Page 1: Table Of Contents
50LC WeatherExpert Series Single Package Rooftop Cooling Only with Puronr (R ---410A) Refrigerant Size: 07 Installation Instructions NOTE: Read the entire instruction manual before starting Convenience Outlets ..... . . the installation.
Page 2: Safety Considerations
Demand Controlled Ventilation ....Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloths for brazing operations and Economizer Occupancy Control ....have a fire extinguisher available.
Page 3: Rated Indoor Airflow (Cfm)
Rated Indoor Airflow (cfm) CAUTION This table lists the rated indoor airflow used for the AHRI efficiency rating for the units covered in this document. CUT HAZARD Model Number Full Load Airflow (cfm) Failure to follow this caution may result in personal injury.
Page 4 a50--- 9584 Fig. 2 - - Unit Dimensional Drawing...
Page 5 a50--- 9585 Fig. 2 - - Unit Dimensional Drawing (cont)
Page 6: Installation
C13093 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 (914 mm) Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass)
Page 7: Step 2 - Plan For Sequence Of Unit Installation
Table 1 – Operating Weights On units with hinged panel option, check to be sure all latches are snug and in closed position. 50LC**07 UNITS LB (KG) Locate the carton containing the outside air hood parts; Base Unit 967 (439) see Fig.
Page 8 C13311 Fig. 5 - - Roof Curb Details...
Page 9: Step 5 - Field Fabricate Ductwork
Step 5 — Field Fabricate Ductwork Step 6 — Rig and Place Unit Cabinet return-air static pressure (a negative condition) Keep unit upright and do not drop. Spreader bars are shall not exceed 0.35 in. wg (87 Pa) with economizer or required.
Page 10: Step 7 - Convert To Horizontal And Connect
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 8 - Install Outside Air Hood
Step 8 — Install Outside Air Hood 4. Carefully lift the hood assembly (with metal tray) through the filter access opening and assemble per the Economizer Hood Package Removal and Setup - - steps outlined in Economizer Hood, below. Factory Option Economizer Hood —...
Page 12: Step 9 - Install External Condensate Trap And Line
4. Insert the hood divider between the hood sides. See The piping for the condensate drain and external trap can Fig. 11 and Fig. 12. Secure hood divider with 2 be completed after the unit is in place. See Fig. 14. screws on each hood side.
Page 13 unit disconnect. On a unit without a unit- - mounted Units Without Single Point Box, Disconnect or HACR Option disconnect, connect the source leads to compressor contactor C and indoor fan terminal block (IFTB) pressure Equip GR Lug lugs with unit field power leads. Refer to Fig.
Page 14 a50--- 9586 Fig. 17 - - 50LC 07 Electro- - mechanical Control Wiring Diagram...
Page 15 a50--- 9592 Fig. 18 - - 50LC 07 RTU Open Control Wiring Diagram...
Page 16 a50--- 9587 Fig. 19 - - 50LC 07 SystemVut Control Wiring Diagram...
Page 17 a50--- 9588 Fig. 20 - - 50LC 07 Power Wiring Diagram, Electro- - mechanical and RTU Open Controls, 208/230V, 460V and 575V Units...
Page 18 a50--- 9589 Fig. 21 - - 50LC 07 Power Wiring Diagram, SystemVut Controls, 208/230V, 460V and 575V Units...
Page 19: Units With Factory- - Installed
Units With Factory- - Installed Non- - Fused Disconnect 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.
Page 20: Units Without Factory- - Installed
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. NOTE: Check all factory and field electrical connections for tightness. Convenience Outlets — WARNING...
Page 21 backing plate over the screw heads at the keyhole slots Fuse on power type: The factory fuse is a Bussman and align with the gasket; tighten the two screws until “Fusetron” T- - 15, non- - renewable screw- - in (Edison base) snug (do not over-tighten).
Page 22: Hacr
The 50LC unit requires an external temperature control device such as a thermostat (field- - supplied). Thermostat — Install a Carrier- - approved accessory thermostat according to installation instructions included with the accessory. For complete economizer function and 3 stage compressor operation select a three- - stage cooling thermostat.
Page 23: Unit Without Thru- - Base Connection Kit
Electric Heaters Typical Integrated Staging Control Thermostat (ISC) Board or Connections SystemVu Controller 50LC units equipped with factory field- - installed electric heaters. The heaters are modular in design, with heater frames holding open coil resistance wires strung through ceramic insulators, line- - break limit switches and a control contactor.
Page 24: Single Point Boxes And Supplementary Fuses
CONTROL BUSHING SINGLE POINT BOX MOUNTING SCREWS DRIP BOOT BRACKET MOUNTING SCREWS TRACK POWER WIRES FOAM BUSHING FLANGE HEATER RELAYS HEATER MOUNTING SCREWS C14253 Fig. 37 - - Typical Single Point Installation C08135 Fig. 36 - - Typical Module Installation Table 2 –...
Page 25: Humidi- -Mizer R System Control Connections
NOTE: Use of a humidistat device is not permitted on NOTE: 50LC**07 units require a 3- - stage cooling 50LC units equipped with RTU Open control; these units thermostat device and are not compatible with Carrier’s require field- - supplied...
Page 26: Integrated Staging Control (Isc) Board
In the case of the RTU Open option, The Carrier Integrated Staging Control (ISC) is intended the RTU Open controller provides the signal which is for use with a standard thermostat or direct digital controls passed thru the ISC board to the Smoke Alarm terminal.
Page 27: Cooling
Table 3 – Status Code Descriptions for ISC Board LEDs 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 28: Low Ambient Cooling Operation Down To 40_F (4_C)
above the CO set- - point, the minimum position of the Heating — damper will be increased proportionally. As the CO level In the Heating Mode (W1 on the thermostat), power is decreases because of the increase of fresh air, the applied to the G and W1 terminal at the ISC board and outdoor- - air damper will be proportionally closed.
Page 29: User Interface
The W7220 control also includes a new capability that The Menus in display order are: will adjust the damper control points during DCV or S STATUS minimum ventilation operation as the indoor fan speed is S SETPOINTS changed. This control function ensures that required space ventilation airflow quantities are maintained during S SYSTEM SETUP reduced fan speed operation.
Page 30 Table 5 – Menu Structure Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value STATUS ECON AVAIL YES/NO ECONOMIZING AVAILABLE YES = economizing available; the system can use outside air for free cooling when required ECONOMIZING YES/NO ECONOMIZING ACTIVE YES = Outside air being used for Cooling Stage 1.
Page 31 Table 5 - - Menu Structure* (cont) Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value STATUS EXH1 OUT ON/OFF EXHAUST STAGE 1 RELAY OUTPUT (cont) Output of EXH1 terminal: = relay closed OFF = relay open EXH2 OUT ON/OFF EXHAUST STAGE 2 RELAY OUTPUT...
Page 32 Table 5 - - Menu Structure* (cont) Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value SYSTEM INSTALL 01/01/10 Display order = MM/DD/YY SETUP Setting order = DD, MM, then YY . UNITS DEG _F or _C Sets economizer controller in degrees Fahrenheit or Celsius.
Page 33 Table 5 - - Menu Structure* (cont) Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value CHECKOUT DAMPER VMIN .HS Positions OA damper to VMIN High Speed position DAMPER VMAX .HS Positions OA damper to VMAX High Speed position DAMPER OPEN Positions OA damper to the full open position.
Page 34: Connections And Applications
Connections and Applications W7220 Economizer Module Wiring — Use Fig. 45 and Tables 6 and 7 to locate the wiring terminals for the Economizer module. W7220 Controller NOTE: The bottom 4 Pin actuator header is not used Left Terminal Right Terminal Block Label Block Label C14156...
Page 35: Economizer Control Configurations
20-K OHM PNO HH79NZ007 TSTAT W1 AUX2-I 20-K OHM OCCUPANCY --- TSTAT G PNO HH79NZ007 W7220 GROUND E- GND GRN/YEL S - BUS CONTROLLER EXH 1 POWER EXHAUST RELAY S - BUS AUX1-O IAQ - 2 - 10 SENSOR IAQ COM Y2 - I TSTAT Y3 IAQ 24V+...
Page 36 The W7220 calculates the enthalpy and dew point using Fig. 48 shows the 5 current boundaries. There is also a the OA temperature and humidity input from the OA high limit boundary for differential enthalpy. The high enthalpy sensor. When the OA temperature, OA humidity limit boundary is ES1 when there are no stages of and OA dew point are all below the selected boundary, the mechanical cooling energized and HL (high limit) when a...
Page 37: Demand Controlled Ventilation
Demand Controlled Ventilation — should be set to an economizer position that brings in enough fresh air to remove contaminants and CO Demand Controlled Ventilation (DCV) function requires a generated by sources other than people; this airflow rate is space air CO sensor be connected to the W7220 designated Va.
Page 38: Economizer Occupancy Control
To determine the damper setpoint position, perform the When determining VENTMIN setpoints, substitute the following procedure for each condition setpoint, with value for Va in place of Vbz in the formula. mechanical cooling OFF: DCV Setpoint: The SETPOINTS parameter DCV SET Calculate the appropriate supply air temperature using the defines the space CO level above which the DCV mode...
Page 39: Hardware
Hardware Table 10 – SAT/OAT Sensor Characteristics Deg C Ohms Deg F Ohms Actuators — --- 30 415156 --- 20 386130 The EconoMi$er X damper actuators are direct- - coupled --- 25 301540 193070 types with spring- - return. Power is 24- - v from the W7220 --- 20 221210 101820...
Page 40: Operating Sequences
Table 13 – Supply Fan Speed Logic without Economizer 51/64 (21) TSTAT OUTPUT G/OCC 0--- V 24---V 0--- V 0--- V 4-1/4 (108) 0--- V 24---V 0--- V 0--- V 0--- V 0--- V 24---V 0--- V 2-3/4 (70) 0--- V 0--- V 0--- V 24---V...
Page 41 The supply fan motor will continue to run in Low Speed. outdoor enthalpy, differential dry bulb or differential W7220 input OCC remains energized; the outside air enthalpy), a space thermostat call for Stage 1 Cooling damper remains in MIN POS L. If ISC terminal G is also energizes ISC terminals G and Y1;...
Page 42: Heating With Economi$Er
Table 15 – W7220 Input/Output with Demand Controlled Ventilation (DCV) INPUTS OUTPUTS Occupancy Ref: DEMAND OUTSIDE AIR Mechanical Cooling Stage FAN SPD* OCC Yes OCC No CONTROLLED Good to Y1--- I Y2--- I VENTILATION economize? Y1--- O/1ST Y2--- O/2ND Outside Air Damper Position 0--- v/Off 0--- v/Off VENTMIN L...
Page 43: Demand Controlled Ventilation
Demand Controlled Ventilation — Setup and configuration involves stepping through three menus and enabling required functions and re- - selecting If a space or return air CO sensor is connected to the setpoints to meet project requirements. The menus used EconoMi$er X control, a Demand Controlled Ventilation are SYSTEM SETUP, ADV SETUP and SETPOINTS.
Page 44: Status
To perform a Checkout test: Troubleshooting 1. Scroll to the desired test in the Checkout menu using Power Up Delay— the the buttons. 2. Press the button to select the item. Upon power up (or after a power outage or brownout) the 3.
Page 45 Table 16 – Operating Issues and Concerns Issue or Concern Possible Cause and Remedy My outdoor temperature reading Check the sensor wiring: on the STATUS menu is not • Enthalpy sensors are to be wired to the S--- Bus terminals. accurate.
Page 46: Control Set Point And Configuration Log
CONTROL SET POINT 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 Project Parameter Default Parameter Notes Value Range and Increment Value INSTALL 01/01/10 Display order = MM/DD/YY Setting order = DD, MM, then YY...
Page 47 Menu 2: Advanced Setup Parameter Project Parameter Default Parameter Notes Value Range and Increment Value MA LO SET 45_F (7_C) 35 to 55_F; SUPPLY AIR TEMPERATURE LOW LIMIT (2 to 13_C) Temperature to achieve Freeze Protection (close damper and alarm if incremented by 1_ temperature at SAT location falls below setup value) FREEZE POS...
Page 48: Staged Air Volume (Savt) With Variable Frequency Drive
Menu 3: Setpoints Parameter Project Parameter Default Parameter Notes Value Range and Increment Value MAT SET 53_F 38 to 65_F; SUPPLY AIR SETPOINT (12_C) (3 to 18_C) Setpoint determines where the economizer will modulate the OA increment by 1_ damper to maintain the supply air temperature. See Menu Note 2 (on page 33).
Page 49: Multi- -Speed Vfd Display Kit (Field- -Installed Accessory)
Multi- -Speed VFD Display Kit (Field- -Installed Accessory) NOTE: The Remote VFD Keypad is part of the Multi- - Speed VFD display kit (PN: CRDISKIT002A00) which is a field- - installed accessory. It is not included with the 50LC 07 base unit. The VFD keypad as shown in Fig.
Page 50: Connecting The Keypad To The Vfd
Navigation Keys and Status LEDs: The Navigation keys Connecting the Keypad Directly to the VFD — and Status LEDs are detailed in the following table. 1. Place the bottom of the VFD keypad into the variable frequency drive as shown in Fig. 57. Com.
Page 51: Program The Vfd For 3 Discrete Indoor Fan Speeds
change the language, press the OK key and use the Y Male Connector - and B keys to scroll to the desired language and then connect to VFD Front Panel press OK. Select language English [0] English SETUP 1 Status Quick Main Menu...
Page 52 3. Clearing Alarm 060: External Interlock: 5. Entering Motor Data: a. Press the Menu key twice to position the B(tri- a. Press the Menu key to move the B(triangle angle icon) over Main Menu; the display icon) so it is positioned over Main Menu. The changes to - - display show the following - - 0--- ** Operation / Display...
Page 53 m. Press B(Down Arrow) once to display the l. Press B(Down Arrow) once, the following following - - display appears - - 1-25 Motor Nominal Speed 1-82 Min Speed for Functio… 1740rpm 1.0 Hz n. Press OK to highlight the rpm value and then m.
Page 54 f. Press the Back key until the following display f. Press OK again to highlight the bottom row and use the Y and B (Up and Down Arrow) keys to appears - - select 10.00s. Press OK again to set the selected 3--- 0* Reference Limits Ramp Down Time.
Page 55 10. Setting Digital Inputs: d. Press B(Down Arrow) once to move the high- light to the bottom row and then press OK. The a. Press the Back key until the following display following display appears - - appears - - 6-10 Terminal 53 Low Voltage 3--- ** Reference / Ramps 4--- ** Limits / Warnings...
Page 56 h. Press B(Down Arrow) once, the following dis- play appears - - 14-21 Automatic Restart T… i. Press OK to highlight the number of seconds and use the Y and B (Up and Down Arrow) keys to select 600 seconds. Press OK again to set the selected value.
Page 60: Smoke Detectors
Legend and Notes for Tables 18 and 19 shutdown operation; additional wiring or modifications to the Integrated Staging Control (ISC) board may be necessary LEGEND: to complete the unit and smoke detector configuration to BRKR Circuit breaker C.O. Convenience outlet meet project requirements.
Page 61: Step 11 - Adjust Factory- -Installed Options
Step 11 — Adjust Factory- -Installed Options Step 13 — Check Belt Tension Smoke Detectors — Measure the belt span length as shown in Fig. 63. Calculate the required deflection by multiplying the belt Smoke detector(s) will be connected at the Integrated span length by 1/64.
Page 62 BLOWER PULLEY V-BELT MOTOR PULLEY MOTOR MOUNTING MOTOR MOUNTING BOLTS (4) PLATE C11504 Fig. 64 - - Belt Drive Motor Mounting — Pre- - Start and Start- - Up This completes the mechanical installation of the unit. Refer to the unit’s Service Manual for detailed Pre- - Start and Start- - Up instructions.
Page 63: Unit Start Up Checklist
UNIT START-UP CHECKLIST (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 judgement, follow safe practices, and adhere to the safety considerations/information as outlined in the preceding sections of this Installation Instructions document.
Page 64 III. HUMIDI- -MIZER SYSTEM START-UP NOTE: Units equipped with either SystemVut or RTU- - Open controls have Service Test menus or modes that can assist with the Humidi- - MiZer System Start- - Up function and provide the means to make the observations listed for this start- - up.

Carrier WeatherExpert 50LC Installation Instructions Manual

Theinstallation.

Safety Considerations

Installation

Integrated Staging Control (ISC) Board

Economi$Er R X (Factory- -Installed Option)

Unit Start up Checklist

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