mabe MKR62GWTWB Service Manual page 13

EXHAUSTING THE DRYER
Using exhaust longer than specified length will:
• Increase the drying times and the energy cost.
• Reduce the dryer life.
• Accumulate lint, creating a potential fire hazard.
The correct exhaust installation is YOUR RESPONSIBILITY.
Problems due to incorrect installation are not covered by the warranty.
The MAXIMUM ALLOWABLE length of
the exhaust system depends upon the
type of duct, number of turns, the type of
exhaust hood (wall cap) and all conditions
noted on the chart.
Internal elbows added for side or
bottom vent conversions must be included
in the total elbow count.
Any elbow greater than 45°
should be treated as a 90° elbow.
Two 45° elbows will be treated
like one 90° elbow.
For every additional 90° elbow,
reduce the allowable vent system length
by 3 m.
When calculating the total vent
system length, you must add all the
straight portions and elbows of the system
(including the transition duct).
EXHAUST SYSTEM CHECKLIST
Hood or wall cap
• Terminate in a manner to prevent back drafts or entry of birds or other wildlife.
• Termination should present minimal resistance to the exhaust airflow and should require little or no
maintenance to prevent clogging.
• Wall caps must be installed at least 30.5 cm above ground level or any other obstruction with the opening
pointed down.
Separation of turns
• For best performance, separate all turns by at least 1.2 m. of straight duct, including distance between
last turn and dampened wall cap.
Sealing of joints
• All joints should be tight to avoid leaks. The male end of each section of duct must point away from the
dryer.
• Duct joints should be made air- and moisture-tight by wrapping the overlapped joints with duct tape or
aluminum tape.
• Do not assemble ductwork with any fasteners that extend into the duct. These fasteners can accumulate
lint, creating a potential fire hazard.
• Horizontal runs should slope down towards the outdoors 1/4" per foot.
• Provide an access for inspection and cleaning of the exhaust system, especially at turns and joints.
Exhaust system shall be inspected and cleaned at least once a year.
Insulation
• Ductwork that runs through an unheated area or is near air conditioning should be insulated to reduce
condensation and lint buildup.
Service Engineering
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