Carrier 48LC Series Installation Instructions Manual
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Carrier 48LC Series Installation Instructions Manual

Single package rooftop gas heating/electric cooling unit with puron (r---410a) refrigerant sizes: 04, 05, 06
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See also: Instruction and Installation Manual
48LC
Single Package Rooftop
Gas Heating/Electric Cooling Unit
with Puronr (R---410A) Refrigerant
Sizes: 04, 05, 06
NOTE: Read the entire instruction manual before starting
the installation

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  • Page 1: Table Of Contents

    48LC Single Package Rooftop Gas Heating/Electric Cooling Unit with Puronr (R---410A) Refrigerant Sizes: 04, 05, 06 Installation Instructions NOTE: Read the entire instruction manual before starting the installation TABLE OF CONTENTS SAFETY CONSIDERATIONS ....Units without Factory- - Installed Non- - Fused Disconnect or HACR .

  • Page 2: Safety Considerations

    Return Air Enthalpy Sensor ....WARNING Smoke Detectors ......Step 14 - - Adjust Factory- - Installed Options .
  • Page 3 Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit Heat Type Packaging 48 - Gas Heat Packaged Rooftop 0 = Standard 1 = LTL Model Series - WeatherExpert Electrical Options LC - Ultra High Efficiency A = None B = HACR Circuit Breaker Heat Options C = Non-Fused Disconnect...
  • Page 4 Vertical Connections / Economizer Horizontal Connections / Economizer C12141 Fig. 2 - - Unit Dimensional Drawing...
  • Page 5 C12142 Fig. 2 - - Unit Dimensional Drawing (cont.) C08337 LOCATION DIMENSION CONDITION 48--- in (1219 mm) Unit disconnect is mounted on panel 18--- in (457 mm) No disconnect, convenience outlet option 18--- in (457) mm Recommended service clearance 12--- in (305 mm) Minimum clearance 40--- in (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall)

  • Page 6: Installation

    INSTALLATION air. For proper unit operation, adequate combustion and ventilation air must be provided in accordance with Jobsite Survey Section 5.3 (Air for Combustion and Ventilation) of the National Fuel Gas Code, ANSI Z223.1 (American Complete the following checks before installation. National Standards Institute) and NFPA (National Fire 1.

  • Page 7: Step 2 - Plan For Sequence Of Unit Installation

    Step 2 — Plan for Sequence of Unit Installation Step 4 — Provide Unit Support The support method used for this unit will dictate different Roof Curb Mount — sequences for the steps of unit installation. For example, Accessory roof curb details and dimensions are shown in on curb- - mounted units, some accessories must be Fig.
  • Page 8 C13310 Fig. 4 - - Roof Curb Details...

  • Page 9: Step 5 - Field Fabricate Ductwork

    Rigging materials under unit (cardboard to prevent base pan damage) must be removed PRIOR to placing the unit on the roof curb. When using the standard side drain connection, ensure the red plug in the alternate bottom connection is tight. Do this before setting the unit in place.
  • Page 10 CAUTION - NOTICE TO RIGGERS: AVERTISSEMENT - REMARQUE À L’ATTENTION DES MONTEURS ALL PANELS MUST BE IN PLACE WHEN RIGGING. TOUS LES CAPOTS DOIVENT ÊTRE EN PLACE AVANT LE LEVAGE • Hook rigging shackles through holes in base rail, as shown in Detail “A”. •...

  • Page 11: Step 7 - - Convert To Horizontal And Connect Ductwork

    Step 7 — Convert to Horizontal and Connect Step 8 — Install Outside Air Hood Ductwork (when required) Economizer Hood Package Removal and Setup - - Unit is shipped in the vertical duct configuration. Unit Factory Option without factory- - installed economizer or return air smoke 1.

  • Page 12: Economizer Hood

    Economizer Hood — 4. Insert the hood divider between the hood sides. See Fig. 11 and 12. Secure hood divider with 2 screws on NOTE: If the power exhaust accessory is to be installed each hood side. The hood divider is also used as the on the unit, the hood shipped with the unit will not be bottom filter rack for the aluminum filter.

  • Page 13: Step 10 - Install Flue Hood

    Step 10 — Install Flue Hood unit is made to the - - in. FPT gas inlet port on the unit gas valve Flue hood is shipped screwed to the basepan beside the burner compartment access panel. Remove from shipping Manifold pressure is factory- - adjusted for NG fuel use.

  • Page 14: Factory- - Option Thru- - Base Connections (Gas Connections)

    Factory- - Option Thru- - Base Connections must be located at least 9- - in (230 mm) away from the access panel to permit the panel to be removed for service. (Gas Connections)— If a regulator valve is installed, it must be located a This service connection kit consists of a - - in NPT gas minimum of 4- - ft (1220 mm) away from the unit’s flue...
  • Page 15 WARNING FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal injury, death and/or property damage. S Connect gas pipe to unit using a backup wrench to avoid damaging gas controls. S Never purge a gas line into a combustion chamber. S Never test for gas leaks with an open flame.

  • Page 16: Step 12 - Install External Condensate Trap And Line

    Step 12 — Install External Condensate Trap Step 13 — Make Electrical Connections and Line WARNING The unit has one -in. condensate drain connection on the end of the condensate pan and an alternate connection ELECTRICAL SHOCK HAZARD on the bottom. See Fig. 22. Unit airflow configuration Failure to follow this warning could result in personal does not determine which drain connection to use.
  • Page 17 C13383 Fig. 24 - - 48LC Control Wiring Diagram...
  • Page 18 C13384 Fig. 25 - - 48LC Control Wiring Diagram with Humidi- - MiZer...
  • Page 19 THERMOSTAT C13387 Fig. 26 - - 48LC Power Wiring Diagram, 208/230V, 460V 3 Phase...
  • Page 20 THERMOSTAT C13388 Fig. 27 - - 48LC Power Wiring Diagram, 575V 3 Phase...
  • Page 21 C13389 Fig. 28 - - 48LC ComfortLINK Power Wiring Diagram, 208/230V, 460V 3 Phase...
  • Page 22 C13390 Fig. 29 - - 48LC ComfortLINK Power Wiring Diagram 575V 3 Phase...

  • Page 23: Units With Factory- - Installed Non- - Fused

    Units Without Disconnect or HACR Option Equip GR Lug IFTB Disconnect Ground (GR) 208/230-3-60 460-3-60 575-3-60 C12278 Units With Disconnect or HACR Option Fig. 32 - - Location of Non- - Fused Disconnect Enclosure To field install the NFD shaft and handle: 1.

  • Page 24: Units Without Factory- - Installed Non- - Fused

    Units Without Factory- - Installed Non- - Fused Disconnect or HACR — When installing units, provide a disconnect switch per NEC (National Electrical Code) of adequate size. Disconnect sizing data is provided on the unit informative plate. Locate on unit cabinet or within sight of the unit per national or local codes.
  • Page 25 Non- - powered type: This type requires the field Pwd-CO Transformer Convenience installation of a general- - purpose 125- - volt 15- - A circuit Outlet powered from a source elsewhere in the building. Observe GFCI national and local codes when selecting wire size, fuse or breaker requirements and disconnect switch size and Pwd-CO location.

  • Page 26: Hacr

    ComfortLINK controller. Thermostat — Install a Carrier- - approved accessory thermostat according to installation instructions included with the accessory. For complete economizer function and 2 stage compressor operation, select a two- - stage cooling thermostat. Locate the thermostat accessory on a solid wall in the conditioned...

  • Page 27: Unit Without Thru- - Base Connection Kit

    (units with PremierLinkt control). To connect the Carrier humidistat (HL38MG029): 1. Route the humidistat 2- - conductor cable (field- - sup- O/B/Y2 plied) through the hole provided in the unit corner...
  • Page 28 % RELATIVE HUMIDITY C09295 Fig. 43 - - Accessory Field- - Installed Humidistat ® C09296 Fig. 44 - - EDGE Pro Thermidistat TRAN FROM POWER SCHEMATIC DHRA FIOP/ PL19- CONTROL BD ACCESSORY POWER 3.2 AMPS DHRB 24 VAC GRN/YEL LTLO RETURN SMOKE RJ-45...

  • Page 29: Economi$Er X (Factory Option)

    Edge Programable Thermostat Unit CTB THERMOSTAT O/W2/B SRTN Humidi-MiZer™ FIOP *Connection not required. C13066 Fig. 46 - - Typical Rooftop Unit with Humidi- - MiZer Adaptive Dehumidification System with EDGE Pro Thermidistat Device EconoMi$er X (Factory- -Option) ComfortLINK (Factory- -Option) For details on operating 48LC units equipped with the For details on operating 48LC units equipped with the factory- - installed...
  • Page 30 C12151 Fig. 48 - - ComfortLINK Control Wiring Diagram (48LC 3- - 5 Ton Units)

  • Page 31: Rtu Open Control System

    Open enables the unit to run in 100% stand- - alone control unit’s main control box, to the left of the CTB. See mode, Carrier’s I- - Vu Open network, or a Third Party Fig. 50. Factory wiring is completed through harnesses Building Automation System (BAS).
  • Page 32 C13392 Fig. 51 - - RTU Open System Control Wiring Diagram...
  • Page 33 C13393 Fig. 52 - - RTU Open System Control Wiring Diagram with Humidi- - MiZer...

  • Page 34: Supply Air Temperature (Sat) Sensor

    Parallel pins J5--- 1 = J2--- 6, J5--- 3 = J1--- 10, J5--- 5 = J1--- 2 are used for field --- installation. The RTU Open controller requires the use of a Carrier space sensor. A standard thermostat cannot be used with the RTU Open system.

  • Page 35: Outdoor Air Temperature (Oat) Sensor

    J20- - 2 and J20- - 3 per Fig. 57. Space Temperature (SPT) Sensors — There are two types of SPT sensors available from Carrier, resistive input non-communicating (T55, T56, and T59) and Rnet communicating (SPS, SPPL, SPP, and SPPF) sensors.

  • Page 36: Indoor Air Quality (Co 2) Sensor

    Connect T- - 59: The T- - 59 space sensor requires a separate, To controller isolated power supply of 24 VAC. See Fig. 58 for internal connections at the T- - 59. Connect the SEN terminal (BLU) to RTU Open J20- - 1. Connect the COM terminal (BRN) to J20- - 2.

  • Page 37: Outdoor Air Quality Sensor

    Outdoor Air Quality Sensor Space Relative Humidity Sensor or Humidistat — (PNO 33ZCSENCO2 plus weatherproof enclosure) — Humidi- - MiZer Control Wiring: In units equipped with the Humidi- - MiZer option there are two loose wires The outdoor air CO sensor is designed to monitor carbon dioxide (CO ) levels in the outside ventilation air and...

  • Page 38: Smoke Detector/Fire Shutdown (Fsd)

    J4-1 or J4-4 + 24 VDC Supply Voltage J4-2 or J4-5 (-)4 to 20 mA Current Loop Output to RTU Open Relative Humidity Sensor (Polarized Male Connector) SPAN ZERO 4-20 VAC GND 0-5V 0-10V C10839 Fig. 64 - - Duct Relative Humidity Sensor Typical Wiring Humidistat: The accessory humidistat provides the RTU Fan Status: The fan status accessory is a field- - installed Open insight to the relative humidity in the space.

  • Page 39: Communication Wiring - - Protocols

    Communication Wiring - - Protocols The RTU Open can be set to communicate on four different protocols: BACnet, Modbus, N2, and LonWorks. Switch 3 (SW3) on the board is used to set protocol and General — baud rate. Switches 1 and 2 (SW1 and SW2) are used to Protocols are the communication languages spoken by set the board’s network address.

  • Page 40: Local Access

    Local Access computer to the RTU Open board. The link cable connects a USB port to the J12 local access port. This program functions and operates identical to the handheld. BACview Handheld: The BACview is a keypad/display interface used to connect to the RTU Open to access the RTU Open Troubleshooting —...

  • Page 41: Outdoor Air Enthalpy Control

    Table 5 – LEDs The LEDs on the RTU Open show the status of certain functions If this LED is on... Status is... Power RTU Open has power RTU Open is receiving data from the network segment RTU Open is transmitting data over the network segment The digital output is active The Run and Error LEDs indicate control module and network status If Run LED shows...

  • Page 42: Smoke Detectors

    To wire the return air enthalpy sensor, perform the Return Air Smoke Detector following: (as shipped) 1. Use a 2- - conductor, 18 or 20 AWG, twisted pair cable to connect the return air enthalpy sensor to the enthalpy controller. 2.

  • Page 47: Step 14 - Adjust Factory- -Installed Options

    Legend and Notes for Tables 6 and 7 LEGEND: Example: Supply voltage is 230-3-60 --- Belt drive indoor fan motor AB = 224 v BRKR --- Circuit breaker BC = 231 v --- Convenient outlet AC = 226 v --- Direct drive indoor fan motor (224 + 231 + 226) DISC...

  • Page 48: Appendix - - Vfd Operation With Remote Keypad

    APPENDIX — VFD Operation with Remote Keypad All 48LC size 04- - 06 units are equipped with a VFD (Variable Frequency Drive) to automatically adjust the indoor fan motor speed in sequence with the unit’s ventilation, cooling and heating operation. The VFD keypad is included as standard on electro mechanical and RTU Open models.
  • Page 49 Start Up with Assistant Standard Display Mode Initial start- - up has been performed at the factory. Use of the Use the standard display mode to read information on the start up assistant will override factory VFD configurations. drive status and operate the drive. To reach the standard DO NOT USE THE START- - UP ASSISTANT ON THESE display mode, press EXIT until the LCD display shows LC UNITS!
  • Page 50 Select EXIT (SOFT KEY 1) to return to the press the UP and DOWN keys simultaneously. To restore the main menu. default factory settings, select the Carrier application macro. 7. The control panel can now be disconnected from the Changed Parameters Mode drive.
  • Page 51 Download Application Parameters — 5. Use the UP or DOWN keys to highlight TIME FORMAT and press SEL (SOFT KEY 2). Use the UP To download application parameters only to the control or DOWN keys to change the parameter setting. Press panel from the VFD, perform the following procedure: OK (SOFT KEY 2) to save the configuration and re- 1.
  • Page 52 Table 8 – 48LC 04- - 06 VFD Parameters Unit Size 48LC 04 Motor Description 1.7 HP 575V 1.7 HP 208--- 230V 1.7 HP 460V 2.4 HP 575V 2.4 HP 208--- 230V Drive/Motor Voltage 575V 208--- 230V 460V 575V 208--- 230V Motor Part Number HD56FR579 HD56FR233...
  • Page 53 Table 8 - - 48LC 04- - 06 VFD Parameters (cont.) Unit Size 48LC 04 48LC 05 48LC 06 Motor Description 2.4 HP 460V 1.7 HP 575V 1.7 HP 208--- 230V 1.7 HP 460V 2.4 HP 575V Drive/Motor Voltage 460V 575V 208--- 230V 460V...
  • Page 54 Table 8 - - 48LC 04- - 06 VFD Parameters (cont.) Unit Size 48LC 06 48LC 05/06 Motor Description 2.4 HP 208--- 230V 2.4 HP 460V 2.9 HP 208--- 230V 2.9 HP 460V 3.7 HP 575V Drive/Motor Voltage 208--- 230V 460V 208--- 230V 460V...
  • Page 55 VFD Diagnostics Correcting Faults The recommended corrective action for faults is shown in The drive detects error situations and reports them using: the Fault Listing Table 9. The VFD can also be reset to remove the fault. If an external source for a start 1.
  • Page 56 3015 UNDERLOAD CURVE. THERM FAIL Internal fault. The thermistor measuring the internal temperature of the drive is open or shorted. Contact Carrier. Internal fault. A communication ---related problem has been detected between the OMIO and OINT boards. Contact OPEX LINK Carrier.
  • Page 57 Table 9 — FAULT CODES (cont) FAULT FAULT NAME IN PANEL DESCRIPTION AND RECOMMENDED CORRECTIVE ACTION CODE 1000 Parameter values are inconsistent. Check for any of the following: 2001 MINIMUM SPEED > 2002 MAXIMUM SPEED 2007 MINIMUM FREQ > 2008 MAXIMUM FREQ 2001 MINIMUM SPEED / 9908 MOTOR NOM SPEED is outside of the range: ---128/+128 PAR HZRPM 2002 MAXIMUM SPEED / 9908 MOTOR NOM SPEED is outside of the range: ---128/+128...

  • Page 58: Start- - Up Checklist

    (ALARM) or 16 (FLT/ALARM). Catalog No: 48LC ---4---6---01SI Copyright 2013 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Edition Date: 06/13 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 59 START-UP CHECKLIST (Remove and Store in Job File) I. PRELIMINARY INFORMATION MODEL NO.: SERIAL NO.: DATE: TECHNICIAN: II. PRE-START-UP (insert checkmark in box as each item is completed) j VERIFY THAT JOBSITE VOLTAGE AGREES WITH VOLTAGE LISTED ON RATING PLATE j VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT j REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS j VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS...
  • Page 60 SET ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO MATCH JOB REQUIREMENTS (IF EQUIPPED) Catalog No: 48LC ---4---6---01SI Copyright 2013 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Edition Date: 06/13 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

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