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Summary of Contents for Marley Primus P11
- Page 1 ® User Manual Models P11 through P15 Manual 04-131...
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Page 2: Table Of Contents
Sheave Alignment ................31 Schedule of Tower Maintenance ............31 Seasonal Shutdown Instructions ............33 Prolonged Shutdown ................34 Marley Services ................... 35 Maintenance Schedule ................ 36 Troubleshooting ................... 37 The following defined terms are used throughout this manual to bri attention to the presence of hazards of various risk levels, or to important information concerning the life of the product. - Page 3 The location and orientation of the cooling tower can affect the safety of those responsible for installing, operating or maintaining the tower. However, since Marley does not determine the location or orientation of the tower, we cannot be responsible for addressing those safety issues that are affected by the tower’s location or orientation.
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Page 4: Tower Location
Those are only some of the safety issues that may arise in the design ▲ ▲ ▲ Note process. Marley strongly recommends that you consult a safety engineer to be sure that all safety considerations have been addressed. Tower Location Space available around the tower should be as generous as possible to promote ease of maintenance—and to permit freedom of airflow into and... -
Page 5: Tower Shipment
Receiving and Hoisting Tower Shipment Unless otherwise specified, Primus towers ship by truck (on flat bed trailers), which lets you receive, hoist, and install the tower in one continuous operation. Single-cell towers ship on one truck. Multicell towers, depending on the quantity, may require more than one truck. Responsibility for the condition of the tower upon its arrival belongs to the trucker—as does the coordination of multiple shipments, if required. -
Page 6: Tower Installation
1. Prior to placement of the tower, confirm that the supporting platform is level, and that the anchor bolt holes are correctly located in accordance with Marley literature. 2. Place tower on your prepared supports, aligning anchor bolt holes with those in your supporting steel. - Page 7 The typical attachment of customer piping for bottom outlet or equalizer with flange connection using gasket (supplied by Marley) is shown in Figure1. Sealing washers (by others) required at bolt connections inside basin. The tower is not designed to support additional piping loads.
- Page 8 Installation UNBOLT AND REINSTALL Figure 1A COVER PLATE TRASH SCREEN Figure 1B 5. Attach makeup water supply piping to the float valve connection. Install the float ball and stem. If you wish to pipe overflow and drain water to a remote discharge point, make those connections at this time.
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Page 9: Field Installed Mechanical Equipment
7. Wire motor in accordance with wiring diagram on motor nameplate. Check motor connections and power supply voltage versus motor nameplate voltage. 8. Install fan guard using ³⁄₈" tap screws provided. For maintenance/safety purposes, Marley recommends a lockout ▲ ▲ ▲ Warning type disconnect switch for all mechanical equipment. - Page 10 Installation Figure 2 2. Install motor assembly on tower cross beams as shown in Figure 2 and Detail A. Leave bolts loose enough to allow for fan centering adjustment. " 1" BOLT 3 PLACES BRACKET FLAT WASHER MOTOR LOCK WASHER FLAT WASHER DETAIL A ➠...
- Page 11 Installation 3. Install the fan bushing loosely in the fan and install the fan assembly onto the motor shaft. Install motor key. See Detail B and Figure 2. Bushing is to be flush with the end of the motor shaft. Tighten bushing bolts.
- Page 12 Installation Field Installed Motor—Belt Drive Models 1. Install brackets and motor plate to motor as shown in Assembly Details. Install sheave (and bushing models P13 through P15) to motor shaft. Leave sheave loose enough to allow for sheave adjustment later. If present, remove drain plugs from the bottom of the motor on the end opposite of shaft.
- Page 13 Installation MOTOR KEY MOTOR SHEAVE BUSHING " 6" ALLTHREAD BOLT " 1" BOLT MOTOR SHEAVE BRACKET MOTOR LOCK WASHER BRACKET MOTOR PLATE MOTOR BOLT (SIZE VARIES) JAM NUT ASSEMBLY DETAILS MODELS P13 THROUGH P15 2. Install motor assembly on tower cross beams as shown in Figure 3. Slide toward the fan shaft assembly.
- Page 14 Installation 4. Install belts on the lowest set of grooves. Slide the motor assembly away from fan shaft and to remove belt slack and install bolts in tower cross beams. Do not tighten at this time. Install the 6″ all-thread bolt on the motor plate and adjusting clip as shown in the Assembly Details and Figure 3 or Figure 3A.
- Page 15 Installation " 1" BOLT 4 PLACES FAN SHAFT " 6" ALLTHREAD BOLT JAM NUT LOCK WASHER ADJUSTING CLIP TENSIONING NUT Figure 3A Model P13-P15...
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Page 16: Vibration Switch Option
Installation Vibration Switch 1. Install vibration to the inside of the tower cross beam as shown. Refer to instructions that ship with the vibration switch for wiring information. " " ALL THREAD BOLT WASHER LOCK WASHER VIBRATION SWITCH Basin Heater All basing heater components must be field installed and wired by others. - Page 17 Installation 1. Field drill an 1¹⁄₈" hole in location shown and install control probe in the bulkhead fitting. Use pipe joint compound on threads. 2. Install heater element as shown in Figure 4. 3. Attach heater support as shown in Figure 4. 4.
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Page 18: Tower Start-Up
Operation Tower Start-Up Among other sources, outbreaks of Legionnaires’ Disease have ▲ ▲ ▲ Warning reportedly been traced to cooling towers. Maintenance and water treatment procedures that prevent amplification and dissemination of Legionella and other airborne bacteria should be formulated and implemented BEFORE systems are operated and continued regularly thereafter to avoid the risk of sickness or death. - Page 19 5. Uniform distribution basin depth of 2³⁄₄″ to 5¹⁄₂″ (70 mm to 140 mm) is essential to efficient tower operation. Contact your Marley sales representative if you are considering a permanent change in circulating water flow rate that would prevent operation within these limits.
- Page 20 Operation Mechanical Equipment: Always shut off electrical power to the tower fan motor prior to ▲ ▲ ▲ Warning performing any maintenance on the tower. Any electrical switches should be locked out and tagged out to prevent others from turning the power back on.
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Page 21: Tower Operation
Operation If the water supply system is not being operated—or if there is no heat ▲ ▲ ▲ Note load on the system—motor amps read at this time may indicate an apparent overload of as much as 10–20%. This is because of the increased density of unheated air flowing through the fan. - Page 22 If your tower consists of two or more cells, cycling of motors may be shared between cells, increasing your steps of operation accordingly. For greater insight on cold water temperature control, please read “Cooling Tower Energy and its Management,” Marley Technical Report #H-001-A , available from your Marley sales representative.
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Page 23: Winter Operation
Operation Wintertime Operation: The Marley fill system used in the Primus cooling tower has air entrance louvers that are molded integrally as part of the fill. This feature makes these towers very forgiving of cold weather operation, even at the low temperature and reduced load conditions encountered in free cooling and other low temperature applications. - Page 24 This forces warm air out through the louvers, melting any accumulated ice—adequate heat load must be available. Reversal may be at either full or half speed; however, Marley recommends reversal at half speed. Reverse operation of the fan should be used sparingly and should only be used to control ice, not to prevent it.
- Page 25 If a bypass is used, all water must be bypassed without modulation. If the water bypass is directly into the tower's cold water basin, its design must be approved by Marley Engineers. Intermittent Wintertime Operation: If periods of shutdown (nights, weekends, etc.) occur during freezing weather, measures must be taken to prevent the water in the cold water basin—and all exposed pipework—from freezing.
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Page 26: Tower Cleaning, Water Treatment And Blowdown
System. This removes the requirement for other chemical feed systems and provides significant water savings. For complete information, contact your local Marley office or representative. • Chlorine (if used) shall be added intermittently, with a free residual not to exceed 1 ppm—maintained for short periods. Excessive chlorine levels may deteriorate sealants and other materials of construction. -
Page 27: Cleaning
Maintenance The structure of your Primus consists primarily of galvanized steel, ▲ ▲ ▲ Note therefore your water treatment program must be compatible with zinc. In working with your water treatment supplier, it is important that you recognize the potential effects on zinc of the specific treatment program you choose. - Page 28 Maintenance In order to achieve water quality which is acceptable to the cooling tower (as well as the remainder of your circulating water system), the selected water treatment company must work from a relatively constant level of concentrations. This stabilization of contaminant concentrations is usually accomplished by blowdown , which is the constant discharge of a portion of the circulating water to waste.
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Page 29: Belt Replacement
Maintenance Belt Replacement Always shut off electrical power to the tower fan motor prior to ▲ ▲ ▲ Warning performing any maintenance on the tower. Any electrical switches should be locked out and tagged out to prevent others from turning the power back on. -
Page 30: Belt Tensioning
Maintenance BEARING BELT BEARING 8. Align and level sheaves, and tension belts. DO NOT OVER TENSION. Tighten jam nut on tensioning bolt. 9. Tighten all bolts and apply Loctite 242 to all fasteners. Do not apply to tensioning nut or bushing hardware. Belt Tensioning Belt Drive Models The belts are adjusted by turning the adjusting-bolt nut at the motor support. -
Page 31: Sheave Alignment
Maintenance Sheave Alignment Belt Drive Models • The fan sheave position is set at the factory. • The fan sheave may have grooves that are not used. The bottom surface of the motor and fan sheaves must be aligned within ¹⁄₁₆" of each other and level within ¹⁄₂°... - Page 32 Maintenance Included with this instruction packet are separate User Manuals on each major operating component of the tower, and it is recommended that you read them thoroughly. Where discrepancies may exist, the separate User Manuals will take precedence. The following is recommended as a minimum routine of scheduled maintenance: Always shut off electrical power to the tower fan motor prior to ▲...
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Page 33: Seasonal Shutdown Instructions
Maintenance Every 2 months: Lubricate fan shaft bearings. While rotating equipment by hand, grease the bearings until a bead forms around the seals—a maximum charge of 0.55 ounces is recommended. Chevron SRI-2 grease is recommended. Annually: Relubricate motor. Refer to motor manufacturer’s recommendations. -
Page 34: Prolonged Shutdown
Marley Electric Motor User Manual 92-1475. At start of new operating season, make sure bearings are adequately lubricated before returning motor to service. Prolonged Shutdown If shutdown period is longer than seasonal, contact your Marley sales engineer for additional information. -
Page 35: Marley Services
Additional Information Marley Services Marley’s interest in your Primus cooling tower does not end with the sale. Having conceived, designed, and manufactured the most reliable and longest-lasting cooling tower of its class, we want to make sure that you gain the maximum possible benefit from its purchase. -
Page 36: Maintenance Schedule
Maintenance Schedule l a i t f i s t l s t l s t l s t l i n i... -
Page 37: Troubleshooting
Troubleshooting • o i t • r i c . t i a l i e l i • l l a c r i t i u o i t o i t o i t l l i a t l . - Page 38 Troubleshooting l l a s t l l l a s t l l l a . t i c t i t i s d l i l i t n i l n i l s t l c i f "...
- Page 40 7401 W. 129 Street // Overland Park, KS USA 66213 // 800 462 7539 // info@marleyct.spx.com // www.marleyct.com In the interest of technological progress, all products are subject to design an/or material change without notice. ©2004 Marley Cooling Technologies, Inc. | Printed in USA...
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