Nu-Way RGN 40 Installation & Maintenance Manual

Contents

Nu-Way RGN 40 Installation & Maintenance Manual Manual pdf 8 page image

8E.04.99 • G. 13.11.02FunctionCarry out the following checks after commissioning and each time after the burner has been serviced:Jumper gas pressure monitor: to do so, detach grey cube connector on KE 15 and remove cover. Closeball valve during operation with jumpered gas pressure monitor: device must go into fault mode immediate-ly after flame failure.Start-up with closed ball valve and jumpered gas pressure monitor: device must go into fault mode aftersafety time has elapsed.After completion of check, reverse connection and re-establish original status.Check air pressure monitor contact: device goes into fault mode when silicone connecting hose isdetached. Re-attach hose to connecting point "+".Bypass air pressure monitor before start-up: To so so connect terminals 5 and 7(on MMI 810) or terminals4 and 7 (on DMG 970) in the lower part of the control box (see circuit diagrams page 17-18), burner mustnot go into operation ! After completion of check,disconnect terminals and re-establish original status.Safety and switching functionsA restart takes place in all cases following a mains power failure. An existing fault shutdown is retained.In the event of a flame failure during operation, the fuel supply is immediately switched off and the controlbox goes into fault mode within 1 sec.If a flame signal is effected during pre-aeration, a fault shutdown is effected immediately.The position of the air pressure monitor is continuously checked. There can be no start-up if it is not in itsneutral position. If the working contact is not made during pre-aeration or re-opens, a fault shutdown is ef-fected.In the event of a lack of air during operation, the air pressure monitor contact opens and the valves closeimmediately. The device goes into fault mode within 1 sec.Air flow setting, measurement "A"1. Distance "A"2. Locknut for air-restrictor settingTurn screw (3) clockwise: Air -Turn screw (3) anticlockwise: Air +213