Marley Engineered Products 3638R, 2438, 3038R User Manual
READ & SAVE THESE INSTRUCTIONS
MODELS
2438, 3038R & 3638R
WHOLE HOUSE VENTILATORS
CEILING INSTALLATION ONLY
NOTE: MODELS 3038R AND 3638R ARE AVAILABLE
FOR CEILING AND WALL INSTALLA TION.
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT
USE THIS FAN WITH ANY SOLID-STATE SPEED CONTROL DEVICE.
INTRODUCTION
Your Whole House Ventilator is designed and engineered to provide years of satisfactory service
in cooling and ventilating your entire house. Hot, humid air is drawn from the living areas and
replaced by cooler outside air. This cooler air may be routed through selected areas of the house
by opening the proper windows and doors. A3-speed control is supplied. A 12-hour timer, Model
1012A, is also available as an accessory.
The recommended method of installation for 16” O.C. joist construction with the 30” Whole House
fan, Model 3038R, (see pp. 3, 4, 5 & 6) completely eliminates all framing and cutting of ceiling
joists, thus providing the easiest installation available. The shutter for this installation is also
designed to give an attractive flush appearance without cutting the center joist.
LEAVE THIS MANUAL WITH HOMEOWNER.
HOT AIR OUT
HOT AIR OUT
COOL AIR IN
COOL AIR IN
IMPORTANT SAFETY INSTRUCTIONS
WARNING:
TO REDUCE THE RISK OF FIRE, ELECTRICALSHOCK
OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:
1. Do not use this fan with any Solid-State Speed Control Device.
2. Use this unit only in the manner intended by the manufacturer. If you have questions, contact the manufacturer.
3. Before servicing or cleaning this unit, switch power off at service panel and lock service panel to prevent power
from being switched on accidentally.
4. Installation work and electrical wiring must be done by qualified person(s) in accordance with all applicable codes
and standards, including fire-rated construction.
5. Sufficient air is needed for proper combustion and exhausting of gases through flue (chimney) of fuel burning
equipment to prevent back drafting. Follow the heating equipment manufacturer’s guideline and safety standards
such as those published by the National Fire Protection Association (NFPA), and the American Society for
Heating Refrigeration and Air Conditioning Engineers (ASHRAE), and the local code authorities.
6. CAUTION: For general ventilation use only! Do not use to exhaust hazardous or explosive materials and vapors.
7. When cutting or drilling into wall or ceiling, Do Not damage electrical wiring or other hidden utilities.
8. CAUTION: This unit has an unguarded impeller . Do not use in locations readily accessible to people or animals.
TOOLS AND MATERIALS REQUIRED
Tape Measure Screw Driver
Saber or Circular Saw Electric hand Drill
Electrical Connectors & Supplies as required Hammer & Nails
2 x 6 and/or 2 x 4 Wood Framing Materials are required
2 x 2 Furring Strips as required
Shutter - See text under Specific Installation for proper shutter
Power Tools should display the U.L. Listing Mark
ADDITIONAL MATERIALS REQUIRED FOR WALL INSTALLATION ONLY
3/4” Plywood as required. Door Case Molding or Equivalent
Wood Screws, Bolts, Nuts, Washers, Lock Washers as required.
CAUTION: CUTTING ROOF TRUSS IS NOT RECOMMENDED.
FAN TYPE OF OPENING FOR OVERALL SIZE CUT CEILING
MODEL SHUTTER INSTALLATION SHUTTER OF SHUTTER FINISH JOIST
2438 3224 HORIZONT AL 24” x 24” 26” x 26” WHITE YES
3038R 3230 HORIZONTAL 30” X 30” 32” X 32” WHITE YES
3038R A3024 HORIZONT AL 301⁄2” X 331⁄2” 32” X 36” WHITE NO
3638R 3236 HORIZONTAL 36” X 36” 38” X 38” WHITE YES
3038R 3130 VERTICAL 30” X 30” 331⁄8” X 331⁄8” ALUMINUM N/A
3638R 3136 VERTICAL 36” X 36” 391⁄4” X 391⁄4” ALUMINUM N/A
SHUTTERS TO BE USED
BE CAREFUL!
USE PROTECTIVE GLASSES AND FOLLOW ALL SAFETY RULES.
1
(1/2 A X B = AREA Sq. Ft.)
GABLE EXHAUST
(A X B = AREA Sq. Ft.)
EAVE
EXHAUST
(A X B = AREA Sq. Ft.)
GABLE EXHAUST
A TTIC AIR INT AKE AND DISCHARGE
Your Whole House Ventilator will be discharging a large volume of air into the attic every minute.
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 is probably the most satisfactory from the
standpoint of simplicity and economical installation. Make sure under-eave vents are not blocked
with ceiling insulation. The fan requires a given amount of exhaust outlet in order to ensure quiet
operation and unrestricted air movement. The table below shows the minimum area required for
proper operation of fan. Sufficient ventilation is very important. Unless enough is provided, the fan
motor will run hot, activating the thermal protector and shutting off the motor. When it cools, it will
restart. Such intermittent operation is usually an indication of too little outlet air or too little intake
air through the house.
MINIMUM ATTIC DISCHARGE AREAS REQUIRED
(All areas are in square feet)
FAN UNRESTRICTED* WOOD LOUVRE* METAL LOUVRE* SHUTTERS
SIZE OPENING REQD. OPENING REQD. OPENING REQD. AUTO. MAN. ETC.
24” 6.5 14.7 1 1.4 4
30” 9.2 20.7 16 6.3
36” 12 27 21 9
*If fly screen is used, double these values. If 1/2” hardware cloth or large mesh expanded metal are
used, the values given are sufficiently large. If no screen used, reduce values shown by 20%.
B (Ft.)
B (Ft.)
B (Ft.)
A (Ft.)
A (Ft.)
A (Ft.)
2
3
CEILING INSTALLATION — MODEL 3038
USED WITH AN A3024 SHUTTER ONLY
NO FRAMING OR CUTTING OF JOISTS REQUIRED FOR 16” O.C. JOISTS.
FAN LOCATION AND MOUNTING
STEP 1 - Fan should be located in center of house, preferably in hallway or corridor. This will allow air to
be drawn from all parts of living space. (See Fig. 1). Determine tentative location of fan and proceed as
shown below.
FIG. 1
FIG. 2
FIG. 3
FAN
OVERLAP AREA
PILOT HOLES
18” MIN.
CLEARANCE
R
O
O
F R
AFTE
R
S
STEP 2 - Determine joist direction and locate center joist in tentative fan opening. Lightly pencil a rectangular 301⁄2” x 331⁄2” opening on ceiling below where shutter is to be located, or 301⁄2” x 34” when opening
is used to pass fan housing (FAN HOUSING 34” X 34” X 6”) into attic. Make sure the longer side is
parallel to joist direction. Check to be sure that enough clearance area is available on ceiling for overlap
of shutter flanges. Drill two small pilot holes close to center joist, (one on either side) to indicate where hole
will be centered. (See Fig. 2.)
STEP 3 - Now clear insulation and find pilot holes in attic. Tentatively lay out same rectangular holes on
ceiling below. Adjust location of hole if necessary to ensure a minimum vertical clearance from roof rafters
of 18” above fan. (See Fig. 3.) There must be a minimum of 301/4” between the three joists and a maxi-
mum of 311/4” to allow proper installation of shutter. (See Fig. 4 & 5.)
STEP 4 - Carefully cut hole in ceiling, being careful not to cut into center joists. Cut along both sides of the
center joist, leaving the 11⁄2” (approximately) strip of ceiling sheet rock covering the center joist. If you have
2 x 4 joist construction, the joists on which the fan will be mounted must be built up to 2 x 6 joist height.
This can be done very easily at this point by nailing (3) 2 x 2 furring strips 40” long to the top of the joists,
one on each joist. (See Fig. 4 thru 7.)
4
FOR CEILINGS WITH JOISTS ON 16” CENTERS
MODEL A3024 SHUTTER
FOR CEILINGS WITH JOISTS ON 24” CENTERS
MODEL A3024 SHUTTER
FIG. 4 FIG. 5
FIG. 6
FIG. 7
EXISTING
2 X 6 JOISTS
(DO NOT CUT!)
EXISTING
2 X 4 JOISTS
(DO NOT CUT!)
EXISTING
2 X 6 JOISTS
(DO NOT CUT!)
EXISTING
2 X 4 JOISTS
(DO NOT CUT!)
2 X 2 X 40
FILLERS
2 X 6 FRAMING
2 X 6 FRAMING
2 X 2 X 40
FILLER
STEP 5A- If the access opening into the attic is not large enough for the fan to pass through, the fan may
be disassembled and lifted into the attic through the shutter hole which has just been cut. (See Step 2,
Page 3.) Disassemble the fan by removing the four bolts holding the channels to the housing as shown
in Fig. 8. The motor-blade assembly should be handled very carefully so as not to bend the fan blade. It
is not necessary to remove the fan blade in order to lift the motor-blade assembly between the joists. (See
Fig. 9.)
However, for an installer working alone, handling the parts will be more difficult, and therefore it may be
desirable to remove the fan blade to prevent damage. To remove the blade, loosen the two set screws in
the hub and slip the blade off. To reassemble the blade once the fan is in the attic, align the two set screws
with the flat on the shaft. Make sure the fan blade hub is flush with the end of the motor shaft and then
tighten both set screws securely (150 in-lbs recommended).
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