CONTENTS
Page
SAFETY CONSIDERATIONS
. . . . . . . . . . . . . . . . . . . 1
INTRODUCTION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
MACHINE DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . 3-9
Basic Absorption Cycle
. . . . . . . . . . . . . . . . . . . . . . 3
Double-Effect Reconcentration
. . . . . . . . . . . . . . . . 3
Machine Construction
. . . . . . . . . . . . . . . . . . . . . . . . 3
Flow Circuits
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Equilibrium Diagram and Chiller
Solution Cycle
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
• PLOTTING THE SOLUTION CYCLE
Purge System
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
MACHINE CONTROLS
. . . . . . . . . . . . . . . . . . . . . 10-19
Start-Stop Systems
. . . . . . . . . . . . . . . . . . . . . . . . . 10
• SEMI-AUTOMATIC START-STOP
• FULL AUTOMATIC START-STOP
Control Wiring
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Control Panel
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Typical Control Sequence, Normal Start
. . . . . . 14
Typical Control Sequence, Normal Stop
. . . . . . 16
Typical Control Sequence,
Abnormal Stop
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Capacity Control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
• CONTROLLER
High Concentration Limit
. . . . . . . . . . . . . . . . . . . . 19
Low Concentration Limit
. . . . . . . . . . . . . . . . . . . . 19
High-Stage Generator Level Limit
. . . . . . . . . . . . 19
BEFORE INITIAL START-UP
. . . . . . . . . . . . . . . . 19-22
Job Data and Tools Required
. . . . . . . . . . . . . . . . 19
Inspect Field Piping
. . . . . . . . . . . . . . . . . . . . . . . . . 20
Inspect Field Wiring
. . . . . . . . . . . . . . . . . . . . . . . . . 20
Standing Vacuum Test
. . . . . . . . . . . . . . . . . . . . . . 20
• LONG INTERVAL TEST
• SHORT INTERVAL TEST
Machine Evacuation
. . . . . . . . . . . . . . . . . . . . . . . . . 21
Solution and Refrigerant Charging
. . . . . . . . . . . 21
• HANDLING LITHIUM BROMIDE SOLUTION
• CHARGING SOLUTION
• CHARGING FOR CONDITIONS OTHER
THAN NOMINAL
• INITIAL REFRIGERANT CHARGING
INITIAL CONTROL CHECKOUT
AND ADJUSTMENT
. . . . . . . . . . . . . . . . . . . . . . 22-24
Preparation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Energize Control Circuit
. . . . . . . . . . . . . . . . . . . . . 22
Check Solution and Refrigerant
Pump Starters
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Check Pump Starter Overloads
. . . . . . . . . . . . . . 22
Check Low-Temperature Cutout
. . . . . . . . . . . . . . 22
Check Cycle-Guard™ Valve
. . . . . . . . . . . . . . . . . . 23
Check Solution Thermoswitch
. . . . . . . . . . . . . . . 23
Check High-Stage Generator
Temperature Thermoswitch
. . . . . . . . . . . . . . . . 23
Check High-Stage Generator
Pressure Switch
. . . . . . . . . . . . . . . . . . . . . . . . . . 23
Check Rotation of Solution and
Refrigerant Pumps
. . . . . . . . . . . . . . . . . . . . . . . . 23
Check Capacity Control Operation
. . . . . . . . . . . 23
Completion
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
INITIAL START-UP
. . . . . . . . . . . . . . . . . . . . . . . . . 25-27
Preliminary Check
. . . . . . . . . . . . . . . . . . . . . . . . . . 25
• PREPARATION
Page
Final Adjustment of Capacity Controls
. . . . . . . 25
• WITH THE MANUAL PROCEDURE
• WITH THE AUTOMATIC PROCEDURE
Final Refrigerant Charge Adjustment
. . . . . . . . . 25
Check Machine Shutdown
. . . . . . . . . . . . . . . . . . . 27
Check Low-Evaporator Level Operation
. . . . . . 27
Determine Noncondensable
Accumulation Rate
. . . . . . . . . . . . . . . . . . . . . . . . 27
OPERATING INSTRUCTIONS
. . . . . . . . . . . . . . . 27-30
Operator Duties
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Before Starting Machine
. . . . . . . . . . . . . . . . . . . . . 27
Start Machine
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Start-Up After Limited Shutdown
. . . . . . . . . . . . . 28
Start-Up After Extended Shutdown
. . . . . . . . . . . 28
Start-Up After Below Freezing
Conditions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Machine Shutdown — Normal Conditions
. . . . 28
Machine Shutdown — Below Freezing
Conditions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Actions After Abnormal Shutdown
. . . . . . . . . . . 29
Actions After Power Interruption
. . . . . . . . . . . . . 29
PERIODIC SCHEDULED MAINTENANCE
. . . . . . 29
Every Day of Operation
. . . . . . . . . . . . . . . . . . . . . . 29
Every Month of Operation
. . . . . . . . . . . . . . . . . . . 29
Every 2 Months of Operation
. . . . . . . . . . . . . . . . 29
Every 6 Months of Operation
. . . . . . . . . . . . . . . . 29
Every Year of Operation
. . . . . . . . . . . . . . . . . . . . . 29
Every 3 Years of Operation
. . . . . . . . . . . . . . . . . . 29
Every 5 Years or 20,000 Hours
of Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
MAINTENANCE PROCEDURES
. . . . . . . . . . . . . 29-40
Log Sheets
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Purge Manual Exhaust Procedure
. . . . . . . . . . . . 31
Absorber Loss Determination
. . . . . . . . . . . . . . . . 31
Noncondensable Accumulation Rate
. . . . . . . . . 31
Machine Leak Test
. . . . . . . . . . . . . . . . . . . . . . . . . . 33
Machine Evacuation
. . . . . . . . . . . . . . . . . . . . . . . . . 33
Solution or Refrigerant Sampling
. . . . . . . . . . . . 34
• SOLUTION SAMPLE
• REFRIGERANT SAMPLE
Solution Analysis
. . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Inhibitor
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Adding Octyl Alcohol
. . . . . . . . . . . . . . . . . . . . . . . . 35
Removing Lithium Bromide from
Refrigerant
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Refrigerant Charge Adjustment
. . . . . . . . . . . . . . 35
Capacity Control Adjustment
. . . . . . . . . . . . . . . . 35
Low-Temperature Cutout Adjustment
. . . . . . . . . 35
Cycle-Guard™ System Operation
. . . . . . . . . . . . 35
Thermoswitch Adjustment
. . . . . . . . . . . . . . . . . . . 36
Low-Refrigerant Level Operation
. . . . . . . . . . . . . 36
Internal Service
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Service Valve Diaphragm Replacement
. . . . . . . 36
Hermetic Pump Inspection
. . . . . . . . . . . . . . . . . . . 36
• DISASSEMBLY
• INSPECTION
• REASSEMBLY
• COMPLETION
Solution Decrystallization
. . . . . . . . . . . . . . . . . . . 40
Condensing Water Tube Scale
. . . . . . . . . . . . . . . 40
Water Treatment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
TROUBLESHOOTING GUIDE
. . . . . . . . . . . . . . . 41,42
2
Summary of Contents for 16JT Series
Page 11: ...Fig 10 Typical Wiring Diagram 11 ...
Page 12: ...Fig 10 Typical Wiring Diagram cont 12 ...
Page 13: ...Fig 11 Typical Control Wiring 13 ...
Page 43: ......