Weil-McLain CGi Automatic air vents if used Main burner flame, Pilot burner flame, Check monthly

— CGs boilers only

UserísInformationManual

❏Check monthly . . . . . . . . . . . . . . . .

Automatic air vents (if used) Main burner flame

1. See Figure 4. Proper main burner flame (see Figure 6):

2.Remove the cap from any automatic air vent in the system and check operation by depressing valve B slightly with the tip of a screwdriver.

3.If the air vent valve appears to be working freely and not leaking, replace cap A, twisting all the way on.

4.Loosen cap A one turn to allow vent to operate.

5.Have vent replaced if it does not operate correctly.

Figure 4 Automatic air vent

A

B

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1. Yellow-orange streaks may appear (caused by dust).

Improper main burner flame:

1.Overfired — Large flames.

2.Underfired — Small flames.

3.Lack of primary air — Yellow tipping on flames (sooting will occur).

Figure 6 Main burner flame, typical

Pilot burner flame

Proper pilot flame (see Figure 5):

1.Blue flame.

2.Inner cone engulfing thermocouple or thermopile (standing pilot) or pilot flame sensor (spark-ignited pilot).

3.Thermocouple or thermopile, or pilot flame sensor glowing cherry red.

Improper pilot flame:

1.Overfired — Large flame lifting or blowing past pilot flame sensor.

2.Underfired — Small flame. Inner cone not engulfing pilot flame sensor.

3.Lack of primary air — Yellow flame tip.

4.Incorrectly heated pilot flame sensor.

Figure 5 Pilot burner and flame, typical

Inner

Sparkcone electrode

Pilot flame sensor (spark- ignited pilots)

— or —

Thermocouple or thermopile (standing pilots)

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Transparent blue flame

Inner flame

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Clean vent termination & air intake screens

1.Remove all lint and debris from both the boiler air intake screen and the flue discharge screen.

The boiler control module will sense blockage of the air intake or flue and lockout if the blockage is excessive. It will signal the failure by flashing the appropriate indicator lights on the control board.

2.If removing the debris does not allow the boiler to operate correctly afterwards, contact your qualified service technician to inspect the boiler and vent/ air systems.

Check condensate drain system

1.Inspect condensate drain fittings and tubing. Verify that condensate can flow freely to drain.

Part Number 550-110-592/1000 9