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

Single package rooftop gas heat/electric cooling unit with puron (r-410a) refrigerant
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NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Step 1 — Plan for Unit Location . . . . . . . . . . . . . . . . 9
• ROOF MOUNT
Step 2 — Plan for Sequence of Unit Installation . . 10
• CURB-MOUNTED INSTALLATION
• PAD-MOUNTED INSTALLATION
• FRAME-MOUNTED INSTALLATION
Step 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . 10
Step 4 — Provide Unit Support . . . . . . . . . . . . . . . . 10
• ROOF CURB MOUNT
• SLAB MOUNT (HORIZONTAL UNITS ONLY)
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT)
Step 5 — Field Fabricate Ductwork . . . . . . . . . . . . . 12
Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . 12
• POSITIONING ON CURB
Step 7 — Convert to Horizontal and Connect
Ductwork (when required) . . . . . . . . . . . . . . . . . . 13
Step 8 — Install Outside Air Hood . . . . . . . . . . . . . . 14
• ECONOMIZER HOOD REMOVAL AND SETUP –
FACTORY OPTION
• ECONOMIZER HOOD ASSEMBLY
Step 9 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . 15
Step 10 — Install Gas Piping . . . . . . . . . . . . . . . . . . 15
• FACTORY-OPTION THRU-BASE CONNECTIONS
(GAS CONNECTION)
Step 11 — Install External Condensate Trap and
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Step 12 — Make Electrical Connections . . . . . . . . . 18
• FIELD POWER SUPPLY
• ALL UNITS
• UNITS WITHOUT FACTORY-INSTALLED NON-
FUSED DISCONNECT OR HACR
• UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT OR HACR
• CONVENIENCE OUTLETS
• HACR
• FACTORY-OPTION THRU-BASE CONNECTIONS
(ELECTRICAL CONNECTIONS)
• UNITS WITHOUT THRU-BASE CONNECTIONS
• FIELD CONTROL WIRING
• THERMOSTAT
• UNIT WITHOUT THRU-BASE CONNECTION KIT
• HEAT ANTICIPATOR SETTINGS
Humidi-MiZer® System Control Connections . . . . 30
• HUMIDI-MIZER SYSTEM – SPACE RH CONTROLLER
RTU Open Controller (Factory-Installed Option) . . 31
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480301-01
Installation Instructions
Printed in U.S.A.
Form 48LC-8-12-07SI
WeatherExpert
Single Package Rooftop
Gas Heat/Electric Cooling Unit
with Puron
®
SystemVu™ Controller (Factory-Installed Option) .31
Integrated Staging Control (ISC) Board . . . . . . . . . .32
• ISC BOARD - SEQUENCE OF OPERATION
EconoMi$er® X (Factory Option) . . . . . . . . . . . . . . .34
• SYSTEM COMPONENTS
• SPECIFICATIONS
• INPUTS
• OUTPUTS
• ENVIRONMENTAL
• ECONOMIZER MODULE WIRING DETAILS
• INTERFACE OVERVIEW
• SETUP AND CONFIGURATION
• ENTHALPY SETTINGS
• TWO-SPEED FAN OPERATION
• CHECKOUT
• TROUBLESHOOTING
Staged Air Volume (SAV™) with Variable Frequency
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Multi-Speed VFD Display Kit (Field-Installed
Accessory) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
• ALPHA NUMERIC DISPLAY
• MENU KEY
• NAVIGATION KEYS AND STATUS LEDS
• OPERATION KEYS AND LEDS
• CONNECTING THE KEYPAD TO THE VFD
• PROGRAM THE VFD FOR 3 DISCRETE INDOOR FAN
SPEEDS
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
• COMPLETING INSTALLATION OF RETURN-AIR
SMOKE SENSOR
• ADDITIONAL APPLICATION DATA
Step 13 — Adjust Factory-Installed Options . . . . . . 60
• SMOKE DETECTORS
Step 14 — Install Accessories . . . . . . . . . . . . . . . . .60
Step 15 — Check Belt Tension . . . . . . . . . . . . . . . . .60
• BELT FORCE — DEFLECTION METHOD
• BELT TENSION METHOD
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . .CL-1
SAFETY CONSIDERATIONS
Improper
installation,
maintenance, or use can cause explosion, fire, electrical shock or
other conditions which may cause personal injury or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory-authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloths for brazing operations and have a fire
extinguisher available. Read these instructions thoroughly and
follow all warnings or cautions attached to the unit. Consult local
building codes and appropriate national electrical codes (in USA,
Pg 1
48LC 08-12
®
(R-410A) Refrigerant
adjustment,
alteration,
5-2020
Replaces: 48LC-8-12-06SI
service,

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Summary of Contents for Carrier WeatherExpert 48LC Series

  • Page 1 WeatherExpert 48LC 08-12 ® Single Package Rooftop Gas Heat/Electric Cooling Unit with Puron (R-410A) Refrigerant ® Installation Instructions NOTE: Read the entire instruction manual before starting the SystemVu™ Controller (Factory-Installed Option) .31 installation. Integrated Staging Control (ISC) Board ..32 SAFETY CONSIDERATIONS .

  • Page 2: Electrical Shock Hazard

    ANSI/NFPA70, National Electrical Code (NEC); in Canada, CSA C22.1) for special requirements. DANGER It is important to recognize safety information. This is the safety- alert symbol . When you see this symbol on the unit and in ELECTRICAL SHOCK HAZARD instructions or manuals, be alert to the potential for personal Failure to follow this warning will result in personal injury or injury.

  • Page 3: Rated Indoor Airflow (Cfm)

    GENERAL WARNING See Fig. 1 for model number nomenclature. See Fig. 2 and 3 for FIRE HAZARD unit dimensional drawings. Figure 4 shows service clearance di- Failure to follow this warning could result in severe personal mensions. injury and/or property damage. Rated Indoor Airflow (cfm) Manifold pressure tap set screw must be tightened and -in.
  • Page 4 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...
  • Page 5 Fig. 2 — Unit Dimensional Drawing - Size 08 Unit...
  • Page 6 Fig. 2 — Unit Dimensional Drawing - Size 08 Unit (cont)
  • Page 7 Fig. 3 — Unit Dimensional Drawing - Size 09 and 12 Units...
  • Page 8 Fig. 3 — Unit Dimensional Drawing - Size 09 and 12 Units (cont)

  • Page 9: Installation

    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 42-in. (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall) 36-in.

  • Page 10: Curb-Mounted Installation

    Step 4 — Provide Unit Support Table 2 — Operating Weights ROOF CURB MOUNT UNITS LB (KG) Accessory roof curb details and dimensions are shown in Fig. 6. 48LC** Assemble and install accessory roof curb in accordance with in- Base Unit 1430 (650) 1534 (696) 1554 (705)
  • Page 11 Fig. 6 — Roof Curb Details - Size 08-12 Units...
  • Page 12 Step 5 — Field Fabricate Ductwork Step 6 — Rig and Place Unit NOTE: Cabinet return-air static pressure (a negative condition) When the unit is ready to be rigged and no longer will be lifted by shall not exceed 0.35 in. wg (87 Pa) with economizer or 0.45 in. a fork truck, the wood protector under the basepan must be re- wg (112 Pa) without economizer.

  • Page 13: Positioning On Curb

    POSITIONING ON CURB Step 7 — Convert to Horizontal and Connect Ductwork (when required) For full perimeter curbs CRRFCURB074A00 and 075A00, the clearance between the roof curb and the front and rear base rails Unit is shipped in the vertical duct configuration. Unit without fac- should be -in.

  • Page 14: Step 8 - Install Outside Air Hood

    SCREWS REMOVE HOOD PARTS CUT PLASTIC TIES (2) PLACES ECONOMIZER DUCT COVERS SHEET METAL FACE UP BASEPAN Fig. 14 — Economizer Hood Package Location ECONOMIZER HOOD ASSEMBLY NOTE: If the power exhaust accessory is to be installed on the Fig. 12 — Horizontal Duct Panels In Place unit, the hood shipped with the unit will not be used and must be discarded.

  • Page 15: Step 9 - Install Flue Hood

    Step 9 — Install Flue Hood The flue hood is shipped screwed to the basepan beside the burner PANEL compartment access panel. Remove the panel below the control box access panel to access the flue hood shipping location. Using screws provided, install flue hood and screen in location shown in Fig.

  • Page 16: Equipment Damage

    Table 5 — Natural Gas Manifold Pressure Ranges ” ELECTRICAL BULKHEAD ” ELECTRICAL CONNECTOR BULKHEAD UNIT MODEL UNIT SIZE HIGH FIRE LOW FIRE CONNECTOR 3.5 in. wg 2.0 in. wg 08, 09, 12 48LCD/E/S/R0 (872 Pa) (498 Pa) ” NPT GAS 48LCF/T0 ADAPTER 3.4 in.
  • Page 17 Check tightness of connector lock nuts before connecting gas pip- ing. Install a -in. NPT street elbow on the thru-base gas fitting. At- tach a -in. pipe nipple with minimum length of 16-in. (406 mm) 9” (229 mm) MIN (field-supplied) to the street elbow and extend it through the ac- cess panel at the gas support bracket.

  • Page 18: Step 11 - Install External Condensate Trap And Line

    NOTE: Pressure test the gas supply system after the gas supply (25 mm in 3 m) of run. Do not use a pipe size smaller than the piping is connected to the gas valve. The supply piping must be unit connection ( -in.).

  • Page 19: Fire Hazard

    If the field disconnect is larger than 100A, it must be attached to the unit using accessory CRDISBKT001A00 — disconnect switch bracket (see Fig. 31). Follow the instructions provided with this accessory. For smaller field disconnects, be sure to use -in.

  • Page 20: All Units

    Operation on improper line voltage or excessive phase imbal- cent of voltage imbalance. ance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty. max voltage deviation from average voltage % Voltage = 100 x...
  • Page 21 Fig. 34 — 48LC 08-12 Electro-mechanical Control Wiring Diagram...
  • Page 22 Fig. 35 — 48LC 08-12 RTU Open Control Wiring Diagram...
  • Page 23 Fig. 36 — 48LC 08-12 SystemVu™ Control Wiring Diagram...
  • Page 24 Fig. 37 — 48LC 08-12 Typical Power Wiring Diagram, Electromechanical and RTU Open Controls (208/230-v Unit Shown)
  • Page 25 Fig. 38 — 48LC 08-12 Typical Power Wiring Diagram, SystemVu™ Control (208/230-v Unit Shown)

  • Page 26: Units Without Factory-Installed Non-Fused Disconnect Or Hacr

    UNITS WITHOUT FACTORY-INSTALLED NON-FUSED DISCONNECT OR HACR When installing units, provide a disconnect switch of adequate size per NEC (National Electrical Code). 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. Do not cover unit informative plate if mounting the disconnect on the unit cabinet.

  • Page 27: Convenience Outlets

    9. Secure the handle to the painted cover with (2) screws and lock washers supplied. 10. Engaging the shaft into the handle socket, re-install (3) hex screws on the HACR enclosure. 11. Re-install the unit front panel. Fig. 41 — Handle and Shaft Assembly for NFD Fig.
  • Page 28 be connected at the line-side terminals on the unit-mounted non- fused disconnect; this will provide service power to the unit when the unit disconnect switch is open. Other connection methods will result in the convenience outlet circuit being de-energized when the unit disconnect switch is open.

  • Page 29: Factory-Option Thru-Base Connections (Elec- Trical Connections)

    GFCI RECEPTACLE NOT INCLUDED COVER - WHILE-IN-USE WEATHERPROOF 1/2-in. ELECTRICAL BULKHEAD CONNECTOR 1-1/2-in. ELECTRICAL BULKHEAD CONNECTOR GASKET Fig. 49 — Thru-the-Base Option, Shipping Position BASEPLATE FOR GFCI RECEPTACLE 1. Remove the “L” bracket assembly from the unit. Fig. 47 — Weatherproof Cover Installation 2.

  • Page 30: Field Control Wiring

    THERMOSTAT tact with the condenser coil. See Fig. 52. Install a Carrier-approved accessory thermostat according to in- stallation instructions included with the accessory. For complete economizer function and 3-stage compressor operation select a three-stage cooling thermostat.

  • Page 31: Rtu Open Controller (Factory-Installed Option)

    SystemVu™ Controller (Factory-Installed Option) NOTE: 48LC**08/09/12 units require a 3-stage cooling ther- For details on operating 48LC**08/09/12 units equipped with the mostat device and are not compatible with Carrier’s Edge ® factory-installed SystemVu control option, refer to 48/50LC 04-26 thermidistat.

  • Page 32: Integrated Staging Control (Isc) Board

    Integrated Staging Control (ISC) Board Indoor Fan Power Phase Phase Auxilary Condensate Economizer “On” Status Board Plug Monitor Monitor Shutdown Overflow Relay Relay Remote Shutdown Control Smoke Shutdown Smoke Alarm Control Occupancy Low Ambient Outdoor Fan Control Status Code LEDs Compressors Reheat Thermostat...

  • Page 33: Isc Board - Sequence Of Operation

    General The Carrier Integrated Staging Control (ISC) is intended for use NUMBER OF NUMBER OF with a standard thermostat or direct digital controls (DDC) capa-...

  • Page 34: Factory Option)

    fan motor will continue to operate for an additional 45 seconds OF SPEED then stop. If the over temperature limit opens after the indoor mo- tor is stopped, but within 10 minutes of W1 becoming inactive, on SELECT the next cycle the time will be extended by 15 seconds. The maxi- mum delay is 3 minutes.

  • Page 35: Specifications

    SPECIFICATIONS ENVIRONMENTAL W7220 Economizer Module Operating Temperature The module is designed for use with 2 to 10 vdc or bus communi- –40°F to 150°F (–40°C to 65°C). cating actuator. The module includes terminals for CO sensor, Exception of display operation down to –4°F (–20°C) with full Mixed Air sensor, and an Outdoor Dry Bulb sensor.
  • Page 36 Table 10 — Economizer Module (Left Hand Terminal Blocks) LABEL TYPE DESCRIPTION Top Left Terminal Block 20k NTC Mixed Air Temperature Sensor (Polarity and COM Insensitive Connection) 20k NTC Outdoor Air Temperature Sensor (Polarity and COM Insensitive Connection) S-BUS S-BUS (Sylk Enthalpy Control Sensor S-BUS Bus)

  • Page 37: Interface Overview

    4. Press the (Enter) button to display the value of the SENSOR currently displayed item. 5. Press the ▲ button to increase (change) the displayed (HOT) BLACK parameter value. 6. Press the ▼ button to decrease (change) the displayed YELLOW parameter value.
  • Page 38 Table 14 — W7220 Menu Structure* PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † FIRST STAGE COOLING DEMAND (Y1–IN) ECON AVAIL YES/NO YES = economizing available; the system can use outside air for free cooling when required FIRST STAGE COOLING RELAY OUTPUT ECONOMIZING YES/NO...
  • Page 39 Table 14 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † EXHAUST STAGE 2 RELAY OUTPUT Output of AUX1 O terminal Displays ON when damper position reaches programmed EXH2 OUT ON/OFF percentage set point.
  • Page 40 Table 14 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † EXHAUST FAN STAGE 1 SETPOINT Set point for OA damper position when exhaust fan 1 is powered 0 to 100%; by the economizer.
  • Page 41 Table 14 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † NONE Used for alarm for when the DA air temperature is too high. Sets 70°F to 180°F DA HI ALM 80°F (27°C) upper range of alarm;...
  • Page 42 Table 14 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † Check if outdoor temperature is below the LOW Temp Lockout on set point menu. Check if Mixed air temperature on STATUS FREEZE ALARM menu is below the Lo Set point on Advanced menu.
  • Page 43 Table 16 — Dry Bulb Operation without DCV (CO Sensor) — 1 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED VENTILATION (DCV) ECONOMIZE High 0-v/Off 0-v/Off MIN POS Closed High 24-v/On 0-v/Off MIN POS Closed High...
  • Page 44 Table 19 — Enthalpy Operation with DCV (CO Sensor) — 1 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED VENTILATION (DCV) ECONOMIZE High 0-v/Off 0-v/Off Closed VENTMIN High 24-v/On 0-v/Off Closed VENTMIN High 24-v/On 24-v/On...
  • Page 45 Table 21 — Dry Bulb Operation With DCV (CO Sensor) — 2 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE 0v/Off 0v/Off VENTMIN Closed 24v/On 0v/Off VENTMIN Closed HIGH 24v/On 24v/On VENTMIN Closed...

  • Page 46: Enthalpy Settings

    Table 23 — Enthalpy Operation With DCV (CO Sensor) — 2 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE 0v/Off 0v/Off VENTMIN Closed 24v/On 0v/Off VENTMIN Closed HIGH 24v/On 24v/On VENTMIN Closed 0v/Off...

  • Page 47: Troubleshooting

    ECONOMIZING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE Fig. 63 — Single Enthalpy Curve Boundaries Table 25 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY...

  • Page 48: Staged Air Volume (Sav™) With Variable Fre- Quency Drive

    Clearing Alarms Once the alarm has been identified and the cause has been re- moved (e.g. replaced faulty sensor) the alarm can be cleared from the display. To clear an alarm, perform the following: 1. Navigate to the desired alarm. 2.

  • Page 49: Alphanumeric Display

    Com. 1-20 Motor Power ALPHA NUMERIC [2] 0.12KW-0.16HP DISPLAY Setup 1 Warn. Status Quick Main Alarm MENU KEY Menu Menu Menu Com. LED: Flashes when bus communications is Com. communicating. Green LED/On: Control selection is working. NAVIGATION KEYS Yellow LED/Warn.: Indicates a warning. Flashing Red LED/Alarm: Indicates an alarm.

  • Page 50: Program The Vfd For 3 Discrete Indoor Fan Speeds

    Male Connector - connect to VFD Front Panel Fig. 70 — Align Bottom of VFD Keypad with Opening in VFD Front Panel 2. Push the top of the VFD keypad into the variable fre- quency drive as shown in Fig. 71. Female Connector - connect to back of VFD Remote Keypad...
  • Page 51 3. Clearing Alarm 060: External Interlock: a. Press the Menu key twice to position the ▼ (triangle icon) over Main Menu; the display changes to: Select language English 0—** Operation / Display [0] English 1—** Load and Motor SETUP 1 b.
  • Page 52 d. Press ▼ (Down Arrow) twice to reach the following e. Press OK, the following display appears: display: 1-71 Start Delay 2.0s 1—1* Motor Selection f. Press OK to highlight the number and then use the ▲ 1—2* Motor Data and ▼...

  • Page 53: Setting Limits

    c. Press OK, the following display appears: e. Press ▼ (Down Arrow) once, the following display appears: 3—0* Reference Limits 3-42 Ramp 1 Ramp Down Time 3—1* References 3.00s d. Press OK again, the following display appears: f. Press OK again to highlight the bottom row and use the ▲...
  • Page 54 c. Press OK, the following display appears: 12. Setting Reset Mode and RFI Filter: a. Press the Back key until the following display appears: 5—0* Digital I/O mode 5—1* Digital Inputs 0—** Operation / Display d. Press ▼ (Down Arrow) once to move the highlight to 1—** Load and Motor the bottom row and then press OK.
  • Page 55 MOTOR MOTOR CURRENT NOMINAL FREQUENCY SETTINGS TYPE POWER VOLTAGE (MUST-HOLD SPEED (Hz) AMPS) (RPM) Motor Motor Voltage Carrier 0-03 0-06 1-20 1-22 1-23 1-24 1-25 Option 208/230V HD56FR233 HK30WA370 131L9795 [102] 1695 460V HD56FR463 HK30WA376 131L9863 [122] 1690 575V HD56FR579 HK30WA382 131N0225...
  • Page 56 MOTOR CURRENT NOMINAL FREQUENCY SETTINGS TYPE POWER VOLTAGE (MUST-HOLD SPEED (Hz) AMPS) (RPM) Motor Motor Option Voltage Carrier 0-03 0-06 1-20 1-22 1-23 1-24 1-25 208/230V HD56FR233 HK30WA370 131L9795 [102] 1695 460V HD56FR463 HK30WA376 131L9863 [122] 1690 575V HD56FR579 HK30WA382 131N0225...
  • Page 57 Table 27 — VFD Unit Parameters - 48LC 09 Units (cont) START SPEED MOTOR FLYING PRESET DELAY THERMAL START REFERENCE (SEC) FUNCTION PROTECTION (Hz) Motor Voltage 1-71 1-73 1-82 1-90 3-10 [0] 3-10 [1] 3-10 [2] 3-10 [3] 3-10 [4] 3-10 [5] 3-10 [6] 3-10 [7] Option 208/230V 66.50% 66.50%...
  • Page 58 MOTOR MOTOR CURRENT NOMINAL FREQUENCY SETTINGS TYPE POWER VOLTAGE (MUST-HOLD SPEED (Hz) AMPS) (RPM) Motor Motor Voltage Carrier 0-03 0-06 1-20 1-22 1-23 1-24 1-25 Option 208/230V HD56FE653 HK30WA371 131L9796 [102] [10] 1680 460V HD56FE653 HK30WA377 131L9864 [122] [10] 1680...

  • Page 59: Completing Installation Of Return-Air Smoke Sensor

    Smoke Detectors RETURN AIR Smoke detectors are available as factory-installed options on SMOKE DETECTOR 48LC 08-12 units. Smoke detectors may be specified for supply (AS SHIPPED) air only, for return air without or with economizer, or in combina- tion of supply air and return air. Return air smoke detectors are ar- ranged for vertical return configurations only.

  • Page 60: Smoke Detectors

    Step 13 — Adjust Factory-Installed Options BELT DEFLECTION FORCE - SEE TABLE 1 SMOKE DETECTORS Smoke detector(s) will be connected at the Integrated Staging DEFLECTION = BELT SPAN Control (ISC) board, at terminals marked “Smoke Shutdown”. Remove jumper JMP 3 when ready to energize unit. STRAIGHT EDGE Step 14 —...
  • Page 62 © 2020 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480301-01 Printed in U.S.A. Form 48LC-8-12-07SI Pg 62 5-2020 Replaces: 48LC-8-12-06SI...

  • Page 63: Preliminary Information

    START-UP CHECKLIST FOR 48LC SINGLE PACKAGE ROOFTOP UNIT (Remove and Store in Job File) NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preced- ing sections of this Installation Instruction document.

  • Page 64: Humidi-Mizer

    10. Restore set-points for thermostat and humidistat (Y/N) _____ REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS. © 2020 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480301-01 Printed in U.S.A.

This manual is also suitable for:

Weatherexpert 48lc 008 seriesWeatherexpert 48lc 009 seriesWeatherexpert 48lc 012 series

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