Carrier 48HJD012 User Manual

Copyright 1999 Carrier Corporation Form 48HJ-11PD
Carrier has designed the Weather-
master series based on customer
needs and requests to be the most
efficient and reliable rooftop unit ever
made.
Features/Benefits
• Most efficient rooftop line for
cooling using scroll compressor
technology
• Most efficient rooftop line for
heating using dimpled heat
exchangers on all units
• High reliability — non-corrosive
condensate pans, prepainted
cabinets and primed interior
panels, and all units are fully
protected by internal safeties
• Quietest operation — all
compressors mounted on
independent vibration isolators.
Standard, belt-driven evaporator
fan motors on all units
• Ease of maintenance achieved by
self diagnostics on the Integrated
Gas Controller (IGC), optional
direct digital controls, standard
size filters, tool-less filter access,
simple compressor access,
permanently lubricated fan
motors, optional disconnect
switch, optional 115-v
convenience outlet, and optional
hinged access panels
• Exclusive MoistureMiser
dehumidification package — a
result of recent advances by
Carrier in controlling comfort
levels. This factory-installed
option significantly improves the
dehumidification capability of the
rooftop unit and helps control
humidity levels in the building.
48HJD/HJE/HJF
Single-Package Rooftop Units
High-Efficiency Electric Cooling/
Gas Heating
3 to 12
1
/
2
Nominal Tons
Product
Data
48HJ004-007
48HJ008-014

Carrier 48HJD012 Specifications

General

Brand	Carrier
Model	48HJD012
Category	Heat Pump
Language	English

Summary

Product Data

Features/Benefits

Lists key advantages and features of the rooftop units, including efficiency, reliability, and ease of maintenance.

Carrier means Top Quality and Reliability

Features/Benefits (cont)

Easy Maintenance and Installation

Quiet, Efficient, and Dependable Performance

Discusses scroll compressors, fan motors, coil technology, and overall unit performance.

Model Number Nomenclature

Explains the structure and meaning of the model numbers for unit identification.

Refrigerant Circuit Protection

Serviceability Features

Integrated Gas Unit Controller (IGC)

ARI* Capacities

Cooling Capacities and Efficiencies

Details cooling capacities, SEER, EER, IPLV, and heating efficiencies by model.

Physical Data

Unit Dimensions and Weights

Physical Data (cont)

Options and Accessories

Available Unit Options

Lists available factory-installed options and field-installed accessories for customization.

Options and Accessories (cont)

Base Unit Dimensions — 48HJ004-007

Base Unit Dimensions - 48HJ008-014

Dimensional Data and Connection Sizes

Selection Procedure (with 48HJ006 Example)

Determine Cooling and Heating Loads

Guides through determining unit loads based on design conditions.

Determine Fan Speed and Power

Select Energy$Recycler

Determine Cooling Load Requirement

Calculates the required rooftop cooling load.

Select Rooftop Unit

Selects the unit based on mixed air conditions and cooling load.

Selection Procedure (cont)

Select Net Heating Capacity

Determines the required net heating capacity for the unit.

Determine Operating Watts

Determine Net Cooling Capacity

Calculates the net cooling capacity, accounting for fan heat.

Electrical Data (RLA, FLA, MCA, MOCP)

Details electrical data including RLA, FLA, MCA, and MOCP for unit power.

Performance Data

Cooling Capacities (3 Tons)

Provides cooling capacities for 3-ton units at various conditions.

Performance Data (cont)

Cooling Capacities (5 Tons)

Provides cooling capacities for 5-ton units at various conditions.

Cooling Capacities (7.5 & 8.5 Tons)

Provides cooling capacities for 7.5 and 8.5-ton units at various conditions.

Cooling Capacities (10 & 12.5 Tons)

Provides cooling capacities for 10 and 12.5-ton units at various conditions.

Cooling Capacities with MoistureMiser (3 Tons)

Cooling capacities for 3-ton units with MoistureMiser option.

Cooling Capacities with MoistureMiser (5 Tons)

Cooling capacities for 5-ton units with MoistureMiser option.

Cooling Capacities with MoistureMiser (6 Tons)

Cooling capacities for 6-ton units with MoistureMiser option.

Cooling Capacities with MoistureMiser (7.5 & 8.5 Tons)

Cooling capacities for 7.5 and 8.5-ton units with MoistureMiser.

Performance Data (cont)

Fan Performance (Vertical Discharge, Standard Motor)

Fan Performance (Vertical Discharge, Standard/High-Static Motor)

Fan Performance (Vertical Discharge, High-Static Motor)

Fan Performance (Horizontal Discharge, Standard Motor)

Fan Performance (Horizontal Discharge, High-Static Motor)

Evaporator-Fan Motor Data - Standard Motor

Standard Motor Electrical Specifications

Evaporator-Fan Motor Data - High-Static Motors

High-Static Motor Electrical Specifications

Electrical Data

Standard Motor Units (Without Convenience Outlet)

Electrical data for standard motor units without convenience outlet.

Electrical Data (cont)

Standard Motor Units (With Convenience Outlet)

Electrical data for standard motor units with convenience outlet.

High-Static Motor Units (Without Convenience Outlet)

Electrical data for high-static motor units without convenience outlet.

High-Static Motor Units (With Convenience Outlet)

Electrical data for high-static motor units with convenience outlet.

Typical Piping and Wiring

Refrigerant Piping (MoistureMiser Units)

Typical Piping and Wiring (cont)

Vertical and Horizontal Discharge Connections

Controls

Cooling Operation (48HJ004-007 Units without Economizer)

Explains cooling sequence for units without economizers.

Cooling Operation (48HJ004-007 Units with Durablade Economizer)

Cooling Operation (48HJ004-007 Units with EconoMi$er)

Heating Operation (48HJ004-007 Units without Economizer)

Describes heating sequence for units without economizers.

Controls (cont)

Heating Operation (48HJ004-007 Units with Economizer/Two-Position Damper)

Explains heating sequence with economizer/two-position damper.

MoistureMiser Dehumidification Package Operation

Explains operation of the MoistureMiser dehumidification package.

Operating Sequence for 48HJ008-014 Units

Heating Operation (48HJ008-014 Units without Economizer)

Heating Operation (48HJ008-014 Units with Economizer/Two-Position Damper)

Controls (cont)

Typical MoistureMiser Dehumidification Package Humidistat Wiring

Humidistat Wiring Diagram

Apollo Thermostat Wiring 48HJ004-007

Apollo Thermostat Wiring 48HJ008-014

Apollo Thermostat Wiring Diagram

Typical Wiring Schematic (008-014, 460-3-60 Shown)

Electrical Wiring Diagram

Legend for Typical Wiring Schematic

Wiring Diagram Symbols and Abbreviations

Notes for Typical Wiring Schematic

Wiring Installation Notes

Guide Specifications

Part 1 - General

1.02 Quality Assurance

Part 2 - Products

Guide Specifications (cont)

F. Heating Section

3. Integrated Economizers

20. MoistureMiser Dehumidification Package

G. Refrigerant Components

H. Filter Section

I. Controls and Safeties

Details unit controls and safety features.

M. Special Features