Carrier PC 111- User Manual

Carrier PC 111

Carrier PC 111– User Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.

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Table of Contents:

  • Page 3 – Processor Board —; Table 1 — Pin Terminal Connector J1; Fig. 1 — Processor Board
  • Page 5 – Relay Board —; The relay board is used to control 24-v; Display Board —; The display board is located in the; Thermistors —; The processor uses up to 5 thermistors to
  • Page 6 – Table 3 — Output Pin and Terminal Assignments
  • Page 10 – Economizer —; Economizer control is used to control the; Fig. 13 — Thermistor T3 and T4 Locations,
  • Page 18 – Demand Limit —; The demand limit function provides a; SPACE TEMPERATURE RESET — 4 SENSOR AVERAGING APPLICATION; Fig. 26 — Space Temperature Sensor Averaging
  • Page 19 – Fig. 29 — 115-Volt Field Wiring to Accessory
  • Page 21 – Smoke Control Modes —; Fig. 30 — Remote SASP Wiring; Fig. 31 — External Alarm Indication
  • Page 22 – Table 5 — Smoke Control Modes
  • Page 23 – Table 7 — Switch Functions; Air Pressure Tubing —; Table 8 — Tubing Size
  • Page 24 – Fig. 32 — Smoke Control Wiring
  • Page 25 – Initial Check; Fig. 33 — Modulating Power Exhaust and Inlet
  • Page 26 – Table 9 — Potentiometer Inputs and Ranges; Configuration Header —; The configuration header is a; Table 10 — Configuration Header and; DIP Switches —; The DIP switches configure the unit for
  • Page 27 – Table 12 — DIP Switches; Adjusting Set Points —
  • Page 28 – Supply Fan Control with IGV Option —; The inlet; Supply Fan Control with VFD Option —; The VFD
  • Page 29 – SPEED CTRL; STOP; Fig. 39 — Differential Pressure Switch for Inlet; Fig. 40 — Variable Frequency Drive Keypad
  • Page 30 – Table 13 — VFD Set Point (Frequency Command) for Duct Pressure; The power exhaust VFD will modu-
  • Page 31 – START UNIT
  • Page 32 – Table 16 — Quick Test, Unit Configuration and Switch Check
  • Page 34 – Table 19 — Sensor Resistance Values; If the quick test steps do not operate as described above, a; OPERATING INFORMATION; The VAV control system uses a 2-digit
  • Page 35 – Operating Sequence —
  • Page 36 – Head Pressure Control —
  • Page 42 – Table 20 — Compressor Loading and Unloading Sequences
  • Page 43 – Table 20 — Compressor Loading and Unloading Sequences (cont)
  • Page 44 – TROUBLESHOOTING; Table 21 — Controls Troubleshooting
  • Page 45 – Table 22 — Operation Status Codes; Restart Procedure —
  • Page 46 – Table 23 — Diagnostic Codes; The processor monitors the low-pressure switch. If the
  • Page 49 – Fig. 49 — Processor Board Test Points
  • Page 51 – Step 2 — High-voltage relay resistance check.; Table 27 — Terminal Strip J6 Connection; Table 28 — Terminal Strip J5 Connector
  • Page 52 – Enthalpy Sensor Checkout —; Table 29 — Enthalpy Sensor Checkout; Economizer Motor —
  • Page 53 – Fig. 54 — Supply Fan Variable Frequency Drive
  • Page 54 – Table 30 — Carrier Default Program Parameter Values (Supply Fan VFD)
  • Page 56 – Fig. 56 — Variable Frequency Drive Terminal Block
  • Page 57 – Unit Wiring —
  • Page 58 – LEGEND AND NOTES FOR FIG. 57
  • Page 62 – SERVICE TRAINING; • Unit Familiarization
  • Page 63 – CONTROL SETTINGS
  • Page 64 – ELECTRICAL
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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 111

Catalog No. 534-763

Printed in U.S.A.

Form 48/50F,J-3T

Pg 1

3-00

Replaces: 48/50F,J-1T

Book 1

1

Tab

1a 1b

Controls Operation,

and Troubleshooting

CONTENTS

Page

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . . . . 2

GENERAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Rooftop Information

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

VAV Control System

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Processor Board

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

• P1 — SUPPLY-AIR SET POINT
• P2 — ECONOMIZER POSITION
• P3 — RESET LIMIT
• P4 — DEMAND LIMIT
• P5 — ECONOMIZER MINIMUM POSITION
• P6 — WARM-UP SET POINT
• P7 — SASP RESET TEMPERATURE
• PROCESSOR BOARD OUTPUTS
• CONFIGURATION HEADER AND DIP SWITCH

ASSEMBLY

Relay Board

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Display Board

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Thermistors

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

• T1 — SUPPLY-AIR TEMPERATURE THERMISTOR
• T2 — RETURN-AIR TEMPERATURE THERMISTOR
• T3 — SATURATED CONDENSING TEMPERATURE,

CIRCUIT 1

• T4 — SATURATED CONDENSING TEMPERATURE,

CIRCUIT 2

• T10 — RESET TEMPERATURE

Compressor Operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . 7

• CONTROL RELAY (CR)

Accessory Board

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

• P3 — RESET LIMIT
• P5 — ECONOMIZER MINIMUM POSITION
• P6 — MORNING WARM-UP TEMPERATURE

Single-Step Demand Unit

. . . . . . . . . . . . . . . . . . . . . . . . . 7

Demand Limit Control Module (DLCM)

. . . . . . . . . . . 7

Economizer

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

• ENTHALPY CONTROL
• DIFFERENTIAL ENTHALPY

Supply Fan Variable Frequency Drive (VFD)

. . . . . 12

High Capacity Modulating Power

Exhaust Variable Frequency Drive

. . . . . . . . . . . . 12

Temperature Reset

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

CONTROLS INSTALLATION

. . . . . . . . . . . . . . . . . . 13-25

Control Wiring

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

• NIGHT SETBACK THERMOSTAT
• SPACE TEMPERATURE RESET ACCESSORY

(50DJ900021)

Space Temperature Reset

. . . . . . . . . . . . . . . . . . . . . . 13

• INSTALLATION
• CONFIGURATION
• OPERATING SEQUENCE

Demand Limit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

• SINGLE-STEP DEMAND LIMIT
• TWO-STEP DEMAND LIMIT
• INSTALLATION
• CONFIGURATION
• OPERATING SEQUENCE

Page

Control From Remote Building Management

System (BMS)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

• OCCUPIED/UNOCCUPIED
• NIGHT SETBACK CONTROL
• UNIT SUPPLY AIR SET POINT ADJUSTMENT
• DEMAND UNIT (1-STAGE OR 2-STAGE)
• SUPPLY DUCT PRESSURE SET POINT ADJUSTMENT
• EXTERNAL ALARM SIGNAL
• REMOTE ECONOMIZER CONTROL

Smoke Control Modes

. . . . . . . . . . . . . . . . . . . . . . . . . . . 21

• FIRE SHUTDOWN MODE
• PRESSURIZATION MODE
• EVACUATION MODE
• SMOKE PURGE MODE
• INSTALLATION
• CONFIGURATION
• OPERATING SEQUENCE

Air Pressure Tubing

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

• INLET GUIDE VANES
• SUPPLY FAN VARIABLE FREQUENCY DRIVE
• MODULATING POWER EXHAUST

START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-31

Initial Check

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Configuration Header

. . . . . . . . . . . . . . . . . . . . . . . . . . . 26

DIP Switches

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Adjusting Set Points

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Potentiometers

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Supply Fan Control with IGV Option

. . . . . . . . . . . . 28

Supply Fan Control with VFD Option

. . . . . . . . . . . . 28

Modulating Power Exhaust Option or

Accessory) (48FK,JK and 50FK,JK Units)

. . . . . 30

High Capacity Power Exhaust

(48FM and 50FM,FS Units)

. . . . . . . . . . . . . . . . . . . . 30

START UNIT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31-34

Quick Test Program

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

OPERATING INFORMATION

. . . . . . . . . . . . . . . . . . 34-44

Digital Display

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

• CODES 0 THROUGH 8, CAPACITY STEPS
• CODES 20 THROUGH 30 AND 88, OPERATIONAL

STATUS

• CODES 51 THROUGH 87, DIAGNOSTIC

INFORMATION

Operating Sequence

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

• SIZE 034, 038 AND 048-088 UNITS
• SIZE 044 UNITS
• SIZE 104 UNITS

Head Pressure Control

. . . . . . . . . . . . . . . . . . . . . . . . . . 36

Supply Fan Control with IGV

. . . . . . . . . . . . . . . . . . . . 38

Supply Fan Control with VFD

. . . . . . . . . . . . . . . . . . . . 38

Modulating Power Exhaust (48FK,JK and

50FK,JK Units Option or Accessory)

. . . . . . . . . . 38

High Capacity Modulating Power Exhaust

(48FM and 50FM,FS Units)

. . . . . . . . . . . . . . . . . . . . 38

Unit Staging

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

48FK,JK034-104

48FM078-104

50FK,FY,JK,JY034-104

50FM,FS078-104

Variable-Air Volume Rooftop Units

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Summary

Page 3 - Processor Board —; Table 1 — Pin Terminal Connector J1; Fig. 1 — Processor Board

3 The VAV control system monitors and controls the follow- ing functions of the rooftop unit:• supply-air temperature (unit capacity) • morning warm-up or electric heat (if equipped) • head pressure control, fan cycling • economizer position • diagnostic display • unit check-out (quick test) • suppl...

Page 5 - Relay Board —; The relay board is used to control 24-v; Display Board —; The display board is located in the; Thermistors —; The processor uses up to 5 thermistors to

5 All of the potentiometers must be set before the unit is start- ed in order for the unit to function properly. See Start Up, Po-tentiometers section on page 27 for information on establishingset points. Each of the potentiometers has a valid range that isused by the control. The valid range is def...

Page 6 - Table 3 — Output Pin and Terminal Assignments

6 Table 3 — Output Pin and Terminal Assignments LEGEND *Circuit 1. †Circuit 2. **U2 is not used on 044 units. ††OFC2 on 034-048 units; OFC3 on 054-104 units. || Used on 054-104 units only. OUTPUT PIN- TERMINAL NAME RATING DEVICE J6-1 Stage 1Compressor Relay (K1)* 24 vac CR1 J6-2 Stage 2Compressor Re...

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