Model IGX Make-Up Air
46
®
Reference
Typical Control Center Layout
Blower Control Center
1.
Supply Motor Starter/VFD
- 24 volt magnetic
contacts for starting supply motor.
2.
Supply Overload/VFD
- 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.
Microprocessor (Optional)
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.
Note
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
2
3
4
5
6 7
8
9
10
11
12
20
14 15
16
17
18
19
13
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.
