Contents

Owners Information Manual
- A05194 A150067
- Fig. 1 50ZHC
  - Safety Considerations
  - Operating Your Unit
    - 1. During heating, increasing the desired temperature setting more than 2F (1.1C) may cause the supplemental heaters to be turned on for a short period of time to satisfy the demand. Needless use of the supplementary heat reduces potential energy...
    - 2. Ice or frost tends to form on the coil during winter heating operation. Your unit is designed to automatically melt the ice. When in this defrost cycle, it is normal for steam or fog to rise from the outdoor unit, and for water to drain from the o...
    - To start the unit:
      - 1. Turn on the electrical power supply to unit.
      - 2. Set MODE control to desired mode and select temperature.
    - To shut off unit:
      - 1. Set system MODE control to OFF.
      - 2. Turn off the electrical power supply to unit.
    - Cooling Mode
    - Heating Mode
    - Supplemental Heat
    - Defrost Mode
    - Emergency Heating Mode
  - Maintenance and Service
    - Routine Maintenance
    - Maintenance and Care for the Equipment Owner
      - 1. TURN OFF ELECTRICAL POWER TO YOUR UNIT BEFORE SERVICING OR PERFORMING MAINTENANCE AND INSTALL A LOCK-OUT TAG.
      - 2. When removing access panels or performing maintenance functions inside your unit, be aware of sharp sheet metal parts and screws. Although special care is taken to reduce sharp edges to a minimum, be extremely careful when handling parts or reachi...
    - Air Filters
    - Fans and Fan Motor
    - Indoor and Outdoor Coils
    - Condensate Drain
    - Compressor
    - Condenser Fan
    - Electrical Controls and Wiring
    - Refrigerant Circuit
    - Unit Panels
    - Regular Dealer Maintenance (Refer to Table 2)
      - 1. Inspection and, if required, cleaning of the outdoor and indoor coils.
      - 2. Inspection and, if required, cleaning of the indoor coil drain pan.
      - 3. Inspection and cleaning of blower wheel housing and motor.
      - 4. Inspection of all supply and return air ducts for leaks, obstructions, and insulation integrity. Any problems found should be resolved at this time.
      - 5. Inspection of the unit base to ensure that no cracks, gaps, etc., exist which may cause a hazardous condition.
      - 6. Inspection of the unit casing for signs of deterioration.
      - 7. Inspection of all electrical wiring and components to assure proper connection.
      - 8. Inspection for leaks in the refrigerant circuit. Pressure and temperature check to determine appropriate refrigerant charge.
      - 9. Operational check of the unit to determine working conditions. Repair or adjustment should be made at this time.
    - Warranty Certificate
    - Before you call for service...
    - In Case of Trouble
      - Table 2 Maintenance Checklist

Carrier 50ZHC Owner's Manual

Pages 6

Year 2020

Language(s)

of 6

Carrier 50ZHC Specification

The Carrier 50ZHC is a high-efficiency rooftop unit designed for commercial HVAC applications, offering advanced climate control with reliability and energy efficiency. This unit operates using a direct expansion system and is available in various capacities to accommodate different building sizes and cooling needs. The 50ZHC features a scroll compressor, which enhances efficiency and reduces noise levels, ensuring a quieter operation. Integrated with high-performance coils, the system is optimized for effective heat exchange, contributing to its overall energy efficiency.

The unit supports multiple refrigerant options, allowing flexibility in meeting environmental and regulatory requirements. Its control system is equipped with advanced diagnostics and communication capabilities, enabling easy integration with building management systems for remote monitoring and maintenance. The Carrier 50ZHC is designed with a focus on ease of installation and maintenance, featuring accessible components and a durable construction that withstands harsh weather conditions, ensuring long-term reliability.

Additionally, the unit's design incorporates environmentally friendly practices, such as the use of recyclable materials and energy-efficient technologies, aligning with modern sustainability standards. The Carrier 50ZHC is suitable for a wide range of commercial applications, including office buildings, retail spaces, and educational facilities, providing consistent and reliable climate control. Through its combination of innovative features, robust construction, and energy efficiency, the Carrier 50ZHC stands as a versatile solution for modern commercial HVAC needs.

Carrier 50ZHC F.A.Q.

What is the recommended maintenance schedule for the Carrier 50ZHC unit?

The recommended maintenance schedule for the Carrier 50ZHC includes checking the air filter monthly, inspecting the coils every six months, and having a professional service the unit annually.

How can I troubleshoot if the Carrier 50ZHC is not cooling properly?

Ensure that the thermostat settings are correct, check if the air filter is clean, verify that the condenser is not blocked, and inspect the refrigerant levels. If the issue persists, contact a professional technician.

What should I do if the Carrier 50ZHC unit is making unusual noises?

Check for any loose panels or screws, inspect the fan blades for debris, and ensure the unit is on a stable surface. If noises continue, it may indicate mechanical issues requiring professional inspection.

Can I install the Carrier 50ZHC unit myself?

While basic maintenance can be performed by the owner, installation should be done by a certified HVAC technician to ensure proper setup and warranty compliance.

How do I reset the Carrier 50ZHC unit after a power outage?

To reset the unit, turn off the thermostat, switch off the circuit breaker for the unit, wait for 30 seconds, and then turn the circuit breaker and thermostat back on.

What type of air filter should I use for the Carrier 50ZHC?

Use a high-efficiency pleated air filter that matches the size specifications found in the unit's manual. Regularly check and replace as needed to maintain airflow and efficiency.

How can I improve the energy efficiency of my Carrier 50ZHC unit?

Ensure regular maintenance, seal any leaks in ductwork, use a programmable thermostat, and consider upgrading insulation in your home.

Is there a quick way to check if the Carrier 50ZHC is running efficiently?

Listen for any unusual sounds, feel for consistent airflow, check if the unit maintains set temperatures, and monitor energy bills for any spikes.

What are the common error codes for the Carrier 50ZHC and their meanings?

Common error codes include E1 for sensor failure, E2 for high-pressure switch tripped, and E3 for low-pressure switch tripped. Refer to the manual for a comprehensive list and solutions.

How can I ensure the longevity of my Carrier 50ZHC unit?

Regular maintenance, prompt repairs, maintaining a clean environment around the unit, and ensuring proper installation all contribute to extending the lifespan of the unit.