Product Overview

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It’s Still Cooling Season –
But It’s Not Too Early To
Think About Wintertime
Draft Inducer Needs
Definite Purpose (DP) Contactors for use in heating or air-conditioning
applications (or where suitable), are supplied in two common forms of
termination: screw termination for 30 Amp Full Load and under, and
aluminum compression lugs for 40 Amp Full Load.
Both 30 Amp and under and 40 Amp contactors are supplied with 4-x
0.032" Quick Connection terminals (Quad QC). DP Contactors must be
properly installed to manufacturer’s specifications and local electrical and
building code requirements.
The screw and compression terminals will accept both stranded and solid
wire in gauges from #14 AWG to #4 AWG. The wire may be made of either
copper or aluminum. (When using aluminum wire, follow wire manufacturer
recommendations for electrical join treatment.) Tightening torque for screw
termination is to be a minimum of 22 lb.-in., and should not exceed 35 lb.-in.
Tightening torque for compression lug terminals must be a minimum of 40
lb.-in., and should not exceed 55 lb.-in.
Proper tightening of the contactor power termination insures safe
mechanical retention and proper electrical service. Terminals not sufficiently
tightened can cause the termination to become very hot under full load
conditions. If the termination becomes loose in operation due to vibration,
movement or other event, the bare wire can fall from the terminal and cause
a dangerous condition.
Tightening the termination to the necessary torque may require
mechanical assistance for the average driver. If no measuring instrument
for torque is available, the installer must use good judgment and the best
“feel” for the tightness of the screw. It is good practice to tighten the screw
or lug to a comfortable level, wait for a short period, and then tighten slightly
more. The materials used in electrical wire are soft and can be compressed
(squeezed) easily. The second effort at tightening allows the wire to settle
and form to the new shape to which it has been compressed. The second
tightening insures the wire is secure.
It may still be the height of summer,
but as those of us in the industry know,
it’s not too early to start planning for
your stocking needs for the coming
winter months.
Fasco leads the industry in direct
replacement draft inducers, with a
huge selection from which to choose.
You’ll find that we have models for
all the major brands, including
Lennox, York, Rheem, Trane, Nordyne,
Goodman, ICP and more. And
remember: always insist on providing
a direct replacement when changing
out draft inducers on furnaces.
It’s extremely important to use a
direct replacement to ensure the
safety and efficiency of the unit.
A direct replacement maintains the
integrity of the furnace’s condensate
management system and assures
proper operation of the safety
pressure switch.
To see our complete line of
direct replacement draft inducers,
just see your new Fasco Stock
Replacement Catalog #44 or visit
us online at fasco.com. If you have
any questions, just call your Fasco
Sales Representative or call our
Customer Service Department
at 1-800-325-8313.
Technical Tips
DP Contactor Terminations
Fasco 2 Pole 30 Amp Screw Terminal Fasco 2 Pole 40 Amp Lug Terminal