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STANDARD COMBUSTION CONTROL <br />MNDARID (AGA) AI'MIIN NNCON"T`I�ROL <br />UNIVERSAL CONTROL SYSTEM FEATURES: <br />One Weil -McClain' UCS ignition control module and wire harness are furnished as <br />standard equipment with each base assembly. <br />On a call for heat, the UCS produces a spark to ignite the pilot. When the pilot flame is <br />proven, the main gas valve opens with a built-in, slow opening soft ignition. <br />In the event the pilot is not proven during a timed trial for ignition, the UCS control <br />system will provide 100% shutoff. After a timed 5-minute delay, another ignition sequence <br />will automatically be initiated. <br />The control system has been certified by AGA and all <br />components are UL Listed. <br />The gas train allows for fast and easy installation. A slow - <br />opening, soft ignition, high capacity, combination gas <br />valve is used on the LGBT' 4-5 boilers. <br />T � NIA" ." NII IIII IIII����� � <br />II <br />S � NN <br />� � N°u ° n ' NII"" . N <br />NI'n TIM <br />6[,' i=m o oNI r�zc)i , <br />S "S I , Illf , IIII IIS <br />WFG FLAME GUARDIAN' CONTROL SYSTEM FEATURES: <br />A pre -wired WFG°' control system consisting of a mounting plate, two Weil -McLain`°' UCS <br />control modules and terminal block are furnished as standard equipment with each base <br />assembly. <br />On a call for heat, the pilot proving control module provides a spark to ignite the pilot. <br />When the pilot flame is proven, the first stage of the two -stage gas valve opens and all <br />burners light on low fire. When the main flame sensor proves carryover, the second stage <br />of the gas valve opens and the burners go to high fire. <br />In the event the pilot or main flame is not proven during a timed trial for ignition, the <br />WFG" control system will provide 100% shutoff. After a timed 5-minute delay, another <br />ignition sequence will automatically be initiated. The control system provides multiple <br />ignition trials. <br />The control system design has been certified by AGA and all components are UL Listed. <br />LOW -HIGH -LOW FIRING: <br />LGB 6-23 boilers can provide low -high -low firing with the <br />addition of a water temperature or steam pressure control. <br />FACTORY-ASSEM BLED GAS TRAIN: <br />The gas train allows for fast and easy installation, <br />A dual gas valve train has an on/off diaphram <br />valve and a low -high -low regulated gas valve. 5 <br />