USER’S INFORMATION, MAINTENANCE AND SERVICE MANUAL
MODELS: PC9
(Modulating Downflow/Horizontal With ECM Motor)
EFFICIENCY
RATING
CERTIFIED
ISO 9001
Certified Quality
Management System
TABLE OF CONTENTS
CONTACT INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
USER’S INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTRUCTIONS FOR EXAMINING THE FURNACE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 HOW YOUR GAS FURNACE WORKS . . . . . . . . . . . . . . . . . . . . . . 3
Read the Instructions Below Before Trying to Start the
Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Operating Instructions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 To Turn Off the Appliance: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 FURNACE USER MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Blower Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Removing Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Motor Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SERVICE AND MAINTENANCE MANUAL . . . . . . . . . . . . . . . . . . . . . 5 SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
FURNACE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
FURNACE CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Burner Removal/Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Cleaning the Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Cleaning the Secondary Heat Exchanger . . . . . . . . . . . . . . . . . . .5
Cleaning the Vent / Air Intake System . . . . . . . . . . . . . . . . . . . . . .5
NORMAL OPERATION SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . .5
ADJUSTMENT OF FAN CONTROL SETTINGS . . . . . . . . . . . . . . . .6
Delay Taps Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Humidistat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Hot Surface Ignition System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
FURNACE CONTROL DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . .7
DIAGNOSTIC FAULT CODE STORAGE AND RETRIEVAL . . . . . .7
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 REPLACEMENT PART CONTACT INFORMATION . . . . . . . . . . . . .10 WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
CONTACT INFORMATION
•Go to website at www.york.com click on “contact”, then click on “contact form” and follow the instructions.
•Contact us by mail:
York International
Consumer Relations
5005 York Drive
Norman, OK 73069
The manufacturer recommends that the user read all sec- tions of this manual and keep the manual for future refer- ence.
FIRE OR EXPLOSION HAZARD - Failure to follow safety warnings exactly could result in serious injury, death, or property damage.
—Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
—WHAT TO DO IF YOU SMELL GAS:
•Do not try to light any appliance.
•Do not touch any electrical switch; do not use any phone (including cell phone) in your building.
•Leave the building immediately.
•Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
•If you cannot reach your gas supplier, call the fire department.
—Installation and service must be performed by a qualified installer, service agency or the gas sup- plier.
SECTION I: USER’S INFORMATION
SAFETY
1.The furnace area must be kept clear and free of combustible mate- rials, gasoline and other flammable vapors and liquids.
2.Insulating materials may be combustible. The furnace must be kept free and clear of insulating materials. The furnace area must be examined when installed in an attic or other insulated space or when insulation is added to be sure that the insulation material has been kept away from the furnace.
3.The furnace needs air for combustion in order to operate properly and safely. Do not block or obstruct air openings on the furnace, air openings to the area where the furnace is installed, or spaces around the furnace.
4.Follow the instructions exactly as shown on the OPERATING INSTRUCTION LABEL or the
5.Should the gas supply fail to shut off or if overheating occurs, shut off the gas valve to the furnace before shutting off the electrical supply.
6.Do not use this furnace if any part has been under water. A flood- damaged furnace is extremely dangerous. Attempts to use the fur- nace can result in fire or explosion. A qualified service agency should be contacted to inspect the furnace and replace all gas controls, control system parts, electrical parts that have been wet or the furnace if deemed necessary.
