SPX MHF702 - Manuals

6 The fluid cooler must be located at such distance and direction to avoid the possibility of contaminated fluid cooler discharge air be-ing drawn into building fresh air intake ducts. The purchaser should obtain the services of a Licensed Professional Engineer or Registered Architect to certify tha...

7 Hoisting clips are provided for ease of unloading and positioning the fluid cooler. For overhead lifts or where additional safety is required, safety slings should also be placed under the fluid cooler modules. Under no circumstances should you combine the top and bottom modules of modular models ...

8 Fasteners and components provided by others that are to be attached to the tower must be compatible with the cooling tower materials—i.e. fasteners in a stainless steel cold water basin must be stainless steel. 6. Attach process fluid supply and return piping to the coil. Field piping connection i...

9 • Do not start the motor more than six times per hour. Short cycling the tower will cause fuses, breakers or O.L.s to operate and will decrease motor life. When using a two-speed starter: • Motor rotation must be the same at slow speed and high speed.• Single winding motor requires a starter with ...

11 Mechanical Equipment: The fluid cooler is designed to operate at full speed and half speed. Warranty is void if the tower is operated at speeds which cause damaging vibrations to the tower and associated equipment. When utilizing a variable frequency drive, the tower must be tested across the ful...

12 It is essential that the fan cylinder and fan guard be installed in ac-cordance with the drawings shipped with the tower. Do not force the fan cylinder out of round. 4. Momentarily bump (energize) the motor(s) and observe rotation of the fan(s). If rotation is backwards, shut off the fan and reve...

13 Fluid Cooler Start-Up Among other sources, outbreaks of Legionnaires’ Disease have report-edly been traced to cooling towers and fluid coolers. Maintenance and water treatment procedures that prevent amplification and dissemina-tion of Legionella and other airborne bacteria should be formulated a...

15 Fluid Cooler Operation general: The cold process fluid temperature obtained from an operating fluid cooler will vary with the following influences: 1. Heat load: With the fan in full operation, if the heat load increases, the cold process fluid temperature will rise. If the heat load reduces, the...

16 4. air flow rate: Reducing air flow through the fluid cooler causes the cold process fluid temperature to rise. This is the recommended method by which to control leaving process fluid temperature. If your fluid cooler is equipped with a single-speed motor, the motor may be shut off when the proc...

17 Slushy, transitory ice forms routinely in the colder regions of the fill of low temperature towers, and is visible through the tower louvers. Such ice normally has no adverse effect on fluid cooler operation, but its appearance should be a signal to the operator to undertake ice control procedure...

18 Reversal may be at either full or half speed; however, reversal at half speed is recommended. Reverse operation of the fan should be used sparingly and should only be used to control ice, not to prevent it. Reverse fan operation should not need to exceed 1 or 2 minutes. Monitor-ing is required to...

19 When the use of industrial antifreeze solutions is not possible, the system must be operated to meet both of the following conditions. 1. Maintain sufficient flow rate through the coil. 2. Maintain sufficient heat load on the process fluid. Fluid exiting the coil must be maintained at or above 7°...

20 Water Treatment and Blowdown Maintaining Water Quality: The steel used in MH Fluid Cooler's has been galvanized with a heavy zinc coating averaging .051mm in thickness. Other materials used (PVC fill, drift eliminators, and louvers, aluminum fans, cast iron Geareducer, etc.) are selected to offer...

21 Fluid Cooler Cleaning: Any evaporative-type fluid cooler must be thoroughly cleaned on a regular basis to minimize the growth of bacteria, including Legionella Pneumophila, to avoid the risk of sickness or death. Service personnel must wear proper personal protective equipment during decontami-na...

22 (percent of flow) required to maintain different concentrations with various cooling ranges*: * Range = Difference between hot water temperature and cold water temperature. EXaMPLE: 44.2 L/s circulating rate, 10°C cooling range. To maintain 4 concentrations, the required blowdown is 0.467% or .00...

23 Maintenance See Figure 3 for MH Fluid Cooler models MHF706 and MHF707.The belts are adjusted by turning the threaded rod. Before tightening or loosening the belt, the double nuts holding the motor support in place must be loosened.There are two jam nuts at the end of the rod next to the casing. T...

24 Maintenance sion is the lowest tension at which the belt will not slip under peak load conditions. Check tension frequently during the first 24-48 hours of run-in operation. Overtensioning shortens belt and bearing life. Keep belts free from foreign material which may cause slipping. Never apply ...

25 Fluid Cooler Maintenance Some maintenance procedures may require maintenance personnel to enter the fluid cooler. Each cased face of the fluid cooler has a door for access to the interior of the tower. The optional fan deck ladder—models MHF706 and MHF707— is de-signed and intended solely for per...

27 Clean and disinfect cooling tower with biocides. Systems with biofouling, high general bacterial counts, or positive cultures of legionella may require additional cleaning. Refer to “Fluid Cooler Cleaning” section—page 21. Consult your water treatment expert as to prudent biological evaluation te...

28 wire. 3. Insert grease fittings in grease fill openings and add grease until grease is forced out through relief openings. 4. Replace fill plugs and operate mechanical equipment 30 minutes to one hour to purge excess grease at grease relief opening. 5. Reinstall grease relief plugs and reinstall ...

29 Maintenance bright metal can be exposed by cleaning, consider that the galvanizing has remained effective. Unless there is evidence of a generalized failure of the galvanizing, localized touch-up should be all that is required. To the extent that the galvanizing (zinc coating) still exists, paint...

30 representative for additional information. SPX Cooling Technologies Services Our interest in your MH Fluid Cooler does not end with the sale. Having conceived, designed, and manufactured the most reliable and longest-lasting fluid cooler of its class, we want to make sure that you gain the maximu...

31 Maintenance Schedule Maintenance Service Monthly Semi-annually Seasonal Startup or annually Inspect General Condition and Operation x x Observe Operation of: Mechanical–motor, fan and drive mechanism x x Makeup valve (if equipped) x x Inspect for unusual noise or vibration x x inspect and Clean: ...

32 Troubleshooting Trouble Cause remedy Motor will not start Power not available at motor terminals Check power at starter. Correct any bad connections between the control apparatus and the motor. Check starter contacts and control circuit. Reset overloads, close contacts, reset tripped switches or ...

34 Additional Information the norm. This service is not intended to replace the important function performed by your maintenance staff. Their attention assures the fluid coolers’s routine operating performance, and is invaluable. However, we recognize that the unusual manner in which a fluid cooler ...