Carrier 50FK, JK034-074 Cooling Size 054 Units, Cooling Size 064 Units, Cooling Size 088 Units

Page 43

Table 19 Ð Compressor Loading and Unloading Sequences (cont)

COOLING

 

 

 

 

 

SIZE 054 UNITS

 

 

 

 

 

 

Lead Circuit

 

 

 

 

Lag Circuit

 

Active

 

Percent

STAGE

 

 

 

 

 

 

 

 

 

 

Comp 1

Unloader U1

Unloader U2

 

Comp 2

 

Cylinders

 

Capacity

0

 

OFF

OFF

 

OFF

 

 

OFF

0

0

1

 

ON

ON

 

ON

 

 

OFF

2

20

2

 

ON

ON

 

OFF

 

 

OFF

4

40

3

 

ON

OFF

 

OFF

 

 

OFF

6

60

4

 

ON

ON

 

OFF

 

 

ON

10

80

5

 

ON

OFF

 

OFF

 

 

ON

12

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COOLING

 

 

 

 

 

SIZE 064 UNITS

 

 

 

 

 

 

Lead Circuit

 

 

 

 

Lag Circuit

 

Active

 

Percent

STAGE

 

 

 

 

 

 

 

 

 

 

Comp 1

Unloader U1

Unloader U2

 

Comp 2

 

Cylinders

 

Capacity

0

 

OFF

OFF

 

OFF

 

 

OFF

0

0

1

 

ON

ON

 

ON

 

 

OFF

2

17

2

 

ON

ON

 

OFF

 

 

OFF

4

33

3

 

ON

OFF

 

OFF

 

 

OFF

6

50

4

 

ON

ON

 

ON

 

 

ON

8

67

5

 

ON

ON

 

OFF

 

 

ON

10

83

6

 

ON

OFF

 

OFF

 

 

ON

12

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COOLING

 

 

 

 

 

SIZE 074, 078 UNITS

 

 

 

 

 

 

Lead Circuit

 

 

 

 

Lag Circuit

 

Active

 

Percent

STAGE

 

 

 

 

 

 

 

 

 

 

Comp 1

Unloader U1

Unloader U2

 

Comp 2

 

Cylinders

 

Capacity

0

 

OFF

OFF

 

OFF

 

 

OFF

0

0

1

 

ON

ON

 

ON

 

 

OFF

2

14

2

 

ON

ON

 

OFF

 

 

OFF

4

29

3

 

ON

OFF

 

OFF

 

 

OFF

6

43

4

 

ON

ON

 

ON

 

 

ON

8

71

5

 

ON

ON

 

OFF

 

 

ON

10

86

6

 

ON

OFF

 

OFF

 

 

ON

12

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COOLING

 

 

 

 

 

SIZE 088 UNITS

 

 

 

 

 

 

Lead Circuit

 

 

 

 

Lag Circuit

 

Active

 

Percent

STAGE

 

 

 

 

 

 

 

 

 

 

Comp 1

Unloader U1

Unloader U2

 

Comp 2

 

Cylinders

 

Capacity

0

 

OFF

OFF

 

OFF

 

 

OFF

0

0

1

 

ON

ON

 

ON

 

 

OFF

2

16

2

 

ON

ON

 

OFF

 

 

OFF

4

33

3

 

ON

OFF

 

OFF

 

 

OFF

6

50

4

 

ON

ON

 

ON

 

 

ON

8

66

5

 

ON

ON

 

OFF

 

 

ON

10

83

6

 

ON

OFF

 

OFF

 

 

ON

12

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COOLING

 

 

 

 

 

 

SIZE 104 UNITS

 

 

 

 

 

 

 

Lead Circuit

 

 

 

Lag Circuit

 

Active

 

Percent

STAGE

 

 

 

 

 

 

 

 

 

 

Comp 1

 

Unloader U1

 

Comp 3

 

Comp 2

 

Comp 4

 

Cylinders

 

Capacity

0

 

OFF

 

OFF

 

OFF

 

OFF

 

OFF

 

0

 

0

1

 

ON

 

ON

 

OFF

 

OFF

 

OFF

 

4

 

20

2

 

ON

 

OFF

 

OFF

 

OFF

 

OFF

 

6

 

30

3

 

ON

 

ON

 

OFF

 

ON

 

OFF

 

10

 

50

4

 

ON

 

OFF

 

OFF

 

ON

 

OFF

 

12

 

60

5

 

ON

 

ON

 

OFF

 

ON

 

ON

 

14

 

70

6

 

ON

 

OFF

 

OFF

 

ON

 

ON

 

16

 

80

7

 

ON

 

ON

 

ON

 

ON

 

ON

 

18

 

90

8

 

ON

 

OFF

 

ON

 

ON

 

ON

 

20

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

43

Image 43
Contents Contents Controls Operation TroubleshootingGeneral Safety ConsiderationsEXV Pin Terminal Connector J1 Thermistor InputsConnector J1 Temperature Unit Size Terminal no Input DIPRNT Ð Return Status Switch InputsConnector J2 Status Switch Unit Size Terminal no 034-104Page IFC Output Pin and Terminal AssignmentsOutput PIN Name Rating Device Terminal HIRCompressor Operation Thermistor T1 Location, 50FK,JK034-048 Units Thermistor T1 Location, 50FK,JK054-074 Units Thermistor T2 Location, Size 034-048 Units Thermistor T3 and T4 Locations, Size 054-104 Units Input Integrated CircuitSpace Temperature Reset Controls InstallationUnit Control Box Arrangement, Sizes Unit Control Box Arrangement, Sizes Unit Control Box Arrangement, Sizes 088 Thermistor Resistance Voltage Drop CharacteristicsSpace Temperature Sensor Averaging Single-Step Demand Limit MSP = Sasp + Remote Sasp Wiring Smoke Control Modes Smoke Control Switches Required for Each ModeTubing Size Switch FunctionsSwitch DPS Ð Differential Pressure SwitchTerminal Block START-UP Modulating Power Exhaust Differential Pressure Switch SizesPotentiometer Inputs and Ranges Conguration Header DIP Switch Factory SettingsConguration Header Jumpers Switch Function Meaning Position DIP SwitchesInlet Guide Vane Motor 50FK,JK034-074 Units Variable Frequency Drive Keypad Jumper Removal to Disable MotorPressure VFD Set Point Frequency Command for Duct PressureChanging the VFD Set Point Frequency Command Control Signal Pressure VFD SET PointStart Unit Quick Normal Description Control Switch Test Display Step no Quick Test, Unit Conguration and Switch CheckQuick Normal Test Description Relay Number Quick Test, Thermistor and Potentiometer CheckQuick Test, Output Relay Check Quick Normal Description Thermistor or TestSensor Resistance Values Operating InformationPage Component Arrangement, 034-048 Units Component Arrangement, 054-104 Units Page Modulating Power Exhaust Component Locations Sizes Modulating Power Exhaust Component Locations Sizes Page Compressor Loading and Unloading Sequences Cooling Size 104 Units Cooling Size 054 UnitsCooling Size 064 Units Cooling Size 088 UnitsOperation Status Codes TroubleshootingControls Troubleshooting Symptoms Probable Causes SolutionsDiagnostic Codes Codes 71 to 76 THERMISTOR/RESISTOR Failure Page TP6 Terminals Voltage ACTest PIN Voltage DC TP3 TP4PIN Terminal Voltage DC Quick Test J9 PIN Numbers Step noPIN Voltage Terminal Pin Terminal Connector J1 VoltagesPin Terminal Connector J2 Voltages Terminal Strip J6 Connection Resistance ReadingEnthalpy Sensor Checkout Terminal Strip J5 Connector Resistance ReadingQuick Test J5 PIN Numbers Step no Variable Frequency Drive Parameter Group Default Value Carrier Default Program Parameter ValuesMotor Overload Settings Required User Adjusted DefaultsMTR ALMLAT LPSPage Page Call for Free Catalog Service TrainingPRE-START-UP II. Preliminary Checklist ItemsIV. Notes III. START-UP