Installation Guide

2
ELECTRICAL CONNECTIONS .................................21
WIRING HARNESS ...........................................21
115 VOLT LINE CONNECTIONS ...............................21
JUNCTION BOX RELOCATION ..................................22
24 VOLT THERMOSTAT WIRING ...............................22
SINGLE-STAGE HEATING THERMOSTAT A PPLICATION ..............23
24 VOLT DEHUMIDISTAT WIRING ..............................23
FOSSIL FUEL A PPLICATIONS ...................................24
115 V
OLT LINE CONNECTION OF ACCESSORIES
(HUMIDIFIER AND ELECTRONIC AIR CLEANER) .............24
AUXILIARY A LARM SWITCH: ...................................25
GAS SUPPLY AND PIPING......................................25
HIGH ALTITUDE DERATE ......................................25
PROPANE GAS CONVERSION ...................................25
GAS PIPING CONNECTIONS ....................................26
PROPANE GAS TANKS AND PIPING .............................28
CIRCULATING AIR & FILTERS ................................29
DUCT WORK - AIR FLOW ....................................29
CHECKING DUCT STATIC ......................................29
BOTTOM RETURN AIR OPENING [UPFLOW MODELS] ............30
FILTERS - READ THIS SECTION BEFORE INSTALLING
THE RETURN AIR DUCT WORK ..........................30
UPRIGHT INSTALLATIONS ......................................30
HORIZONTAL INSTALLATIONS ...................................31
STARTUP PROCEDURE & ADJUSTMENT .....................31
DRAIN TRAP PRIMING ........................................31
FURNACE OPERATION ........................................31
GAS SUPPLY PRESSURE MEASUREMENT .........................31
GAS MANIFOLD PRESSURE MEASUREMENT AND A DJUSTMENT......33
GAS INPUT RATE MEASUREMENT (NATURAL GAS ONLY) .........33
TEMPERATURE RISE ..........................................34
CIRCULATOR BLOWER SPEEDS .................................34
BLOWER HEAT OFF DELAY TIMINGS ...........................36
COMFORTNET™ SYSTEM .....................................37
OVERVIEW .................................................37
AIRFLOW CONSIDERATIONS ....................................37
FOSSIL FUEL A PPLICATIONS ...................................37
CTK0* WIRING .................................................38
COMFORTNET SYSTEM A DVANCED FEATURES ....................38
FURNACE ADVANCED FEATURES MENUS ........................39
THERMOSTAT MENU .........................................41
DIAGNOSTICS ................................................41
NETWORK TROUBLESHOOTING .................................41
SYSTEM TROUBLESHOOTING...................................42
NORMAL SEQUENCE OF OPERATION ........................42
POWER UP .................................................42
HEATING MODE .............................................42
COOLING MODE ............................................42
FAN ONLY MODE ...........................................43
OPERATIONAL CHECKS .......................................43
SAFETY CIRCUIT DESCRIPTION..............................43
INTEGRATED CONTROL MODULE ..............................43
PRIMARY LIMIT ..............................................43
AUXILIARY LIMIT .............................................43
ROLLOUT LIMIT .............................................43
PRESSURE SWITCHES .........................................43
FLAME SENSOR .............................................43
TROUBLESHOOTING ..........................................43
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ................43
DIAGNOSTIC CHART ..........................................44
RESETTING FROM LOCKOUT ..................................44
MAINTENANCE .................................................44
ANNUAL INSPECTION .........................................44
FILTERS ....................................................44
BURNERS ...................................................45
INDUCED DRAFT AND CIRCULATOR BLOWERS ....................45
CONDENSATE TRAP AND DRAIN SYSTEM
(QUALIFIED SERVICER ONLY) ...........................45
FLAME SENSOR (QUALIFIED SERVICER ONLY) ..................45
FLUE PASSAGES (QUALIFIED SERVICER ONLY) ..................45
BEFORE LEAVING AN INSTALLATION ........................45
REPAIR AND REPLACEMENT PARTS..........................45
DIP SWITCHES .................................................46
STATUS CODES ................................................47
TROUBLESHOOTING CHART .................................48
WIRING DIAGRAM .............................................54
SPECIAL INSTRUCTIONS FOR PRODUCTS INSTALLED ....55
IN THE STATE OF MASSACHUSETTS ........................55