3
GAS SUPPLY AND PIPING.............................................................................................................................. 29
HIGH ALTITUDE DERATE .................................................................................................................................. 29
PROPANE GAS CONVERSION ........................................................................................................................... 29
GAS PIPING CONNECTIONS ............................................................................................................................. 30
PROPANE GAS TANKS AND PIPING................................................................................................................... 32
CIRCULATING AIR & FILTERS........................................................................................................................ 33
DUCT WORK - AIR FLOW ................................................................................................................................. 33
CHECKING DUCT STATIC.................................................................................................................................. 33
BOTTOM RETURN AIR O PENING [UPFLOW MODELS] ............................................................................................ 34
FILTERS - READ THIS SECTION BEFORE I NSTALLING THE RETURN AIR D UCT WORK................................................... 34
UPRIGHT INSTALLATIONS.................................................................................................................................. 35
HORIZONTAL INSTALLATIONS ............................................................................................................................. 35
STARTUP PROCEDURE & ADJUSTMENT ................................................................................................... 35
HEATING OPERATION WITH CTK01AA THERMOSTAT (COMMUNICATING).................................................................. 36
HEATING OPERATION WITH CTK02AA THERMOSTAT (MODULATING COMMUNICATING)................................................ 37
HEAT ANTICIPATOR SETTING ............................................................................................................................. 37
DRAIN TRAP PRIMING .................................................................................................................................... 37
FURNACE OPERATION ..................................................................................................................................... 37
GAS SUPPLY PRESSURE MEASUREMENT ........................................................................................................... 37
GAS MANIFOLD PRESSURE MEASUREMENT ....................................................................................................... 38
GAS INPUT RATE MEASUREMENT (NATURAL GAS ONLY) ...................................................................................... 39
TEMPERATURE RISE ...................................................................................................................................... 39
CIRCULATOR BLOWER SPEEDS ........................................................................................................................ 40
BLOWER HEAT OFF DELAY TIMINGS ................................................................................................................ 42
COMFORTNET™ SYSTEM ............................................................................................................................ 42
OVERVIEW ................................................................................................................................................... 42
AIRFLOW CONSIDERATION................................................................................................................................42
DIP SWITCHES................................................................................................................................................. 44
FOSSIL FUEL APPLICATIONS ............................................................................................................................ 45
CTK0*AA WIRING ....................................................................................................................................... 45
COMFORTNET™ SYSTEM ADVANCED FEATURES .................................................................................................. 45
FURNACE ADVANCED FEATURES MENU .............................................................................................................. 46
NETWORK TROUBLESHOOTING........................................................................................................................... 47
SYSTEM TROUBLESHOOTING ............................................................................................................................ 47
FAULT RECALL SEQUENCE .............................................................................................................................. 47
FAULT CLEAR SEQUENCE: .............................................................................................................................. 48
NORMAL SEQUENCE OF OPERATION......................................................................................................... 48
POWER UP.................................................................................................................................................. 48
HEATING MODE ............................................................................................................................................ 48
COOLING MODE ........................................................................................................................................... 49
FAN ONLY MODE.......................................................................................................................................... 49
OPERATIONAL CHECKS ................................................................................................................................ 49
SAFETY CIRCUIT DESCRIPTION .................................................................................................................. 49
INTEGRATED FURNACE CONTROL (IFC) ............................................................................................................. 49
PRIMARY LIMIT ............................................................................................................................................. 49
AUXILIARY LIMIT ............................................................................................................................................ 49
ROLLOUT LIMIT ............................................................................................................................................. 49
PRESSURE SWITCHES..................................................................................................................................... 50
FLAME SENSOR ............................................................................................................................................ 50