Contents

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Owners Information Manual
- A09033
- Fig. 1 Unit 50VG
  - 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. Lock out and tag switch with a suitable warning label.
      - 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 Indoor Air Filter Data
        
        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
    - 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 see 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 50VG Owner's Manual

Pages 6

Year 2020

Language(s)

of 6

Carrier 50VG Specification

The Carrier 50VG is a high-efficiency rooftop unit designed for commercial heating and cooling applications. It is renowned for its robust performance and energy-saving capabilities. This unit integrates advanced technologies to optimize climate control while minimizing operational costs. The 50VG series features a variety of models with different capacities, enabling it to accommodate a wide range of building sizes and requirements.

At the core of the Carrier 50VG is its high-efficiency scroll compressor, which ensures reliable operation and longevity. The unit employs environmentally responsible refrigerants, aligning with modern sustainability standards. Equipped with a sophisticated microprocessor control system, the 50VG allows for precise temperature regulation and supports easy integration with building management systems. This ensures seamless operation and enhanced monitoring capabilities.

The unit is designed with a durable construction, featuring a galvanized steel cabinet that withstands harsh environmental conditions. Its advanced coil design and high-performance fans contribute to its superior energy efficiency, reducing utility costs for building owners. The 50VG also includes options for economizers and various ventilation controls, further enhancing its efficiency by leveraging outside air for cooling when conditions allow.

Maintenance and serviceability are prioritized in its design, with easily accessible components and diagnostic features that simplify routine checks and repairs. The Carrier 50VG is suitable for a variety of commercial applications, offering flexible installation options and reliable year-round comfort. Its combination of efficiency, durability, and advanced controls make it a preferred choice for businesses seeking to optimize their HVAC systems. Overall, the Carrier 50VG stands out as a versatile and efficient solution for modern commercial climate control needs.

Carrier 50VG F.A.Q.

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

The Carrier 50VG unit should have bi-annual maintenance checks: one before the cooling season and one before the heating season. This includes cleaning coils, checking refrigerant levels, and inspecting electrical connections.

How do I troubleshoot if the Carrier 50VG is not cooling properly?

First, check if the thermostat is set correctly. Ensure filters are clean, and there are no obstructions around the unit. Inspect for any refrigerant leaks and ensure the condenser coil is clean.

What should I do if my Carrier 50VG unit is making unusual noises?

Unusual noises could indicate loose components or debris in the unit. Check for loose screws, clean the blower fan, and ensure the fan blades are not damaged. If the noise persists, contact a technician.

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

To improve energy efficiency, regularly clean or replace filters, ensure proper insulation of ducts, and use programmable thermostats to optimize temperature settings.

What is the procedure to reset the Carrier 50VG system after a power outage?

To reset the Carrier 50VG system, turn off the thermostat, switch off the circuit breaker for the unit, wait for 30 seconds, then turn the breaker and thermostat back on.

Why does the Carrier 50VG unit keep cycling on and off frequently?

Frequent cycling can be due to an oversized unit, incorrect thermostat settings, or a clogged air filter. Ensure the thermostat is correctly calibrated and replace or clean filters.

How do I clean the air filter on a Carrier 50VG unit?

To clean the air filter, turn off the unit, remove the filter from its compartment, and vacuum or wash it with water and mild detergent. Ensure it is completely dry before reinstalling.

What are the common error codes for the Carrier 50VG, and how do I resolve them?

Common error codes include E1 for sensor issues and E2 for communication errors. For E1, check sensor connections; for E2, ensure wiring is intact. Consult the manual for other codes.

How can I prevent my Carrier 50VG unit from freezing up?

Prevent freezing by maintaining proper airflow with clean filters, ensuring refrigerant levels are adequate, and keeping the evaporator coil free of dirt and debris.

What steps should I take if the Carrier 50VG unit is leaking water?

If the unit is leaking water, check for a clogged condensate drain line, inspect the condensate pan for cracks, and ensure the unit is properly leveled to allow drainage.