Carrier WeatherExpert 50LC14 Installation Instructions Manual
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Carrier WeatherExpert 50LC14 Installation Instructions Manual

Single package rooftop cooling only with puron(r-410a) refrigerant
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CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . 19
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . 19
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . 19
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . 24
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . 24
25
Step 9 - Assemble Barometric Hood . . . . . . . . . . . 26
CONFIGURATION)
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500292-01
Installation Instructions
Page
Printed in U.S.A.
Form 50LC-14-26-06SI
50LC14-26 Single Package Rooftop
with Puron
®
• ELECTRIC HEATERS
• HUMIDI-MIZER® SYSTEM CONTROL
CONNECTIONS
Integrated Staging Control (ISC) . . . . . . . . . . . . . . . 44
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Step 13 - Install Accessories . . . . . . . . . . . . . . . . .78
Step 14 - Check Belt Tension . . . . . . . . . . . . . . . . .78
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . .79
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . .CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters and replacing filters. All other operations
should be performed by trained service personnel. When working
on air-conditioning equipment, observe precautions in the
literature, tags and labels attached to the unit, and other safety
precautions that may apply.
Follow all safety codes, including ANSI (American National
Standards Institute) Z223.1. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire
extinguisher available for all brazing operations.
It is important to recognize safety information. This is the safety-
alert symbol
. When you see this symbol on the unit and in
instructions or manuals, be alert to the potential for personal
injury.
Pg 1
WeatherExpert
Cooling Only
(R-410A) Refrigerant
1-2021
Replaces: 50LC-14-26-05SI
®

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Summary of Contents for Carrier WeatherExpert 50LC14

  • Page 1: Table Of Contents

    WeatherExpert ® 50LC14-26 Single Package Rooftop Cooling Only with Puron (R-410A) Refrigerant ® Installation Instructions • ELECTRIC HEATERS CONTENTS • HUMIDI-MIZER® SYSTEM CONTROL Page CONNECTIONS SAFETY CONSIDERATIONS ....1 RTU Open Controller (Factory-Installed Option) .

  • Page 2: Model Number Nomenclature And

    Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used with the safety-alert symbol. CAUTION DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards PERSONAL INJURY HAZARD which could result in personal injury or death. CAUTION is used Failure to follow this caution may result in personal injury.
  • Page 3 Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit Heat Type Packaging 50 - Electric Cooling 0 = Standard Packaged Rooftop 1 = LTL ® Electrical Options Model Series - WeatherExpert LC - Ultra High Efficiency A = None B = HACR Circuit Breaker C = Non-Fused Disconnect...
  • Page 4 Fig. 2 — 50LC Vertical Airflow (Size 14)
  • Page 5 Fig. 3 — 50LC Horizontal Airflow (Size 14)
  • Page 6 Fig. 4 — 50LC Back View and Condensate Drain Location (Size 14)
  • Page 7 Fig. 5 — 50LC Corner Weights and Clearances (Size 14)
  • Page 8 Fig. 6 — 50LC Bottom View (Size 14)
  • Page 9 Fig. 7 — 50LC Vertical Airflow (Sizes 17-20)
  • Page 10 Fig. 8 — 50LC Horizontal Airflow (Sizes 17-20)
  • Page 11 Fig. 9 — 50LC Back View and Condensate Drain Location (Sizes 17-20)
  • Page 12 Fig. 10 — 50LC Corner Weights and Clearances (Sizes 17-20)
  • Page 13 Fig. 11 — 50LC Bottom View (Sizes 17-20)
  • Page 14 Fig. 12 — 50LC Vertical Airflow (Sizes 24-26)
  • Page 15 Fig. 13 — 50LC Horizontal Airflow (Sizes 24-26)
  • Page 16 Fig. 14 — 50LC Back View and Condensate Drain Location (Sizes 24-26)
  • Page 17 Fig. 15 — 50LC Corner Weights and Clearances (Sizes 24-26)
  • Page 18 Fig. 16 — 50LC Bottom View (Sizes 24-26)

  • Page 19: Installation

    Table 2 — Operating Weights UNIT LB (KG) 50LC-* Base Unit 1754 (797.3) 1996 (907.3) 2102 (955.7) 2248 (1022.0) 2393 (1087.6) Economizer 246 (112) 246 (112) 246 (112) 246 (112) 246 (112) Powered Outlet 35 (16) 35 (16) 35 (16) 35 (16) 35 (16) Curb...

  • Page 20: Slab Mount (Horizontal Units Only)

    Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb and not to the unit. The accessory thru-the-base power connection package must be in- stalled before the unit is set on the roof curb. If electric and control wiring is to be routed through the basepan, remove knockouts in basepan located in control box area of access panel;...
  • Page 21 Fig. 19 — Roof Curb Details - 14 Size Unit...
  • Page 22 Fig. 20 — Roof Curb Details - 17 and 20 Size Units...
  • Page 23 Fig. 21 — Roof Curb Details - 24 and 26 Size Units...

  • Page 24: Step 5 - Field Fabricate Ductwork

    Step 5 — Field Fabricate Ductwork Cabinet return-air static pressure (a negative condition) shall CAUTION not exceed 0.35 in. wg (87 Pa) with economizer or without economizer. PROPERTY DAMAGE HAZARD For vertical ducted applications, secure all ducts to roof curb and Failure to follow this caution may result in damage to roofing building structure.

  • Page 25: Positioning On Curb

    POSITIONING ON CURB Position unit on roof curb so that the following clearances are maintained: -in. (6 mm) clearance between the roof curb and HOOD TOP the base rail inside the right and left, -in. (12 mm) clearance SHIPPING POSITION between the roof curb and the base rail inside the front and back.

  • Page 26: Step 9 - Assemble Barometric Hood

    screen into place, and then slide them back into pocket created in the filter support (Item #1). Repeat this for each air screen (see Fig. 27). See Fig. 28 for completed hood assembly. APPLY SEAL STRIP TO THE BACK OF THIS FLANGE APPLY SEAL STRIP TO THE BACK APPLY SEAL STRIP...

  • Page 27: Barometric Hood

    Fig. 34 — Relief Damper Fig. 31 — Barometric Hood Box Parts Location Cut a 16 in. x 36 in. opening in the return duct for the relief 3. Install parts as shown in the following exploded view damper (see Fig. 34). (Fig.

  • Page 28: Step 10 - Economizer - Horizontal Airflow Units

    CONDENSATE DRAIN CONNECTION Fig. 38 — Condensate Drain Pan Connection The piping for the condensate drain and external trap can be com- pleted after the unit is in place. Hand-tighten fittings to the drain Fig. 36 — CRBARHOD001A00 Hood Sides and Top pan fitting.

  • Page 29: Field Power Supply

    FIELD POWER SUPPLY Field power wires are connected to the unit at line-side pressure lugs on the terminal block (see wiring diagram label for control If equipped with optional powered convenience outlet: the power box component arrangement) or at factory-installed option non- source leads to the convenience outlet’s transformer primary are fused disconnect switch or HACR breaker.
  • Page 30 Fig. 42 — 50LC 14-26 Electro-Mechanical Control Wiring Diagram...
  • Page 31 Fig. 43 — 50LC 14-26 RTU Open Control Wiring Diagram...
  • Page 32 Fig. 44 — 50LC 14-26 SystemVu™ Control Wiring Diagram...
  • Page 33 Fig. 45 — Typical Power Wiring Diagram Electro-Mechanical and RTU Open Controls, 50LC 14-24 Units 208/230V Shown...
  • Page 34 Fig. 46 — Typical Power Wiring Diagram Electro-Mechanical and RTU Open Controls, 50LC 15-24 Units 460V, 575V Shown...
  • Page 35 Fig. 47 — Typical Power Wiring Diagram, SystemVu™ Controls, 50LC Unit 208/230V Shown...
  • Page 36 Fig. 48 — Typical Power Wiring Diagram, SystemVu™ Controls, 50LC Unit 460V, 575V Shown...

  • Page 37: Units Without Factory-Installed Non-Fused Disconnect Or Hacr

    UNITS WITHOUT FACTORY-INSTALLED NON-FUSED Field-Install the HACR Shaft and Handle DISCONNECT OR HACR 1. Open the control box panel. 2. Make sure the HACR shipped from the factory is at OFF When installing units, provide a disconnect switch per NEC position (the white arrow pointing at OFF).

  • Page 38: Convenience Outlets

    Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty. Example: Supply voltage is 230-3-60 Disconnect per NEC...
  • Page 39 Two types of convenience outlets are offered on 50LC models: non unit-powered and unit-powered. Both types provide a GFCI RECEPTACLE COVER - WHILE-IN-USE NOT INCLUDED 125-v GFCI (ground-fault circuit interrupter) duplex receptacle WEATHERPROOF rated at 15A behind a hinged waterproof access cover, located on the end panel of the unit.

  • Page 40: Hacr Amp Rating

    NOTICE/AVIS Convenience Outlet Utilization Maximum Intermittent Use 15 - Amps Maximum Continuous Use 8 - Amps Observe a 50% limit on the circuit Loading above 8 - Amps Utilisation de la prise utilitaire Usage intermittent maximum 15 - Amps Usage continu maximum 8 - Amps Observez une limite de 50% sur le circuit Chargement au-dessus de 8 - Amps 50HE501288...

  • Page 41: Connections

    THERMOSTAT wire behind the corner post utilizing the factory provided wire ties Install a Carrier approved accessory thermostat according to in- secured to the control box. This will ensure separation of the field stallation instructions included with the accessory. For complete low voltage wire and the high voltage circuit.
  • Page 42 Space Humidistat (HL38MG029), a Wall Mount Space Humidi- ty Sensor (33ZCSENSRH-01), or a Duct Mount Humidity Sen- sor (33ZCSENDRH-01). NOTE: 50LC14-26 units require a 3-stage cooling thermostat de- vice and are not compatible with Carrier’s Edge Pro thermidistat. ® ELECTRIC HEATER OPENING Fig.

  • Page 43: Rtu Open Controller (Factory-Installed Option)

    Connecting the Carrier Humidistat (HL38MG029) RTU Open Controller (Factory-Installed Option) 1. Route the humidistat 2-conductor cable (field-supplied) For details on operating 50LC*014-26 units equipped with the through the hole provided in the unit corner post. factory-installed RTU Open option refer to 48/50LC07-26 Factory 2.

  • Page 44: Integrated Staging Control (Isc)

    Module can shutdown the unit by removing Jumper 3 and wiring to the Smoke Shutdown terminal. The Smoke Alarm terminal on The Carrier Integrated Staging Control (ISC) is intended for use the ISC Board provides a pass thru connection should a smoke with a standard thermostat, direct digital controls (DDC) capable alarm signal be connected.
  • Page 45 Table 3 — ISC Board LEDs Status Code Descriptions LED INDICATION ERROR # ERROR NAME LED01 LED02 LED03 LED04 LED05 Check Smoke Detector/PMR/AUX Check HPS/LPS/COFS Call for Y3 with no call for Y1. Check Y1 wiring. Call for Y3 with no call for Y1/Y2. Check Y1 wiring. Call for Y2 with no call for Y1.

  • Page 46: Economi$Er® X (Factory-Installed Option)

    Low Ambient Cooling Operation Down to 40°F (4°C) controlled indoor fan will operate at high speed regardless of the heating demand. In Low Ambient RTU conditions when the temperature is be- tween 55°F (13°C) and 40°F (4°C), the Low Ambient Switch Economi$er X (Factory-Installed Option) ®...
  • Page 47 To use the keypad when working with menus: To use the keypad when working with Setpoints, System and Ad- vanced Settings, Checkout tests and Alarms: • Press the ▲ (Up arrow) button to move to the previous menu. 1. Navigate to the desired menu. •...
  • Page 48 Table 7 — W7220 Menu Structure* PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND EXPANDED PARAMETER NAME/NOTES † VALUE INCREMENT ECONOMIZING AVAILABLE ECON AVAIL YES/NO YES = economizing available; the system can use outside air for free cool- ing when required ECONOMIZING ACTIVE ECONOMIZING YES/NO...
  • Page 49 Table 7 — W7220 Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT † 1 to 65535 Displays number of times actuator has cycled. ACT COUNT 1 cycles equals accrued 180 deg. of actuator movement in any direction. OK/Alarm (on Alarm Displays ERROR if voltage or torque is below actuator range.
  • Page 50 Table 7 — W7220 Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT † INSTALL 01/01/10 Display order = MM/DD/YY Setting order = DD, MM, then YY UNITS DEG °F °F or °C Sets economizer controller in degrees Fahrenheit or Celsius EQUIPMENT CONV Conventional or HP...

  • Page 51: W7220 Economizer Module Wiring

    Table 7 — W7220 Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT † DAMPER VMIN .HS Positions OA damper to VMIN High Speed position. DAMPER VMAX .HS Positions OA damper to VMAX High Speed position. DAMPER OPEN Position damper to the full open position.
  • Page 52 W7220 Controller NOTE: The bottom 4 Pin actuator header is not used Left Terminal Right Terminal Block Label Block Label Fig. 69 — W7220 Wiring Terminals Table 8 — Economizer Module - Left Hand Terminal Table 9 — Economizer Module - Right Hand Terminal Blocks Blocks LABEL...
  • Page 53 20-K OHM PNO HH79NZ007 AUX2-I TSTAT W1 20-K OHM OCCUPANCY --- TSTAT G PNO HH79NZ007 W7220 GROUND E- GND GRN/YEL S - BUS CONTROLLER POWER EXHAUST RELAY EXH 1 S - BUS AUX1-O IAQ - 2 - 10 SENSOR IAQ COM Y2 - I TSTAT Y3 IAQ 24V+...

  • Page 54: Economizer Control Configurations

    ECONOMIZER CONTROL CONFIGURATIONS Refer to Table 10 for ENTH CURVE setpoint values. The W7220 calculates the enthalpy and dew point using the OA Enthalpy Changeover Control temperature and humidity input from the OA enthalpy sensor. Economizer changeover based on outdoor air enthalpy requires an When the OA temperature, OA humidity and OA dew point are outdoor air enthalpy sensor to replace the OAT sensor.
  • Page 55 Demand Controlled Ventilation (DCV) During operation at Low fan speed, the damper setpoint limits change to VENTMIN L and VENTMAX L. These settings are Demand Controlled Ventilation (DCV) function requires a space higher than the comparable High speed settings and cause the out- air CO sensor be connected to the W7220 controller.
  • Page 56 HIGH SPEED FAN LOW SPEED FAN VENTMAX L VENTMAX H VENTILATION FOR PEOPLE VENTILATION FOR PEOPLE VENTMIN L VENTMIN H VENTILATION FOR SOURCES VENTILATION FOR SOURCES INSIDE OUTSIDE CO DIFFERENTIAL INSIDE OUTSIDE CO DIFFERENTIAL Fig. 74 — DCV 2-Speed System Setpoints (Same Ventilation CFM at Both Speeds) OCCUPANCY TERMINALS CUT JUMPER JMP1...

  • Page 57: Economiser Hardware

    ECONOMISER HARDWARE Outside Air Temperature Sensor EconoMi$er X systems equipped with outdoor dry bulb tem- ® Actuators perature changeover control include a 20k ohm analog sensor to The EconoMi$er X damper actuators are direct-coupled types ® measure Outdoor Air Temperature (OAT). This is the same sensor with spring-return.

  • Page 58: Operating Sequences

    Table 14 — Enthalpy Control Sensor DIP Switch Table 15 — Supply Fan Speed Logic Without Settings Economizer DIP SWITCH POSITIONS FOR SWITCHES 1, 2, AND 3 SUPPLY FAN MOTOR SPEED TSTAT OUTPUT HIGH G/OCC 24 V 24 V 24 V 24 V LEGEND 24 V...
  • Page 59 Table 17 — W7220 Input/Output with Demand Controlled Ventilation (IDCV) INPUTS OUTPUTS OCCUPANCY MECHANICAL DEMAND OUTSIDE AIR SPED COOLING STAGE CONTROLLED GOOD TO Y1-I Y2-I OUTSIDE AIR DAMPER POSITION (REF)* VENTILATION ECONOMIZE Y1-O/1ST Y2-O/2ND OCC YES OCC NO 0 V/Off 0 V/Off VENTMIN L Closed...

  • Page 60: W7220 Economizer Setup And Configuration

    As space temperature falls, the thermostat will remove its call for W7220 ECONOMIZER SETUP AND CONFIGURATION second stage cooling; ISC terminal Y2 call is removed. The sup- Before being placed into service, the W7220 Economizer module ply fan motor remains High Speed. The outside air damper limit is must be setup and configured for the installed system according to repositioned to between MIN POS L and 100% open.

  • Page 61: Troubleshooting

    Checkout TROUBLESHOOTING For checkout, review the Status of each configured parameter by Power Up Delay observing the scrolling display from the Screensaver mode or by Upon power up (or after a power outage or brownout) the W7220 entering the STATUS menu. controller module begins a 5-minute power up delay before en- Use the Checkout menu (see Table 7 on page 48) to test the damp- abling mechanical cooling.
  • Page 62 Table 18 — Operating Issues and Concerns ISSUE OR CONCERN POSSIBLE CAUSE AND REMEDY My outdoor temperature reading on Check the sensor wiring: the STATUS menu is not accurate. • Enthalpy sensors are to be wired to the S-Bus terminals. •...

  • Page 63: Control Setpoint And Configuration Log

    CONTROL SETPOINT AND CONFIGURATION LOG Project Name/Location: ____________________________________________________________ Model Number: ___________________________________________________________________ Serial Number: ___________________________________________________________________ Date: ___________________________________________________________________________ Technician: ______________________________________________________________________ Menu Tables: 1. SYSTEM SETUP 2. ADVANCED SETUP 3. SETPOINTS Menu 1: System Setup PARAMETER PARAMETER PROJECT PARAMETER DEFAULT RANGE AND NOTES VALUE VALUE INCREMENT...
  • Page 64 Menu 2: Advanced Setup PARAMETER PARAMETER PROJECT PARAMETER DEFAULT RANGE AND NOTES VALUE VALUE INCREMENT MA LO SET 45°F (7°C) 35 to 55°F (2 to 13°C); SUPPLY AIR TEMPERATURE LOW LIMIT incremented by 1° Temperature to achieve Freeze Protection (close damper and alarm if temperature at SAT location falls below setup value) FREEZE POS CLO or MIN...
  • Page 65 Menu 3: Setpoints PARAMETER PARAMETER PROJECT PARAMETER DEFAULT RANGE AND NOTES VALUE VALUE INCREMENT MAT SET 53°F (12°C) 38 to 65°F (3 to 18°C); SUPPLY AIR SETPOINT increment by 1° Setpoint determines where the economizer will modulate the OA damper to maintain the supply air temperature. See Table 7 on page 48, Menu Note 2.

  • Page 66: Staged Air Volume (Sav™) With Variable Frequency

    Staged Air Volume (SAV™) with Variable Fre- quency Drive The Staged Air Volume (SAV) system utilizes a Variable Frequen- cy Drive (VFD) to automatically adjust the indoor fan motor speed in sequence with the unit’s ventilation, cooling and heating operation. Per ASHRAE 90.1-2016 standard, during the first stage of cooling operation the SAV system will adjust the fan motor to provide 66% of the design airflow rate for the unit.
  • Page 67 Hand Auto Reset 1-20 Motor Power ALPHA NUMERIC [2] 0.12KW-0.16HP DISPLAY Setup 1 Status Quick Main MENU KEY Menu = Hand On key: Starts the motor and enables control of the Menu Menu variable frequency drive (VFD) via the VFD Keypad option. NOTE: Please note that terminal 27 Digital Input (5-12 Ter- Com.
  • Page 68 Male Connector - connect to VFD Front Panel Fig. 85 — Secure Keypad in Place Using the Cable to Connect the Keypad with the VFD The VFD keypad can be connected to the variable frequency drive via the cable included with the Multi-Speed VFD display kit (P/N CRDISKIT002A00).
  • Page 69 b. Press the ▼ (Down arrow key) until the following display appears: 0 —** Limits/Warnings Select language English 5 —** Digital In/Out [0] English c. Press OK. The display changes to: SETUP 1 Status Quick Main Menu 5 —0* Digital I/O Mode Menu Menu 5 —1* Digital Inputs...
  • Page 70 e. Press OK. The following display appears: f. Press OK to highlight the number; then use the ▲ (Up arrow) and ▼ (Down arrow) keys to select the number provided in Tables 19-23 beginning on page 73. 1 —20 Motor Power Press OK again to set the selected value.
  • Page 71 c. Press OK. The display changes to: e. Press ▼ (Down arrow key) once. The following dis- play appears: 3 —0* Reference Limits 3 —42 Ramp 1 Ramp Down Time 3 —1* References d. Press OK again. The following display appears: 3.00s f.
  • Page 72 b. Press ▼ (Down arrow key) once. The following dis- g. Press ▼ (Down arrow key) once to move the high- play appears: light to the bottom row, then press OK. The following display appears: 4—** Limits/Warnings 6 —15 Set Max Reference 5—** Digital In/Out [60 Hz] c.
  • Page 73 MOTOR MOTOR REGIONAL GRID MOTOR MOTOR CURRENT NOMINAL FREQUENCY MOTOR MOTOR VFD MFR SETTINGS TYPE POWER VOLTAGE (MUST-HOLD SPEED OPTION VOLTAGE CARRIER (Hz) AMPS) (RPM) 0-03 0-06 1-20 1-22 1-29 1-24 1-25 208/230V HD58FE654 HK30WA371 131L9796 [102] [10] 1735 460V...
  • Page 74 REGIONAL GRID MOTOR MOTOR CURRENT NOMINAL FREQUENCY MOTOR MOTOR VFD MFR SETTINGS TYPE POWER VOLTAGE (MUST-HOLD SPEED OPTION VOLTAGE CARRIER (Hz) AMPS) (RPM) 0-03 0-06 1-20 1-22 1-29 1-24 1-25 208/230V HD58FE654 HK30WA371 131L9796 [102] [10] 1735 460V HD58FE654 HK30WA377...
  • Page 75 MOTOR MOTOR REGIONAL GRID MOTOR MOTOR CURRENT NOMINAL FREQUENCY MOTOR MOTOR VFD MFR SETTINGS TYPE POWER VOLTAGE (MUST-HOLD SPEED OPTION VOLTAGE CARRIER (Hz) AMPS) (RPM) 0-03 0-06 1-20 1-22 1-29 1-24 1-25 208/230V HD60FE656 HK30WA372 131L9797 [102] [11] 11.7 1750...
  • Page 76 MOTOR MOTOR REGIONAL GRID MOTOR MOTOR CURRENT NOMINAL FREQUENCY MOTOR MOTOR VFD MFR SETTINGS TYPE POWER VOLTAGE (MUST-HOLD SPEED OPTION VOLTAGE CARRIER (Hz) AMPS) (RPM) 0-03 0-06 1-20 1-22 1-29 1-24 1-25 208/230V HD60FK657 HK30WA373 131L9798 [102] [14] 21.2 1760...
  • Page 77 MOTOR MOTOR REGIONAL GRID MOTOR MOTOR CURRENT NOMINAL FREQUENCY MOTOR MOTOR VFD MFR SETTINGS TYPE POWER VOLTAGE (MUST-HOLD SPEED OPTION VOLTAGE CARRIER (Hz) AMPS) (RPM) 0-03 0-06 1-20 1-22 1-29 1-24 1-25 208/230V HD60FK657 HK30WA373 131L9798 [102] [14] 21.2 1760...

  • Page 78: Smoke Detectors

    Smoke Detectors Smoke detectors are available as factory-installed options on 50LC 14-26 models. Smoke detectors may be specified for supply air only, for return air without or with economizer, or in combina- tion of supply air and return air. The unit is factory-configured for immediate smoke detector shutdown operation;...

  • Page 79: Pre-Start And Start-Up

    Table 1 BELT DEFLECTION FORCE (LBS) BELT SMALLEST DEFLECTION = BELT SPAN UNNOTCHED CROSS SHEAVE NOTCHED BELTS BELTS SECTION DIAMETER STRAIGHT USED USED EDGE 3.0-3.6 SCREW A, AX 3.8-4.8 SCREW 5.0-7.0 3.4-4.2 — — B, BX 4.4-5.6 10.5 5.8-8.6 12.6 Table 2 TORQUE ALL SHEAVE SET SCREWS TO 110-130 in.
  • Page 82 © 2021 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500292-01 Printed in U.S.A. Form 50LC-14-26-06SI Pg 82 1-2021 Replaces: 50LC-14-26-05SI...

  • Page 83: Start-Up Checklist

    START-UP CHECKLIST FOR 50LC14-26 SINGLE PACKAGE ROOFTOP COOLING ONLY (REMOVE AND USE FOR 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 84 10. Restore set-points for thermostat and humidistat (Y/N) _____ REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS. © 2021 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500292-01 Printed in U.S.A.

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