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

Quarterly Maintenance:

• Complete the monthly maintenance schedule

• Check the belt tension for the main fan(s) and adjust if necessary.

• Check the alignment of the sheaves and adjust if necessary.

• Inspect all bearings, set-screws for tightness and lubricate bearings if necessary.

• Check the pilot electrical system. Adjust if necessary.

• Check the pilot assembly. Clean and adjust if necessary.

• Inspect the burner carefully. clean and adjust if necessary.

• Check voltages and amp draw on main fan motor.

• Check the operation of all safety controls individually.

• Check the operation of the automatic gas shut-off valves and check them for leakage at the pressure test ports provided.

• On vertical units, inspect burner drip leg and drain if necessary.