Camus Hydronics DFH/W500 Installation, Operation And Service Manual

Contents

Camus Hydronics DFH/W500 Installation, Operation And Service Manual Manual pdf 58 page image

53PART 9 TROUBLE SHOOTINGCOMPONENT FAILURE MODE ANALYSISIncoming Power • Two wires interchanged • No effect on safety• Live and Neutral wires are interchanged.TransformerTripped• The 24Volts and 120 Volts wiredare interchanged• Alert: 49• Lockout: 53• Breaker on transformer tripsRelief Valve• System pressure exceeds reliefvalve setting• Replace the standard relief valve with a higher rated valveup to the maximum pressure of the heat exchanger.• Improperly sized expansion tank.Flow Switch• Flow Switch contacts are open• Alert: 63, 275-281, 460• LCI OFF• Verify that pump is operating• Verify for closed valves or obstructions in boiler piping• Verify that all air has been purged from the system• Verify that wiring is correctFlame Failure• The boiler has failed to ignite theburner• Alert: 110, 291-294• To reset the module refer to section 5.8.2• Verify that all air has been purged from gas line• Inspect hot surface igniter and related wiring for damageand connection errors• DF 500 – 2500: Verify igniter is glowing• DF 3000 – 6000: Verify pilot is lit• Inspect flame sensor and associated wiring. Replace ifnecessary• Verify that boiler is properly grounded• Verify incoming gas supply pressure and that it coincideswith Table 7.• Verify that the vent/ air inlet piping (if equipped) arecorrectly installed and obstructions are not present.• Verify 24 VAC (DF 500 – 1200) and 115VAC (DF 1400 –6000) is being supplied to the gas valve relay from theDynaFlame Controller during ignition. Check wiring fromDynaFlame Controller and Gas Valve Relay. If a signalcannot be detected, the DynaFlame Controller needs to bereplaced• If 24 VAC is present, check the outlet of the valve to ensurethat gas is flowing. When the valve is energized a changein pressure should occur, if no change is detected the gasvalve has failed to open or it is passing insufficient amountof gas. If this is an initial startup increase the low fire gassetting by ¼ turn clockwise.• Inspect the burner. Refer to Burner Maintenance in section10.5• Replace the DynaFlame Controller, if necessary