Page 2 - Marley; NC Class Stainless; Cooling Tower; Contents
Specifications / Base Base 4 Thermal Performance 4 Performance Warranty 5 Design Loading 5 Construction 6 Mechanical Equipment 7 Fill, Louvers and Drift Eliminators 8 Hot Water Distribution System 9 Casing, Fan Deck and Fan Cylinder 9 Access 10 Cold Water Collection Basin 10 Specifications / Options...
Page 3 - NC Class Stainless Steel; NC Class
Marley / NC Class Stainless Cooling Tower / 3 NC Class Stainless Steel towers are factory assembled, crossflow cooling towers, designed to serve air conditioning and refrigeration systems as well as light to medium industrial process loads on clean water. They evolve from a factory-assembled concept...
Page 4 - the maximum fan kW/cell will work to your advantage.
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Base 4 1.0 Base: 1.1 Provide an induced draft, crossflow type, factory assembled, film fill, industrial duty, stainless steel cooling tower situated as shown on the plans. The limiting overall dimensions o...
Page 5 - Thermal Performance and Efficiency:; structure
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Base 5 2.0 Thermal Performance and Efficiency: 2.1 The tower shall be capable of cooling _____ m 3 /h of water from ____ °C to _____ °C at a design entering air wet- bulb temperature of _____ C and its the...
Page 7 - Mechanical Equipment; *Currently available on Models NC8304 through
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Base 7 5.3* The tower shall include all design and material modifications necessary to meet the fire rating requirements of Factory Mutual. The product proposed shall be listed in the FM Approval Guide, la...
Page 8 - LOUVERS
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Base 8 LOUVERS DRIFT ELIMINATOR separate from fill on some models FILL 7.0 Fill, Louvers and Drift Eliminators: 7.1 Fill shall be film type, thermoformed of 0.40mm thick PVC, with louvers formed as part of...
Page 9 - Hot Water Distribution System:; Also, these basins are located where they can be easily inspected—
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Base 9 8.0 Hot Water Distribution System: 8.1 Two stainless steel open basins (one above each bank of fill) shall receive hot water piped to each cell of the tower. These basins shall be installed and seal...
Page 10 - Cold Water Collection Basin
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Base 10 10.0 Access: 10.1 A large stainless steel, rectangular access door shall be located on both end panels for entry into the cold water basin. Doors shall provide access to the fan plenum area to faci...
Page 11 - Specifications: Options; Convenience and Safety Options
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Options 11 Convenience and Safety Options Guardrail and Ladder: 11.2 Add the following paragraph in the Access section: The top of the tower shall be equipped with a sturdy guardrail, complete with kneerai...
Page 13 - Add the following paragraph in the
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Options 13 Access Door Platform: 11.2 Add the following paragraph in the Access section: There shall be an access platform at the base of the tower extending from the vertical lad- der to the endwall acces...
Page 14 - Control Options; Add the following paragraph in
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Options 14 Control Options Fan Motor Starter Control Panel: 6.4 Add the following paragraph in the Mechanical Equipment sec- tion: Each cell of the cooling tower shall be equipped with a UL listed control ...
Page 15 - Vibration Limit Switch:; Electric Water Level Control:; Replace this paragraph with the fol-
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Options 15 Vibration Limit Switch: 6.5 Add the following paragraph in the Mechanical Equipment section: A single-pole, double-throw vibration limit switch in a IP56 housing shall be installed on the mechan...
Page 16 - Fan Motor Variable Speed Drive:
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Options 16 in quantities and locations as indicated on the drawings. An overflow and drain connection shall be provided in each cell of the cooling tower. The basin floor shall slope toward the drain to al...
Page 17 - Marley Premium VFD System
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Options 17 cold-water temperature. The application must be able to handle very cold water while VFD is in a by-pass mode. Operator controls shall be mounted on the front of the enclosure and shall consist ...
Page 18 - Miscellaneous Options; Add the following to the end of this; Fan Cylinder Extensions:; Insert the following after the first
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Options 18 shall be operated as a stand- alone sys- tem without the need for a BMS system. Operator controls shall be mounted on the front of the enclosure and shall consist of start and stop control, bypa...
Page 19 - Inlet Flow Control Valves:; Add the following to the end of the; Equalizer Flume Weir Gates:; Sound Control; Add the following paragraph under; Inlet Sound Attenuation; Add the following paragraph under
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Options 19 Inlet Flow Control Valves: 8.2 : Add the following to the end of the paragraph: Heavy-duty flow-regulator valves shall be provided at the hot water inlet connections. These valves shall be disc-...
Page 20 - Outlet Sound Attenuation; Low Noise Fan
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Options 20 box which is self supporting. The inlet attenuation will not be allowed to impact the thermal performance effi- ciency of the basic tower configuration. Outlet Sound Attenuation 1.4 Add the foll...
Page 21 - Single Hot Water Inlet Connection; Replace this paragraph with the
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Options 21 Ultra Low-Noise Fan 1.4 Replace paragraph 6.1 with the fol- lowing: Fan(s) shall be propeller-type, incorporating wide-chord forward- swept FRP blades and galvanized hubs. Blades shall be indivi...
Page 22 - Multicell Basin Equalizer Outlets:; Basin Sweeper Piping:; Extended Geareducer Lube Line
Specifications Specification Value Marley / NC Class Stainless Cooling Tower / Specifications: Options 22 ______ psf, as well as a ______ seismic load. The fan deck and hot water basin covers shall be designed for 50 psf live load or a 200 lb. concentrated load. Guardrails, where specified, shall be...
