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Overload protection is provided for each motor on full voltage and Wye Delta applications. The overloads
are adjustable and are factory set based on the motor nameplate amps and the instructions located inside
the control box door. Less starter applications utilize a control relay for control of a remote mounted
motor starter (not provided with compressor package). Wye-delta starters employ three contactors which
are controlled sequentially to provide low current starting. For wye-delta starters, the motor nameplate
amps must be first multiplied by 0.577 before using the heater table.
COMPRESSOR CAPACITY CONTROL - TURN VALVE UNITS ONLY
The capacity of the compressor is controlled by the action of the turn valve and the compressor inlet
valve.
The turn valve controls compressor delivery to match demands of 40% to 100% of the compressor’s
maximum capacity. The inlet valve throttles to control compressor delivery to match demands of 0% to
40% of the compressors maximum capacity.
Example with normal setting of 100 PSIG:
Compressor Delivery
Capacity
Inlet Valve Position
Turn Valve Position
Discharge Manifold
Pressure (psi)
Full
Open
Closed
100
70%
Open
50% Open
100
40%
Open
Full Open
100
30%
Closing
Full Open
103
20%
Closing
Full Open
103
0%
Closed
Full Open
103
Summary of Contents for AirSmart EAU99T
Page 13: ...13 10 618 Page 12 Figure 1 6 PACKAGE AIR OIL FLOW DIAGRAM 202EDM797 Ref Drawing...
Page 39: ...13 10 618 Page 38 Figure 4 8 CONTROL SCHEMATIC COMPRESSOR AT FULL LOAD 206EAU797 B Ref Drawing...
Page 42: ...13 10 618 Page 41 Figure 4 11 WIRING DIAGRAM WYE DELTA 329EAU546 A Ref Drawing Page 1 of 2...
Page 43: ...13 10 618 Page 42 329EAU546 A Ref Drawing Page 2 of 2...
Page 44: ...13 10 618 Page 43 Figure 4 12 WIRING DIAGRAM WYE DELTA 330EAU546 A Ref Drawing Page 1 of 2...
Page 45: ...13 10 618 Page 44 330EAU546 A Ref Drawing Page 2 of 2...
Page 49: ...13 10 618 Page 48 Figure 5 3 FLOW DIAGRAM 210EAU797 B Ref Drawing...