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292307-UUM-A-0108

USER’S INFORMATION,

MAINTENANCE AND 

SERVICE MANUAL

MODELS: PC9*DH, FC9C*DH, FL9C*DH

(Modulating Downflow/Horizontal With ECM Motor)

EFFICIENCY
RATING
CERTIFIED

ISO 9001

Certified Quality

Management System

The manufacturer recommends that the user read all sec-
tions of this manual and keep the manual for future refer-
ence.

 

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 Start-up and Shutdown Instructions
on Page 3 of this manual when lighting the furnace or turning the
furnace off.

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.

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.

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
START-UP AND SHUTDOWN INSTRUCTIONS  . . . . . . . . . . . . . . . 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

Summary of Contents for PC9 DH Series

Page 1: ...e furnace if deemed necessary 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...

Page 2: ...furnace casing making sure the physical support is sound without sagging cracks or gaps Examine the furnace base making sure it is physically sound without cracks gaps or sagging and has a good seal...

Page 3: ...afety information above 2 Set the thermostat to the lowest setting 3 Turn off all electric power to the appliance 4 Remove burner door 5 Move gas control switch to the OFF position Do not force 6 Wait...

Page 4: ...lations may have the air filter in a rack attached to the cas ing of the furnace or placed in the return air duct You can gain access to the filter by pulling on the door or unscrewing the retaining s...

Page 5: ...the gas supply at the external manual shut off valve and loosen the ground union joint 3 Remove the burner door and remove the burner box cover 4 Disconnect wires from flame sensor rollout switch and...

Page 6: ...le It provides a 30 second ramp up from zero airflow to full capacity and a 30 second ramp down from full capacity back to zero airflow Whenever there is a change in airflow mode such as from low heat...

Page 7: ...con trol board Five Red Flashes Rollout switch or auxiliary limit switch open Check the rollout switch on the side of the burner box It is a manual reset switch To reset push the small button in the...

Page 8: ...Group SECTION III REPLACEMENT PARTS LIST 2 7 13 14 11 5 9 37 10 80 46 45 47 54 64 19 18 27 28 33 30 35 72 71 69 68 1 2 4 5 6 14 15 16 62 55 56 54 21 23 22 31 26 25 59 48 57 60 53 44 43 51 52 49 50 18...

Page 9: ...PLUG WINDOW CLEAR 1 5 44 COMBUSTION AIR TRANSITION 3 WAY 45 TUBING SILICONE Gray 188 ID 2 83 ft Req d 46 TUBING SILICONE Preformed 47 TUBING SILICONE Gray 188 ID 1 25 ft Req d 48 GASKET COMBUSTION BL...

Page 10: ...7 1 2 CABINET 1CB0321 21 CABINET 1CB0324 24 1 2 CABINET 1TK0917 COIL TRANSITION KIT 17 1 2 CABINET 1TK0921 21 CABINET 1TK0924 24 1 2 CABINET REPLACEMENT PART CONTACT INFORMATION This is a generic part...

Page 11: ...292307 UUM A 0108 Unitary Products Group 11 SECTION IV WIRING DIAGRAM FIGURE 9 Wiring Diagram...

Page 12: ...products installed in the United States and Canada EXCLUSIONS This warranty does not cover any 1 Shipping labor or material charges 2 Damages resulting from transportation installation or servicing 3...

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