Crown Gas-Fired Hot Water Boiler ABF-70EID

Warning: This procedure requires trained personnel with PPE!

System pressure exceeds the pressure rating of the relief valve?

If the system pressure exceeds the pressure rating of the relief valve, shut down your system.

System pressure reduced below the relief valve pressure rating?

If valve discharge occurs, or if valve fails to open as described above, contact an authorized contractor or qualified service technician.

Discharge pipe properly connected to valve outlet and arranged to safely dispose of boiler discharge?

Valve tested at normal system operating pressure?

Held the trip lever fully open for at least five seconds to flush free any sediment?

Under normal operating conditions, with the burners properly adjusted, it should not be necessary to clean the boiler flue gas passages.

However, to assure trouble-free operation, we recommend that you have the flue passages, burner adjustment, and operation of the controls checked once each year by a competent Service Technician.

Operation of the controls checked?

Before the start of each season (or whenever system has been shut down for some time recheck the whole system for leaks ... and recheck the boiler and vent pipe for leaks.

Whole system checked for leaks?

Boiler and vent pipe checked for leaks?

Replace or patch any boiler seals that are faulty.

Frequent automatic opening of the relief valve?

High boiler temperature accompanied by unusually low radiation unit temperature?

To correct either condition, follow the steps below

Close the valve between the boiler and the tank

Drain the tank until it is empty

Check all the tank plugs and fittings

Open the valve between the boiler and tank

Flue passages between sections should be examined yearly and cleaned if necessary.

Remove burners, pilot, and vent pipe.

Remove top and front jacket panels.

Remove the two screws attaching the intermediate front panel to the left and right side jacket panels.

Remove the draft diverter and intermediate front panel as a unit.

Carefully remove the cerafelt gasket strips.

Clean passageways between sections with a flexible handle wire brush.

Remove dirt from bottom of boiler and from between sections by vacuuming.

Make sure all flame ports in burners are open and clear.

- A visual check of the pilot and main burner flames should be made at least once each year, preferably at the beginning of the heating season. Checking and Adjusting:

Pilot flame should surround 3/8" to 1/2" of the pilot sensor.

Refer to Fig. 18. If flame needs adjusting, do it as follows:

1. Remove screw cover over pilot adjusting screw.

2. Insert small screwdriver and adjust flame as needed. Turn screw counterclockwise to increase flame, clockwise to decrease.

3. Replace screw cover over pilot adjusting screw.

The primary air shutters on the cast iron main burners should be adjusted so the flame forms a sharp blue cone with no yellow. It may be necessary to remove the rollout shield to observe main burner flames. Replace after adjustment of air shutters.