Carrier 50HCQA- Manuals

5 Table 2 – Scrolling Marquee Mode and Menu Display Structure RUN STATUS SERVICE TEST TEMPERATURES PRESSURES SETPOINTS INPUTS OUTPUTS CONFIGURATION TIME CLOCK OPERATING MODES ALARMS Auto View of Run Status (VIEW) ↓ Software Version Numbers (VERS) ↓ Control Modes (MODE) ↓ Cooling Status (COOL) ↓ Heat...

6 Conventions Used in This Manual The following conventions for discussing configuration points forthe local display (Scrolling Marquee or Navigator ™ accessory) will be used in this manual.Point names will be written with the Mode name first, then anysubmodes, then the point name, each separated by...

7 CFM to the application requirements. The VFD’s settings shouldnot be used for adjusting fan performance. Specific VFD information can be found in Appendix C. IMPORTANT : The Supply Fan Maximum Speed (FS.MX) RPM must not produce a supply CFM that is lower than the minimumCFM allowed in the product ...

8 OUTDOOR AIRSCREEN(HIDDEN) CONTROL BOXACCESS PANEL FILTER AND INDOOR COILACCESS PANEL INDOOR BLOWERACCESS PANEL GAS SECTIONACCESS PANEL C11475 Fig. 5 -- 48/50HC MRT Units, Panel and Filter Locations (48HC*17 Unit Shown) Gas Heat (48HC) Inspect the gas heat section of the unit. Verify the number ofb...

9 CONTROLS QUICK SET--UP The following information will provide a quick guide to setting up and configuring the 48/50HC series units with Comfort Link controls. Unit controls are pre-configured at the factory for factory-installed options. Field-installed accessories will require configuration at st...

10 Power Exhaust If a Power Exhaust accessory was field installed, the unit must be configured for it by setting Configuration → ECON → PE.EN to ENBL. The default settings for the other power exhaust configurations should be satisfactory. If they need to be changed,additional information about these...

12 SERVICE TEST The Service Test function can be used to verify proper operation ofcompressors, heating stages, Humidi--MiZer t System, indoor fan, power exhaust fans, economizer, and the alarm relay. Use ofService Test is recommended at initial system start up and during troubleshooting (See Table ...

13 Heating Test The heating (HEAT) submenu is used to change output status forthe 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 controllednormally to maintain proper unit ope...

14 CONTROLS OPERATION Display Configuration The Configuration → DISP submenu is used to configure the local display settings. Metric Display (METR) This variable is used to change the display from English units to Metric units. Language Selection (LANG) This variable is used to change the language o...

16 When the space sensor has a setpoint slider adjustment, the cooland heat setpoints (occupied) can be offset by sliding the bar from one side to the other. The SPT Offset Range (+/--) ( Setpoints → STO.R ) sets the total positive or negative degrees that can be added to the setpoints. With the sli...

18 Constant Volume (CV) Units (FTYP = 1--Speed) Single speed fan units are controlled by the Indoor Fan Relay 1 ( Outputs → FANS → IDF.1 ) on the main base board (MBB), which then operates the indoor fan contactor (IFC). The fan will be either on or off depending on the unit control type and thecond...

19 expire before another stage can be added or a stage can besubtracted. If at any time the Supply--Air Temperature (SAT) falls below the Minimum Supply Air Temperature Upper Level( Configuration → COOL → SAT → SAT.U ), the requested stages will not be allowed to increase. If at any time the SAT fal...

20 Staging Control Once the unit is in a heating mode, it must decide what the demand is and how to satisfy. Based on the unit control configuration, requestedheating stages ( Run Status → HEAT → REQ.H ) will be determined then passed to heat control to actually add the heating stages. Thermostat Co...

21 Economizer If an economizer is installed, then Economizer Installed( Configuration → ECON → EC.EN ) should be set to YES. The economizer damper is controlled by the Econo Commanded Position ( Outputs → ECON → EC.CP ) on the Economizer Control Board (ECB). Feed back from the economizer actuator is...

22 The shape of the Economizer Minimum Position vs. Fan Speedcurve is determined by the configuration parameters: Econ Min at 25% Fan speed ( Configuration → ECON → MP.25 ), Econ Min at 50% Fan speed ( Configuration → ECON → MP.50 ), Econ Min at 75% Fan speed ( Configuration → ECON → MP.75 ) and Eco...

23 Power Exhaust (SAV t units) To enable power exhaust, set Power Exhaust Installed ( Configuration → ECON → PE.EN ) to YES. Both power exhaust fans are wired together and are controlled by the configuration Power Exhaust Stage1 CFM ( Configuration → ECON → PE1.C ). When the Indoor Fan Max Speed CFM...

24 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 4mA signal corresponds to 0% and the 20mA signal corresponds to 100%. In this mode, configurations such as Econ Min at Max Fan Speed ( Configuration → ECON → MP.MX ), Econo ...

29 Reheat Control The cooling staging and compressor control routines are responsible for controlling each circuit in one of the threesub--modes (Cool, Reheat1, or Reheat2). When there is only a cooling demand, one or more circuits will operate in normalcooling mode. When there is only dehumidificat...

30 When the Start Bias Time is greater than zero the algorithm willsubtract it from the next occupied time to calculate the new start time. When the new start time is reached, the TemperatureCompensated Start mode is set, the fan is started and the unit controlled as in an occupied state. Once set, ...

31 Configuration → CCN → LDSH → R.MXC This configuration tells the unit the maximum cooling stages allowed to be on during a redline condition. Configuration → CCN → LDSH → S.MXC This configuration tells the unit the maximum cooling stages allowed to be on during a loadshed condition. Configuration ...

32 components to be checked while the unit is not operating. SeeService Test. Complete Unit Stoppage There are several conditions that can cause the unit not to provide heating or cooling: S If an alarm is active which causes the unit to shut down,diagnose the problem using the information provided ...

37 Table 9 – Comfort Link Alarm Codes ALARM OR ALERT NUMBER DESCRIPTION ACTION TAKEN BY CONTROL RESET METHOD PROBABLE CAUSE T051 Compressor A1 Safety Trip Add Strike for Circuit A Automatic High --- pressure switch open. Compressor internal protection open. Wiring error Service Test --- Compressor A...

38 Table 9 — Comfort Link Alarm Codes (cont) ALARM OR ALERT NUMBER DESCRIPTION ACTION TAKEN BY CONTROL RESET METHOD PROBABLE CAUSE A154 Serial EEPROM Hardware Failure Unit Shutdown Automatic Software failure or MBB failure T155 Serial EEPROM Storage Failure Error Unit operation errors Automatic Soft...

39 Control Module Communication Red LED Proper operation of the MBB and ECB control boards can be visually checked by looking at the red status LEDs. Whenoperating correctly, the red status LEDs should blink in unison at a rate of once every 2 seconds. If the red LED on the ECB is notblinking, check...

40 Cooling Troubleshooting Use the Scrolling Marquee display or a CCN device to view thecooling 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 andcorrect any causes. (...

41 Humidi--MiZer t Troubleshooting Use the unit Scrolling Marquee display or a CCN device to viewthe 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 histor...

42 Economizer Troubleshooting Use the unit Scrolling Marquee display or a CCN device to viewthe 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 anyeconomizer alarm codes and c...

43 Heating Troubleshooting Use the unit Scrolling Marquee display or a CCN device to viewthe 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 andcorrect any caus...

45 Table 15 – IGC Board LED Alarm Codes LED FLASH CODE DESCRIPTION ACTION TAKEN BY CONTROL RESET METHOD PROBABLE CAUSE On Normal Operation — — — Off Hardware Failure No gas heating. — Loss of power to the IGC. Check 5 amp fuse on IGC, power to unit, 24V circuit breaker, transformer, and wiring to th...

46 Phase Loss Protection The phase loss protection option will monitor the three-phase electricalsystem 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 ...

53 Table 19 – Pressure (psig) vs. Voltage Drop Values for Suction Pressure Transducers PRESSURE (psig) VOLTAGE DROP (V) PRESSURE (psig) VOLTAGE DROP (V) PRESSURE (psig) VOLTAGE DROP (V) PRESSURE (psig) VOLTAGE DROP (V) 0 0.465 68 1.135 136 1.804 204 2.474 2 0.485 70 1.154 138 1.824 206 2.493 4 0.505...

62 Main Base Board (MBB) See Fig. 30 and Table 20. The MBB is the center of the Comfort Link control system. It contains the major portion of the operating software and controls the operation of the unit. The MBB continuously monitors input/output channel informationreceived from its inputs and from...

66 Integrated Gas Control (IGC) Board The IGC is provided on gas heat units. (See Fig. 32 and Table 22.)The IGC controls the direct spark ignition system and monitors the rollout switch, limit switch, and induced-draft motor Hall Effect switch. RED LED-STATUS C07028 Fig. 32 -- Integrated Gas Control...

67 48/50HC 04--14 Units — Low Voltage Terminal Board (TB) The field connection terminal board has 30 terminals oriented in 3rows of 10 terminals. The front has screw terminals and the back has spade connectors. This board provides connection fo the thermostat, space sensor, and most field installed ...

68 Table 24 – Upper and Lower Field Connection Terminal (TB A and TB B) Board Connections (17--28 Size Units) TERMINAL BLOCK TERMINAL LABEL DISPLAY NAME* DESCRIPTION SENSOR LOCATION TYPE OF I/O TERMINAL NUMBER Upper (TB A) C --- 2 Transformer 2 Common 24 VAC common 1,3,4 R --- 2 24 VAC power Transfo...

69 Table 25 – Central Terminal Board (CTB) Connections CONNECTION LABEL PIN NUMBER POINT DESCRIPTION 24Vac FROM 24Vac TO DDC T’STAT 7 Compressor 1 Call MBB ECON 6 Compressor 2 Call MBB ECON 5 Heat Stage 1 Call MBB CONTL BOARD 4 Heat Stage 2 Call MBB CONTL BOARD ECON 1,2 Comp 1 Call jumper DDC T’STAT...

70 Scrolling Marquee Display This device is the keypad interface used to access rooftopinformation, read sensor values, and test the unit. (See Fig. 35.) The Scrolling Marquee display is a 4-key, 4-character, 16-segment LED (light-emitting diode) display. Eleven mode LEDs are locatedon the display a...

71 CCN BUS BUILDING SUPERVISOR CL ROOFTOP UNIT ROOFTOP UNIT ROOFTOP UNIT ROOFTOP UNIT CL NETWORK OPTIONS REMOTECCN SITE NON CARRIER HVAC EQUIPMENT AUTODIALGATEWAY COMFORT CONTROLLER CL CL HEATING/COOLING UNITS LEGEND CCN -- Carrier Comfort Network ® CL -- ComfortLink ControlsDAV -- Digital Air Volum...

72 Protective Devices Compressor Protection Overcurrent Each compressor has internal line break motor protection. Overtemperature Each compressor has an internal protector to protect it against excessively high discharge gas temperatures. High--Pressure Switch If the high-pressure switch trips, the ...

75 APPENDIX A — LOCAL DISPLAY AND CCN TABLES MODE — RUN STATUS ITEM EXPANSION RANGE UNITS CCN TABLE/ Sub --- TABLE CCN POINT CCN WRITE STATUS RUN STATUS STATUS DISPLAY VIEW Auto View of Run Status (VIEW = Display only) HVAC HVAC Mode Status 1=Disabled 2=Ventilation 3=Cool 4=Heat HVACMODE OCC Current...

78 APPENDIX A — LOCAL DISPLAY AND CCN TABLES MODE — SERVICE TEST ITEM EXPANSION RANGE UNITS CCN TABLE/Sub --- TABLE CCN POINT SERVICE TEST TEST Field Service Test Mode Off/On (TEST = display only) INDP Test Independent Outputs TESTINDP ECON Economizer Position Test 0 to 100 % S_ECONO E.CAL Calibrate...

79 APPENDIX A — LOCAL DISPLAY AND CCN TABLES MODE — INPUTS ITEM EXPANSION RANGE UNITS CCN TABLE/ Sub --- TABLE CCN POINT CCN WRITE STATUS DISPLAY WRITE STATUS INPUTS STATUS DISPLAY STAT Thermostat Inputs UINPUT Y1 Thermostat Y1 Input Off/On Y1 forcible forcible Y2 Thermostat Y2 Input Off/On Y2 forci...

80 APPENDIX A — LOCAL DISPLAY AND CCN TABLES MODE — CONFIGURATION ITEM EXPANSION RANGE UNITS DEFAULT CCN TABLE/ Sub --- TABLE CCN POINT PAGE NO. CONFIGURATION SERVICE CONFIGURATION DISP DISPLAY CONFIGURATION DISPLAY METR Metric Display No/Yes No DISPUNIT 14 LANG Language Selection 0=English 1=Spanis...

85 APPENDIX A — LOCAL DISPLAY AND CCN TABLES MODE — TIME CLOCK ITEM EXPANSION RANGE UNITS DEFAULT CCN TABLE/ Sub --- TABLE CCN POINT TIME CLOCK CONFIGURATION TIME Time of Day TIME TIME Hour and Minute xx.xx hh.mm TIME DATE Current Date MNTH Month of Year January, February, ..., December MOY DOM Day ...

86 APPENDIX A — LOCAL DISPLAY AND CCN TABLES MODE — OPERATING MODES ITEM EXPANSION RANGE UNITS CCN TABLE/ Sub --- TABLE CCN POINT CCN WRITE STATUS DISPLAY WRITE STATUS OPERATING MODES MAINTENANCE DISPLAY MODE Control Modes MODES SYS Unit operation disabled Unit operation enabled Service test enabled...

89 APPENDIX A — LOCAL DISPLAY AND CCN TABLES MODE — OPERATING MODES (cont) ITEM EXPANSION RANGE UNITS CCN TABLE/ Sub --- TABLE CCN POINT CCN WRITE STATUS DISPLAY WRITE STATUS (LINKDATA = CCN only) CCN --- Linkage LINKDATA Supervisory Element # xxx SUPE --- ADR Supervisory Bus xxx SUPE --- BUS Superv...

90 APPENDIX B — CONTROL MODES WITH Humidi--MiZer ™ SYSTEM AND ECONOMIZER Thermostat input shown for cooling demand (versus temperaturesensor and set point). Humidistat input shown for dehumidification demand (versus relative humidity sensor and setpoint). Economizer cooling availability is dependent...

91 APPENDIX C — VARIABLE FREQUENCY DRIVE (VFD) On units equipped with supply fan VFDs, the indoor fan motor iscontrolled by a 3-phase VFD. The supply fan VFD is located in the supply fan section behind the access door. These units use ABBVFDs. The VFD varies the frequency of the AC voltage supplied ...

93 Table 31 – VFD Motor Default Configurations UNIT SIZE (Digits 7 & 8) UNIT VOLTAGE (Digit 12) UNIT STATIC OPTION (Digit 10) COMFORTLINK CCN POINT (DISPLAY MENU ITEM) VFD1NVLT (N.VLT) VFD1NAMP (N.AMP) VFD1NFRQ (N.FRQ) VFD1NRPM (N.RPM) VFD1NPWR (N.PWR) VFD1MAXA (MAX.A) 08 208/230v (5) Low (1) 23...

94 Table 31 — VFD Motor Default Configurations (cont) UNIT SIZE (Digits 7 & 8) UNIT VOLTAGE (Digit 12) UNIT STATIC OPTION (Digit 10) COMFORTLINK CCN POINT (DISPLAY MENU ITEM) VFD1NVLT (N.VLT) VFD1NAMP (N.AMP) VFD1NFRQ (N.FRQ) VFD1NRPM (N.RPM) VFD1NPWR (N.PWR) VFD1MAXA (MAX.A) 20 208/230v (5) V--...

95 VFD Diagnostics The drive detects error situations and reports them using: 1. Green and red LEDs on the body of the drive (located under the keypad) 2. Status LED on the control panel3. Control panel display4. The Fault Word and Alarm Word parameter bits (parameters 0305 to 0309) The form of the ...

98 CONTROL SET POINT AND CONFIGURATION LOG MODEL NO.: SERIAL NO.: DATE: TECHNICIAN: SOFTWARE VERSIONS MBB: CESR131504-- --_ _ ECB: CESR131249-- --_ _ MARQ: CESR131171-- --_ _ INDICATE UNIT SETTINGS BELOW CONTROL TYPE: Thermostat/T55 Space Temp./T--56 Space Temp./T--58 Space Temp. SET POINT Cooling O...

103 UNIT START-UP CHECKLIST MODEL NO.: DATE: I. PRE-START-UP: SERIAL NO: TECHNICIAN: j VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT j VERIFY INSTALLATION OF OUTDOOR AIR HOOD j VERIFY INSTALLATION OF FLUE EXHAUST AND INLET HOOD (48HC ONLY) j VERIFY THAT CONDENSATE CONNECTION IS INS...

7 A-B 0.5” (13) B-C 1.0” (25) A-C 1.0” (25) MAXIMUM ALLOWABLE DIFFERENCE IN. (MM) C06110 Fig. 4 -- Unit Leveling Tolerances Step 5 — Field Fabricate Ductwork Cabinet return-air static pressure (a negative condition) shall not exceed 0.35 in. wg (87 Pa) with economizer or 0.45 in. wg (112 Pa) without...

8 C06005 UNIT MAX WEIGHT DIMENSIONS A B C LB KG IN MM IN MM IN MM 50HCQA04 725 330 74.5 1890 38.5 980 33.5 850 50HCQA05 845 384 74.5 1890 37.5 955 41.5 1055 50HCQA06 900 409 74.5 1890 37.5 955 41.5 1055 NOTES : 1. Dimensions in ( ) are in millimeters.2. Hook rigging shackles through holes in base ra...

9 Step 8 — Install Outside Air Hood Economizer Hood Removal and Setup -- Factory Option — 1. The hood is shipped in knock--down form and located in the return air compartment. It is attached to the economizer using two plastic tie--wraps. 2. To gain access to the hood, remove the filter access panel...

10 Economizer Hood and Two--Position Hood —NOTE : If the power exhaust accessory is to be installed on the unit, the hood shipped with the unit will not beused and must be discarded. Save the aluminum filter for use in the power exhaust hood assembly. 1. The indoor coil access panel will be used as ...

11 NOTE: Trap should be deep enough to offset maximum unit static difference. A 4” (102) trap is recommended . MINIMUM PITCH 1” (25mm) PER 10’ (3m) OF LINE BASE RAIL OPEN VENT TO ROOF DRAIN DRAIN PLUG ROOF CURB SEE NOTE 2 ˝ (51) MIN C08022 Fig. 14 -- Condensate Drain Piping Details All units must ha...

12 Units with Factory--Installed Disconnect — The factory--installed option disconnect switch is located in a weatherproof enclosure located under the main control box. The manual switch handle is accessible through an opening in the access panel. Discard the factory test leads (see Fig. 16). Units ...

15 RACEWAY HOLE IN END PANEL (HIDDEN) C08027 Fig. 22 -- Field Control Wiring Raceway Electric Heaters 50HCQ units may be equipped with field--installed accessory electric heaters. The heaters are modular in design, with heater frames holding open coil resistance wires strung through ceramic insulato...

16 TRACK FLANGE C08135 Fig. 25 -- Typical Module Installation Single Point Boxes and Supplementary Fuse When the unit MOCP device value exceeds 60--A, unit--mounted supplementary fuses are required for each heater circuit. These fuses are included in accessory Single Point Boxes, with power distribu...

17 PremierLink t (Factory--Option) C08199 Fig. 28 -- PremierLink Controller The PremierLink controller (see Fig. 28) is compatible with Carrier Comfort Network r (CCN) devices. This control is designed to allow users the access and ability to change factory--defined settings, thus expanding the func...

19 Outdoor Air Temperature (OAT) Sensor — The OAT is factory--mounted in the EconoMi$er2 (FIOP or accessory). It is a nominal 10k ohm thermistor attached to an eyelet mounting ring. EconoMi$er t 2 — The PremierLink control is used with EconoMi$er2 (option or accessory) for outdoor air management. Th...

20 G J4-12 J4-10 J4-8 Y1 Y2 2 R R 4 6 J4-6 J4-4 W2 C 8 10 C SPACETHERMOSTAT PL CTBTHERMOSTAT W1 TB1 CTBTHERMOSTAT C08119 Fig. 35 -- Space Thermostat Connections Table 3 – PremierLink Sensor Usage APPLICATION OUTDOOR AIR TEMPERATURE SENSOR RETURN AIR TEMPERATURE SENSOR OUTDOOR AIR ENTHALPY SENSOR RET...

22 If the 50HCQ unit has an economizer system and free--cooling operation is required, a sensor representing Return Air Temperature must also be connected (field--supplied and installed). This sensor may be a T--55 Space Sensor (see Fig. 31) installed in the space or in the return duct, or it may be...

25 signal pins must be wired to the signal ground pins. Wiring connections for CCN must be made at the 3--pin plug. At any baud (9600, 19200, 38400 baud), the number of controllers is limited to 239 devices maximum. Bus length may not exceed 4000 ft, with no more than 60 total devices on any 1000--f...

28 Table 8 – RTU--MP Controller Inputs and Outputs POINT NAME BACnet OBJECT NAME TYPE OF I/O CONNECTION PIN NUMBERS INPUTS Space Temperature Sensor sptsens AI (10K Thermistor) J20 --- 1, 2 Supply Air Temperature sat AI (10K Thermistor) J2 --- 1, 2 Local Outside Air Temperature Sensor oatsens AI (10K...

29 Field Connections Field connections for accessory sensors and input devices are made the RTU--MP, at plugs J1, J2, J4, J5, J11 and J20. All field control wiring that connects to the RTU--MP must be routed through the raceway built into the corner post as shown in Fig. 22. The raceway provides the...

31 Input 8 or 9 is recommended for easy of installation. Refer to Fig. 47 and Fig. 49 for wire terminations at J5. Remote Occupancy: The remote occupancy accessory is a field--installed accessory. This accessory overrides the unoccupied mode and puts the unit in occupied mode. When installing this a...

33 Table 9 – LEDs The LEDs on the RTU--MP show the status of certain functions If this LED is on... Status is... Power The RTU MP has power Rx The RTU MP is receiving data from the network segment Tx The RTU MP is transmitting data over the network segment DO# The digital output is active The Run an...

34 Duct smoke sensor controller Fastener (2X) Controller cover Conduit nuts (supplied by installer) Conduit support plate Cover gasket (ordering option) Conduit couplings (supplied by installer) Terminal block cover Controller housing and electronics Alarm Power Test/resetswitch Trouble C08208 Fig. ...

35 location and the tubing to the sampling tube be connected. See “ Completing Installation of Return Air Smoke Sensor :” for details.) Return Air Detector Sampling Tube Controller module Return Air Detector module(shipping position shown)* *RA detector must be moved from shipping position to operat...

36 Table 10 – Unit Wire/Fuse or HACR Breaker Sizing Data UN IT N O M .V --- P h --- H Z IF M TY P E ELEC. HTR P.E. NO C.O. or UNPWR C.O. CRHEATER*** NOM (KW) FLA FLA NO P.E. w/P.E. (pwrd fr/unit) MCA FUSE or HACR BRKR DISC. SIZE MCA FUSE or HACR BRKR DISC. SIZE FLA LRA FLA LRA 50H CQ A04 208/ 230 --...

42 Legend and Notes for Table 10 LEGEND: BRKR --- Circuit breaker CO --- Convenient outlet DD --- Direct drive indoor fan motor DISC --- Disconnect FLA --- Full load amps IFM --- Indoor fan motor LRA --- Locked rotor amps MCA --- Minimum circuit amps PE --- Power exhaust PWRD CO --- Powered convenie...

43 Step 12 — Install Accessories Available accessories include: Roof CurbThru--base connection kit (must be installed before unit is set on curb)Manual outside air damperTwo--Position motorized outside air damperEconoMi$er IV (with control and integrated barometric relief)EconoMi$er2 (without contro...