Patterson-Kelley MOD-04 Daily, Maintenance Weekly, Monthly During Operation, Semi-Annually

Modu-Fire®Gas-Fired Boiler

5.0 MAINTENANCE

General Lock out / Tag out procedure must be em- ployed when servicing unit.

Hazard analysis should be performed by end user to insure safety of their employees and/or service tech- nicians.

In addition to the requirements of Section 2.1, main- tenance performed on the Siemens gas valve re- quires that the valve be removed from the boiler and securely placed in a vice prior to performing any maintenance.

5.1MAINTENANCE AND INSPECTION SCHEDULE

WARNING!

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation.

Verify proper operation after servicing.

5.1.1 Daily

Observe operating temperature and general condi- tions. Make sure that the flow of combustion and ventilating air to the boiler is not obstructed. De- termine the cause of any illuminated red indicators, unusual noises or operating conditions and make the necessary corrections.

WARNING!

Check daily to be sure that the boiler area is free and clear of any combustible materials, including flammable vapors and liquids.

The motorized gas valves contain hydraulic oil which may be hazardous to the environment. Should a leak develop, use safe procedures for dis- posal of this or any other lubricant.

Maintenance

5.1.2 Weekly

Observe the conditions of the pilot and main flame. A normal High fire flame is blue. If the flame is yellow, then corrective action must be taken. In Low fire the burner will glow a yellowish orange.

Correct air adjustment is essential to the efficient operation of this boiler. If an adjustment in the combustion is necessary, the flue gas composition should be checked with a carbon dioxide (CO2) or oxygen (O2) analyzer to set conditions. Refer to Section 3.12.2 and 3.12.3.

5.1.3 Monthly (During Operation)

1.Test flame detection by voltage reading at the control programmer.

2.Test high-limit control by reducing setting be- low the operating temperature. Burner should shut off. After readjusting the thermostat, press the button to reset the switch.

3.Test operating temperature controls by reducing or increasing temperature setting as necessary to check burner operation.

4.Check flue gas temperature at outlet. If there is a temperature increase over previous readings, this probably indicates sooting or water scale build-up.

5.Test the water cutoff by trying to restart boiler with the system pump off. The boiler should not operate. Water flow indicator should light.

6.Test low gas pressure switch by closing main gas cock and attempting to restart boiler.

This work should be performed by factory-trained personnel.

5.1.4 Semi-Annually

In addition to the recommended monthly service:

1.Inspect and clean blower fan and inlet screen of any accumulated dust or lint.

2.Clean burner of any accumulated dust or lint. See Section 5.2 on "Cleaning the Burner."

24