Weil-McLain ECO 70 Manual page 97

TM -
G
AS FIRED WATER BOILER
Troubleshooting
Troubleshooting suggestions for
Condition
Display
IGNITION Boiler went through 5
FAULT ignition attempts and never
detected flame.
Part number 550-142-122/0513
— Boiler Manual
(continued)
boilers —
Diagnostics
Automatically resets after 1 hour
or can be reset by performing
manual reset on boiler.
Corrective Action(s)
Check condensate trap for blockage allowing condensate to accumulate
inside heat exchanger.
Check ignition cable connection.
Fouled, worn, bent, or faulty igniter.
Fouled igniters can be cleaned for additional use with steel wool.
Worn or badly fouled igniters should be replaced with the proper repair
part.
Thin white deposits on the igniter are typical, but brown or
black deposits could be the result of flue gas recirculation. Thoroughly
inspect the venting system and termination for the possibility of leakage
or flue gas feedback into the air line.
Dirty burner and/or heat exchanger will cause high back pressure and
poor ignition.
Follow procedure in maintenance section of this manual to clean burner
and heat exchanger. Visual inspection of flueways may not be sufficient
to diagnose condition.
Check combustion settings on high and low fire and adjust per setup
instructions if necessary.
Check incoming gas pressure with boiler off and at high fire. Adjust
within limits on rating label.
Verify correct boiler model is selected in control and high altitude is
selected for installations 5,500 feet above sea level.
Check ignition cable resistance. Should measure 1000 Ohms (+/- 50
Ohms).
Check for flue pipe and intake pipe restrictions or blockage.
Check burner fasteners and gaskets.
Check venturi gaskets and proper propane orifice bushing.
97