Whirlpool LER3622PQ - Manual (Page 6)

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■ For closet installation, with a door, minimum ventilation
openings near the top and bottom of the door are required.
Louvered doors with equivalent ventilation openings are
acceptable.
■ Companion appliance spacing should also be considered.
Recommended room venting and installation spacing for
recessed or closet installation, with stacked washer
and dryer
48 in. 2 *
(310 cm 2 )
3"* (76 mm)
3"* (76 mm)
1"* (25 mm) 24 in. 2 *
(155 cm 2 )
*Recommended spacing.
“AF” Code
Certain electronic dryer models have airflow detection
capabilities. (See specific model product literature for details). If
the airflow in the dryer is extremely low, an “AF” code will be
displayed on the control panel. For single dryer venting systems,
this code means that you may have a blocked or partially blocked
vent or that your overall vent system length is too long. To resolve
this issue:
■ Check to see if the vent run from the dryer to the wall is
crushed. Refer to the “Venting Requirements” section of
the Use and Care Guide for more information.
■ Confirm that the vent run from the dryer to the wall is free
of lint and debris.
■ Confirm that the exterior vent exhaust hood is free of lint
and debris.
■ Confirm that your vent system falls within the
recommended run length and number of elbows
for the type of vent you are using. Refer to the “Plan
Vent System” section of the Use and Care Guide for
details.
■ Select a Timed Dry heated cycle, and restart the dryer.
■ If the message persists, have your entire home venting run
cleaned.
For multi-dryer venting systems, the “AF” code means that your
vent may be blocked or partially blocked or that the venting
system is creating back pressure in excess of the maximum
allowed. In this case, the engineering firm that designed the
system should be consulted.
Multiple Dryer Venting Systems
Multiple dryer venting systems must be designed specifically for
each application.
NOTE: It is recommended that an architectural or HVAC
engineering firm be consulted for designing the dryer venting
system.
Connecting a number of dryers to a single vent system is
common in coin-laundry stores and in many apartment
buildings. Listed here are some requirements for examples
of three different multiple dryer venting systems.
Option 1 - Horizontal System
The most common is the horizontal system, in which banks of
dryers are all located in one room and vented through a common
duct. See the following illustration for an example of a generic
horizontal system.
A. 4" (102 mm) diameter rigid metal back draft damper
*Minimum spacing required between dryers
Option 2 - Vertical System
The vertical system is used in some apartment buildings that have
a washer and dryer on each floor. Each dryer is exhausted into the
same central vertical duct. See the following illustration for an
example of a generic vertical system.
A. Maximum back pressure measurement location
B. Weighted dampers
C. Individual dryer exhaust - on each floor
D. 0.1" (2.5 mm) water column maximum vacuum
E. Main duct
F. Barometric damper (use depends on exhaust
system design)
G. Source of outside air