Page 2 - Marley; Cooling Tower; Table of Contents
Marley / Sigma 1000/1200 Cooling Tower / Table of Contents Engineering Data 1000 Schematic 4 1000 Piping 5 1000 Support 6 1200 Schematic 8 1200 Piping 9 1200 Support 10 Energy Management 12 Environmental 13 Specifications / Base Base 14 Thermal Performance 15 Construction 16 Fan Deck and Fan Cylinde...
Page 4 - OUT; PLAN; NotE; Last number of model indicates number of cells. Change as
Marley / Sigma 1000 Cooling Tower / Engineering Data : Schematic 4 B H TOP OFFAN CYLINDER BASE OFTOWER COLUMNS TOP OFFAN DECK W OUT T O OUT OF TOWER 5" CL COL. A BAYS @ 4'-0 = L CL COL. CL COL. 5" C DIA. FAN PLAN ENdwALL ELEvAtioN NotE 1 Last number of model indicates number of cells. Change...
Page 5 - ENdwALL; Use this bulletin for preliminary layouts only.; Tower
Marley / Sigma 1000 Cooling Tower / Engineering Data : Piping 5 F MINIMUM CL INLET CL COL. C CL INLET D TYP. MULTI-CELL PIPING SHOWN WITH DASHED LINES IS BY OTHERS E FACE OF A DIA. INLET PIPING C L TOWER FAN C L TOWER FAN B DIA. FLOW CONTROL VALVE AND CROSS OVER PIPING PLAN G BASE OF TOWER COLUMNS C...
Page 7 - FLAt BAsiN sEctioN
Marley / Sigma 1000 Cooling Tower / Engineering Data : Concrete Basin 7 NotE 1 Use this bulletin for preliminary layouts only. Do not use for construction. Obtain current drawings from your Marley sales representative. Concrete basin design and construction are by other contractors or purchaser. 2 O...
Page 11 - Use this bulletin for preliminary layouts only
Marley / Sigma 1200 Cooling Tower / Engineering Data : Concrete Basin 11 NotE 1 Use this bulletin for preliminary layouts only . Do not use for construction. Obtain current drawings from your Marley sales representative. Concrete basin design and construction are by other contractors or purchaser. 2...
Page 12 - Cooling Tower Energy
Marley / Sigma 1000/1200 Cooling Tower / Engineering Data: Energy Management 12 Cooling towers are usually selected to produce a specific cold water temperature at the higher summer-time wet-bulb temperatures. During the remainder of the year, the cooling tower is capable of producing much colder wa...
Page 13 - Enclosures; Marley Technical Report; External Influences on Cooling Tower Perfor-; CAUTION
Marley / Sigma 1000/1200 Cooling Tower / Engineering Data: Environmental 13 Enclosures Occasionally, cooling towers are located inside architectural enclosures for aesthetic reasons. Although Sigma towers adapt well to enclosures, a poorly designed enclosure can impair proper operation. An effective...
Page 14 - Plans. The limiting overall dimensions
Specifications Specification Value Marley / Sigma 1000/1200 Cooling Tower / Specifications: Base 14 1.0 Base: 1.1 Furnish and install an induced-draft, crossflow-type, field-erected, wood- framed, PVC fill, industrial-duty cooling tower of _____ cell(s), as shown on Plans. The limiting overall dimen...
Page 15 - Under no circumstances should you allow the manufacturer to; Typical cooling tower performance curve.
Specifications Specification Value Marley / Sigma 1000/1200 Cooling Tower / Specifications: Base 15 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 manufactu...
Page 16 - If
Specifications Specification Value Marley / Sigma 1000/1200 Cooling Tower / Specifications: Base 16 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 750 ppm; a sulfate content (SO4 ) up to 1200 ppm; a sodium bicarbona...
Page 17 - Fan Deck and Fan Cylinder:; Diagonal Connector
Specifications Specification Value Marley / Sigma 1000/1200 Cooling Tower / Specifications: Base 17 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 1" thick, 7 ply, exterior grade, treated Douglas F...
Page 18 - Mechanical Equipment:
Specifications Specification Value Marley / Sigma 1000/1200 Cooling Tower / Specifications: Base 18 5.0 Mechanical Equipment: 5.1 Fan(s) shall be propeller-type, incorpo- rating heavy duty blades of cast alumi- num or high strength, inert composite material. Blades shall be individually adjustable a...
Page 19 - Louver
Specifications Specification Value Marley / Sigma 1000/1200 Cooling Tower / Specifications: Base 19 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 struc...
Page 20 - Hot Water Distribution System:
Specifications Specification Value Marley / Sigma 1000/1200 Cooling Tower / Specifications: Base 20 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 basi...
Page 21 - Cold Water Collection Basin
Specifications Specification Value Marley / Sigma 1000/1200 Cooling Tower / Specifications: Base 21 9.3 Each endwall of the tower shall be equipped with a 20" wide aluminum vertical ladder, through-bolted to the endwall structure. Ladder shall rise from the cold water basin level to the top of t...
Page 22 - Specifications; Specification Value; Control Options; Add the following paragraph in
Specifications Marley / Sigma 1000/1200 Cooling Tower / Specifications: Options 22 Specification Value 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...
Page 23 - Fan Motor Variable Speed Drive:; Add the following paragraph in the
Specifications Marley / Sigma 1000/1200 Cooling Tower / Specifications: Options 23 Specification Value Basin Heater: 10.2 Add the following paragraph in the Cold Water Basin section: Provide a system of electric immersion heat- ers and controls for each cell of the tower to prevent freezing of water...
Page 24 - Marley Premium VFD System
Specifications Marley / Sigma 1000/1200 Cooling Tower / Specifications: Options 24 Specification Value to modulate fan speed maintaining set point temperature. The drive's panel dis- play shall be able to display the set-point temperature and cold-fluid temperature on two separate lines. The bypass ...
Page 25 - Vibration Limit Switch:
Specifications Marley / Sigma 1000/1200 Cooling Tower / Specifications: Options 25 Specification Value set point shall be displayed on the door of the control panel. The bypass shall include a complete magnetic bypass circuit with capability to isolate the VFD when in the bypass mode. Transfer to th...
Page 26 - Convenience and Safety Options; Add the following to the end of this
Specifications Marley / Sigma 1000/1200 Cooling Tower / Specifications: Options 26 Specification Value Convenience and Safety Options Stairway: 9.3 Replace paragraph 9.3 with the fol- lowing: A 30" wide, column supported, 45° stairway with 8" rise and run of treated Douglas Fir shall be prov...
Page 27 - Oil Level Sight Glass:
Specifications Marley / Sigma 1000/1200 Cooling Tower / Specifications: Options 27 Specification Value 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 w...
Page 28 - Add the following at the end of this
Specifications Marley / Sigma 1000/1200 Cooling Tower / Specifications: Options 28 Specification Value 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 ...
Page 29 - Watertight Partitions Between Cells:; Replace the last sentence in this
Specifications Marley / Sigma 1000/1200 Cooling Tower / Specifications: Options 29 Specification Value Watertight Partitions Between Cells: 3.5 Replace the last sentence in this paragraph with the following: Partitions shall be 3/4" x 5-ply, factory- fabricated, grooved and splined treated Dougl...
