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Table 103 — Staged Gas Control Board (SCB) Inputs and Outputs
POINT
NAME
POINT DESCRIPTION
I/O POINT
NAME
PLUG AND PIN
REFERENCE
SIGNAL PIN(S)
PORT STATE
INPUTS
AN1
J5, 1-3
1=5v, 2=Vin, 3=GND (thermistor 1-2)
(0 to 5VDC, thermistor, ohms)
AN2
J5, 4-6
4=5v, 5=Vin, 6=GND (thermistor 4-5)
(0 to 5VDC, thermistor, ohms)
LAT1SGAS
Leaving air temperature 1
AN3
J5, 7-9
7=5v, 8=Vin, 9=GND (thermistor 7-8)
(0 to 5VDC, thermistor, ohms)
LAT2SGAS
Leaving air temperature 2
AN4
J5, 10-12
10=5v, 11=Vin, 12=GND (thermistor 10-11)
(0 to 5VDC, thermistor, ohms)
LAT3SGAS
Leaving air temperature 3
AN5
J5, 13-15
13=5v, 14=Vin, 15=GND (thermistor 13-14)
(0 to 5VDC, thermistor, ohms)
AN6
J6, 1-3
1=5v, 2=Vin, 3=GND (thermistor 1-2)
(0 to 5VDC, thermistor, ohms)
AN7
J6, 4-6
4=5v, 5=Vin, 6=GND (thermistor 4-5)
(0 to 5VDC, thermistor, ohms)
AN8
J6, 7-9
7=5v, 8=Vin, 9=GND (thermistor 7-8)
(0 to 5VDC, thermistor, ohms)
AN9
J7, 1-2
1
(thermistor, ohms)
AN10
J7, 3-4
3
(thermistor, ohms)
OUTPUTS
AO1
J8, 1-2
1=0 to 20mA, 2=GND
0 to 20mA OUT
AO2
J8, 3-4
3=0 to 20mA, 4=GND
0 to 20mA OUT
HS3
Heat Stage 3
RLY1
J9, 1-3
1 = 2 = RLY1A, 3 = RLY1B
1 = Closes RLY1A/RLY1B
HS4
Heat Stage 4
RLY 2
J9, 4-6
4 = 5 = RLY2A, 6 = RLY2B
1 = Closes RLY2A/RLY2B
HS5
Heat Stage 5
RLY 3
J9, 7-9
7 = 8 = RLY3A, 9 = RLY3B
1 = Closes RLY3A/RLY3B
HS6
Heat Stage 6
RLY 4
J9, 10-12
10 = 11= RLY4A, 12 = RLY4B
1 = Closes RLY4A/RLY4B
RLY 5
J9, 13-15
13 = 14 = RLY5A, 15 = RLY5B
1 = Closes RLY5A/RLY5B
Fig. 31 — Economizer Control Board (ECB1) and VAV Control Board (ECB2)
Summary of Contents for WEATHERMAKER 48A2020
Page 112: ...112 Fig 20 Typical Main Control Box Wiring Schematic 48 50A Units ...
Page 113: ...113 Fig 21 Typical Auxiliary Control Box Wiring Schematic ...
Page 114: ...114 Fig 22 Typical 2 Stage Gas Heat Wiring Schematic Size 060 Units Shown ...
Page 115: ...115 Fig 23 Typical Staged Gas Heat Wiring Schematic Size 060 Units Shown TO NEXT PAGE ...
Page 116: ...116 Fig 23 Typical Staged Gas Heat Wiring Schematic Size 060 Units Shown cont ...
Page 117: ...117 Fig 24 Typical Electric Heat Control Schematic 50 Series Size 060 Units Shown ...
Page 118: ...118 Fig 25 Typical Controls Option Wiring Schematic SW1 SW2 OR DEHUMIDIFY SWITCH ...
Page 119: ...119 Fig 26 Typical Power Schematic 48 50A2 A3 A4 A5 060 Unit Shown ...
Page 120: ...120 Fig 27 Typical Power Schematic of Greenspeed Low Ambient Option 48 50A 060 Unit Shown ...
Page 121: ...121 Fig 28 Typical Small Chassis Component Location Size 020 035 Units ...
Page 122: ...122 Fig 29 Typical Large Chassis Component Locations Size 040 060 Units ...
Page 185: ...185 APPENDIX C VFD INFORMATION cont Fig F Internal Enclosure Fan Replacement A48 7716 ...