Page 5 - he Sigma Steel
Marley / Sigma Steel Cooling Tower / 5 only accomplish the specified thermal performance— but which will include normal operation- and mainte- nance-enhancing accessories and features. It will also incorporate those standard materials which testing and experience has proven to provide best results i...
Page 6 - DIAMETER FAN; COLUMN; CL; OUT; NOTE; Use this bulletin for preliminary layouts only.; TOP OF; per cell
Marley / Sigma Steel Cooling Tower / Engineering Data : Schematic 6 Use this data for preliminary layouts only. Obtain current drawing from your Marley sales representative. The UPDATE web-based selection software —available at spxcooling.com—provides Sigma Steel model recommendations based on custo...
Page 7 - Plan; OVERALL OF B; Section; lb
Marley / Sigma Steel Cooling Tower / Engineering Data : Support 7 Plan A SPACES AT 4'-0" = L 6" W OVERALL OF B ASIN SUMP OVERFLOW AIR INLET FACE AIR INLET FACE CASED ENDW ALL F ACE CASED ENDW ALL F ACE PRIMARY SUPPORT BEAM INTERMEDIATE BEAM NOTE 1 Use this bulletin for preliminary layouts on...
Page 8 - ANCHOR BOLTS; SUMP
Marley / Sigma Steel Cooling Tower / Engineering Data : Concrete Basin 8 Plan 6" MIN. 5" 6" MIN. 5" ANCHOR BOLTS (SEE NOTE 5) 6" MIN. 6" MIN. A SP ACES A T 4'-0" = L PER CELL CASED ENDWALL FACE CASED ENDWALL FACE AIR INLET F ACE AIR INLET F ACE SUMP W IN TO IN OF BASIN NO...
Page 9 - Dimensions
Marley / Sigma Steel Cooling Tower / Engineering Data : Inlet Piping 9 C C COLUMN AND ANCHOR BOLT TYP. SINGLE CELL D TYP. MULTICELL CL COLUMN AND ANCHOR BOLT CL FAN CL INLET CL INLET CL FAN CL F MIN REQUIRED CLEARANCE C L E G C OF FLANGE TO BASE OF TOWER COLUMNS (USE FOR STATIC LIFT) FAN FACE OF A D...
Page 10 - Marley Technical Report
Marley / Sigma Steel Cooling Tower / Engineering Data: Environmental 10 Sound Control Sound produced by a Sigma Steel tower operating in an un- obstructed environment will meet all but the most restrictive noise limitations—and will react favorably to natural attenu- ation. Where the tower has been ...
Page 11 - control. For greater insight on cold water temperature control,; “Cooling Tower Energy and its Management; Frequency modulation devices work well on induced draft,
Marley / Sigma Steel Cooling Tower / Engineering Data: Energy Management 11 Cooling towers are usually selected to produce a specific cold water temperature at the higher summertime wet-bulb temperatures. During the remainder of the year, the cooling tower is capable of producing much colder water. ...
Page 12 - Marley; Plans. The limiting overall dimensions
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Base 12 1.0 Base: 1.1 Furnish and install an induced-draft, crossflow-type, field-erected, steel- framed, PVC-fill, industrial-duty cooling tower of _____ cell(s), as shown on Plans. The limiting overall dimensio...
Page 13 - the life of the tower—and imposes no penalty on the manufacturer.; Typical cooling tower performance curve.
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Base 13 2.0 Thermal Performance: 2.1 The tower shall be capable of cooling _____ GPM of water from ____ °F to _____ °F at a design entering air wet- bulb temperature of _____ °F. The cool - ing tower manufacturer...
Page 14 - peratures up to 120°F. The circulating
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Base 14 3.0 Construction: 3.1 The tower shall be capable of with- standing water having a pH of 6.5 to 8.0; a chloride content (NaCl) up to 300 ppm; a sulfate content (SO4 ) up to 250 ppm; a calcium content (CaCO...
Page 15 - Fan Deck and Fan Cylinder:; Fan cylinders shall be molded FRP.; Mechanical Equipment:
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Base 15 4.0 Fan Deck and Fan Cylinder: 4.1 The fan deck shall act as a working platform for maintenance personnel. It shall be fabricated of no less than 12 gauge steel, and shall be designed for a uniform live l...
Page 16 - fan is properly positioned within the fan cylinder.
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Base 16 5.3 Motor shall be located outside the fan cylinder at the fan deck, and shall be connected to the speed reducer by a tubular stainless steel, dynamically balanced driveshaft equipped with neo- prene flex...
Page 17 - formed as part of each fill sheet. Fill; Louver
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Base 17 6.0 Fill, Louvers and Drift Eliminators: 6.1 Fill shall be film-type, 15 mil thick, thermoformed PVC, with louvers formed as part of each fill sheet. Fill shall be suspended from stainless steel structura...
Page 18 - Hot Water Distribution System:; corrugated FRP panels, attached with
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Base 18 7.0 Hot Water Distribution System: 7.1 The mechanical equipment support/ crossover pipe shall deliver water to two open hot water basins per cell at the fan deck elevation. Water shall exit these basins t...
Page 19 - Cold Water Collection Basin
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Base 19 9.2 The top of the tower shall be equipped with a sturdy 42" high guardrail sys- tem, complete with top rails, interme- diate rails and toeboards, conforming to OSHA standards. Guardrails and posts sh...
Page 20 - Control Options; Add the following paragraph in
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Options 20 Control Options Control System: 5.7: Add the following paragraph in the Mechanical Equipment section: Each cell of the cooling tower shall be equipped with a UL listed control system in a NEMA 3R or 4X...
Page 21 - Fan Motor Variable Speed Drive:; Add the following paragraph in the
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Options 21 Basin Heaters: 10.2 Add the following paragraph in the Cold Water Basin section: Provide a system of electric immersion heaters and controls for each cell of the tower to prevent freezing of water in t...
Page 22 - Marley Premium VFD System
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Options 22 temperature and cold-fluid temperature on two separate lines. The bypass shall include a complete magnetic bypass circuit and with capability to isolate the VFD when in the bypass mode. Transfer to the...
Page 23 - circuit with capability to isolate the VFD; Vibration Limit Switch:
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Options 23 circuit with capability to isolate the VFD when in the bypass mode. Transfer to the bypass mode shall be automatic in the event of VFD failure or for specific trip conditions allowing safe transfer of ...
Page 24 - Convenience and Safety Options; Add the following to the end of this
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Options 24 Convenience and Safety Options Stairway: 9.3 Replace paragraph 9.3 with the fol- lowing: A 30" wide, 45° steel stairway with 8" rise and run, shall be provided at the tower endwall rising from ...
Page 25 - Oil Level Sight Glass:; Include a cold water collection; Factory Mutual Approval:; Hot Water Basin Covers:; Add the following paragraph to
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Options 25 Oil Level Sight Glass: 5.4 Replace paragraph 5.4 with the fol- lowing: A galvanized oil gauge and drain line shall extend from the gear reducer to the vicinity of the motor, and shall be equipped with ...
Page 26 - Add the following at the end of this
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Options 26 Low Noise Tower: 1.1 Add the following at the end of this paragraph: The cooling tower shall be quiet operating, and shall produce an overall level of sound no higher than ____ dBA at the critical loca...
Page 27 - stainless steel for materials of construction in the tower.
Specifications Specification Value Marley / Sigma Steel Cooling Tower / Specifications: Options 27 Service Life-Related Customization: ■ Some adverse water conditions, unsatisfactory air quality, and/or pro- cesses that produce corrosive contaminants, may dictate the use of stainless steel for mater...
