Nu-Way MGN 2800N Installation & Maintenance Manual

Nu-Way MGN 2800N Installation & Maintenance Manual Manual pdf 24 page image

MGN 2800N HP 23FAULT FINDINGAny modifications to the installation or component settings resulting from actions suggested belowmay require the re-establishment of the various settings as indicated earlier in this manual.Burner Motor Fails To StartCheck:• that the electrical supply is available and the burner is correctly wired.• all fuses for continuity and size.• all control instruments are “calling for heat”.• the gas train is electrically connected.• the control box is not locked out (e.g. signal lamp faulty). (If the control box is locked out, press thereset button).• there is sufficient gas pressure.• the air pressure switch is in the “start” position, as follows: -Switch off the electrical supply. Remove the plug-in assembly from the control box base. Check forcontinuity between the following terminals:Satronic TMG 740 - Terminals 17 & 16Landis & Staefa LFL 1.3 - Terminals 4 & 13If the air pressure switch is not in the start position, turn the setting dial clockwise. If no continuity isobtained, the air pressure switch is faulty and must be renewed.Starting Flame Failure Without IgnitionCheck:• The glass envelope of the UV cell is clean and correctly positioned.• The UV cell and its wiring.• The air pressure switch is set correctly.• The electrode is correctly set and the porcelain is not cracked.• The ignition transformer is not faulty.• The control box is not faulty.Starting Flame Failure Without FlameIf the start rate flame is not properly established, the safety circuit of the sequence controller willcause lockout in one second.The cause may be insufficient signal to the flame detection device. Alternatively the flame signalcheck link has been removed, or insufficient gas to allow the flame monitoring device to take over andsignal the sequence controller to continue its cycle.