Section 6
OPERATION
30
BLOWDOWN SOLENOID VALVE
BLOWDOWN VALVE
EMERGENCY STOP SWITCH
Opens when a demand for an unload/shutdown condition
exists. When valve is opened, it will supply air to the blow-
down valve.
Vents sump pressure to the atmosphere during unload/shut-
down conditions.
Pushing in this switch, found adjacent to the Supervisor, cuts
all AC outputs from the latter and de-energizes the starter. A
fault message (E STOP) is displayed by the Supervisor until
the button is pulled out and the
pad is depressed.
6.2 PURPOSE OF CONTROLS (CONTINUED)
CONTROL OR INDICATION
PURPOSE
6.3 INITIAL START-UP PROCEDURE
Do Not attempt to start compressor more than
once over a period of thirty minutes.
The following procedure should be used to make
the initial start-up of the compressor.
1. Be sure that all preparations and checks
described in the Installation Section have been
made.
2. Read the preceding pages of this manual thor-
oughly.
3. Jog motor to check for correct rotation of fan
4. Start the compressor in the desired operating
mode or .
5. Slowly open the shut-off valve to the service line.
6. Check for possible leaks in piping.
7. Slowly close the shut-off valve to assure proper
nameplate pressure unload setting is correct.
The compressor will unload at nameplate pres-
sure. If adjustments are necessary, consult
Differential Pressure Regulator Adjustment
in
Section 7( Maintenance) of this manual.
8. Observe the operating temperature. Refer to
compressor operator’s manual for acceptable
operating range. If temperature exceeds this
range, the cooling system and installation envi-
ronment should be checked.
9. Open shut-off valve to the service line.
10. Reinspect the compressor for temperature and
leaks the following day.
6.4 SUBSEQUENT START-UP PROCEDURE
Do Not attempt to start compressor more than
once over a period of thirty minutes.
On subsequent start-ups, check that the proper
level is visible in the fluid sight glass and simply
press the START
or AUTO MODE
button.
When the compressor is running, observe the
instrument panel and maintenance indicators.
6.5 SHUTDOWN PROCEDURE
To shut the compressor down, simply press the
STOP
button.
Summary of Contents for LS-20T
Page 6: ......
Page 20: ...Section 2 DESCRIPTION 14 Figure 2 4A Control System Diagram Functional Components...
Page 21: ...Section 2 DESCRIPTION 15 Figure 2 4B Control System Diagram START...
Page 22: ...Section 2 DESCRIPTION 16 Figure 2 4C Control System Diagram MODULATION...
Page 23: ...Section 2 DESCRIPTION 17 Figure 2 4D Control System Diagram FULL LOAD...
Page 24: ...Section 2 DESCRIPTION 18 Figure 2 4E Control System Diagram UNLOAD...
Page 26: ...NOTES 20...
Page 30: ...NOTES 24...
Page 34: ...NOTES 28...
Page 42: ...NOTES 36...
Page 46: ...NOTES 40...
Page 49: ...NOTES 43...
Page 50: ...Section 9 ILLUSTRATIONS AND PARTS LIST 44 02250137 909R00 9 3 MOTOR FRAME COMPRESSOR AND PARTS...
Page 52: ...Section 9 ILLUSTRATIONS AND PARTS LIST 46 02250137 907R03 9 4 AIR INLET SYSTEM...
Page 54: ...Section 9 ILLUSTRATIONS AND PARTS LIST 48 02250137 907R03 9 4 AIR INLET SYSTEM...
Page 56: ...Section 9 ILLUSTRATIONS AND PARTS LIST 50 02250138 702R00 9 5 AIR INLET SUB ASSEMBLY...
Page 58: ...Section 9 ILLUSTRATIONS AND PARTS LIST 52 02250137 908R00 9 6 WATER COOLING SYSTEM...
Page 60: ...Section 9 ILLUSTRATIONS AND PARTS LIST 54 02250137 910R01 9 7 AIR PIPING SYTEM...
Page 62: ...Section 9 ILLUSTRATIONS AND PARTS LIST 56 02250137 912R01 9 8 FLUID PIPING SYSTEM...
Page 64: ...Section 9 ILLUSTRATIONS AND PARTS LIST 58 02250139 798R00 9 9 WATER PIPING SYSTEM...
Page 66: ...Section 9 ILLUSTRATIONS AND PARTS LIST 60 02250137 911R01 9 10 DISCHARGE SYSTEM...
Page 68: ...Section 9 ILLUSTRATIONS AND PARTS LIST 62 02250137 911R01 9 10 DISCHARGE SYSTEM...
Page 70: ...Section 9 ILLUSTRATIONS AND PARTS LIST 64 02250137 911R01 9 10 DISCHARGE SYSTEM...
Page 72: ...Section 9 ILLUSTRATIONS AND PARTS LIST 66 02250137 914R02 9 11 CONTROL START SYSTEM...
Page 74: ...Section 9 ILLUSTRATIONS AND PARTS LIST 68 02250137 914R02 9 11 CONTROL START SYSTEM...
Page 76: ...Section 9 ILLUSTRATIONS AND PARTS LIST 70 9 12 CONTROL PANEL 02250138 633R00...
Page 78: ...Section 9 ILLUSTRATIONS AND PARTS LIST 72 9 13 ENCLOSURE 02250138 672R00...
Page 80: ...Section 9 ILLUSTRATIONS AND PARTS LIST 74 9 13 ENCLOSURE 02250138 672R00...
Page 82: ...Section 9 ILLUSTRATIONS AND PARTS LIST 76 9 14 DECAL GROUP...
Page 84: ...Section 9 ILLUSTRATIONS AND PARTS LIST 78 9 14 DECAL GROUP...
Page 86: ...Section 9 ILLUSTRATIONS AND PARTS LIST 80 9 14 DECAL GROUP...
Page 88: ...Section 9 ILLUSTRATIONS AND PARTS LIST 82 9 15 DECAL LOCATION OPEN MODEL...
Page 90: ...Section 9 ILLUSTRATIONS AND PARTS LIST 84 9 16 DECAL LOCATION ENCLOSED MODEL...
Page 92: ...Section 9 ILLUSTRATIONS AND PARTS LIST 86 9 17 DECAL LOCATION CONTROL BOX...
Page 94: ...Section 9 ILLUSTRATIONS AND PARTS LIST 88 9 18 WIRING DIAGRAM LS20T 525 PSIG 02250137 917R01...
Page 95: ...NOTES 89...