FOR YOUR SAFETY IMPORTANT WARNING
Contents
1. 5 588 3 SERVICE amp TROUBLESHOOTING SERVICE amp TROUBLESHOOTING A WARNING When servicing or repairing this equipment use only factory approved service replacement parts A complete replacement parts list may be obtained by contacting Modine Manufacturing Company Refer to the rating plate on the unit for complete unit model number serial number and company address Any substitution of parts or controls not approved by the factory will be at the owner s risk 2 Disconnect power supply before making wiring connections CAUTION Any original factory wiring that requires replacement must be replaced with wiring material having a temperature rating of at least 105 C IMPORTANT To check most of the Possible Remedies in the to prevent electrical shock and equipment damage 3 Do not submerse the pump motor in water The evaporative cooler pump motor is not submersible Table 9 1 Troubleshooting troubleshooting guide listed in Table 9 1 refer to the applicable sections of the manual Possible Cause Possible Remed Tank does not fill or remain filled Pump does not run when system switch is placed in the cooling mode Tank is full Media has dry spots Main water supply valve is not open Optional fill valve does not open Float valve stuck in closed position Drain or overflow leaking Tank leaking System does not have power Opt time clock in unoccupied mode2. Thermostat not calling for cooling Float Switch is not contacting Defective pump Insufficient water flow rate Distribution line blocked Open main water supply valve Check wiring to fill valve Replace valve if necessary Check adjust float valve Check piping for leaks Tighten if necessary Check tank for leaks Silicone if necessary Check supply power and control transformer Set time clock to occupied mode Set thermostat above discharge temp Check adjust float switch Replace pump See Media Water Flow Adjustment Check the distribution line for obstructions Water dripping off media Excessive water flow Worn or dirty media See Media Water Flow Adjustment Clean or replace media Water blowing off media Excessive water flow Media installed incorrectly Air velocity to high Worn or damaged media See Media Water Flow Adjustment See Media Replacement Adjust blower speed below Max cooling CFM See Performance Data Replace media Media contains debris and scale Bleed line clogged Bleed line not adjusted 5 588 3 Check the distribution line for obstructions See Bleed Line Adjustment MODEL NOMENCLATURE SPECIFICATIONS Model Nomenclature for Evaporative Coolers Refer to Literature 5 572 or AIR 5 572 Installation and Service Manual for complete Model Nomenclature descriptions Digit 22 of the Model Number Located on the Model Identification plate def
3. tereti gk adas r d aa 2 SI Metric Conversion Factors sese 2 Unit EO CANOM ER Unit LIMINO D L Unit Installati n 32 Ge aidan E ie Unit Leveling Water Supply Drain and Overflow Connections 3 Electrical Connections essen 4 Start Up Procedure enice skat s asie at 4 Bleed Adjustment eese 4 Media Water Flow Adjustment aida 5 Control Operating Sequence sees 5 Option amp Accessory Control Devices sssssseeee 6 Dimensions Weight and Performance Data 7 Mulier EE 8 Media Replacement seen 8 Service amp Troubleshooting eee 9 Model Nomenclature for Evaporative Coolers 10 Media and Pump Motor Specifications ss 10 Table 2 1 SI Metric Conversion Factors To Convert To Obtain W C inches water column psig 6 893 subtract 32 and then multiply by 0 555 inches 25 4 Multiply By 0 24 F meters m min m min btu ft pound 0 0374 0 453 btu hr 0 000293 gallons liters UNIT LOCATION RECOMMENDATIONS 1 When the unit is equipped with an evaporative cooler the module is factory installed and wired Refer to Literature 5 572 or AIR5 572 Installation and Service Manual for recommendations 2 When locating t
4. Over MR E e w 3 00 e 4 Optional 1 Pre Filter Rack m 1 we lt 1 50 1 25 gt 4 50 Side View Blower Section 36 00 Pall a 4 gt 6 or12 lt Media H 1 2 NPT Water Inlet U Esot os 3o 5 Leveling Legs 2558 Table 7 1 Evaporative Cooler Dimensional Performance and Weight Data All dimensions in inches 6 Media 12 Media Face Velocity Digit 23 3 5 A or C Digit 23 4 6 B or D Blower Type Maximum Media Face at Max CFM Dry Operating Dry Operating Digit 16 Cooling CFM Area ft ft min Weight Weight Weight Weight 75 All 100 125 All 150 175 All 200 225 All 250 300 E F G or H 250 300 I J orK 350 400 E F G or H 350 400 I J or K 500 600 G or H 500 600 I J KorL 700 800 G or H 700 800 I J KorL 840 960 I J KorL D All weights in pounds 5 588 3 7 MAINTENANCE MAINTENANCE The evaporative cooling unit should be serviced before each heating cooling season to assure proper operations The following items may be required to have more frequent service schedule based on the environment in which the unit is installed and the frequency of the equipment operation Water Tank Flushing Clean the water tank of the evaporative cooling unit by flushing it out weekly with fresh water Refill the tank and adjust the float valve so that the water level will be up t
5. building drain line Figure 3 2 Field Supplied Evap Cooler Piping RECOMMENDED HOSE BIBB WITH ANTI SIPHON Uu VACUUM BREAKER FOR 5 EOUIPMENT WASHDOWN m BY OTHERS ETE n n inp a DRAIN mh iri FILL VALVE DE ENERGIZED FILL EVAP DRAIN FILL LINE FILL VALVE ENERGIZED i s WATER INLET rem 50PSI MAX 7 DS 1 SERVICE M Q BY OTHERS 3 WAY FILL VALVE DRAIN VALVE ENERGIZED PREVENT EVAP FROM DRAINING 2 WAY DRAIN VALVE NORMALLY OPEN Ju J DRAIN VALVE DE ENERGIZED Vir DRAIN EVAP 3 WAY FILL VALVE AND 2 WAY DRAIN VALVE BY OTHERS OR FROM MODINE AS AN ACCESSORY TO DRAIN 5 588 3 3 UNIT INSTALLATION START UP PROCEDURE Electrical Connections Refer to Literature 5 572 or AIR5 572 Installation and Service Manual for electrical installation instructions and unit amp draws The evaporative cooler is factory wired Two copies of the job specific wiring diagram are provided with each unit one located in the duct furnace electrical junction box and one in the electrical section of the un
6. has reached the required level Evaporative Cooler Transformer and Fuses An evaporative cooler transformer and fuses are required for supply voltages of 208V 1Ph 208V 3Ph 460V 3Ph and 575V 3Ph Refer to Literature 5 572 or MAS5 572 Installation and Service Manual Options for locations Evaporative Cooling Thermostat The evaporative cooling duct thermostat Penn A19AAF 12 25 225 F SPDT cycles the pump motor based on a call for cooling 075 L 0 75 113 2 50 0 13 1 38 4 00 3 25 2 50 0 88 2 Way 1 38 pA gam 1 38 3 Way 2 25 in the is shipped loose for field installation in the discharge air stream Refer to the unit job specific wiring diagram for low voltage field electrical wiring connections Fill and Drain Kits Manual Remote Operated Fill and Drain Kit The manual remote fill and drain kit is used to prevent standing water in the evaporative cooling unit when not in the cooling mode The kit provides cleaning and flushing of the evaporative cooler tank each time the system is placed in the cooling mode Cleaning and flushing of the tank removes the build up of mineral deposits from the tank All fill and drain kits include low voltage 24V valves one 1 2 3 way fill valve and one 1 2 2 way drain valve for filling and draining of the evaporative cooler tank The maximum wa
7. 0 175 200 225 250 300 E F G orH 1 70 350 400 500 600 GorH 700 800 10 5 588 3 THIS PAGE INTENTIONALLY LEFT BLANK 5 588 3 Commercial Products Group Modine Manufacturing Company 1500 DeKoven Avenue Racine Wisconsin 53403 2552 H Model Series Phone 1 800 828 4328 HEAT Fax 1 800 204 6011 O Model Series Phone 1 866 823 1631 Toll Free e Fax 1 800 204 6011 Modine Manufacturing Company 2010 5 588 3 Litho in USA
8. 1 for valve sequence 7 Check the water supply for adequate flow 8 When the float valve shuts off the water supply the depth of the water should be 27 4 or 4 below the overflow If the water level requires adjustment bend the float arm to provide the proper water level 9 Check the evaporative cooler tank for leaks If any leaks are detected drain the tank and apply waterproof silicone sealer at the leaks 10 Adjust the bleed line flow rate See Bleed Line Adjustment 11 Adjust the water flow rate over the evaporative cooler media See Media Water Flow Adjustment 12 Drain the tank and repeat step 8 two more times This will flush the media of dirt obtained during shipment It will also wash away the odor on new media 13 Adjustment of the water flow rate over the media may have changed the bleed line flow rate Check and readjust if necessary 14 Replace the birdscreen Bleed Line Adjustment The recirculated water in the tank must have continual bleed to prevent an excessive concentration of mineral buildup in the tank water A high concentration of minerals will cause a buildup on the media The surface adhesion and wicking action of the media is reduced by these deposits ultimately causing small droplets of water to be carried off leaving side of the media The unit is provided with a manually adjustable bleed which will allow for continuous bleed off into the overflow connection on the tank The bleed rate requir
9. 5 588 3 5H76353A May 2010 INSTALLATION AND SERVICE MANUAL evaporative cooler model series H amp O C LISTED US 9900100 FOR YOUR SAFETY The use and storage of gasoline or other flammable vapors and liquids in open containers in the vicinity of this appliance is hazardous IMPORTANT The use of this manual is specifically A WARNING intended for a qualified installation and Improper installation adjustment alteration service agency All installation and service service or maintenance can cause property of these units must be performed by a damage injury or death and could cause qualified installation and service agency exposure to substances which have been These instructions must also be used determined by various state agencies to cause in conjunction with the Installation and cancer birth defects or other reproductive Service Manual originally shipped with harm Read the installation operating and the appliance in addition to any other maintenance instructions thoroughly before accompanying component supplier installing or servicing this equipment literature Inspection on Arrival 1 Inspect unit upon arrival In case of damage report it immediately to transportation company and your local factory sales representative 2 Check rating plate on unit to verify that power supply meets available electric power at the point of installation 3 Inspect unit upon arrival for conform
10. ance with description of product ordered including specifications where applicable THIS MANUAL IS THE PROPERTY OF THE OWNER PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN YOU LEAVE THE JOB SPECIAL PRECAUTIONS TABLE OF CONTENTS SI METRIC CONVERSION FACTORS UNIT LOCATION UNIT LIFTING SPECIAL PRECAUTIONS THE INSTALLATION AND MAINTENANCE INSTRUCTIONS IN THIS MANUAL MUST BE FOLLOWED TO PROVIDE SAFE EFFICIENT AND TROUBLE FREE OPERATION IN ADDITION PARTICULAR CARE MUST BE EXERCISED REGARDING THE SPECIAL PRECAUTIONS LISTED BELOW FAILURE TO PROPERLY ADDRESS THESE CRITICAL AREAS COULD RESULT IN PROPERTY DAMAGE OR LOSS PERSONAL INJURY OR DEATH THESE INSTRUCTIONS ARE SUBJECT TO ANY MORE RESTRICTIVE LOCAL OR NATIONAL CODES HAZARD INTENSITY LEVELS 1 DANGER Indicates an imminently hazardous situation which if not avoided WILL result in death or serious injury 2 WARNING Indicates a potentially hazardous situation which if not avoided COULD result in death or serious injury 3 CAUTION Indicates a potentially hazardous situation which if not avoided MAY result in minor or moderate injury 4 IMPORTANT Indicates a situation which if not avoided MAY result in a potential safety concern A WARNING 1 When servicing or repairing this equipment use only factory approved service replacement parts A complete replacement parts list may be obtained by contacting Modine Manufacturing Company Refer to the rating p
11. e Bleed Rate GPM can be converted to fluid ounces per minute by dividing by 0 0078125 4 5 588 3 START UP PROCEDURE CONTROL OPERATING SEQUENCE Figure 5 1 Bleed and Media Line Flow Restrictors Flow Restrictor Adjustment Screw Media Water Flow Adjustment Proper water flow over the media is important Insufficient water flow will result in increased accumulation of minerals on the media Excessive water flow will result in deterioration of the media and moisture carryover The media water flow is adjusted as follows 1 With the disconnect switch in the OFF position place a jumper wire between electrical section terminals 80 and 82 This will energize the pump motor when the power is provided to the unit 2 Use a jumper wire to energize the unit blower Refer to the unit wiring diagram to determine location required Turn on power to the unit at the disconnect switch 4 After allowing the blower and pump motor to operate for 15 minutes adjust the media line flow restrictor so that the media is damp from top to bottom on the entering air side If water flowing on the entering surface of the media is visible the water flow rate is too high and must be reduced Refer to the Approximate Evaporation Rate GPM calculated on page 3 5 Turn off power to the unit at the disconnect switch 6 Remove all jumper wires vo CONTROL OPERATING SEQUENCE The following is the sequence of operation for th
12. e unit Option and accessory control devices Float switch evaporative cooling thermostat and or fill and drain kits are included only when ordered 1 The evaporative cooler tank is filled at the beginning of the cooling season See Maintenance Water Tank Flushing For units without the Accessory Fill and Drain Kits the tank is filled by manually closing opening the valves as described in Figure 3 1 For units with Accessory Fill and Drain Kits the tank is filled each time the system switch is placed in the cooling mode Refer to Steps 3 4 5 and 14 2 The system switch is placed in the position to enable the evaporative cooler e g Summer Cool etc 3 The freeze protection thermostat if supplied must sense an outside air temperature above the set point Minimum 40 F to energize the cooling circuit 4 f an automatic time clock activated fill and drain kit is used when the time clock is in the occupied mode the SPST contact closes energizing the cooling circuit 5 The fill and drain valves accessory or by others are energized a The normally open side of the 3 way fill valve closes to prevent water from draining and the normally closed side of the fill valve opens to allow water to flow to the evaporative cooler See Figure 3 1 b The normally open side of the 2 way drain valve closes to prevent the water in the evaporative cooler from draining See Figure 3 1 6 The low voltage cooling relay which controls t
13. ed is dependent on the quality of water used and the rate of evaporation As climate conditions change the rate of evaporation may increase thereby requiring an increase in the bleed rate An indication of insufficient bleed is a uniform buildup of minerals on the entering air face of the media If this condition is observed increase the rate of bleed until the mineral deposits dissipate It is recommended that the bleed rate be set for the conditions of maximum water evaporation The bleed rate is adjusted as follows 1 With the disconnect switch in the OFF position place a jumper wire between electrical section terminals 80 and 82 This will energize the pump motor when the power is provided to the unit 2 Turn on power to the unit at the disconnect switch 3 With the pump motor running measure the amount of water through the bleed line Refer to Formula 4 1 for recommended bleed line flow rates Adjust the bleed line flow restrictor as necessary 4 Turn off power to the unit at the disconnect switch Reattach the hose clamp and bleed tube to the overflow tee 6 Remove the jumper wire between terminals 80 and 82 a Formula 4 1 Evaporative Cooler Water Bleed Rate A E tion Rate GPM Bleed Rate pprox Evaporation Rate Cycle Rate e Approx Evaporation Rate GPM was calulated on page 3 e Cycle Rate 1 5 for hard water 3 for soft water maximum or 15 for soft water minimum For ease of measurement th
14. er galvanized or copper pipe Verify that the proper water supply capacity is available by referring to the previous section Use a municipal water supply or well water which maintains a pH between 6 and 9 Do not use untreated surface water as the water supply If equipment is to be supplied with well water it is recommended that a water treatment company investigate possible requirements to control mineral deposits In certain locations even municipal water has enough minerals to warrant consideration of water treatment The water supply line must be furnished with indoor inlet and drain valves to prevent freezing and rupture when the temperature drops below 32 F See Figure 3 2 Drain Connection The drain connection is located on the bottom of the evaporative cooler See Dimensions Provide a 1 2 manual valve in the drain line to permit draining and cleaning of the evaporative cooler tank Overflow Connection The overflow connection is located on the bottom of the evaporative cooler See Dimensions When permitted by local codes the overflow connection can be left open to drain to the nearest roof drain for outdoor units This connection will have a constant water flow because it is used to drain the bleed For bleed water flow rates refer to Start up Procedure Bleed Adjustment If the constant water flow on the roof is not desired or permitted by local codes piping should be provided from the 1 2 NPT connection to the
15. he pump motor and the unit time delay relay which controls the blower operation are energized 7 If the unit was supplied with an optional float switch the float switch contact closes when the tank reaches the proper water level 8 The evaporative cooling pump motor starts 9 The time delay relay starts the blower after 30 to 45 seconds 10 The evaporative cooling pump motor and the blower continue to operate 11 For units with the evaporative cooling thermostat the pump motor cycles on a call for cooling 12 The system switch is placed in the Off mode 13 The evaporative cooling pump motor stops 14 The fill and drain valves accessory or by others are de energized a The normally open side of the 3 way fill valve opens to allow water to drain and the normally closed side of the fill valve closes to prevent water from flowing to the evaporative cooler See Figure 3 1 b The normally open side of the 2 way drain valve opens to allow the water in the evaporative cooler to drain See Figure 3 1 15 The time delay relay stops the blower after 30 to 45 seconds 5 588 3 5 OPTION AND ACCESSORY CONTROL DEVICES OPTION AND ACCESSORY CONTROLS Figure 6 1 Dimensions Fill and Drain Valves Float Switch The float switch is factory installed in the evaporative cooler electrical junction box The switch includes a float level and contact that prevents the pump motor from operating until the water level in the tank
16. he unit consider general space and cooling requirements and availability of water supply drain and electrical supply 3 Be sure the structural support at the unit location is adequate to support the weight of the unit UNIT LIFTING When the unit is equipped with an evaporative cooler the module is factory installed and wired Four 3 4 holes at the extended ends of the unit mounting channels are supplied to facilitate lifting the unit Refer to Literature 5 572 or AIR5 572 Installation and Service Manual for recommendations 5 588 3 UNIT INSTALLATION UNIT INSTALLATION Refer to Literature 5 572 or AIR 5 572 Installation and Service Manual for general installation instructions The following are additional requirements for the evaporative cooling section Unit Leveling For proper operation the evaporative cooler must be installed in a horizontal level position The evaporative cooler is provided with two leveling feet with 20 leveling adjustment range See Dimensions Once the blower and duct furnace section has been leveled the evaporative cooler must be leveled by adjusting the leveling screws until the leveling feet reach the roof or slab The support under each leveling foot must be capable of carrying 1 4 of the operating weight of the unit See Weights Determine Maximum Design Water Flow Rate Before running the water supply line to the evaporative cooler the following procedure is to be used to calculate
17. ines the evaporative cooler media type based on the following numbering system Digit 22 Evaporative Cooling EC 3 6 Munters CELdek Media A 6 Munters CELdek Media Stainless Steel Cabinet 4 12 Munters CELdek Media B 12 Munters CELdek Media Stainless Steel Cabinet 5 6 Munters GLASdek Media C 6 Munters GLASdek Media Stainless Steel Cabinet 6 12 Munters GLASdek Media D 12 Munters GLASdek Media Stainless Steel Cabinet 0 None Table 10 1 Media Specifications Media Specifications Munters CELdek amp Munters GLASdek amp Base Sheet Cellulose Glass Fiber Maximum Water Temperature 130 F 130 F Maximum Air Temperature 300 F 300 F pH Range 6 9 6 9 Dry Weight Ib ft 2 4 1 4 Wet Weight Ib ft 5 6 7 0 Operating Weight Ib ft 6 0 9 0 Water Load gpm ft 1 5 1 5 Maximum Pack Size DxWxH 12 x 12 x 72 12 x 12 x 72 Fire Rating UL None 900 Class Il Flame Spread Index E84 81a 450 5 Table 10 2 Pump Motor Specifications Digit 14 A B D F or G Digit 14 C or E p 208V 1 208 3 460V 3 EI O 230V 1 or LG ES ee Media 6 Media Digit 16 Pump Amp ae Amp Pump Amp Le Amp ELEM Size Blower Type Draw Draw Draw Draw 1 70 L 25 250 300 l J orK 350 400 500 600 1 70 700 800 I J K L 840 960 For 208V 1 208V 3 460V 3 and 575V 3 units the pump motor operates at 115V 1 A 250 VA transformer is supplied to step down the voltage 15
18. it Refer to this diagram for all wiring connections START UP PROCEDURE IMPORTANT 1 To prevent heat exchanger failure do not operate the evaporative cooling unit in air streams with temperatures below 40 F Operating the unit in temperatures less than 40 F will cause icing Normally ice will not harm the media but it can block the airflow and possibly crack the plumbing 2 Start up and adjustment procedures should be performed by a qualified service agency Refer to Literature 5 572 or AIR 5 572 Installation and Service Manual for general start up instructions The following are additional requirements for the evaporative cooling section reference Figure 4 1 Figure 4 1 Evaporative Cooler Components O Water Inlet Valve Float Valve Inlet Valve Float Arm and Float Overflow amp Drain bottom panel shown as clear for illustrative purposes amp Pump Motor amp Media Supply Line and Flow Restrictor O Bleed Line and Flow Restrictor Turn off power to the unit at the disconnect switch Check that all water connections are weatherized Remove the birdscreen Remove the hose clamp and bleed tube from the overflow tee Cover the tee opening to prevent the tank water from draining 5 Tighten the bleed line flow restrictor See Figure 5 1 completely Then loosen the screw 2 counterclockwise turns PONS 6 Open the water supply valves and close the drain valves Refer to Figure 3
19. late on the unit for complete unit model number serial number and company address Any substitution of parts or controls not approved by the factory will be at the owner s risk Disconnect power supply before making wiring connections to prevent electrical shock and equipment damage Do not submerse the pump motor in water The evaporative cooler pump motor is not submersible A CAUTION Any original factory wiring that requires replacement must be replaced with wiring material having a temperature rating of at least 105 C IMPORTANT To prevent heat exchanger failure do not operate the evaporative cooling unit in air streams with temperatures below 40 F Operating the unit in temperatures less than 40 F will cause icing Normally ice will not harm the media but it can block the airflow and possibly crack the plumbing Start up and adjustment procedures should be performed by a qualified service agency The proper media direction must have the 45 flutes slope down toward the air entering side The 15 flutes must slope down toward the air leaving side See Figure 8 2 for media direction To check most of the Possible Remedies in the troubleshooting guide listed in Table 9 1 refer to the applicable sections of the manual Table of Contents Inspection on Arrival eeeenm iiaeia 1 General Information Installation Codes 1 Special Precautions sii
20. o below the top of the overflow pipe If the float valve is not operating properly a new assembly is available from the factory Evaporative Cooling Media The evaporative cooling media should be checked annually for dry spots scale and algae formation Normally the media water will flush debris and dirt from the face of the media To remove scale and algae deposits dry the pad completely and brush up and down with a soft bristled brush Do not brush side to side Test a small area first to make sure the media can withstand the brushing If the deposits cannot be removed the media should be replaced See Media Replacement Average media life expectancy is five cooling seasons Birdscreen and Optional Pre Filters The birdscreen should be cleaned at the beginning of each year so that any debris that may have been caught will not restrict the air flow to the unit If the unit was supplied with optional pre filters the pre filter should be checked monthly Clean or replace if necessary In dirty atmospheres filter maintenance may be required more often Pump Assembly and Water Flow Check the pump assembly operation and water flow Ensure proper water distribution across the media See Start Up Media Water Flow Adjustment Blower Assembly Refer to Literature 5 572 or AIR5 572 Installation and Service Manual for blower assembly maintenance instructions Electrical Wiring The electrical wiring should be checked ann
21. ter pressure for both valves is 50 psi Refer to Figure 3 1 for locations of the field installed valves in the supply and drain lines Automatic Fill and Drain Kit The automatic fill and drain kit is identical to the manual remote fill and drain kit but it also includes a 7 day push pin style appliance timer with single pole single throw SPST Switching 12 settings per day with 2 hour per pin time increments The timer power supply requires a separate line for 115V power Refer to the unit wiring diagram for connections and Literature 5 582 7 day programmable time clock for mounting instructions Fill and Drain Kit Freeze Protection Freeze protection can be included with both the manual remote and the automatic fill and drain kits The freeze protection thermostat prevents the evaporative cooler tank from filling when the outside air temperature is below the thermostat set point Typically 40 F The freeze protection duct thermostat Penn A19AAF 12 25 225 F SPDT is shipped loose for field installation in a location that will sense the outside air temperature Refer to the unit job specific wiring diagram for low voltage field electrical wiring connections 6 5 588 3 EVAPORATIVE COOLER DIMENSIONS WEIGHTS AND PERFORMANCE DATA Figure 7 1 Evaporative Cooling Module Top View 1 2 NPT Drain e W 2 1 50 1 2 NPT
22. the maximum design water flow rate Example calculations will be used based on the following conditions e Model Size 200 7 5 ft media face area from Table 7 1 12 Media Depth 4500 CFM Location Phoenix AZ ASHRAE Design Temps Entering Dry Bulb Temp EATbs 108 F Entering Wet Bulb Temp EATws 69 F 1 Calculate the Media Face Velocity Media Face Velocity CFM Media Face Area Example Media Face Velocity 4500 7 5 600 fom 2 Find Cooling Effectiveness from Figure 3 1 Example The 12 media effectiveness curve is approximately 88 5 at 600 fpm Figure 3 1 Evaporative Cooling Effectiveness 100 95 90 85 4 80 75 4 Media Cooling Effectiveness 70 65 4 60 100 200 300 400 500 600 700 800 Media Face Velocity fpm 3 Calculate the Leaving Dry Bulb Air Temp LATbs LATbs EATbs Effectiveness x EATps EATbs Example LATbs 108 F 88 5 x 108 F 69 F 3 F 4 Calculate Approximate Evaporation Rate GPM CFM x EATps LATbs 500 000 Approx Evaporation GPM Example 4500 x 108 F 73 F Approx Evaporation GPM 0 3 GPM id ii 500 000 Water Supply Connection The water supply is located on the side of the evaporative cooler See Dimensions The water supply must be run to the float valve connector 1 2 NPT Water Inlet on the unit The 1 2 supply line may be eith
23. ually for loose connections or deteriorated insulation IMPORTANT The proper media direction must have the 45 flutes slope down toward the air entering side The 15 flutes must slope down toward the air leaving side See Figure 8 2 for media direction Figure 8 1 Media Replacement 1 Turn off power to the unit at the disconnect switch 2 Close the water supply valve and open the drain valve to drain the evaporative cooler 3 Remove the birdscreen 4 Remove the four screws two on each side that support the front media support plate 5 Remove front media support plate The electrical cord will hang loose Remove the V shaped water distribution plate and attached piping from support pins 6 Remove replace the media with the correct media To determine the media provided with the unit see Model Nomenclature When replacing the media the configuration of the media in the evaporative cooler is important See Figure 8 2 Media Direction 7 With the media installed replace the front media support plate and the water distribution piping Ensure that the electrical cord and bushing are properly located in the U shaped notch in the front media support plate 8 Replace the four screws removed in Step 4 9 Replace the birdscreen 10 Open the water supply valve and close the drain valve to fill the evaporative cooler 11 Turn on power to the unit at the disconnect switch Figure 8 2 Media Direction
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