Carrier WeatherExpert 50LC14 Installation Instructions Manual Download Page 1 | Manualshive

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Carrier WeatherExpert 50LC14 Installation Instructions Manual Download Page 1

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 1

1-2021

Replaces: 50LC-14-26-05SI

Installation Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
MODEL NUMBER NOMENCLATURE AND

DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Rated Indoor Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Plan for Unit Location . . . . . . . . . . . . . . . 19

Plan for Sequence of Unit Installation . . 19

• CURB-MOUNTED INSTALLATION

• PAD-MOUNTED INSTALLATION

• FRAME-MOUNTED INSTALLATION

Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . 19

Provide Unit Support . . . . . . . . . . . . . . . . 19

• ROOF CURB MOUNT

• SLAB MOUNT (HORIZONTAL UNITS ONLY)

• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR

Field Fabricate Ductwork . . . . . . . . . . . . . 24

• UNITS WITH ACCESSORY OR OPTIONAL ELECTRIC

Rig and Place Unit . . . . . . . . . . . . . . . . . . 24

• POSITIONING ON CURB

Horizontal Duct Connection . . . . . . . . . . 25

Install Outside Air Hood (Factory Option) .

Assemble Barometric Hood . . . . . . . . . . . 26

• BAROMETRIC HOOD (VERTICAL CONFIGURATION)

• BAROMETRIC HOOD (HORIZONTAL

Step 10 — Economizer – Horizontal Airflow Units

Step 11 —

Install External Condensate Trap/Line . . . 28

Step 12 —

Make Electrical Connections . . . . . . . . . 28

• FIELD POWER SUPPLY

• UNITS WITHOUT FACTORY-INSTALLED NON-

FUSED DISCONNECT OR HACR

• UNITS WITH FACTORY-INSTALLED NON-FUSED

DISCONNECT OR HACR

• CONVENIENCE OUTLETS

• HACR AMP RATING

• FACTORY-OPTION THRU-BASE ELECTRICAL

• UNITS WITHOUT THRU-BASE ELECTRICAL

• FIELD CONTROL WIRING

• UNITS WITHOUT THRU-BASE CONNECTION KIT

• CONFIGURING FOR ELECTRIC HEAT

• HEAT ANTICIPATOR SETTINGS

• TRANSFORMER CONNECTION FOR 208-V POWER

• ELECTRIC HEATERS

• HUMIDI-MIZER® SYSTEM CONTROL

RTU Open Controller (Factory-Installed Option) . .43
SystemVu Controller (Factory-Installed Option) . . .43
Integrated Staging Control (ISC) . . . . . . . . . . . . . . .44

• SEQUENCE OF OPERATION

Economi$er® X (Factory-Installed Option)

. . . . . . .46

• UNIT INSTALLATION

• ENTHALPY SENSOR RELOCATION

• W7220 ECONOMIZER CONTROLLER

• W7220 ECONOMIZER MODULE WIRING

• ECONOMIZER CONTROL CONFIGURATIONS

• ECONOMISER HARDWARE

• OPERATING SEQUENCES

• W7220 ECONOMIZER SETUP AND CONFIGURATION

• TROUBLESHOOTING

• CONTROL SETPOINT AND CONFIGURATION LOG

Staged Air Volume (SAV™) with Variable Frequency

Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

• MULTI-SPEED VFD DISPLAY KIT (FIELD-

INSTALLED ACCESSORY)

Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

• RETURN AIR SENSOR TUBE INSTALLATION

• SMOKE DETECTOR TEST MAGNET

• ADDITIONAL APPLICATION DATA

Step 13 —

Install Accessories . . . . . . . . . . . . . . . . .78

Step 14 —

Check Belt Tension . . . . . . . . . . . . . . . . .78

• BELT FORCE: DEFLECTION METHOD

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.

WeatherExpert

®

50LC14-26 Single Package Rooftop

Cooling Only

with Puron

®

(R-410A) Refrigerant

1
2
3
...
»

Summary of Contents for WeatherExpert 50LC14

Page 1: ...en Controller Factory Installed Option 43 SystemVu Controller Factory Installed Option 43 Integrated Staging Control ISC 44 SEQUENCE OF OPERATION Economi er X Factory Installed Option 46 UNIT INSTALLA...

Page 2: ...this equipment during installation There may be more than one disconnect switch Tag all disconnect locations to alert others not to restore power until work is completed WARNING UNIT OPERATION AND SAF...

Page 3: ...Al Cu Al Cu C E coat Al Cu Al Cu D E coat Al Cu E coat Al Cu E Cu Cu Al Cu F Cu Cu Cu Cu M Al Cu Al Cu Louvered Hail Guard N Precoat Al Cu Al Cu Louvered Hail Guard P E coat Al Cu Al Cu Louvered Hail...

Page 4: ...4 Fig 2 50LC Vertical Airflow Size 14...

Page 5: ...5 Fig 3 50LC Horizontal Airflow Size 14...

Page 6: ...6 Fig 4 50LC Back View and Condensate Drain Location Size 14...

Page 7: ...7 Fig 5 50LC Corner Weights and Clearances Size 14...

Page 8: ...8 Fig 6 50LC Bottom View Size 14...

Page 9: ...9 Fig 7 50LC Vertical Airflow Sizes 17 20...

Page 10: ...10 Fig 8 50LC Horizontal Airflow Sizes 17 20...

Page 11: ...11 Fig 9 50LC Back View and Condensate Drain Location Sizes 17 20...

Page 12: ...12 Fig 10 50LC Corner Weights and Clearances Sizes 17 20...

Page 13: ...13 Fig 11 50LC Bottom View Sizes 17 20...

Page 14: ...14 Fig 12 50LC Vertical Airflow Sizes 24 26...

Page 15: ...15 Fig 13 50LC Horizontal Airflow Sizes 24 26...

Page 16: ...16 Fig 14 50LC Back View and Condensate Drain Location Sizes 24 26...

Page 17: ...17 Fig 15 50LC Corner Weights and Clearances Sizes 24 26...

Page 18: ...18 Fig 16 50LC Bottom View Sizes 24 26...

Page 19: ...nsate line trap and piping 9 Make electrical connections 10 Install other accessories PAD MOUNTED INSTALLATION 1 Prepare pad and unit supports 2 Rig and place unit 3 Remove duct covers and top skid 4...

Page 20: ...level concrete slab that extends a minimum of 6 in 150 mm beyond unit cabinet Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstruct ing airflow NOTE H...

Page 21: ...21 Fig 19 Roof Curb Details 14 Size Unit...

Page 22: ...22 Fig 20 Roof Curb Details 17 and 20 Size Units...

Page 23: ...23 Fig 21 Roof Curb Details 24 and 26 Size Units...

Page 24: ...jury For vertical supply and return units tools or parts could drop into ductwork and cause an injury Install a 90 degree turn in the return ductwork between the unit and the conditioned space If a 90...

Page 25: ...cks are shipped in a carton that is secured to the rear of the blower assembly Access the carton location through rear panel see Fig 25 Fig 24 Hood Top Shipping Position Fig 25 Hood Package Shipping L...

Page 26: ...Fig 29 Barometric Hood Parts BAROMETRIC HOOD VERTICAL CONFIGURATION 1 Remove the hood top panel from its shipping position on the unit end see Fig 30 Fig 30 Shipping Location Vertical Units 2 Remove...

Page 27: ...opening in the bottom panel or airflow into the outside air hood will be restricted See Fig 34 Fig 34 Relief Damper 2 Cut a 16 in x 36 in opening in the return duct for the relief damper see Fig 34 3...

Page 28: ...an result in damage to the drain pan See Fig 39 Fig 39 Condensate Drain Pan Piping Details All units must have an external trap for condensate drainage In stall a trap at least 4 in 102 mm deep and pr...

Page 29: ...R connect the source leads to the terminal block with unit field power leads See Fig 40 Fig 40 Location of TB1 Field power wires are connected to the unit at line side pressure lugs on the terminal bl...

Page 30: ...30 Fig 42 50LC 14 26 Electro Mechanical Control Wiring Diagram...

Page 31: ...31 Fig 43 50LC 14 26 RTU Open Control Wiring Diagram...

Page 32: ...32 Fig 44 50LC 14 26 SystemVu Control Wiring Diagram...

Page 33: ...33 Fig 45 Typical Power Wiring Diagram Electro Mechanical and RTU Open Controls 50LC 14 24 Units 208 230V Shown...

Page 34: ...34 Fig 46 Typical Power Wiring Diagram Electro Mechanical and RTU Open Controls 50LC 15 24 Units 460V 575V Shown...

Page 35: ...35 Fig 47 Typical Power Wiring Diagram SystemVu Controls 50LC Unit 208 230V Shown...

Page 36: ...36 Fig 48 Typical Power Wiring Diagram SystemVu Controls 50LC Unit 460V 575V Shown...

Page 37: ...7 Install the handle on to the corner post vertically with the red arrow pointing up 8 Secure the handle to the corner post with 2 screws and lock washers supplied Fig 49 Handle and Shaft Assembly fo...

Page 38: ...B 224 v BC 231 v AC 226 v Average Voltage 224 231 226 681 227 3 3 Voltage Imbalance 100x 4 1 78 227 IMPORTANT If the supply voltage phase imbalance is more than 2 contact your local electric utility c...

Page 39: ...This type requires the field installation of a general purpose 125 v 15A circuit powered from a source elsewhere in the building Ob serve national and local codes when selecting wire size fuse or brea...

Page 40: ...unit See unit nameplate and label on factory installed HACR for the amp rating of the HACR that was shipped with the unit from the factory Fig 56 See unit nameplates for the proper fuse HACR or maxi...

Page 41: ...e routed through the rubber grommet located on the corner post adjacent to the control box ac cess panel Route wire through the grommet and then route the wire behind the corner post utilizing the fac...

Page 42: ...IZER SYSTEM CONTROL CONNECTIONS NOTE It is suggested to ensure the Auto Changeover function of an installed thermostat is enabled when used in conjunction with the Humidi MiZer Adaptive Dehumidificati...

Page 43: ...hown in Fig 64 RTU Open Controller Factory Installed Option For details on operating 50LC 014 26 units equipped with the factory installed RTU Open option refer to 48 50LC07 26 Factory Installed Optio...

Page 44: ...3 and wiring to the Smoke Shutdown terminal The Smoke Alarm terminal on the ISC Board provides a pass thru connection should a smoke alarm signal be connected In the case of the RTU Open option the R...

Page 45: ...will run and the outdoor fan will run at low speed If there is further de mand for cooling the outdoor air damper will maintain its current position compressor C2 will run and the outdoor fan will run...

Page 46: ...thalpy sensor when provided see below then assembling and mounting the unit s outside air hood Refer to the base unit s in stallation instruction manual for directions on locating the hood parts packa...

Page 47: ...and holding the or button causes the display to automatically increment or decrement 1 Press the Enter button to accept the displayed value and store it in nonvolatile RAM CHANGE STORED displays 2 Pre...

Page 48: ...xed air from SAT sensor in fan section Displays _ _ _ if not connected short or out of range See Note 2 DA TEMP nn F or C 0 to 140 F 18 to 60 C DISCHARGE AIR TEMPERATURE after Heating section Accessor...

Page 49: ...RVE ES3 ES1 ES2 ES3 ES4 or ES5 ENTHALPY CHANGEOVER CURVE Requires enthalpy sensor option Enthalpy boundary curves for economizing using single enthalpy DCV SET 1100ppm 500 to 2000ppm increment by 100...

Page 50: ...temperature falls below setup value FREEZE POS CLO CLO or MIN FREEZE PROTECTION DAMPER POSITION Damper position when freeze protection is active CLO closed MIN MIN POS or VENT MAX CO2 ZERO 0ppm 0 to 5...

Page 51: ...pen position DAMPER CLOSE N A N A Positions damper to the fully closed position CONNECT Y1 O N A N A Closes the Y1 O relay Y1 O CONNECT Y2 O N A N A Closes the Y2 O relay Y2 O CONNECT AUX1O N A N A En...

Page 52: ...ITY SENSOR COMMON IAQ 24V 24 VAC AIR QUALITY SENSOR 24 VAC SOURCE ACT 2 10 2 10 VDC DAMPER ACTUATOR OUTPUT 2 10 VDC ACT COM COM DAMPER ACTUATOR OUTPUT COMMON ACT 24V 24 VAC DAMPER ACTUATOR 24 VAC SOUR...

Page 53: ...D 6 5 4 3 2 1 AUX2 I OCC EXH 1 AUX1 O E GND Y2 I Y1 I Y1 O C R Y2 O W7220 CONTROLLER W1 BLUE GRAY OAT 1 20 K OHM PNO HH79NZ007 SAT 20 K OHM PNO HH79NZ007 CO2 SENSOR 1 If no Enthalpy sensor connected 2...

Page 54: ...thalpy sensor When the OA temperature OA humidity and OA dew point are all below the selected boundary the economizer sets the econo mizing mode to YES economizing is available When all of the OA cond...

Page 55: ...and VENTMAX L These settings are higher than the comparable High speed settings and cause the out side air damper to open more to allow the same Va and Vbz air flow rates to be admitted to the space A...

Page 56: ...TILATION FOR PEOPLE VENTILATION FOR SOURCES INCREASING VENTILATION VENTMAX H VENTMIN H 100 700 INSIDE OUTSIDE CO2 DIFFERENTIAL VENTILATION FOR PEOPLE VENTILATION FOR SOURCES INCREASING VENTILATION VEN...

Page 57: ...esistance vs tempera ture characteristics The OAT sensor is attached to the outside air damper frame It is connected to the W7220 s OAT input terminals If an accessory enthalpy sensor is added to an E...

Page 58: ...r X with W7220 controller and thermostat or unitary controller that energizes the G terminal in cooling and heating to control the supply fan operation Table 16 W7220 Input Output without CO2 Sensor F...

Page 59: ...po sition will shift to MIN POS H third stage cooling starts As space temperature falls the thermostat will remove its call for third stage cooling ISC terminal Y3 call is removed The supply fan will...

Page 60: ...DCV maximum ventilation point is VENTMAX H DCV operation will float between its VENTMIN and VENT MAX settings never exceeding the VENTMAX limit as the space CO2 level varies according to changes in pe...

Page 61: ...Delay Upon power up or after a power outage or brownout the W7220 controller module begins a 5 minute power up delay before en abling mechanical cooling Power Loss Outage or Brownout All setpoints and...

Page 62: ...the control is to default to the temperature sensor in the enthalpy sensor In checkout the outdoor damper closes when I command it to open Check the actuator linkage or rotation In the CHECKOUT mode t...

Page 63: ...m is in heating mode SD Enables configuration of shutdown not available on 2 speed See Table 7 on page 48 Menu Note 4 FAN TYPE 2speed 2 speed required Sets the economizer controller for operation of 1...

Page 64: ...tilation MAT T CAL 0 0 1 0 F or C 2 5 F 1 4 C SUPPLY AIR TEMPERATURE CALIBRATION Allows the operator to adjust for an out of calibration supply air temperature SAT sensor OA T CAL 2 0 3 0 F or C 2 5 F...

Page 65: ...m level below the setpoint MIN POS L 6 0 V 2 to 10 Vdc VENTILATION MINIMUM POSITION AT LOW SPEED Displays ONLY if a CO2 sensor is NOT connected MIN POS H 4 4 V 2 to 10 Vdc VENTILATION MINIMUM POSITION...

Page 66: ...cy Drive See Fig 79 for the VFD location Fig 78 Variable Frequency Drive VFD Fig 79 VFD Location MULTI SPEED VFD DISPLAY KIT FIELD INSTALLED ACCESSORY NOTE The Remote VFD Keypad is part of the Multi S...

Page 67: ...selected menu Status Quick Menu or Main Menu 1 Com LED Flashes when bus communications is communicating 2 Green LED On Control selection is working 3 Yellow LED Warn Indicates a warning 4 Flashing Red...

Page 68: ...ndoor Fan Speeds NOTE This procedure requires use of the VFD Keypad which is included as part of the field installed Multi Speed VFD display kit P N CRDISKIT002A00 If the VFD keypad is not already in...

Page 69: ...id Type a Press the Menu key to move the triangle icon so it is positioned over the Main Menu The display shows the following b Press OK twice The display changes to c Press Down arrow key three times...

Page 70: ...ided in Tables 19 23 beginning on page 73 Press OK again to set the selected value g Press Down arrow twice The following display appears h Press OK to highlight the number in brackets then use the Up...

Page 71: ...owing display appears e Press Down arrow key once The following dis play appears f Press Down arrow key again The following dis play appears NOTE Press OK to highlight the HZ value and then use the Up...

Page 72: ...rs f Press OK to highlight the number in the bracket g Use the Up arrow and Down arrow keys to change the number to 3 for 2 automatic resets then press OK The display changes to h Press Down arrow key...

Page 73: ...WA381 131L9868 122 15 460 13 7 1760 575V HD62FL576 HK30WA384 131N0229 132 15 575 8 9 1760 MOTOR OPTION VOLTAGE START DELAY sec FLYING START MIN SPEED FOR FUNCTION Hz MOTOR THERMAL PROTECTION PRESET RE...

Page 74: ...54 HK30WA386 131L9869 1 122 16 460 16 9 1755 575V HD64FL576 HK30WA388 131N0233 1 132 16 575 12 6 1755 MOTOR OPTION VOLTAGE START DELAY sec FLYING START MIN SPEED FOR FUNCTION Hz MOTOR THERMAL PROTECTI...

Page 75: ...0WA386 131L9869 122 16 460 16 9 1755 575V HD64FL576 HK30WA388 131N0233 132 16 575 12 6 1755 MOTOR OPTION VOLTAGE START DELAY sec FLYING START MIN SPEED FOR FUNCTION Hz MOTOR THERMAL PROTECTION PRESET...

Page 76: ...0WA386 131L9869 122 16 460 16 9 1755 575V HD64FL576 HK30WA388 131N0233 132 16 575 12 6 1755 MOTOR OPTION VOLTAGE START DELAY sec FLYING START MIN SPEED FOR FUNCTION Hz MOTOR THERMAL PROTECTION PRESET...

Page 77: ...76 HK30WA388 131N0233 132 16 575 12 6 1755 MOTOR OPTION VOLTAGE START DELAY sec FLYING START MIN SPEED FOR FUNCTION Hz MOTOR THERMAL PROTECTION PRESET REFERENCE 1 71 1 73 1 82 1 90 3 10 0 3 10 1 3 10...

Page 78: ...MAGNET Locate the magnet it is shipped in the control box area ADDITIONAL APPLICATION DATA Refer to Factory Installed Smoke Detectors for Small and Me dium Rooftop Units 2 to 25 Tons for discussions o...

Page 79: ...SET SCREW SET SCREW STRAIGHT EDGE BELT SPAN DEFLECTION BELT SPAN 64 Table 1 Table 2 BELT CROSS SECTION SMALLEST SHEAVE DIAMETER BELT DEFLECTION FORCE LBS UNNOTCHED BELTS NOTCHED BELTS USED NEW USED N...

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Page 81: ......

Page 82: ...ht 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...

Page 83: ...erminals are tight Y N _____ Check that indoor air filters are clean and in place Y N _____ Check that outdoor air inlet screens are in place Y N _____ Verify that unit is level Y N _____ Check fan wh...

Page 84: ...ing air temperature _______________ F D Liquid line temperature at outlet or reheat coil _______________ F E Confirm correct rotation for compressor Y N _____ F Check for correct ramp up of outdoor fa...

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