Section 6
OPERATION
28
6.3 INITIAL START-UP PROCEDURE
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
(refer to Section
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
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.
Do Not attempt to start compressor more than
once over a period of thirty minutes.
Do Not attempt to start compressor more than
once over a period of thirty minutes.
6.2 PURPOSE OF CONTROLS (CONTINUED)
CONTROL OR INDICATION
PURPOSE
PRESSURE REGULATOR (REFER-
ENCE)
Opens a pressure line between the sump and the inlet poppet
valve after initial startup. This pressure overcomes the internal
spring load, allowing the inlet poppet valve the ability to modulate
as required by the service line.
DOWNSTREAM INLET PRESSURE
REGULATOR
Maintains a supply pressure of 100 psi (6.9 bar) to inlet control
valve during modulation modes (protects the inlet control valve).
STARTUP SOLENOID VALVE
Assures no flow to the reference regulator during startup for
approximately 7-seconds. After the timer times out, this valve
opens to allow air to flow to the reference pressure regulator.
BLOWDOWN SOLENOID VALVE
Opens when a demand for an unload/shutdown condition
exists. When valve is opened, it will supply air to the blow-down
valve.
BLOWDOWN VALVE
Vents sump pressure to the atmosphere during unload/shutdown
conditions.
EMERGENCY STOP SWITCH
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.
Summary of Contents for LS20T 1100 CFM
Page 18: ...Section 2 DESCRIPTION 12 Figure 2 3B Control System Diagram START...
Page 19: ...Section 2 DESCRIPTION 13 Figure 2 3C Control System Diagram MODULATION...
Page 20: ...Section 2 DESCRIPTION 14 Figure 2 3D Control System Diagram FULL LOAD...
Page 21: ...Section 2 DESCRIPTION 15 Figure 2 3E Control System Diagram UNLOAD...
Page 44: ...NOTES 38...
Page 104: ...Section 9 ILLUSTRATIONS AND PARTS LIST 98 02250146 367R00 9 19 CONTROL START SYSTEM...
Page 106: ...Section 9 ILLUSTRATIONS AND PARTS LIST 100 02250146 367R00 9 19 CONTROL START SYSTEM...
Page 108: ...Section 9 ILLUSTRATIONS AND PARTS LIST 102 02250138 633R00 9 20 CONTROL PANEL...
Page 110: ...Section 9 ILLUSTRATIONS AND PARTS LIST 104 02250139 119R01 9 21 ENCLOSURE...
Page 112: ...Section 9 ILLUSTRATIONS AND PARTS LIST 106 02250139 119R01 9 21 ENCLOSURE...
Page 114: ...Section 9 ILLUSTRATIONS AND PARTS LIST 108 9 22 DECAL GROUP...
Page 116: ...Section 9 ILLUSTRATIONS AND PARTS LIST 110 9 22 DECAL GROUP...
Page 118: ...Section 9 ILLUSTRATIONS AND PARTS LIST 112 9 22 DECAL GROUP...
Page 120: ...Section 9 ILLUSTRATIONS AND PARTS LIST 114 9 23 DECAL LOCATIONS OPEN AIR COOLED...
Page 122: ...Section 9 ILLUSTRATIONS AND PARTS LIST 116 9 24 DECAL LOCATIONS OPEN WATER COOLED...
Page 124: ...Section 9 ILLUSTRATIONS AND PARTS LIST 118 9 25 DECAL LOCATIONS REMOTE COOLER...
Page 126: ...Section 9 ILLUSTRATIONS AND PARTS LIST 120 9 26 DECAL LOCATIONS CONTROL BOX...
Page 128: ...Section 9 ILLUSTRATIONS AND PARTS LIST 122 9 27 ENCLOSURE DECALS...
Page 145: ...NOTES 139...
