GAF Master Flow Gable Mount Power Attic Vents Installation Instructions

GAF Master Flow Gable Mount Power Attic Vents

SAFETY CONSIDERATIONS & WARNINGS:

1. Use this unit only in the manner intended by GAF. If you have any installation questions, please contact Master Flow™ Technical Services at 1-800-211-9612.
2. For general ventilating use only. This ventilator has an unguarded impeller. Do NOT use in locations readily accessible to people or animals.
3. Do NOT use to exhaust hazardous material, dust, or combustible vapors.
4. During installation, always wear appropriate safety glasses, gloves, hard hats, restraints, and other safety equipment to avoid injury.
   Warning: Always wear durable work gloves while handling the unit.
5. Observe all applicable building and electrical codes.
6. Installation work and electrical wiring should be done by a qualified person in accordance with all building codes and the National Electrical Code (U.S. only), including codes for fire ratings. Contact a qualified electrician if you are not comfortable or familiar with electrical codes and/or installations.
7. The ventilator should be connected to a 120-volt, 60-hertz, grounded circuit only with a minimum 14-gauge wiring that has at least 3 amperes of available capacity. If you cannot confirm there is sufficient electrical capacity on an existing circuit, install a separate dedicated circuit. Do NOT use an extension cord to operate.
8. Inspect for hidden utilities before cutting or drilling. Do NOT damage electrical wiring or other hidden utilities when cutting or drilling.
9. Make sure the fan blade is on tight and ensure the set screw is securely tightened.
10. Ducted fans must always be vented to the outdoors.
11. Before servicing, switch the power off at the service panel and lock the service-disconnect to prevent power from being switched on accidentally.
12. FOR HOMES WITH A GAS OR OIL FURNACE OR APPLIANCE LOCATED IN THE SAME SPACE: The ventilator MUST be wired with a switch or other interlocking device to prevent the furnace and ventilator from operating at the same time during the heating cycle. The switch or other interlocking device MUST disconnect the vent unit from the electrical circuit power. GAF recommends that the switch (not included) be installed by a qualified person in accordance with all applicable building codes and standards.
    WARNING: To Reduce The Risk Of Fire, Electric Shock, Or Injury To Persons, Do Not Use Replacement Parts That Have Not Been Recommended By The Manufacturer (e.g., Parts Made At Home Using A 3D Printer)

TOOLS REQUIRED

• 3/8″ or Adjustable Wrench
• #2 Phillips Screwdriver
• Saw (if installation requires additional wood supports)
• Safety Eyewear
• Fall-Restraint Equipment
• Hard Hat and Other Safety Equipment
• Utility Knife
• Work Gloves
• Ladder
• Claw Hammer
• Pencil or Marker
• Tape Measure
• 1/2″ Trade-Size Cable Clamp Connector
• Type NM Electrical Cable
• Wire Nuts

Ensure Proper Intake Ventilation

Always ensure there is proper attic intake ventilation at or near the soffit areas of the roof. This is required for a balanced ventilation system and to help avoid premature ventilator motor failure. Use the chart located on the outside of the package or visit gaf.com/ventcalculator to ensure the minimum recommended intake ventilation is installed on the home. Always consult local building codes for ventilation requirements.

Determine Position

Vent behind an existing gable wall louver or install a Master Flow™ SGM20 Automatic Gable Louver (not included). The fan should be approximately 3″ (76 mm) to 4″ (102 mm) away from the exterior louver.

Attach Mounting Brackets to Unit

Carefully remove the unit and the mounting accessories kit from the carton. The fan mounting kit includes (8) bolts, (8) Nylok® nuts, and (4) mounting brackets. Take the mounting brackets (long side) and align with the two holes on the shroud. With holes aligned, take two bolts with the head on the inside of the shroud and push them through each hole. Take the Nylok® nuts and fasten them to each bolt. Repeat this process until all four mounting brackets are firmly fastened to the shroud (Figures 1a & 1b).

Mount the Unit

Place mounting brackets so enthe d is flush with the stud. For studs 16″ (40.6 cm) on center, mounting brackets are predrilled to this size. Screw or nail the unit to the framing through prepunched holes in the mounting brackets (Figure 2a). For studs over 16″ (406 mm) on center, install two nominal 2″ x 4″ (50 mm x 100 mm) wood supports, 14″ (356 mm) apart. Mount the unit to the two nominal 2″ x 4″ (50 mm x 100 mm) wood supports through the pre-punched holes in the mounting brackets (Figure 2b).

Wiring

Always disconnect the power supply before wiring the ventilator into an existing circuit. Remove the thermostat cover and mount the thermostat box to the edge of an adjacent rafter or stud using the pre-punched holes. Make sure the thermostat element opening on the back of the box isn’t covered. Each ventilator must have its own thermostat. Leave the flexible conduit with some slack and begin wiring the thermostat as shown (Figure 3). The included thermostat is adjustable from 60°F (15.5°C) to 120°F (48.8°C). The factory/recommended setting for efficient operation is 105°F (40.5°C). For select models with humidistat/thermostat control, the humidity should be set at 70%.

Note: In the unlikely event that accessories or parts are missing or this product does not operate correctly, please contact Master Flow™ Technical Services at 1-800-211-9612 or [email protected]. Do NOT return this ventilator to retailers or distributors.

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GAF Master Flow Gable Mount Power Attic Vents- FAQs