YPC TWO-STAGE DIRECT-FIRED AND STEAM ABSORPTION CHILLER/HEATERS

YPC TWO-STAGE
DIRECT-FIRED AND STEAM ABSORPTION
CHILLER/HEATERS

MODELS
DIRECT-FIRED
YPC-FA-12SC THROUGH YPC-FZ-19S
YPC-FD-19G THROUGH YPC-FD-20G
STEAM-FIRED
YPC-ST-14SC – YPC-ST-19S
YPC-ST-19G THROUGH YPC-ST-22GL
UNITS SHOWN:
DIRECT-FIRED “S” MODEL
STEAM-FIRED “G” MODEL


SECTION 1 INTRODUCTION
Introduction
Comparison Of Cycles
How It Works
Cooling Cycle
Heating Cycle (without Optional Hot Water Heat Exchanger - Standard Heating)
Heating Cycle (with Optional Hot Water Heat Exchanger - High-Temperature Heating)
Simultaneous Heating And Cooling
Description Of Major Components and Subsystems Control Descriptions
SECTION 2 CRYSTALLIZATION
Dilution Cycle and Crystallization
Fluctuating Tower Water Temperature
Measures To Prevent Crystallization
How To Tell If A Unit is Crystallized
SECTION 3 PURGING AND NON-CONDENSABLES
Non-Condensables
Non-Condensable Quantities
Continuous Internal Purging While
Unit Is Operating
Purge Components
Purge Pump
Purge Tank
Purge Eductor
Gas Separator
Valves
Oil Separator
Absolute Pressure Gauge
Purging Frequency
When To Purge The Purge Tank
When To Purge The Absorber
When To Purge The Hot Water Heater
SmartPurgeTM
SECTION 4 PUMPS
Purge Pump Operation
Cleanliness
Types Of Lubricants
Purge Pump Piping and Operating Valves
The Principle Of Gas Ballast
Oil Level Determination
Bubble Leak Test Procedure
Purge Pump Maintenance
Vacuum Problems
Oil Changes And Oil Level
Shaft Seal Replacement
Repairing Oil Leaks
Drive Problems
Buffalo Pumps
Introduction
Troubleshooting
Pump Overhaul
SECTION 5 BURNERS
Model Identification
Gas Trains
Burners
Burner with Full Modulation Fuel/Air Control (Gas Operation)
Burner with Full Modulation Fuel/Air Control (Oil Operation)
Flame Safeguard Controls
R4140L
RM7840L
SECTION 6 STEAM CONTROL VALVES
Valve Performance
Valve Flow Characteristics
Valve Actuation
SECTION 7 STEAM HEAD GASKET REPLACEMENT
Replacement Procedure
SECTION 8 CHANGEOVER PROCEDURES
Heating/Cooling Changeover Procedure
Cooling/Heating Changeover Procedure
Cooling/Simultaneous Heating/Cooling Operation Changeover Procedure
SECTION 9 REFRIGERANT BLOWDOWN
Refrigerant Blowdown
Refrigerant Blowdown Procedure
SECTION 10 SOLUTION CHEMISTRY MAINTENANCE
Alcohol
SECTION 11 STEAM AND WATER QUALITY CONTROL
Water Quality
Steam/Condensate Quality
Tube Cleaning
SECTION 12 OPERATIONAL & MAINTENANCE RECOMMEDATIONS
Daily Operation Logs and Inspection
General
Preventative Maintenance Schedule
SECTION 13 PARAFLOW GLOSSARY
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