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INSTALLATION INSTRUCTIONS (CONTINUED)
Installing A Shut-Off Valve
A shut-off valve should be installed on the discharge port of the tank to control the air flow out of the tank.
The valve should be located between the tank and the piping system.
Figure 4 - Shut-off Valve
Wiring
national codes.
Wiring must be installed in accordance with National Electrical Code and local codes and standards that
have been set up covering electrical apparatus and wiring. These should be consulted and local ordinances
observed. Be certain that adequate wire sizes are used, and that:
1.
Service is of adequate ampere rating.
2.
The supply line has the same electrical characteristics (voltage, cycles and phase) as the motor. Refer to
motor name plate for electrical ratings and specifications.
3.
The line wire is the proper size and that no other equipment is operated from the same line. The chart
gives minimum recommended wire sizes for compressor installations.
Make sure voltage is correct with the motor wiring.
NOTE: If using 208 volts single phase, make sure the motor name plate states it is
rated for 208 volts single phase. 230 volt single phase motors do not work on 208
volts unless they have the 208 volt rating.
HP
SPL
5.0
7.5
10.0
15.0
25.0
Recommended wire sizes may be larger than the minimum set up by local ordinances. If so, the larger
size wire should be used to prevent excessive line voltage drop. The additional wire cost is very small
compared with the cost of repairing or replacing a motor electrically "starved" by the use of supply
wires which are too small.
8
Never install a shut-off valve between the compressor pump and the tank. Personal injury and/
or equipment damage may occur. Never use reducers in discharge piping.
When creating a permanently installed system to distribute compressed air, find the
total length of the system and select pipe size from the chart. Bury underground lines
below the frost line and avoid pockets where condensation can gather and freeze.
Apply air pressure to the piping installation and make sure all joints are free from
leaks BEFORE underground lines are covered. Before putting the compressor into
service, find and repair all leaks in the piping, fittings and connections.
All wiring and electrical connections must be performed by a qualified electrician
familiar with induction motor controls. Installations must be in accordance with local and
Overheating, short circuiting and fire damage will result from inadequate wiring.
Minimum Wire Size (Use 75°C Copper Wire)
SINGLE PHASE
AMPS
230V
up to 22.0
10 AWG
8 AWG
8 AWG
N/A
N/A
N/A
THREE PHASE
208/230V
460/575V
12 AWG
14 AWG
10 AWG
12 AWG
8 AWG
12 AWG
6 AWG
10 AWG
3 AWG
8 AWG
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