Laars MASCOT FT MFTCW Installation And Operation Instructions Manual

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Laars MASCOT FT MFTCW Installation And Operation Instructions Manual Manual pdf 65 page image

Mascot FT Combination BoilerPage 63Question AnswerBurner dose not ignitewhen the hot water isopened.Make sure that the ON/OFF button on the Control Panel has been turned ON.If the monitor on the Control Panel is blank, make sure the power cord isplugged and 4A fuses on the main controller in the units are good.Make sure that there is water supplied to the unit. The unit activates oncethe inlet water flow is over 0 gpm.Make sure the cold and hot water lines are not plumbed in reverse side.Make sure that the cold water and gas supply lines are opened.Make sure that the water lines are not frozen.Water is not hot enough.Check that the setting temperature on the unit is not too lowMake sure that the filter in the cold water supply line is not clogged withdebris.Make sure that the gas supply type is correct.Check the supply and manifold gas pressures are in accordance withspecifications.Make sure that the water flow sensor with three wires has been properlyconnected on the top of heat exchanger.Water is too hot.Make sure that the setting temperature on the unit is not too hot.Make sure that the filter in the cold water supply line is not clogged withdebris.Make sure that the gas supply type is correct.Hot water temperaturefluctuates at the openedtap.Make sure that the filter in the cold water supply line is clean.Make sure that the gas supply type is correct.Check the supply gas pressure is sufficient.The blower is stilloperating after thecombustion stops.This is normal because the blower keeps operating for 1 minute to vent(exhaust) the flue gas from the chamber once the combustion hasstopped.Temperature Risetoo QuicklyOccurs when supply water temperature in heat exchanger rises fasterthan 2°F per second during the first two minutes the burner is on.Automatically resets after a few minute delay or using manual reset oncontrol panel. See message displayed TEMPERATURE SENSOR andfollow procedure for loose connections.Abnormal sounds comefrom unit during opera-tion.A leak of combustion gas between sealed chamber and exhaust tubeinside the unit. Call a qualified service technician for evaluation.Improper venting termination, make sure that the venting terminationcomplies with specification.Check the supply gas pressure is sufficient. Insufficient gas pressure willcause unstable burner flame and noise.SECTION 7. Trouble Shooting 7.1 Diagnostics