Whirlpool WGD94HEXW Instruction Manual - Page 4

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WARNING:

To reduce the risk of fire, this dryer MUST BE

EXHAUSTED OUTDOORS.

NOTE: This guide is intended to aid licensed HVAC or

Architectural Engineers who design single and multi-dryer unit

venting systems for Whirlpool Corporation dryers sold in the

United States. Whirlpool Corporation provides required airflow

and back pressure specifications, measured at the connection

between the vent system and the dryer's vent pipe, for use in the

design of dryer vent systems. Whirlpool does not design multi-

dryer vent systems, nor does Whirlpool review or provide

approvals for vent systems designed by third-party engineering

firms.

Outside Exhaust

The four basic reasons for exhausting a dryer outdoors are

detailed in this section:

1. To meet codes requirements.

2. To remove moisture from laundry area.

3. To avoid lint accumulation in laundry area.

4. To remove excess heat from laundry area.

Codes Requirements

The following codes should be reviewed to ensure dryer vent

systems are in compliance:

1. International Mechanical Code: 2009 version, sections 504

and 913.

2. National Fuel Gas Code.

3. UL 2158 Electric Clothes Dryer Standard references venting

requirements.

4. ANSI Z21.5.1 - Gas Clothes Dryers.

5. Other sections of these codes may also apply to multi-dryer

vent systems.

There are other codes requiring dryers to be exhausted when

installed in confined spaces where specified clearances from

combustible surfaces cannot be met. See the Installation

Instructions for the specific dryer model being used or considered

for spacing requirements.

INSTALLATION REQUIREMENTS

Local codes and ordinances that exist must also be met. Consult

your local building inspector for more information.

Moisture

A normal towel load contains some residual water when it is

removed from the washer. The dryer must remove this water and

discharge it from the drum. When the dryer is not exhausted

outside, this moist air will be recirculated through the dryer,

reducing its efficiency.

Exhausting moisture into the room can also cause damage to

walls, floors, picture hangers, and cause condensation on

windows and walls in cold weather.

Lint

Even though the dryer is equipped with a lint screen, fine particles

of lint will pass through the screen and be exhausted out of the

dryer. Proper venting of the dryer will keep lint from accumulating

in the laundry area.

Heat

In order to remove moisture from the garments in the dryer, heat is

generated to vaporize the water. Exhausting the dryer outdoors

removes excess heat from the laundry area of the building.

Central Exhaust System Requirements

The following guidelines should be considered in the design of

any central exhaust system:

■

Exhaust individual dryers to the central exhaust duct system

with proper size vents to assure adequate performance of

each dryer. The dryer has 4" (102 mm) exhaust duct

connections. Connect each dryer to the central vent with a 4"

(102 mm) diameter aluminum vent.

■

Install weighted dampers on each individual dryer exhaust

duct. These dampers may be used for balancing out the

overall duct system.

■

Design the central duct system for sufficient capacity to

handle the maximum number of dryers operated at one time.

■

Consider moisture, lint and air temperature in the design of the

central duct system. Maximum exhaust temperature of the

dryer will not exceed 200°F (93.3°C) when the dryer is

operated according to the instructions provided with the dryer.

■

Provide for periodic inspection and clean-out of lint

accumulated in the central duct system.

Exhaust System Requirements

Venting systems for Whirlpool dryers must meet the following

requirements:

■

The capacity to handle up to 230 CFM (cubic feet per minute)

of air flow for each dryer in the system.

■

A minimum back pressure of -0.1" (-2.5 mm) water column

(vacuum) when measured at the connection to the dryer.