Johnson Controls ZY Series - Page 115

Figure 31: SE-ECO1001-1 Economizer Controller
Table 75: Smart Equipment
™
Economizer Board Details
Board Label Cover Label Description Function and Comments
Directional orientation: viewed with the center text of the cover label upright
ANALOG INPUTS Terminal at left on upper edge of economizer board
C COM
24 VAC common/0-10 VDC negative for economizer
actuator position feedback
Connects through circuit trace to 24V~ IN pin COM
IN2 ECOFB
0-10 VDC positive input from Economizer actuator position
Feedback
EconDampPos parameter reports input status (0-100%). Used to meet Cali. Title
24 requirements for economizer actuator position feedback
R 24V~
24 VAC hot supplied for economizer actuator position
feedback
Connects through circuit trace to 24V~ IN pin HOT
C COM
IN1 MAT
Mixed Air Temperature sensor input from 10KΩ @ 77°F,
Type III negative temperature coefficient thermistor
MAT parameter reports input status (°F/°C), 3.65 VDC reading MAT (+) to COM
(−) with open circuit. Read-only use in current control revision.
LEDs at left on upper edge of economizer board
POWER POWER Green UCB power indicator Lit indicates 24 VAC is present at 24V~ IN COM and HOT pins
FAULT FAULT Red networking error and firmware error indicator
1/10th second on/off flashing indicates a networking error (polarity, addressing,
etc.) or a firmware error (likely correctable with re-loading from USB flash drive)
SA BUS SA BUS Green UCB SA bus communication transmission indicator
Lit/flickering indicates UCB-to-economizer board SA bus communication
is currently active, off indicates the economizer board is awaiting SA bus
communication
1
SA BUS Pin connections at left on upper edge of economizer board
C COM Common for SA BUS power and communication circuits
EconCtrlr parameter reports UCB-to-economizer board SA bus communication
status. Negative of the SA BUS communication circuit to the UCB. Through
the unit wiring harness, may continue on to the 4-stage board and/or fault
detection & diagnostics board
– – Communication for SA BUS devices
EconCtrlr parameter reports UCB-to-economizer board SA BUS communication
status. Positive of the VDC (typically, a fluctuating 1.5 to 3.5 volts reading to
C; at least 0.25 volts lower than +) SA BUS communication circuit to the UCB.
Through the unit wiring harness, may continue on to the 4-stage board and/or
fault detection & diagnostics board
+ + Communication for SA BUS devices
EconCtrlr parameter reports UCB-to-economizer board SA BUS communication
status. Positive of the VDC (typically, a fluctuating 1.5 to 3.5 volts reading to
C; at least 0.25 volts higher than –) SA BUS communication circuit to the UCB.
Through the unit wiring harness, may continue on to the 4-stage board and/or
fault detection & diagnostics board
INSTALLATION MANUAL ZY SERIES 3-10ton 60 Hertz R-410A 115
Johnson Controls Ducted Systems