Hussmann Pre-Charged Refrigeration System BL4VA15UGDR

Warning: Risk of Electrical Shock! Carefully follow electrical installation instructions and electrical safety recommendations to avoid risk of electrical shock during installation, use or maintenance.

Warning: Risk of Fire and Explosion! Do not use a vacuum cleaner to clean the product. It has a motor with brushes that generate sparks during normal operation and may form an unsafe condition if there is a flammable mixture.

Warning: Risk of Leakage! Do not use mechanical devices or other means to accelerate the defrosting process, other than those recommended by the manufacturer. Do not damage the refrigerant circuit.

Is the equipment visually clean?

Is the unit turned off and disconnected from the power supply?

Open the bottom side of the evaporators (by the articulated rods), disconnect the electrical plug, and remove the fans and connecting board.

Was the above step completed successfully?

Avoid dust accumulation. Do not apply solvents, soaps, alcohols, or chemicals that may react with the components of the refrigeration system.

Is the equipment free of dust and chemicals?

Technicians must be properly qualified to conduct maintenance in refrigeration systems with flammable refrigerants.

Strictly follow the work instructions:

Maintain a periodic cleaning program for the equipment.

Perform a detailed inspection to identify potential refrigerant leaks.

Determine a specific location to work with the cooling system that is suitable to handle flammable refrigerant equipment.

Monitor the working area using a Hydrocarbon Detector (HC) located at a low level.

When replacing or servicing electrical components, ensure that all components comply with IEC / UL 60079-15.

Component parts are replaced with like components with servicing done by trained authorized service personnel.

Expansion valves are assembled in the upper side of the machine and require special attention.

The drain pan contains drain pan heaters, evaporator fan motors, temperature sensor, and a terminal strip for wiring. The drain pan can be lowered for easy service of these components. The drain pan stays connected to the unit by means of support rods.

Remove fasteners holding fan grille.

Carefully remove temperature sensor and feed through grille. Note location/orientation of sensor prior to removal.

Remove fasteners holding drain pan. Fasteners require 10mm socket. Remove four outer fasteners first and middle two fasteners last.

Sign off on the drain pan service