Greenheck Warehouse Make Up Air Unit DGX-125-H35-DB

Check the gas connections, joints and valves annually for tightness

Apply a soap and water solution to all piping

Watch for bubbling which indicates a leak;

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

Leave drains open and do not install plugs until beginning of cooling season;

Inspect the burner for accumulation of scale on both the upstream and downstream sides of the mixing plates

Remove foreign material with a wire brush

Visually check that all holes in the mixing plates are clear

If any burner ports are plugged (even partially), clear them with a piece of wire or another appropriate tool. Do not enlarge burner ports when clearing a blockage as performance could be affected

Replace or tighten any loose or missing fasteners on the mixing plates

Always use appropriate fasteners

Inspect and clean the flame rod or UV scanner

Occasional replacement of the flame rod and spark rod may be necessary to ensure optimum unit performance;

Test the circulating fluid for sediment, corrosive products and biological contaminants. Take the necessary corrective measures

Maintain adequate fluid velocities and proper filtering of the fluid

If automatic air vents are not utilized, periodic venting of the coil is recommended to remove accumulated air;

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;