Unitary products group GY8S*DH Service Manual download pdf

268895-UUM-A-0407

USER’S INFORMATION,

MAINTENANCE AND

SERVICE MANUAL

HIGH EFFICIENCY

TUBULAR HEAT EXCHANGER SERIES

MODELS: GY8S*DH / GM8S*DH / LY8S*DH / LM8S*DH

(Single Stage Downflow/Horizontal / Standard & Low NOx)

EFFICIENCY

RATING

CERTIFIED

ISO 9001

Certified Quality

Management System

The manufacturer recommends that the user read all sections of this

manual and keep the manual for future reference.

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 prop-

erty 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 depart-

ment.

— Installation and service must be performed by a quali-

fied installer, service agency or the gas supplier.

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

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 . . . . . . . . . . . . . . . . . . . . . . . . . 3

Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Removing Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Blower Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Motor Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

SERVICE AND MAINTENANCE MANUAL . . . . . . . . . . . . . . . . . . . . 4

SAFETY SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

FURNACE MAINTENANCE SECTION . . . . . . . . . . . . . . . . . . . . . . .4

FURNACE CLEANING SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Burner Removal/Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Cleaning the Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Continuous Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Intermittent Blower - Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Heating Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Hot Surface Ignition System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

FURNACE CONTROL DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . .6

DIAGNOSTIC FAULT CODE STORAGE AND RETRIEVAL . . . . . .7

REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

REPLACEMENT PART CONTACT INFORMATION . . . . . . . . . . . .10

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

1 2 3 4 5 6 ... 11 12

Summary of Contents

Page 1 - SERVICE MANUAL

268895-UUM-A-0407USER’S INFORMATION,MAINTENANCE AND SERVICE MANUALHIGH EFFICIENCYTUBULAR HEAT EXCHANGER SERIESMODELS: GY8S*DH / GM8S*DH / LY8S*DH / LM

Page 2 - INSTALLATION

268895-UUM-A-040710 Unitary Products GroupTABLE 2: Field Installed Accessories - Non ElectricalMODEL NO. DESCRIPTION USED WITH1NP0347 PROPANE (LP) CON

Page 3

268895-UUM-A-0407Unitary Products Group 11SECTION IV: WIRING DIAGRAM FIGURE 8: Wiring Diagram*268834*

Page 4

Page 5

268895-UUM-A-04072 Unitary Products Group7. NEVER . . .Store flammable materials of any kind near your fur-nace. Gasoline, solvents, and other volatil

Page 6 - FURNACE CONTROL DIAGNOSTICS

268895-UUM-A-0407Unitary Products Group 3HOW YOUR GAS FURNACE WORKSYour furnace is a very easy appliance to take for granted. Season afterseason, it s

Page 7 - RETRIEVAL

268895-UUM-A-04074 Unitary Products GroupEvery time the filters are changed the following items should be visuallyinspected:• Check combustion air and

Page 8 - 8 Unitary Products Group

268895-UUM-A-0407Unitary Products Group 5FURNACE CLEANING SECTIONNOTE: The cleaning operations listed below must be performed only bya qualified servi

Page 9 - NOTE: *Not Shown

268895-UUM-A-04076 Unitary Products GroupIf the flame is not detected within 7 seconds of the gas valve opening,the gas valve is shut off and a retry

Page 10 - Norman, OK 73069

268895-UUM-A-0407Unitary Products Group 74 RED FLASHES: This indicates that a primary or auxiliary limit switchhas opened its normally closed contacts

Page 11 - *268834*

268895-UUM-A-04078 Unitary Products GroupSECTION III: REPLACEMENT PARTS LIST13132283925266,20112275443294530161521109841233724,36344467171912,35221173

Page 12 - Limited Warranty

268895-UUM-A-0407Unitary Products Group 9ITEM DESCRIPTIONMOTOR1 MOTOR,DIRECT DRIVE BLOWER2 MOTOR,VENTOR ASS’YELECTRICAL3 CAPACITOR (7.5MFD/370V)4 CONT

Unitary products group GY8S*DH Service Manual

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