Air coolers / Evaporators

HVS/T X00–X06

Proven cubic high-performance air cooler – now also available as a newly developed MultiRef version

Additional product lines:

(CO₂) 80 bar

(Secondary refrigerants)

Highlights

Safety: EC fan technology and defrost
system adapted for flammable refrigerants
Frost storage: aligned Roller tube
geometry with fin spacing between 4 and 12 mm
Easy installation: 1:1 replacement of
existing units thanks to identical external dimensions and suspension points
Robust design: maximum
reliability

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HVS/T MultiRef

X00-X06

The HVS/T MultiRef air cooler can also be operated with A1 refrigerants without any modifications.

This means that the evaporator can be installed in a system currently operating with an A1 refrigerant and can continue to be used when the system is converted to an A2L or A3 refrigerant in the future.

The HVS/T MultiRef meets the high safety requirements for operation with flammable refrigerants.

Innovation meets proven technology

New EC fans – energy-efficient, quiet and continuously speed‑controlled as standard.
Proven Walter Roller tube system with fin spacing up to 12 mm – maximum frost storage capacity with minimal defrost requirements
Reworked ignition source management – improved earthing system, reduced surface temperatures of heater rods, components approved for use with flammable refrigerants

MultiRef replaces the Euro-Line S and Euro-Line Plus series

Identical suspension dimensions and overall dimensions to previous models
Identical cooling capacities thanks to internally grooved tubes, increased tube quantity and large heat exchanger surfaces
Available for every application – product lines for operation with
- A1, A2L and A3 refrigerants (MultiRef)
- as well as R744 (CO2Oler)
- and secondary refrigerants (H2OCooler)

Product advantages

Your benefits with the HVS/T MultiRef

A2L / A3-compliant design

The HVS/T MultiRef meets the high safety requirements for operation with flammable refrigerants.

Optimal heater rod arrangement

For optimum heat distribution and reliable defrosting

Inserted into aluminium sheath tubes to prevent steam plumes.

EC fans as standard

For energy‑efficient operation

Certified for use with flammable refrigerants.

Optimally designed side sections

for trouble‑free connection of refrigerant pipework and easy valve installation.

Good accessibility via lateral covers, fully removable.

Corrosion protection variants

The ideal protection for every application

For the HVS/T, there is a suitable corrosion protection option for every application, ensuring many years of safe and leak‑tight operation.

Aligned tube system

For increased frost storage and fewer defrost cycles

Roller’s aligned high‑performance tube system can accommodate more frost within the coil block while maintaining a lower air‑side pressure drop.

Increase in defrost efficiency

Reduce your energy costs for defrosting

With our optimised defrost system, energy costs during defrosting can be reduced by up to 75%.

Insulated drip tray

The electric heating in the drip tray is supported by designing the tray with double walls, i.e. with an additional layer of insulation material.

1:1 replacement

Old unit out, new unit in – seamlessly within the existing system

During the development of the new Walter Roller HVS/T air cooler generation, highest priority was given to compatibility.

The units have identical dimensions and suspension points to previous HVS/T models. This means that even very old air coolers can be replaced on a 1:1 basis without any problems – with no modifications to the suspension or the installation.

This ensures a modernisation process that is fast, clean and efficient – with all the benefits of the latest Roller technology.

Accessories

Find suitable accessories for the HVS / HVST

Defrost Dome

Retains heat and further increases defrost efficiency

For reduced room load caused by defrost heat and optimised defrost performance.

Pivoting fans

For improved accessibility, enabling more thorough cleaning of the heat exchanger.

Textile hose adapter TA

For connecting textile hoses or defrost aids (Defrost Damper / Shut Up).

Textile hose adapter

with flow‑straightening honeycomb grid (TAG)

For increased air throw distance in longer cold rooms. Thermal short circuits are minimised thanks to the directed airflow.

Defrost Damper/Shut up Hält die Abtauwärme im Luftkühler

Keeps the defrost heat inside the air cooler

For pressure‑side textile shielding of the air cooler during defrosting.

Casing heater

For electrically heating the fan ring and preventing ice bridges during defrosting

Wall bracket

Made of galvanised sheet steel

White powder‑coated, static load capacity per bracket max. 20 kg.

Additional accessories

MS heating rods for coil block defrosting, tR > 0 °C – retrofittable
Defrost safety thermostat (AST) for terminating electric defrosting in the event of a malfunction in the defrost control system
Trace heating for condensate drain
Insulated drip tray to prevent condensation forming on the outer surface
Potentiometer for adjusting the air volume flow via stepless speed control of the EC fan