Carrier 48HJ004---007 HUMIDI-MIZERADAPTIVE Dehumidification System, Manual outdoor damper

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Step 8 —Adjust Factory-Installed Options

cobra™ energy recovery units

Please refer to the supplement provided for information on installing and operating the factory optional COBRA Energy Recovery Units. These units are equipped with a factory-installed energy recovery unit and have different installation and operation procedures than the standard unit.

HUMIDI-MIZER™ADAPTIVE DEHUMIDIFICATION

SYSTEM

Humidi-MiZer system operation can be controlled by field installation of a Carrier-approved humidistat. (See Fig. 16.)

NOTE: A light commercial Thermidistat™ device (Fig. 17) can be used instead of the humidistat if desired. The Thermidistat device includes a thermostat and a humidistat. The humidistat is normally used in applications where a temperature sensor is already provided (units with PremierLink™ control).

% RELATIVE HUMIDITY

C06126

Fig. 16 ---Accessory Field-Installed Humidistat

C06127

Fig. 17 ---Light Commercial Thermidistat Device

To install the humidistat:

1.Route humidistat cable through hole provided in unit control box.

2.Some models may be equipped with a raceway built into the corner post located on the left side of control box (See Fig. 15). This raceway provides the required clearance between high-voltage and low voltage wiring. For models without a raceway, ensure to provide the NEC required clearance between the high-voltage and low-voltage wiring.

3.Use a wire nut to connect humidistat cable into low- voltage wiring as shown in Fig. 18.

To install Thermidistat device:

1.Route Thermidistat cable through hole provided in unit control box.

2.Some models may be equipped with a raceway built into the corner post located on the left side of control box (See Fig. 15). This raceway provides the required clearance between high-voltage and low voltage wiring. For models without a raceway, ensure to provide the NEC required clearance between the high-voltage and low-voltage wiring.

3.A field-supplied relay must be installed between the Thermidistat and the Humidi-Mizer circuit (recommended relay: HN612KK324). (See Fig. 19.) The relay coil is connected between the DEHUM output and C (common) of the unit. The relay controls the Humidi-MiZer solenoid valve and must be wired between the Humidi-MiZer fuse and the low-pressure switch. Refer to the installation instructions included with the Carrier Light Commercial Thermidistat device for more information.

manual outdoor damper

The outdoor-air hood and screen are attached to the basepan at the bottom of the unit for shipping.

Assembly:

1.Determine quantity of ventilation required for building. Record amount for use in Step 8.

2.Remove and save outdoor air opening panel and screws. (See Fig. 20.)

3.Remove evaporator coil access panel. Separate hood and screen from basepan by removing the 4 screws securing them. Save all screws.

4.Replace evaporator coil access panel.

5.Place hood on front of outdoor air opening panel. See Fig. 21 for hood details. Secure top of hood with the 4 screws removed in Step 3. (See Fig. 22.)

6.Remove and save 6 screws (3 on each side) from sides of the manual outdoor-air damper.

7.Align screw holes on hood with screw holes on side of manual outdoor-air damper. (See Fig. 21 and 22.) Secure hood with 6 screws from Step 6.

8.Adjust minimum position setting of the damper blade by adjusting the manual outdoor-air adjustment screws on the front of the damper blade. (See Fig. 20.) Slide blade vertically until it is in the appropriate position determined by Fig. 23. Tighten screws.

9.Remove and save screws currently on sides of hood. Insert screen. Secure screen to hood using the screws. (See Fig. 22.)

convenience outlet

An optional convenience outlet provides power for rooftop use. For maintenance personnel safety, the convenience outlet power is off when the unit disconnect is off. Adjacent unit outlets may be used for service tools.

novar controls

Optional Novar controls (ETM 3051) are available for replacement or new construction jobs.

48HE,HJ

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Contents Electrical Shock Hazard Installation InstructionsAlternate 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 Nominal Capacity Physical Data 48HJHJE HJD Physical Data 48HE HEE HED Power Wiring Connections 48HE003---006 Electrical Data 48HEElectrical Data 48HJ 38.2 242 208/230---3---60 187 254 12.4 HUMIDI-MIZERADAPTIVE Dehumidification System AssemblyManual outdoor damper Convenience outletTypical Humidi-MiZer t Adaptive Dehumidification System Outdoor Air Temperature Sensor OAT Install the Supply Air Temperature SAT SensorInstall the Indoor Air Quality CO2 Sensor Enthalpy Sensors and ControlPremierLink Controller PremierLinkSensor UsagePremierLinktController Installed EconoMi$er IV Component Locations Return Air Enthalphy SensorECONOMI$ER IV Standard Sensors Outdoor Air Temperature OAT SensorECONOMI$ER IV Control Modes RUN EconoMi$er IV WiringIndoor Air Quality IAQ Sensor Input Exhaust Set Point AdjustmentDifferential Enthalphy Control Damper Movement Minimum Position ControlThermostats Demand Controlled Ventilation DCV Enthalpy Changeover Set PointsBelt drive motors Adjust Evaporator-Fan SpeedDehumidification of Fresh Air with DCV Control Belt Drive Motor Mounting CO2Sensor Standard SettingsAccessory static pressure 48HJ Fan Rpm at Motor Pulley Setting With High-Static MotorEvaporator-Fan Motor Data Standard Motor Evaporator-Fan Motor Data High-Static Motors48HE Outdoor Sound Power Total Unit 48HJ Outdoor Sound Power Total UnitUnit ARI Octave Bands Rating Airflow1100 Rpm Bhp1200 1300Rpm Bhp Watts Watts Rpm Bhp 1200 Rpm Bhp Watts1600 17001642 2333 1704 Rpm Bhp Watts 15002600 Watts Rpm Bhp 18002700 2800Bhp 600 Bhp Watts Rpm2700 2800 2900 3000 Watts Rpm Bhp 900 Bhp Watts 900Watts Rpm Bhp Watts 1700 1800 1900 20001900 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 Refrigerant Service Ports Internal WiringUnit Preparation Gas PipingHeating CoolingMain Burners Ventilation Continuous Fan Safety ReliefOperating Sequence Cooling units without economizer Heating units without economizerRoutine 3 OAT DX Cooling Temperature Control ExampleNormal Design Operation Subcooling ModeUnits with HUMIDI-MIZERADAPTIVE Dehumidification System Evaporator Coil CleaningCondenser coil One-Row CoilsHigh Pressure Switch Condenser-Fan AdjustmentFilters Lubrication CompressorHUMIDI-MIZERSYSTEM Charging Cooling Charging Chart Standard 48HJ006 To USE Cooling Charging CHART, Standard Unit Combustion-Air Blower Flue Gas PassagewaysLED Error Code Description Limit SwitchRemoval and Replacement of GAS Train See Burner IgnitionLOW Heat Replacement PartsOFM Economi$er IV Troubleshooting Unit TroubleshootingDcv demand controlled ventilation and power exhaust Economi$er IV troubleshooting completionSymptom Cause Remedy LED Error Code Service AnalysisComponent Damage Hazard LED OFFProblem Cause Remedy Heating Service AnalysisCooling Service Analysis Inputs Outputs EconoMi$er IV Input/Output LogicSTART-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.
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