Carrier 16JT Series User Manual

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

Carrier 16JT Series Specifications

General

Brand	Carrier
Model	16JT Series
Category	Chiller
Language	English