HP 422690 I SECTION 1. IMPORTANT SAFETY RULES, TABLE OF CONTENTS, Rule, Rule, Rule, Rule, Rule, Rule, Rule, WARNING:, WARNING:

TABLE OF CONTENTS
SECTION 1. IMPORTANT SAFETY RULES.............................................................................................................	2
SECTION 2. MEETING CODES ..............................................................................................................................	3
SECTION 3. DETERMINING BEST FURNACE LOCA TION ......................................................................................	3
SECTION 4. PROVIDING VENTING AND COMBUSTION AIR..................................................................................	5
SECTION 5. CONDENSATE DRAIN.......................................................................................................................	14
SECTION 6. INSTALLING GAS PIPING..................................................................................................................	14
SECTION 7. INSTALLING ELECTRICAL WIRING ...................................................................................................	15
SECTION 8. SEQUENCE OF OPERATION ............................................................................................................	17
SECTION 9. INSTALLING DUCT SYSTEM .............................................................................................................	18
SECTION 10. SELECTING AND INSTALLING FILTER CABINETS ..........................................................................	18
SECTION 11. CHECKS BEFORE STARTING FURNA CE ........................................................................................	20
SECTION 12. GAS SUPPLY PRESSURE AND PILOT ADJUSTMENT.....................................................................	20
SECTION 13. MANIFOLD PRESSURE ADJUSTMENT ...........................................................................................	21
SECTION 14. CHECKING GAS INPUT RATE .........................................................................................................	21
SECTION 15. DERATING FOR HIGH ALTITUDE ....................................................................................................	22
SECTION 16. DETERMINING CORRECT ORIFICE SIZE ........................................................................................	22
SECTION 17. CHANGING MAIN BURNER ORIFICES ............................................................................................	23
SECTION 18. ADJUSTING BLOWER SPEED.........................................................................................................	24
SECTION 19. MEASURING DUCT SYSTEM STATIC PRESSURE ..........................................................................	24
SECTION 20. MEASURING AIR TEMPERATURE RISE ..........................................................................................	25
SECTION 21. CHECKING CONTROLS ..................................................................................................................	25
SECTION 22. SETTING BLOWER TIMINGS...........................................................................................................	26
SECTION 23. MAINTAINING FURNACE IN GOOD WORKING ORDER ...................................................................	26
SECTION 24. ACCESSORIES .............................................................................................................................	27
SECTION 25. OTHER INFORMATION AND PUBLICATIONS ..................................................................................	27

SECTION 1. IMPORTANT SAFETY RULES

To alert you to potential hazards, we use the signal words "WARNING" and "CAUTION" throughout this manual. "WARNING" alerts you to situations that could cause or result in serious injury or death. "CAUTION" alerts you to situations that could cause or result in minor or moderate injury or property damage. For a safe and reliable installation be sure to read and follow all warnings and cautions.

We also use the words "must" and "should" in this manual. "Must" is mandatory. "Should" is advisory.

WARNING: Read and follow the safety rules in this section and throughout this manual. Failure to do so could cause improper furnace operation, resulting in damage, injury or death.

Rule 1. Use only gas approved for use in this furnace, as indicated on furnace rating plate. Use only natural gas in furnaces designed for natural gas. Use only propane (LP) gas in furnaces designed for propane (LP) gas. Make sure furnace will operate properly on the gas type available to user. Do not use butane gas in this furnace.

WARNING: Use of a non-approved gas (such as butane) in this furnace could cause sooting or overheating of heat exchanger.

Rule 2. Do not install this furnace outdoors or in a mobile home, trailer or recreational vehicle. It is not design certified for these installations. This furnace is suitable for a home built on site or a manufactured home completed at the final site.

Rule 3. Air for combustion must not come from a corrosive or contaminated atmosphere. Make sure all combustion and ventilation air requirements are adhered to in addition to local codes and ordinances.

Rule 4. This furnace is not to be used for temporary heating of buildings or structures under construction.

Rule 5. Provide adequate combustion and ventilation air to space where furnace is being installed unless combustion air is provided directly through an inlet air pipe. Connect this furnace to an approved vent system--venting combustion products outdoors.

Rule 6. Check for gas leaks anytime work is done on gas supply line, furnace gas control, pilot and pilot line or main burner manifold.

Rule 7. Never test for gas leaks with an open flame. Use a commercial soap solution made specifically for leak detection to check all connections.

Page 2 Installer’s Information Manual