Carrier 50AH - User Manual

Copyright 2002 Carrier Corporation Form 50AH-6PD
Single Package Cooling Units
Featuring:
• compact design
• flexibility
• easy maintenance
• high quality and reliability
• quiet and efficient scroll compressor
technology
Features/Benefits
All in one package — high
cooling efficiency,
installation convenience,
ease of accessibility for time-
saving maintenance.
Space and cost saving design
Model 50AH is specifically designed to
provide the building owner with truly out-
of-sight cooling, because it installs inside
the ceiling. That’s why we call it the Car-
rier ROOMTOP® unit. The compact de-
sign and low silhouette enable it to fit
easily and securely above the conditioned
space. Single-package construction
makes it easy to install with minimal time
and cost.
Application flexibility
If desired for particular applications, the
unit can also be installed as a split system
with the condenser section mounted hor-
izontally. Centrifugal fans permit ducting
of both evaporator and condenser air.
Quiet operation
Commercial end users appreciate the ex-
tra comfort of quiet operation. Carrier
engineers met the challenge by specify-
ing heavy insulation, vibration-resistant
construction and operating components
that function at low noise levels, all of
which keep system sound at a minimum
level.
Easy maintenance
When it comes to maintenance, the
50AH rates high in accessibility. Indoor
50AH
Horizontal Indoor
Single-Package
Cooling Units
2to5NominalTons
Product
Data

Carrier 50AH Specifications

General

Model	50AH
Type	Ceiling Fan
Number of Blades	3
Air Delivery	210 CMM
Blade Span	1200 mm
Warranty	2 years

Summary

Product Features and Benefits

Key Advantages

Highlights compact design, flexibility, easy maintenance, high quality, and quiet scroll compressor technology.

Space and Cost Saving Design

Describes the 'ROOMTOP' unit's compact, low-silhouette design for easy indoor ceiling installation.

Application and Operation Features

Covers application flexibility, quiet operation with noise reduction, and easy maintenance access.

Model and Performance Data

Model Number Nomenclature

Explains the structure and meaning of the 50AH unit model number designation.

ARI Capacity Ratings

Presents cooling capacity ratings according to ARI standards for different unit sizes.

Carrier Quality and Reliability

Details factory testing, safety controls, and overall reliability of the 50AH ROOMTOP® units.

Physical Data and Dimensions

Unit Physical Data

Provides detailed physical specifications including weight, refrigerant, compressor, coil, and fan data.

Operating Weight Distribution

Shows the distribution of operating weight at each corner of the unit and overall dimensions.

Field-Installed Accessories

Control and Heating Accessories

Includes thermostats, Time Guard II circuit, and electric heater modules for enhanced control and heating.

Operational Accessories

Covers condensate pumps, head pressure control dampers, and vibration isolators for improved operation.

Base Unit Dimensions and Component Locations

Base Unit Dimensions

Provides detailed dimensional drawings and measurements for the 50AH unit.

Component Locations

Illustrates the physical layout and access points for major components within the unit.

Selection Procedure and Performance Data

Selection Procedure Example

Guides users through determining cooling requirements and selecting the appropriate unit size.

Gross Cooling Capacities

Presents tables of total and sensible cooling capacities for various operating conditions.

Performance Data (Continued)

Evaporator Fan Performance

Provides performance data for evaporator fans, including ESP and Fan kW for different CFM.

Performance Data (Continued)

Belt Drive Evaporator Fan Performance

Details performance for optional belt drive evaporator fan motors.

Condenser Fan Performance

Shows condenser fan performance data, including pulley turns and fan kW for different static pressures.

Electric Heater and Controls

Electric Heater Static Pressure Drop

Lists static pressure drops associated with electric heater modules for various airflow rates.

Controls and Operating Sequence

Explains the cooling sequence, continuous fan operation, and control features.

Electrical Data (Continued)

Electric Heater Branch Circuit Data

Details branch circuit requirements (MCA, MOCP) for electric heater modules.

Typical Wiring Schematic

Wiring Diagram Details

Illustrates the electrical connections for 230-1-60 units, including component arrangement and legend.

Typical Wiring Schematic (Continued)

Wiring Diagram Details (208;230-3-60)

Shows electrical connections for 208/230-3-60 units, including component arrangement and legend.

Application Data and Piping

Typical Piping and Wiring

Provides a diagram for typical refrigerant piping and wiring connections.

Outdoor-Air Temperature Operating Limits

Specifies the minimum and maximum outdoor temperatures for unit operation with or without head pressure control.

Field Splitting Instructions

Details instructions for splitting the unit sections and maximum refrigerant tubing lengths.

Guide Specifications - Parts 1 & 2

General System Description and Quality

Outlines system description, certifications, quality assurance, delivery, storage, and handling.

Equipment Construction and Components

Details unit cabinet, fans, compressor, coils, refrigerant components, and filter section.

Controls and Safeties

Specifies control system features, safety devices, and Time Guard II functionality.

Guide Specifications - Part 3

Operating Characteristics and Electrical

Covers operating characteristics using R-22 and electrical requirements for single point connection.

Special Features: Electric Heat & Thermostat

Details electric heat module features and the thermostat assembly with malfunction light.

Special Features: Time Guard, Condensate Pump, Head Pressure, Vibration Isolation

Describes Time Guard II delay, condensate pump, head pressure control, and vibration isolation packages.