Lochinvar 50-210 service manual

Contents

Main Service Manual Models: 50 - 210 Hazard definitions Contents DANGER WARNING CAUTION CAUTION NOTICE Please read before proceeding Handling ceramic fiber materials REMOVAL OF COMBUSTION CHAMBER LINING NIOSH stated First Aid. Please read before proceeding When servicing boiler Boiler operation Boiler water Freeze protection fluids What is in this manual? Service Near boiler piping The Knight wall mount boiler display Control module inputs Page Page LOW VOLTAGE CONNECTION BOARD SMART CONTROL MODULE Control inputs Page General Operation How the boiler operates How the control module operates Sequence of operation Saving parameters Sequence of operation Sequence of operation Page Page Parameter table Table 1D This table lists SMART SYSTEM control module parameters and where to access them OUTDOOR AIR RESET TEMPERATURE F Parameter table Viewable and changeable control parameters A: General B: Temperature settings NOTICE C: Data logging D: Functions E: DHW settings F: Outdoor air reset Page G: Anti-cycling H: Control modes Cascade offset I: Circulation pumps J: Service Notification Maintenance and annual startup Service technician Owner maintenance Address reported problems Inspect boiler area Check all piping for leaks Inspect boiler interior Clean condensate trap 2 Flue vent system and air piping Check water system Check expansion tank Check boiler relief valve Inspect ignition and flame sense electrodes Check ignition ground wiring Check all boiler wiring Check control settings Perform start-up and checks 2 Check flame signal Review with owner Cleaning boiler heat exchanger Oiled bearing circulators Before troubleshooting: Check the following: Check control module fuses Table 3A Troubleshooting Chart - No Display FAULT CAUSE CORRECTIVE ACTION No Display No Burner Operation Unit Does Not Modulate Above 50% Checking temperature sensors FAULT CAUSE CORRECTIVE ACTION Table 3F Troubleshooting Chart - Fault Messages Displayed on Boiler Interface Flow Switch/LWCO Blocked Drain SW Flame Sequence GV/Relay Fail Anti-cycling No Flame Ign No Flame Running Auto Reset High Limit Fan Low OR Fan Speed Low Fan High OR Fan Speed High Sensor Open Sensor Shorted Aux. Proving Temp O/Shoot Temp O/Shoot (continued) Rem Ctrl Flt Parameters Progr APS Open Service Blk No Error Stored CRC Parameters Low 24 vac Watch Dog Error Combustion Analysis Procedure POSSIBLE CAUSE CORRECTIVE ACTION Gas valve adjustment procedure