HP 422690 I User's Information Manual
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Page 2 Installer’s Information Manual
TABLE OF CONTENTS
SECTION 1. IMPORTANT SAFETY RULES............................................................................................................. 2
SECTION 2. MEETING CODES .............................................................................................................................. 3
SECTION 3. DETERMINING BEST FURNACE LOCATION...................................................................................... 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 FURNACE ........................................................................................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.