Carrier 48HE003---006, 48HJ004---007 installation instructions Cooling, Main Burners, Heating

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48HE,HJ

2.Turn off power to the unit and tag disconnect.

3.Reverse any two of the unit power leads.

4.Turn on power to the unit and energize the compressor.

The suction and discharge pressure levels should now move to their normal start-up levels.

NOTE: When the compressor is rotating in the wrong direction, the unit makes more noise and does not provide cooling.

Step 10 Cooling

Set the space thermostat to the OFF position. Set the system selector switch at COOL position and the fan switch at AUTO position. Adjust the thermostat to a setting below room temperature. The compressor starts when contactor closes.

Check the unit charge. Refer to Refrigerant Charge section.

Reset the thermostat at a position above room temperature. The compressor will shut off. Evaporator fan will shut off after a 30-second delay.

To Shut Off Unit - Set the system selector switch at OFF position. Resetting the thermostat at a position above room temperature shuts off the unit temporarily until the space temperature exceeds the thermostat setting. Units are equipped with a Cycle-LOCprotection device. The unit shuts down on any safety trip and remains off; an indicator light on the thermostat comes on. Check the reason for the safety trip.

Step 11 Main Burners

Main burners are factory set and should require no adjustment.

TO CHECK ignition of main burners and heating controls, move thermostat set point above room temperature and verify that the burners light and evaporator fan is energized. Check heating effect, then lower the thermostat setting below the room temperature and verify that the burners and evaporator fan turn off.

Refer to Tables 37 and 38 for the correct orifice to use at high altitudes.

Table 37—Altitude Compensation*

48HJ004-007, 48HE003-006 Standard Units

 

72,000 AND

150,000 BTUH

 

115,000 BTUH

 

NOMINAL INPUT

ELEVATION

NOMINAL INPUT

 

 

(ft)

Natural

Liquid

Natural

Liquid

Gas

Propane

Gas

Propane

 

 

Orifice

Orifice

Orifice

Orifice

 

Size†

Size†

Size†

Size†

0-2,000

33

43

30

37

2,000

36

44

31

39

3,000

36

45

31

40

4,000

37

45

32

41

5,000

38

46

32

42

6,000

40

47

34

43

7,000

41

48

35

43

8,000

42

49

36

44

9,000

43

50

37

45

10,000

44

50

39

46

11,000

45

51

41

47

12,000

46

52

42

48

13,000

47

52

43

49

14,000

48

53

44

50

*As the height above sea level increases, there is less oxygen per cubic foot of air. Therefore, heat input rate should be reduced at higher alti- tudes.

†Orifices available through your Carrier distributor.

Table 38—Altitude Compensation* —

48HJ004-006, 48HE003-006 Low NOx Units

 

60,000 AND

120,000 BTUH

 

90,000 BTUH

 

NOMINAL INPUT

 

NOMINAL INPUT

ELEVATION

 

 

(ft)

Natural

Liquid

Natural

Liquid

Gas

Propane

Gas

Propane

 

 

Orifice

Orifice

Orifice

Orifice

 

Size†

Size†

Size

Size†

0-2,000

38

45

32

42

2,000

40

47

33

43

3,000

41

48

35

43

4,000

42

49

36

44

5,000

43

49

37

45

6,000

43

50

38

45

7,000

44

50

39

46

8,000

45

51

41

47

9,000

46

52

42

48

10,000

47

52

43

49

11,000

48

53

44

50

12,000

49

53

44

51

13,000

50

54

46

52

14,000

51

54

47

52

*As the height above sea level increases, there is less oxygen per cubic foot of air. Therefore, the input rate should be reduced at higher alti- tudes.

†Orifices are available through your local Carrier distributor.

Step 12 Heating

1.Purge gas supply line of air by opening union ahead of the gas valve. If gas odor is detected, tighten union and wait 5 minutes before proceeding.

2.Turn on electrical supply and manual gas valve.

3.Set system switch selector at HEAT position and fan switch at AUTO or ON position. Set heating temperature lever above room temperature.

4.The induced-draft motor will start.

5.After a call for heating, the main burners should light within 5 seconds. If the burner does not light, then there is a 22-second delay before another 5-second try. If the burner still does not light, the time delay is repeated. If the burner does not light within 15 minutes, there is a lockout. To reset the control, break the 24 v power to W1.

6.The evaporator-fan motor will turn on 45 seconds after burner ignition.

7.The evaporator-fan motor will turn off in 45 seconds after the thermostat temperature is satisfied.

8.Adjust airflow to obtain a temperature rise within the range specified on the unit nameplate.

NOTE: The default value for the evaporator-fan motor on/off delay is 45 seconds. The Integrated Gas Unit Controller (IGC) modifies this value when abnormal limit switch cycles occur. Based upon unit operating conditions, the on delay can be reduced to 0 seconds and the off delay can be extended to 180 seconds. When one flash of the LED (light-emitting diode) is observed, the evaporator-fan on/off delay has been modified.

If the limit switch trips at the start of the heating cycle during the evaporator on delay, the time period of the on delay for the next cycle will be 5 seconds less than the time at which the switch tripped. (Example: If the limit switch trips at 30 seconds, the evaporator-fan on delay for the next cycle will occur at 25 seconds.) To prevent short-cycling, a 5-second reduction will only occur if a minimum of 10 minutes has elapsed since the last call for heating.

The evaporator-fan off delay can also be modified. Once the call for heating has ended, there is a 10-minute period during which the modification can occur. If the limit switch trips during this period, the evaporator-fan off delay will increase by 15 seconds.

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Contents Installation Instructions Electrical Shock HazardRoof Curb FIRE, Explosion HazardAlternate Unit Support 48HE,HJ Property Damage Hazard Install Flue HoodPositioning 48HE Unit Operating Dimensions Weight48HJ 48HJ004-007 Base Unit Dimensions 48HE003-006 Base Unit Dimensions Field control wiring Field power supplyHeat anticipator settings 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 Manual outdoor damper AssemblyHUMIDI-MIZERADAPTIVE Dehumidification System Convenience outletTypical Humidi-MiZer t Adaptive Dehumidification System Install the Indoor Air Quality CO2 Sensor Install the Supply Air Temperature SAT SensorOutdoor Air Temperature Sensor OAT 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 RUNDifferential Enthalphy Control Exhaust Set Point AdjustmentIndoor Air Quality IAQ Sensor Input Thermostats Minimum Position ControlDamper Movement Enthalpy Changeover Set Points Demand Controlled Ventilation DCVDehumidification of Fresh Air with DCV Control Adjust Evaporator-Fan SpeedBelt drive motors CO2Sensor Standard Settings Belt Drive Motor MountingEvaporator-Fan Motor Data Standard Motor 48HJ Fan Rpm at Motor Pulley Setting With High-Static MotorAccessory static pressure Evaporator-Fan Motor Data High-Static MotorsUnit ARI Octave Bands Rating 48HJ Outdoor Sound Power Total Unit48HE Outdoor Sound Power Total Unit Airflow1200 Rpm Bhp1100 1300Rpm Bhp Watts 1600 Rpm Bhp WattsWatts Rpm Bhp 1200 1700Rpm Bhp Watts 1500 1642 2333 17042700 Watts Rpm Bhp 18002600 28002700 2800 2900 3000 Bhp Watts RpmBhp 600 Watts Rpm Bhp Watts 900Watts Rpm Bhp 900 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 Unit Preparation Internal WiringRefrigerant Service Ports Gas PipingMain Burners CoolingHeating Operating Sequence Cooling units without economizer Safety ReliefVentilation Continuous Fan Heating units without economizerDX Cooling Temperature Control Example Routine 3 OATUnits with HUMIDI-MIZERADAPTIVE Dehumidification System Subcooling ModeNormal Design Operation Condenser coil CleaningEvaporator Coil One-Row CoilsFilters Condenser-Fan AdjustmentHigh Pressure Switch Lubrication CompressorHUMIDI-MIZERSYSTEM Charging Cooling Charging Chart Standard 48HJ006 To USE Cooling Charging CHART, Standard Unit Flue Gas Passageways Combustion-Air BlowerRemoval and Replacement of GAS Train See Limit SwitchLED Error Code Description Burner IgnitionReplacement Parts LOW HeatOFM Dcv demand controlled ventilation and power exhaust Unit TroubleshootingEconomi$er IV Troubleshooting Economi$er IV troubleshooting completionComponent Damage Hazard LED Error Code Service AnalysisSymptom Cause Remedy 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.