Whirlpool DryAire LMA1053L Specifications download pdf (Page 15)

DryAire Systems 14

2.2. Prevent Air Stratification

To prevent air stagnation in high ceiling pool enclosures, or if skylites require additional air

circulation a ceiling fan(s) is recommended. However, it should operate with an upward

air flow. This will provide an upward movement of room air against the ceiling without

affecting the evaporation of the pool water surface. Never install the ceiling fans directly

above the pool water.

2.3. Non-Ducted (Free Blow) Installation

When installation of a ducted air system is not possible, care must be taken to direct all

supply air toward exterior walls and windows. The dehumidifier should be located at a height,

usually no more than ten (10) feet above the floor, to permit easy access. A minimum 36”

long discharge duct must be equipped with horizontally adjustable, anodized alum. diffuser.

Be sure to allow adequate space for the return air to enter the back of the dehumidifier and

adequate space, without any obstructions, for the supply air outlet of the dehumidifier. This will

assure proper circulation of air for optimum performance.

2.4. Outdoor / Make-Up Air Applications

Codes for commercial buildings or new construction often require you to introduce outdoor

air when the space is being occupied.

SUPPLY

AIR

OUTDOOR (MAKE-UP) AIR

COMMERCIAL APPLICATION ONLY

RETURN

AIR

OUTDOOR

MAKE-UP AIR

D X 2

INSULATE

DryAire

Mode Damper Position

Occupied/Unoccupied Open

Loss of Air Flow Closed

• For Commercial application only when local code requires outside

make-up air. Usually 0.5 cfm per sq. ft. of pool surface area.

• Outdoor air flow must not exceed 30% of the total air flow thru unit.

• Outdoor air must be completely mixed with the return air.

• In cold climates, the outside air must be pre-heated to 50°F to prevent

freeze ups on the coil which can result in pressure safety trips.

• The contractor must install a two-position motorized damper and

appropriate insulated duct, per code and local regulations.

• The exhaust fan should be sized for the same CFM as the

outside air volume and be inter-locked to operate in

conjunction with the motorized outside air damper.

• Air flow balance must be established during start-up by the

installing contractor.

• The distance of the outdoor air duct connection from the

air filter should be at least 2(x) times the return duct height.

DAMPER-

SOME CODES

REQUIRE THE USE

OF SPRING RETURN

DAMPER.

Note: Dryaire systems are designed to handle a range of external

static pressures. In applications where strict outside air code

compliance is required, proper system airflow must be determined by

a professional balancing contractor. When approximation of outside

air volume is all that is necessary, the procedures detailed in Section

14.1 can be used.

Figure 2.4.1. Outdoor Air Application

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 40 41

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Whirlpool DryAire LMA1053L Specifications Page 15

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