Dri-Eaz Dri-X Airchanger Manual do Proprietário - Página 4

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1. Operating Principles

outdoors. The unit achieves this benefit without

causing security problems or excess energy loss.

Two airstreams pass through the Dri-X. They

introduce outdoor air to the restoration environ-

ment, while at the same time expelling indoor air

from the building.

One airstream takes air from a room and blows

it outdoors. This airstream not only carries the ex-

cess humidity, it also exhausts pollutants including

odors, mold spores, dust, allergens and pathogens.

All are removed harmlessly to the outdoors.

Meanwhile, in the second airstream, dry, fresh,

clean air from outside the room or building is

pulled through the Dri-X in the other direction and

blown into the room.

While passing through the Energy Exchange

Core, the airstreams exchange heat, thus retaining

the energy of the building's heating or air condi-

tioning systems.

The difference between indoor and outdoor

temperature and specific humidity conditions is

measured in grains per pound (specific humidity).

This difference determines the Dri-X's efficiency

in reducing humidity. The greater the difference,

the more effective the unit. That is, the drier the

air outdoors, compared to the air indoors, the

faster the Dri-X reduces indoor humidity and

speeds the drying process.

Operating Position and Storage Position

During

Operation

The Dri-X must always be operated in the horizontal position. It

can be transported or stored in the upright position as shown.

When the air is much colder outdoors than in-

doors, and the indoor air is very humid, some of

the outgoing moisture condenses in the Energy

Exchange Core. This condensed water drains out

of the Core into the drip tray, where it collects and

is pumped out. A 40-foot hose from the unit is

placed in any convenient drain.

The amount of moisture being pumped out is

only a small percentage of the water being re-

moved from the room. A much greater amount is

being removed as invisible water vapor in the air-

stream passing to the outdoors. You cannot judge

the effectiveness of the Dri-X by measuring the

water coming from the pump hose; you can only

judge it by calculation. See the section on Esti-

mating Water Removal.

Use When Outdoor Air is Dry

To know if the Dri-X Airchanger will efficient-

ly remove humidity on any job, you must know

that the outdoor air is actually drier than the indoor

air. You can do this easily using a thermo-

hygrometer, plus the Calculator provided with the

Dri-X or a standard psychrometric chart.

Outdoor air is quite often drier than indoor air,

especially in restorative drying situations. The

section on Water Removal Rates will help you un-

derstand this fact. In many areas of the country, at

many times, outdoor air is drier that the air indoors

during a water damage situation with high indoor

humidity.

When outdoor air is "wetter" than indoor air

(again, as measured in grains per pound), the Dri-

X should not be used because it would actually

raise the indoor humidity. This would sometimes

be the case in areas such as the South Atlantic and

Gulf Coast states, or the Midwest in the summer

on days of high humidity. When outdoor air is

wetter, the Dri-X should be turned off.

During

When the specific humidity or grains per pound

Storage

of the outdoor air and the indoor air are the same,

no change in the indoor humidity will result.

However, at these times the Dri-X can still be used

to improve IAQ by exchanging the indoor and

outdoor air.

Outdoor Air is Usually Cleaner

Indoor air quality in a water-damaged building

can be uncomfortable and even unhealthy. Con-

taminants may include offensive odors activated

and released by water, dust from moving furniture