Carrier WeatherExpert 50LC 07 Series Installation Instructions Manual
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Carrier WeatherExpert 50LC 07 Series Installation Instructions Manual

Single package rooftop cooling only with r-410a refrigerant
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NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Step 1 — Plan for Unit Location . . . . . . . . . . . . . . . . . 6
• ROOF MOUNT
Step 2 — Plan for Sequence of Unit Installation . . . . 7
• CURB-MOUNTED INSTALLATION
• PAD-MOUNTED INSTALLATION
• FRAME-MOUNTED INSTALLATION
Step 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 4 — Provide Unit Support . . . . . . . . . . . . . . . . . . 7
• ROOF CURB MOUNT
• SLAB MOUNT (HORIZONTAL UNITS ONLY)
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT)
Step 5 — Field Fabricate Ductwork . . . . . . . . . . . . . . 9
• FOR UNITS WITH ACCESSORY OR OPTIONAL
ELECTRIC HEATERS
Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . 9
• POSITIONING ON CURB
Step 7 — Convert to Horizontal and Connect
Ductwork (when required). . . . . . . . . . . . . . . . . . . 10
Step 8 — Install Outside Air Hood . . . . . . . . . . . . . . 11
• ECONOMIZER HOOD PACKAGE REMOVAL AND
SETUP - FACTORY OPTION
• ECONOMIZER HOOD
Step 9 — Install External Condensate Trap and
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Step 10 — Make Electrical Connections . . . . . . . . . 12
• FIELD POWER SUPPLY
• UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT OR HACR
• UNITS WITHOUT FACTORY-INSTALLED NON-
FUSED DISCONNECT OR HACR
• ALL UNITS
• CONVENIENCE OUTLETS
• HACR
• FACTORY-OPTION THRU-BASE CONNECTIONS
• UNITS WITHOUT THRU-BASE CONNECTIONS
• FIELD CONTROL WIRING
• THERMOSTAT
• UNIT WITHOUT THRU-BASE CONNECTION KIT
• HEAT ANTICIPATOR SETTINGS
Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
• SINGLE POINT BOXES AND SUPPLEMENTARY
FUSES
• SINGLE POINT BOXES WITHOUT FUSES
• LOW-VOLTAGE CONTROL CONNECTIONS
Humidi-MiZer® System Control Connections . . . . . 24
• HUMIDI-MIZER SYSTEM – SPACE RH CONTROLLER
RTU Open Controller (Factory-Installed Option). . . 25
SystemVu™ Controller (Factory-Installed Option) . 25
Integrated Staging Control (ISC) Board . . . . . . . . . . 26
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500219-01
Installation Instructions
Printed in U.S.A.
Form 50LC-7-05SI
Single Package Rooftop Cooling Only
with Puron
®
• ISC BOARD - SEQUENCE OF OPERATION
EconoMi$er® X (Factory Option) . . . . . . . . . . . . . . .28
• 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Multi-Speed VFD Display Kit (Field-Installed
Accessory) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
• 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
• COMPLETING INSTALLATION OF RETURN AIR
SMOKE SENSOR
• ADDITIONAL APPLICATION DATA
Step 11 — Adjust Factory-Installed Options . . . . . .51
• SMOKE DETECTORS
Step 12 — Install Accessories . . . . . . . . . . . . . . . . . .51
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . .51
Step 13 — Check Belt Tension . . . . . . . . . . . . . . . . .51
• 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, ANSI/NFPA70, National Electrical Code (NEC); in
Canada, CSA C22.1) for special requirements.
It is important to recognize safety information. This is the
safety-alert symbol
. When you see this symbol on the unit
Pg 1
WeatherExpert
50LC 07
(R-410A) Refrigerant
adjustment,
alteration,
2-19
Replaces: 50LC-7-04SI
®
service,

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Summary of Contents for Carrier WeatherExpert 50LC 07 Series

  • Page 1 ® WeatherExpert 50LC 07 Single Package Rooftop Cooling Only with Puron ® (R-410A) Refrigerant Installation Instructions NOTE: Read the entire instruction manual before starting the • ISC BOARD - SEQUENCE OF OPERATION installation. EconoMi$er® X (Factory Option) ....28 •...

  • Page 2: Electrical Shock Hazard

    and in instructions or manuals, be alert to the potential for personal injury. WARNING Understand the signal words DANGER, WARNING, PERSONAL INJURY AND ENVIRONMENTAL HAZARD CAUTION, and NOTE. These words are used with the safety- alert symbol. DANGER identifies the most serious hazards Failure to follow this warning could cause personal injury which will result in severe personal injury or death.
  • Page 3 Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit Heat Type Packaging 50 - Electric Cooling/Heating 0 = Standard Packaged Rooftop 1 = LTL Electrical Options Model Series - WeatherExpert ® A = None LC - Ultra High Efficiency B = HACR Circuit Breaker C = Non-Fused Disconnect Heat Options...
  • Page 4 Fig. 2 — Unit Dimensional Drawing...
  • Page 5 Fig. 2 — Unit Dimensional Drawing (cont)

  • Page 6: 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 7: Curb-Mounted Installation

    Step 4 — Provide Unit Support Table 2 — Operating Weights ROOF CURB MOUNT 50LC**07 UNITS LB (KG) Accessory roof curb details and dimensions are shown in Base Unit 967 (439) Fig. 5. Assemble and install accessory roof curb in accordance Economizer with instructions shipped with the curb.
  • Page 8 Fig. 5 — Roof Curb Details...
  • Page 9 Step 5 — Field Fabricate Ductwork Step 6 — Rig and Place Unit Cabinet return-air static pressure (a negative condition) shall Keep unit upright and do not drop. Spreader bars are required. not exceed 0.35 in. wg (87 Pa) with economizer or 0.45 in. wg Rollers may be used to move unit across a roof.
  • 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: Economizer Hood Package Removal And Setup - Factory Option

    NOTCHES NOTCHES FILTER ACCESS PANEL BASEPAN Fig. 8 — Location of Notches SCREWS INDOOR COIL ACCESS PANEL Fig. 10 — Typical Access Panel Locations DUCT COVERS Hood Parts SHEET METAL FACE UP Plastic Tie Wrap Qty (2) BASEPAN Screws for Metal Tray Qty (2) Fig.

  • Page 12: Electric Shock Hazard

    Caulk the ends of the joint between the unit top panel and determine which drain connection to use. Either drain connec- tion can be used with vertical or horizontal applications. the hood top. Replace the filter access panel. To use the alternate bottom drain connection, remove the red drain plug from the bottom connection (use a -in.

  • Page 13: Field Power Supply

    FIELD POWER SUPPLY Units Without Single Point Box, Disconnect or HACR Option If equipped with optional powered convenience outlet The power source leads to the convenience outlet’s transformer Equip primary are not factory connected. Installer must connect these GR Lug leads according to required operation of the convenience out- let.
  • Page 14 Fig. 19 — 50LC 07 Electro-mechanical Control Wiring Diagram...
  • Page 15 Fig. 20 — 50LC 07 RTU Open Control Wiring Diagram...
  • Page 16 Fig. 21 — 50LC 07 SystemVu™ Control Wiring Diagram...
  • Page 17 Fig. 22 — 50LC 07 Power Wiring Diagram, Electro-mechanical and RTU Open Controls (208/230-v, 460-v, and 575-v Units)
  • Page 18 Fig. 23 — 50LC 07 Power Wiring Diagrams, SystemVu™ Controls (208/230-v, 460-v, and 575-v Units)

  • Page 19: Units With Factory-Installed Non-Fused Dis- Connect Or Hacr

    UNITS WITH FACTORY-INSTALLED NON-FUSED DIS- CONNECT OR HACR The factory-installed optional non-fused disconnect (NFD) or HACR switch is located in a weatherproof enclosure located under the main control box. The manual switch handle and shaft is shipped in the disconnect or HACR enclosure. Assem- ble the shaft and handle to the switch at this point.

  • Page 20: Units Without Factory-Installed Non-Fused Disconnect Or Hacr

    UL standards. This components. Such operation would invalidate any applicable cover cannot be factory-mounted due to its depth; it must be in- Carrier warranty. stalled at unit installation. For shipment, the convenience outlet Example: Supply voltage is 230-3-60 is covered with a blank cover plate.
  • Page 21 DISCONNECT ALL POWER TO UNIT AND CONVE- NIENCE OUTLET. LOCK-OUT AND TAG-OUT ALL POWER. Remove the blank cover plate at the convenience outlet; dis- card the blank cover. Loosen the two screws at the GFCI duplex outlet, until approx- imately -in.

  • Page 22: Factory-Option Thru-Base Connections

    See unit nameplates for the proper fuse, THERMOSTAT HACR or maximum over-current protection device required on Install a Carrier-approved accessory thermostat according to the unit with field-installed accessories. installation instructions included with the accessory. For com- plete economizer function and 3 stage compressor operation select a three-stage cooling thermostat.

  • Page 23: Heat Anticipator Settings

    NOTE: If thru-the-bottom connections accessory is used, refer to DISCONNECT MOUNTIN the accessory installation instructions for information on routing LOCATIO power and control wiring. RACEWAY INDOOR UNI BLOCK-OFF OUTDOOR ACCESS ANEL ACCESS PANEL PANEL Fig. 36 — Access Panel Locations DISCONNECT EMT OR RIGID CONDUIT SINGLE...

  • Page 24: Low-Voltage Control Connections

    LOW-VOLTAGE CONTROL CONNECTIONS NOTE: 50LC**07 units require a 3-stage cooling thermostat de- Pull the low-voltage control leads from the heater module(s) - vice and are not compatible with Carrier’s Edge ® Pro thermidistat. VIO and BRN (two of each if two modules are installed; iden- tify for Module #1) - to the 4-pole terminal board TB4 located on the heater bulkhead to the left of Heater #1.
  • Page 25 RTU Open Controller (Factory-Installed Option) For details on operating 50LC**07 units equipped with the factory-installed RTU Open controller option, refer to 48/50LC 07-26 Factory Installed Option RTU Open Multi-Protocol Controller Controls, Start-up, Operation and Troubleshooting manual. SystemVu™ Controller (Factory-Installed Option) For details on operating 50LC**07 units equipped with the factory-installed SystemVu control option, refer to 48/50LC 04-26 Single Package Rooftop Units with SystemVu Controls...
  • Page 26 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 27: Isc Board - Sequence Of Operation

    General mode and the system provides mainly latent cooling. Indoor air- The Carrier Integrated Staging Control (ISC) is intended for flow will rise until reaching 100% of Speed, Outdoor airflow will use with a standard thermostat or direct digital controls (DDC) run at High speed as long as outdoor temperature is above 80°F...

  • Page 28: System Components

    OF SPEED SELECT Fig. 44 — Outdoor Fan Speed Select Switch JUMPER ON Fig. 46 — W7220 Economizer Module The W7220 economizer module can be used as a stand-alone economizer module wired directly to a commercial set-back space thermostat and sensors to provide outside air dry-bulb economizer control.

  • Page 29: Economizer Module Wiring Details

    • Nominal Power Consumption (at 24 vac, 60 Hz) — ECONOMIZER MODULE WIRING DETAILS 11.5 VA without sensors or actuators Use Fig. 47 and Tables 6 and 7 to locate the wiring terminals • Relay Digital Output Rating at 30 vac (maximum power for the Economizer module.

  • Page 30: Interface Overview

    Table 7 — Economizer Module Table 8 — HH57AC081 Sensor Wiring Terminations (Right Hand Terminal Blocks) TERMINAL TYPE DESCRIPTION LABEL TYPE DESCRIPTION NUMBER LABEL Top Right Terminal Blocks S-BUS Communications AUX2 I 24 vac IN The first terminal is not used. S-BUS S-BUS (Enthalpy Control...

  • Page 31: Setup And Configuration

    To use the keypad when working with menus: Press the (Enter) button to accept the displayed value and store it in nonvolatile RAM. “CHANGE STORED” • Press the ▲ (Up arrow) button to move to the previous displays. menu. Press the (Enter) button to return to the current menu •...
  • Page 32 Table 10 — 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 33 Table 10 — 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 34 Table 10 — 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 35 Table 10 — 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 36 Table 10 — 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 37 Table 12 — 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 38 Table 15 — 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 39 Table 17 — 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 40: Enthalpy Settings

    Table 19 — 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 41: Two-Speed Fan Operation

    ECONOMIZING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE Fig. 51 — Single Enthalpy Curve Boundaries Table 20 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY...

  • Page 42: Troubleshooting

    To perform a Checkout test: Variable Filter - used on Scroll to the desired test in the Checkout menu using the 575V units only! Frequency ▲ and ▼ buttons. Drive (VFD) Press the (Enter) button to select the item. RUN? appears.

  • Page 43: 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. NAVIGATION Green LED/On: Control selection is working. KEYS Yellow LED/Warn.: Indicates a warning. Flashing Red LED/Alarm: Indicates an alarm.

  • Page 44: Program The Vfd For 3 Discrete Indoor Fan Speeds

    Male Connector - connect to VFD Front Panel Fig. 58 — Align Bottom of VFD Keypad with Opening in VFD Front Panel Female Connector - connect to back of VFD Remote Keypad Fig. 60 — VFD Remote Keypad Cable PROGRAM THE VFD FOR 3 DISCRETE INDOOR FAN SPEEDS IMPORTANT: 50LC 07 units are programmed at the fac- tory for 3 discrete indoor fan speeds.
  • Page 45 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. Press the ▼ (Down Arrow) key until the following Status Quick Main...
  • Page 46 d. Press ▼ (Down Arrow) twice to reach the following d. Press ▼ (Down Arrow) until the following display display: appears: 1—1* Motor Selection 1—6* Load Depen. Setting 1—2* Motor Data 1—7* Start Adjustments e. Press OK; the following display appears: e.
  • Page 47 Setting References: b. Press ▼ (Down Arrow) twice, the following display a. Press the Menu key to move the ▼ (triangle icon) so appears: it is positioned over Main Menu. The display shows the following: 3—1* References 3—4* Ramp 1 0—** Operation / Display c.
  • Page 48 h. Press ▼ (Down Arrow) once, the following display d. Press ▼ (Down Arrow) once to move the highlight to appears: the bottom row and then press OK. The following dis- play appears: 4-19 Max Output Frequency 65.0Hz 6-10 Terminal 53 Low Voltage NOTE: Press OK to highlight the Hz value and then use the ▲...
  • Page 49 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 50: Completing Installation Of Return Air

    Table 22 — VFD Unit Parameters - 50LC 07 Units (cont) TERMINAL 53 TERMINAL 53 TERMINAL 53 TERMINAL 53 AUTO. RESET HIGH HIGH RESTART MODE FILTER VOLTAGE VOLTAGE REFERENCE REFERENCE TIME (S) Motor Voltage 6-10 6-11 6-14 6-15 14-20 14-21 14-50 Option 208/230V...

  • Page 51: Smoke Detectors

    Step 1 Step 2 Step 3 Fig. 63 — Completing Installation of Return Air Smoke Sensor Press the tension checker downward on the belt until the Step 11 — Adjust Factory-Installed Options large O-ring is at the bottom of the straightedge. SMOKE DETECTORS Adjust the belt tension as needed.
  • Page 52 BLOWER PULLEY V-BELT MOTOR PULLEY MOTOR MOUNTING MOTOR MOUNTING BOLTS (4) PLATE Fig. 65 — Belt Drive Motor Mounting...
  • Page 54 © Carrier Corporation 2019 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500219-01 Printed in Printed in U.S.A. Form 50LC-7-05SI Pg 54 2-19 Replaces: 50LC-7-04SI...

  • Page 55: Preliminary Information

    START-UP CHECKLIST FOR 50LC SINGLE PACKAGE ROOFTOP COOLING ONLY (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 56: Humidi-Mizer

    10. Restore set-points for thermostat and humidistat (Y/N) _____ REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS. © Carrier Corporation 2019 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500219-01 Printed in U.S.A.

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