High Discharge Temperature Control
If the discharge temperature increases above 160 F (71.1 C) (PSIO Software Version 09 and
higher) or 180 F (82 C) (PSIO Software Version 08 or lower), the guide vanes are proportionally
opened to increase gas flow through the compressor. If the leaving chilled water temperature is
then brought 5° F (2.8° C) below the control set point temperature, the controls will bring the
machine into the recycle mode.
Oil Sump Temperature Control
The oil sump temperature control is regulated by the PIC which uses the oil heater relay
when the machine is shut down.
As part of the pre-start checks executed by the controls, oil sump temperature is compared
against evaporator refrigerant temperature. If the difference between these 2 temperatures is
50 F (27.8 C) or less, the start-up will be delayed until the oil temperature is 50 F (27.8 C) or
more. Once this temperature is confirmed, the start-up continues.
PSIO Software Version 08 and Lower
The oil heater relay is energized whenever the chiller compressor is off, and the oil sump
temperature is less than 140 F (60 C) or sump temperature is less than the cooler refrigerant
temperature plus 60° F (33.3° C). The heater is then turned off when the oil sump temperature
is: 1) more than 160 F (71.1 C); or 2) the sump temperature is more than 145 F (62.8 C) and
more than the cooler refrigerant temperature plus 65° F (36.1° C). The heater is always off
during start-up or when the compressor is running.
Содержание PC211
Страница 317: ...Figure 1 19XL Identification ...
Страница 318: ...Figure 2A Front View Typical 19XL Components Design I See next page for Rear View ...
Страница 319: ...Figure 2A Rear View Typical 19XL Components Design I ...
Страница 320: ...Figure 2B Front View Typical 19XL Components Design II See next page for Rear View ...
Страница 321: ...Figure 2B Rear View Typical 19XL Components Design II ...
Страница 322: ...Figure 3 Refrigerant Motor Cooling and Oil Cooling Cycles ...
Страница 323: ...Figure 4 Lubrication System ...
Страница 324: ...Figure 5 Cutler Hammer Solid State Starter Internal View ...
Страница 325: ...Figure 6 Benshaw Inc Solid State Starter Internal View ...
Страница 326: ...Figure 7 Typical Starter Front View Solid State Starter Shown ...
Страница 327: ...Figure 8 19XL Controls and Sensor Locations ...
Страница 328: ...Figure 9 Control Sensors Temperature ...
Страница 329: ...Figure 10 Control Sensors Pressure Transducer Typical ...
Страница 330: ...Figure 11 Control Panel Front View with Options Module ...
Страница 331: ...Figure 12 Power Panel with Options ...
Страница 332: ...Figure 13 LID Default Screen ...
Страница 333: ...Figure 14 LID Service Screen ...
Страница 334: ...Figure 15 Example of Point Status Screen Status01 ...
Страница 335: ...Figure 16 19XL Menu Structure ...
Страница 336: ...Figure 17 19XL Service Menu Structure ...
Страница 337: ...Figure 18 Example of Time Schedule Operation Screen ...
Страница 338: ...Figure 19 Example of Set Point Screen ...
Страница 339: ...Figure 20 19XL Hot Gas Bypass Surge Prevention ...
Страница 340: ...Figure 21 19XL with Default Metric Settings ...
Страница 341: ...Figure 22 Example of Attach to Network Device Screen ...
Страница 342: ...Figure 23 Example of Holiday Period Screen ...
Страница 344: ...Figure 25 Typical Wet Bulb Type Vacuum Indicator ...
Страница 345: ...Figure 26 19XL Leak Test Procedures ...
Страница 346: ...Figure 27 Typical Optional Pumpout System Piping Schematic with Storage Tank ...
Страница 347: ...Figure 28 Typical Optional Pumpout System Piping Schematic without Storage Tank ...
Страница 348: ...Figure 29 Dehydration Cold Trap ...
Страница 349: ...Figure 30 Benshaw Inc Solid State Starter Power Stack ...
Страница 350: ...Figure 31 Ramp Up and Starting Torque Potentiometers ...
Страница 351: ...Figure 32 Typical Potentiometer Adjustment ...
Страница 352: ...Figure 33 Typical Cutler Hammer Solid State Starter ...
Страница 353: ...Figure 34 Correct Motor Rotation ...
Страница 356: ...Figure 37 Optional Pumpout System ...
Страница 357: ...Figure 38 Guide Vane Actuator Linkage ...
Страница 358: ...Figure 39 19XL Float Valve Designs ...
Страница 359: ...Figure 40 Optional Pumpout System Controls ...
Страница 360: ...Figure 41 PSIO Module Address Selector Switch Locations and LED Locations ...
Страница 361: ...Figure 42 LID Module Rear View and LED Locations ...
Страница 362: ...Figure 43 Processor PSIO Module ...
Страница 363: ...Figure 44 Starter Management Module SSM ...
Страница 364: ...Switch Setting Option Module 1 Option Module 2 S1 S2 6 4 7 2 Figure 45 Options Module ...
Страница 365: ...Figure 46 Typical Benshaw Inc Solid State Starter Internal View ...
Страница 366: ...Figure 47 Resistance Check ...
Страница 367: ...Figure 48 SCR and Power Poles ...
Страница 368: ...Figure 49 Typical Cutler Hammer Solid State Starter Internal View ...
Страница 369: ...Figure 50 Cutler Hammer Terminal Functions ...
Страница 370: ...Figure 51 Solid State Starter General Operation Troubleshooting Guide Typical ...
Страница 371: ...Figure 52 Solid State Starter Starter Fault Motor Will Not Start Troubleshooting Guide Typical ...
Страница 373: ...Figure 54 Compressor Fits and Clearances Continued ...
Страница 374: ...Figure 55 Compressor Fits and Clearances Continued ...