4.2 WARNING REGARDING CHILLED WATER AND HEATING COIL SYSTEMS.................................................. 174.3 INLET AND OUTLET CONNECTIONS........................................................................................................ 184.4 MINIMUM PIPE SIZE REQUIREMENTS .................................................................................................... 184.5 HEAT EXCHANGER ................................................................................................................................. 184.6 LOW WATER TEMPERATURE SYSTEMS .................................................................................................. 184.7 INSTANTANEOUS WATER HEATER ......................................................................................................... 184.8 WATER FLOW SWITCH .......................................................................................................................... 194.9 LOW WATER CUTOFF (If Equipped) ...................................................................................................... 194.10 RELIEF VALVE ........................................................................................................................................ 194.11 CIRCULATING PUMP SELECTION ............................................................................................................ 194.11.1 CIRCULATING PUMP OPERATION OF HEAT EXCHANGER ........................................................................ 194.12 ∆T HEAT EXCHANGER ALGORITHM........................................................................................................ 20PART 5 ELECTRICAL & CONTROLS ...................................................................................................................... 205.1 ELECTRICAL CONECTIONS...................................................................................................................... 205.2 VARIABLE FREQUENCY DRIVE (DR1200 – 5000) ..................................................................................... 215.3 DIFFRENTIAL AIR PRESSURE SWITCH ..................................................................................................... 215.4 BLOCKED FLUE SWITCH ......................................................................................................................... 215.5 DIFFERENTIAL GAS AND LOW GAS PRESSURE SWITCHES ....................................................................... 215.6 HIGH LIMIT ........................................................................................................................................... 215.7 DYNAFORCE® SOLA ............................................................................................................................... 225.7.1 SERVICE PARTS ...................................................................................................................................... 225.7.2 IGNITION MODULE LOCKOUT FUNCTIONS............................................................................................. 225.8 DYNAFORCE® CONTROLLER................................................................................................................... 225.9 ERROR TABLE ........................................................................................................................................ 22PART 6 CONTROL PANEL ................................................................................................................................... 246.1 APPLIANCE TEMPERATURE CONTROLLER .............................................................................................. 246.2 CONFIGURE MENU ................................................................................................................................ 406.3 LEAD LAG SETUP UP TO 8 BOILERS ........................................................................................................ 426.4 LEAD LAG SETUP FOR UP TO 12 APPLIANCES ......................................................................................... 436.5 LOCAL/REMOTE SWITCH ....................................................................................................................... 436.6 COMM. PORT 2 ACTIVATION ................................................................................................................. 436.6 VARIABLE FREQUENCY DRIVE (DR1200 - 5000) ...................................................................................... 446.7 FROST PROTECTION .............................................................................................................................. 44PART 7 COMPONENTS ...................................................................................................................................... 457.1 HOT SURFACE IGNITER (GLOW BAR)...................................................................................................... 457.2 FLAME SENSOR ..................................................................................................................................... 457.3 COMBUSTION AIR FAN .......................................................................................................................... 457.4 INNER JACKET ....................................................................................................................................... 457.5 OUTER JACKET ..................................................................................................................................... 457.6 VENTING TRANSITION .......................................................................................................................... 45PART 8 FIELD STARTUP PROCEDURE ................................................................................................................. 468.1 CHECKING THE INSTALLATION ............................................................................................................... 468.2 CHECKING THE CONSTRUCTION ............................................................................................................ 468.3 GAS VALVE ADJUSTMENT PROCEDURE.................................................................................................. 468.4 COMISSIONING APPLIANCE ................................................................................................................... 48PART 9 TROUBLESHOOTING .............................................................................................................................. 49PART 10 MAINTANANCE ..................................................................................................................................... 5610.1 EXAMINE THE VENTING SYSTEM ........................................................................................................... 5610.2 VISUALLY CHECK MAIN BURNER FLAMES .............................................................................................. 5610.3 FLUE GAS PASSAGEWAYS CLEANING PROCEDURES ............................................................................... 5610.4 CONDENSATION TREATMENT ............................................................................................................... 56