4
CONTENTS (cont)
Page
Checking Pressure Transducers
. . . . . . . . . . . . . . . . . 77
• COOLER CONDENSER PRESSURE TRANSDUCER
AND WATERSIDE FLOW DEVICE CALIBRATION
• TRANSDUCER REPLACEMENT
Control Algorithms Checkout Procedure
. . . . . . . . 78
Control Test
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Control Modules
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
• RED LED (Labeled as STAT)
• GREEN LED (Labeled as COM)
Notes on Module Operation
. . . . . . . . . . . . . . . . . . . . . 88
Chiller Control Module (CCM)
. . . . . . . . . . . . . . . . . . . 89
• INPUTS
• OUTPUTS
Integrated Starter Module (ISM)
. . . . . . . . . . . . . . . . . 89
• INPUTS
• OUTPUTS
Replacing Defective Processor Modules
. . . . . . . . 89
•INSTALLATION
Solid-State Starters
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
• TESTING SILICON CONTROL RECTIFIERS IN
BENSHAW, INC., SOLID-STATE STARTERS
• SCR REMOVAL/INSTALLATION
Physical Data
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
INDEX
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
INITIAL START-UP CHECKLIST FOR
23XL HERMETIC SCREW
LIQUID CHILLER
. . . . . . . . . . . . . . . . . . . .CL-1 to CL-12
INTRODUCTION
Prior to initial start-up of the 23XL chiller, those involved in
the start-up, operation, and maintenance should be thoroughly
familiar with these instructions and other necessary job data.
This book is outlined to familiarize those involved in the start-
up, operation and maintenance of the unit with the control sys-
tem before performing start-up procedures. Procedures in this
manual are arranged in the sequence required for proper chiller
start-up and operation.
This unit uses a microprocessor control system. Do not
short or jumper between terminations on circuit boards or
modules. Control or board failure may result.
Be aware of electrostatic discharge (static electricity) when
handling or making contact with circuit boards or module
connections. Always touch a chassis (grounded) part to dis-
sipate body electrostatic charge before working inside con-
trol center.
Use extreme care when handling tools near circuit boards
and when connecting or disconnecting terminal plugs.
Circuit boards can be damaged easily. Always hold boards
by the edges, and avoid touching components and
connections.
This equipment uses, and can radiate, radio frequency
energy. If not installed and used in accordance with the
instruction manual, it may interfere with radio communica-
tions. This equipment has been tested and found to comply
with the limits for a Class A computing device pursuant to
Subpart J of Part 15 of FCC Rules, which are designed to
provide reasonable protection against such interference
when operated in a commercial environment. Operation of
this equipment in a residential area is likely to cause inter-
ference, in which case the user, at his own expense, will be
required to take whatever measures may be required to cor-
rect the interference.
Always store and transport replacement or defective boards
in an anti-static shipping bag.
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