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

Inspect the heat exchanger for cracks

Inspect the tubes for discoloration

Check airflow across the heat exchanger

Lock-out the gas supply to the unit

Lock-out the electrical power to the unit

Check for oil accumulation on the wheel

Check for dust accumulation on the wheel

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

Place mirror at discharge. Did the mirror fog up?

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

Ensure the motor is powered off and disconnected from the power source

Inspect the motor for any visible dust and grease build-up on the exterior surfaces

Remove dust from the motor housing using a dry cloth or brush

Wipe off grease build-up on the motor housing with a dry cloth

Ensure no water or solvents have entered the motor or bearings during cleaning

Verify that the motor bearings are intact and show no signs of damage