Table of Contents
Introduction .............................................................................................................................
Important Notice ..........................................................................................................................................................................
Code Requirements .....................................................................................................................................................................
Safety Rules ................................................................................................................................................................................
Installation Tips ........................................................................................................................
Dimensions ...............................................................................................................................
Gas Requirements ...................................................................................................................
Gas Line Installations ..................................................................................................................................................................
Sediment Traps ...........................................................................................................................................................................
Testing Gas Pressure ..............................................................................................................
Gas Pressure Requirements .......................................................................................................................................................
Water Connections................................................................................................................... 10-11
Plumbing Connections .................................................................................................................................................................
Manual By-Pass ..........................................................................................................................................................................
Valves ..........................................................................................................................................................................................
Below Pool Installation ................................................................................................................................................................
Pressure Switch Adjustment ........................................................................................................................................................
Reversing Headers ................................................................................................................... 12-13
Air Requirements ..................................................................................................................... 14-17
Venting - Indoor Installations ..................................................................................................................................................... 14 - 16
Venting - Outdoor Installations ..................................................................................................................................................
Electrical Wiring ....................................................................................................................... 18-21
Wiring Diagram ............................................................................................................................................................................
Basic System Operation .......................................................................................................... 22-24
Chemical Balance ........................................................................................................................................................................
Maintenance ............................................................................................................................. 25-28
Pressure Relief Valve ..................................................................................................................................................................
Burner Tray Removal ...................................................................................................................................................................
Desooting ....................................................................................................................................................................................
Reinstalling Heat Exchanger .......................................................................................................................................................
Troubleshooting ....................................................................................................................... 29-46
Glossary ....................................................................................................................................
Warranty Information ...............................................................................................................
P/N NTSM03
2
3
3
3
4
4
5
6
6
7-8
7
7
8
8
8
9
9
10
10
11
11
11
17
19
20
21
22
23
24
25
25
26
27
28
47
48-49
50-51
Back Cover
Rev. B 2-11-04