{"id":1139,"date":"2018-05-14T15:24:00","date_gmt":"2018-05-14T22:24:00","guid":{"rendered":"https:\/\/xlfireprotection.com\/?p=1139"},"modified":"2022-04-12T16:12:25","modified_gmt":"2022-04-12T23:12:25","slug":"historic-la-hotel-showcases-fire-protection-sustainability","status":"publish","type":"post","link":"https:\/\/xlfireprotection.com\/historic-la-hotel-showcases-fire-protection-sustainability\/","title":{"rendered":"Historic LA Hotel Showcases Fire Protection & Sustainability"},"content":{"rendered":"

Renovating a historic building in the heart of a major metropolis always will cause some heartburn for the principals.<\/p>\n

The Wilshire Grand Center and the city of Los Angeles was no exception for Brian Callahan<\/strong>, president of Santa Ana, California-based design-build firm XL Fire Protection.<\/p>\n

Callahan, in partnership with Xylem Bell & Gossett were A-C Fire Pump, worked for three years to provide the 2.1-million-square-foot Wilshire Grand Center with an enhanced, sustainable fire-protection system during the hotel\u2019s expansive $20 million makeover. Today, the 73-story glass-and-steel Wilshire Grand Center is valued at $1.35 billion and is the tallest building in the United States west of Chicago\u2019s Willis Tower.<\/p>\n

The Wilshire Grand Center<\/a> \u2014 originally known as the Hotel Statler when it opened in 1952 \u2014 selected Callahan and XL Fire Protection because of the strong working relationship Callahan\u2019s company has with Starfire, an Anaheim, California-based Xylem A-C Fire Pump distributor.<\/p>\n

\u201cStarfire worked with us to meet the requirements of the job,\u201d Callahan states. He adds that XL was responsible for the design, calculations, testing and installation of all the Wilshire\u2019s sprinkler systems.<\/p>\n

Starfire\u2019s Paul Bennett <\/strong>says the Wilshire Grand Center was no ordinary job for all parties involved in the design and installation.<\/p>\n

\u201cBecause of the staging of the pumps, it took a lot of fine-tuning of the product to meet the customer\u2019s requirements,\u201d he says. \u201cIt was an involved process, much more than typical jobs. High-rise projects in Los Angeles are far more demanding than a warehouse project. We have to spend a lot more time to make sure the pumps properly perform.\u201d<\/p>\n

Los Angeles and the state of California have strict fire-safety building codes. The facility\u2019s design was driven by NFPA 20: Standard for the Installation of Stationary Pumps for Fire Protection, according to Brian Buscher<\/strong>, global product manager \u2014 fire protection with Xylem.<\/p>\n

\u201cBecause of the requirements of the city of Los Angeles for maximum pressure, we had a lot of back and forth on pump selection,\u201d Buscher notes.<\/p>\n

Buscher states city officials would immediately fail the facility\u2019s acceptance test if one gauge read even one hair more than 600 psi as the pumps are churning.<\/p>\n

\u201cThis is a hard ceiling,\u201d he says.<\/p>\n

Callahan, Buscher and their respective teams designed a system featuring two pumps working in series. \u201c(Therefore), both pumps need to be spot-on the factory curve when operating in the field,\u201d Buscher says.<\/p>\n

He adds: \u201cThis is a tall building, so that factor alone got us close to the 300-psi limit per pump. Because it was so close, we had to hit the design point. NFPA 20 requires shutoff head to not exceed 140% of the design pressure and can\u2019t be below 65% at 150% of the rated flow.\u201d<\/p>\n

<\/a>In the details<\/p>\n

Callahan says he sketched out the Wilshire Grand Center design on a napkin and impressed decision-makers with the ability to create a system that required only one fire-pump room.<\/p>\n

\u201cBy getting the number of pumps down to six there was no need for an additional emergency generator, saving project cost,\u201d he explains. <\/p>\n

After the design was ready to go the team had to make sure it would work as planned. There is a high zone with vertical turbine pumps and a low zone with A-C Fire Pump 8200 series horizontal split-case pumps that are specified in the building. It required plenty of sizing and theoretical planning on the pump curves, especially in the high zone. Los Angeles code requirements demanded an exact set of redundant fire pumps on each level, meaning six total pumps were installed.<\/p>\n

\u201cWe had to run a lot of calculations to predict that we could meet the requirement,\u201d Buscher says. \u201cThen there was a lot of coordination between our Morton Grove, Illinois, plant where we make the split case pumps and the Lubbock, Texas, plant where we make our turbine pumps. We had to be sure that together we actually delivered the combined performance.\u201d<\/p>\n

The vertical pump and the horizontal split pump were a perfect tag team for the Wilshire Grand Center. \u201cThe vertical was a bit over psi, but the horizontal was under psi,\u201d Buscher states. \u201cSo we met the requirements.\u201d<\/p>\n

Bennett adds: \u201cOne pump services the low zone, but the high-zone portion requires two pumps in series to create the 600 psi that was required.\u201d<\/p>\n

The only specific modification made was to adjust the standard impeller trim diameter, Buscher says.<\/p>\n

\u201c(We made the change) so it was not overpressurizing the system components downstream of the pump,\u201d he notes. \u201cWe retained that information in our records in case the customer ever needs a new impeller.\u201d<\/p>\n

Additionally, Callahan used pressure-reducing valves to control the pressure throughout the fire-sprinkler system.<\/p>\n

\u201cWe were able to control the static pressure the turbine pumps generated,\u201d he says. \u201cEven at churn, the pumps were generating 77 psi, so we needed a pressure-reducing valve on the standpipe.\u201d<\/p>\n

<\/a>The innerworkings<\/p>\n

The original Wilshire Grand\u2019s HVAC system accounted for as much as 50% of the building\u2019s commercial building energy use, thus designing a new, efficient heating and cooling system was important to meeting the LEED Gold sustainability goal.<\/p>\n

The system specified Bell & Gossett pumps featuring a central plant with high-efficiency chillers and condensing boilers to supply chilled and hot water throughout the facility. Los Angeles-based ACCO Engineered Systems designed the HVAC system and John Boncich<\/strong>, the firm\u2019s senior vice president, noted they had to design obstacles to overcome.<\/p>\n

\u201cA major challenge on the project was the construction had to begin prior to the completion of the design,\u201d he says. <\/p>\n

The Wilshire Grand Center stands 1,100 feet high, anchored by a seven-level podium structure featuring retail, restaurants, meeting rooms, ballrooms and a swimming pool. On top of the podium is 400,000 square feet dedicated to office space.<\/p>\n

The podium and office levels are supplied chilled and hot water by Bell & Gossett 300-psig working pressure VSX and e-1510 pumps. The thermal energy storage system is served standard working pressure VSX pumps on the podium\u2019s second level. That thermal energy storage system charges a large water tank overnight to lower the number of chillers needed to operate the building throughout the day.<\/p>\n

Other elements of the Wilshire Grand\u2019s HVAC system include Bell & Gossett AHRI-400 certified plate-and-frame heat exchangers that isolate the facility\u2019s pressure zones from each other. Also, the HVAC system includes air separators and expansion tanks that adjust pressures in the hydronic system in response to building temperature changes.<\/p>\n

More VSX pumps are used to provide comfort to guests at the Intercontinental Los Angeles Downtown hotel, which covers floors 31-66, has nearly 900 rooms, a sky lobby on the 70th floor, and bars and restaurants on floors 69 and 71. Bell & Gossett e-90 inline pumps provide radiant floor heating and cooling in the ground-floor lobby and in the sky lobbies. <\/p>\n

Pomona, California-based manufacturers representative Dawson Co. supplied the HVAC system and vice president of commercial sales Manuel Masso<\/strong> notes how the units provided benefits beyond energy efficiency.<\/p>\n

\u201cBesides the versatility and robustness the VSX brings to a high-efficiency hydronic system, it\u2019s easily serviceable and its compact design takes up less space in the pump room,\u201d he says. \u201cDe-creasing the size of mechanical rooms means more saleable space.\u201d<\/p>\n

<\/a>Cohesive unit<\/p>\n

Despite all the elements of the Wilshire Grand Complex it covers only 2.8 acres and it did not offer extra space to store materials during or after construction. Products were lifted by cranes when needed.<\/p>\n

During testing, the fire-protection team adjusted sequencing with the pump controller and was able to close the startup gap from 10-15 seconds to seven.<\/p>\n

\u201cIn the end, everything worked as designed,\u201d Callahan declares. \u201cIt\u2019s not just putting in products; everything had to properly perform as a system and meet code.\u201d<\/p>\n

The new beacon of the Los Angeles skyline stands out for reasons beyond height and, according to Bennett, it was because of a coordinated team effort.<\/p>\n

\u201cCustomer service is so important in our industry, especially on high-profile projects such as the Wilshire Grand Center,\u201d he says. \u201cHaving those personal relationships with customers such as XL Fire Protection means they know we will do what needs to be done to meet the requirements of the job.\u201d<\/p>\n

This article was originally titled \u201c<\/em><\/strong>Fire protection grand slam\u201d in the May 2018 print edition of PM Engineer.<\/em><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Renovating a historic building in the heart of a major metropolis always will cause some heartburn for the principals.<\/p>\n","protected":false},"author":2,"featured_media":1140,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36,2],"tags":[],"yoast_head":"\nHistoric LA Hotel Showcases Fire Protection & Sustainability - XL Fire Protection<\/title>\n<meta name=\"description\" content=\"Renovating a historic building in the heart of a major metropolis always will cause some heartburn for the principals.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/xlfireprotection.com\/historic-la-hotel-showcases-fire-protection-sustainability\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Historic LA Hotel Showcases Fire Protection & Sustainability - 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