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Carrier 50TC User Manual

Carrier 50TC
98 pages
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50TC
Cooling Only/Electric Heat Packaged Rooftop
3to12.5NominalTons
Product Data
C08613
This product has been designed and manufactured to
meet Energy Star® criteria for energy efficiency.
However, proper refrigerant charge and proper air flow
are critical to achieve rated capacity and efficiency.
Installation of this product should follow all
manufacturer’s refrigerant charging and air flow
instructions. Failure to confirm proper charge an d
air flow may reduce energy efficiency and shorten
equipment life.
the environmentally sound refrigerant

Table of Contents

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Carrier 50TC Specifications

General IconGeneral
Model50TC
CategoryAir Conditioner
RefrigerantR-410A
Voltage208/230V
Compressor TypeScroll
Refrigerant TypeR-410A
Sound Level (Outdoor Unit)72 dB
Dimensions (Outdoor Unit)35 x 31 x 31 inches
Weight (Outdoor Unit)Varies by model

Summary

Product Data

Features and Benefits

Easy to install

Details field-convertible airflow, lighter units, and compatible curbs.

Easy to maintain

Highlights quick access handles, "no-strip" screw system, and pressure reading access.

Easy to use

Mentions master terminal board, low voltage connections, and standard components like filter driers.

Model Number Nomenclature

Factory Options and Accessories

Economizer (dry-bulb or enthalpy)

Explains how economizers save money and provide ventilation.

CO2 Sensor

Details how CO2 sensors improve productivity and save money via DCV.

Smoke Detectors

Explains their role in safety and factory installation options.

Louvered Hail Guards

Describes coil protection from hail and incidental contact.

Convenience Outlet (powered or un-powered)

Explains how it reduces installation costs and provides power.

Non-fused Disconnect

Describes its OSHA compliance and safety function for technicians.

Power Exhaust with Barometric Relief

Highlights superior internal building pressure control.

PremierLink™

Describes controller for performance, zoning, and digital accessories.

RTU-MP, Multi-protocol Controller

Explains connection to BAS without translators.

Time Guard II Control Circuit

Details compressor protection against short-cycling.

Filter or Fan Status Switches

Explains detection of filter clogs or fan motor failure.

Motorized 2-Position Damper

Describes admitting up to 100% outside air for ventilation.

Manual OA Damper

Offers an economical way to bring in ventilation air.

Optional Humidi-MiZer™ Adaptive Dehumidification System

Details dual dehumidification modes for improved comfort.

Motormaster Head Pressure Controller

Controls coil head pressure based on outdoor ambient temperature.

Winter Start Kit

Extends low ambient cooling limit to 25°F (-4°C).

Alternate Motors and Drives

Provides factory-installed combinations for motor and drive needs.

Thru-the-Base Connections

Ensures proper connection and seal for routing wire and piping.

Electric Heaters

Offers field-installed accessory heaters for various applications.

Curbs & Weights Dimensions – Chassis 1

Curbs & Weights Dimensions – Chassis 2

Curbs & Weights Dimensions – Chassis 3

Application Data

Min operating ambient temp (cooling)

Specifies minimum outdoor temperatures for safe operation.

Max operating ambient temp (cooling)

States the maximum outdoor temperature for reliable cooling.

Min and max airflow (cooling mode)

Details airflow limits for safe and reliable operation.

Outdoor air application strategies

Discusses economizers for reduced expenses and ventilation.

Motor limits, break horsepower (BHP)

Assures confidence in using the full BHP range for motors.

Sizing a rooftop

Advises on correct sizing to avoid oversizing issues and improve performance.

Low ambient applications

Covers cooling with economizers or accessory low ambient controls.

Winter start

Explains the winter start kit's function for low ambient limits.

Selection Procedure

Economizer, Barometric Relief, and Power Exhaust Performance

Electrical Information

3 TONS

Provides electrical data for 3-ton models.

4 TONS

Provides electrical data for 4-ton models.

5 TONS

Provides electrical data for 5-ton models.

6 TONS

Provides electrical data for 6-ton models.

7.5 TONS

Provides electrical data for 7.5-ton models.

7.5 TONS

Provides electrical data for 7.5-ton 2-stage models.

8.5 TONS

Provides electrical data for 8.5-ton models.

10 TONS

Provides electrical data for 10-ton models.

10 TONS

Provides electrical data for 10-ton 2-stage models.

12.5 TONS

Provides electrical data for 12.5-ton 2-stage models.

MCA/MOCP Determination (No C.O. or Unpwr'd C.O.)

3 TON

Details MCA/MOCP for 3-ton models without convenience outlets.

4 TON

Details MCA/MOCP for 4-ton models without convenience outlets.

6 TON

Details MCA/MOCP for 6-ton models without convenience outlets.

7.5 TON

Details MCA/MOCP for 7.5-ton models without convenience outlets.

8.5 TON

Details MCA/MOCP for 8.5-ton models without convenience outlets.

10 TON

Details MCA/MOCP for 10-ton models without convenience outlets.

12.5 TON

Details MCA/MOCP for 12.5-ton models without convenience outlets.

MCA/MOCP Determination (W/ PWRD C.O.)

3 TON

Details MCA/MOCP for 3-ton models with convenience outlets.

4 TON

Details MCA/MOCP for 4-ton models with convenience outlets.

6 TON

Details MCA/MOCP for 6-ton models with convenience outlets.

7.5 TON

Details MCA/MOCP for 7.5-ton models with convenience outlets.

8.5 TON

Details MCA/MOCP for 8.5-ton models with convenience outlets.

10 TON

Details MCA/MOCP for 10-ton models with convenience outlets.

12.5 TON

Details MCA/MOCP for 12.5-ton models with convenience outlets.

Sequence of Operation

General

Describes the basic sequence of operation for the unit.

Electro-mechanical units with no economizer

Details operation for cooling and heating without economizer.

Electro-mechanical units with an economizer

Explains cooling and heating operation with economizer.

Optional Humidi-MiZer Dehumidification System

Describes improved dehumidification modes.

Guide Specifications

Schedules for Decentralized HVAC Equipment

Outlines schedules for HVAC equipment.

HVAC Equipment Insulation

Details insulation requirements for unit compartments.

Instrumentation and Control Devices for HVAC

Covers sensors, transmitters, and thermostats for HVAC control.

Direct-digital Control system for HVAC

Specifies requirements for DDC systems and controllers.

Sequence of Operations for HVAC Controls

Panel Air Filters

Specifies requirements for standard 2-inch fiberglass filters.

Self-Contained Air Conditioners

General requirements for self-contained AC units.

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