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

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 blower operation until no fog appears on the mirror

After drying the coil, wait a few minutes then repeat blower operation

Lock-out the gas and electrical power to the unit

Check V-belt drive for wear, tension, alignment, and dirt accumulation

Measure the deflection in the belt

Check alignment using a straight edge across both sheaves

Ensure no prying of belts on or off the sheave

Loosen belt tension to remove belts by lifting off the sheaves

Replace all V-belts on multiple groove drives to ensure uniform drive loading

Inspect sheaves for grooves and replace if worn before installing new belts

Lock-out the gas supply to the unit

Lock-out the electrical power to the unit

Filter Cleaning and Replacement

Identify the type of filters installed

Reinstall filters with correct airflow direction

Ensure replacement filters are from the same manufacturer and size as original

Wash filters in warm soapy water

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

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

Gather necessary cleaning materials (cloth, brush, etc.)

Clean the exterior surfaces of the motor to remove dust and grease build-up

Ensure no water or solvents have entered the motor or bearings

Verify that the motor housing is free of dust and grease

Confirm that the motor bearings have not been sprayed with water, steam, or solvents