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5
P lanning T he I ns tallation
VENTING REQUIREMENTS
Determine which venting method is best for your application. Ductwork can extend either through
the wall or the roof. The length of the ductwork and the number of elbows should be kept to a mini-
mum to provide efficient performance. The size of the ductwork should be uniform. Do not install
two elbows together. Use duct tape to seal all joints in the ductwork system. Use caulking to seal
exterior wall or floor opening around the cap. Flexible ductwork is not recommended. If it is used,
each foot of flexible ductwork used is equivalent to two feet of straight metal ductwork when calculat-
ing the duct run length. Thus, a flexible elbow equals two standard elbows. Make sure there is proper
clearance within the wall or floor for exhaust duct before making cutouts. Do not cut a joist or stud
unless absolutely necessary. If a joist or stud must be cut, then a supporting frame must be
constructed.
WARNING: TO REDUCE THE RISK OF FIRE, USE ONLY METAL DUCTWORK.
ELECTRICAL REQUIREMENTS
A 120 volt, 60 Hz AC-only electrical supply is required on a separate 15 amp circuit, fused on both
sides of the line. A time-delay fuse or circuit breaker is recommended. The fuse must be sized per
local codes in accordance with the electrical rating of this unit as specified on the serial/rating plate
located inside the unit near the field wiring compartment.
THIS UNIT MUST BE CONNECTED WITH COPPER WIRE ONLY. Wire sizes must conform to the require-
ments of the National Electrical Code,ANSI/NFPA 70 -latest edition, and all local codes and ordinances.
Wire size and connections must conform with the rating of the appliance. This appliance should be
connected directly to the fuse disconnect (or circuit breaker) through flexible, armored or non-metallic
sheathed copper cable. Allow some slack in the cable so the appliance can be moved if servicing is
ever necessary. A UL Listed, 1/2" conduit connector must be provided at each end of the power supply
cable (at the appliance and at the junction box). When making the electrical connection, cut a 1 1/4"
hole in the wall. A hole cut through wood must be sanded until smooth. A hole through metal must
have a grommet.
WARNING: To reduce the risk of fire or electric shock, DO NOT use this fan with any solid state speed
control device.
CAUTION: For General Ventilating Use Only. Do Not Use To Exhaust Hazardous or Explosive
Materials and Vapors.