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Baltimore Aircoil Company DFCV-AD-EC Series, Operating And Maintenance Instructions Manual

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Baltimore Aircoil Company DFCV-AD-EC Series Operating And Maintenance Instructions Manual Download Page 29

Model

Number of

fans

Number of adiabatic pre-cooling

sections/cooler

Number of bottom

drains/cooler

DFCV-EC9126-*

12

4

4

DFCV-EC9127-*

14

4

4

Number of adiabatic pre-cooler sections and drains

Each pre-cooler section has a sloping pan, assuring complete water drainage and discharge of any floating solids

to the sewer. Larger debris will however accumulate and settle in the gutter system and may be too large to drain

via the bottom drain and finally may block the bottom drain.

Draining system – inside

Draining system - outside

It is therefore necessary to regularly clean the adiabatic gutter system to remove all solids. Access for cleaning is

given to the inside of the gutter system after removal of the pre-cooling media. For cleaning sequence see table

"Recommended Maintenance and Monitoring Programme" on page 1.

W W W . B A L T I M O R E A I R C O I L . E U

29

6 Maintenance procedure

6 Maintenance procedure

Summary of Contents for DFCV-AD-EC Series

Page 1: ...DFCV AD EC Adiabatic Cooler OPERATING AND MAINTENANCE INSTRUCTIONS MDFCV EC ADv06EN ...

Page 2: ... can be found on the website www BACService eu Checks and adjustments Start Up Every month Every 3 months Every 6 months Every start of adiabatic season Spring Adiabatic pre cooler water flow X X X Adiabatic controller set point X X X Tighten electrical connections X X X Rotation of fan s X Motor voltage and current X X X Unusual noise and or vibration X X X Inspections and monitoring Start up Eve...

Page 3: ...ainst coil freezing 12 5 Operating instructions 13 TrilliumSeries Coolers with EC fans factory installed control panel 13 Control logic 13 Electrical panels 13 Operating instructions Digital Controller 14 Monitoring of process information 15 6 Maintenance procedure 17 Checks and adjustments 17 Inspections and corrective actions 19 Fan replacement 20 Cleaning procedures 22 Adiabatic pre cooling med...

Page 4: ...e cooler media 6 Pre cooler solenoid valve and water filter 7 Pre cooler drain 8 Pre cooler flow valve meter 9 Pre cooler water distribution header 10 Pre cooler water distribution pads 11 Ambient temperature sensor 12 Power panel 13 Control panel Details 4 DFCV AD EC 1 1 Construction details 1 Construction details ...

Page 5: ...statically controlled heaters are employed the temperature range can be extended from 40 C to 45 C HEAT EXCHANGER COIL Design working pressure 21 bar Design test pressure 30 bar Design temperature 20 C 120 C ADIABATIC PRE COOLER OF TRILLIUMSERIES COOLER Design pressure 10 bar Maximum fluid inlet temperature 60 C Fluids circulated through the inside of the coils must be compatible with the coil con...

Page 6: ...machinery directive Depending upon site conditions it also may be necessary to install items such as bottom screens ladders safety cages stairways access platforms handrails and toe boards for the safety and convenience of the authorized service and maintenance personnel At no time this equipment should be operated without all fan screens in place Since the equipment operates at variable speeds st...

Page 7: ...permission of BAC the party who has done the modification becomes responsible for all consequences of this change and BAC declines all liability for the product Warranty BAC will guarantee all products to be free from manufactured defects in materials and workmanship for a period of 24 months from the date of shipment In the event of any such defect BAC will repair or provide a replacement For mor...

Page 8: ...lace damaged or spent pre cooler media Refer to Construction details on page 4 Mains cold water is supplied to 6 and is fed to the water distribution system 9 via a flow valve meter 8 The recommended mains water supply pressure is minimum 3 bar and the flow valve meter 8 needs to be adjusted at installation to feed a minimum water flow over the adiabatic pre cooler See table Minimum recommended ad...

Page 9: ...22 l min DFCV EC9124 8 fans 28 l min DFCV EC9125 10 fans 36 l min DFCV EC9126 12 fans 44 l min DFCV EC9127 14 fans 50 l min Recommended adiabatic pre cooler water flow rates If any of the following happens at ambient conditions exceeding the given maximum ambient conditions with supply water quality data exceeding one or more of the concentration limits of above table Minimum supply water quality ...

Page 10: ... water is scale forming With Practical Scaling Index below 5 5 minimum recommended water flow in table Minimum water flow rates needs to be increased contact your local BAC Balticare representative for support Biological control The adiabatic pre cooler and its controls have been designed to minimize the risk of uncontrolled growth of algae slimes and other micro organisms such as Legionella 1 Dir...

Page 11: ...on should be practiced when using them in the adiabatic pre cooling system Continuous dosages of chlorine or bromide could delignify the cellulose fibres of the pre cooler media and degrade the stiffening agents RECOMMENDED CHLORINE BROMIDE DOSAGES Continuous Treatment Not required when basic housekeeping practices are followed and when the guidelines for operation and maintenance of this bulletin...

Page 12: ...nd this should be taken into account when selecting the model s The table below indicates the freeze protection range for various ethylene glycol concentrations by volume Ethylene Freeze protection 20 10 C 30 16 C 40 25 C 50 39 C Freeze protection of ethylene glycol solutions Glycol systems require specific inhibitors compatible with the materials of construction they come into contact with These ...

Page 13: ...he design leaving temperature ensuring a minimum in electrical consumption and noise levels The adiabatic pre cooling will be activated and stopped on the basis of a pre programmed logical combination of the fan speed and the ambient temperature release set point Default settings will not activate adiabatic pre cooling unless all fans are running at maximum permissible speed and the dry to adiabat...

Page 14: ...anel the following components can be found Emergency stop Push to activate rotate to de activate Power failure reset After a loss of main power the unit may not start automatically This button needs to be pressed after a technician has verified that it is safe to restart the unit ON OFF switch Operating instructions Digital Controller There are four different menu s Default Menu consultation Opera...

Page 15: ...Set point both summer and winter PI parameters Cleaning cycle activation deactivation duration Day night operation activation deactivation start stop Day night operation maximum frequency Restriction on water usage period Status of pre cooler authorization Time delay on alarm messages Reset function on internal timers VFD pre coolers Communication address baud rate Time date Change access code CAU...

Page 16: ...the digital controller for monitoring can be wired to the terminal strip Depending on the required communication protocol a different optional communications card can be installed in the controller W W W B A L T I M O R E A I R C O I L E U 16 ...

Page 17: ...tributed over the adiabatic pre cooler as per minimum water flow rates See table below Minimum recommended adiabatic pre cooler water flow rates The water flow will depend on the supply water pressure and can be set by adjusting the adjustment screw on the water flow valve on the flow meter See figure below Read off the water flow at the underside of the float Water flow adjustment screw DFCV AD E...

Page 18: ...ten electrical contacts if required before commissioning the unit Transport may loosen some of the contacts posing a risk for overheating or voltage drops Also during operation half yearly checks are recommended ROTATION OF FANS Fans must rotate without obstruction in the direction indicated by arrows on the equipment MOTOR VOLTAGE AND CURRENT Check the voltage and the current of all three legs of...

Page 19: ...ed also during mid season and winter season when usually no adiabatic cycles would be needed The inspection should focus on Signs of excessive fouling and scaling of the media Full and even wetting of the face area Fouling If excessive dirt and debris has accumulated on the pre cooling media it is recommended to rinse the media Refer to Adiabatic pre cooling media on page 27 for the recommended pr...

Page 20: ...tacks the metal coil coating or the personnel applying the cleaner An important concern when applying coil cleaners is rinse ability Most hydroxides tend to cling the surface unless sufficient wetting agents have been added to the formula to reduce surface tension of the solution If the solution does not have enough wetting agents and is not rinsed thoroughly from the surface the residual material...

Page 21: ...r control interface SELV Kl 2 4 C Status relay floating status contact changeover contact common connection contact rating 250 VAC 2 A AC1 KL 2 5 Din1 Digital input 1 enabling of electronics Enabling open pin or applied voltage 5 50 VDC Disabling bridge to GND or applied voltage 1 VDC Reset function triggers software reset after a level change to 1 V SELV KL 2 6 10 V Fixed voltage output 10 VDC 10...

Page 22: ...r Also the city water filters or strainers need to be cleaned out at least once per month as follows remove water filter access cap remove strainer mesh and rinse mesh with clean water Water filter The recommended procedure for cleaning of the water distribution header is 1 Remove all the pre cooling media from the pre cooler section to give access to the water distribution header ends Refer to Cl...

Page 23: ... connection 4 Pull the copper tube pipe downwards to release it from the plastic holders Release copper collector from plastic holders 5 Carefully remove the collector from the pre cooler W W W B A L T I M O R E A I R C O I L E U 23 6 Maintenance procedure 6 Maintenance procedure ...

Page 24: ...ment hole Mark its position on the opposite side of the collector to assist you in placing the collector back in the pre cooler section Alignment hole 8 One of the plastic holders has a longer screw to assist in the alignment of the collector Make sure that you have the correct side of the collector facing the plastic holder W W W B A L T I M O R E A I R C O I L E U 24 ...

Page 25: ... pipe 10 Use the mark you made on the collector to locate the correct position of the alignment hole Push the collector upward to clamp it securely into the plastic holders Alignment of waterfeed pipe 11 Reposition the water feed assembly Note that it should go 30 mm inside the rubber tube W W W B A L T I M O R E A I R C O I L E U 25 6 Maintenance procedure 6 Maintenance procedure ...

Page 26: ...pe to the city water supply Use the pad maintenance switch to open the city water valve Check the collector for any holes that remain clogged If some holes are still clogged repeat the procedure 14 Place the pre cooling media back in the pre cooler section Refer to section Adiabatic pre cooling media on the facing page W W W B A L T I M O R E A I R C O I L E U 26 ...

Page 27: ...edia is 5 to 7 years if basic housekeeping practices and these operating and maintenance guidelines are followed If severe disposition causes reduced humidification efficiency and reduced airflow it is recommended that the pre cooling media is replaced New adiabatic pre cooling media are available from your local BAC Balticare representative Media removal replacement procedure 1 Verify that the pr...

Page 28: ...tic operation is collected into a gutter and drained to the sewer via one or two different drains per pre cooler side 8 fan 10 fan and 12 fan coolers are equipped with 4 separately shipped adiabatic pre cooling sections 2 per side Each adiabatic pre cooler section is equipped with a separate bottom drain guaranteeing full emptying and drying of the gutter system after each adiabatic cycle Refer to...

Page 29: ...e and settle in the gutter system and may be too large to drain via the bottom drain and finally may block the bottom drain Draining system inside Draining system outside It is therefore necessary to regularly clean the adiabatic gutter system to remove all solids Access for cleaning is given to the inside of the gutter system after removal of the pre cooling media For cleaning sequence see table ...

Page 30: ...Make sure you include the unit serial number when ordering any parts Prolonged outdoor stay Should the unit s be stored outside prior to installation and or start up for approximately one month shelf life or longer or stored in severe climates it is imperative that certain actions be performed by the installing contractor in order to maintain the unit in as shipped condition These actions include ...

Page 31: ...actice to keep your Cooling System efficient and safe Eurovent Cecomaf 2002 30p Guide des Bonnes Pratiques Legionella et Tours Aéroréfrigérantes Ministères de l Emploi et de la Solidarité Ministère de l Economie des Finances et de l Industrie Ministère de l Environnement Juin 2001 54p Voorkom Legionellose Minsterie van de Vlaamse Gemeenschap December 2002 77p Legionnaires Disease The Control of Le...

Page 32: ...AL STORAGE EVAPORATIVE CONDENSERS HYBRID PRODUCTS PARTS SERVICES www BaltimoreAircoil eu info BaltimoreAircoil eu Please refer to our website for local contact details Industriepark Zone A B 2220 Heist op den Berg Belgium Baltimore Aircoil International nv ...

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