R290 inverter monobloc cooling unit for cold rooms (+2°C) and deep-freeze rooms (-18°C), up to 15 m³ / 7.5 m³ | BYGY-015-QXD-RZPP

The BYGY-015-QXD-RZPP is a wall-mounted inverter monoblock cooling unit with the natural refrigerant R290 for small refrigeration and cryogenic cooling. It is designed for both normal cold and deep cold applications and is therefore suitable for cold around +2 °C as well as low temperature applications around −18 °C - depending on the room size and actual operating conditions. With a suitable design, it can be used for cold rooms up to approx. 15 m³ at +2 °C and deep cold rooms up to approx. 7.5 m³ at −18 °C.

The system uses the natural refrigerant R290 and an integrated variable-speed compressor control to adapt the cooling capacity to the actual load. This improves temperature stability, reduces energy consumption and ensures quieter, more efficient operation in the partial load range. The control concept includes compressor frequency control, electronic expansion valve control, condenser and evaporator fan control, defrost control, pressure protection, exhaust gas temperature protection and error code output.

Since the complete cooling system is integrated in a compact housing, installation is significantly simplified. The unit is mounted directly through the cold room panel and only requires correct mounting, insulation and electrical connection.

Typical applications

• Cooling cabinets for fresh produce
• Deep-freeze cabinets for frozen products
• Catering cold storage
• Farm shop/catering outlets
• Catering catering businesses
• Small commercial walk-in cold rooms
• Laboratory cold rooms

Use as cooling and deep-freeze system: This unit is suitable for both normal cooling and deep-freeze.

Practical guide values for room temperatures & room volumes

• Cool room application: up to approx. 15 m³ at approx. +2 °C
• Deep-freeze application: up to approx. 7.5 m³ at approx. −18 °C

These values are guide values and depend on insulation, ambient temperature, product load, door openings and cooling requirements.

Correlation between evaporation temperature / room temperature

The technical specification specifies an evaporation temperature range of −40 °C to +5 °C. In practice, the evaporation temperature is below room temperature. The following orientation can be used for technical application communication:

Technical overview

Kälte performance

Practical values from the specification

At environment 32 °C (Ta), according to technical specification:

• Te = −7 °C, Tsuc = +18 °C, Ta = 32 °C: Cooling power approx. 2300 W (typical for normal cooling applications)
• Te = −25 °C, Tsuc = +5 °C, Ta = 32 °C: Cooling power approx. 1175 W (typical for low-cost applications)

These two power values are particularly suitable for categorisation in refrigeration and deep-freeze applications.

Main components and control functions

Kältesystem

• Inverter compressor
• Vaporiser
• Vaporiser
• Electronic expansion valve
• Liquid injection valve
• 4-way valve
• Filter dryer
• Sight glass
• Pressure protection components

Control and protection

The control architecture typically includes:

• Compressor frequency control
• Control of the electronic expansion valve
• Vaporiser fan control
• Vaporiser fan control
• Defrost control
• High and low pressure protection
• Exhaust gas temperature protection
• Current protection
• Output of error codes

Defrosting

The series supports heat & gas defrosting in combination with electrical heating support (please refer to the respective data sheet/bygy-015 specification for exact details). The controller offers different defrosting modes (e.g. electrical, thermal or air/wind defrosting), whereby thermal defrosting corresponds to hot gas defrosting.

Installation

The unit is intended for wall-mounted installation through the refrigeration panel.

Installation requirements

• Panel thickness of the cold room should be at least 75 mm
• Gap between unit and panel must be filled with foam/foam material
• Sufficient clearance around the plastering area must be ensured
• Mounting and cut-out in the panel must correspond to the manufacturer's installation drawing

Restriction of the intended use

This product is intended for:

• Small commercial refrigeration units
• Cooling and storage rooms for fresh produce
• Deep-freeze rooms
• Professional refrigeration applications

It is not presented as a classic household appliance, but as a commercial cold storage solution.

FAQ

Can the unit be used for both cold storage and deep-freeze rooms?

Yes. The unit is suitable for both cold and deep freeze. As a practical guide: up to 15 m³ at +2 °C and up to 7.5 m³ at −18 °C (depending on design).

Which coolant is used?

The unit uses the natural refrigerant R290.

Which refrigerant is used?

Is it an inverter unit?

Yes. The unit uses a speed-controlled compressor control (inverter).

Does the unit have an integrated controller?

Yes. The unit has an integrated controller concept with temperature control, defrost parameters, alarm and diagnostic functions (see controller manual for details).

How to install the unit

The unit is installed as a wall-mounted monobloc directly through the cold room panel. The panel thickness must be at least 75 mm and the remaining gap must be filled with insulating material.