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USER'S INFORMATION,
MAINTENANCE AND
SERVICE MANUAL
HIGH EFFICIENCY
TUBULAR HEAT EXCHANGER SERIES
MODEL: AHS8*UH
(Single Stage Upflow / Horizontal / Low NOx)
CONTACT INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
USER'S INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FURNACE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
HOW YOUR GAS FURNACE WORKS . . . . . . . . . . . . . . . . . . . . . . 3
START-UP AND SHUTDOWN INSTRUCTIONS . . . . . . . . . . . . . . . 3
Operating Instructions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
To Turn Off the Appliance: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FURNACE USER MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . 4
Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Removing Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Blower Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Motor Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SERVICE AND MAINTENANCE MANUAL . . . . . . . . . . . . . . . . . . . . 5
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:
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 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.
TABLE OF CONTENTS
SAFETY SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
FURNACE MAINTENANCE SECTION . . . . . . . . . . . . . . . . . . . . . . .5
FURNACE CLEANING SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Burner Removal/Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Cleaning the Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Continuous Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Intermittent Blower - Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Heating Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Hot Surface Ignition System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
FURNACE CONTROL DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . .7
DIAGNOSTIC FAULT CODE STORAGE AND RETRIEVAL . . . . . .8
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
REPLACEMENT PART CONTACT INFORMATION . . . . . . . . . . . . .10
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
York International
Consumer Relations
5005 York Drive
Norman, OK 73069
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.
EFFICIENCY
RATING
CERTIFIED
ISO 9001
Certified Quality
Management System
269425-UUM-A-0407
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Table of Contents
Related Manuals for York AHS8 UH Series
Summary of Contents for York AHS8 UH Series
-
Page 1: Table Of Contents
SERVICE AND MAINTENANCE MANUAL ....5 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:... -
Page 2: Instructions For Examining The Furnace Installation
269425-UUM-A-0407 INSTRUCTIONS FOR EXAMINING THE FURNACE VENT PIPE INSTALLATION FLUE PRESUURE COLLAR SWITCH It is the owner’s responsibility to ensure that an annual inspection of the INDUCED DRAFT ASSEMBLY entire heating portion of the unit is made by a qualified service agency. SILICONE INDUCED DRAFT TUBE... -
Page 3: How Your Gas Furnace Works
269425-UUM-A-0407 HOW YOUR GAS FURNACE WORKS To Turn Off the Appliance: Set the thermostat to lowest setting. Your furnace is a very easy appliance to take for granted. Season after season, it sits there in your home, keeping you warm and comfortable. Turn off all electric power to the appliance if service is to be per- For this reason, you may never have given much thought to the way formed. -
Page 4: Furnace User Maintenance
269425-UUM-A-0407 FURNACE USER MAINTENANCE If all components appear to be in good operating condition, replace the front panels. Turn ON the gas and electrical power supplies to the fur- nace, and set thermostat to the desired temperature. Air Filters Before proceeding, be sure the area is well ventilated. Turn Dirty filters greatly restrict the flow of air and may cause damage to the the thermostat OFF. -
Page 5: Service And Maintenance Manual
269425-UUM-A-0407 SECTION II: SERVICE AND MAINTENANCE Burners may be cleaned by rinsing in hot water. MANUAL Reassemble the burners in the reverse order. SAFETY SECTION Cleaning the Heat Exchanger The following safety rules must be followed when servicing the Lower Heat Exchanger Access furnace. -
Page 6: Sequence Of Operation
269425-UUM-A-0407 SEQUENCE OF OPERATION Heating Cycle The following describes the sequence of operation of the furnace. Refer When the thermostat switch is set on HEAT and the fan is set on AUTO, to Figure 1 for component location. and there is a call for heat, a circuit is completed between terminals R and W of the thermostat. -
Page 7: Troubleshooting
269425-UUM-A-0407 TROUBLESHOOTING 4 RED FLASHES: This indicates that a primary or auxiliary limit switch has opened its normally closed contacts. With this fault code the control The following visual checks should be made before troubleshooting: will operate the supply air blower and inducer. This condition may be Check to see that the power to the furnace and the ignition control caused by: dirty filter, improperly sized duct system, incorrect blower module is ON. -
Page 8: Diagnostic Fault Code Storage And Retrieval
269425-UUM-A-0407 DIAGNOSTIC FAULT CODE STORAGE AND To retrieve the error codes, push the LAST ERROR button. The LED on RETRIEVAL the control will then flash the error codes that are in memory, starting with the most recent. There will be a two-second pause between each The control in this furnace is equipped with memory that will store up to flash code. -
Page 9: Replacement Parts List
269425-UUM-A-0407 SECTION III: REPLACEMENT PARTS LIST 38,43 TABLE 2: Field Installed Accessories - Non Electrical MODEL NO. DESCRIPTION USED WITH 1NP0347 PROPANE (LP) CONVERSION KIT ALL MODELS 1PS0301 40, 60 MBH HIGH ALTITUDE PRESSURE SWITCH KIT 1PS0302 80 MBH (Does Not Include Orifices) 1PS0311 100, 115, 130 MBH 1SR0302... -
Page 10: Replacement Part Contact Information
Click on the “Brand Links” button b. Click on the “Customer Service” button • You can contact us by mail. Just send a written request to: York International Consumer Relations 5005 York Drive Norman, OK 73069 Unitary Products Group... -
Page 11: Wiring Diagram
269425-UUM-A-0407 SECTION IV: WIRING DIAGRAM FIGURE 9: Wiring Diagram Unitary Products Group... - Page 12 For Owner's Information: PRODUCT MODEL. NO. ____________________ INSTALLATION DATE ______________________________ UNIT SERIAL NO. _________________________ INSTALLING DEALER ______________________________ Subject to change without notice. Printed in U.S.A. 269425-UUM-A-0407 Copyright © by York International Corp. 2007. All rights reserved. Supersedes: 166746-UUM-B-0706 Unitary 5005 Norman...