Document NmdqaRZbJEaG0pEo67Nnzypg

Skillful Planning Licks Problems Of Air-Conditioning Installation I xi i;: Refrigerating compressor located In the bosemcnt chills the circulating water, which is pumped for distribution to the ottlc space obove the thirteenth floor Fitting equipment into this occupied structure meant more than (ust connecting the vari ous ports. The job had to be done with a minimum of noise, and the engineers hod to eome up with the answer to, "Where do we put the cooling tower?" A YSAR-nourto air-conditioning sys tem, which services 400 guest rooms of the Ansley Hotel. Ailonta, Ca., pre sented unusual installation problems associated with structural work on an occupied building. The job was complicated because the main structure was built in 1913 and an annex added in 1923. Also, work had to be planned for minimum inter ference with business, ss a hotel cannot completely close its doors. Cooling Tower. Location of the cool ing tower was a problem. Physical changes to the building after erection prevented placing the heavy tower on the tool. Answer was to erect a struc tural-steel framework on rock founda tion al subbasement level and build it high enough to clear the elevator pent house. This amounted to a one-room lS-etory "skyscraper." Refrigerating equipment was bulky and os the machine room was two floors below street level, special provision had to be made for lowering the ma chinery into plaee. Space was not avail able (o bring it into the building at street level and lower it down the stairs, so the only alternative was to dig a pit through the sidewalk to subbasement level. The pit was 20 ft long, 25 ft deep and S (t wide. Additional width would have made the rigging job much easier, but a district steam main, and nearby telephone cables interfered. The ex treme length was required because e could remove the subbasement wall only belweeh two columns, which were on L2-ft centers. The chilling and condens ing units were canted in the pit to pait between the columns. Wot Circuit. General scheme for distributing the water is to heat or chill it In the subbasement machine runs cu* *hh oidic* room and then pump It to an attic |L. &Mind hommers, above the thirteenth floor. From tjJgL. Oggysnent parts of the system are; it U distributed to downfeed rberffljf jgjto|htoductlon type unit designed individual room units and to Ou-fijfp{ggttilLt<)on in each air-conditioned tral-itotion air system. A tetorg gjW MsfiSad for under-window air dis- oo the second-floor ceiling eoDecu^fijlj water and carries It to the air-distribution ryiicm a do,ed circulating ly.tcm. "1M.e.uiriei cotuictlng The ccntr.! rntlon ha "PPlrtt{lBPl^S,i1ilon conditioning equip- is on the thirteenth floor with ib',S] ,w------- ,, id necessary conduit, |tributing conduit In the attic `ipST above. Air goes to the individual roSij units through conduit located same space with the water supply 'ui vulaiing water pipes, cone asi and controls. return line*. This vertical distribution lym white easy to install In a new bsfldL. presents certain problems in ths.7sj modeling of an occupied structure? pecially a hotel. For instance, bf] office building work can be dentf^ night with occupancy eeatini_, throughout norraot working hoortli hotel, however. Is normally ocet 24 hours a day, which nccesslutti IS moving a room from service end plating all work before it is coftiidt reedy (or occupancy. Room Grouping. In the Ansley Hi each vertical tet of risers serves a mum of ten rooms. Careful investqij tion showed that, to keep the reqob demolition, installation and rtdteei Uit. Under-the-window units f a mixing stack where prir (outside alt) from a central ad dehnmidifying source is with induced (secondary sir) Injtn the room over a platefin the unit. Temperature of the upplled to individual units Is _ _rd it remote source in ecSdioeo with tone requirements. A ftpeSi] deriee, which the room oecu"pSfcaa adjust, controls water flow to tion moving at the most economfL., Jpndasl units. speed, it would be necessary to haryj Sghs system Includes a specially de- minimum of five "stacks," or 50 out of service at the same time. ""J a set of risers serves more than Serf sound-absorbing plenum chatsseriUbteb reduces air noise generated the risen to an occeptable level. stock, additional rooms wete, of coungj ^tkert'esteatia( parts are a regular drip- required, - - tad-gniier assembly to collect con* gCutting Floor Holes. As the ^olellSHR^t.oH, wthheichunmitigisht nooctcuinr uonpdeerar tiaobn-. of ref'nf*orced'-concrete constructien, rtJ- "Anot*hjercfoenadtuitrieoniss, thaendnoannlesemtheargternecsyting floor holes for conduit risers bj31| |~tisrt.eP'>Mif.tfolowcoilnledcutcctioonndernastiaotioonf faobrmou-t noisy job at best. We first tried id crfjlr '^hJtrfitlao.thoaner.eTtuhrins bmeendans,s ctohnattr,oflonrsseeamc-h Bacetylene flame, hoping that tbe cgll jbjskr,fsometall0l{eaakisr Indisccohnanregcetdionbs.y (he Crete might be calcined su6kiovilli3|j lour cubic feet are drawn from allow cutting a hole of the desired o? ^'owa Cbutmo lotbtleonu, nitAbny aInddjuuscttiionng. cumfercnce. This did not prove snee^ jggc.'suuUrespoosbstiablienintgo pdroopperracntoicxaxlely ful. Next, we used carbide-lipped ^ dealintog inandducheetahteingdewsiirtehd oanilry colrn-e Holes, 94 in. In diameter, were drifl ^jijtffisitatts. tfat cwanhiblee pursiemdafroyr asihtultiooffmputrh*e around the circumference and the o station fulfills the ventilating ter kno'cwked oouutt.. Tiihuias method was . successful and the high of drill breakage made ft tmec,0|j| cal. Accordingly, it was b*cdJg After two attempts the majonty.Jj iSjjrtoenu and maintains proper ra^*ty conditions. This separation of iS&fooctions of temperature and hu- controls makes it possible to 70 1140) POWER M.* The filtered, dehumidified prtmory olr fed lo the room unit induces room-clr circulation over o cooling or heating coil in the circutotinQ-woter circuit 1141) ? to