E N G I N E E R I N G DATA A N D S P E C I F I CAT I O N S Marley MH FLU I D COOLE R
MH Fluid Cooler — Table of Contents Engineering Data Schematic – Single-Flow Models_____________________________________________________ 4 Schematic – Double-Flow Models____________________________________________________ 5 Support__________________________________________________________________________ 6 Freeze Prevention_________________________________________________________________ 7 Water Quality_____________________________________________________________________ 8 Specifications / Base Base________
MH Fluid Cooler The Marley MH Fluid Cooler is one of the most efficient closed-circuit heat rejection products on the market—and your best choice for industrial and HVAC applications. By keeping the process fluid in a clean, closed loop, and combining the function of a cooling tower and heat exchanger into one system, the MH Fluid Cooler can provide superior operational and maintenance benefits.
MH Fluid Cooler — Engineering Data: Schematic 4 Use this data for preliminary layouts only. Obtain current drawing from your Marley sales representative. UPDATE™ web-based selection software, available at spxcooling.com/update provides MH Fluid Cooler model recommendations based on customer's specific design requirements.
MH Fluid Cooler — Engineering Data: Schematic 5 Use this data for preliminary layouts only. Obtain current drawing from your Marley sales representative. UPDATE™ web-based selection software, available at spxcooling.com/update provides MH Fluid Cooler model recommendations based on customer's specific design requirements.
MH Fluid Cooler — Engineering Data: Support 6 AIR INLET FACE AIR INLET FACE AIR INLET FACE CL ANCHOR BOLT ANCHOR BOLT CL ANCHOR BOLT CL CL ANCHOR BOLT D 3 1/2" SINGLE-FLOW MODELS ANCHOR BOLT CL CL ANCHOR BOLT 3 1/2" D ANCHOR BOLT CL CL ANCHOR BOLT D 3 1/2" DOUBLE-FLOW MODELS Maximum Deflection Model D ⁄8" MHF706 11'-31⁄8" 1 ⁄8" MHF707 12'-31⁄8" 1 Model D MHF7103 8'-2" 3 MHF7105 8'-2" 3 MHF7107 11'-9" 1 MHF705 11'-9" 1 Maximum Deflection ⁄2" ⁄2" ⁄2" ⁄2" Use this da
MH Fluid Cooler — Engineering Data: Freeze Prevention Fluid Cooler Coil Fluid Cooling Recirculating Water When the ambient temperature falls below 32°F, heat loss from the coil be substantial even without recirculating water flowing over the coil. The process fluid, without an applied heat load, may be prone to freezing. There are various methods to protect against coil freezing. When the ambient air temperature falls below 32°F, the recirculating water within the fluid cooler can freeze.
MH Fluid Cooler — Engineering Data: Water Quality SYSTEM CLEANLINESS Water Treatment The MH Fluid Cooler can be a very effective air washer. Atmospheric dust able to pass through the relatively small louver openings will enter the recirculating water system. Increased concentrations can intensify systems maintenance by clogging screens and strainers—and smaller particulates can coat system heat transfer surfaces.
MH Fluid Cooler — Specifications: Base Specifications 1.0 Base: 1.1 Provide an induced-draft, crossflow-type, factory assembled, galvanized steel, closed circuit fluid cooler. Unit shall consist of _____ cell(s), as shown on plans. The limiting overall dimensions of the fluid cooler shall be _____ wide, _____ long, and _____ high to the top of the fan guard. Total operating horsepower of all fans shall not exceed _____ hp. Fluid cooler shall be similar and equal in all respects to Marley Model _______.
MH Fluid Cooler — Specifications: Base Specifications 10 Specification Value 3.0 Performance Warranty: 3.1 CTI Certification notwithstanding, the fluid cooler manufacturer shall guarantee that the fluid cooler supplied will meet the specified performance conditions when the fluid cooler is installed according to plans.
MH Fluid Cooler — Specifications: Base Specifications 11 Specification Value 6.0 Construction: 6.1 Except where otherwise specified, all components of the fluid cooler shall be fabricated of heavy-gauge steel, protected against corrosion by G-235 galvanizing. After passivation of the galvanized steel (8 weeks at pH 7-8, and calcium hardness and alkalinity at 100-300 ppm each), the fluid cooler shall be capable of withstanding water having a pH of 6.5 to 9.
MH Fluid Cooler — Specifications: Base Specifications 12 Specification Value blades attached to galvanized steel hubs with U-bolts. Blades shall be individually adjustable. Fan(s) shall be driven through a right angle, industrial duty, oil lubricated, geared speed reducer that requires no oil changes for the first five (5) years of operation. All gearbox bearings shall be rated at an L10A service life of 100,000 hours or greater and the gear sets shall have AGMA Quality Class of 9 or greater.
MH Fluid Cooler — Specifications: Base Specifications 8.2 Coil air-inlet louvers shall be a minimum of 0'-5" air travel, triple-pass PVC to limit water splash out and prevent direct sunlight from entering the collection basin. PVC louvers shall be easily removable for access to the coil(s). Louvers with less than three changes in air direction are unacceptable. 8.3 Drift eliminators shall be heavy duty PVC with a minimum of three changes in air direction, and shall limit drift losses to 0.
MH Fluid Cooler — Specifications: Base Specifications 11.0 Access: 11.1 A large galvanized steel, rectangular access door shall be located on both endwalls for entry into the cold water basin and fan plenum area. Access doors shall be a minimum of 24" wide and 42" tall and shall be operable from inside as well as outside of the fluid cooler. 12.0 Collection Basin: 12.1 The collection basin shall be G-235 heavy-gauge galvanized steel assembled with bolted connections. Tap screws shall not be allowed.
MH Fluid Cooler — Specifications: Options Specifications 15 Specification Value Stainless Steel Options All Stainless Steel Fluid Cooler: 1.1: Replace paragraph 1.1 with the following: Provide an induced-draft, crossflowtype, factory assembled, stainless steel, closed circuit fluid cooler. Unit shall consist of _____ cell(s), as shown on plans. The limiting overall dimensions of the fluid cooler shall be _____ wide, _____ long, and _____ high to the top of the fan guard.
MH Fluid Cooler — Specifications: Options Specifications Stainless Steel Distribution Basin: 9.1 Replace paragraph 9.1 with the following: An open 301L stainless steel basin above the fill with removable interchangeable polypropylene nozzles installed in the floor of the basin shall provide full coverage of the fill by gravity flow. The basin components shall be installed and sealed at the factory and connected with bolted connections. Tap screws shall not be allowed.
MH Fluid Cooler — Specifications: Options Specifications 17 Specification Value ing. The guardrail assembly shall be hot dipped galvanized after welding and capable of withstanding a 200 lb concentrated live load in any direction. Posts shall be spaced on centers of 8'-0" or less. A 1'-6" wide aluminum ladder with 3" I-beam side rails and 1.25" diameter rungs shall be permanently attached to the endwall casing of the tower, rising from the base of the fluid cooler to the top of the guardrail.
MH Fluid Cooler — Specifications: Options Specifications Ladder Safety Gate: 11.3 Add the following paragraph in the Access section: A steel, self-closing gate shall be provided at the guardrail level of the ladder. Access Door Platform: 11.
MH Fluid Cooler — Specifications: Options Specifications 19 Specification Value Control Options Combination Fan and Pump Motor Starter Control Panel: 6.4 Add the following paragraph in the Mechanical Equipment section: Each cell of the fluid cooler shall be equipped with a UL / CUL 508 listed control panel in a NEMA 3R outdoor enclosure designed specifically for fluid cooler applications.
MH Fluid Cooler — Specifications: Options Specifications 20 Specification Value selector switch shall be provided. Dry status contacts wired to user terminal points indicating typical alarm and status events shall be provided. Two safety circuits for the spray pump, low water cut off preventing a dry run pump and a pump shut down upon approaching freezing temperatures in the cold water basin shall be provided.
MH Fluid Cooler — Specifications: Options Specifications Water Level Control System: 11.2 Add the following paragraph in the Cold Water Basin section: Provide a water level control system including a NEMA 4X control panel, water level probes and probe stilling chamber. The control system shall monitor the water level in the coldwater basin to determine level events used for cold-water make-up, high and low alarms and/or pump shut down.
MH Fluid Cooler — Specifications: Options Specifications cold-water temperature. As an option to receiving the speed reference signal from a building management system, the drive must have the capability to receive a 4-20 mA temperature signal from an RTD transmitter. When using an RTD for temperature monitoring and speed control the VFD shall have an internal PI regulator to modulate fan speed maintaining set point temperature.
MH Fluid Cooler — Specifications: Options Specifications shall be provided for voltage isolation during VFD maintenance. An integrated full voltage non-reversing bypass starter shall be furnished allowing fan motor operation if VFD has failed. In the event of a system fault the VFD program logic shall evaluate type of fault determining if safe to automatically transfer fan motor to the bypass starter. Automatic bypass with an earth ground condition shall not be allowed.
MH Fluid Cooler — Specifications: Options Specifications 24 Specification Value Miscellaneous Options Positive Closure Dampers: 4.2 Add the following paragraph in the Coil section: Provide positive closure actuating dampers to prevent air from flowing through the coil section when the dampers are closed. All linkage and axles shall be stainless steel and the blade bearings shall be corrosion resistant, molded synthetic bearings. Damper blades shall be single-skin constructed from G60 galvanized steel.
MH Fluid Cooler — Specifications: Options Specifications Air Inlet Screens: 8.4 Add the following paragraph: The air inlet faces of the top module fill area of the fluid cooler shall be covered by 1" mesh hot dip galvanized welded wire screens. Screens shall be mounted in galvanized steel U-edging and shall be removable. FM Approval: 6.
MH Fluid Cooler — Specifications: Options Specifications Specification Value Sound Control: 1.2 Add the following paragraph in the Base section: The closed circuit fluid cooler shall be designed for quiet operation, and shall produce an overall level of sound not higher than the overall dB(A) values shown in the following table when measured at a distance of ____ ft.
MH Fluid Cooler — Specifications: Options Specifications 27 Specification Value requires no oil changes for the first five (5) years of operation. The gearbox bearings shall be rated at an L10A service life of 100,000 hours or greater. The gear sets shall have AGMA Quality Class of 9 or greater. Ultra Quiet Fan: MHF7107 only. 7.1 Replace paragraph 7.
Marley MH fluid cooler E N G I N E E R I N G DATA A N D S P E C I F I CAT I O N S S PX C O O L I N G T E C H N O LO G I E S , I N C . 7401 WEST 129 STREET OVERLAND PARK, KANSAS 66213 USA P: 913 664 7400 F: 913 664 7439 spxcooling@spx.com spxcooling.
