Bryant 581A/B User Manual
Page 136
136
TYPICAL WIRING SCHEMATICS — 581B (cont)
LEGEND
IAQ — Indoor Air Quality
LA
— Low Ambient Lockout Device
POT — Potentiometer
OAT — Outdoor-Air Temperature
RAT — Return-Air Temperature
EconoMi$er IV Wiring — 581B036-150 Units
NOTE:
Potentiometer Defaults Settings:
Power Exhaust
Middle
Minimum Pos.
Fully Closed
DCV Max.
Middle
DCV Set
Middle
Enthalpy
C Setting
ECONOMIZER NOTES:
1. 620 ohm, 1 watt 5% resister should be removed only when using differential
enthalpy or dry bulb.
2. If a separate field supplied 24v transformer is used for the IAQ sensor
power supply, it cannot have the secondary of the transformer grounded.
3. For field installed remote minimum position POT, remove black wire jumper
between P and P1 and set control minimum position POT to the minimum
position.
EconoMi$er2 Wiring — 581B036-150 Units
a48-7910
4
3
5
2
8
6
7
1
10
11
9
12
PINK
VIOLET
BLACK
BLUE
YELLOW
NOTE 1
NOTE 2
RUN
500 OHM
RESISTOR
-
+
OPTIONAL CO
SENSOR 4 - 20 mA
OUTPUT
50HJ540573
ACTUATOR
ASSEMBLY
RED
WHITE
ECONOMISER2 PLUG
DIRECT DRIVE
ACTUATOR
2
a48-8209
NOTES:
1. Switch on actuator must be in run position for economizer to operate.
2. 50HJ540573 actuator consists of the 50HJ540567 actuator and a harness with 500-ohm resistor.
581
B0
36
-15
0