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Cast Iron Series
Speedaire Operating Instructions
protector must be rated for at least the
amperage and voltage indicated on the
motor nameplate, and meet all electrical
codes for this minimum. Use a slow blow
fuse type T or a circuit breaker.
Installation (Continued)
Overheating, short-
circuiting and fire
damage will result from inadequate
wiring.
When the compressor unit is connected
to the electrical supply by permanent
wiring, an approved disconnect device
must be installed in the circuit.
Do not use the pressure switch as a
disconnect while performing service on
the compressor unit. A circuit break
may be used as a disconnect if it is visible
from the compressor and can be locked
in the open or off position.
If the motor does not have built-in
protection, an overload device must be
installed in the supply circuit. Consult
the approriate codes for acceptable
thermal protection. Some 3 Phase motor
installations will require a magnetic
starter as shown in Figure 3.
NOTE:
Terminal configuration may vary.
Check the pressure switch markings on
your unit!
Operation
RECOMMENDED bREAk-IN PERIOD
The compressor should be run
continuously for one hour to allow
proper seating of the piston rings.
1. Open drain cock on the tank and
run the compressor unloaded for 60
minutes.
2. Turn off the compressor and close
drain cock. The compressor is now
ready for use.
START-uP (SEE FIGuRE 2)
This compressor
pump must be filled
with oil before startup. See Lubrication
section.
Do not attach air
tools to open end of
the hose until start-up is completed and
the unit checks OK.
1. Remove the dipstick breather and
fill pump to the proper oil level. See
Lubrication section.
2. Turn pressure switch lever or knob to
OFF position and plug in power cord
(See Figure 4). Turn off disconnect
switch if there is no lever or knob on
the pressure switch.
3. Turn pressure switch lever or knob to
AUTO position and run unit for 30
minutes to break in the pump parts
(See Figure 4).
4. After use, turn pressure switch lever
or knob to the Off position.
5. If compressor is not used for a long
time period, bleed air from line
and use drain cock to drain water
from the tank. Then, follow the
maintenance schedule.
NOTE:
Electric models are equipped
with a pressure switch that automatically
turns the motor OFF when the tank
pressure reaches a preset level. After
L1
L2
PRESSURE
SWITCH
THERMAL
UNITS (3)
L3
T2
FUSED BREAKER
OR DISCONNECT
X2
MOTOR
OVER-
LOAD
COIL
T3
T1
L1
L2
240V
GROUND
PRESSURE
SWITCH
LINE
M
MOTOR
Figure 3 - Single and 3 Phase Wiring Diagrams
AU
TO / OFF
Figure 4
Off
Auto
