Horizon™ Dedicated Outdoor Air Systems OAU-SVX005D-EN: Direct-Fired Unit Maintenance Schedule (Monthly))

Monthly:

• Check all valves, piping and connections for leaks.

• Check the flame setting.

• Check the fuel pressure in the fuel supply line to each heater.

• Check the burner manifold pressure at full fire.

• Clean the flame sensor(s) or UV sight tube(s).

• Inspect filters. Clean or replace as necessary.

• Inspect the main fan bearings

• Check all dampers, damper actuators and linkages. Adjust and tighten if necessary.

• Ensure that there are no obstruction blocking the air supply to the heater or the air discharge from the heater.

• Inspect the area and make sure that no combustible or hazardous material has been stored within the clearances as shown on the unit nameplate.