Reference - Model IGX
(Blower Control Center)
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| 9 | 14 | 15 |
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| 3 | |
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| 12 | |
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| 4 |
| 10 |
1 | 6 | 7 |
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| 17 | 19 |
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2 |
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| 8 | 5 |
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| 13 | 18 16 11 | 20 |
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This is a typical blower control center, the control center in your unit may be different. Reference the ladder diagram on the inside of the control center door for a unit specific wiring diagram.
1.Supply Motor Starter - 24 volt magnetic contacts for starting supply motor.
2.Supply Overload - Provides electronic overload protection to supply motor.
3.Low Voltage Transformer - Provides low voltage to fan/heat/cooling enable controls.
4.Control Terminal Block - Provides wiring access to controls.
5.Fan Relay - Allows power to pass to energize motor starter.
6.Auxiliary Contact (Optional) - Provides one normally closed and one normally open contact for other equipment.
7.Exhaust Motor Starter (Optional) - 24 volt magnetic contacts for starting exhaust motor.
8.Exhaust Overload (Optional) - Provides electronic overload protection to exhaust motor.
9.Exhaust Fuses (Optional) - Provides proper fusing for exhaust fan motor(s).
10.Building Freeze Protection Timer (Optional) - Prevents the discharge of cold air into the building.
11.Heat Relay - Allows power to pass to heating controls.
12.Low Voltage Transformer - Provides low voltage to the optional evaporative cooling controls.
13.Inlet Air Sensor (Optional) - Outdoor air stat that automatically controls the heating and/or cooling based on outdoor air temperature.
14.Evaporative Cooling Fuses (Optional) - Provides proper fusing to evaporative cooling pump and controls.
15.Transformer Fuse (Optional) - Provides proper fusing for evaporative cooling transformer.
16.Cooling Relay (Optional) - Allows power to pass to cooling controls.
17.Reset Timer (Optional) - Resets cooling system to run a time interval.
18.Auto Drain Relay (Optional) - Assures supply pump does not operate during drain interval. Allows pump to operate in cooling mode.
19.Cooling Timer (Optional) - Allows for automatic draining of the evaporative cooling system based on time schedule.
20.Dirty Filter Switch (Optional) - Monitors filter pressure drop. Turns on indicating light when pressure drop is above field adjustable set point.
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Model IG / IGX