Table of contents (continued) – LAARS NeoTherm NTV (Sizes 399-850 MBTU/h) - Service Manual User Manual
Page 8
Service Manual - NeoTherm 500
Table of Contents (continued)
Removing and Replacing the High and Low Gas
Pressure Switches ............................................................. 32
Checking the Condensate Trap Water Level Switch ......... 35
Testing the Condensate Trap Level Switch ....................... 36
Removing and Replacing the Condensate Trap ................ 36
Checking the Air Pressure Switch -
Blower Proving Switch ....................................................... 38
Test Procedure for Air Pressure Switch ............................. 39
Removing and Replacing the Air Pressure Switch ............ 39
Checking the Blower .......................................................... 41
Removing and Replacing the Blower ................................ 42
High Stack Temperature Fault ........................................... 46
Stack Temperature Limit Switch ........................................ 47
Checking the System Sensor ............................................ 48
Checking the DHW Sensor ................................................ 48
Inlet Water Temperature Sensor ........................................ 49
Inlet Water Temperature Sensor ........................................ 49
Outlet Water Temperature Sensor ..................................... 50
Outlet Water Temperature Sensor .................................... 50
Testing the Temperature Sensors ...................................... 51
Troubleshooting the Outdoor Reset System ..................... 52
Servicing the Transformer ................................................. 52
Removing and Replacing the Pressure Relief Valve ......... 54
Ignitor Assembly ................................................................ 55
Flame Sensor .................................................................... 56
Pump Fault ........................................................................ 57
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