL ENTHALPY.
T7300 TERMINALS A2 AND A3 ARE CONNECTED WHEN THERMOSTAT IS IN THE UNOCCUPIED MODE.
SEE WIRING DIAGRAMS FOR T7350 AND TB7220/TB8220.
W7213: B TERMINAL
W7214: O TERMINAL
M24222
1
2
3
4
5
4
5
5
L1
(HOT)
L2
FAN
HEAT 1
HEAT 2
COOL 1
COOL 2
HVAC EQUIPMENT
TERMINAL STRIP
T7300
THERMOSTAT
1
C
G
W1
Y1
Y2
R
W2
RC
G
X
O
O
W1
RH
Y1
Y2
A3
A2
W2
S
+
C7400
OUTDOOR
AIR
ENTHALPY
SENSOR
O
P1
T1
SR
SO
AQ
EF1
5
EF
3
4
2
1
TR
MINIMUM POSITION
ADJUSTMENT
P
T
N
AQ1
SO+
SR+
TR1
24 Vac
COM
24
Vac
HOT
–
+
3
2
620 OHM
RESISTOR
W7214
C7150B
DISCHARGE
AIR SENSOR
+
–
0/2-10 VDC
INDOOR AIR
SENSOR
EXHAUST
FAN
L1
(HOT)
L2
F
1
2
3
4
5
+
~
MS7XXX
HONEYWELL
ACTUATOR