Johnson Controls Unitary Products MG9S Series User's Information Manual

USER'S INFORMATION MANUAL
33" MULTI-POSITION GAS FURNACES
(Manufactured Housing or
Modular Home Applications)
MODELS: MG9S SERIES
CONTACT INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTRUCTIONS FOREXAMINING THE
FURNACE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
START-UP AND SHUTDOWN INSTRUCTIONS . . . . . . . . . . . . . . . . 2
HOW YOUR GAS FURNACE WORKS . . . . . . . . . . . . . . . . . . . . . . 3
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
TO TURN OFF THE APPLIANCE . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FURNACE MAINTENANCE - USER INFORMATION . . . . . . . . . . . . 4

CONTACT INFORMATION

• Go to website at www.york.com, then click on "Contact Us" and
follow the instructions.
• Contact us by mail:
The manufacturer recommends that the user read all sections
of this manual and keep the manual for future reference.
SECTION I: SAFETY
WARNING
!
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 liq-
uids 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 (includ-
ing cell phone) in your building.
• Leave the building immediately.
• Immediately call your gas supplier from a neighbor's phone. Fol-
low 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 supplier.
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.
Understand and pay particular attention to the signal words DANGER,
WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation, which, if not
avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation, which, if not
avoided may result in minor or moderate injury. It is also used to alert
against unsafe practices and hazards involving only property damage.
1. The furnace area must be kept clear and free of combustible materi-
als, gasoline and other flammable vapors and liquids.

TABLE OF CONTENTS

EXTERNAL AIR FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
BLOWER CARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
MOTOR LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
SERVICE INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
TROUBLESHOOTING PROBLEMS . . . . . . . . . . . . . . . . . . . . . . . . .5
FURNACE CONTROL DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . .5
FURNACE MAINTENANCE - DEALER/CONTACTOR . . . . . . . . . .5
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
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 on the furnace or the "START-UP AND
SHUTDOWN INSTRUCTIONS" section 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 sup-
ply.
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 con-
trols, control system parts, electrical parts that have been wet or the
furnace if deemed necessary.
7. NEVER. . .Store flammable materials of any kind near your furnace.
Gasoline, solvents, and other volatile liquids should be stored only
in approved containers outside your home. These materials vapor-
ize easily and are extremely dangerous.
8. NEVER . .Store cleaning materials near your furnace. Materials
such as bleaches, detergents, powdered cleansers, etc., can cause
corrosion of the heat exchangers.
9. NEVER . . . Use the area around your furnace as a storage area for
items which could block the normal flow of air. This flow of air is
required for ventilation of the various furnace components.
Johnson Controls Unitary Products
Consumer Relations
5005 York Drive
Norman, OK 73069
5165698-UUM-A-1215