Contents

SAFETY CONSIDERATIONS
model number nomenclature and dimensions
- Rated Indoor Airflow
installation
- Jobsite Survey
- Step 1 Plan for Unit Location
  - roof mount
- Step 2 Plan for Sequence of Unit Installation
  - CURB-MOUNTED installation
  - pad-mounted installation
  - frame-mounted installation
- Step 3 Inspect Unit
- Step 4 Provide Unit Support
  - Roof Curb Mount
  - Slab Mount (Horizontal Units Only)
  - Alternate Unit Support (In Lieu of Curb or Slab Mount)
- Step 5 Field Fabricate Ductwork
  - Units with Accessory Electric Heaters
- Step 6 Rig and Place Unit
- Step 7 Convert to Horizontal and Connect Ductwork (when required)
- Step 8 Install Outside Air Hood
  - economizer hood removal and setup (factory option)
  - Two-Position Damper Hood Removal and Setup (Factory option)
  - economizer and two-position hood Assembly
- Step 9 Units with Hinged Panels Only
- Step 10 Install External Condensate Trap and Line
- Step 11 Make Electrical Connections
  - field power supply
  - Units without Factory-Installed Disconnect
  - Units With Factory-Installed Disconnect
  - all units
  - Convenience Outlets
  - Factory Option Thru-Base Connections
  - units without thru-base connections (electrical connections)
  - field control wiring
  - thermostat
  - heat Anticipator Settings
  - Commercial Defrost Control
  - electric heaters
  - Control and Power wiring diagrams
- Economi$er X (Factory Option)
  - System Components
  - Specifications
  - Inputs
  - Outputs
  - Environmental
  - Economizer Module Wiring Details
  - Interface Overview
  - Setup and Configuration
  - Enthalpy Settings
  - Checkout
  - Troubleshooting
- Smoke Detectors
  - Completing Return Air Smoke Sensor Installation
  - Additional Application Data
- RTU Open Control System
- Controller Options
  - Low Ambient
- Step 12 Adjust Factory-Installed Options
  - smoke detectors
  - EconoMi$er IV Occupancy Switch
- Step 13 Install Accessories
- Step 14 Check Belt Tension
  - Belt Force Deflection Method
  - Belt Tension Method
- Pre-Start and Start-Up
- Typical Unit Piping
Start-Up Checklist for 50HCQA04-06

Carrier 50HCQ 04 06 Installation Instructions

Pages 48

Year 2019

Language(s)

of 48

Carrier 50HCQ 04 06 Specification

The Carrier 50HCQ 04 06 is a high-efficiency commercial rooftop unit designed to provide robust heating and cooling solutions for medium to large spaces. This unit is part of Carrier's WeatherMaker® series, notable for its reliability and advanced technology. It features a compact, lightweight design that facilitates easy installation and serviceability, making it an ideal choice for retrofit applications or new construction.

Powered by a high-efficiency scroll compressor, the 50HCQ 04 06 ensures optimal performance with reduced energy consumption. The unit incorporates a microprocessor-based control system that offers precise temperature management and system diagnostics to enhance operational efficiency and simplify maintenance. Its advanced evaporator and condenser coil design improves heat transfer, contributing to superior energy performance and lower operational costs.

The 50HCQ 04 06 operates quietly, equipped with sound-reducing technologies, making it suitable for settings where noise control is essential. It supports a wide range of airflow configurations, providing flexibility to meet diverse application requirements. Additionally, the unit is compatible with Carrier's sophisticated i-Vu® building automation system, allowing users to easily integrate and control HVAC operations within a comprehensive management framework.

Constructed with a durable, corrosion-resistant cabinet, the 50HCQ 04 06 is designed to withstand various environmental conditions, ensuring longevity and reliable performance. The unit also meets or exceeds ASHRAE 90.1 energy efficiency standards, aligning with modern sustainability goals.

Overall, the Carrier 50HCQ 04 06 rooftop unit combines efficiency, flexibility, and durability, making it a preferred solution for commercial HVAC needs. Its advanced features and reliable performance help businesses maintain comfortable indoor environments while minimizing energy costs.

Carrier 50HCQ 04 06 F.A.Q.

What are the basic steps to start the Carrier 50HCQ 04 06 unit?

Ensure the unit is properly connected to a power source. Set the thermostat to the desired temperature. Turn the system switch to 'cool' or 'heat' as required.

How can I troubleshoot if the Carrier 50HCQ 04 06 unit is not cooling properly?

Check the thermostat settings to ensure it is set to 'cool'. Inspect air filters for any blockages and clean or replace them if necessary. Verify that the condenser coils are clean and free of debris.

What maintenance procedures should be regularly performed on the Carrier 50HCQ 04 06 unit?

Regularly clean or replace air filters, inspect and clean condenser and evaporator coils, check refrigerant levels, and ensure all electrical connections are secure.

What should I do if the unit is making unusual noises?

Check for any loose parts or debris around the unit. Ensure that the fan blades are not obstructed. If noises persist, contact a professional technician for inspection.

How do I reset the Carrier 50HCQ 04 06 unit after a power outage?

Turn off the unit at the thermostat and switch off the circuit breaker for the unit. Wait for about 5 minutes, then turn the breaker back on and restart the unit via the thermostat.

What are the common error codes for the Carrier 50HCQ 04 06 and their meanings?

E1 indicates a sensor failure, E2 signals a communication error between components. Refer to the user manual for a comprehensive list of error codes and solutions.

How can I improve the energy efficiency of my Carrier 50HCQ 04 06 unit?

Ensure that the unit is properly maintained with clean filters and coils. Use a programmable thermostat to optimize temperature settings and seal any air leaks in your home.

What should I check if the unit is not turning on?

Verify that the unit is receiving power by checking the circuit breaker and any fuses. Examine the thermostat settings and ensure it is functioning correctly.

Can I perform maintenance on the Carrier 50HCQ 04 06 unit myself, or should I hire a professional?

Basic maintenance like cleaning or replacing filters can be done by the user. However, more technical tasks like checking refrigerant levels should be performed by a certified technician.

What is the recommended frequency for professional servicing of the Carrier 50HCQ 04 06 unit?

It is recommended to have the unit professionally serviced at least once a year to ensure optimal performance and longevity.