3
Plumbing
To prevent air flow restriction, use pipe and fittings
that are same size or larger than unit’s threaded ports.
NOTE: Be sure to connect intake and exhaust plumbing
to correct inlet and outlet ports.
Accessories
Filters and mufflers are supplied on some models. Check
periodically and replace when necessary. Consult a Gast
Representative for filter recommendations. For best
results, install relief valves and gauges at inlet or outlet, or
both, to monitor performance.
Electric Motor Control
Motor must be protected against short circuit, overload
and excessive temperature rise. Fuses, motor-protective
switches and thermal-protective switches provide
necessary protection in these circumstances. Fuses only
serve as a short circuit protection of motor (wiring
fault). Fuses in the incoming line should be chosen so as
to be able to withstand the starting current of the motor,
not as a protection against overload.
Motor starters, incorporating thermal-magnetic overload
or circuit breakers protect motor from overload or
reduced voltage conditions.
Selection of correct overload setting is required to
provide best possible protection. Refer to motor starter
manufacturer’s recommendations.
OPERATION
m
WARNING Solid or liquid material exiting unit can
cause eye or skin damage. Keep away
from air stream.
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WARNING Disconnect power before servicing
to
avoid electric shock or accidental start-
up. The motor may be thermally pro-
tected and will restart automatically when
it cools if the thermal protection switch is
tripped.
m
WARNING Do not operate without grille(s), if pro-
vided, in place. Failure to do so could
result in severe personal injury.
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WARNING Head surface(s) can be very hot depend-
ing on unit duty and speed. Do not touch
these parts during operation.
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CAUTION Do not operate units above recom-
mended pressures or vacuum duties.
This will overheat unit.
For a grounded, cord-connected product rated less than 15
amperes and intended for use on a nominal 120 volt
supply circuit:
This product is for use on a nominal 120-volt circuit and has
a grounding plug that looks like the plug illustrated in Figure
1. Make sure that the product is connected to an outlet having
the same configuration as the plug. No adapter should be used
with this product
Figure 1
For all other grounded, cord-connected products:
This product is for use on a circuit having a nominal rating
more than I20 volts (or 220-240 volts) …and is
factory-equipped with a specific electric cord and plug to
permit connection to a proper electric circuit. Make sure that
the product is connected to an outlet having the same
configuration as the plug. No adapter should be used with this
product if the product must be reconnected for use on a
different type of electric circuit, the reconnection should be
made by qualified service personnel.
For a permanently connected product:
This product should be connected to a grounded, metallic,
permanent wiring system, or an equipment-grounding
terminal or lead on the product
Extension Cords:
Use only a 3-wire extension cord that has a 3-blade grounding
plug, and a 3-slot receptacle that will accept the plug on the
product Make sure your extension cord is in good condition.
When using an extension cord, be sure to use one heavy,
enough to carry the current your product will draw. For
lengths less than 25 feet, No.18 AWG extension cords should
be used. An undersized cord will cause a drop in line voltage
resulting in loss of power and overheating.
Exception: A 2-conductor or 3-conductor extension cord may
be used for a double-insulated or 2-wire product.
Refer to wiring tag supplied with unit, for diagram
and capacitor option. For any DC unit - red lead goes
to positive side of power source.