FINAL MACHINE ADJUSTMENT
Trimming Refrigerant Charge — After the macliine
has been placed in operation, it may be necessary
to adjust the refrigerant charge to obtain optimum
machine performance.
When machine full load is available, using the
extra 200 pounds of refrigerant, add refrigerant
slowly until the difference between the leaving
chilled water temperature and the cooler tempera
ture reaches design conditions or becomes a
minimum. Shut the machine down and allow
refrigerant to drain to the cooler, mark the level
indicator and maintain that shutdown refrigerant
level.
INSTRUCTING THE CUSTOMER OPERATOR
Be sure the operator carefully reads and under
stands the I9CB Operating and Maintenance
Instructions.
Point out the following machine components,
explain their function and that of the system in
which they are used.
1. Compressor—Motor Assembly
a. Guide Vanes, Vane Positioner
b. Refrigerant-Cooled Motor
2. Cooler-Condenser-Economizer
a. Float Chamber, Sight Glasses
b. Thermowells
c. Rupture Disc
d. Refrigerant Charging Valve
3. Purge System
a. Importance of proper operation
b. Valves and System Operation
c. Sight Glasses, Gage
4. Filter-Drier System
a. Cartridge Removal
b Moisture Indicator Check
c. Shutoff Valve Function
5. Lubrication System
a. Oil Pump, Cooler, Filter
b. Solenoid Valve, Plug Cock
c. Heater, Thermostat, Temperature Gage
d. Pressure Regulating Valve
e. Oil Level, Temperature
6. Control System
a. Manual Switches (ON-STOP, START, OIL-
PUMP)
b. Gages and Lights
c. Safety Controls
d. Operating Controls
e. Auxiliary and Special Controls
7. Auxiliary Equipment
a. Starter(s)
b. Pumps
c. Cooling Tower
d. Pumpout System (where applicable)
Describe Refrigeration Cycle
Review Maintenance
1. Scheduled
2 Extended Shutdown
3 Importance of Log Sheet
4 Importance of Water Treatment
Check Operator Knowledge
1. Start-Stop Procedure
2 Safety and Operating Controls
Discuss Carrier Service
1. Availability
2. Method of Ordering Parts
Review Operating and Maintenance Instructions
For replacement items use Carrier Specified Parts. k
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Carrier Air Conditioning Company • Syracuse, New York
Tab 15 Foim 19CB-2SS Supeisedes 19CBUSS
Printed in U S A
10^73
Codes MA and ML
Catalog No 531-942
