STEP 7 — Nail frame assembly securely in place with 2 x 2 furring strips. See Fig. 17. Put moulding around outside of shutter as shown in Fig. 17. Moulding should be at least 4” wide. Caulk around moulding to provide a water-tight seal. Check shutter again to be sure it opens and closes freely.

STEP 8 — Wire fan to 120V power supply and 3-speed control. Follow steps 6 through 9 under wiring section of “CEILING INSTALLATION.”

STEP 9 — Fan installation is now complete. With control in “OFF” position turn on 120V power supply to fan. Test run fan through all speeds.

FIG. 12

FIG. 13

FIG. 14

FIG. 15

FIG. 16

FIG. 17

 

DOUBLE 2 X 6

HEADER

2 X 4 FRAMING

SECURE UNIT IN PLACE

WITH 2” X 2” FURRING

STRIPS INSIDE

FRAME HOLE AT

37” X 37”

SECURE UNIT IN PLACE

OUTSIDE WITH MOULDING

ATTIC AIR INTAKE AND DISCHARGE

Your wholehouse ventilator will be discharging a large volume of air into the attic every minute. It is obvious that provisions must be made to allow this air to escape to the outside. The sketches below illustrate several different types of exhaust vents that are in common usage. Of these types, the under-eave and gable methods are the most prevalent. Under-eave exhaust is probably the most satisfactory from the stand- point of simplicity and economical installation.

Each size fan requires a given amount of minimum outlet in order to insure quiet operation and unrestricted air movement. The table below shows the minimum area to be provided for each fan, and the increased size that is required if the outlet is restricted with louvres, screening, etc.

Sufficient outlet air is most important. Unless enough is provided, the fan will be overloaded, and the motor will run hot, causing the ther- mal protector to turn it off. When it cools, it will start again. Such intermittent operation is usually an indication of too little outlet air or too little input air through the house.

MINIMUM ATTIC DISCHARGE AREAS REQUIRED

(All areas are in square feet)

FAN

UNRESTRICTED*

WOOD LOUVER*

METAL LOUVER*

SIZE

OPENING REQD.

OPENING REQD.

OPENING REQD.

24”

8.5

19.2

15

B (Ft.)

 

 

B (Ft.)

 

 

 

 

 

B (Ft.)

 

A (Ft.)

 

 

 

(1/2 A x B = AREA Sq. Ft.)

 

A (Ft.)

 

GABLE EXHAUST

 

A (Ft.)

 

(A x B = AREA Sq. Ft.)

 

 

GABLE EXHAUST

(A X B = AREA Sq. Ft.)

 

 

 

EAVE

 

 

 

EXHAUST

— 6 —

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Marley Engineered Products A24DD manual Attic AIR Intake and Discharge, Minimum Attic Discharge Areas Required
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A24DD specifications

Marley Engineered Products has long been recognized for its innovative solutions in the field of HVAC and fluid handling technologies. One of its outstanding offerings is the A24DD unit, a high-performance fan and heater combination designed to maximize efficiency and comfort in various applications.

The A24DD is strategically engineered with a focus on versatility. It is suitable for use in industrial, commercial, and residential settings, making it a popular choice among contractors and facility managers. Its compact design allows for easy installation in tight spaces, which is ideal for businesses that need to optimize their operational areas without compromising on heating solutions.

A key feature of the A24DD is its advanced airflow technology. The unit utilizes a direct drive motor, which not only enhances energy efficiency but also reduces noise levels, providing a quieter environment. This characteristic is particularly beneficial in settings where noise pollution can affect comfort or productivity, such as offices and schools.

The A24DD is equipped with a robust heating element that ensures rapid heat distribution, contributing to a warm and comfortable atmosphere in no time. The built-in safety features, including over-temperature protection and adjustable thermostat controls, enhance user safety and comfort. This system provides users the flexibility to adjust the temperature settings to meet their specific needs, ensuring efficient energy use.

In terms of durability, the A24DD stands out with its high-quality materials and construction. It is designed to withstand harsh conditions, making it an excellent option for various industrial applications. The corrosion-resistant housing ensures longevity, while the easy maintenance features reduce the total cost of ownership.

Another highlight of the A24DD is the integration of smart technologies. It can be linked with existing building management systems, allowing for streamlined operation and energy monitoring. This capability not only supports energy efficiency goals but also aids in maintaining the operational reliability of heating systems.

In summary, the Marley Engineered Products A24DD unit combines flexibility, efficiency, and advanced technology, making it a top choice for those seeking reliable heating solutions across a broad spectrum of environments. With its user-friendly features and commitment to safety and efficiency, the A24DD is redefining comfort and performance in heating systems.
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