Maytag MDG120 - Manual (Page 10)

FRESH AIR SUPPLY
When the dryer is operating, it draws in room
air, heats it, passes this air through the tumbler
and exhausts it out of the building. Therefore,
the room air must be continually replenished
from the outdoors.
If the make-up air is inadequate, drying time
and drying.efficiency will be adversely affected.
Ignition problems and sail switch “fluttering”
problems on gas dryers may result, and you
also could have premature motor failure from
overheating.
Air supply (make-up air) must be given careful
consideration to assure proper performance of
each dryer. An unrestricted source of air is
necessary for each dryer. An air flow of 2,150
CFM (cubic feet per minute) must be supplied.
As a general rule, an unrestricted air entrance
from the outdoors (atmosphere) of a minimum
of three (3) square feet is required for each
dryer.
If registers or louvers are installed over the
openings, then the area must be increased by
approximately 33 percent. Make-up air open­
ings
should not be located in an area directly
near where exhaust vents exit the building.
It is not necessary to have a separate make-up
air opening for each dryer. Common make-up
air openings are acceptable. However, they
must be set up in such a manner that the
make-up air is distributed equally to the dryers.
Example: For a bank of six (6) gas dryers, two
(2) openings measuring 3 feet by 3 feet (18
square feet) is acceptable.
* — 3’—• 3'—»
i I
3* 3'
1
------ Make Up Air Openings —^
O O O O O O
lyplcal Installation Showing
Make-Up Air Openings
Figure 6
Allowances must be made for remote or
constructing passageways or where dryers are
located at excessive altitudes or predominantly
low pressure areas.
IMPORTANT: Make-up air must be provided
from a source free of dry cleaning fumes.
Make-up air that is contaminated by dry clean­
ing fumes will result in irreparable damage to
motors and other dryer components
NOTE: Component failure due to dry cleaning
fumes voids warranty.
EXHAUST REQUIREMENTS
Exhaust duct work should be designed and
installed by a competent technician. Improperly
sized duct work will create excessive back
pressure which will result in slow drying,
increase use of energy, and shutdown of the
burner by the air flow (sail) switch, burner hi-
limit or lint chamber hi-heat protector thermo­
stat.
CAUTION: Dryer must be exhausted to the
outdoors.
CAUTION: Improperly sized or installed ex­
haust duct work can create a potential fire
hazard.
NOTE: When a dryer is exhausted separately,
it is recommended that a back draft damper be
installed.
NOTE: When a dryer is exhausted into a
common exhaust line, each dryer must be
supplied with a back draft damper.
ALL duct work should be smooth inside with
no projections from sheet metal screws or
other obstructions which will collect lint. When
adding ducts, the duct to be added should
overlap the duct to which it is to be connected.
ALL duct work joints must be taped to prevent
moisture and lint from escaping into the build­
ing. Inspection doors
should be installed at
strategic points in the exhaust duct work for
periodic inspection and clean-out of lint from the
duct work.
IMPORTANT: Exhaust back pressure mea­
sured by a manometer at each basket exhaust
duct area
should not exceed 0.3 inches of
water column.
NOTE: Where the exhaust duct work passes
through a wall, ceiling, or roof made of com­
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