Page 2 | RDF Installation Supplement
Caution
FOR GENERAL VENTILATING USE ONLY. DO NOT USE TO EXHAUST
HAZARDOUS OR EXPLOSIVE MATERIALS AND VAPORS.
Warning
TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO
PERSONS, OBSERVE THE FOLLOWING:
1. Use this unit only in the manner intended by the manufacturer.
If you have any questions, contact the manufacturer.
2. Before servicing or cleaning the unit, switch power off at service
panel and lock service panel to prevent power from being
switched on accidentally. When the service disconnecting
means cannot be locked, securely fasten a prominent warning
device, such as a tag, to the service panel.
In addition to the following manufacturer’s instructions, it is
necessary to comply with federal, state, and local government
codes. Your purchase of this ALDES North America system
represents an investment in the health and comfort of occupants,
as well as an investment in the protection of the building from the
damaging effects of excessive indoor humidity.
This model of centrifugal fan is designed for multiple purposes. It
may be used as an in-line rectangular duct fan (Model RDF) or a
manifolded, multi-port fan for multiple exhaust or supply points.
It may be installed in a remote location such as an attic space,
mechanical room, above a drop ceiling, in a closet or in a laundry
room, to provide quiet exhaust of stale, humid, or otherwise
polluted air from bathrooms, kitchens, laundry rooms, or storage
rooms via exhaust grilles and ducting to the centrally located
fan, which is ducted to the outdoors. With small return grilles
in bedrooms and other areas, and one duct connection to the
outdoors, such as the BVS models, it may also be used as a supply
ventilator or recirculating central ventilator for the introduction
of outdoor air, raising the temperature of the fresh air by
mixing with recirculated indoor air. When used with adjustable
balancing grilles or ALDES Constant Airflow Regulators (CAR) and
compatible roof/wall caps, ducting, etc., the fan is the heart of a
complete pre-engineered ventilation system.
System Design
Satisfactory performance of a central ventilation system requires
the proper integration of all the components:
•
Fan selection for airflow, pressure and acoustic properties,
vibration characteristics and mounting method, and mode of
operation (continuous, manually or automatically controlled)
•
Proper duct design for friction losses, with compatible supply
or exhaust grilles (airflow and acoustic properties of the supply/
exhaust grilles), and compatible wall/roof caps
•
Method of balancing airflows of multi-point ventilation systems
•
Consideration for potential condensation in the ducting or fan
housing (installation in an unheated space)
Duct Connections
Ducting may be flexible or rigid, depending on local codes. If
permitted by code, insulated flexible ducting is recommended.
To limit fan noise, at least 8 feet of insulated flexible duct shall
be installed between the fan and grille(s). All flexible duct
connections shall be secured with clamps or wire ties and
sealed with mastic or code-approved duct tape. All rigid ducts
are to be sealed on both ends and along the longitudinal seams
with mastic or code-approved duct tape.
Ducting should conform to NFPA 90A and meet the requirements
of UL as a Class 0 or Class 1 duct to specification UL 181, Standard
for Factory-Made Air Ducts and Duct Connectors.
Installation Warning
TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY
TO PERSONS, OBSERVE THE FOLLOWING:
1.
Installation work and electrical wiring must be done by
qualified person(s) in accordance with all applicable codes
and standards, including fire-rated construction.
2.
Sufficient air is needed for proper combustion and
exhausting of gases through the flue (chimney) of fuel-
burning equipment to prevent backdrafting. Follow the
heating equipment manufacturer’s guidelines and safety
standards such as those published by the National Fire
Protection Association (NFPA), the American Society for
Heating, Refrigeration and Air Conditioning Engineers
(ASHRAE), and the local code authorities.
3.
When cutting or drilling into wall or ceiling, do not damage
electrical wiring and other hidden utilities.
4.
When used as exhaust fans, ducted fans must always be
vented to the outdoors.
5.
If this unit is to be installed over a tub or shower, it must
be marked as appropriate for the application and be
connected to a GFCI- (Ground Fault Circuit Interrupter)
protected branch circuit.
6.
NEVER place a switch where it can be reached from a tub
or shower.
MAINTENANCE
MONTHLY:
Inspect and clean the exhaust grilles and
filters, if so equipped.
ANNUALLY:
To ensure the maximum efficiency of the
fan unit, it is recommended to clean the inside of the
fan box as well as the blower wheel.
