LAARS NeoTherm NTV (Sizes 150–285 MBTU/h) - Service Manual - Manual (Page 8)

Service Manual NeoTherm 80 - NeoTherm 285
Table of Contents (continued)
B15 Checking the Air Pressure Switch -
Blower Proving Switch ....................................................... 33
B16 Test Procedure for Air Pressure Switch ............................. 34
B17 Removing and Replacing the Air Pressure Switch ............ 34
B18 Checking the Blower .......................................................... 36
B19 Removing and Replacing the Blower ................................ 37
B20 High Stack Temperature Fault ........................................... 40
B21 Removing and Replacing the
Stack Temperature Limit Switch ........................................ 41
B22 Checking the System Sensor ............................................ 42
B23 Checking the DHW Sensor ................................................ 42
B24 Inlet Water Temperature Sensor ........................................ 43
B25 Removing and Replacing the
Inlet Water Temperature Sensor ........................................ 43
B26 Outlet Water Temperature Sensor ..................................... 44
B27 Removing and Replacing the
Outlet Water Temperature Sensor .................................... 44
B28 Testing the Temperature Sensors ...................................... 45
B29 Troubleshooting the Outdoor Reset System ..................... 46
B30 Servicing the Transformer ................................................. 46
B31 Removing and Replacing the Pressure Relief Valve ......... 48
B32 Ignitor Assembly ................................................................ 49
B33 Flame Sensor .................................................................... 50
B34 Pump Fault ........................................................................ 51
Section C - Possible Combustion Problems
Sect. Title
Page
C1 About Correct Combustion ................................................ 53
C2 Combustion Adjustment Procedure -
Units with Original (White) User Interface ......................... 54
C3 Combustion Adjustment Procedure -
Units with Current User Interface ...................................... 56
C4 Troubleshooting Combustion Problems ............................ 58
C5 Cleaning the Burner and Heat Exchanger ......................... 59
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