Greenheck Warehouse Make Up Air Unit DGX-108

Warning: This procedure should be performed by trained personnel only.

Close valves on the supply and return lines

Open drain valves and/or drain plug

Remove vent plug to allow coil to drain faster

After coil is fully drained, 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. If the mirror fogs up, repeat procedure until no fog appears on the mirror

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

Warning: This procedure should be performed by trained personnel only

Gas connections checked for tightness

Upload a photo of the soap and water solution application

Describe the location of any leaks detected

Sign off on the gas train check

Repair and replacement of the coil and the connecting piping, valves, etc., must be performed by a qualified individual

Inspect the coil for signs of corrosion and/or leaks

Inspect the coil’s surface for foreign material. If the coil surface needs cleaning, clean the coil from the leaving air-side so that foreign material will be washed out of the coil rather than pushed farther in

Inspect and clean the drain pan to prevent the growth of algae and other organisms

Be sure to read and follow the coil manufacturer’s recommendations before using any cleaning fluid

Caution must be used to avoid injury when venting the coil

High pressure and/or high temperature fluids can cause serious injuries

Sign off on the cooling coil maintenance

Note: Fan bearings are carefully selected to match the maximum load and operating conditions of the specific class, arrangement and fan size.

The instructions provided in this manual and those provided by the bearing manufacturer will minimize any bearing problems.

Are the bearings lubricated prior to periods of extended shutdowns or storage?

Is the shaft rotated monthly to aid in corrosion prevention?

If the fan is stored more than three months, purge the bearings with new grease prior to start-up.

Are the bearings purged with new grease if the fan is stored more than three months?

Sign off on the fan bearing lubrication

Warning: This maintenance check requires trained personnel with PPE!

Check for wear, tension, alignment, and dirt accumulation

Measure the deflection in the belt

Check the alignment using a straight edge across both sheaves

Account for differences in sheave width

Check for premature or frequent belt failures

Check for abnormally high belt tension or drive misalignment

Check for abnormally low belt tension

Ensure belts are not pried on or off the sheave