Contents

Owners Information Manual
- A170030
- Fig. 1 Unit 50VL
  - Safety Considerations
    - Starting or Shutting Unit Off
      - 1. Turn on the electrical power supply to unit.
      - 2. Select temperature and set MODE control to desired mode.
      - 1. Set system MODE control to OFF.
      - 2. Turn off the electrical power supply to unit.
  - Operating Your Unit
    - Cooling Mode
    - Heating Mode (if installed with optional electric heat)
  - 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.
      - 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
      - Table 1 Replacement Filter Sizes
        
        1. Remove the filter access panel using a 5/16-in. nut driver.
        
        2. Remove the filter(s) by pulling it out of the unit. If the filter(s) is dirty, clean or replace with a new one.
        
        3. Reinstall filter access panel ensuring opening is air and water tight.
      - Fig. 2 Unit Access Panel
      - Fig. 3 Small Chassis Filter Access
      - Fig. 4 Large Chassis Filter Access
    - Replacing or inspecting filters in units with economizers
      - 1. Remove return air duct cover at rear of unit using a 5/16-in. nut driver.
      - 2. Remove the filter(s) by pulling it out and through the unit duct opening. If filter is dirty, replace both filters with new ones.
      - 3. Reinstall duct cover ensuring opening is air and water tight.
      - 1. Remove filter access door using a 5/16-in. nut driver.
      - 2. Remove the filter(s) by pulling it out and through the unit filter access door. If filter is dirty, replace both filters with new ones.
      - 3. Reinstall filter access door ensuring opening is air and watertight.
    - Fans and Fan Motors
    - Indoor and Outdoor Coils
    - Condensate Drain
    - Compressor
    - Condenser Fan
    - Electrical Controls and Wiring
    - Refrigerant Circuit
    - Unit Panels
    - Regular Dealer Maintenance (Also 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-air 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 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 50VL Owner's Manual

Pages 6

Year 2020

Language(s)

of 6

Carrier 50VL Specification

The Carrier 50VL is a high-efficiency packaged rooftop unit designed for commercial applications, offering a streamlined solution for heating, ventilation, and air conditioning (HVAC) needs. It integrates advanced technology to provide optimal energy efficiency and reliable performance in various weather conditions. This unit comes equipped with a high-performance scroll compressor that enhances reliability and minimizes noise levels, ensuring a quiet operation. The Carrier 50VL is engineered with a variable-speed ECM fan motor, which allows for precise airflow control, improving indoor air comfort and system efficiency.

The unit's microprocessor control system offers intuitive diagnostics and easy system management, providing users with real-time monitoring capabilities and simplifying maintenance procedures. Its robust cabinet design is constructed from galvanized steel with a powder-coated finish, ensuring durability and resistance to environmental elements. The 50VL's design facilitates straightforward installation and serviceability, featuring easily accessible components and a compact footprint that fits a variety of rooftop configurations.

Energy efficiency is further optimized through the use of high-efficiency coil designs and advanced refrigerant management, achieving compliance with or exceeding current energy standards. The system supports optional economizer functions to utilize outdoor air for free cooling when conditions permit, reducing operational costs. With a focus on sustainability and environmental responsibility, the Carrier 50VL is designed to use R-410A refrigerant, which has no ozone depletion potential. This unit is ideally suited for commercial buildings seeking an efficient, reliable, and environmentally friendly HVAC solution, combining cutting-edge technology with Carrier’s renowned engineering quality.

Carrier 50VL F.A.Q.

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

To reset the Carrier 50VL unit after a power outage, turn off the unit using the main power switch. Wait for about 5 minutes before turning it back on. This allows the system to recalibrate and resume normal operation.

What is the recommended maintenance schedule for the Carrier 50VL?

It is recommended to perform maintenance on the Carrier 50VL semi-annually. This includes cleaning or replacing the air filters, checking the refrigerant levels, inspecting electrical connections, and ensuring the condensate drain is clear.

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

If the Carrier 50VL is not cooling properly, check the thermostat settings, ensure the air filters are clean, and verify that the outdoor unit is not obstructed. If the issue persists, consult a professional technician to inspect the refrigerant levels and compressor.

What type of air filter should I use with the Carrier 50VL?

The Carrier 50VL typically uses a standard 1-inch pleated air filter. However, always refer to the user manual for specific filter size and type recommendations to ensure optimal performance.

How do I clean the air filters on the Carrier 50VL unit?

To clean the air filters on the Carrier 50VL, first turn off the unit. Remove the filters and gently vacuum them or rinse under lukewarm water. Allow them to dry completely before reinstalling. Ensure the filters are securely placed back in the unit.

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

If the Carrier 50VL is making unusual noises, check for loose panels or debris around the unit. Ensure that the fan blades are not obstructed. If the noise persists, contact a qualified technician to inspect the motor and other internal components.

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

To improve the energy efficiency of your Carrier 50VL unit, regularly clean or replace the air filters, ensure the unit is properly insulated, and use a programmable thermostat to optimize temperature settings. Additionally, schedule regular maintenance checks.

How do I check the refrigerant level in the Carrier 50VL?

Checking the refrigerant level in the Carrier 50VL should be performed by a licensed HVAC technician. They will use specialized equipment to ensure the refrigerant levels are within the manufacturer's specifications.

What are the signs that the Carrier 50VL needs professional servicing?

Signs that the Carrier 50VL needs professional servicing include reduced cooling efficiency, frequent cycling, unusual noises, and water leaks around the unit. If you notice any of these issues, contact a qualified technician for an inspection.

How can I prevent my Carrier 50VL from freezing up?

To prevent the Carrier 50VL from freezing up, ensure that the air filters are clean, the airflow is not restricted, and the refrigerant levels are adequate. Regular maintenance and inspections can help prevent freezing issues.