Carrier PC 111 - Page 60

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Fig. 57 — Typical Wiring Schematic; 48FK,JK and 50FK,FY,JK,JY Units (054-074 Shown) (cont)

Main Page

Table of Contents1
Circuit 21
General2
Rooftop Information2
Safety Considerations2
VAV Control System2
Processor Board3
- P3 - Reset Limit5
- P4 - Demand Limit5
- P6 - Warm-Up Set Point5
- P7 - Sasp Reset Temperature5
- Configuration Header and Dip Switch5
Display Board5
Relay Board5
Thermistors5
- T1 - Supply-Air Temperature Thermistor5
- T2 - Return-Air Temperature Thermistor5
Accessory Board7
- P3 - Reset Limit7
Compressor Operation7
Demand Limit Control Module (DLCM)7
Single-Step Demand Unit7
Economizer10
- Enthalpy Control10
- Differential Enthalpy10
High Capacity Modulating Power Exhaust Variable Frequency Drive12
Supply Fan Variable Frequency Drive (VFD)12
- Configuration13
- Installation18
Control Wiring13
- Night Setback Thermostat13
- Space Temperature Reset Accessory (50Dj900021)13
Controls Installation13
Space Temperature Reset13
Temperature Reset13
Demand Limit18
- Single-Step Demand Limit19
- Operating Sequence19
Control from Remote Building Management19
- Installation19
- Night Setback Control19
- Occupied/Unoccupied19
- Supply Duct Pressure Set Point Adjustment19
- System (BMS)19
- Two-Step Demand Limit19
- Unit Supply Air Set Point Adjustment19
- Fire Shutdown Mode22
- Installation22
- Operating Sequence22
- Pressurization Mode22
- Smoke Purge Mode22
Smoke Control Modes21
Air Pressure Tubing23
- Inlet Guide Vanes23
- Supply Fan Variable Frequency Drive23
- Configuration23
- Modulating Power Exhaust25
Configuration25
Initial Check25
Installation25
Start-Up25
Configuration Header26
DIP Switches26
- Single-Step Demand Limit26
- Two-Step Demand Limit26
Adjusting Set Points27
Potentiometers27
Single-Step Demand Limit27
Supply Fan Control with IGV Option28
Supply Fan Control with VFD Option28
Installation29
High Capacity Power Exhaust (48FM and 50FM,FS Units)30
Modulating Power Exhaust Option or Accessory) (48FK,JK and 50FK,JK Units)30
Configuration31
Quick Test Program31
Start Unit31
Digital Display34
- Codes 20 through 30 and 88, Operational Status34
- Codes 51 through 87, Diagnostic Information34
  - Single-Step Demand Limit34
  - Operating Sequence34
Operating Information34
Operating Sequence35
Head Pressure Control36
High Capacity Modulating Power Exhaust (48FM and 50FM,FS Units)38
Modulating Power Exhaust (48FK,JK and 50FK,JK Units Option or Accessory)38
Supply Fan Control with IGV38
Supply Fan Control with VFD38
Unit Staging38
- Configuration46
- Two-Step Demand Limit51
- Configuration52
- Installation62
- Operating Sequence62
- Installation63
- Two-Step Demand Limit63
- Installation64
- Manufacturer Reserves the Right to Discontinue, or Change at any Time, Specifications or Designs Without Notice and Without Incurring Obligations64

Carrier PC 111 - Page 60

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