2
PFS 155C - 315C
OM 135
Table of Contents
Unit Layout and Principles of Operation....................................................................3
Control Center....................................................................................................................................................3
Sequence of Operation......................................................................................................................................3
Start-up and Shutdown ................................................................................................5
Pre Start-up .........................................................................................................................................................5
Start-up................................................................................................................................................................5
Temporary Shutdown ........................................................................................................................................6
Start-up After Temporary Shutdown ..............................................................................................................6
Extended Shutdown...........................................................................................................................................6
Start-up After Extended Shutdown .................................................................................................................6
System Maintenance ..................................................................................................7
General.................................................................................................................................................................7
Lubrication System............................................................................................................................................7
Compressor Maintenance.................................................................................................................................7
Electrical Terminals ............................................................................................................................................8
Refrigerant Sightglass.......................................................................................................................................8
Lead-Lag..............................................................................................................................................................8
Crankcase Heaters .............................................................................................................................................9
Service .........................................................................................................................9
Compressor Solenoids ......................................................................................................................................9
Filter-Dryers ......................................................................................................................................................10
Pump-down .......................................................................................................................................................10
Liquid Injection Line Solenoid Valves ..........................................................................................................11
Electronic Expansion Valve.............................................................................................................................11
Electronic Expansion Valve Operation..........................................................................................................11
Evaporator.........................................................................................................................................................12
Condenser.........................................................................................................................................................12
Refrigerant Charging .......................................................................................................................................12
Liquid Presence Sensor...................................................................................................................................13
High Condenser Pressure Control.................................................................................................................13
Mechanical High Pressure Safety Control...................................................................................................13
Compressor Motor Protection .......................................................................................................................13
Phase/Voltage Monitor....................................................................................................................................14
Controls, Settings, and Functions .............................................................................15
200 Series MicroTech Control Panel.............................................................................................................15
Control Panel Layout.......................................................................................................................................16
Component Description..................................................................................................................................17
Keypad / Display Operation...........................................................................................................................22
Menu Structure ................................................................................................................................................26
MicroTech Menus .....................................................................................................27
Troubleshooting Chart ..............................................................................................43
Maintenance Schedules............................................................................................45
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1997 McQuay International
"Illustrations cover the general appearance of McQuay International products at the time of publication and we reserve the right to make changes in design and
construction at anytime without notice"
