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Speedaire Operating Instructions
Speedaire
Compressors
Installation (Continued)
MINIMUM PIPE SIZE FOR
COMPRESSED AIR LINE
Length of Piping System
E
N
CFM
25 ft.
50 ft
G
20
3/4 in. 3/4 in. 3/4 in. 1 in.
L
I
40
3/4
1
S
60
3/4
1
H
100
1
1
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.
WIRING
All wiring and
electrical
connections must be performed by a
qualified electrician. Installations must
be in accordance with local and national
codes.
Overheating, short
circuiting and fire
damage will result from inadequate
wiring.
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.
3. The line wire is the proper size and
that no other equipment is operated
from the same line. The chart gives
Two-Stage Air
®
minimum recommended wire sizes
for compressor installations.
MINIMUM WIRE SIZE
USE 75°C COPPER WIRE
Single
100
250
Phase
ft.
ft.
HP
230V
5.0
8 AWG 12 AWG
1
1
7.5
8 AWG 10 AWG
1
1
10.0
N/A
1
1-1/4
15.0
N/A
25.0
N/A
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.
GROUNDING
Improperly grounded
electrical components are
shock hazards. Make sure all
the components are properly grounded
to prevent death or serious injury.
This product must be grounded.
Grounding reduces the risk of electrical
shock by providing an escape wire
for the electric current if short circuit
occurs. This product must be installed
and operated with a power cord or
cable that has a grounding wire.
MOTOR HOOKUP AND STARTER
INSTALLATION
Branch circuit protection must be
provided as specified in the United
States National Electrical Code, Chapter
2, "Wiring Design and Protection."
Three Phase
Article 210, using the applicable article
208/230V
460/575V
"For Motors and Motor Controllers,"
(Article 430, Table 430-1 52).
14 AWG
IMPORTANT: Overload protection
12 AWG
is required for all motors. Certain
8 AWG
12 AWG
motors have this protection built-in.
6 AWG
10 AWG
To determine if a motor has built-in
3 AWG
8 AWG
overload protection, refer to the frame
size on the motor nameplate.
Motors with frame size R56HZ, Y56Y
or L143T include built-in overload
protection. No additional protection is
required. Use Figure 3 wiring diagram.
Figure 3 - For Motor Frame Sizes
R56HZ, Y56Y or L143T. Refer to Motor
Nameplate
Motors with frame sizes 184T, 215T,
254T or 284T DO NOT have built-
in overload protection. A magnetic
starter is required. Use Figure 4 wiring
diagram.
To change to the alternate voltage
on three phase motors with 230/460
ratings:
4
4MU10A, 3VB60
Line
Ground
Ground
L3 (for 3 phse wiring only)
L2
L1
Single Phase
Motor
Wiring Diagram
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