Carrier 50XT - User Manual

1
50XT
Infinity 15t SEER Single---P ackaged Heat Pump System
with Puronr (R---410A) Refrig er ant
Single Phase
2---5 Nominal Tons (Sizes 024---060)
Product Data
A05307
Fig. 1 -- Unit 50XT
Single--Packaged Products with energy--saving features and
Puron
®
refrigerant.
S Up to 15.5 SEER
S Up to 8.0 HSPF
S Up to 12 EER at 95°F(35°C) OD
S Low Sound Levels
S Variable--Speed Blower (Standard)
S Factory--Installed TXV
S Two--stage cooling and heat pump operation
FEATURES/BENEFITS
One--piece Heat Pump unit with optional electric heater, low
installation cost, dependable performance and easy maintenance.
Efficient operation
High--efficiency design with SEERs (Seasonal Energy Efficiency
Ratio) of up to 15.5.
Puron
®
environmentally--sound refrigerant is Carrier’s unique
refrigerant designed to help protect the environment. Puron is an
HFC refrigerant which does not contain chlorine that can harm the
ozone layer. Puron refrigerant is in service in millions of systems
proving highly reliable, environmentally sound performance.
Comfort Heat Pump System with IdealHumidityt featuring
Infinityt control variable-- speed blower motor and two--stage
cooling and heating that provides greater comfort, humidity
control, and energy efficiency.
Variable--speed blower motors provide better comfort and energy
efficiency . You can expect up to 30 times better dehumidification;
economical constant airflow which provides improved indoor air
quality and more even temperatures from room to room; and
reduced indoor noise due to lower air velocity. In addition, you’ll
realize improved installation flexibility with 3 different airflow
choices for best overall comfort.
Easy installation
Factory--assembled package is a compact, fully self--contained heat
pump unit that is pre--wired, pre--piped, and pre--charged for
minimum installation expense. 50XT units are available in a
variety of standard capacity ranges. Units install easily on a rooftop
or at ground level.
Durable, dependable components
Compressors have two stages of cooling and heating and are
designed for high efficiency. Each compressor is hermetically
sealed against contamination to help promote longer life and
dependable operation. Vibration isolation provides quiet operation.
Compressors have internal high-- pressure and overcurrent
protection.
Convertible duct configuration
Unit is designed for easy use in either downflow or horizontal
applications. Each unit is easily converted from horizontal to
downflow with two duct covers (available as an accessory).
Downflow operation is easily provided in the field to allow vertical
ductwork connections. The basepan utilizes knockout style seals
on the bottom openings to ensure a positive seal in the horizontal
airflow mode.
Direct--drive, variable--speed blower motor is standard on all
50XT models.
Direct--drive, PSC condenser fan motors are designed to help
reduce energy consumption and provide for cooling operation
downto55°F (12.7°C) outdoor temperature. Low--ambient
cooling is available below 55°F (12.7°C) when low--ambient
cooling is enabled in the User Interace (UI). Motormaster
®
II
low--ambient kit is not required.
Infinityt User Interface is designed to work as a system with
Carrier’s single--packaged product.
Refrigerant system is designed to provide dependability. Liquid
refrigerant filter driers are used to promote clean, unrestricted
operation. Each unit leaves the factory with a full Puron refrigerant
charge. Refrigerant service connections make checking operating
pressures easier.
Indoor and outdoor coils are computer designed for optimum
heat transfer and cooling efficiency. The indoor coil is fabricated
from copper tube and aluminum fins and is located inside the unit

Summary

Model Number Nomenclature

ARI Capacities

Provides cooling and heating capacities and efficiencies based on ARI standards.

Physical Data

Sound Power Levels (dBA)

Presents sound power levels in dBA across different octave bands for various unit models.

Options and Accessories

Factory-Installed Options

Lists options like coil enhancements and manual air dampers available factory-installed on the unit.

Selection Procedure

Determine Cooling and Heating Requirements

Guides users on identifying unit needs based on design conditions for cooling and heating.

Performance Data

Cooling Performance Data

Provides detailed cooling performance tables across various models and operating conditions.

Typical Piping and Wiring

Roof Mounting Diagram

Illustrates typical piping and wiring for rooftop installations, including duct connections.

Application Data

Minimum Cooling Ambient Temperature

Details the unit's capability for low-ambient cooling operation.

Electrical Data

Unit Electrical Specifications

Lists voltage range, compressor, fan, and electric heat data, including FLA, MCA, and MOCP.

Typical Wiring Schematic

230-1-60 Schematic

Presents the wiring diagram for a 230V, single-phase, 60Hz electrical connection.

Controls

Sequence of Operation

Describes how the unit operates based on UI commands for cooling, heating, and fan modes.

Guide Specifications

System Description

Outlines the basic system characteristics of the rooftop heat pump unit.

Compressor Specifications

Details the type and features of the scroll compressors used in the unit.

Electric Heaters

Details the availability and specifications of optional electric heater packages.

Carrier 50XT Specifications

General

Brand	Carrier
Model	50XT
Category	Heat Pump
Language	English