Instructions / Assembly
1.800.643.5596 • Lomanco, Inc. • lomanco.com
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INSTALLATION
1. Determine approximately where on
your roof you will place your Power
Ventilator.
• At the highest point in your
attic or air space. Best if
centered on roof length, and
less conspicuous if placed on
side away from street.
• IMPORTANT: Keep the highest
part of the dome lower than
the ridge line to ensure that
the dome's edge is NOT above
ridge line. (Typically, the center
of the vent should be about 24
inches down from the ridge.)
• Establish your position with
accuracy (because you will
want to duplicate it inside your
attic) by measuring down from
the ridge and over from the
roof edge.
2. Working now from the inside,
mark your planned opening (as
you established position when on
roof) and relocate your position to
be centered between two rafters.
Drive a nail into the roof so that
it can be easily found when you
return to the roof. Before you return
to the roof, be sure that you have:
(a) string or compass, (b) drill and drill
bit, (c) keyhole or electric jig (saber)
saw with a sharp coarse blade, (d)
ventilator and base, (e) roong nails
and hammer, and (f) roong cement
and applicator.
3. Using the nail driven from the inside
as center, scribe a 14” diameter circle
using string or compass. Care should
be taken not to make the hole too
large.
4. Drill a starting hole for sawing inside
the scribed circle.
5. Starting in the drilled hole, cut circular
opening, following the scribed line.
Use either keyhole or an electric jig
(saber) saw with a sharp coarse blade
to cut shingles and roof boards at
one time. If you do not have a coarse
blade, cut away shingles inside the
circle with utility knife before cutting
roof boards.
6. Carefully remove roong nails from
top row of shingles so that the
ashing of the ventilator will slide
under top row.
Slide ventilator carefully into place
with arrow pointing up, letting the
combination control hang down into
opening. Fasten the aluminum base
to roof boards with roong nails.
Keep heads of nails under shingles
wherever possible.
7. Finish the exterior mounting by
sealing all seams and nails with
roong cement. Use cement also
to fasten down loose edges of
shingles. Return to the attic. You
now have to mount the combination
control box and connect the wiring.
WARNING —TO REDUCE THE RISK OF FIRE,
ELECTRIC SHOCK, OR INJURY TO
PERSONS, OBSERVE THE FOLLOWING:
A. Use this unit only in the manner intended by the manufacturer.
If you have any questions, contact the manufacturer.
B. Before servicing or cleaning unit, switch power off at service
panel and lock service panel to prevent power from being
switched on accidentally. When the service panel cannot be
locked, securely fasten a prominent warning device, such as
a tag to the service panel.
C. Installation work and electrical wiring must be done by
qualied person(s) in accordance with all applicable codes
and standards, including re-rated construction.
D. Sufcient air is needed for proper combustion and exhausting
of gases through the ue (chimney) of fuel-burning equipment
to prevent back drafting. Follow the heating equipment
manufacturer’s guide lines 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.
E. When cutting or drilling into wall or ceiling, do not damage
electrical wiring or other hidden utilities.
F. Ducted fans must always be vented to the outdoors.
G. If this unit is to be installed over a tub or shower, it must be
marked as appropriate for the application.
H. NEVER - place a switch where it can be reached from a tub
or a shower.
CAUTION - For general ventilating use only. Do not use to
exhaust hazardous or explosive materials and vapors.
CAUTION- This unit has an unguarded fan blade. Do not
use in locations readily accessible to people or animals. This
fan is intended for use facing an unoccupied space only.
Be sure your fan is properly installed. Your fan is designed to
operate on 120 VAC 60 Hz.
Sharp edges are exposed during installation. Use gloves and
other safety equipment to avoid accidents.
WARNING - To reduce the risk of re or electric shock, do
not use this fan with any solid state speed control.
IMPORTANT
With the power vent installed, at least 768 square inches of
inlet area must be provided.
OPERATION
Your ventilator will operate automatically as needed. The
adjustable thermostat has been set at the factory to come
on at 100°F., off at 85°F. The motor has been permanently
lubricated and does not require additional lubrication.
Condensation occurs when air touches a surface whose
temperature is at the dew point of the air (100% relative
humidity). For automatic humidistat operation, set the
humidistat at 70%-80%. This will activate the power ventilator
before the air reaches 100% relative humidity. If the area
remains too humid of if mold and/or mildew is present, set
the humidistat to 40%. If the fan run excessively and the area
is not over humid, increase the setting of the humidistat to a
higher percentage rate.
LomanCool
TM
2000TH
Power Vent Installation Instructions
20600_0717