Carrier 48HJE009 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 48HJE009 Specifications

General

Brand	Carrier
Model	48HJE009
Category	Heat Pump
Language	English

Summary

Product Data

Features/Benefits

Overview of key advantages and performance characteristics of the rooftop units.

Features/Benefits (cont)

Easy maintenance and installation

Information on simplifying unit installation, maintenance, and accessibility of components.

Another optional IAQ feature for the Weathermaster® unit is the exclusive MoistureMiser dehumidification package.

Details on the MoistureMiser package that enhances dehumidification capacity.

Serviceability

Highlights of design features that facilitate unit service and maintenance accessibility.

Features/Benefits (cont)

Quiet, efficient operation and dependable performance

Discusses features contributing to quiet operation, efficiency, and overall unit reliability.

Indoor-air quality (IAQ)

Details on features that enhance indoor air quality, such as condensate management.

Model number nomenclature

ARI* capacities

HEATING CAPACITIES AND EFFICIENCIES

Physical data

Options and accessories

Options and accessories (cont)

ECONOMISER

Options and accessories (cont)

Base unit dimensions — 48HJ004-007

Base unit dimensions — 48HJ008-014

Accessory dimensions — 48HJ004-007

Accessory dimensions — 48HJ008-014

Selection procedure (with 48HJ006 example)

I Determine cooling and heating loads at design conditions.

Step 1: Identify cooling and heating load requirements based on design conditions.

II Determine fan speed and power requirements at design conditions.

Step 2: Calculate required fan speed and power based on unit conditions.

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

Step 6: Choose the rooftop unit by matching mixed air conditions to cooling load data.

Selection procedure (with 48HJ006 example) (cont)

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

Step 7: Verify the unit's net heating capacity meets design requirements.

VIII Determine net cooling capacity.

Step 8: Calculate the unit's net cooling capacity considering all factors.

IX Determine the operating watts of the unit.

Step 9: Calculate the total operating electrical watts for the unit.

Performance data (cont)

EVAPORATOR-FAN MOTOR DATA - STANDARD MOTOR

EVAPORATOR-FAN MOTOR DATA - HIGH-STATIC MOTOR

Electrical data

Electrical data (cont)

Typical piping and wiring

UNITS WITH MOISTUREMISER OPTION

Typical piping and wiring (cont)

Controls

Operating sequence for 48HJ004-007 units

Detailed operating sequences for cooling modes on 48HJ004-007 units.

Cooling, units without economizer

Explains the cooling operation sequence when no economizer is present.

Controls (cont)

Cooling, units with Durablade economizer

Continuation of cooling operation for Durablade economizer units.

Cooling, units with EconoMi$er

Continuation of cooling operation for EconoMi$er equipped units.

Controls (cont)

Heating, units without economizer

Describes heating operation sequence for units without an economizer.

Heating, units with economizer/two-position damper

Continuation of heating operation for economizer/two-position damper units.

Operating sequence Units with Moisture Miser dehumidification package

Explains the operation sequence for units with the Moisture Miser dehumidification package.

Controls (cont)

Typical moisture Miser dehumidification package humidistat wiring

APOLLO THERMOSTAT WIRING

Controls (cont)

APOLLO THERMOSTAT WIRING

Application data

MoistureMiser dehumidifation package

Explanation of the MoistureMiser package for enhanced dehumidification.

Indoor Air Quality

Application data (cont)

Refrigerant Cycle Using MoistureMiser Dehumidification Package

Analysis of the refrigerant cycle with the MoistureMiser package for increased latent capacity.

Latent Capacity Effects

Explanation of how latent capacity decreases with sensible heat factor changes.

Dehumidification Effects

Evidence of dehumidification shown by pounds of water per pound of dry air.

Application data (cont)

PRESSURE ENTHALPY CURVE

Graphical representation of the refrigerant cycle points for design effects.

PSYCHROMETRIC CHART

Typical wiring schematic

Guide specifications

Part 1 - General

1.01 SYSTEM DESCRIPTION

Overview of the system's electrically controlled heating and cooling capabilities.

1.02 QUALITY ASSURANCE

Standards and certifications ensuring unit quality, safety, and performance.

Guide specifications (cont)

F. Heating Section:

20. MoistureMiser Dehumidification Package:

Factory-installed package for increased dehumidification by subcooling refrigerant.

I. Controls and Safeties:

Description of unit controls, safeties, and compressor protection features.

J. Operating Characteristics:

27. Energy$Recycler:

Guide specifications (cont)

3. Integrated Economizers:

Requirements for integrated modulating economizers for simultaneous operation.