Carrier WeatherExpert 48LC Installation Instructions Manual Download

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Installation Instructions

48LC

WeatherExpert

Series

Single Package Rooftop

Gas Heat/Electric Cooling Unit

with Puron

(R---410A) Refrigerant

Sizes: 14, 17, 20, 24, 26

NOTE

: Read the entire instruction manual before starting

the installation.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . .

Rated Indoor Airflow (cfm)

. . . . . . . . . . . . . . . . . . . . .

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Jobsite Survey

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 1 -- Plan for Unit Location

. . . . . . . . . . . . . . . . .

Roof Mount

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 2 -- Plan for Sequence of Unit Installation

. . . . .

Curb--Mounted Installation

. . . . . . . . . . . . . . . . . .

Pad--Mounted Installation

. . . . . . . . . . . . . . . . . . .

Frame--Mounted Installation

. . . . . . . . . . . . . . . . .

Step 3 -- Inspect Unit

. . . . . . . . . . . . . . . . . . . . . . . . . .

Step 4 -- Provide Unit Support

. . . . . . . . . . . . . . . . . .

Roof Curb Mount

. . . . . . . . . . . . . . . . . . . . . . . . .

Slab Mount (Horizontal Units Only)

. . . . . . . . . .

Alternate Unit Support

(In Lieu of Curb or Slab Mount)

. . . . . . . . . . . . .

Step 5 -- Field Fabricate Ductwork

. . . . . . . . . . . . . . .

Step 6 -- Rig and Place Unit

. . . . . . . . . . . . . . . . . . . .

Positioning on Curb

. . . . . . . . . . . . . . . . . . . . . . .

Step 7 -- Horizontal Duct Connection

. . . . . . . . . . . .

Step 8 -- Install Outside Air Hood — Factory Option

. .

Step 9 -- Install Flue Hood and Combustion Air Hood

Step 10 -- Install Gas Piping

. . . . . . . . . . . . . . . . . . . .

Gas Supply Line

. . . . . . . . . . . . . . . . . . . . . . . . . .

Factory--Option Thru--Base Connections

. . . . . . .

Step 11 -- Install External Condensate Trap and Line

. .

Step 12 -- Make Electrical Connections

. . . . . . . . . . .

Field Power Supply

. . . . . . . . . . . . . . . . . . . . . . . .

Units Without Factory--Installed

Non--Fused Disconnect or HACR

. . . . . . . . . . . . .

Units With 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 Conversion Kit

. . . . . . .

Heat Anticipator Settings

. . . . . . . . . . . . . . . . . . .

Transformer Connection

for 208--v Power Supply

. . . . . . . . . . . . . . . . . . . . .

RTU Open Controller (Factory--Installed Option)

. . .

SystemVu

Controller (Factory--Installed Option)

. .

Humidi--MiZer

System Control Connections

. . . .

Humidi--MiZer System -- Space RH Controller

. .

Integrated Staging Control (ISC) Board

. . . . . . . . . . .

ISC Board — Sequence of Operation

. . . . . . . . . . .

General

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ventilation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cooling

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Humidi--MiZer System (Optional)

. . . . . . . . . . . .

Economizer (Optional)

. . . . . . . . . . . . . . . . . . . . .

Low Ambient Cooling Operation

Down to 40

F (4

. . . . . . . . . . . . . . . . . . . . . . .

Heating

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

EconoMi$er

X (Factory--Installed Option)

. . . . . . .

Unit Installation

. . . . . . . . . . . . . . . . . . . . . . . . . .

Enthalpy Sensor Relocation

. . . . . . . . . . . . . . . . .

W7220 Economizer Controller

. . . . . . . . . . . . . . . .

User Interface

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Keypad

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Menu Structure

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connections and Applications

. . . . . . . . . . . . . . . . .

W7220 Economizer Module Wiring

. . . . . . . . . .

Economizer Controlled Configurations

. . . . . . . . . .

Enthalpy Changeover Control

. . . . . . . . . . . . . . .

Enthalpy Settings

. . . . . . . . . . . . . . . . . . . . . . . . .

Demand Controlled Ventilation

. . . . . . . . . . . . . .

Economizer Occupancy Control

. . . . . . . . . . . . . .

Summary of Contents for WeatherExpert 48LC

Page 1: ...ake Electrical Connections 25 Field Power Supply 25 Units Without Factory Installed Non Fused Disconnect or HACR 32 Units With Factory Installed Non Fused Disconnect or HACR 32 All Units 33 Convenience Outlets 33 HACR 34 Factory Option Thru Base Connections 35 Units Without Thru Base Connections 35 Field Control Wiring 35 Thermostat 35 Unit Without Thru Base Conversion Kit 35 Heat Anticipator Sett...

Page 2: ... 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 NFPA 70 National Electrical Code NEC in Canada CSA C22 1 for special requirements It is important to recognize safety information This is the safety alert ...

Page 3: ... maintenance operations on unit always turn off main power switch to unit and install lock s and lockout tag s Unit may have more than one power switch WARNING UNIT OPERATION AND SAFETY HAZARD Failure to follow this warning could cause personal injury death and or equipment damage Puronr R 410A refrigerant systems operate at higher pressures than standard R 22 systems Do not use R 22 service equip...

Page 4: ...h TXV and Humidi MiZer system Coil Options Fin Tube Condenser Evaporator Hail Guard A Al Cu Al Cu B Precoat 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 Guard Q E coat Al Cu E coat Al Cu Louvered Hail Guard R Cu Cu Al Cu Louvered Hail Guard S Cu...

Page 5: ...5 C13057 Fig 2 Unit Dimensional Drawing 14 Size Unit Sheet 1 of 3 ...

Page 6: ...6 C13058 Fig 2 cont Unit Dimensional Drawing 14 Size Unit Sheet 2 of 3 ...

Page 7: ...7 C13059 Fig 2 cont Unit Dimensional Drawing 14 Size Unit Sheet 3 of 3 ...

Page 8: ...8 C13032 Fig 3 Unit Dimensional Drawing 17 and 20 Size Units Sheet 1 of 3 ...

Page 9: ...9 C13033 Fig 3 cont Unit Dimensional Drawing 17 and 20 Size Units Sheet 2 of 3 ...

Page 10: ...10 C13034 Fig 3 cont Unit Dimensional Drawing 17 and 20 Size Units Sheet 3 of 3 ...

Page 11: ...11 C14106 Fig 4 Unit Dimensional Drawing 24 and 26 Size Units Sheet 1 of 3 ...

Page 12: ...12 C14107 Fig 4 cont Unit Dimensional Drawing 24 and 26 Size Units Sheet 2 of 3 ...

Page 13: ...13 C14108 Fig 4 cont Unit Dimensional Drawing 24 and 26 Size Units Sheet 3 of 3 ...

Page 14: ...al masonry 96 in 2438 mm Economizer and or Power Exhaust installed Check for sources of flue products with 10 feet 3 meters of economizer fresh air intake D 42 in 1067 mm Recommended clearance for service NOTE Unit not designed to have overhead obstruction Contact Application Engineering for guidance on any application planning overhead obstruction or for vertical clearances Fig 5 Service Clearanc...

Page 15: ...t to public walkways flue assembly must be at least 7 ft 2 1 m above grade Select a unit mounting system that provides adequate height to allow installation of condensate trap per requirements Refer to Step 11 Install External Condensate Trap and Line for required trap dimensions Roof Mount Check building codes for weight distribution requirements Unit operating weight is shown in Table 1 Step 2 P...

Page 16: ...in the gas section see Fig 7 for location Gas connections and power connections to the unit must be field installed after the unit is installed 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 see Fig 2 3 or 4 for basepan knockout locations for location Attach the service connections to the b...

Page 17: ...17 C13054 Fig 8 Roof Curb Details 14 Size Unit ...

Page 18: ...18 C13055 Fig 9 Roof Curb Details 17 and 20 Size Units ...

Page 19: ...19 C13056 Fig 10 Roof Curb Details 24 and 26 Size Units ...

Page 20: ...ep 6 Rig and Place Unit Keep unit upright and do not drop Spreader bars are not required if top crating is left on unit Rollers may be used to move unit across a roof Level by using unit frame as a reference See Table 1 on page 14 and Fig 11 below for additional information Lifting holes are provided in base rails as shown in Fig 11 Refer to rigging instructions on unit UNIT DAMAGE HAZARD Failure ...

Page 21: ...t equipped with an economizer on left end under the economizer hood The supply air duct connection is on the back side See Fig 12 for top view depicting typical horizontal duct arrangements Return Air Duct with Economizer Return Air Duct without Economizer Horizontal Supply Air C10626 Supply Return without Economizer Return with Economizer Location Back Back Left end Height In mm 157 8 402 493 8 1...

Page 22: ...el formed by the four angles installed in step 2 Make sure that the screens extend across the entire length of the hood 8 Install side filter supports using the screws provided 9 Install side drip angles using the screws provided 10 Run a continuous length of seal strip across the hood covering the engagement holes in the lower hood 11 Install top diverter using the screws provided 12 On units wit...

Page 23: ... unit gas valve Table 2 lists typical 3 4 inch NPT National Pipe Thread field supplied pipe fittings required for Thru Base gas supply starting from the unit gas valve see Fig 18 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 C10999 Fig 18 Gas Supply Line Piping with Thru Base Table 2 Typical 3 4 in NPT Field Supplied Piping Parts Item Qty Description 1 1 90 Deg Street Elbow 2 1 5 Inch Long Nipple 3 1 Ground...

Page 24: ...ollowed by a drip leg and ground joint union Route gas line into gas section through the grommet Part KA56SL112 at the gas inlet and into the gas valve See Fig 18 and Table 2 If a regulator is installed it must be located 4 feet 1 22 meters from the flue outlet Some municipal codes require that the manual shutoff valve be located upstream of the sediment trap See Fig 19 for typical piping arrangem...

Page 25: ... static difference A 4 102mm trap is recommended MINIMUM PITCH 1 25mm PER 10 3m OF LINE BASE RAIL OPEN VENT TO ROOF DRAIN DRAIN PLUG ROOF CURB SEE NOTE 3 76mm MIN C11291 Fig 23 Condensate Drain Piping Details All units must have an external trap for condensate drainage Install a trap at least 4 in 102 mm deep and protect against freeze up If drain line is installed downstream from the external tra...

Page 26: ... of TB1 Field power wires are connected to the unit at line side pressure lugs on the terminal block see wiring diagram label for control box component arrangement or at factory installed option non fused disconnect switch or HACR breaker Use copper conductors only NOTE Make field power connections directly to line connection pressure lugs only FIRE HAZARD Failure to follow this warning could resu...

Page 27: ...27 a48 9336 Fig 26 48LC 14 26 Electro mechanical Control Wiring Diagram ...

Page 28: ...28 a48 9337 Fig 27 48LC 14 26 RTU Open Control Wiring Diagram ...

Page 29: ...29 a48 9338 Fig 28 48LC 14 26 SystemVut Control Wiring Diagram ...

Page 30: ...30 C14112 Fig 29 Typical Power Wiring Diagram Electro mechanical and RTU Open Controls 48LC 14 20 208 230V Shown ...

Page 31: ...31 a48 9339 Fig 30 Typical Power Wiring Diagram SystemVut Controls 48LC 26 208 230V Shown ...

Page 32: ...r metal collar is at OFF 3 Insert the shaft with the cross pin on the top of the shaft in the horizontal position 4 Measure the tip of the shaft to the outside surface of the corner post to be 0 88 5 Tighten the locking screw to secure the shaft to the NFD 6 Turn the handle to OFF position with red arrow point ing at OFF 7 Install the handle on to the corner post vertically with the red arrow poin...

Page 33: ...ult in equipment damage 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 CAUTION Convenience Outlets ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or death Units with convenience outlet circuits may use multiple ...

Page 34: ...e unit disconnect switch is open See Fig 36 Test the GFCI receptacle by pressing the TEST button on the face of the receptacle to trip and open the receptacle Check for proper grounding wires and power line phasing if the GFCI receptacle does not trip as required Press the RESET button to clear the tripped condition Using unit mounted convenience outlets Units with unit mounted convenience outlet ...

Page 35: ...ce with the thermostat installation instructions If the thermostat contains a logic circuit requiring 24 v power use a thermostat cable or equivalent single leads of different colors with minimum of eight leads If the thermostat does not require a 24 v source no C connection required use a thermostat cable or equivalent with minimum of seven leads Check the thermostat installation instructions for...

Page 36: ...er must be rewired by moving the black wire with the 1 4 in female spade connector from the 230 v connection and moving it to the 208 v 1 4 in male terminal on the primary side of the transformer Refer to unit label diagram for additional information RTU Open Controller Factory Installed Option For details on operating 48LC 014 26 units equipped with the factory installed RTU Open option refer to ...

Page 37: ...2 or a ZS series sensor with humidity sensing SystemVut controls requires a Space Humidistat HL38MG029 or a Wall Mount Space Humidity Sensor 33ZCSENSRH 01 or a Duct Mount Humidity Sensor 33ZCSENDRH 01 To connect the Carrier humidistat HL38MG029 1 Route the humidistat 2 conductor cable field supplied through the hole provided in the unit corner post 2 Feed wires through the raceway built into the c...

Page 38: ... lights The Red LED light configuration will indicate the type of error the board has identified See Fig 43 for LED locations and Table 7 for a list of status codes The ISC board can be remotely shutdown by removing Jumper 4 and wiring to the Remote Shutdown terminal The Smoke Control Module can shutdown the unit by removing Jumper 3 and wiring to the Smoke Shutdown terminal The Smoke Alarm termin...

Page 39: ...n the room temperature and humidity are above the set point the unit initiates the sub cooling mode of operation a call for cooling and dehumidification RDV Reheat Discharge Valve and TWV Three Way Valve close Indoor and Outdoor airflow will rise until reaching 100 of Speed At hot gas bypass reheating mode reheat 2 when there is a call for dehumidification without a call for cooling a portion of t...

Page 40: ...the Heating Mode W1 and G on the thermostat the ISC board sends power to W on the IGC board Assuming the unit is controlled through a room thermostat set for fan auto the indoor fan motor will energize and the outdoor air dampers will open to their minimum position The ISC board upon seeing W1 and G ON will turn the indoor fan to high speed The IGC board starts its gas ignition process A check is ...

Page 41: ...utside air and mechanical cooling when required S Demand Controlled Ventilation DCV for modulating ventilation airflow according to space CO2 level requires factory option or field installed CO2 sensor The W7220 control also includes a new capability that will adjust the damper control points during DCV or minimum ventilation operation as the indoor fan speed is changed This control function ensur...

Page 42: ...MIZING NO YES NO ECONOMIZING ACTIVE YES Outside air being used for Cooling Stage 1 NO Economizing not active OCCUPIED NO YES NO OCCUPIED YES OCC signal received from space thermostat or unitary controller YES 24 Vac on terminal OCC NO 0 Vac on terminal OCC HEAT PUMP n a COOL HEAT HEAT PUMP MODE Not available on 2 Speed configuration COOL Y1 IN OFF ON OFF FIRST STAGE COOLING DEMAND Y1 IN Y1 I signa...

Page 43: ...er to maintain the mixed air temperature See Menu Note 2 LOW T LOCK 32_F 0_C 45 to 80_F 43 to 27_C increment by 1 COMPRESSOR LOW TEMPERATURE LOCKOUT Setpoint determines outdoor temperature when the mechanical cooling cannot be turned on DRYBLB SET 63_F 17_C 48 to 80_F 9 to 27_C increment by 1 OA DRY BULB TEMPERATURE CHANGEOVER SETPOINT Setpoint determines where the economizer will assume outdoor a...

Page 44: ...ECK AUX2 I and FANTYPE for required 2 speed values ADVANCED SETUP MA LO SET 45_F 7_C 35 to 55_F 2 to 12_C Incremented by 1_ SUPPLY AIR TEMPERATURE LOW LIMIT Temperature to achieve Freeze Protection close damper and alarm if 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 VENTM...

Page 45: ... is above expected range ACT STALLED n a n a ACTUATOR STALLED Actuator stopped before reaching commanded position Table 9 illustrates the complete hierarchy your menu parameters may be different depending on your configuration For example if you do not have a DCV CO2 sensor then none of the DCV parameters appear When values are displayed pressing and holding the Y or B button causes the display to...

Page 46: ...ity 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 Source Table 11 Economizer Module Right Hand Terminal Blocks Label Type Description Top Right Terminal Block N A n a The first terminal is not used AUX2 I 24 Vac IN Input from Thermostat W1 indicating base unit is in Heat mode damper controls to...

Page 47: ...1 AUX1 O E GND Y2 I Y1 I Y1 O C R Y2 O W7220 CONTROLLER W1 BLUE GRAY 1 2 3 4 ECONO ACTUATOR ENTHALPY SENSOR 1 2 a48 9348 Fig 49 Actuator S BUS Economizer Control Configurations Enthalpy Changeover Control Economizer changeover based on outdoor air enthalpy requires an outdoor air enthalpy sensor to replace the OAT sensor The enthalpy sensor is available as a factory installed option or as a field ...

Page 48: ...cal cooling energized and HL high limit when a compressor stage is energized Table 12 provides the values for each boundary limit TEMPERATURE ENTHALPY RA TEMP ABSOLUTE HUMIDITY ECONOMIXING AVAILABLE NOT AVAILABLE ES5 ES4 ES3 ES2 ES1 HL DUAL ENTHALPY HIGH LIMIT SINGLE ENTHALPY P2 T RH P1 T RH RA HUM RH C12015 Fig 50 Single Enthalpy Curve and Boundaries Table 12 Single Enthalpy and Dual Enthalpy Hig...

Page 49: ...Two Speed Fan System Ventilation codes require that the same ventilation rates Vbz and Va expressed as CFM be provided regardless of supply fan speed When the supply fan speed is reduced the internal static pressure in the unit s return plenum also decreases If the same outside air damper position is retained the airflow rate through the OA damper decreases below the Va and Vbz levels To restore v...

Page 50: ...T defines the space CO2 level above which the DCV mode begins to open the outside air damper beyond its VENTMIN ventilation lower limit This setpoint should be a minimum of 100 ppm greater than the outdoor ambient CO2 level to ensure the outside air will be capable of diluting the space CO2 level A typical value for outdoor CO2 is 400 ppm adjust the setpoint DCV SET to 500 ppm if outdoor CO2 level...

Page 51: ...condition immediately No economizing operation will be permitted until this alarm is cleared Table 14 SAT OAT Sensor Characteristics Deg C Ohms Deg F Ohms 30 415156 20 386130 25 301540 0 193070 20 221210 20 101820 15 163834 32 70200 10 122453 40 55420 5 92382 45 47771 0 70200 50 41258 5 53806 55 35725 10 41561 60 31035 15 32341 65 27069 20 25346 70 23719 25 20000 77 20000 30 15886 80 18473 35 1269...

Page 52: ...and Controlled Ventilation CO2 sensor connected The supply fan speed is included in these tables for reference this is neither an input or output of the W7220 controller Base Unit Controls Base unit includes standard electro mechanical controls Staged Air Volume 3 speed supply fan motor with VFD EconoMi erR X with W7220 controller and thermostat or unitary controller that energizes the G terminal ...

Page 53: ...rol will modulate the outside air damper open and closed to maintain the unit cooling supply air temperature at setpoint MAT SET default 53_F 12_C Compressor will not run During free cooling operation a supply air temperature SAT above MAT SET will cause the outside air damper to modulate between MIN POS L setpoint and 100 open As SAT decreases and approaches setpoint MA LO SET default 45_F 7_C th...

Page 54: ...re continues to fall and space cooling load is satisfied the thermostat will remove its call for first stage cooling ISC terminal Y1 call is removed The W7220 input Y1 I is removed free cooling mode ends Outside air damper will remain at MIN POS L if supply fan remains in operation CONT FAN or to closed if supply fan stops AUTO FAN Should 100 outside air and second stage cooling Compressor 1 opera...

Page 55: ...nfiguration involves stepping through three menus and enabling required functions and re selecting setpoints to meet project requirements The menus used are SYSTEM SETUP ADV SETUP and SETPOINTS Obtain a copy of the project control specifications before starting setup and configuration process NOTE W7220 will be in the set up mode for the first 60 minutes after powered If a sensor for OA air or S b...

Page 56: ...d fan system are correct Troubleshooting Power Up Delay Upon power up or after a power outage or brownout the W7220 controller module begins a 5 minute power up delay before enabling mechanical cooling Power Loss Outage or Brownout All setpoints and advanced settings are restored after any power loss or interruption NOTE If the power goes below 18 Vac the W7220 controller module assumes a power lo...

Page 57: ...ontrol 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 the outdoor damper should drive open or closed with the return air damper having the opposite effect How do I set my minimum position The minimum position is set using the VENTMIN and VENTMAX setup in the S...

Page 58: ...58 a48 9340 Fig 55 Typical EconoMi erR X Wiring Diagram ...

Page 59: ...ntroller for operation of 1 speed or 2 speed indoor fan system See Menu Note 4 on page 45 FAN CFM 5000cfm 100 to 15000 cfm UNIT DESIGN AIRFLOW CFM Enter ONLY if using DCVCAL ENA AUTO The value is found in the Project Submittal documents for the specific RTU AUX OUT NONE NONE ERV EXH2 SYS Select OUTPUT for AUX1 O relay NONE not configured output is not used ERV Energy Recovery Ventilator EXH2 secon...

Page 60: ... CAL 0 0 1 0_F or _C 2 5_F 1 4_C SUPPLY AIR TEMPERATURE CALIBRATION Allows for 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 1 4_C OUTSIDE AIR TEMPERATURE CALIBRATION Allows for the operator to adjust for an out of calibration outside air temperature OAT sensor OA H CAL 0 RH 10 RH OUTSIDE AIR HUMIDITY CALIBRATION Allows for the op...

Page 61: ...vel below the setpoint MIN POS L 6 0 V 2 to 10Vdc VENTILATION MINIMUM POSITION AT LOW SPEED Displays ONLY if a CO2 sensor is NOT connected MIN POS H 4 4 V 2 to 10Vdc VENTILATION MINIMUM POSITION AT HIGH SPEED Displays ONLY if a CO2 sensor is NOT connected VENTMAX L 6 0 V 2 to 10Vdc DCV MAXIMUM DAMPER POSITION AT LOW SPEED Requires CO2 sensor connected VENTMAX H 4 4 V 2 to 10Vdc DCV MAXIMUM DAMPER ...

Page 62: ...cooling operation the SAV system will adjust the fan motor to provide 66 of the design airflow rate for the unit When the call for the second stage of cooling is required the SAV system will allow the design airflow rate for the unit established 100 During the heating mode the SAV system will allow total design airflow rate 100 operation During ventilation mode the SAV system will operate the fan ...

Page 63: ...ve Navigation Keys and Status LEDs The Navigation keys and Status LEDs are detailed in the following table Alarm Warn On Com OK B a c k 3 4 1 2 5 6 5 7 C13114 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 LED Alarm Indicates an alarm 5 Arrows YB Use the Up and Down arrow keys to navigate b...

Page 64: ...riable frequency drive Use 2 of the screws included with the kit to secure the cable to the VFD 2 Connect the female end of the cable to the back panel of the VFD Remote keypad Secure the cable to the remote keypad using the 2 remaining screws from the kit Program the VFD for 3 Discrete Indoor Fan Speeds IMPORTANT 48LC 14 26 units are programmed at the factory for 3 discrete indoor fan speeds The ...

Page 65: ... Alarm 060 External Interlock a Press the Menu key twice to position the B tri angle icon over Main Menu the display changes to 0 Operation Display 1 Load and Motor b Press the B Down Arrow key until the follow ing display appears 4 Limits Warnings 5 Digital In Out c Press OK The display changes to 5 0 Digital I O mode 5 1 Digital Inputs d Press B Down Arrow once to highlight the bot tom row and p...

Page 66: ...r than the nameplate value Check the VFD Unit Parameters see Tables 21 25 on pages 70 74 and use the value listed for the given unit in the column labeled Motor Current Must Hold Amps m Press B Down Arrow once to display the following 1 25 Motor Nominal Speed 1740rpm n Press OK to highlight the rpm value and then use the Y and B Up and Down Arrow keys to select the nameplate rpm Press OK again to ...

Page 67: ...y appears 3 03 Maximum Reference 60 000 NOTE If the bottom row displays a number other than 60 000 press OK and use the Y and B Up and Down Arrow keys to select 60 000 f Press the Back key until the following display appears 3 0 Reference Limits 3 1 References g Press B Down Arrow once to move the high light to the bottom row and then press OK The following display appears 3 10 Preset Reference 0 ...

Page 68: ...ollowing display appears 4 19 Max Output Frequency 65 0Hz NOTE Press OK to highlight the Hz value and then use the Y and B Up and Down Arrow keys to enter the required values 10 Setting Digital Inputs a Press the Back key until the following display appears 3 Reference Ramps 4 Limits Warnings b Press B Down Arrow once the following display appears 4 Limits Warnings 5 Digital In Out c Press OK the ...

Page 69: ...following display appears 14 1 Mains On Off 14 2 Reset Functions e Press OK the following display appears 14 20 Reset Mode 0 Manual reset f Press OK to highlight the number in the bracket g Use the Y and B Up and Down Arrow keys to change the number to 3 for 3 automatic resets and then press OK The display changes to 14 20 Reset Mode 3 Automatic reset x 3 h Press B Down Arrow once the following di...

Page 70: ... 4 0 53 43 79 57 460V 14 ULTRA HD62FK654 HK30WA381 131L9868 1 122 15 460 60 13 7 1760 2 0 1 1 0 4 0 53 43 79 57 575V 14 ULTRA HD62FL576 HK30WA384 131N0229 1 132 15 575 60 8 9 1750 2 0 1 1 0 4 0 53 43 79 57 Preset Reference cont Ramp Up Time Sec Ramp Down Time Sec Current Limit Terminal 18 Digital Input Terminal 19 Digital Input Terminal 27 Digital Input Terminal 29 Digital Input Terminal 53 Low Vo...

Page 71: ... 4 0 56 64 82 40 460V 17 ULTRA HD64FK654 HK30WA386 131L9869 1 122 16 460 60 16 9 1755 2 0 1 1 0 4 0 56 64 82 40 575V 17 ULTRA HD64FL576 HK30WA388 131N0233 1 132 16 575 60 12 6 1755 2 0 1 1 0 4 0 56 64 82 40 Preset Reference cont Ramp Up Time Sec Ramp Down Time Sec Current Limit Terminal 18 Digital Input Terminal 19 Digital Input Terminal 27 Digital Input Terminal 29 Digital Input Terminal 53 Low V...

Page 72: ... 4 0 52 57 61 63 460V 20 ULTRA HD64FK654 HK30WA386 131L9869 1 122 16 460 60 16 9 1755 2 0 1 1 0 4 0 52 57 61 63 575V 20 ULTRA HD64FL576 HK30WA388 131N0233 1 132 16 575 60 12 6 1755 2 0 1 1 0 4 0 52 57 61 63 Preset Reference cont Ramp Up Time Sec Ramp Down Time Sec Current Limit Terminal 18 Digital Input Terminal 19 Digital Input Terminal 27 Digital Input Terminal 29 Digital Input Terminal 53 Low V...

Page 73: ... HD64FK654 HK30WA386 131L9869 1 122 16 460 60 16 9 1755 2 0 1 1 0 4 0 52 33 64 48 575V 24 HIGH HD64FL576 HK30WA388 131N0233 1 132 16 575 60 12 6 1755 2 0 1 1 0 4 0 52 33 64 48 Preset Reference cont Ramp Up Time Sec Ramp Down Time Sec Current Limit Terminal 18 Digital Input Terminal 19 Digital Input Terminal 27 Digital Input Terminal 29 Digital Input Terminal 53 Low Voltage Terminal 53 High Voltage...

Page 74: ...HD64FK654 HK30WA386 131L9869 1 122 16 460 60 16 9 1755 2 0 1 1 0 4 0 60 00 72 00 575V 26 HIGH HD64FL576 HK30WA388 131N0233 1 132 16 575 60 12 6 1755 2 0 1 1 0 4 0 60 00 72 00 Preset Reference cont Ramp Up Time Sec Ramp Down Time Sec Current Limit Terminal 18 Digital Input Terminal 19 Digital Input Terminal 27 Digital Input Terminal 29 Digital Input Terminal 53 Low Voltage Terminal 53 High Voltage ...

Page 75: ... STD 24 4 30 26 119 29 2 35 31 127 26 1 30 28 121 30 9 35 33 129 MED 26 1 30 28 133 30 9 35 33 141 27 8 30 30 135 32 6 40 35 143 HIGH 27 1 30 29 131 31 9 35 34 139 28 8 35 31 133 33 6 40 36 141 ULTRA 29 0 35 31 158 33 8 40 36 166 30 7 35 33 160 35 5 40 38 168 17 208 230 3 60 STD 67 4 66 6 90 90 70 69 371 79 2 78 4 100 100 83 82 391 72 2 71 4 90 90 75 74 376 84 0 83 2 100 100 89 88 396 MED 80 0 100...

Page 76: ...45 3 50 48 240 42 2 50 45 234 47 0 60 50 242 24 208 230 3 60 STD 101 9 125 108 538 113 7 125 121 558 106 7 125 113 543 118 5 150 127 563 MED 108 7 125 115 612 120 5 150 129 632 113 5 125 121 617 125 3 150 135 637 HIGH 119 0 150 126 652 130 8 150 140 672 123 8 150 132 657 135 6 150 145 677 460 3 60 STD 56 6 70 60 278 62 8 80 67 290 58 8 70 62 280 65 0 80 70 292 MED 60 6 70 65 315 66 8 80 72 327 62 ...

Page 77: ...119 29 2 35 31 127 26 1 30 28 121 30 9 35 33 129 MED 26 1 30 28 133 30 9 35 33 141 27 8 30 30 135 32 6 40 35 143 HIGH 27 1 30 29 131 31 9 35 34 139 28 8 35 31 133 33 6 40 36 141 ULTRA 29 0 35 31 158 33 8 40 36 166 30 7 35 33 160 35 5 40 38 168 17 208 230 3 60 STD 67 4 67 4 90 90 70 69 371 79 2 79 2 100 100 83 82 391 72 2 72 2 90 90 75 74 376 84 0 84 0 100 100 89 88 396 MED 80 0 100 84 410 91 8 100...

Page 78: ... 2 50 45 234 47 0 60 50 242 24 208 230 3 60 STD 101 9 125 108 538 113 7 125 121 558 106 7 125 113 543 118 5 150 127 563 MED 108 7 125 115 612 120 5 150 129 632 113 5 125 121 617 125 3 150 135 637 HIGH 119 0 150 126 652 130 8 150 140 672 123 8 150 132 657 135 6 150 145 677 460 3 60 STD 56 6 70 60 278 62 8 80 67 290 58 8 70 62 280 65 0 80 70 292 MED 60 6 70 65 315 66 8 80 72 327 62 8 80 67 317 69 0 ...

Page 79: ...ame for either 208 or 230 volts 3 Unbalanced 3 Phase Supply Voltage Never operate a motor where a phase imbalance in supply voltage is greater than 2 Use the following formula to determine the percentage of voltage imbalance Voltage Imbalance 100 x max voltage deviation from average voltage average voltage Example Supply voltage is 230 3 60 AB 224 v BC 231 v AC 226 v Average Voltage 224 231 226 68...

Page 80: ...he bottom of the tube facing into the bottom return duct opening For horizontal applic ation position the sampling holes on the side of the tube facing the unit s end panel 4 Insert the sampling tube into the return air sensor module until the tube snaps into position 5 Replace end panel or outside air hood Smoke Detector Test Magnet Locate the magnet it is shipped in the control box area Addition...

Page 81: ... shaft and the blower shaft 2 Set the tension gauge to the desired tension see Table 1 in Fig 66 Place the large O ring at that point 3 Press the tension checker downward on the belt until the large O ring is at the bottom of the straightedge 4 Adjust the belt tension as needed Adjust belt tension by loosing the motor mounting plate front bolts and rear bolt see Fig 67 on page 82 and sliding the p...

Page 82: ...anical installation of the unit Refer to the unit s Service and Maintenance manual for detailed Pre Start and Start up instructions ECarrier Corporation 2018 Edition Date 4 18 618 Printed in U S A Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Catalog No 48LC 14 26 05SI Replaces 48LC 14 26 04SI ...

Page 83: ...HAT INDOOR AIR FILTERS ARE CLEAN AND IN PLACE j CHECK THAT OUTDOOR AIR INLET SCREENS ARE IN PLACE j VERIFY THAT UNIT IS LEVEL j CHECK FAN WHEELS AND PROPELLER FOR LOCATION IN HOUSING ORIFICE AND VERIFY SETSCREW IS TIGHT j VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED j VERIFY THAT SCROLL COMPRESSORS ARE ROTATING IN THE CORRECT DIRECTION j VERIFY INSTALLATION OF THERMOSTAT j ...

Page 84: ...UBCOOLER BY CLOSING HUMIDISTAT WITH Y1 CLOSED OBSERVE j A REDUCTION IN SUCTION PRESSURE 5 TO 7 PSI EXPECTED j B DISCHARGE PRESSURE UNCHANGED j C LIQUID TEMPERATURE DROPS TO 50 TO 55_F RANGE j D LSV SOLENOID ENERGIZED VALVE CLOSES j 6 SWITCH UNIT TO DEHUMID REHEAT BY OPENING Y1 OBSERVE j A SUCTION PRESSURE INCREASES TO NORMAL COOLING LEVEL j B DISCHARGE PRESSURE DECREASES 35 TO 50 PSI j C LIQUID TE...

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Carrier WeatherExpert 48LC, Installation Instructions Manual

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