Carrier 48HE003---006 Field power supply, Field control wiring, Heat anticipator settings

Page 8

C06114

Fig. 10 ---Flue Hood Details

48HE,HJ

LEGEND

NFGC — National Fuel Gas Code *Field supplied.

NOTE: Follow all local codes.

SPACING OF SUPPORTS

STEEL PIPE

SPACING OF SUPPORTS

NOMINAL DIAMETER (in.)

X DIMENSION (ft)

1/2

6

3/4 or 1

8

11/4 or larger

10

C06115

Fig. 11 ---Gas Piping Guide (With Accessory

Thru-the-Curb Service Connections)

Step 7 Make Electrical Connections

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with NEC (National Electrical Code), ANSI/NFPA (National Fire Protection Association), latest edition, and local electrical codes. Do not use gas piping as an electrical ground.

field power supply

All units except 208/230-v units are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is to be connected to a 208-v power supply, the transformer must be rewired by moving the black wire from the 230-v terminal on the transformer and connecting it to the 200-v terminal from the transformer.

Refer to unit label diagram for additional information. Pigtails are provided for field service. Use factory-supplied splices or UL (Underwriters’ Laboratories) approved copper connector.

When installing units, provide a disconnect per NEC.

All field wiring must comply with NEC and local requirements.

Install conduit through side panel openings indicated in Fig. 8. Route power lines through connector to terminal connections as shown in Fig. 12.

Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate (also see Tables 3 and 4). On 3-phase units, voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in Tables 3 and 4, Note 3 to determine the percent voltage imbalance. 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: If accessory thru-the-bottom connections and roof curb are used, refer to the Thru-the-Bottom Accessory Installation Instructions for information on power wiring and gas connection piping. The power wiring, control wiring and gas piping can be routed through field-drilled holes in the basepan. The basepan is specially designed and dimpled for drilling the access connection holes. (See Fig. 2.)

field control wiring

Install a Carrier-approved accessory thermostat assembly according to installation instructions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature in accordance with thermostat installation instructions.

Route thermostat cable or equivalent single leads of colored wire from subbase terminals through connector on unit to low-voltage connections (shown in Fig. 13 and 14).

Connect thermostat wires to matching screw terminals of low-voltage connection board. (See Fig. 13 and 14.)

NOTE: For wire runs up to 50 ft, use no. 18 AWG (American Wire Gauge) insulated wire (35_C minimum). For 50 to 75 ft, use no. 16 AWG insulated wire (35_C minimum). For over 75 ft, use no. 14 AWG insulated wire (35_C minimum). All wire larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat.

Pass the control wires through the hole provided in the corner post; then feed wires through the raceway built into the corner post to the 24-v barrier located on the left side of the control box. (See Fig. 15). The raceway provides the UL required clearance between high and low-voltage wiring.

heat anticipator settings

Set heat anticipator settings at 0.14 amp for first stage and 0.14 for second stage heating, when available.

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Contents Installation Instructions Electrical Shock HazardAlternate Unit Support FIRE, Explosion HazardRoof Curb 48HE,HJ Positioning Install Flue HoodProperty Damage Hazard 48HJ Unit Operating Dimensions Weight48HE 48HJ004-007 Base Unit Dimensions 48HE003-006 Base Unit Dimensions Heat anticipator settings Field power supplyField control wiring Physical Data 48HJ Nominal CapacityHJE HJD Physical Data 48HE HEE HED Power Wiring Connections Electrical Data 48HE 48HE003---006Electrical Data 48HJ 38.2 242 208/230---3---60 187 254 12.4 Assembly HUMIDI-MIZERADAPTIVE Dehumidification SystemManual outdoor damper Convenience outletTypical Humidi-MiZer t Adaptive Dehumidification System Install the Supply Air Temperature SAT Sensor Outdoor Air Temperature Sensor OATInstall the Indoor Air Quality CO2 Sensor Enthalpy Sensors and ControlPremierLinkSensor Usage PremierLink ControllerPremierLinktController Installed Return Air Enthalphy Sensor EconoMi$er IV Component LocationsOutdoor Air Temperature OAT Sensor ECONOMI$ER IV Standard SensorsECONOMI$ER IV Control Modes EconoMi$er IV Wiring RUNIndoor Air Quality IAQ Sensor Input Exhaust Set Point AdjustmentDifferential Enthalphy Control Damper Movement Minimum Position ControlThermostats Enthalpy Changeover Set Points Demand Controlled Ventilation DCVBelt drive motors Adjust Evaporator-Fan SpeedDehumidification of Fresh Air with DCV Control CO2Sensor Standard Settings Belt Drive Motor Mounting48HJ Fan Rpm at Motor Pulley Setting With High-Static Motor Accessory static pressureEvaporator-Fan Motor Data Standard Motor Evaporator-Fan Motor Data High-Static Motors48HJ Outdoor Sound Power Total Unit 48HE Outdoor Sound Power Total UnitUnit ARI Octave Bands Rating AirflowRpm Bhp 11001200 1300Rpm Bhp Watts Rpm Bhp Watts Watts Rpm Bhp 12001600 1700Rpm Bhp Watts 1500 1642 2333 1704Watts Rpm Bhp 1800 26002700 2800Bhp 600 Bhp Watts Rpm2700 2800 2900 3000 Watts Rpm Bhp 900 Bhp Watts 900Watts Rpm 1700 1800 1900 2000 Bhp Watts1900 2000 2100 2200 2300 2400 2500 800 350 904 438 999 535 1087 640 1169 753 913 569 1250 1500 1750 2000 2250 2500 2750 3000 Internal Wiring Refrigerant Service PortsUnit Preparation Gas PipingHeating CoolingMain Burners Safety Relief Ventilation Continuous FanOperating Sequence Cooling units without economizer Heating units without economizerDX Cooling Temperature Control Example Routine 3 OATNormal Design Operation Subcooling ModeUnits with HUMIDI-MIZERADAPTIVE Dehumidification System Cleaning Evaporator CoilCondenser coil One-Row CoilsCondenser-Fan Adjustment High Pressure SwitchFilters Lubrication CompressorHUMIDI-MIZERSYSTEM Charging Cooling Charging Chart Standard 48HJ006 To USE Cooling Charging CHART, Standard Unit Flue Gas Passageways Combustion-Air BlowerLimit Switch LED Error Code DescriptionRemoval and Replacement of GAS Train See Burner IgnitionReplacement Parts LOW HeatOFM Unit Troubleshooting Economi$er IV TroubleshootingDcv demand controlled ventilation and power exhaust Economi$er IV troubleshooting completionLED Error Code Service Analysis Symptom Cause RemedyComponent Damage Hazard LED OFFHeating Service Analysis Problem Cause RemedyCooling Service Analysis EconoMi$er IV Input/Output Logic Inputs OutputsSTART-UP Checklist

48HJ004---007, 48HE003---006 specifications

Carrier has long been a trusted name in the HVAC industry, and its models 48HJ004---007 and 48HE003---006 continue that legacy, offering efficient, reliable climate control solutions. These models are designed for different applications, ensuring optimal performance in a variety of environments.

The 48HJ series features advanced rooftop units that are ideal for commercial settings. They come equipped with high-efficiency scroll compressors that provide superior cooling and heating capabilities. This series is noted for its compact design, allowing for easy installation on rooftops or other constrained spaces. The units offer variable capacity operation, which enables them to efficiently meet varying heating and cooling demands without unnecessary energy consumption.

One of the standout features of the 48HJ series is its use of advanced microprocessor controls. This technology allows for precise temperature management and system diagnostics, enhancing the ease of operation while ensuring maximum comfort. Additionally, the series supports advanced connectivity options, enabling integration with building management systems. This allows for remote monitoring and control, making it easier for facility managers to keep track of performance and energy usage.

On the other hand, the 48HE series specializes in high-efficiency heating and cooling performance. These units are designed for larger commercial spaces and come with robust features for enhanced durability and efficiency. Like the 48HJ series, the 48HE models utilize scroll compressors and are equipped with a high-efficiency fan setup for improved airflow and reduced noise levels.

The 48HE also includes an innovative heat pump option, which allows the system to reverse the cooling process to provide heating, making it versatile across different seasonal demands. Both series are designed with eco-friendly refrigerants that comply with the latest environmental regulations, ensuring a minimized ecological footprint.

In terms of energy efficiency, both the 48HJ and 48HE series hold impressive SEER and EER ratings, contributing to reduced operational costs over time. The units are also built with durable, corrosion-resistant materials, ensuring longevity and low maintenance needs.

In conclusion, Carrier 48HJ004---007 and 48HE003---006 models are designed with cutting-edge technology, energy efficiency, and flexibility in mind. Their robust features make them ideal choices for commercial applications, providing reliable comfort and operational excellence. Whether for cooling or heating, these systems stand out in performance and sustainability, earning Carrier's reputation as a leader in the HVAC market.