Robur AD 14 Installation, Use And Maintenance Manual Download

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Installation, use and
Maintenance manual

Evaporative Cooler AD 14

Evaporative cooling is a completely natural way
of producing refreshing cool air
for warehouses or factories

Summary of Contents for AD 14

Page 1: ...Installation use and Maintenance manual Evaporative Cooler AD 14 Evaporative cooling is a completely natural way of producing refreshing cool air for warehouses or factories ...

Page 2: ...filed at Robur S p A Any use of this manual other than for personal consultation must be previously authorised by Robur S p A The rights of those who have legitimately filed the registered trademarks contained within this publication are not affected With the aim of continuously improving the quality of our products Robur S p A reserves the right to vary the data and contents of this manual withou...

Page 3: ...r to the electrician who must connect the heating unit to the electrical system and to the end user who must check that it functions properly This manual is also for the technicians regarding the principle maintenance operations CONTENTS 1 General Information 4 2 Installation 7 3 Control system 14 4 Commissioning 20 5 Operating of the unit and Settings 23 6 Maintenance and Service 28 Evaporative C...

Page 4: ...cordance with local regulations In case of failure and or poor operation isolate the unit disconnect it from the power supply and close water supply valve do not attempt any repair or direct servicing Call qualified service engineers only The manufacturer s authorised service centres using only original spare parts must only carry out any repair to the products Misapplication of the above might co...

Page 5: ...tem comprises of a main control panel which controls all components by communicating with a wall mounted control box and a set of external inputs like thermostat humidistat timer alarm etc 1 3 CONSTRUCTIVE CHARACTERISTICS Evaporative Cooler AD 14 is supplied with The cooling pads are cellulosa based 680x850x100 mm thickness Axial fan 1 to 5 speeds and high static pressure Control board with microp...

Page 6: ... Water Sump Capacity l 23 Electrical Supply 230 V 50 Hz Water Supply Connection Water Drain Connection 1 Square Duct Dimensions mm 645 x 645 Axial Fan Rating kW 1 5 Water Pump Rating kW 0 05 Noise Level 3 meter max speed min speed dB A dB A 74 64 Dimensions Width Depth Height mm mm mm 1 170 1 170 950 Weight dry kg 92 Weight operating kg 127 Weight transport kg 117 ...

Page 7: ... a fragile item and must be handled carefully The maximum stacking height is 2 Once removed from the pallet take great care not to damage the drain which protruded from the bottom of the unit 2 2 Installation The dimensions of the unit are shown in the diagram opposite A minimum of 300mm clearance must be provided around the unit to enable the side panels to be removed The operating weight of the ...

Page 8: ...the cooler is level The cooler must be installed on a level to ensure safe and efficient operations The duct enters the cooler 30mm A typical roof mounted installation to a plenum chamber is shown Checks must be made that the roof structure can support the full operating weight of the system plus the ductwork and plenum chamber Coolers should not be placed where the intake could be contaminated wi...

Page 9: ... delivered with no 2 adjustable support brackets The purpose of the brackets is to support the heaviest side of the cooler where the internal water tank is positioned in case the AD14 Cooler is installed directly on the air duct system standard down discharge see picture below With this kind of installation and in particularly hot climate conditions if the cooler is exposed directly to the sun for...

Page 10: ...l the cooler connecting the cool air down discharge to the duct system below fix the brackets to the duct as shown in the diagram below adjust the brackets so that the water tank is levelled and well supported by the brackets 2 4 Services connections The services are all fed from the bottom at the points shown ...

Page 11: ...the exhisting safety standards 4 The unit should be connected to the electric supply line by means of an omnipolar switch with a minimum contact opening of 3 mm An omnipolar switch ia a Double pole isolating switch i e a switch capable of disconnecting both on phase and neutral This means that when the switch is opened both contacts are disconnected 2 6 Water The cooler must be supplied with fresh...

Page 12: ...e water and drain valves during the winter months of non use of the AD 14 it is necessary to discharge the hydraulic circuit including water supply pipe 2 8 Remote Control The wall mounted controller comes fitted with a 30m control cable This can be extended up to 200m using appropriate standard 16 core 0 75mm2 The control voltages contained within these controllers are 12V The wiring diagram for ...

Page 13: ...14 The first terminal block is used for all of the manual controls plus the purple automatic cable The second terminal block is for the Alarm Timer Humidistat and Thermostat Note that the Alarm and Timer contacts must be made for the cooler to operate ...

Page 14: ...e cooler off stops all functions and cooler drains automatically Auto Man Auto o In manual mode the cooler follows the set fan speed and cool vent mode o In Auto the fan speed and cool vent mode are automatically set according to the status of the thermostat and humidistat Fan Speeds 1 to 5 o Manual setting of fan speed Cooling Cool or Vent mode o Vent mode Water circuit is disabled Sump drains au...

Page 15: ...e water into the cooler V2 Drain valve controls the drain from the cooler L1 Level Probe controls the water levels in the cooler L2 Level Probe controls the water levels in the cooler L3 Level Probe controls the water levels in the cooler L4 Level Probe controls the water levels in the cooler P1 Circulation Pump circulates the water onto the cooling media F1 Fan double wound single phase fan motor...

Page 16: ...ned In an alarm condition it shows the following codes 01 Slow fill Auto Reset 02 Overflow Manual Reset 03 Probes out of sequence Manual Reset 04 Abnormal evaporation Manual Reset 05 Slow Drain Auto Reset 06 External Alarm Auto Reset A detailed explanation of these faults and possible causes are detailed in the fault finding section A LED Display D ISP System Port G Timer B Dip switches C RS232 Po...

Page 17: ...ation Dip Switches 2 3 and 4 Salinity settings As the water evaporates the scale forming salts increase in concentration To control this function the cooler drains the sump completely when a set concentration is reached This is determined volumetrically using the level probes These dip switches determine the number of fill cycles prior to this drain The concentration factor should be calculated ba...

Page 18: ...70 870 1 600 600 600 Dip Switch 8 Auto Stop Conditions In AUTO mode the default condition is the cooler remains at Speed 1 VENT mode when the set point has been achieved If this switch is enabled then the cooler will shut down completely 3 3 3 Water probes The four water level probes are base on magnetic floats which operate reed switches They provide the input for the following functions At start...

Page 19: ...ump runs as described above 3 3 4 External alarm This contact must be made at all times This can be used to stop the machine when linked to Fire alarm system Smoke detectors 3 3 5 Timer This switches the cooler on and off This contact must be made at all times for the cooler to run The cooler will re start at the previous settings 3 3 6 Humidistat In automatic mode this disables the cool function ...

Page 20: ...sequence Stage 2 Drain test The drain valve opens for 7 seconds and then closes Note that the Scavenge Pump operates at the same time as the drain Stage 3 Water valve test Both water valves open for 17 seconds Valve V1 stays open valve V2 closes for 5 seconds Valve V2 opens and V1 Closes or 5 seconds Both water valves then stay open Stage 4 Water level probe test The water valves stay open and the...

Page 21: ...ump Valve V1 Valve V2 Level LL Level L Level H Circulation pump Level HH 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 Water fills to LL Water fills to L Water fills to H 1 2 3 4 5 6 7 8 9 0 Manually operate HH Cooler drains ...

Page 22: ...ly seated in the side frames They can work loose in transit and must be correctly located to ensure efficient and leak free operation 2 Is the cooler level The cooler is designed to sit on a duct which is finished with a horizontal plain edge If it is not level the water controls may not operate correctly ...

Page 23: ...ten minutes If a humidistat is used then check its operation by reducing its set point to a low value so the contacts open The water circulation should then stop Then reset the humidistat to 100 The cooler should then slow down progressively until it is on speed 1 vent mode If dip switch 8 is enabled the cooler will stop completely 5 2 Connections of Remote Items The wall control box for the AD 14...

Page 24: ... will flash with a 6 times sequence and the Main Control Panel will show 6 on the LED The Alarm function operates in both Manual and Automatic Mode 5 4 Timer This connection is intended to be used to shut down the cooler in a controlled manner This has to be closed for the cooler to operate Typical applications are Connection to a timer Connection to an auxiliary switch E g link to a switch which ...

Page 25: ...f the room temperature is over the set point the fan speed increases by one increment If the room temperature is below the set point the fan speed decreases by one increment Light Yellow Alarm Light Green Timer Light Yellow Alarm Light Green Timer Light Yellow Alarm Light Green Timer Yellow black Alarm Green black Timer Orange black Thermostat White black Humidistat Red black Common Yellow black A...

Page 26: ...d together The alarm will shut the cooler down in a controlled manner and show the alarm condition The timer will shut the cooler down in a controlled manner The thermostat will set the fan speed and cooling mode to achieve a set temperature The humidistat will prevent a build up of humidity over a set point Light Yellow Alarm Light Green Timer Light Yellow Alarm Light Green Timer Yellow black Ala...

Page 27: ...ms When connection is made it is important that the Dark Green Common from each cooler is connected to the same side of each switch An example of this for linking two coolers to a common thermostat is shown below Cooler 1 Cooler 2 Light Green Timer Light Yellow Alarm Yellow black Alarm Green black Timer Orange black Thermostat White black Humidistat Red black Common ...

Page 28: ... is not covered within 20 minutes this means there is a water supply problem Possible causes Water supply not turned on turn water on Filter on inlet to solenoid blocked clean filter Drain valve held partially open by debris clear clean drain Solenoid valves failed Diagnostic Use test sequence to check 12VAC should be present between contacts V1 and V2 on control board If voltage is present and va...

Page 29: ... are closed when floats are in lower position 4 flashes Abnormal evaporation Manual reset In COOL operation if a fill cycle is not activated in a 12 hour period this alarm is activated Possibles causes Circulation pump blockage clear debris Circulation pump failure repair replace Very abnormal weather conditions reset 5 flashes Slow drain Auto reset In a drain operation if the Very Low Level probe...

Page 30: ...omatically clear when the fault clears Manual reset A manual reset alarm requires the cooler to be turned off at the wall box after the fault has been cleared The LED in the main control box also gives a readable value to the alarm condition This value will be kept after the alarm has been re set so that the last alarm condition can always be identified If another alarm condition occurs then this ...

Page 31: ...ooler still in cleaning mode Operated test switch once or power down Cooler is not efficient Pads dirty Clean pads and replace as appropriate Pads dirty Clean pads and replace as approrpriate Air from cooler smells Stagnant water Mains power is being turned off and water not automatically drain Resume use of full control system continuously Venturi is incorrectly locatedi Make sure venture is corr...

Page 32: ...ame slightly and moving it outwards the side frame holding the pad can be removed Take care not to damage the top surface of the pad 6 2 2 Cleaning the cooler 1 Clean all surfaces to remove any deposits 2 Remove the water distributors and clean thoroughly 3 Remove the water pump and clean the impellor area 4 Clean water probes carefully 5 Clean the pads using low pressure water Note on salinity se...

Page 33: ...se and Maintenance manual ed 04 14 6 2 5 Insect screen cleaning 1 Remove insect screens carefully by lifting from the side frames 2 Clean using low pressure water 3 Inspect and replace if damaged 4 Replace in side frame ...

Page 34: ... Manual reset In COOL operation if a fill cycle is not activated in a 6 hour period this alarm is activated This is typical of a circulation pump failure 5 flashes Slow drain Auto reset In a drain operation if the Very Low Level probe is not uncovered in 10 minutes this alarm is activated 6 flashes External alarm Auto reset In the control panel there are a set of contacts which can be connected to...

Page 35: ...35 Installation use and Maintenance manual ed 04 14 ...

Page 36: ... safe environmentally friendly and energy efficient products trough the commitment and caring of our employees and partners Robur Mission Robur S p A advanced heating and cooling technologies Via Parigi 4 6 24040 Verdellino Zingonia Bg Italy T 39 035 888111 F 39 035 884165 www robur com Codice D LBR483 Rev D 14 MCM SDC 009 10 04 2014 ...

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