9
10.1.5 - Connection to the MODBUS interface.................................................................................................................... 54
10.2 - Connecting the IB boiler to an indirect water heater ........................................................................................ 55
10.2.1 Indirect water heater priority selection ...................................................................................................................... 55
10.3 - Connecting the IW water heater to a storage tank ........................................................................................... 55
10.4 - Connecting the heater in cascade .................................................................................................................... 59
11 - INSTALLATION - Vent and combustion air ............................................................................60
11.1 - Removing of a heater from a common venting system .................................................................................... 60
11.2 - Prevent combustion air contamination ............................................................................................................. 61
11.3 - Venting and air piping systems ......................................................................................................................... 61
11.4 - Minimum / Maximum allowable combustion air and vent piping lengths .......................................................... 63
11.5 - Install vent and combustion air piping .............................................................................................................. 63
11.6 - Air inlet pipe materials: ..................................................................................................................................... 65
11.6.1 - Sealing of PVC, CPVC or ABS air inlet pipe ........................................................................................................... 65
11.7 - PVC/CPVC vent piping materials ..................................................................................................................... 66
11.7.1 - Installing PVC/CPVC vent and air piping ................................................................................................................ 66
11.7.2 - PVC/CPVC air intake connection ........................................................................................................................... 67
11.7.3 - PVC/CPVC vent connection ................................................................................................................................... 67
11.8 - Stainless steel vent piping materials ................................................................................................................ 68
11.8.1 - Stainless steel air intake connection ...................................................................................................................... 69
11.8.2 - Stainless steel vent connection .............................................................................................................................. 69
11.9 - Polypropylene vent piping materials ................................................................................................................. 70
11.9.1 - Polypropylene air intake connection ....................................................................................................................... 71
11.9.2 - Polypropylene vent connection ............................................................................................................................... 71
11.10 - Single pipe vent (not sealed combustion) ...................................................................................................... 72
11.10.1 - Combustion Air and Ventilation openings ............................................................................................................. 72
11.10.2 - Determine location ................................................................................................................................................ 73
11.11 - Sidewall termination - Two pipes .................................................................................................................... 74
11.11.1 - Vent/air termination ............................................................................................................................................... 74
11.11.2 - Determine location ................................................................................................................................................ 74
11.11.3 - Prepare wall penetrations ..................................................................................................................................... 76
11.11.4 - Termination and fi ttings ......................................................................................................................................... 76
11.11.5 - Multiple vent/air terminations ................................................................................................................................ 76
11.12 - Sidewall termination – Concentric vent .......................................................................................................... 77
11.12.1 - Description and usage .......................................................................................................................................... 77
11.12.2 - Sidewall termination installation ........................................................................................................................... 77
11.12.3 - Multiventing sidewall terminations ........................................................................................................................ 78
11.13 - Vertical termination - Two pipes ...................................................................................................................... 79
11.13.1 - Determine location ................................................................................................................................................ 79
11.13.2 - Prepare roof penetrations ..................................................................................................................................... 79
11.13.3 - Termination and fi ttings ......................................................................................................................................... 79
11.13.4 - Multiple vent/air terminations ................................................................................................................................ 80
11.14 - Vertical termination – Concentric vent ............................................................................................................ 81
11.14.1 - Description and usage .......................................................................................................................................... 81
11.14.2 - Determine location ................................................................................................................................................ 81
11.14.3 - Vertical termination installation ............................................................................................................................. 81
11.14.4 - Multiventing vertical terminations ......................................................................................................................... 82
12 - INSTALLATION - Gas supply .................................................................................................83
12.1 - Gas supply piping ............................................................................................................................................. 83
12.2 - Pipe sizing for natural gas ................................................................................................................................ 84
12.3 - Propane Gas .................................................................................................................................................... 84
12.4 - Check inlet gas supply pressure ...................................................................................................................... 85
12.5 - Operating at high altitudes ............................................................................................................................... 85
12.6 - Convert a heater model 199 from Natural Gas to Propane gas or viceversa .................................................. 86
12.7 - Convert a heater model 399, 500, 750 or 1000 from Natural Gas to Propane gas or viceversa ..................... 88
13 - START-UP .................................................................................................................................90
13.1 - Operating ......................................................................................................................................................... 90
13.1.1 - User instructions..................................................................................................................................................... 90
13.1.2 - Filling the condensate and neutralizing box ........................................................................................................... 90
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