Category I Venting (Vertical Venting) - Maytag Amana MES80 Series Manual

If this furnace is to be installed in the same space with other
gas appliances, such as a water heater, ensure there is an ad-
equate supply of combustion and ventilation air for all applianc-
es. Refer to the latest edition of the National Fuel Gas Code
NFPA 54/ANSI Z223.1 or CAN/CSA B149 Installation Codes or
applicable provisions of the local building codes for determining
the combustion air requirements for the appliances.
This furnace must use indoor air for combustion. It cannot be
installed as a direct vent (i.e., sealed com bustion) furnace.
Most homes will require outside air be supplied to the fur-
nace area by means of ventilation grilles or ducts connecting
directly to the outdoors or spaces open to the outdoors such
as attics or crawl spaces.
CATEGORY I VENTING
(VERTICAL VENTING)
To prevent possible personal injury or death due to
asphyxiation. This furnace must be Category I vented. Do not
vent using Category III venting.
Category I Venting is venting at a non-positive pressure. A
furnace vented as Category I is considered a fan-assisted
appliance and the vent system does not have to be "gas
tight". NOTE: Single stage gas furnaces with induced draft
blowers draw products of combustion through a heat ex-
changer allowing, in some instances, common venting with
natural draft appliances (i.e. water heaters). All installations
must be vented in accordance with National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest edition. In Canada, the furnac-
es must be vented in accordance with the National Standard
of Canada, CAN/CSA B149.1 and CAN/CSA B149.2 - latest
editions and amendments.
NOTE: Masonry vent kit (MVK-01 and MVK-02) is
to only be used on interior masonry chimneys or
qualifying exterior masonry chimney applications
identified in the MVK kit installation instructions.
To ensure safe and reliable operation, use only the
kit listed for your model.
Kit Input KBTU Range
MVK-01
MVK-02
NOTE: This kit is for use on 80% AFUE, 33" tall *MES80
model furnaces installed in the up flow position only.
NOTE: The vertical height of the Category I venting
system must be at least as great as the horizontal
length of the venting system.
WARNING
Limit Setting
40-100 250°F
120-140 290°F
To prevent possible personal injury or death due to
asphyxiation, common venting with other manufacturer's
induced draft appliances is not allowed.
The minimum vent diameter for the Category I venting sys-
tem is as shown:
MODEL
UPFLOW
40
60
80
100
120
140
Under some conditions, larger vents than those shown
above may be required or allowed. When an existing furnace
is removed from a venting system serving other appliances,
the venting system may be too large to properly vent the
remaining attached appliances.
Upflow or Horizontal units are shipped with the induced
draft blower discharging from the top of the furnace. ("Top" is
as viewed for an upflow installation.) The induced draft blow-
er can be rotated 90 degrees with the (0270F01119) chim-
ney transition bottom kit for Category I venting. For upflow
models installed vertically or horizontally, a four inch single
wall pipe can be used to extend the induced draft blower
outlet 1/2" beyond the furnace cabinet. THIS PRODUCT IS
NOT DESIGNED FOR COUNTERCLOCKWISE INDUCED
DRAFT BLOWER ROTATION.
Vent the furnace in accordance with the National Fuel Gas
Code NFPA 54/ANSI Z223.1 - latest edition.
Venting - Furnace Installed in Horizontal Position
THIS FURNACE IS NOT DESIGN CERTIFIED TO BE HOR-
IZONTALLY VENTED THROUGH AN EXTERIOR SIDE
WALL.
The following describes an optional venting procedure when
the furnace is installed in the horizontal left discharge position.
To rotate the induced draft blower clockwise, you will need
to purchase one (0270F01119) chimney transition bottom kit.
1. Disconnect electrical power from the furnace.
2. Disconnect the induced draft blower power leads, flue
pipe, and pressure switch tubing.
3. Remove the round cutout from the right side of the
wrapper.
4. Remove and save the four screws that fasten the
induced draft blower to the flue collector box.
5. Remove and save the three screws that hold the chim-
ney assembly to the induced draft blower.
6. Remove and save the four screws that fasten the
chimney top to the chimney bottom.
10
WARNING
MINIMUM VENT
COUNTERFLOW
4 Inch 4 Inch
4 Inch 4 Inch
4 Inch 4 Inch
5 Inch 5 Inch
5 Inch N/A
5 Inch N/A