Air conditioning
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Braze free and a week to spare
By switching from a traditional brazing method to Conex Bänninger’s award-winning >B< MaxiPro, P&R Heating has calculated it has managed to save over a week in time on a recent project to renew Gloucester Library’s air conditioning system
P
&R Heating, a mechanical and electrical installation and service contractor based in Gloucestershire, has developed an excellent reputation for the first class service it has provided to its customers for over 30 years. The company was tasked with replacing Gloucester Library’s old air
conditioning systems, with the new system required to effectively control the levels of humidity within the important stored documents area in the library. P&R Heating took the decision to trial press-fit technology for the first time rather than brazing, which resulted in only a positive outcome for the company, which has now converted to press-fitting. P&R Heating engineer Ben Smailes, who has over 26 years’ experience in the
sector, said: “We’ve been using flame-free press jointing on plumbing and heating projects that we’ve worked on for a number of years based on its speed and ease of installation. However, this was the first time we decided to switch from braze to press on an air conditioning job. “The reason for this was simple. As a business, we are constantly looking at
ways we can raise the bar and utilise innovative solutions that will not only enable us to get the job done more efficiently, but can also save us time and money. “Press-fit technology has been around in the ACR sector for a while now, but it’s never really taken off. However, there’s been a lot of talk recently about the investment that manufacturers are making to bring more advanced press-fit solutions to the market, like Conex Bänninger’s new >B<MaxiPro solution. “I’d heard about >B< MaxiPro via Twitter and my colleague had read about it in
the trade press, so we decided now was the time to give it a try! We contacted Conex Bänninger and were directed to our nearest merchant stockist to order.” Conex Bänninger’s >B<MaxiPro is an innovative press system that is quick and simple to install, providing a secure and permanent leak-free joint. Utilising 3-point-press-technology (one press each side of the bead and one compressing the O-ring), >B< MaxiPro is designed for use in systems with operating pressures of up to 48 bar and is available in a host of fittings types, including Straight Coupler, Reducing Coupler, Fitting Reducer, 90° Bend, 90° Street Bend, 45° Obtuse Elbow, Equal Tee and Stop End variants. Ben continued: “We used approximately 100 fittings on the Gloucester Library
September 2018
project, so there were roughly 200 joints to be made. Following the initial preparation of the joint, it only takes up to five seconds to complete using a press tool. This is approximately three times faster than traditional brazing. “It’s not just the speed of jointing that saves you time though. Because it’s
flame-free, you don’t need a hot works permit on-site, which also saves valuable time and money and means it makes minimal disruptions to the commercial environment you are working in. We also saved valuable time by not having to carry out complicated risk assessments that you have to do with brazing, which can sometimes take up to two hours a day. “We therefore calculated that because we used press-fit technology, across the whole project, it has saved us days in time compared to if we were brazing. This is a massive amount of time saved for any business, enabling us to complete the project much quicker. In addition, the time we saved more than covered the investment we made in the press tool on this one job alone!” In order to ensure confidence and competence using press-fitting, engineers
from P&R Heating completed Conex Bänninger’s >B< MaxiPro certified training course prior to beginning the Gloucester Library project. The course includes a complete overview of the product and its benefits, along with providing engineers and contractors with the opportunity to use Rothenberger’s press tool and jaws for >B< MaxiPro installations, the recommended press tool for this solution. Completing the course increases the guarantee on >B< MaxiPro installations to five years against manufacturing defects. “I’d definitely use >B< MaxiPro again,” concluded Ben. “In fact, I’d never use
anything else again unless I absolutely had to. There are a whole host of benefits. Most importantly, it just makes a job so much easier and quicker.” >B< MaxiPro fittings can be used with annealed, half hard or hard copper tube
that conforms to EN 12735-1 or ASTM-B280 in air conditioning and refrigeration applications. The fittings are available from a number of merchants and wholesalers, nationally. >B< MaxiPro is also approved for use with a range of refrigerants, including R-32, R-134a, R-404A, R-407C, R-407F, R-410A, R-507, R1234ze, R1234yf, R-718, R-450A, R-513A, R-448A, R-449A, R-407A, R-427A, R- 438A, R-417A and R-422D.
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