N
EO
T
HERM
Residential Boilers
®
SECTION 9
FIRST START-UP AND
ADJUSTMENT INSTRUCTIONS
9.A
Filling the Boiler System ................................. 54
9.B
First Operation ................................................ 55
9.C
Restarting the Unit .......................................... 55
9.D
Shutting Down the Unit ................................... 55
SECTION 10
MAINTENANCE
10.A
System Maintenance ...................................... 56
10.B
Maintenance and Component
Description ...................................................... 56
10.C
Gas Conversion .............................................. 58
SECTION 11
OPERATING DETAILS AND
TROUBLESHOOTING
11.A
Normal Startup and Initialization ..................... 60
11.B
Sequence of Operation .................................. 60
11.C
Modulation Control ......................................... 60
11.D
Pump Control .................................................. 60
11.E Anti-Short-Cycle ............................................. 60
11.F
Temperature Sensors ..................................... 61
11.G Diagnostics ..................................................... 61
11.H
Error Codes .................................................... 61
SECTION 12
REPLACEMENT PARTS
12.A
General Information ........................................ 62
12.B
Parts List .................................................. 62 - 68
APPENDICES
Appendix A - Software Control Functions .................... 69
Appendix B - Error Messages...................................... 74
ii
Summary of Contents for NEOTHERM NTH Series
Page 4: ...LAARS Heating Systems...
Page 24: ...Page 24 LAARS Heating Systems Figure 9 Hydronic Piping Single Boiler Zoning with Circulators...
Page 33: ...Page 33 NEOTHERM Residential Boilers Figure 16 Control Panel Layout...
Page 38: ...Page 38 LAARS Heating Systems Figure 19 Ladder Diagram 7 H Ladder Diagram...
Page 67: ...Page 67 NEOTHERM Residential Boilers Figure 44 Heat Exchanger Components 68A 65 67 60 66 63 64...
Page 68: ...Page 68 LAARS Heating Systems Figure 45 Electrical Components...
Page 82: ...LAARS Heating Systems Notes...
