Six new J & E Hall commercial condensing units are playing a key role at a busy hospital. The installation of the units to provide cooling for operating theatres at Warrington Hospital in Cheshire highlighted the versatility and the energy efficiency capabilities of the J & E Hall technology.
Mark Gledhill, managing director of Huddersfield-based Crowther and Shaw, which carried out the installation, said it was decided to replace the six existing outdoor units mounted on the hospital building roof with CCUs from the J & E Hall Fusion Scroll range.
The JEHS-1000-B4-M3 units supplied by Thermofrost Cryo were chosen because of their compatibility with the air handling units inside the building. Fusion and Fusion Scroll commercial refrigeration units are the ideal solution for commercial refrigeration sectors where noise, size and reliability are paramount.
Compatibility was a key issue in the Warrington Hospital installation. "The hospital wanted us to try and retain the cooling coils within the existing air handling units. In order to do so we had to find a system that would operate on a similar refrigerant to the original R407c," said Mark. "We ended up going for the J & E Hall units operating on R449a. R449a and R407c are very similar as far as cooling capacity and operating pressures go. That allowed us to change the outside units, recalibrate the expansion valves and set the system to work with the new outdoor units.
A crane was brought in to remove the old units from the roof and place the new in position. "The interconnected refrigeration pipework needed modifying to the new units as the connections were in a different place. We modified the electrical supply and generally tidied up and reinsulated the pipework outside,” Mark added.
"We spent a week on site overall and it went pretty smoothly. By using J & E Hall units we were able to retain the internal air handling units in their original condition. Had we used alternative equipment we would have had to change the indoor air handling coils because of the gas pressures.
“We install a lot of J & E Hall units and have done so for a number of years. We find them to be reliable, energy-efficient and easy to work on.”