Universal Speed Controller (USC) |
USC |
|
|
|
|
Description
The Price Universal Speed Controller
provides variable speed control of permanent
split capacitor (PSC) motors used in Price
terminal units.
The USC is a solid state device with integral
heat sink/mounting plate. This results in a
long life component that is easy to install.
Models
There are is a total of four models of USC.
- 115 VAC 8 amps maximum load
- 115 VAC 15 amps maximum load (large
finned heat sink)
- 277 VAC 8 amps maximum load (same
size as 115 VAC 8 amps model but with
different label)
- 277 VAC 10 amps maximum load (large
finned heat sink)
Wiring
The connection is 2-wire (no-polarity). The
USC is connected in series with one of the
motor lines. (Typically the hot.)
Setup
The air flow sensor responds to radiant
heat of the heating element which, in turn,
is influenced by the air flowing through the
heater to dissipate the heat. The patented
air flow sensor and associated electronic
|
|
Notes
When measuring the voltage output from
the speed controller you must use a TRUERMS
volt-meter. A non TRUE-RMS voltmeter
will give inaccurate readings due to
the shape of the AC waveform coming from
the electronic speed controller.
It is not recommended to change the
minimum adjust dial since running the
motor at lower speed may reduce its life due
to overheating the windings and stressing
the shaft bearings. (Low RPM prevents
lubrication of the bearings.) |