Johnson Controls 33” Multi-position Gas Furnaces, MG9S User's Information Manual

USER’S INFORMATION
MANUAL

MODELS:
33” Multi-position Gas Furnaces

(Manufactured Housing or Modular Home Applications)

TABLE OF CONTENTS

SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

INSTRUCTIONS FOR EXAMINING 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

EXTERNAL AIR FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

How to Clean your Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Removing Filters For Manufactured (Mobile) Home And Modular
Home Installations Using A Return Air Duct System And Plenum 4

CONTACT INFORMATION FOR USA CONTACT INFORMATION FOR CANADA

• Contact us by mail:

DISTRIBUTED BY:
StyleCrest
801 W. 37th Street
Building #7
Wichita, Ks 67219

• Manufacturer:

Johnson Controls Unitary Products

Removing Filters For Manufactured (Mobile) Home
And Modular Home Installations Without A Return

Air Duct System And Plenum . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

BLOWER CARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

• Go to website at www.york.com click on “contact”, then click on
“contact form” and follow the instructions.

• Contact us by mail:

Johnson Controls Unitary Products

Consumer Relations

5005 York Drive

Norman, OK 73069

We recommend that the user read all sections of this
manual and keep the manual for future reference.

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 supplier.

SECTION I: SAFETY

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.
alert against unsafe practices and hazards involving only property dam­age.

1. The furnace area must be kept clear and free of combustible mate­rials, 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 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
supply.

6. Do not use this furnace if any part has been under water. A flood­damaged furnace is extremely dangerous. Attempts to use the fur­nace 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.

.

It is also used to

420706-UUM-C-0112

420706-UUM-C-0112

Vent Pipe

Pressure
Switch

Manifold
Pipe

Rollout
Safety Switch

Gas Valve

Flame Sensor

Manifold Draft
Assembly

Limit Switch

Ignitor

Safety
Door Switch

Control
Board

Electrical
Junction Box

Blower

Transformer

Capacitor

Condensate
Pan

Silicone Tube

BLUE CONE PORTION OF FLAME SHOULD
ENTER HEAT EXCHANGER TUBE

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 vaporize 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.

FIRE OR EXPLOSION HAZARD
This furnace is designed and approved for use with Nat-

ural Gas and (LP) Propane Gas ONLY. DO NOT BURN
ANY LIQUID FUEL OR SOLID FUEL IN THIS FURNACE.

Burning any unapproved fuel will result in damage to the
furnace heat exchanger, which could result in Fire, Per­sonal Injury, and/or Property Damage.

SECTION II: INSTRUCTIONS FOR
EXAMINING THE FURNACE
INSTALLATION

It is the owner’s responsibility to ensure that an annual inspection of the
entire heating portion of the unit is made by a qualified service agency.
Examine the furnace as outlined below in steps “1 - 8” before each
heating season. Use Figure 1 for visual reference.

3. Examine return connections

• For Modular Homes:
a. If the furnace has a return air duct, examine the return air

duct connections to make sure they are physically sound,
sealed to the furnace casing, and the ducts terminate out­side the space containing the furnace.

b. If the furnace does not have a return air duct, examine the

return air filter rack connections to make sure they are phys­ically sound, sealed to the furnace casing.

• For Manufactured (Mobile) Homes:
a. Examine the return air filter rack connections to make sure

they are physically sound, sealed to the furnace casing.

4. Examine the 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.

5. Examine the furnace casing for obvious signs of deterioration.

6. Examine the burner flames to make sure they are in good adjust­ment. Refer to the pictorial sketch shown in Figure 2 as a compari­son to the actual flame.

FIGURE 1: Component Location - 95% Single Stage Models

1. Examine the heat exchanger, vent pipe, combustion air passages,
vent connectors and chimney to be sure they are clear and free of
obstructions.

2. Examine the vent pipe making sure it is firmly in place, that it
slopes slightly upward and is physically sound without holes and
all of the connections are secure.

2 Johnson Controls Unitary Products

FIGURE 2: Burner Flame Drawing (Upflow Configuration Shown)

7. Examine and replace external air filters as needed to make sure
they are not blocked, and proper airflow is provided to the furnace.

8. Examine any installed accessories or system components such as
evaporator coils to insure proper operation, drainage of conden­sate, and that there is no water leakage or damage to the furnace
or any components.

SECTION III: START-UP AND SHUTDOWN
INSTRUCTIONS

Read the Instructions Below Before Trying to Start the
Furnace!

If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, personal
injury, and/or loss of life.