Greenheck Make-Up Air Unit IGX-P120-H22-MF-I

Lock-out the gas supply to the unit

Lock-out the electrical power to the unit

Clean exterior surfaces of the motor

Ensure no water or solvents enter the motor or bearings

Check if the motor has grease fittings

Grease the motor according to manufacturer's recommendations

Close valves on the supply and return lines

Open drain valves and/or drain plug. Remove vent plug to allow coil to drain faster

Connect a blower to the caps. Do not connect the blower to the air vent or drain plug

Close the vent plug on the header that the blower is connected to. Open the drain valve or cap on the other header

Did the mirror fog up when placed at discharge?

Repeat procedure until no fog appears on the mirror

After drying the coil, wait a few minutes then repeat Step #5

Lock-out the gas supply to the unit

Lock-out the electrical power to the unit

Inspect the coil for signs of corrosion and/or leaks

Inspect the coil's surface for foreign material

Clean the coil from the leaving air-side if necessary

Lock-out the gas supply to the unit

Lock-out the electrical power to the unit

Brush the media lightly with a soft bristle brush while flushing with water

Is there a large amount of mineral build-up?

Action for large mineral build-up

Is the cooling media due for replacement?

Disconnect and lock-out all power and gas before performing any maintenance or service to the unit.

Ensure all tools are available: Voltage Meter, Amperage Meter, Pressure Gauges, Tachometer, Thermometer, U-tube manometer or equivalent.

Check the housing, fan, and ductwork for any foreign objects before running the fan.

Electrical and Mechanical Checks

Tug test all internal electrical connections to ensure no loose connections occurred during shipment.

Is the supply fan wheel free to rotate without striking or rubbing any stationary objects?