Carrier 48/50PG C03-14 Operation And Service Manual

Carrier 48/50PG C03-14 Operation And Service Manual

Single package rooftop units with comfortlink controls version 5.x and puron (r-410a) refrigerant
Table of Contents

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COMFORT
R
IMPORTANT: This literature covers 48/50PG03−14 and
48/50PM16−28 models with Comfortlink Software version 5.x.
The 48/50PG C16−28 (15 – 25 ton) model reference has been
removed from this manual; however version 5.x software is
backward compatible with all Comfortlink PG models. Refer to
past manuals for obsolete model information.

TABLE OF CONTENTS

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ComfortLinkt Control
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START−UP
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Compressor Mounting
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Return−Air Filters
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Outdoor−Air Inlet Screens
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CONTROLS QUICK SET−UP
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Space Temperature Sensor Control − Direct Wired
(T−55 or T−56 or T−59)
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T−58 Communicating Room Sensor
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System Pilot − Communication Space Sensor
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Thermidistat Control
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Table of Contents
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Summary of Contents for Carrier 48/50PG C03-14

  • Page 1 EnergyX Adaptive Fan Temperature Compensated Start ....Carrier Comfort Network (CCN)R Configuration Demand Limit Linkage Alarm Handling ... . .
  • Page 2: Table Of Contents

    Accessory Navigatort Display ..... . . Carrier Comfort Network (CCN)R Interface EnergyX ........
  • Page 3: General

    The ComfortLink control is a comprehensive unit-management system. The control system is easy to access, configure, diagnose and troubleshoot. The ComfortLink control is fully communicating and cable-ready for connection to the Carrier Comfort Network (CCN) building management system. control communications for remote monitoring via the Internet. Multiple units can be linked together (and to other ComfortLink control equipped units) using a 3-wire communication bus.
  • Page 4: Accessory Navigator Display

    The Pilot devices can be used to install and commission a 3V zoning system, linkage compatible air source, universal controller, and all other devices operating on the Carrier communicating network. Additionally, the System Pilot device can serve as a wall-mounted temperature sensor for space temperature measurement.
  • Page 5 Table 2 – Scrolling Marquee Mode and Menu Display Structure ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ NAVIGATE/ EXIT SCROLL Fig. 3 − System Pilott User Interface Force Hierarchy There is a hierarchy in CCN with regards to forcing a point. Programs and devices write a force at different priority levels.
  • Page 6: Conventions Used In This Manual

    Conventions Used in This Manual The following conventions for discussing configuration points for the local display (Scrolling Marquee or Navigator accessory) will be used in this manual. Point names will be written with the Mode name first, then any submodes, then the point name, each separated by an arrow symbol (→).
  • Page 7 CONTROL BOX COMPRESSOR ELECTRICAL OPTIONS PANEL OUTDOOR AIR SCREEN (HIDDEN) BASEPAN CONNECTIONS ACCESS PANEL Fig. 4 − 48/50PG03−14 Size Units, Panel and Filter Locations (48PG03−07 Unit Shown) OUTDOOR AIR SCREEN (HIDDEN) PEM 1 & 2 CONTROL BOX CONVENIENCE OUTLET Fig. 5 − 48/50PM16−28 Size Units, Panel and Filter Locations (48PM24 Unit Shown) FILTER ACCESS DOOR CO SENSOR FILTER ACCESS...
  • Page 8: Condenser Fans And Motors

    2000 to 7000 ft. For elevations above 7000 ft, refer to High Altitude section to identify the correct orifice size for the elevation. Purchase these orifices from your local Carrier dealer. Follow instructions in accessory Installation Instructions to install the correct orifices.
  • Page 9: T−58 Communicating Room Sensor

    Space Temperature Sensor Control − Direct Wired (T−55 or T−56 or T−59) Wire accessory space temperature sensor(s) to the T-55 terminals on the field connection terminal board located at the unit control box. Refer to Field-Installed Accessories section for additional information.
  • Page 10: Programming Operating Schedules

    NOTE: On standard units, the fire shutdown input is the terminals Fire Shutdown 1 and 2. On Humidi-MiZer units, the fire shutdown connections are at PL19. Outdoor Enthalpy If an Outdoor Enthalpy accessory was field installed, the unit must be configured for it by setting Configuration→ECON→EN.SW, identifies the normally open or normally closed status of this input when the outdoor enthalpy is low.
  • Page 11 Table 3 – Setting an Occupied Time Schedule — Weekdays Only for 7:30 to 22:30...
  • Page 12: Service Test

    SERVICE TEST The Service Test function can be used to verify proper operation of compressors, heating stages, Humidi−MiZert System, indoor fan, outdoor fans, power exhaust fans, economizer, crankcase heaters, and the alarm relay. Use of Service Test is recommended at initial system start up and during troubleshooting (See Table 4 for point details).
  • Page 13: Heating Test

    Heating Test The heating (HEAT) submenu is used to change output status for the individual heat stages, gas or electric. The fans (FANS) and cooling (COOL) service test outputs are reset to OFF for the heating service test. Indoor and outdoor fans are controlled normally to maintain proper unit operation.
  • Page 14: Economizer Monitoring

    Fig. 8 − 48PG/PM Humidi−MiZert − Third Party Smoke Detector Wiring Economizer Monitoring On field terminal board (TB1), terminals 8, 9, and 10 can be used to monitor economizer position from a third party control system. See economizer operation section for additional information. NOTE: Terminal 8 will not represent economizer position if the unit is equipped with Adaptive Fan.
  • Page 15: Modes

    Thermostat Control Type (T.CTL) This configuration applies only if Unit Control Type is Thermostat (Configuration→Unit→U.CTL = 2). The value determines alternative cooling and Humidi-MiZer circuit staging. See the Cooling and Humidi-MiZer sections for more information. The factory default value is T.CTL = 0 (Adaptive). Fan On When Occupied (OC.FN) This configuration applies only if Unit Control Type is Space Sensor (Configuration →Unit→U.CTL = 3).
  • Page 16: General Operation

    HVAC Operation Disabled (HV.DN) Allow disabling of HVAC mode. This is only available on a network connection and shows if the unit has been forced into the disabled status. Cool Setpoint In Effect (EFF.C) This shows the actual setpoint that is being used for control during cooling mode.
  • Page 17: Occupancy Determination

    Occupancy Determination The building’s occupancy is affected by a number of different factors. When the unit is operating with a space temperature sensor (T−55, T−56, T−58 or T−59), occupancy affects the unit set points and the operation of the economizer. If the unit is operating under thermostat control, occupancy only affects the operation of the economizer.
  • Page 18: Cooling Operation

    Cooling Operation The 48/50PG and 48/50PM unit’s cooling operation consists of: demand, mode determination, staging request to satisfy the demand, and handling a request with the unit’s resources. These resources can include compressors, an economizer, and a reheat coil. This section covers mechanical cooling. For economizer and reheat cooling, refer to the Economizer and Humidi−mizert sections, respectively.
  • Page 19 Space Sensor Control Space sensor staging control is an adaptive anticipation control that weighs the actual space demand against the trend of that demand and the trend of the supply air. It also honors stage time guards and supply air limits. The demand for cooling in the space is displayed as the Cooling Demand (Run Status→COOL →DMD.C).
  • Page 20 For 48/50PG03−07 units, one outdoor fan is controlled in all modes by the MotormasterR sensing on circuit A. For 48/50PG08−14 units, 2 outdoor fans are controlled in all modes by the Motormaster sensing on circuit A. For 48/50PG16 units, 3 outdoor fans are controlled in normal cooling and sub−cooling Reheat1 modes by the Motormaster sensing circuit A.
  • Page 21: Heating Operation

    Heating Operation The 48/50PG and 48/50PM unit’s heating operation consists of: demand, mode determination, staging request to satisfy the demand, and handling a request with the unit’s resources. These resources can be gas heat or electric heat. This section covers both gas heat units and electric heat units.
  • Page 22 Space Sensor Control Space sensor staging control is an adaptive anticipation control that weighs the actual space demand against the trend of that demand. It also honors stage time guards and supply air limits. The demand for heating in the space is displayed as the Heating Demand (Run Status→HEAT→DMD.H).
  • Page 23: Economizer

    Economizer If an economizer is installed, then Economizer Installed configuration (Configuration→UNIT→EC.EN) should be set to YES. The economizer is controlled by the economizer output signal (Outputs→ECON→EC.CP) on the ECB control. If the indoor fan is off or the building is unoccupied, the economizer position is zero. If in Occupied mode and the unit is heating or cooling and the economizer cannot provide free cooling, the economizer position is the configured economizer minimum position (Configuration→ECON→EC.MN)
  • Page 24: Optional Humidi−Mizert Dehumidification System

    Free Cool PreOcc Time (FC.TM) FC.TM is the configuration that determines how many minutes before occupancy that free cooling can occur when set for Preoccupancy (UEFC = 2). Free Cool Low Temp Limit (FC.LO) Unoccupied free cooling cannot occur if the Outdoor Air Temperature (Temperature→...
  • Page 25 Table 10 – Control Modes with Humidi−MiZert System Output and Valve States versus Circuit Mode .x = Circuit A, B, or C identifier RH2.x COND COIL COMP OUTDOOR AIR CLOSED VALVE OPEN VALVE 3-WAY VALVE Fig. 9 − Normal Cooling Mode — Humidi−MiZert System RH1.x HUMIDI-MIZER COIL CV.x...
  • Page 26 RH2.x COND COIL COMP OUTDOOR AIR CLOSED VALVE OPEN VALVE 3-WAY VALVE Fig. 10 − Subcooling Mode (Reheat1) — Humidi−MiZert System RH2.x COND COIL COMP OUTDOOR AIR CLOSED VALVE OPEN VALVE Fig. 11 − Hot Gas Reheat Mode (Reheat2) — Humidi−MiZer System RH1.x HUMIDI-MIZER COIL CV.x...
  • Page 27 RH2.x COND COIL COMP OUTDOOR AIR CLOSED VALVE OPEN VALVE 3-WAY VALVE Fig. 12 − Normal Cooling Mode — Humidi−MiZert System RH2.x COND COIL COMP OUTDOOR AIR CLOSED VALVE OPEN VALVE 3-WAY VALVE Fig. 13 − Subcooling Mode (Reheat1) — Humidi−MiZer System RH1.x HUMIDI-MIZER COIL EVAP COIL...
  • Page 28 RH2.x COND COIL COMP OUTDOOR AIR CLOSED VALVE OPEN VALVE 3-WAY VALVE Fig. 14 − Hot Gas Reheat Mode (Reheat2) — Humidi−MiZert System Reheat Control The cooling staging and compressor control routines are responsible for controlling each circuit in one of the three sub−modes (Cool, Reheat1, or Reheat2).
  • Page 29 Reheat Mode Diagnostic Help The status of reheat mode sensor inputs may be viewed within the display Inputs menu. The status of reheat mode outputs may be viewed within the display Outputs or Run Status→COOL menus. Additional diagnostic help, including status of circuit reheat temperature limit lockouts may be viewed within the Humidi-MiZer...
  • Page 30: Indoor Air Quality (Iaq)

    Fig. 17 − Humidi−MiZer System Valve Locations 48/50PM16−28 Air Baffles The units with Humidi-MiZert option are equipped with Motormaster control to maintain adequate discharge pressure for proper unit operation during low ambient operation. This becomes especially critical in the Reheat2 mode of operation. Wind could have a detrimental effect depending on the orientation and the expected design latent load of the space.
  • Page 31 Fig. 18 − Air Baffle Dimensions 48/50PG03−16...
  • Page 32 Fig. 19 − Air Baffle Dimensions 48/50PM16−28...
  • Page 33 ECONOMIZER MINIMUM DAMPER POSITION (EC. MN) MINIMUM DAMPER POSITION (AQ. MN) DIFFERENTIAL LOW (AQD.L) IA.CF = 3 (Control Minimum Position) When IA.CF = 3, an external 4 to 20 mA source is used to set the minimum position. The 4 mA signal corresponds to 0% and the 20 mA signal corresponds to 100%.
  • Page 34: Energyx

    Fan Enable (Analog IAQ Sensor) The DCV algorithm will operate whenever the building is occupied and the indoor fan is operating or whenever the IAQ algorithm has caused the indoor fan to operate. The configuration Configuration→AIR.Q→IA.FN (Fan determines whether or not the IAQ algorithm can turn on the indoor fan.
  • Page 35: Temperature Compensated Start

    Carrier Comfort Network (CCN)R Configuration It is possible to configure the ComfortLink control to participate as an element of the Carrier Comfort Network (CCN) system directly from the local display. This section will deal with explaining the various programmable options which are found under the CCN sub-menu in the Configuration mode.
  • Page 36: Linkage

    Global Schedule Broadcast (BROD"B.GS) If this configuration is set to ON and the schedule number (SCH.N) is between 65 and 99, then the control will broadcast the internal time schedule once every 2 minutes. CCN Broadcast Acknowledger (BROD"B.ACK) If this configuration is set to ON, then when any broadcasting is done on the bus, this device will respond to and acknowledge.
  • Page 37: Alarm Handling

    This synchronization of data optimizes the efficiency of the unit and the zones to operate at peak system performance at all times. This information can be seen in linkage maintenance tables of the Linkage Coordinator and the RTU; it is updated at approximately 1−minute intervals.
  • Page 38 Alarms"R.HIST (Reset Alarm History) Change to YES to reset the alarm history. Turning unit power off will not reset the alarm history. Alarms"CURR (Currently Active Alarms) Use the ENTER key, then scroll through any alarm numbers using the up and down arrow keys. Alarms are displayed in numerical order.
  • Page 39 Alert Code T075 − Supply Air Temperature Thermistor Failure This alert occurs when the temperature is outside the range –40_ to 240_F (–40_ to 116_C). Economizer cooling and adaptive compressor staging cannot occur while this alarm is active. This alert resets automatically. The cause of the alert is usually a faulty thermistor, a shorted or open thermistor caused by a wiring error, or a loose connection.
  • Page 40 Alarm Code T153 − Real Time Clock Hardware Failure The alert occurs when the RTC clock chip on the MBB is not responding. Time and date functions will not operate, such as local occupancy schedules. The unit will default to 24/7 unoccupied mode.
  • Page 41: Comfortlinkt Alarm Codes

    Table 12 – ComfortLinkt Alarm Codes...
  • Page 42 Table 12 — ComfortLinkt Alarm Codes (cont)
  • Page 43: Fan Status Switch Off/Fan Contactor On

    S Fan Status Switch Off, Fan Contactor On This alert occurs when the fan status switch has sensed that the indoor fan has been off for 10 seconds and the indoor fan feedback has determined that the indoor fan should be on. Because the Fan Status switch can be configured normally opened or closed, the switch might be open or closed.
  • Page 44: Control Module Communication

    (TB). Yellow LED The MBB has one yellow LED which is used to indicate CCN communication activity. The Carrier Comfort Network (CCN) LED will blink during times of network communication. Communication Failures If the Scrolling Marquee or Navigator display Communication Failure or the green or yellow LED’s do not flash on the boards...
  • Page 45: Cooling Troubleshooting

    Cooling Troubleshooting Use the Scrolling Marquee display or a CCN device to view the cooling status display and the cooling diagnostic display (see Appendix A) for information on the cooling operation. Check the current alarms and alarm history for any cooling alarm codes and correct any causes.
  • Page 46: Humidi−Mizert Troubleshooting

    Humidi−MiZert Troubleshooting Use the unit Scrolling Marquee display or a CCN device to view the cooling status display and the cooling diagnostic display (see Appendix A) for information on the cooling operation and the related Humidi-MiZer operation. Check the current alarms and alarm history for any cooling alarm codes and correct any causes.
  • Page 47: Economizer Troubleshooting

    Economizer Troubleshooting Use the unit Scrolling Marquee display or a CCN device to view the economizer status display and the economizer diagnostic display (see Appendix A) for information on the economizer operation. Check the current alarms and alarm history for any economizer alarm codes and correct any causes.
  • Page 48: Heating Troubleshooting

    Heating Troubleshooting Use the unit Scrolling Marquee display or a CCN device to view the heating status display and the heating diagnostic display (see Appendix A) for information on the heating operation. Check the current alarms and alarm history for any heating alarm codes and correct any causes.
  • Page 49 LEGEND IDM -- Induced-Draft Motor IGC -- Integrated Gas Unit Controller NOTE: Thermostat Fan Switch in the “AUTO” position. Fig. 21 − IGC Service Analysis Logic...
  • Page 50 Table 18 – IGC Board LED Alarm Codes — — — Table 19 – Electric Heat Service Analysis — Comfort  Comfort Comfort Comfort Comfort Comfort Comfort Comfort...
  • Page 51: Phase Loss Protection

    Phase Loss Protection The phase loss protection option will monitor the three-phase electrical system to provide phase reversal and phase loss protection. Phase Reversal Protection If the control senses an incorrect phase relationship, the relay (K1) will be de-energized (opening its contact). If the phase relationship is correct, the relay will be energized.
  • Page 52: Transducer Troubleshooting

    48/50PG03,04 Fig. 23 − Saturated Condensing Temperature Thermistor Location — 48/50PG03−07 THERMISTOR LOCATION (SCT.B) 48/50PG08-12 Fig. 24 − Saturated Condensing Temperature Thermistor Location — 48/50PG08−14 Sensor Trim Corrective offsets can be applied to the space temperature and the supply air temperature sensor readings. These corrections are set in the Configuration→TRIM menu for the display, or in the Maintenance→TRIM table for CCN.
  • Page 53 Table 20 – Temperature (_F) vs Resistance/Voltage Drop Values for OAT, SAT, and SPT Thermistors (10K at 25_C Type II Resistors)
  • Page 54 Table 21 – Temperature (_F) vs. Resistance/Voltage Drop Values for SCT Sensors (5K at 25_C Resistors)
  • Page 55: Major System Components

    Table 22 – Pressure (psig) vs. Voltage Drop Values for Suction Pressure Transducers MAJOR SYSTEM COMPONENTS General The 48/50PG and 48/50PM single package rooftop units contain the ComfortLink electronic control system that monitors all operations of the rooftop. The control system is composed of several main control components and available factory- installed options or field-installed accessories as listed in sections below.
  • Page 56 Fig. 25 − 48PG03−16 Control Wiring Schematic...
  • Page 57 Fig. 26 − 50PG03−16 Control Wiring Schematic...
  • Page 58 Fig. 27 − Typical 48/50PG03−14 Power Wiring Schematic and Legend (48/50PG08−14 Shown)
  • Page 59 Fig. 28 − Typical 48PG03−16 with Humidi−MiZert System Control Wiring Schematic(48PG08−16 Shown)
  • Page 60 Fig. 29 − Typical 50PG03−16 with Humidi−MiZert System Control Wiring Schematic(50PG08−16 Shown)
  • Page 61 Fig. 30 − Typical 48/50PG03−14 with Humidi−MiZert System Power Wiring Schematic and Legend (48/50PG08−14 Shown)
  • Page 62 Fig. 31 − Typical 48PM16−28 Control Schematic...
  • Page 63 Fig. 32 − Typical 48PM16−28 with Humidi−MiZert System Control Schematic...
  • Page 64 Fig. 33 − Typical 50PM16−28 Control Schematic...
  • Page 65 Fig. 34 − Typical 50PM16−28 with Humidi−MiZert Control Schematic...
  • Page 66 Fig. 35 − Typical 48/50PM16−28 Power Schematic...
  • Page 67 Fig. 36 − Typical 48/50PM16−28 with Humidi−MiZert System Power Schematic...
  • Page 68 Fig. 37 − Typical 48/50PG03−16 Unit Component Arrangement (Sizes 03−07 Shown)
  • Page 69 Fig. 38 − 48/50PM16−28 Component Arrangement...
  • Page 70 Fig. 39 − 48/50PM16−28 with Humidi−MiZert Component Arrangement...
  • Page 71: Main Base Board (Mbb)

    NOTE: The Main Base Board (MBB) has a 3-position instance jumper that is factory set to ‘1.’ Do not change this setting. YELLOW LED - CCN (CARRIER COMFORT NETWORK) Fig. 40 − Main Base Board (MBB) INSTANCE JUMPER (SET TO 1)
  • Page 72 Table 23 – MBB Connections...
  • Page 73: Economizer Control Board (Ecb)

    Economizer Control Board (ECB) The ECB controls the economizer actuator. (See Fig. 41 and Table 24.) The control signal from the ECB uses either the MFT (Multi-Function Technology) digital communication protocol or a 4 to 20 mA output signal as defined by the configuration Configuration→ECON→E.CTL.
  • Page 74 Table 24 – ECB Connections...
  • Page 75: Integrated Gas Control (Igc) Board

    Integrated Gas Control (IGC) Board The IGC is provided on gas heat units. (See Fig. 42 and Table 25.) The IGC controls the direct spark ignition system and monitors the rollout switch, limit switch, and induced-draft motor Hall Effect switch. The IGC is equipped with an LED (light-emitting diode) for diagnostics.
  • Page 76: Low Voltage Terminal Strip (Tb1)

    SEPARATION OF CIRCUITS TO EACH 24V TRANSFORMER MUST BE MAINTAINED The circuit breakers for the low voltage control transformers, interface connection for the Carrier Comfort Network (CCN) communication, and interface connection for the Local Equipment Network (LEN) communications are also located on the low voltage terminal strip.
  • Page 77: Scrolling Marquee Display

    4. The RJ14 CCN connector on TB1 can also be used, but is only intended for temporary connection (for example, a laptop computer running Carrier network software). 5. Restore power to unit. IMPORTANT: A shorted CCN bus cable will prevent some routines from running and may prevent the unit from starting.
  • Page 78 AIR DISTRIBUTION-DIGITAL AIR VOLUME CONTROL (DAV) Fig. 46 − CCN System Architecture ROOFTOP UNIT ROOFTOP UNIT LEGEND CCN -- Carrier Comfort Networkr CL -- ComfortLinkt Controls DAV -- Digital Air Volume HVAC -- Heating, Ventilation, and Air Conditoning TCU -- Terminal Control Unit ADDITIONAL...
  • Page 79: Field−Installed Accessories

    Field-Installed Accessories Space Temperature Sensor (T−55) The T-55 space temperature sensor (part no. 33ZCT55SPT) is a field-installed accessory. The sensor is installed on a building interior wall to measure room air temperature. The T-55 sensor also includes an override button on the front cover to permit occupants to override the Unoccupied Schedule (if programmed).
  • Page 80 TB1-T55 TO MAIN BASE BOARD SENSOR 1 TB1-T55 TO MAIN BASE BOARD LEGEND -- Terminal Block ______ -- Factory Wiring _ _ _ _ -- Field Wiring SPACE TEMPERATURE AVERAGING --9 T-55 SENSOR APPLICATION TB1-T55 TO MAIN BASE BOARD T-55 SENSOR 1 TB1-T55 TO MAIN BASE...
  • Page 81 When installing the supply duct SAT, the unit must be configured by setting Configuration→UNIT→SAT.H to ENBL. A SAT sensor in the supply duct is the preferred configuration for systems with Carrier variable volume and temperature (VVT) accessory controls. Space Humidistat The Space Humidistat (part no.
  • Page 82: Service

    Space Humidity Sensor The space relative humidity sensor (part no. 33ZCSENDRH−01 duct mount or 33ZCSENSRH−01 wall mount) is a field−installed accessory. The space relative humidity (RHS) may be selected for use if the outdoor air quality sensor (OAQ) is not used and an economizer board is installed.
  • Page 83 Monthly cleaning with Totaline environmentally sound coil cleaner is essential to extend the life of coils. This cleaner is available from Carrier Replacement parts division as part number P902-0301 for a one gallon container, and part number P902-0305 for a 5 gallon container. It is recommended that all round−tube...
  • Page 84: Lubrication

    Condensate Drain Pan (48/50PM16−28 Units) Check and clean each year at the start of the cooling season. An access panel is located above the condensate connection to allow easy clean out of the condensate pan. The first time the panel is removed, the insulation behind the access panel will need to be cut away.
  • Page 85: Evaporator Fan Service And Replacement

    ROLLOUT SWITCH HEAT EXCHANGER MAIN BURNER SECTION SECTION Fig. 50 − 48PG03−14 Typical Gas Heating Section (48PG03−07 Shown) HEAT EXCHANGER SECTION IGC BOARD (HIDDEN) MAIN BURNER SECTION Fig. 51 − 48PM16−28 Typical Gas Heating Section Condenser and Evaporator−Fan Motor Bearings The condenser-fan and evaporator-fan motors have permanently sealed bearings, so no field lubrication is necessary.
  • Page 86: Evaporator Fan Performance Adjustment

    Evaporator Fan Performance Adjustment (Fig. 52−54) Fan motor pulleys are factory set for speed shown in Appendix D. To change fan speeds: 1. Shut off unit power supply. 2. Loosen nuts on the 4 carriage bolts in the mounting base. Using adjusting bolts and plate, slide motor and remove belt.
  • Page 87: Condenser−Fan Adjustment

    Condenser-Fan Adjustment (Fig. 55) 1. Shut off unit power supply. 2. Remove condenser-fan assembly (grille, motor, motor cover, and fan) and loosen fan hub setscrews. 3. Adjust fan height as shown in Fig. 55. 4. Tighten setscrews and replace condenser-fan assembly. 5.
  • Page 88: Refrigerant Charge

    Refrigerant Charge Amount of refrigerant charge is listed on unit nameplate. Refer to Carrier GTAC II; Module 5; Charging, Recovery, Recycling, and Reclamation section for charging methods and procedures. Unit panels must be in place when unit is operating during charging procedure.
  • Page 89 If the outdoor temperature is low, the Motormaster outdoor fan control device may need to be temporarily bypassed by rewiring the power leads to obtain full speed. R410A RE REFRI RIGERANT RANT OUTDOOR F R FAN M N M UST BE OPERATING ON H dd Cha harge if Abov bove the...
  • Page 90 R R 410A 410A R R E E F F R R I I GE GE R R A A NT AL L L O O UTDO UTDO O O R R F F ANS ANS M M US US T T BE BE RUNNI RUNNI NG 16 0 0...
  • Page 91 Be sure unit is in normal cooling mode by checking that the RH2 solenoid coil(s) and the CRC relay are deenergized (control outputs off). Adjust charge per the charging charts as described in the To Use The Cooling Charging Charts, Standard Unit section. Switch system to run in the dehumidification mode for 5 minutes.
  • Page 92: Main Burners (48Pg And 48Pm)

    High Altitude (48PG and PM) For high altitude applications greater than 2,000 ft the heat input rate should be reduced. The higher the altitude is above sea level, the less oxygen is in the air. See Table 28 for orifice sizing. A high altitude kit is available to convert unit for altitudes up to 7,000 ft.
  • Page 93: Filter Drier

    Replacement Parts A complete list of replacement parts may be obtained from any Carrier distributor upon request. Diagnostic LEDs The MBB, ECB, and IGC control boards have LED lights for diagnostic purposes. The meanings and error codes can be found in the troubleshooting section of this manual.
  • Page 94: Appendix A − Local Display And Ccn Tables

    APPENDIX A — LOCAL DISPLAY AND CCN TABLES MODE — RUN STATUS...
  • Page 95 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — RUN STATUS (cont)
  • Page 96 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — RUN STATUS (cont)
  • Page 97 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — SERVICE TEST MODE — TEMPERATURES AIR.T REF.T MODE — PRESSURES...
  • Page 98 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — SET POINTS SET_PNT MODE — INPUTS INPUTS...
  • Page 99 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — OUTPUTS...
  • Page 100 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — CONFIGURATION DISP UNIT...
  • Page 101 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — CONFIGURATION (cont) COOL...
  • Page 102 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — CONFIGURATION (cont) COOL (cont)
  • Page 103 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — CONFIGURATION (cont) COOL (cont)
  • Page 104 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — CONFIGURATION (cont)
  • Page 105 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — CONFIGURATION (cont) Disable/Enable...
  • Page 106 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — CONFIGURATION (cont)
  • Page 107 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — CONFIGURATION (cont)
  • Page 108 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — TIME CLOCK TIME CCN ONLY TABLES...
  • Page 109 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — OPERATING MODES MODE COOL...
  • Page 110 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — OPERATING MODES (cont) HEAT ECON...
  • Page 111 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (CONT) MODE — OPERATING MODES (cont) OAU (cont) MODE — ALARMS...
  • Page 112 APPENDIX B — CONTROL MODES WITH Humidi−MiZer SYSTEM AND ECONOMIZER Thermostat input shown for cooling demand (versus temperature sensor point). Humidistat dehumidification demand (versus relative humidity sensor and set point). Economizer cooling availability is dependent on temperature or enthalpy. (Thermostat Control Type configuration is ignored) 1-Stage Y1 (Thermostat Control Type configuration = 1) and 2-Stage Y1 (Thermostat Control Type configuration = 2) Digital (Thermostat Control Type configuration = 3)
  • Page 113: Appendix C − Start−Up Data

    APPENDIX C — START−UP DATA Fan Performance — 48PGD03 Vertical Units Fan Performance — 48PGD04 Vertical Units...
  • Page 114 Fan Performance — 48PGE04 Vertical Units Fan Performance — 48PGF04 Vertical Units...
  • Page 115 Fan Performance — 48PGD05 Vertical Units Fan Performance − 48PGE05 Vertical Units...
  • Page 116 Fan Performance — 48PGF05 Vertical Units Fan Performance — 48PGD06 Vertical Units...
  • Page 117 Fan Performance — 48PGE06 Vertical Units Fan Performance − 48PGF06 Vertical Units...
  • Page 118 Fan Performance — 48PGD07 Vertical Units Fan Performance — 48PGE07 Vertical Units...
  • Page 119 Fan Performance — 48PGF07 Vertical Units Fan Performance — 48PGD08 Vertical Units...
  • Page 120 Fan Performance — 48PGE08 Vertical Units Fan Performance — 48PGF08 Vertical Units...
  • Page 121 Fan Performance — 48PGD09 Vertical Units Fan Performance — 48PGE09 Vertical Units...
  • Page 122 Fan Performance — 48PGF09 Vertical Units Fan Performance — 48PGD12 Vertical Units...
  • Page 123 Fan Performance — 48PGE12 Vertical Units Fan Performance — 48PGF12 Vertical Units...
  • Page 124 Fan Performance — 48PGD14 Vertical Units...
  • Page 125 Fan Performance — 48PGE14 Vertical Units...
  • Page 126 Fan Performance — 48PGF14 Vertical Units...
  • Page 127 Fan Performance — 48PGD03 Horizontal Units Fan Performance — 48PGD04 Horizontal Units...
  • Page 128 Fan Performance — 48PGE04 Horizontal Units Fan Performance — 48PGF04 Horizontal Units...
  • Page 129 Fan Performance — 48PGD05 Horizontal Units Fan Performance — 48PGE05 Horizontal Units...
  • Page 130 Fan Performance — 48PGF05 Horizontal Units Fan Performance — 48PGD06 Horizontal Units...
  • Page 131 Fan Performance — 48PGE06 Horizontal Units Fan Performance — 48PGF06 Horizontal Units...
  • Page 132 Fan Performance — 48PGD07 Horizontal Units Fan Performance — 48PGE07 Horizontal Units...
  • Page 133 Fan Performance — 48PGF07 Horizontal Units Fan Performance — 48PGD08 Horizontal Units...
  • Page 134 Fan Performance — 48PGE08 Horizontal Units Fan Performance — 48PGF08 Horizontal Units...
  • Page 135 Fan Performance — 48PGD09 Horizontal Units Fan Performance — 48PGE09 Horizontal Units...
  • Page 136 Fan Performance — 48PGF09 Horizontal Units Fan Performance — 48PGD12 Horizontal Units...
  • Page 137 Fan Performance — 48PGE12 Horizontal Units Fan Performance — 48PGF12 Horizontal Units...
  • Page 138 Fan Performance — 48PGD14 Horizontal Units...
  • Page 139 Fan Performance — 48PGE14 Horizontal Units...
  • Page 140 Fan Performance — 48PGF14 Horizontal Units...
  • Page 141 Fan Performance — 50PG03 Vertical Units Fan Performance — 50PG04 Vertical Units...
  • Page 142 Fan Performance — 50PG05 Vertical Units Fan Performance — 50PG06 Vertical Units...
  • Page 143 Fan Performance — 50PG07 Vertical Units Fan Performance — 50PG08 Vertical Units...
  • Page 144 Fan Performance — 50PG09 Vertical Units Fan Performance — 50PG012 Vertical Units...
  • Page 145 Fan Performance — 50PG014 Vertical Units...
  • Page 146 Fan Performance — 50PG03 Horizontal Units Fan Performance — 50PG04 Horizontal Units...
  • Page 147 Fan Performance — 50PG05 Horizontal Units Fan Performance — 50PG06 Horizontal Units...
  • Page 148 Fan Performance — 50PG07 Horizontal Units Fan Performance — 50PG08 Horizontal Units...
  • Page 149 Fan Performance — 50PG09 Horizontal Units Fan Performance — 50PG12 Horizontal Units...
  • Page 150 5. Use of a field-supplied motor may affect wire size. Recalculate the unit power supply MCA and MOCP if required. Contact your Carrier representative for details. 6. Use the following formula to calculate input watts: Input Watts = Bhp x (746/Motor Eff)
  • Page 151 Fan Performance — 48PMD16 Vertical Supply / Return Units Fan Performance — 48PME16 and 48PMF16 Vertical Supply / Return Units...
  • Page 152 Fan Performance — 48PMD20 Vertical Supply/Return Units Fan Performance — 48PME20 and 48PMF20 — Vertical Supply/Return Units...
  • Page 153 Fan Performance — 48PMD24 — Vertical Supply/Return Units Fan Performance — 48PME24 and 48PMF24 — Vertical Supply/Return Units...
  • Page 154 Fan Performance — 48PMD28 — Vertical Supply/Return Units Fan Performance — 48PME28 and 48PMF28 — Vertical Supply/Return Units...
  • Page 155 Fan Performance — 50PM16 Vertical Supply / Return Units...
  • Page 156 Fan Performance — 50PM20 — Vertical Supply/Return Units Fan Performance — 50PM24 — Vertical Supply/Return Units...
  • Page 157 Fan Performance — 50PM28 — Vertical Supply/Return Units...
  • Page 158 Fan Performance — 48PMD16 Horizontal Supply / Return Units Fan Performance — 48PME16 Horizontal Supply / Return Units Drive 4500 2.18 4800 2.51 5100 2.86 5400 3.24 5700 3.66 1033 6000 1029 3.74 1077 6300 1075 4.28 1121 6600 1122 4.88 1166 6900...
  • Page 159 Fan Performance — 48PMD20 — Horizontal Supply/Return Units...
  • Page 160 Fan Performance — 48PME20 — Horizontal Supply/Return Units Fan Performance — 48PMF20 — Horizontal Supply/Return Units...
  • Page 161 Fan Performance — 48PMD24 — Horizontal Supply/Return Units Fan Performance — 48PME24 — Horizontal Supply/Return Units...
  • Page 162 Fan Performance — 48PMF24 — Horizontal Supply/Return Units...
  • Page 163 Fan Performance — 48PMD28 — Horizontal Supply/Return Units...
  • Page 164 Fan Performance — 48PME28 — Horizontal Supply/Return Units...
  • Page 165 Fan Performance — 48PMF28 — Horizontal Supply/Return Units...
  • Page 166 Fan Performance — 50PM16 Horizontal Supply / Return Units Fan Performance — 50PM20 — Horizontal Supply/Return Units...
  • Page 167 Fan Performance — 50PM24 — Horizontal Supply/Return Units...
  • Page 168 Unit warranty will not be affected. See Evaporator−Fan Motor Specifications for additional information. 3. Use of a field-supplied motor may affect wire size. Contact your Carrier representative for details. 4. Interpolation is permissible. Do not extrapolate.
  • Page 169: Appendix D − Additional Start−Up Data

    APPENDIX D — ADDITIONAL START−UP DATA Air Quantity Limits (50PG03−14 Units) Air Quantity Limits (48PG03−14 Units) Air Quantity Limits (48PM16−28 Units) Air Quantity Limits (50PM16−28 Units)
  • Page 170 Evaporator Fan Motor Specifications − 48/50PG...
  • Page 171 Evaporator Fan Motor Specifications − 48/50PG (cont)
  • Page 172 Evaporator Fan Motor Specifications − 48PM16−28...
  • Page 173 Evaporator Fan Motor Specifications − 48PM16−28 (cont)
  • Page 174 Evaporator Fan Motor Specifications − 50PM16−28...
  • Page 175 Evaporator Fan Motor Specifications − 50PM16−28 (cont)
  • Page 176 Fan Rpm at Motor Pulley Settings* − 48/50PG Fan RPM at Motor Pulley Settings* − 48PM16−28...
  • Page 177 Fan RPM at Motor Pulley Settings* − 50PM16−28...
  • Page 178 Accessory/FIOP Pressure Drop (in. wg) — 48/50PG03-07 Accessory/FIOP Pressure Drop (in. wg) — 48/50PG08-14...
  • Page 179 Accessory/FIOP Static Pressure Drops (in. wg)* − 48/50PM16−28 Accessory/FIOP Electric Heat Static Pressure Drop (in. wg) − 50PM16−28...
  • Page 180: Control Set Point And Configuration Log

    CONTROL SET POINT AND CONFIGURATION LOG Model Number: _____________________________ Serial Number: ______________________________ Date: ______________________________________ Technician: _________________________________ INDICATE UNIT SETTINGS BELOW Control Type: Thermostat/T55 Space Temp./T−56 Space Temp./T−58 Space Temp. Set Points: Cooling Occupied: _______________ Heating DISP UNIT Software Versions: ___________________________ MBB: CESR131320−−...
  • Page 181 MODE — CONFIGURATION (cont) COOL...
  • Page 182 MODE — CONFIGURATION (cont) COOL (cont)
  • Page 183 MODE — CONFIGURATION (cont) COOL (cont)
  • Page 184 MODE — CONFIGURATION (cont)
  • Page 185 MODE — CONFIGURATION (cont) Disable/Enable...
  • Page 186 MODE — CONFIGURATION (cont)
  • Page 187 MODE — CONFIGURATION (cont)
  • Page 188: Unit Start−Up Checklist

    MODEL NO.: DATE: ______________ I. PRE-START-UP: VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT VERIFY INSTALLATION OF OUTDOOR AIR HOOD VERIFY INSTALLATION OF FLUE EXHAUST AND INLET HOOD (48PG and PM ONLY) VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT VERIFY GAS PRESSURE TO UNIT GAS VALVE IS WITHIN SPECIFIED RANGE (48PG and PM ONLY) CHECK GAS PIPING FOR LEAKS (48PG AND 48PM)

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