Carrier 48HJ015-025 Aha, Ifm, Ifr, Clo, Lor, Cls, Lps, Comp, Mat, Oat, Ofc, Fpt, Pgv, Hps, Pri

Page 27

LEGEND FOR FIG. 38 and 39

AHA

Ð Adjustable Heat Anticipator

IFM

Ð Indoor (Evaporator)

TH

Ð Thermostat Heating

BKR W/AT Ð Breaks with Amp Turns

 

Fan Motor

TRAN Ð Transformer

C

Ð Contactor, Compressor

IFR

Ð Indoor (Evaporator)

 

Terminal (Marked)

CB

Ð Circuit Breaker

 

Fan Relay

 

CC

Ð Cooling Compensator

IP

Ð Internal Protector

 

 

CH

Ð Crankcase Heater

L

Ð Light

 

Terminal (Unmarked)

CLO

Ð Compressor Lockout

LOR

Ð Lockout Relay

 

 

CLS

Ð Compressor Lockout Switch

LPS

Ð Low-Pressure Switch

 

Terminal Block

COMP

Ð Compressor Motor

LS

Ð Limit Switch

 

 

 

CR

Ð Control Relay

MAT

Ð Mixed-Air Thermostat

 

Splice

CT

Ð Current Transformer

MGV Ð Main Gas Valve

 

DM

Ð Damper Motor

NEC

Ð National Electrical Code

 

Splice (Marked)

DU

Ð Dummy Terminal

OAT

Ð Outdoor-Air Thermostat

 

EQUIP

Ð Equipment

OFC

Ð Outdoor (Condenser)

 

 

FPT

Ð Freeze Protection

 

Fan Contactor

 

Splice (Field Supplied)

 

Thermostat

OFM Ð Outdoor (Condenser)

 

 

FU

Ð Fuse

PGV

Fan Motor

 

Factory Wiring

GND

Ð Ground

Ð Pilot Gas Valve

 

 

HPS

Ð High-Pressure Switch

PL

Ð Plug Assembly

 

Field Control Wiring

HR

Ð Heat Relay

PRI

Ð Primary

 

 

HV

Ð High Voltage

PS

Ð Pressure Switch

 

Field Power Wiring

I

Ð Ignitor

QT

Ð Quadruple Terminal

 

 

ICP

Ð Ignitor Control Pack

R

Ð Relay

 

Accessory or Optional Wiring

IDM

Ð Induced-Draft Motor

RS

Ð Rollout Switch

 

To Indicate Common Potential Only,

IDR

Ð Induced-Draft Relay

SN

Ð Sensor

 

IFC

Ð Indoor (Evaporator)

SW

Ð Switch

 

Not To Represent Wiring

 

Fan Contactor

TB

Ð Terminal Block

 

 

IFCB

Ð Indoor (Evaporator)

TC

Ð Thermostat Cooling

 

 

 

Fan Circuit Breaker

TDR

Ð Time Delay Relay

 

 

NOTES:

1.Compressor and fan motors thermally protected; 3-phase motors protected against primary single-phasing conditions.

2.If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire or its equivalent.

3.Jumpers are omitted when unit is equipped with economizer.

4.Set thermostat heat anticipator(s):

UNIT

W1

W2

VOLTAGE

48HJD015

1.20

Ð

All

48HJD025, HJE015,

1.20

0.60

All

HJE017

 

 

 

5.CB must-trip amps are equal to or less than 140% full load amps.

6.Number(s) indicates the line location of used contacts. A bracket over (2) numbers signi®es a single-pole, double-throw contact. An underlined number signi®es a normally-closed contact. A plain (no line) number signi®es a normally-open contact.

7.The CLO locks out the compressor to prevent short cycling on com- pressor overload and safety devices. Before replacing CLO, check these devices.

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Contents Contents Safety ConsiderationsInstallation 50DP900211 Accessory Curb Description``A ``B ``C Package no HeightDimension a Unit Maximum Shipping WeightUnit Physical Data Base Unit Dimensions, 48HJ015,017 Base Unit Dimensions, 48HJ025 Air Distribution Ð Through-the-Bottom 48HJ017 and 025 Shown Combustion Fan Housing Location GND Make Electrical ConnectionsElectrical Data EquipMake Outdoor-Air Inlet Adjustments Unit Voltage Unit48HJD015 All 48HJD025, HJE015 HJE017 Economizer Motor Control Module Location START-UP Accessory Field-Installed Economizer AdjustÐ Fan Performance Data, 48HJ015, 208/230, 460-V Units AirflowFiop Ð Fan Performance Data, 48HJ015, 575-V Units Fan Performance Data, 48HJ017 Units Fan Performance Data, 48HJ025 Units Air Quantity LimitsUnit 48HJ Minimum CFM Maximum CFM Pressure Drop Accessory/FIOP Economizer Static Pressure in. wgBase Unit Operation Unit CFM EconomizerLubrication ServiceEvaporator Fan, 48HJ015 Units Evaporator Fan, 48HJ017,025 UnitsManufacturer Lubricant Condenser-Fan Adjustment Belt Tension Adjustment Ð To adjust belt tensionHigh and Low Outdoor-Air Temperature Economizer Checkout ProceduresGas Valve Adjustment Pilot AdjustmentMain Burner Removal Protective DevicesTypical Wiring Schematic 48HJ025 Shown Typical Wiring Schematic 48HJ025 Shown Typical Component Arrangement 48HJ025 Shown CLO AHAIFM IFRPage Page Packaged Service Training Page PRE-START-UP START-UP Checklist

48HJ015-025 specifications

The Carrier 48HJ015-025 is a distinguished series of rooftop packaged units renowned for their efficient performance and reliability in light commercial applications. Designed for a variety of indoor environments, these units are engineered to provide efficient heating and cooling solutions, making them suitable for retail spaces, offices, and other commercial buildings.

One of the main features of the Carrier 48HJ series is its advanced scroll compressor technology, which enhances the overall efficiency of the systems. This type of compressor is known for its durability and quiet operation, providing consistent temperature control while minimizing energy consumption. The use of a scroll compressor contributes to a higher Seasonal Energy Efficiency Ratio (SEER) and Heating Seasonal Performance Factor (HSPF), making these units a smart choice for energy-conscious businesses.

Additionally, the 48HJ series incorporates a multi-speed indoor blower that allows for precise airflow control. This feature ensures optimal indoor comfort by adjusting the air distribution based on the specific heating or cooling needs of the space. The ability to adapt to varying load conditions enhances efficiency and reduces energy wastage.

Another noteworthy characteristic of the Carrier 48HJ015-025 is its robust construction. Built with galvanized steel, the units are designed to withstand harsh environmental conditions, ensuring longevity and minimal maintenance requirements. The powder-painted finish offers corrosion resistance, contributing to the unit’s durability over time.

The series also integrates advanced controls for ease of operation. The user-friendly thermostat enables precise temperature management and can be programmed according to the specific needs of the facility. Moreover, compatibility with Building Management Systems (BMS) facilitates seamless integration into existing infrastructure, enabling remote monitoring and enhanced operational efficiency.

In terms of environmental considerations, the Carrier 48HJ series utilizes R-410A refrigerant, which is known for its reduced impact on the ozone layer compared to older refrigerants. This commitment to sustainability aligns with modern environmental standards and regulations.

Overall, the Carrier 48HJ015-025 stands out as a versatile and efficient rooftop packaged unit, perfect for varying commercial applications. Its combination of advanced technology, reliability, and user-focused design makes it a prominent choice for businesses seeking optimized climate control solutions while ensuring sustainability and energy efficiency.
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