Assessments - 3, GPA: 4.3
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See page 11. Bottom-Outlet Sump Square-plan galvanized steel sump with bottom outlet. Outlet connection is a hole and bolt circle conforming to 125# ASME pipe connection. Includes a plugged drain connection in sump bottom. Extended Columns for Deep Collection Basin Interior tower columns can be extended to permit concrete basin depth of up to 5’-6”. Some exceptions apply, so consult your Marley sales representative Fan Cylinder Extensions Optional flared fan cylinder extensions improve fan efficiency to reduce your operating costs. Extensions on Sigma 1000 Series towers conform to OSHA requirements without fan guards. Cell Partitions Extra partitions between fan cells for specific operating considerations. See page 9. Vibration Limit Switch Robertshaw or Metrix single-pole, double-throw vibration switches in NEMA 4 housing. Double- pole, double-throw models are also available. Oil Level Sight Glass A brass-fitted oil level sight glass takes the place of the dip stick on the external oil fill and drain system. Permits easy reading of oil level and also lets you change oil through the lube line. Air Inlet Screens Galvanized wire mesh screens over the air inlets keep leaves and trash out of the tower. Easily removable. Choose either treated fir frames or galvanized steel U-edge frames. Plywood Distribution Basin Covers Removable, treated fir plywood covers keep upper basins free of leaves and debris. They also tend to retard growth of algae by keeping ultraviolet radiation away from the warm water in the basins. Covers may be used as a working surface for tower maintenance. Accessory Description and Remarks Additional Access Door Extra access door on single-cell towers offers easy access through either endwall. Wood Stairway Pressure-treated Douglas fir 45° stairway located at tower endwall provides access to the fan deck. Choose a stairway in place of one endwall ladder, or use both ladders as well as the stairway. Handrails and kneerails are standard, so design conforms to OSHA standards. Steel Ladder Galvanized steel ladder conforms to OSHA standards. May be in place of or in addition to standard aluminum ladders. Ladder Safety Cage Galvanized steel circular framework, bolts to ladder siderails and conforms to OSHA standards. Cages extend from the top of the guardrail to about 7’ above the base of the ladder. If the tower fan deck is more than 20' above roof or grade, OSHA requires safety cages. Plenum Walkway Pressure-treated Douglas fir plenum walkways extend the full length of the tower from access door to access door above the water line. Guardrails are optional. However, OSHA requires guardrails if the walkway is 4'-0" or more above the basin floor. Ladder Extensions Used when tower is elevated appreciably above working level. Extensions attach to the normal ladder and may require base anchorage (depending on length). Premium Hardware Choose from several corrosion-resistant hardware options, providing different degrees of protection. Fire Protection Sprinkler systems and overlay materials let you choose from a range of fire protection options. See page 10. Redwood Fan Deck, You can choose redwood instead of Douglas fir Distribution Basin, or for any or all of these tower elements. Tower Structure 8 Cell Partition Options Every Sigma tower includes plenum chamber partitions and hot water distribution basin partitions between adjacent cells. Plenum partitions ensure consistent thermal performance as you shut off one fan at a time. They keep air from entering an operating cell through an adjacent idle fan, maintaining efficient thermal performance. Basin partitions let you inspect and clean individual basins while the rest of the tower continues to operate. Specify extra partitions carefully because excess partitions can sometimes discourage routine maintenance and good housekeeping procedures. Two options are available to meet specific design goals: • Fill area partitions are available, but usually not necessary. The solid sheet design of film fill prevents water and air migration between the fill areas of adjacent cells, regardless of operating mode. • Complete watertight partitions provide total cell isolation. These partitions let you use adjacent cells to serve separate loads with incompatible system temperatures. Watertight partitions extend from louver- face to louver-face and cover the full internal height of the tower, including the cold water basin. Partitions usually consist of exterior grade, pressure-treated fir plywood, sealed to cold water basin partitions made from the same material as the basin sides. For concrete basin partitions, design drawings are available that specify the appropriate Marley dimensions. Optional weir gates in wood basin partitions let you mix or segregate the water in the basin to meet your operating needs. Marley weir gates come with removable cover plates. / Available Options / Wood Stairway with Access Platform Oil-Level Sight Glass 9 / Special Component Options /...
Este manual também é adequado para os modelos :Fans - Marley Sigma Wood CoolingTower 1200 (1.13 mb)