Page 3 - he Sigma F Series
Marley / Sigma F Series Cooling Tower / 3 T he Sigma F Series is a field-erected, crossflow, fiberglass-structure cooling tower designed to serve normal air conditioning and refrigeration systems as well as medium sized industrial loads. Evolving from the crossflow concept of cooling tower pioneered...
Page 4 - TOP OF; NOTE; se this bulletin for preliminary layouts only.; Tower; TOWER PLAN
Marley / Sigma F Series Cooling Tower / Engineering Data : Schematic 4 H B TOP OF FAN CYLINDER BASE OF TOWER COLUMNS FAN DECK 13'-6" NOTE 1 U se this bulletin for preliminary layouts only. Obtain current drawings from your Marley representative. 2 All table data is per cell. 3 All tower installa...
Page 5 - PLAN; Use this bulletin for preliminary layouts only.; SECTION; lb
Marley / Sigma F Series Cooling Tower / Engineering Data : Support 5 A SPACES AT 4'-0" = L W OVERALL OF B ASIN SUMP OVERFLOW MAKEUP VALVE INTERMEDIATE BEAM AIR INLET FACE AIR INLET FACE CASED ENDW ALL F ACE CASED ENDW ALL F ACE PRIMARY SUPPORT BEAM PLAN ELEVATION NOTE 1 Use this bulletin for pre...
Page 6 - MIN; SUMP; OPTIONAL PARTITION WALL; SECTION B; TOP OF BASIN CURB; SECTION P
Marley / Sigma F Series Cooling Tower / Engineering Data : Support 6 A SPACES AT 4'-0" = L 6 " MIN TYP SUMP SEE NOTE 7 OPTIONAL PARTITION WALL FOR INDIVIDUAL CELL OPERATION B B P AIR INLET FACE AIR INLET FACE CASED ENDW ALL F ACE CASED ENDW ALL F ACE W IN T O IN OF CURB W ALLS PLAN 1 ' -6 &#...
Page 7 - GPM; Dimensions
Marley / Sigma F Series Cooling Tower / Engineering Data : Piping Plan 2 7 C MOTOR C F COLUMN AND ANCHOR BOLT TYP. SINGLE CELL D TYP. MULTICELL CL COLUMN AND ANCHOR BOLT CL INLET C L TOWER AND FAN C L FAN CL FAN CL INLET CL INLET CL F FAN TOWER CL INLET CL MOTOR CONCRETE BASIN OPTION B DIAMETER CROS...
Page 8 - END ELEVATION; CL CL; SIDE ELEVATION
Marley / Sigma F Series Cooling Tower / Engineering Data : Piping Plan 3 8 C H MOTOR C F COLUMN AND ANCHOR BOLT TYP. SINGLE CELL D TYP. MULTICELL CL COLUMN AND ANCHOR BOLT CL RISER C L TOWER AND F AN C L FAN CL FAN CL RISER CL PLAN F FAN TOWER CL INLET RISER CL MOTOR CONCRETE BASIN OPTION B DIAMETER...
Page 9 - RISER AND HEADER
Marley / Sigma F Series Cooling Tower / Engineering Data : Piping Plan 4 9 C H MOTOR C F COLUMN AND ANCHOR BOLT TYP. SINGLE CELL D TYP. MULTICELL CL COLUMN AND ANCHOR BOLT CL RISER AND HEADER C L TOWER AND F AN C L FAN CL FAN CL RISER CL H E G FAN FLANGE IS 3 / 4 " THICK. BOLT CIRCLE CONFORMS TO...
Page 10 - CAUTION; Cooling Tower Energy and its Management; Operating Cooling Towers During Freezing Weather; Variable Speed Fan
Marley / Sigma F Series Cooling Tower / Engineering Data: Energy Management 10 CAUTION The cooling tower must be located at such distance and direction to avoid the possibility of contaminated tower discharge air being drawn into building fresh air intake ducts. The purchaser should obtain the servi...
Page 11 - Sound Control; External Influences on Cool-; Keeping It Clean
Marley / Sigma F Series Cooling Tower / Engineering Data: Environmental 11 Sound Control Sound produced by a Sigma tower operating in an unobstructed environment will meet all but the most restrictive noise limita- tions—and will react favorably to natural attenuation. Where the tower has been sized...
Page 12 - Marley
Specifications Specification Value Marley / Sigma F Series Cooling Tower / Specifications: Base 12 1.0 Base: 1.1 Furnish and install an induced-draft, crossflow-type, field-erected, structural fiberglass-framed, PVC film-fill, industrial- duty cooling tower of _____ cell(s), as shown on Plans. The l...
Page 15 - Fan Deck and Fan Cylinder:
Specifications Specification Value Marley / Sigma F Series 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 consist of 1 1/8" (28.5 mm) deep pultruded fiberglass interlocking pan- els, supp...
Page 16 - Fill, Louvers and Drift Eliminators
Specifications Specification Value Marley / Sigma F Series Cooling Tower / Specifications: Base 16 5.4 A stainless steel oil fill and drain line shall extend from the gear reducer to the vicinity of the motor, and shall be equipped with a bronze-bodied oil level sight-glass gauge. 5.5 The complete m...
Page 17 - Hot Water Distribution System:
Specifications Specification Value Marley / Sigma F Series Cooling Tower / Specifications: Base 17 7.0 Hot Water Distribution System: 7.1 The mechanical equipment support/crossover pipe for each cell shall be equipped with a flange for the attachment of customer supply piping. Inlet and bolt circle ...
Page 19 - Scope of Work
Specifications Specification Value Marley / Sigma F Series Cooling Tower / Specifications: Base 19 11.0 Scope of Work : 11.1 The cooling tower manufacturer shall be responsible for the design, fabrica- tion, and delivery of materials to the project site, and for the erection of the tower over suppor...
Page 20 - Specifications; Specification Value; Cold Water Basin Options; Replace paragraph 10.1 with the; Watertight Partition between Tower; Replace paragraph 10.2 with the
Specifications Marley / Sigma F Series Cooling Tower / Specifications: Options 20 Specification Value Cold Water Basin Options Stainless Steel Cold Water Basin : 10.1 Replace paragraph 10.1 with the following: Include a cold water col- lection basin constructed of 12 gauge series 304 stainless steel...
Page 21 - Convenience and Safety Options; Replace paragraph 9.3 with the
Specifications Marley / Sigma F Series Cooling Tower / Specifications: Options 21 Specification Value and a solid state circuit board for tem- perature control and low water cutoff. A control probe shall be located in the basin to monitor water level and tem- perature. The system shall be capable of...
Page 22 - Hot Water Basin Covers:
Specifications Marley / Sigma F Series Cooling Tower / Specifications: Options 22 Specification Value Plenum Walkway: 9.1 Add the following to the end of this paragraph: Provide a 30" (762 mm) minimum wide walkway extending from one endwall access door to the other through the length of the towe...
Page 23 - Add the following paragraph in the; Appearance Options; Replace paragraph 8.1 with the
Specifications Marley / Sigma F Series Cooling Tower / Specifications: Options 23 Specification Value Air Inlet Screens: 6.3 Add the following paragraph in the Fill, Louvers and Drift Eliminators section: The air inlet faces of the tower shall be covered by 1" mesh stainless steel welded wire sc...
Page 24 - Control Options; Add the following paragraphs in
Specifications Marley / Sigma F Series Cooling Tower / Specifications: Options 24 Specification Value Control Options Control System: 5.7 Add the following paragraphs in the Mechanical Equipment sec- tion: Each cell of the cooling tower shall be equipped with a UL listed control system in a NEMA 3R ...
Page 25 - Fan Motor Variable Speed Drive:
Specifications Marley / Sigma F Series Cooling Tower / Specifications: Options 25 Specification Value Fan Motor Variable Speed Drive: Marley All Weather ACH550 System 6.4 Add the following paragraph in the Mechanical Equipment section when VFD is used with customers Building Management System: A com...
Page 26 - Marley Premium VFD System
Specifications Marley / Sigma F Series Cooling Tower / Specifications: Options 26 Specification Value and cooling is no longer required. The fluid cooler manufacturer shall supply VFD start-up assistance. Tower vibration testing throughout the speed range is required to identify and lockout any natu...
Page 27 - Vibration Limit Switch:; Miscellaneous Options
Specifications Marley / Sigma F Series Cooling Tower / Specifications: Options 27 Specification Value ■ Unless specified otherwise, a Robertshaw or Metrix switch will be provided. Double-pole, double-throw models are also avail- able. If purchased in conjunction with the Control System, it is also f...
Page 28 - Change paragraph 9.3 to read as; Fan Cylinder Extension:; Add a third sentence in paragraph; Increased Wind and/or Earthquake
Specifications Marley / Sigma F Series Cooling Tower / Specifications: Options 28 Specification Value Fiberglass Ladder: 9.3 Change paragraph 9.3 to read as follows: One endwall of the tower shall be equipped with an 18" (457 mm) wide fiberglass vertical ladder, supported by hot-dip galvanized s...
