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6.3 Check Refrigerant Lube
1. In Quick Test the refrigerant lube pressure can be checked. First open cooler valve and condenser drain valve,
then run the refrigerant pump. Usually the pressure drop across bearing is above 55 kPa. If the bearing pressure
drop is negative, please check pump rotation. If bearing pressure drop is below 55 kPa, please check if the
moisture filter is clogged.
2. Press the Stop button and listen for any unusual sounds from the compressor as it coasts to a stop.
6.4 To Prevent Accidental Start-Up
A chiller STOP override setting may be entered to prevent accidental start-up during service or whenever
necessary. From the Main Menu, access the General Parameters Menu and use the down arrow to reach Stop
Override on the GENUNIT table. Change Stop Override to Yes; then execute the command by touching the
lightning button. The message “ALM-276 Protective Limit - Stop Override” will appear in the Home Screen
message area. To restart the chiller, access the same screen and change the Stop Override option to No.
6.5 Check Chiller Operating Condition
Check to be sure that chiller temperatures, pressures, water flows, and refrigerant levels indicate the system is
functioning properly.
6.6 Instruct the Customer Operator
Ensure the operator( s) understand all operating and maintenance procedures. Point out the various chiller parts
and explain their function as part of the complete system.
6.6.1 Cooler - Condenser
High side float chamber, relief devices, refrigerant charging valve, temperature sensor locations, pressure
transducer locations, Schrader fittings, waterboxes and tubes, and vents and drains.
6.6.2 Motor compressor assembly
Guide vane actuator, transmission, motor cooling system, temperature and pressure sensors, sight glasses, motor
temperature sensors, and compressor serviceability.
6.6.3 Compressor Lubrication System
Valves, dryers and filters, liquid level switch.
6.6.4.Economizer
Float valve, drain valve, Schrader fitting, economizer isolation valve.
6.6.5 Control system
CCN and LOCAL start, reset, menu, softkey functions, HMI operation, occupancy schedule, set points, safety
controls, and auxiliary and optional controls.
6.6.6 Purge
Check for potential leaks by monitoring purge hours in RUNTIME. Note changes over time.
6.6.7 Auxiliary equipment
Starters and disconnects, separate electrical sources, pumps, and cooling tower.
6.6.8 Describe chiller cycles
Refrigerant, motor cooling, lubrication, and liquid reclaim.
6.6.9 Review maintenance
Scheduled, routine, and extended shutdowns, importance of a log sheet, importance of water treatment and tube
cleaning, and importance of maintaining a leak-free chiller.
6.6.10 Safety devices and procedures
Electrical disconnects, relief device inspection, and handling refrigerant.
6.6.11 Check operator knowledge
Start, stop, and shutdown procedures, safety and operating controls, refrigerant charging, and job safety.
Summary of Contents for PIC 5+
Page 26: ...26 VFD not shown Fig 13 Sensors actuators location ...
Page 52: ...52 Fig 24 19DV control box ...
Page 53: ...53 1 Power supply 24V AC 2 LEN 3 CCN 4 Ethernet 5 USB Fig 25 19DV HMI box rear view ...
Page 54: ...54 Fig 26 19DV IOB1 wiring Fig 27 19DV IOB2 wiring ...
Page 57: ...57 ...
Page 113: ...113 APPENDIX A SmartView SCREEN AND MENU STRUCTURE ...
Page 114: ...114 Detailed menu description ...
Page 116: ...116 APPENDIX B MAINTENANCE SUMMARY AND LOGSHEETS Cont 19DV monthly Maintenance Log ...
