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Home My WebLink AboutOrdinance 8424 ORDINANCE NO _~~ AN ORDINANCE AMENDING ORDINANCE NO 8097 THE FORT WORTH MECHANICAL CODE PROVIDING FOR THE AMENDMENT OF REGULATION OF THE EMISSION OF INDIRECT WASTES FROM AIR CONDITIONER UNIT COILS PROVIDING FOR THE AMENDMENT OF REGULA- TION OF INSULATION OF AIR CONDITIONER UNIT DUCT SYSTEMS MAKING THIS ORDINANCE CUMULA- TIVE OF PRIOR ORDINANCES AND REPEALING ALL PRIOR ORDINANCES IN CONFLICT HEREWITH AND PROVIDING A SEVERABILITY CLAUSE AND NAMING AN EFFECTIVE DATE BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF FORT WORTH TEXAS SECTION 1 Section 510 of Ordinance No 8097 is hereby amended so that hereafter the same shall be and read as follows Indirect Waste Connections Sec 510 (a) Condensate Taste Condensate from air cooling coils shall be collected and discharged to an approved plumbing fixture with an open sight air gap or to an approved disposal area The drain shall have a slope of not less than 1/8 inch per foot and shall be of non-ferrous metal pipe of at least 3/4 inch inside diameter EXCEPTIONS 1 The condensate piping material from an air cooling coil may be of rigid schedule forty PVC or CPVC pipe when the total 1 ength does not exceed six (6) feet overall is located and exposed in the same enclosure as the air cooling coil inside the building and this enclosure is not used as an air plenum 2 The inside diameter of the piping from a condensate pump may be the same size but not smaller than that of the pump discharge 3 Cooling unit condensate drains may discharge into a roof drain if the roof drain connects directly into a storm sewer 4 In the event sanitary sewer connections are not readily available the Building Official may permit air conditioning units of no more than 7-1/2 tons to discharge their condensate drainage into an approved disposal area 5 Piping for drain lines from Group II refrigeration equipment may be of galvanized ferrous metal When the condensate waste from air conditioning coils discharges by direct connection to a lavatory tailpiece or to an approved accessible inlet on a bath- tub overflow the connection shall be located in the area controlled by the same person controlling the air conditioned space .,~. Condensate drain pipes shall be no smaller than the appliance drain outlet Multiple drains shall be sized per Table 5 Condensate drain pipes shall be permanently sup- ported not more than 10 feet on centers and maintain minimum fall Supports must be of a permanent material extending at least 3 inches on either side of the drain pipe Pipe exposed to weather shall be secured to the supports with galvanized iron strips and screws (b) Approved Condensate Disposal Area Approved disposal area may be a French sump having a minimum dimension of 2 x2 x 1-1/2 deep a minimum distance of 3 feet from a foundation filled with small crushed rock or washed gravel to within 6 of the top and covered with dirt and turf to a depth of not less than 6 The condensate pipe shall terminate into an approved non-metallic bottomless container having perforated side walls (c) Vacuum Breaker Condensate drains from draw through cooling units shall have an open pipe vacuum breaker in the pipe connection at the unit (d) Drainpipe Le horizontal length of condensate drains shall Piping shall be sized in basis of the nominal connected thereto ~ngth The overall developed a piping system collecting not exceed 200 in length accordance with Table 5 on the total tonnage of the units (e) Emergency Overflow An emergency overflow from a cooling coil condensate collector pan or an additional water-tight pan of corrosion resistant metal shall be installed in connection with a cooling coil which is located above an occupied space The overflow condensate shall be discharged at a point which can be readily •observed by the occupant Emergency overflow outlet and piping shall be the size of the condensate drain and may be uninsulated EXCEPTION Equipment in a room with a waterproof floor having a floor drain need not have an emergency overflow Condensate Drainpipe Insulation All condensate drain lines located above a ceiling in stud spaces furnace enclosures or any other spaces where condensed moisture from a drain line could cause damage shall be insulated in accordance with Section 2502 (c) EXCEPTION Insulation will not be required where PVC or CPVC pipe is allowed T -2- ~; (g) Equipment Drains Drains from equipment discharging unpolluted water such as boiler blow-off cooling tower overflow or drainage processing system or other systems which require periodic or continuous draining as a means of disposing liquid wastes shall not be discharged into sanitary sewers if a closed storm sewer or an approved disposal is available and if such discharge is permitted by the Fort Worth Water Pollution Code A settling basis oil skimming or solids removal equipment or a waste treatment plan will constitute an approved area provided the effluent qualities as unpolluted water or waste as defined in the Fort Worth Water Pollution Code Equipment drains may be ferrous or nonferrous metal and not less than the unit drain outlet in size (h) Humidifer Drains Drains from humidifiers shall discharge into a sanitary sewer Piping materials may be ferrous or nonferrous Where humidifer dis- charges into a condensate drain pipe it must not de- crease the pipe size or create a potential overflow (i) Public Ways Condensate or waste water shall not drain over a public way TABLE 5 Minimum Total Horizontal Tonna a Drain Size 0 - 10 3 4" 11 - 20 1 21 - 40 1-1/4 41 - 60 1-1/2 61 - 100 2 111 - Up 3 This table is based on smooth pipe Fig 14 flow chart Chapter 32 ASHRAE FUNDAMENTALS 1977 SECTION 2 Section 2501 of Ordinance No 8097, as it appears in the form of TABLE 25-D DUCT LOCATION Condition #4 Note #1 be amended to read as follows NOTE 1 Insulation may be omitted on a maximum of six (6) feet length of branch or run-out ducts to a ceiling air diffuser and on the diffuser itself if such is located within a concealed conditioned space that forms a plenum for circulating air SECTION 3 Should any portion section or part of a section of this Ordinance be declared invalid inoperative or void for any reason by a court of competent jurisdiction such decision opinion or judgment shall in no way impair the remaining portions sections -3- .T .. or parts of sections of this Ordinance which said remaining provisions shall be and remain in full force and effect SECTION 4 This Ordinance shall be cumulative of Ordinance No 8097 and all other ordinances and appropriations amending the same except in those instances where the provisions of this Ordinance are in direct conflict with such other ordinances and appropriations in which instances said conflicting provisions are hereby expressly repealed SECTION 5 Said Ordinance shall take effect and be in full force and effect from and after the date of its passage and it is so ordained APPROVED AS TO FORM AND LEGALITY Ci y Attorney(('' ~~. ADOPTED ..JP/h.~~.~n, ~.~, / ~~ EFFECTIVE ~ ~~ ~ f ~ I -4- --~ _~ v,~r~° .. .~~ay~r aid c~oa,~n~~l ~oa~a,rnuna~ataon DATE REFERENCE NUMBER SUBJECT Amendment t0 Mechanical Code PAGE ~~G-5106 i of 1 The Mechanical Code was adopted by the Fmrt Worth Oii~y Council in 1970 This Cod is modeled from the Uniform Mechanical Code published by the International Cmr~ference of Building Officials (TCBO) Local amendments are added to make up the Fort Worth Code The .Mechanical Board and City staff review each new TCBO Edition which is~published~ every three years During the interim the Mechanics Board continues to hear code change requests The Mechanical Board has heard requests for the following two c(rde changes Both changes will make the Code less restrictive and lower construction costs The changes affect Section 510 which regulates indirect waste from air conditio- ning fioils One change allows the use of plastic pipe material for limited locations The other change affects Table 25D which regulates the insulation for air conditioning duct systems This change will allow a portable-type air diffuser which can be used for lay-in block ceiling The flexible duc~ and diffuser may have the insulation omitted when they are located in the circulating air plenum Recommendation Tt is recommended that the City Council adopt the attached ordinance amending the Mechanical Code of the City of Fort Worth to effectuate the proposed change 60 days after adoption as recommended by the Mechanical Board GG plg Attachment APPROV C L UN ciTY co c~~ 22 1981 E; ecxetazy of the oR Fort Wozth, T~a$ C PT~:D ORDdNAr~c~ Na g4~,4 ADO ~.,~..~.,,~....._...K:~. ______........_.~~......~. SA6SMITTfp fpFt THE -. CITY MANAGER'S OFFICE SY: _ __.-..-~ ~t~__ •~~'-? J t.-----'-- __ DISPOSITION 8Y COUNCIL: ^ APPROVED PROCESSED BY ~ ORIGIfdATIN(? ^ OTHER (DESCRIBE) DEPARTMENT HEAD: ,JO.e Bllardi CITY SECRETARY FOR AppITIONAL INFORMATION CDNTAGT Lester Pai a Ext 7820 DATE