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CAUTION
Electric power always exists inside the pressure switch when there is electric
power at the compressor package. Either a qualified electrician should make the
pressure adjustments or the electric power supply should be disconnected and
locked out before making any adjustment.
NEVER exceed the designed pressure for the system or overload the motor
beyond its service factor.
FAILURE TO HEED THESE WARNINGS MAY RESULT IN SERIOUS INJURY
OR DEATH, PROPERTY DAMAGE AND/OR MECHANICAL FAILURE
CAUTION
Relieve compressor and system air pressure by opening the appropriate manual
relief valve prior to servicing. Failure to relieve all system pressure may result in
severe personal injury, death and property damage.
Electrical
Before installation, the electrical supply should be checked for adequate
wire size and transformer capacity. During installation a suitable fused or
circuit breaker disconnect switch should be provided. Where a 3 phase
motor is used to drive a compressor, any unreasonable voltage unbalance
between the legs must be eliminated and any low voltage corrected to
prevent excessive current draw. Compressors must be equipped with a
properly wired magnetic motor starter or a pressure switch rated to carry
the full motor current load. The coil which engages and disengages the
contact points in the motor starter is controlled by the pressure switch.
Never attempt to bypass the pressure switch or adjust it past the factory
set pressure range. Improper installation of the electrical system can
cause the motor to overheat or a short circuit to occur.
Pressure switch
The pressure switch is automatic in operation and is adjusted to start and
stop the unit at the minimum and maximum desired air receiver pressure
by cutting in and out the power to the electric motor. On some models,
the pressure switch incorporates a release valve, which releases air
between the check valve located in the receiver and discharge valve in
the head of the compressor.
DANGER
The installation, wiring, and all electrical controls must be in accordance
with ANSI C1 National Electric Code, ANSE C2 National Electric Safety Code,
state and local codes. All electrical work should be performed by a qualified
electrician. Failure to abide by the national, state and local codes may result in
physical and/or property damage.
guidelines
