Carrier 48FP Controls Operation And Troubleshooting
  1. Manuals
  2. Brands
  3. Carrier Manuals
  4. Air Conditioner Accessories
  5. 48FP
  6. Controls operation and troubleshooting
Carrier 48FP Controls Operation And Troubleshooting

Carrier 48FP Controls Operation And Troubleshooting

Single-package heating/cooling units with product integrated controls 50/60 hz
Hide thumbs
Table of Contents

Advertisement

Quick Links

Controls Operation and Troubleshooting
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Carrier Comfort Network System
Architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
PIC Rooftop Information. . . . . . . . . . . . . . . . . . . . . . . . . . 4
Digital Air Volume (DAV) Linkage . . . . . . . . . . . . . . . . . 4
MAJOR CONTROL COMPONENTS . . . . . . . . . . . . . 4-8
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
• HIGH-VOLTAGE RELAY MODULES (DSIO1 AND
• KEYPAD AND DISPLAY MODULE (HSIO)
• ECONOMIZER ACTUATORS
• VARIABLE FREQUENCY DRIVES
• INLET GUIDE VANES
• MODULATING POWER EXHAUST
• THERMISTORS AND REFRIGERANT PRESSURE
• FAN STATUS PRESSURE SWITCH
• CHECK FILTER PRESSURE SWITCH
Optional and Accessory Control
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
• RELATIVE HUMIDITY (RH) SENSORS
• HUMIDIFIER DEVICES
• HYDRONIC COIL AND CONTROL VALVE
CONTROLS AND FUNCTIONS . . . . . . . . . . . . . . . . . 8-34
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
(HSIO). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
• STANDBY/RUN MODE
• SUMMARY DISPLAY
• OPERATING MODE DISPLAY
• LOGON AND LOGOFF/PASSWORD
• DATA RESET
• CHANGING DISPLAY FOR METRIC UNITS
Basic System Functions . . . . . . . . . . . . . . . . . . . . . . . . 12
• BASIC SYSTEMS
• STANDBY
• SUPPLY FAN
• COOLING
• HEATING
Service Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
• ALERTS AND ALARMS
• QUICK TEST
Schedules Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
• TIME SCHEDULES
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 1
PC 111
Catalog No. 534-738
Tab 1a 1b
CONTENTS
Page
2
Printed in U.S.A.
50FB,FP,JB,JP,NB,NP034-104
Single-Package Heating/Cooling Units
With Product Integrated Controls
• TIMED DISCRETE OUTPUT
• TIMED OVERRIDE
• OPTIMAL START
• OPTIMAL STOP (CV Units Only)
• ECONOMIZER
• MODULATING POWER EXHAUST
Smoke Control Group . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
• PRESSURIZATION
• EVACUATION
• SMOKE PURGE
• FIRE SHUTDOWN
Special Ventilation Group . . . . . . . . . . . . . . . . . . . . . . . 25
• IAQ (Pre-Occupancy) PURGE
• OUTDOOR AIR CONTROL (OAC)
• IAQ/OAQ REHEAT
• HUMIDIFIER CONTROL
• SUPPLY-AIR SET POINT RESET FROM
SPACE TEMPERATURE (VAV Units Only)
Remote Controls Group . . . . . . . . . . . . . . . . . . . . . . . . . 31
• REMOTE START
Special Systems Group . . . . . . . . . . . . . . . . . . . . . . . . . 31
• HYDRONIC HEATING
• FREEZESTAT
• LEAD/LAG OPERATION
• DEMAND LIMIT
• DIGITAL AIR VOLUME (DAV)
INSTALLATION INFORMATION . . . . . . . . . . . . . . . 34-43
Control Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Smoke Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Heat Interlock Relay (HIR)
Function Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Remote SASP Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Remote START/OCCUPIED Control. . . . . . . . . . . . . . 35
Timed Discrete Output . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Air Pressure Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Space Temperature Sensors . . . . . . . . . . . . . . . . . . . . 41
Humidity Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Form 48/50F,J-2T
Pg 1
48FP,JP,NP034-074
50/60 Hz
Page
7-99
Replaces: 48/50F,J,N-1T

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 48FP and is the answer not in the manual?

Questions and answers

Related Manuals for Carrier 48FP

Summary of Contents for Carrier 48FP

  • Page 1: Table Of Contents

    • ACCESSING FUNCTIONS AND SUBFUNCTIONS • TRANSDUCERS AND SUCTION THERMISTORS • OPERATING MODE DISPLAY Carrier Comfort Network (CCN) Group ..33 • LOGON AND LOGOFF/PASSWORD • DEMAND LIMIT • DATA RESET •...

  • Page 2: Safety Considerations

    Economizer Actuator ......84 operation, and troubleshooting data for 48FP,JP,NP Variable Frequency Drive ......84 and 50FB,FP,JB,JP,NB,NP rooftop units.
  • Page 3 HVAC EQUIPMENT COMFORT AIR DISTRIBUTION-DIGITAL AIR VOLUME CONTROL (DAV) CONTROLLER LEGEND — Carrier Comfort Network — Digital Air Volume HVAC — Heating, Ventilation, and Air Conditioning — Product Integrated Controls — Terminal Control Unit Fig. 1 — CCN System Architecture...

  • Page 4: Pic Rooftop Information

    VAV air terminals must be equipped Heating, ventilation and air conditioning (HVAC) and other with Carrier PIC controls and the air terminals must be linked building equipment being controlled by PICs or Comfort by a Terminal System Manager (TSM). The TSM acts as the Controller Device have the inherent ability to ‘talk’...
  • Page 5 LEGEND — High-Pressure Switch — Circuit Breaker — Plug Assembly — Control Circuit Breaker — Heater Relay — Primary — Crankcase Heater — Induced-Draft Contactor PSIO — Processor Module — Indoor-Fan Contactor — Return-Air Thermistor — Compressor Lockout — Indoor-Fan Motor —...

  • Page 6: Space Temperature Sensor (T-55)

    HIGH-VOLTAGE RELAY MODULES (DSIO1 and the airflow supplied by the unit supply fan and provides the DSIO2) — The DSIO modules close contacts to energize sup- PSIO1 module with a 10-vdc discrete signal for fan status. ply and condenser fan contactors. The modules also control CHECK FILTER PRESSURE SWITCH —...

  • Page 7: Outdoor Air Volume Control

    LEGEND NEMA — National Electrical Manufacturers’ Association Fig. 3 — Space Temperature Sensor (T-55) LEGEND NEMA — National Electrical Manufacturers’ Association Fig. 4 — Space Temperature Sensor (T-56) NOTE: Sizes 034-074 also require the installation of the outdoor air velocity pressure with a velocity probe and pressure control options module (PSIO2), available as a factory- transducer (included in the accessory package).

  • Page 8: Controls And Functions

    NOTE: Sizes 034-074 also require the installation of the control options module (PSIO2), available as a factory- installed option or field-installed accessory. CONTROLS AND FUNCTIONS The internal logic circuits of the PIC controls consist essen- tially of seven sets of control loops that provide direction and control for the major unit systems.

  • Page 9: Accessing The Control System

    another control function (example: Fire Shutdown) or by ser- vice personnel in order to achieve an override or test function. GAIN — A parameter or correction factor used in a control loop calculation that adjusts the responsiveness and sensitivity of the control loop. Accessing the Control System (HSIO) KEYPAD AND DISPLAY MODULE (HSIO) —...
  • Page 10 Table 3 — HSIO Keypad and Display Module Functions and Subfunctions FUNCTIONS Status History Schedule Service Set Point Test FUNCTION Current Alarms Occupied Log on and System Test of Alarms Mode Log off Set Point Inputs Override (Unit) Current Alerts Maintenance Period 1 Software...

  • Page 11: Accessing Functions And Subfunctions

    Table 4 — Accessing Functions and Subfunctions OPERATION KEYPAD ENTRY DISPLAY DESCRIPTION To access a function, press the subfunction number and the func- STAGES Current stages tion name key. The display will show the subfunction group. To move to the other elements, scroll up or down using the arrow COOL X Cooling stages keys.

  • Page 12: Basic System Functions

    Table 7 — Configuring Units of Measure in Display DESCRIPTION HOW TO CONFIGURE SET POINT RANGE Metric = 1; Select Units of Measure UNITS English (Imperial) = 0 Basic System Functions — STANDBY — Standby is used to disable the unit during in- The unit control system stallation or service.
  • Page 13 During Unoccupied period with demand, the control will Sequence of Operation, Occupied Cooling (CV) — The econo- energize the fan contactor when demand is sensed. After fan mizer cycle must not be permitted or, if permitted, the out- status is confirmed, operating routines will commence. When door air damper position must be open to 90% or higher.
  • Page 14 Table 9 — Configuring Fan Operation (CV) DESCRIPTION HOW TO CONFIGURE SET POINT RANGE Select Auto or Continuous Operation FANM Auto = 0; Cont = 1* (CV only) *If value changed, enable Data Reset before leaving Table 10 — Cooling Control Operation Definitions ITEM DEFINITION CCSR...
  • Page 15 HEATING — The Staged Heating Control routine determines Loop (CSL) (at high limit value). This will drive cooling the staging of the available heating system to maintain space stages back to zero stages (at minimum time delay between comfort conditions. The heating cycle is available during the stages).

  • Page 16: Service Group

    To enable Occupied Heating (VAV units) press Configuration — To configure Alert set points, press Enter the password. Press to enter into the User Con- to enter the Alert Limits subfunction. Scroll to the figuration subfunction. Scroll down to OHEN (Occupied Heat- desired alert.
  • Page 17 Table 14 — Sensor Set Point Alert Limits, Ranges, and Default Values OCCUPIED ALERT ALERT HIGH NAME DESCRIPTION SPACE DEFAULT DEFAULT LIMIT LIMIT SUBFUNCTION STATUS (LOW) (HIGH) Building Occupied –0.25 in.wg 0.25 in.wg –0.5 in.wg 0.5 in.wg pressure Pressure Indoor-Air Occupied 0 ppm 800 ppm...

  • Page 18: Schedules Group

    Schedules Group — Configuration — To configure: This group includes Schedule I and II, Timed Discrete Output, Timed Override, Adaptive Op- 1. Connect control wires from external controlled device timal Start, and Adaptive Optimal Stop (available on CV units at PSIO2 Channel 44 (terminals J6/41 and J6/42). only).
  • Page 19 OPTIMAL START — The control will compute a time period OPTIMAL STOP (CV Units Only) — The control will com- (in minutes) to start Occupied Mode Warm-up prior to start of pute a time period prior to end of the current Occupied period, the Occupied Mode schedule, to arrive at Occupied set points then allow space temperature to drift up/down to the Expanded just as Occupied period begins.

  • Page 20: Economizer And Power Exhaust Group

    Enter the password. Press air) will result in more economical cooling operation. enter the Economizer subfunction of the Service function. The 48FP,JP,NP and 50FB,FP,NB,JB,JP,NP units have two methods of accomplishing differential enthalpy control: En- Scroll down to Minimum Damper Position (MDP). The default hanced enthalpy switch control operation and base unit control is 20%.

  • Page 21: Nighttime/Unoccupied Free Cooling

    RH Sensor Configuration for Differential Enthalpy — To configure the RH sensors for differential enthalpy, press to enter into the Service function. Enter the pass- word. Press to enter into the User Configuration sub- function. Scroll down to HUSN. The current configuration will be shown.
  • Page 22 When Nighttime Free Cooling is initiated, the economizer dampers drive full open. The supply fan runs until the space temperature drops below NTSP or space temperature drops be- low (OAT + 3 F). When the conditions are met, the economizer dampers close and the fan shuts off.
  • Page 23 If space pressure decreases until PEDM position is reduced To select the exhaust fan type, press to enter to 10% of open position, PEDM2 will open, deenergizing fan into the Service function. Enter the password. Press contactor PEC2 and auxiliary control relay PER, and shutting enter into the Factory Configuration subfunction.

  • Page 24: Smoke Control Group

    Smoke Control Group — for Pressurization, Smoke Purge, or Fire Shutdown and the sys- This group includes Pressur- tem will be placed in Fire Shutdown mode. To configure, make ization, Evacuation, Smoke Purge, and Fire Shutdown. the field-connection at channel 39. PRESSURIZATION —...

  • Page 25: Special Ventilation Group

    Special Ventilation Group — High Humidity: This group includes In- door Air Quality (IAQ), IAQ (Pre-Occupancy) Purge, Outdoor If unit is equipped with humidity sensors and RH > Air CFM Control (OAC), and IAQ/OAC Reheat. HHL, the IMP = 0 and economizer will close to MDP. INDOOR AIR QUALITY (IAQ) —...
  • Page 26 0 to 100%. tion of purge mode is user-configured (typically 5 minutes). The IAQ Purge is Mode 28. See Table 27. The factory- 5. If non-Carrier sensor used (see Fig. 13): installed economizer option is required. a. Specify IAQ sensor curve. Press to enter Sequence of Operation —...
  • Page 27 Table 28 — Configuring IAQ (Pre-Occupancy) Purge DESCRIPTION HOW TO CONFIGURE AT HSIO SET POINT RANGE Enable Purge PURG Enable = 1; Disable = 0 Configuration — See Table 28. To configure: The current delivered CFM value (OAC) is determined by interpolating from a unit-size-specific table relating airflow 1.

  • Page 28: Dehumidification And Humidifier Group

    Sequence of Operation — If the supply fan is off, all modes For units with electric heaters, simultaneous operation of are deactivated and the heating control valves are closed. For cooling and electric heaters is never permitted on 50FP,JP,NP IAQ Reheat to be active: IQMP > MDP and OAT < SASP. units.

  • Page 29: Supply Fan Duct Pressure And Vav Control Group

    Table 33 — Configuring Dehumidification and Reheat DESCRIPTION HOW TO CONFIGURE AT HSIO SET POINT RANGE Set Dehumidification Set Point 0 to 100% (“High Humidity Override”) NOTE: If Unit Type is VAV, unit must be configured for Occupied Heating Enabled (see Table 13, Configuring Heating). HUMIDIFIER CONTROL —...

  • Page 30: Supply-Air Set Point Reset (External Signal)

    To set the Static Pressure set point, press to enter To configure the Supply Air Temperature Reset Limit, press into the Set Point function and the Set Point subfunction. Scroll to enter into the Space Temperature Reset Config- down to SPSP. The current set point will be shown. The default uration subfunction.

  • Page 31: Remote Controls Group

    Remote Controls Group — connection from the control valve to Channel 43 is also re- This group includes Re- quired. The control options module (available as a factory-in- mote Start (Occupied/Unoccupied status control) and Space stalled option or field-installed accessory on size 034-074 units Temperature Offset (CV only).

  • Page 32: Head Pressure/Fan Cycling Control (Motormaster® Head Pressure Control)

    Table 39 — Configuring Hydronic Heating DESCRIPTION HOW TO CONFIGURE AT HSIO SET POINT RANGE Select Heat Type HEAT Hot water/Steam = 1*, None = 0 OHEN Enable = 1; Disable = 0 Opt: Enable Occupied Heating Select Heating Set Points: Occupied Heating Set Point OHSP 55 to 80 F (13 to 27 C)

  • Page 33: Transducers And Suction Thermistors

    50%. The range is 0 to 100%. puts. Alarms 74 and 75 (Low Pressure), Alarms 80 and 81 DIGITAL AIR VOLUME (DAV) — Carrier rooftop units (Low Saturated Suction Temperature), Alarms 82 and 83 (High with PIC may also have a communication linkage with the Superheat), and Alarms 84 and 85 (Low Superheat) will be VAV terminal units in a particular application.

  • Page 34: Installation Information

    6130 — E3, and an RJ11 female connector. The RJ11 connector is used to tap into the Carrier Comfort Network (CCN) at the sensor. Smoke Control — Four functions are provided by the See RJ11 Plug Wiring section on page 43 to connect the RJ11 base unit control to provide space smoke control in response to connector to the CCN.

  • Page 35: Function Wiring

    building fire alarm system, and the corresponding alarm is then to go to the Minimum Heating position when the unit goes into generated at the HSIO keypad or building supervisor. The the unoccupied or occupied heating mode. The HIR function is 4 modes are Fire Shutdown mode, Evacuation mode, Pressur- provided for this control.
  • Page 36 SIZES SIZES 034-048 054-104 TO PROCESSOR MODULE NO. 1 SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4 SPACE TEMPERATURE AVERAGING — 4 SENSOR APPLICATION SIZES SIZES 054-104 034-048 TO PROCESSOR MODULE NO. 1 SENSOR 1 SENSOR 3 SENSOR 2 LEGEND —...
  • Page 37 LEGEND DSIO — Relay Module Fig. 18 — Remote START/UNOCCUPIED Control LEGEND DSIO — Relay Module Fig. 17 — Differential Enthalpy Sensor Fig. 18 — Remote START/UNOCCUPIED Control FIELD-SUPPLIED ACCESSORY 24-V ISOLATED POWER SUPPLY OUTSIDE AIR RELATIVE HUMIDITY PSIO NO. 2 CH.
  • Page 38 SIZES SIZES 054-104 034-048 SW-2 SW-4 SW-3 SW-1 PSIO NO. 2 SIZES 054-104 SIZES 034-048 SW-5A SW-5A SW-5B SW-5B REMOVED FROM TB2-10 REMOVED FROM TB3-2 SWITCH SWITCH VOLTAGE FUNCTION NUMBER CONFIGURATION SW-1 N.O. Activate Fire Shutdown Mode SW-2 N.O. Activate Pressurization Mode SW-3 N.O.
  • Page 39 Fig. 23 — Timed Discrete Output Fig. 26 — Freezestat PSIO NO. 2 HUMIDIFIER HUM VLV ACTUATOR HUMIDIFIER RELAY CARRIER PART NO. HK35AB001 LEGEND LEGEND TB — Terminal Block — Constant Volume SASP — Supply-Air Set Point Field Wiring — Variable Air Volume Component Terminal Fig.
  • Page 40 PSIO NO. 1 TRANSDUCER ACCESSORY DPT1 10K OHM 1/2 WATT DPT2 10K OHM 1/2 WATT SPT1 10K OHM 1/2 WATT SPT2 SIZES SIZES 054-104 034-048 10K OHM 1/2 WATT LEGEND — Discharge Pressure PSIO NO. 2 Transducer SUCTION GAS — Resistor TEMPERATURE —...

  • Page 41: Timed Discrete Output

    Space Temperature Sensor sections on page 34. pressure transducer output is directed to the unit control mod- NOTE: Only Carrier T-55 sensors may be used for standard ule. On all sizes the DP transducer is located in the unit auxilia- T-55 space temperature averaging.
  • Page 42 Fig. 31 — Auxiliary Control Box Location; Size 054-104 Units LEGEND — Building Pressure — Duct Pressure — Plug — Pressure Switch Fig. 32 — Auxiliary Control Box Details; Size 034-048 Units...

  • Page 43: Interface

    — Terminal Block — Power Exhaust Contactor Fig. 33 — Auxiliary Control Box Details; Size 054-104 Units CARRIER COMFORT NETWORK INTERFACE IMPORTANT: When connecting the CCN communi- The units can be connected to the CCN if desired. The com- cation bus to a system element, use a color coding sys- munication bus wiring is supplied and installed in the field.

  • Page 44: Rj-11 Plug Wiring

    DATALINK AND DATAPORT — DataPort and DataLink connector. If conditions return to normal, check CCN are interface devices that permit a non-Carrier device to read connector, and run new cable if necessary. A short in and change (DataLink only) values in CCN system elements...
  • Page 45 • Alarm messaging via confirmed message services unit and system data and information. • Device re-initialization BAClink is the interface between Carrier’s CCN and a • Time synchronization BACnet Local Area Network (LAN). BAClink responds to re- BAClink supports the following BACnet object types: quests for data and receives and processes commands and data •...

  • Page 46: Start-Up

    START-UP The switch must be set prior to unit operation. To set the switch, turn the adjustment screw on top (center) of switch Initial Check slowly clockwise to find the "pivot" point where the filter sta- tus still reads clean under in the HSIO display.

  • Page 47: Adjusting Set Points

    3. Adjustments should be made to the blue cam only. The pointer on the red cam should remain centered and at the top, as this will deenergize motor no. 2 properly. 4. Each click of the blue cam changes the switch setting by approximately 3 degrees of travel.
  • Page 48 In the following example, demand limit will be enabled, and Press to scroll to the next display (the current date in the loadshed set point will be set at 60% of available capacity. month, date, and year format). The month is also entered as a 1.

  • Page 49: Set Point Function

    Table 46 — Set Point Directory SET POINT Subfunction Keypad Entry Display Comment 1 SET POINTS SET POINT System set points OHSP X Occupied heat set point X OCSP X Occupied cool set point X UHSP X Unoccupied heat set point X UCSP X Unoccupied cool set point X SPSP X...
  • Page 50 Table 47A — Set Point Ranges and Defaults (English Units) DISPLAY SET POINT DESCRIPTION DEFAULT VALUE ALLOWABLE RANGE Building pressure set point BPSP 0.05 in. wg 0 to .50 in. wg Economizer set point offset ECSO* 1 to 10 F High humidity override (percent) HHL†...
  • Page 51 Table 48 — Operating Modes TO CONFIGURE OPTION TO ENABLE MODE MODE OPERATING MODE Press Display Press* Display Space Temperature Reset SPCRESET RSEN ENB Demand Limit LOADSHED DLEN ENB HEATCOIL (MODULATING Unoccupied Heating — — HEAT (STAGED) COOLING Unoccupied Cooling —...

  • Page 52: Program Time Sequences

    Table 49 — Setting Daylight Savings Time KEYBOARD ENTRY DISPLAY COMMENTS DAYLIGHT Daylight savings time field configuration of set point function ENM X Month when daylight savings time begins ENM 4 Daylight savings time configured to start month 4 (April) ENTER END X Day of month when daylight savings time begins...

  • Page 53: Start Unit

    7. Scroll through the rest of the days (press ) to to be Subfunctions through define schedule sure that no other days have been flagged. Suppose, for of optional discrete output (schedule II). this example, Tuesday was flagged for this period. To NOTE: If the unit is connected to a DAV system, the unit time change this period from YES to NO, press ENTER...
  • Page 54 Table 50 — Schedule Directory SCHEDULE Subfunction Keypad Entry Display Comments Number of Override Hours (0 to 4 Hours); 1 OVERRIDE OVRD xHR Schedule I Period 1; Time Schedule I 2 PERIOD 1 PERIOD 1 OCC HH.MM Occupied Time Unoccupied Time UNO HH.MM Monday Flag MON X...
  • Page 55 ECONOMIZER — The economizer control loop will be de- Reset command, then issue Cooling Coil Submaster layed 2 minutes after the supply fan is turned ON, to allow sys- Reference (CCSR) to Cooling Submaster Loop (CSL). tem and temperatures to stabilize before starting control. When 3.

  • Page 56: Head Pressure Control

    (evaporator) fan is on. Two-stage factory- constant cfm of outdoor air and/or an allowable level of unde- installed gas heat is standard on the 48FP,JP,NP units. sirable gases or vapors (CO , CO, formaldehyde, etc.) with in- stallation of appropriate sensors and/or accessories.
  • Page 57 Sizes 088 and 104: The SCT is used to control the condenser transducers on units equipped with suction pressure transduc- (outdoor) fan motor(s) (OFM) controlled by the head pressure ers and suction sensors. Table 52 shows the fan configurations control relay (MMR) for each circuit. See Table 52 for fan and lists the on and off points for OFC1 and OFC2 (OFA and control points.
  • Page 58 Table 51B — Head Pressure/Fan Cycling Control (088 and 104 Sizes) MOTOR LOCATION UNIT CONFIGURATION OFM ON OFM OFF CIRCUIT: MOTOR ID NO. Standard First Stage SCT > (HPSP – 15 F) SCT < (HPSP – 37 F) (with standard SCT sensors) A: 1 for 90 secs AND (MMAS = Yes)
  • Page 59 Table 52 — Fan Sequence of Operation UNIT RELAY FAN(S) FAN ARRANGEMENT STAGE CIRCUIT RELAY SIZES CONTROLLED CONTROLLED OUTPUT OFM1 034-038 OFC1 — OFM2 OFM2 OFC1 — OFM1 044,048 OFC2 — OFM3 MMC1 OFM3 MMC2 OFM4 OFC1 — OFM1 054,064 OFC2 —...

  • Page 60: Control Loop Checkout

    MLG† SMG† Heating Coil Humidifier LEGEND *Factory setting; differs from replacement control default setting. †48FP,JP or 50FP,JP with optional or accessory electric heat- — Constant Volume ers only. — Master Loop Gain — Submaster Center Value — Submaster Loop Gain...

  • Page 61: Unit Operation

    Service Tool should be used to adjust the proportional Table 14). A 30-minute delay is used when changing from Un- and integral terms. Contact your Carrier representative for occupied to Occupied mode for these alerts. If an alert condi- more details.
  • Page 62 operation, this will be the MSAS (supply-air set point + reset) (Inputs) — This subfunction displays the rest of the for cooling and the heating set point for heating. system inputs. Press , then press . The compres- Press to display the control temperature. This display is sor A1 status is displayed with either ON or OFF based on the actual supply-air temperature leaving the unit.
  • Page 63 Table 54 — Status Directory (cont) STATUS Subfunction Keypad Entry Display Expansion (Press key) 1 ALARMS (cont) ALARM 84 LOW CIRCUIT A SUCTION SUPERHEAT ALARM 85 LOW CIRCUIT B SUCTION SUPERHEAT ALARM 86 ILLEGAL CONFIGURATION (Sizes 034-078 Only) ALARM 88 HYDRONIC COIL FREEZE STAT ALARM 89 PRESSURIZATION...
  • Page 64 Table 54 — Status Directory (cont) STATUS (cont) Subfunction Keypad Entry Display Expansion (Press key) 3 MODES (cont) MODE 27 MODE IS UNOCCUPIED MODE 28 MODE IS IAQ PURGE MODE 29 MODE IS OPTIMAL STOP MODE 30 MODE IS OCCUPIED HEAT MODE 31 MODE IS OCCUPIED COOL MODE 32...
  • Page 65 Table 54 — Status Directory (cont) STATUS (cont) Subfunction Keypad Entry Display Expansion (Press key) 6 TEMPERATURE (cont) SPT X SPACE TEMP X OAT X OUTSIDE AIR TEMP X OAT X OUTSIDE AIR TEMP X (–40 F to 245 F) ENTER 7 PRESSURE PRESSURE...
  • Page 66 Table 54 — Status Directory (cont) STATUS (cont) Subfunction Keypad Entry Display Expansion (Press key) 9 ANALOG (cont) INV X INVERTER X (Sizes 088,104)† ECON X ECONOMIZER X HCV X HEATING COIL VALVE X HCV X HEATING COIL VALVE X (0 to 100%) ENTER PERD X POWER EXHAUST/RETURN DAMPER X (Sizes 034-078)
  • Page 67 Table 54 — Status Directory (cont) STATUS (cont) Subfunction Keypad Entry Display Expansion (Press key) 10 OUTPUTS (cont) HS5 X HEAT STAGE 5 X (034-078 Only) HIR X HEAT INTERLOCK RELAY (034-078 Only) HUM1 X HUMIDIFIER 1ST STAGE X HUM1 X HUMIDIFIER 1ST STAGE X (0 = On, 1 = Off) ENTER DTCC X...
  • Page 68 Table 55 — Compressor Loading and Unloading Sequences (60 Hz Units) SIZE 034 UNITS COOLING Lead Circuit Lag Circuit Active Percent STAGE Comp Unload Unloader Comp Unloader Unloader Cyls Capacity SIZE 038 UNITS COOLING Lead Circuit Lag Circuit Active Percent STAGE Unloader Unloader...
  • Page 69 Table 55 — Compressor Loading and Unloading Sequences (60 Hz Units) (cont) SIZE 064 UNITS COOLING Lead Circuit Lag Circuit Active Percent STAGE Unloader Unloader Unloader Unloader Cyls Capacity Comp 1 Comp 2 SIZE 074,078 UNITS COOLING Lead Circuit Lag Circuit Active Percent STAGE...
  • Page 70 Table 56 — Compressor Loading and Unloading Sequences (50 Hz Units) SIZE 034 UNITS COOLING Lead Circuit Lag Circuit Active Percent STAGE Unloader Unloader Unloader Cyls Capacity Comp 1 Comp 2 SIZE 044 UNITS COOLING Lead Circuit Lag Circuit Active Percent STAGE Unloader...

  • Page 71: Troubleshooting

    TROUBLESHOOTING until the display reads STBY YES or STBY NO. If display reads STBY NO, press to place the unit in Standby ENTER By using the accessory keypad and display module and the mode. If display reads STBY YES, the unit is already in the status function, actual operating conditions of the unit are dis- Standby mode.

  • Page 72: Single Circuit Stoppage

    Single Circuit Stoppage — c. Check the programming of the schedule function to If a single circuit stops, see if occupied or unoccupied set point should be in there are several potential causes: effect. 1. Open contacts in the compressor high-pressure switch. NOTE: To disable unit operation, press and put the 2.
  • Page 73 and compressor, an alarm for that compressor will be indicated. Alarm Code 59 (Supply-Air Thermistor Failure) — If the This will only affect that circuit; the other circuit will continue temperature measured by this thermistor is outside the range of to operate.
  • Page 74 Automatic ated, or the IAQ priority is configured as low and the IAQ sensor reading exceeds the IAQ set point. LEGEND — Carrier Comfort Network — Constant Volume DSIO — High-Voltage Relay Module — Indoor-Air Quality NTFC — Nighttime Free Cool PSIO —...
  • Page 75 Alarm Code 60 (Return-Air Thermistor Failure) — If the Alarm Code 72 (Loss of Communications With DSIO2) — temperature measured by this thermistor is outside the range of If communication is lost with the DSIO2 module, all outputs –40 to 245 F (–40 to 118 C), the cooling capacity algorithm controlled by this module will be turned off.

  • Page 76: Thermistor Troubleshooting

    is at low speed, the speed will be set to high and the 5 minute Alarm Code 93 (Linkage Failure — DAV System Only) — timer will be restarted. The fan will be locked on high speed A linkage failure alarm is generated when the linkage until the saturated suction temperature exceeds 65 F.
  • Page 77 The microprocessor has been programmed to check the op- 2. Check the thermistor calibration at a known tempera- eration of the thermistors. If the measured temperature is out- ture by measuring actual resistance and comparing the side the range of –40 to 245 F (–40 to 118.3 C) and 168,250 to value measured with the values listed in the thermistor 203.75 ohms (outdoor-air temperature, supply-air temperature, tables (Tables 59 and 60).
  • Page 78 Table 60 — Thermistor Resistance vs Temperature Values for Space Temperature Thermistors T-55 and T-56 (10 K at 25 C Resistors) TEMP RESISTANCE TEMP RESISTANCE TEMP RESISTANCE TEMP RESISTANCE (Ohms) (Ohms) (Ohms) (Ohms) 24051 14101 8563 23456 13775 8378 5369 22877 13457 8197...
  • Page 79 074, 078 NOTE: Blank coils are included on size 054, 064 units only for relative position. Detail is provided for coils where thermistors are located. Fig. 40 — Thermistor T3 and T4 Locations, Size 054-104 Units; Header End of Coil...

  • Page 80: Transducer Troubleshooting

    088, 104 Fig. 40 — Thermistor T3 and T4 Locations, Size 054-104 Units; Header End of Coil (cont) 2. Make sure that the transducer leads are properly con- Transducer Troubleshooting — The unit control nected in the junction box and to the PSIO1. Check the system may use transducers to measure pressures around the transformer TRAN4 output.

  • Page 81: Control Modules

    Table 61 — Refrigerant Pressure should always be blinking when power is on. It indicates Transducer Configuration modules are communicating properly. If green LED is not blinking, check red LED. If red LED is normal, check module KEYPAD ACTION BEING address switches.
  • Page 82 LEGEND CB — Circuit Breaker Fig. 44 — COMM1 Communications Bus Plug Fig. 42 — Module Address Selector Locations LEGEND PWR — Power Fig. 45 — Processor Module (PSIO1) LEGEND HSIO — Keypad and Display Module (Local Interface Device) Fig. 43 — Sensor Bus Wiring (Communications)

  • Page 83: Control Options Module (Psio2)

    CONTROL OPTIONS MODULE (PSIO2) — See Fig. 47. 11. Motormaster® (Stage 1) controls (size 088 and The options module controls the following features: 104 only). 1. Relative humidity sensor. This feature requires a field- 12. External alert signal contact (size 088 and 104 only). supplied, 4-wire, 2 to 10 v RH (relative humidity) ACTUATORS —...

  • Page 84: Economizer Actuator

    When operating with the factory-standard PIC con- VFDs. The VFD model number is TOSVERT130-E3. These trols, the VFD’s internal PID logic feature is disabled. VFDs are specially modified for use on Carrier equipment. Some specifications and control configuration defaults for SUPPLY FAN MOTOR OVERLOAD PROTECTION —...
  • Page 85 CARRIER FACTORY DEFAULT VALUES — The VFDs have been specially programmed for use in Carrier units for both general Carrier use and for the specific unit. Tables of default values contained in the VFD Operation Manual includ- P24 RES RR S4 RCH P24 LOW LOW ed in the installation packet will NOT APPLY to this unit.

  • Page 86: Quick Test

    Press and TST CMPL will be displayed, ending ENTER defaults to the general Carrier use values. These are stored in the quick test. an OPTION ROM (read-only memory chip). However, some variables may need to be manually changed to match the spe- cific unit’s factory default settings.

  • Page 87: Forcing Values

    (Inputs) — The factory/field test of inputs function dis- after the fan is enabled and prior to energizing the first selected plays the current sensor input value (analog type) or status heat stage. (discrete type). During the inputs portion of the quick test, the NOTE: Any selected heat stage causes that stage to be selected compressors and fan motors will not operate.
  • Page 88 (Factory configuration) — This subfunction allows for configuration of user options. Table 69 shows the particular factory configuration of the unit size, type, and options. Under factory and user configurations that are factory set. this subfunction, there are a minimum of 7 configuration fields The majority of user configuration items are self-explanato- that are configured at the factory.
  • Page 89 Refer to Carrier Comfort Network prod- (Service/Maintenance alert) — This is used to read uct literature for more information on configurations.
  • Page 90 Table 68 — Service Directory SERVICE Subfunction Keypad Entry Display Description LOG ON Enter password followed by ENTER LOG ON/OFF LOGGEDON Logged on okay ENTER LOG OFF Press to log off ENTER LOGD OFF Logged off okay ENTER VERSION Software version number SOFTWARE VERSION 500054XX...
  • Page 91 Table 68 — Service Directory (cont) SERVICE (cont) Subfunction Keypad Entry Display Description USER CFG User configuration USER CONFIGURATION Humidity sensors (0 = None, 1 = Differential [2 Sensors], HUSN X 2 = Space Override [1 Sensor]) SUSN X Suction sensors (0 = No, 1 = Yes) VENT X Ventilation control (0 = MDP, 1 = IAQ, 2 = CFM, 3 = All) MMAS X...
  • Page 92 Table 68 — Service Directory (cont) SERVICE (cont) Subfunction Keypad Entry Display Description PES1 X (034-078) Power exhaust set point 1 ECONOMIZER PES X (088,104) (cont) PES2 X Power exhaust set point 2 (Sizes 034-078 Only) SMR X Submaster reference value SMR X Submaster reference value forced (40 to 120) ENTER...
  • Page 93 Table 68 — Service Directory (cont) SERVICE (cont) Subfunction Keypad Entry Display Description IVL X IAQ voltage low point IAQ/CFM (cont) IRL X IAQ reference low point IVH X IAQ voltage high point IRH X IAQ reference high point IQMX X IAQ maximum damper position (0 to 100%;...
  • Page 94 Table 68 — Service Directory (cont) SERVICE (cont) Subfunction Keypad Entry Display Description ORHH X Outdoor air relative humidity high alert limit X ALERT LIMITS SPL X Static pressure low alert limit X (cont) SPH X Static pressure high alert limit X BPL X Building pressure low alert limit X BPH X...
  • Page 95 Table 69 — Factory/Field Configuration Procedure KEYPAD ENTRY DISPLAY COMMENTS LOG ON Must enter password LOGGEDON ENTER Factory configuration FACT CFG Unit type — Enter correct value TYPE VAV CV = 0, VAV = 1 TYPE X ENTER SIZE 34 Unit size —...

  • Page 96: Test Function

    Table 69 — Factory/Field Configuration Procedure (cont) KEYPAD ENTRY DISPLAY COMMENTS USER CFG User configuration Humidity sensors; Default = No (0 = No,1 = Differential [2 sensors], HUSN 0 2 = Space Override [1 sensor]) SUSN NO Suction sensors (Enter value) SUSN X 0 = No, 1 = Yes ENTER...
  • Page 97 Table 70 — Test Directory TEST Subfunction Keypad Entry Display Expansion (Press key) 1 INPUTS INPUTS FACTORY/FIELD TEST OF INPUTS CSA1 X COMPRESSOR A1 STATUS X CSB1 X COMPRESSOR B1 STATUS X CFA1 X COMPRESSOR A1 SAFETY X CFB1 X COMPRESSOR B1 SAFETY X CFA2 X COMPRESSOR A2 SAFETY X...
  • Page 98 Table 70 — Test Directory (cont) TEST (cont) Subfunction Keypad Entry Display Expansion (Press key) ANLGOUT FACTORY/FIELD TEST OF ANALOG OUTPUTS ANALOG IGV (034-078) OUTPUTS INLET GUIDE VANES TEST INV (088,104) IGV TEST (034-078) TESTING INLET GUIDE VANES ENTER INV TEST (088,104) ECON ECONOMIZER TEST ECON TST...
  • Page 99 Table 70 — Test Directory (cont) TEST (cont) Subfunction Keypad Entry Display Expansion (Press key) POWER EXHAUST/RETURN DAMPER TEST PERD (034-078) DISCRETE OUTPUTS TESTING EXHAUST/RETURN DAMPER PERD TST (cont) ENTER (034-078) COMPRSR FACTORY/FIELD TEST OF COMPRESSOR COMPRESSOR TESTS CPA1† COMPRESSOR A1 TEST CPA1 TST TESTING COMPRESSOR A1** ENTER...
  • Page 100 Fig. 51 — Typical Wiring Schematic (Sizes 054-078 Shown)
  • Page 101 Fig. 52 — Typical Control Wiring (Sizes 054-078 Shown)
  • Page 102 Fig. 52 — Typical Control Wiring (Sizes 054-078 Shown) (cont)

  • Page 103: Tables 034-078

    APPENDIX A INPUT/OUTPUT TABLES, CHANNELS 1-18 (PSIO1) — SIZES 034-078 PSIO1 TERMINAL ID SIGNAL TYPE POINT NAME — ASSIGNMENT Channel – Type Level Inputs Thermistor, 5K SAT — Supply Air Temp J7-2 J7-3 Analog Varies* Thermistor, 5K RAT — Return Air Temp J7-5 J7-6 Analog...
  • Page 104 APPENDIX A (cont) INPUT/OUTPUT TABLES, CHANNELS 31-48 (PSIO2) — SIZES 034-078 PSIO2 TERMINAL ID SIGNAL TYPE POINT NAME — ASSIGNMENT Channel No. – Type Level Inputs J7-2 J7-3 Analog Varies* Thermistor, 5K STA — Suction Gas Temperature, Ckt 1 J7-5 J7-6 Analog Varies*...

  • Page 105: Tables 088,104

    APPENDIX B INPUT/OUTPUT TABLES — CHANNELS 1-18 (PSIO1) — SIZES 088 AND 104 PSIO1 TERMINAL ID SIGNAL TYPE ASSIGNMENT Channel – Type Level Inputs J7-2 J7-3 Analog Varies* Thermistor, 5K SAT — Supply-Air Temperature J7-5 J7-6 Analog Varies* Thermistor, 5K RAT —...
  • Page 106 APPENDIX B (cont) INPUT/OUTPUT TABLES — CHANNELS 31-48 (PSIO2) — SIZES 088 AND 104 PSIO2 TERMINAL ID SIGNAL TYPE ASSIGNMENT Channel – Type Level Inputs J7-2 J7-3 Analog Varies* Thermistor, 5K STATHERM — Suction Gas Thermistor, Circuit A J7-5 J7-6 Analog Varies* Thermistor, 5K...

  • Page 107: Appendix C - Ccn Points List

    APPENDIX C — CCN Points List READ/WRITE DISPLAY FORMAT/ EXPANDED NAME TABLE NAME POINT NAME PROPERTIES ENGINEERING UNITS Space Temperature –10 to +245 F Supply Air Temperature –10 to +245 F Return Air Temperature –10 to +245 F CLSP Control Set Point CCAP Cooling Percentage Total Capacity 0 to 100%...
  • Page 108 APPENDIX C — CCN Points List (cont) READ/WRITE DISPLAY FORMAT/ EXPANDED NAME TABLE NAME POINT NAME PROPERTIES ENGINEERING UNITS STATUS04 HHOVR High Humidity Override no/yes (cont) IAQCL IAQ/Outdoor Air CFM Ctrl† no/yes CPSA1 Compressor A1 Status on/off CPFA1 Compressor A1 Safety alarm/norm CMPA1 Compressor A1...

  • Page 109: Appendix D - Bacnet Points List

    APPENDIX D — BACnet Points List BACnet BACnet BACnet BACLink DISPLAY FORMAT/ TABLE POINT OBJECT EXPANDED NAME OBJECT OBJECT DEFAULT ENGINEERING UNITS NAME NAME NAME TYPE PROPERTIES TEMPLATE Space Temperature –10 to +245 F Supply Air Temperature –10 to +245 F Return Air Temperature –10 to +245 F Supply Fan Status...
  • Page 110 APPENDIX D — BACnet Points List (cont) BACnet BACnet BACnet BACLink DISPLAY FORMAT/ TABLE POINT OBJECT EXPANDED NAME OBJECT OBJECT DEFAULT ENGINEERING NAME NAME NAME TYPE PROPERTIES TEMPLATE UNITS OHSP OHSP Occupied Heat Set Point 55 to 80 F OCSP OCSP Occupied Cool Set Point 55 to 80 F...

  • Page 111: Parameter Values

    1* (054-104 only) Gr.Ut (Utility) Fnod bLPn *These settings differ from the VFD manufacturer defaults and are required for Carrier applications. NOTE: To restore original factory settings, change tYP to 6 in Setup mode (SetP). This restores the VFD original factory settings.
  • Page 112 CALL FOR FREE CATALOG 1-800-962-9212 [ ] Packaged Service Training [ ] Classroom Service Training Copyright 1999 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. PC 111 Catalog No.

  • Page 113: Start-Up Checklist

    START-UP CHECKLIST MODEL NO.: SERIAL NO.: DATE: TECHNICIAN: I. PRE-START-UP: VERIFY THAT UNIT IS LEVEL VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT LOOSEN ALL SHIPPING HOLDDOWN BOLTS AND REMOVE SHIPPING BRACKETS PER INSTRUCTIONS VERIFY THAT COMPRESSOR SUSPENSION SPRINGS HAVE BEEN LOOSENED PER INSTRUCTIONS VERIFY OPENING OF ECONOMIZER HOOD VERIFY INSTALLATION OF EXHAUST HOOD VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS...
  • Page 114 III. PRELIMINARY CHECKLIST ITEMS (cont) CHANGES TO DEFAULT VALUES RECORD ALL CHANGES MADE TO FACTORY DEFAULT VALUES IV. START-UP CHECK EVAPORATOR FAN SPEED AND RECORD. __________ CHECK CONDENSER FAN SPEED AND RECORD. __________ AFTER AT LEAST 10 MINUTES RUNNING TIME, RECORD THE FOLLOWING MEASUREMENTS: COMP A1 COMP A2 COMP B1...
  • Page 115 CONTROL CONFIGURATION KEYBOARD DESCRIPTION DISPLAY ENTRY VALUES IN [ ] INDICATE FACTORY DEFAULTS LOG ON Enter password followed by ENTER LOGGEDON Logged on okay ENTER FACT CFG Factory configuration TYPE X Unit type (0 = CV, 1 = VAV) [Default is 1] Verify unit type and change if necessary.
  • Page 116 SMG 8.0 Set SMG to 8.0 [–7.5] ENTER NOTES: Copyright 1999 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. PC 111 Catalog No. 534-738 Printed in U.S.A.

This manual is also suitable for:

JpNp034-07450fbFpJbNb ... Show all

Table of Contents