[{"term":"Libraries_BA","id":0,"type":"QUICKLINKS"},{"term":"Instructions","id":1,"type":"QUICKLINKS"},{"term":"WAGO-I/O-PRO","id":2,"type":"QUICKLINKS"},{"term":"Building","id":3,"type":"QUICKLINKS"},{"term":"221","id":4,"type":"QUICKLINKS"}]

{ "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Homepage", "item": "https://www.wago.com/global" }, { "@type": "ListItem", "position": 2, "name": "Industry Solutions", "item": "https://www.wago.com/global/industries" }, { "@type": "ListItem", "position": 3, "name": "Building Technology", "item": "https://www.wago.com/global/building-technology" }, { "@type": "ListItem", "position": 4, "name": "Customer Application", "item": "https://www.wago.com/global/building-technology/customer-application-hvac-retrofit-christoffers" } ] }

Customer application 11 May 2022

RETROFITTING COMPLEX HVAC SOLUTIONS WITH WAGO

How do you install a new absorptions chiller, including peripherals, in a shipping container for use in an existing building? With the right partner for systems and building technology and the right automation solution. CHRISTOFFERS from Delmenhorst (Lower Saxony) and WAGO from Minden (North Rhine-Westphalia) show how. From the frequency converters, to the heat exchanger, to the connection to the building control system – all the chiller automation runs via a PFC200. In this project, the WAGO I/O System 750 once again demonstrates its suitability for both series production and custom solutions.

Some things just take a lot of time – municipal bureaucracies, for example, as many a building owner in Germany can testify. In a construction project for a northern German university site, the red tape was slowing things down too much. To retrofit an existing building with a chiller, an annex was required to accommodate the new technology. Because there was no chance that the construction permit application would be processed and approved in the foreseeable future, the project required ingenuity – as well as an innovative partner with extensive expertise.

An Overview of the Project:

The challenge: to automate the control of the chiller and the peripherals of the container and connect them to the higher-level building control system
Openness plus a modular design: The WAGO I/O System 750 was the only automation system considered
Everything under control – with the PFC200 as the central control unit
All the applications were conveniently implemented in using function blocks based on CODESYS V3.

A Creative Custom Solution from Established Experts

Instead of building a brick-and-mortar equipment room, the university’s facility managers soon decided to use a shipping container. A “mobile” solution like this is still subject to numerous regulations, but the approval process is much simpler than for a permanent structure. “In contrast to a freely designed annex, the dimensions of a standard container are fixed,” says David Gellermann. The head of the electrical engineering department at CHRISTOFFERS Anlagentechnik und Gebäudetechnik, a building services engineering firm, was in charge of accommodating the customer’s complex 318 kW absorption chiller within the steel walls of the 8 by 40 foot container.

This HVAC specialist from Delmenhorst is very familiar with this type of custom project. CHRISTOFFERS has around 130 employees who are always available when complicated problems require specialized solutions, as was the case here. The actual setup of the chiller system only took about three to four weeks, once the system layout had been worked and the automation control cabinet designed. “Because the container is transportable, we were able to finish the majority of the work on the hydraulics, the pipes and conduits and the electrical engineering at our headquarters. That meant that all we had to do on site was install the heat exchanger and complete the connection work,” says the electrical engineer, ticking off yet another benefit.