Carrier 48HJD008 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 48HJD008 Specifications

General

Brand	Carrier
Model	48HJD008
Category	Heat Pump
Language	English

Summary

Product Data

48HJD/HJE/HJF Single-Package Rooftop Units

Features/Benefits

Lists the advantages and key selling points of the rooftop units.

Unit Features and Installation

Easy maintenance and installation

Details features that simplify unit maintenance and installation processes.

Unit Performance and Protection

Quiet, efficient operation and dependable performance

Describes the unit's low sound levels, efficiency, and reliable operation.

Integrated gas unit controller (IGC)

Explains the features and benefits of the Integrated Gas Controller (IGC).

Optional Features and IAQ Solutions

MoistureMiser dehumidification package

Introduces the MoistureMiser package for enhanced dehumidification.

Energy$Recycler — the IAQ solution

Serviceability

Highlights features that make servicing the rooftop unit easier.

Unit Features and Identification

Model number nomenclature

Explains the breakdown and meaning of the model number designations.

Performance Data: Capacities and Efficiencies

ARI* capacities

Presents cooling capacities and efficiency ratings according to ARI standards.

HEATING CAPACITIES AND EFFICIENCIES

Details heating capacities and efficiency ratings for various models.

Physical Data: Components and Dimensions

Physical data

Provides detailed physical dimensions, weights, and component specifications for units.

Options and Accessories

Economizer and Control Options

APOLLO DIRECT DIGITAL CONTROLS

Describes Apollo controls for monitoring unit operation.

MoistureMiser Package and Service Options

MOISTUREMISER DEHUMIDIFICATION PACKAGE

Details the MoistureMiser package and its operation.

Base Unit Dimensions: 48HJ004-007

Base Unit Dimensions: 48HJ008-014

Base unit dimensions

Provides detailed physical dimensions and connection sizes for specific models.

Selection Procedure Example

Determine cooling and heating loads

Determine fan speed and power requirements

Select rooftop unit based on mixed air conditions

Selection Procedure: Net Capacity Calculations

Select net heating capacity

Determine net cooling capacity

Cooling Performance Data: 3-Ton and 4-Ton Units

Cooling Performance Data: 5-Ton and 6-Ton Units

Cooling Performance Data: 7.5-Ton and 8.5-Ton Units

Cooling Performance Data: 10-Ton and 12.5-Ton Units

Cooling capacities and efficiencies

Details cooling capacities and efficiencies for 10-ton and 12.5-ton models.

Cooling Performance Data: Units with MoistureMiser Option (3-Ton & 4-Ton)

Cooling Performance Data: Units with MoistureMiser Option (5-Ton & 6-Ton)

Cooling Performance Data: Units with MoistureMiser Option (7.5-Ton & 8.5-Ton)

Cooling Performance Data: Units with MoistureMiser Option (10-Ton & 12.5-Ton)

Cooling capacities with MoistureMiser

Details cooling capacities for 10-ton and 12.5-ton units with MoistureMiser option.

Fan Performance: Vertical Discharge Units

Fan Performance: Vertical Discharge Units (cont)

Fan Performance: Horizontal Discharge Units

Fan Performance: Horizontal Discharge Units (cont)

Fan performance data

Details fan performance for 10-ton and 12.5-ton standard motor horizontal discharge units.

Motor Data and Settings

High-Static Motor RPM Settings

Evaporator-Fan Motor Data: Standard Motor

Lists specifications for standard evaporator-fan motors, including BHP and voltage.

Motor Data and Unit Sound

Evaporator-Fan Motor Data: High-Static Motors

Electrical Data: Standard Motor Units

Electrical Data: Standard Motor Units with Outlet

Electrical Data: High-Static Motor Units Without Outlet

Electrical data without convenience outlet

Presents electrical data for high-static motor units without a convenience outlet.

Electrical Data: High-Static Motor Units With Outlet

Electrical data with convenience outlet

Details electrical data for high-static motor units with a convenience outlet.

Typical Piping and Wiring Diagrams

Refrigerant piping and wiring (MoistureMiser)

Shows the typical refrigerant piping and wiring for units with the MoistureMiser option.

Typical Piping and Wiring Diagrams (cont)

Vertical and Horizontal Discharge Wiring

Illustrates typical vertical and horizontal discharge unit wiring.

Controls: Operating Sequences

Cooling sequence for 48HJ004-007 units

Cooling operation with Durablade economizer

Heating operation without economizer

Controls: Operating Sequences (cont)

Heating operation with economizer/two-position damper

Cooling sequence for 48HJ008-014 units

Cooling operation with EconoMi$er

Controls: MoistureMiser Operation

Operating sequence for MoistureMiser package

Explains the operation sequence for units with the MoistureMiser dehumidification package.

MoistureMiser Humidistat Wiring

Typical humidistat wiring diagram

Apollo Thermostat Wiring

Apollo Thermostat and Sensor Wiring

Apollo thermostat wiring diagram

Application Data: Unit Installation and Environment

MoistureMiser dehumidification package benefits

Details the MoistureMiser package and its benefits for humidity control.

Indoor Air Quality considerations

Application Data: Humidity Effects and Package Operation

Refrigerant cycle effects of MoistureMiser

Explains the refrigerant cycle effects of the MoistureMiser package.

Latent Capacity and Dehumidification Effects

Illustrates latent capacity improvements and moisture reduction with the package.

Typical Wiring Schematic

Wiring schematic for 008-014, 460-3-60 units

Shows the typical wiring schematic for specific models and voltage.

Wiring Schematic Legend and Notes

Legend for wiring schematic

Guide Specifications: General and Product Details

Guide Specifications: Heating, Controls, and Motors

Controls and Safeties specifications

Special Features specifications

Guide Specifications: Economizers and Options

Guide Specifications: Various Options and Kits

MoistureMiser Dehumidification Package

Explains the MoistureMiser package and its benefits.

Energy$Recycler unit