Use and Care Manual

7
Operating Instructions
Improperly grounded electrical
components are shock hazards.
Make sure all the components are
properly grounded to prevent
death or serious injury.
9. Make sure proper overload protection for the
motor is installed.
Wiring Installation
Install power leads into terminals opposite motor
wires.
When wiring unit with magnetic
starter, do not install power
directly to pressure switch to
avoid possible fire and property
damage.
Ensure power supply and internal wiring is adequate
according to voltage and frequency stated on motor
nameplate and starter. Voltage should not vary more
than 12% to ensure proper operation of compressor.
Single Phase Motors - No Magnetic Starter
1. Connect first power lead to 1L1.
2. Connect second power lead to 3L2.
3. Connect ground wire to existing motor ground wire.
Single Phase Motors - With Magnetic Starter
1. Connect first power lead to 1L1. Leave exist-
ing jumper wire installed. See Figure 6.
2. Connect second power lead to 3L2. Leave
existing jumper wire installed.
3. Connect ground wire to ground lug.
4. Ensure all wiring and terminals are properly
tightened.
1. Plug auto drain into 120V outlet.
2. Set timers to desired settings. See figure 4.
If drain is used for multiple units, increase
timer settings as needed.
3. Use test button to check proper operation.
Refer to maintenance section for proper care.
Electrical Safety
Be sure only trained and
authorized personnel install and
maintain this compressor in
accordance with all applicable
federal, state and local codes,
standards and regulations. Follow all NEC (National
Electric Code) standards especially those concerning
equipment grounding conductors.
1. Follow all NEC and local codes for electrical wiring.
Allow only authorized EMAX service person or cer-
tified electrician to install electrical components.
2. Put unit on dedicated circuit and make sure
no other electrical equipment is wired into it.
Failure to wire unit on independent circuit can
cause circuit overload and/or imbalance in
motor phasing. Install proper No Fuse Breaker
(NFB) according to kW output of compressor.
3. Ensure incoming service has adequate ampere
rating.
4. Ensure supply line has the same electrical char-
acteristics (voltage, cycles and phase) as the
electric motor.
5. Refer to amp load information on motor tag and
use correctly sized wiring. Be sure to consider
distance between power supply and machine.
6. Install surge protection device between power
supply and compressor motor.
7. Make sure to install properly sized breakers and
fuses.
8. The unit must be properly grounded. DO NOT
connect ground wire to air or cooling lines.
TEST
ON
0.5
0.5
2
5
10
20
30
4
6
ON SEC
OFF MIN
OFF
Figure 4: Auto Drain Feature
Not included
on all units
Drain time
Drain interval
Filter access
Clean regularly,
see Fig 13.
Manual OPEN/
CLOSE valve
Pipe to tank outlet(s)
Figure 5: Single Phase Wiring Diagram
without magnetic starter
Breaker
Power Supply
220 V
Motor
Starter
Motor
Power
1
Power
2
1
3
5
2
4
6
110V Power
Wires
Common
ground wire