Carrier 48HJE005 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 48HJE005 Specifications

General

Brand	Carrier
Model	48HJE005
Category	Heat Pump
Language	English

Summary

ARI* capacities

HEATING CAPACITIES AND EFFICIENCIES

Presents detailed cooling and heating performance ratings and efficiency metrics for various unit models.

Physical data

Options and accessories

Selection procedure

Determine cooling and heating loads at design conditions.

Outlines the initial steps to identify the required cooling and heating capacities based on building conditions.

Determine fan speed and power requirements at design conditions.

Describes how to calculate fan speed and power needs using performance tables and static pressure.

Determine the cooling load requirement for the rooftop unit.

Details how to calculate the net cooling load by accounting for Energy$Recycler capacity.

Select the rooftop unit based on mixed air entering conditions and cooling load.

Provides guidance on selecting the appropriate unit based on calculated performance parameters.

Selection procedure (cont)

Select net heating capacity of unit to meet design condition requirements.

Determine net cooling capacity.

Performance data

FAN PERFORMANCE — VERTICAL DISCHARGE UNITS

FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS

FAN RPM AT MOTOR PULLEY SETTING

Electrical data

Typical piping and wiring

Typical piping and wiring (cont)

Controls

Controls (cont)

Heating, units without economizer

Heating, units with economizer/two-position damper

Operating sequence for 48HJ008-014 units

Outlines the operating sequences for larger 48HJ units, covering cooling and heating modes.

Cooling, units without economizer

Operating sequence Units with Moisture Miser dehumidification package

Details the operation sequence for units equipped with the MoistureMiser dehumidification package.

Cooling, units with Durablade economizer

Cooling, units with EconoMi$er

TYPICAL MOISTUREMISER DEHUMIDIFICATION PACKAGE HUMIDISTAT WIRING

TYPICAL TEMP SYSTEM

APOLLO THERMOSTAT WIRING

PRESSURE ENTHALPY CURVE

PSYCHROMETRIC CHART

Typical wiring schematic

LEGEND FOR TYPICAL WIRING SCHEMATIC

Guide specifications

Guide specifications (cont)