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Robur AD 14 Installation, Use And Maintenance Manual

Evaporative cooler
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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

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Summary of Contents for Robur 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 EDITION: 04/2014 Code: D-LBR483 This manual has been drawn up and printed by Robur S.p.A.; whole or partial reproduction of this manual is prohibited. The original is 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.

  • Page 3: Table Of Contents

    FOREWORD This manual is for anyone who must install or use the Robur AD 14 evaporative cooler. This manual especially applies to the plumbers who must install the evaporative cooler, 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.

  • Page 4: General Information

    GENERAL INFORMATION In this section you will find the general instructions to follow for the installation and use of the AD 14 evaporative cooler, a brief mention of the operation of the unit, the constructive characteristics and the technical data.

  • Page 5: Control System

    (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...

  • Page 6: Technical Data

    1.4 TECHNICAL DATA Air Flow Rate 14.000 Water Supply Pressure min/max 1 / 7 Minimum Water Flow Rate l/min Water Sump Capacity Electrical Supply 230 V – 50 Hz Water Supply Connection “ ½ Water Drain Connection “ Square Duct Dimensions 645 x 645 Axial Fan Rating Water Pump Rating...

  • Page 7: Installation

    The operating weight of the unit, when full of water is 92Kg is designed to be supported from a AD 14 plain square duct with nominal external dimensions 645mm x 645mm. Note that due to the variation in the moulding of plastics there may be some variation in these dimensions –...
  • Page 8 The side frames are also act as a guard for the fan. Set screws prevent their removal unless a tool is used to comply with guarding regulations. To remove the side panel first remove the security screws. Then lift the panel and the top edge can be removed.
  • Page 9 It is normal to support the weight of the cooler on supports on the underside of the roof. 2.3 - Support brackets installation Every Evaporative Cooler AD 14 is standard delivered with no. 2 adjustable support brackets. The purpose of the brackets is to support...
  • Page 10 To install the brackets, please proceed like follows: install 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 –...
  • Page 11 2.5 – Electrical supply The electrical connections must be done by Qualified service engineering. Before beginning this operation, cut off the electrical supply. Check that the voltage supply is 240/50Hz single-phase Carry out the electrical connections accordino to the installation wiring diagram When connecting, censure that the earth wire is longer than the live wires, so that i twill be the last wire to break if the supply cable is stretched, thus ensuring a good earth continuità.
  • Page 12 To avoid damage to the 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.
  • Page 13 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. Installation, use and Maintenance manual - ed.

  • Page 14: 3- Control System

    SECTION 3 CONTROL SYSTEM Overview of system The control system comprises of a main control panel which controls the above components by communicating with a wall mounted control box and a set of external inputs. On/Off Man/Auto Velocità 1 Termostato On/Off Velocità...
  • Page 15 o Alarm Highlights the system has an error The number of pulses indicates the fault present. The purpose of the system is to control the following components L1 L2 L3 L4 Water in Water out Water inlet valve – controls the water into the cooler Drain valve –...
  • Page 16 3.2 - The Control Board- The Controller The heart of control system is a printed circuit board. The layout with the key input/output locations is shown below N - Spare A -LED Display O - Drain B - Dip switches P –...
  • Page 17 3.3.2 - Dip Switches All variable parameters are set by changing the positions of the dip-switches located on the main control board. These changes can only be made during mains power off for a minimum of 5 seconds. Switch Default Function Pre Cool Cycle Salinity 1...
  • Page 18 Dip-Switch 5 – 24hr Dry Cycle: The cooler will dry out for 30 minutes during every 24 hours of continuous operation. This can be applied to in certain circumstances to improve the hygiene of the cooler Dip-Switches 6 and 7 – Maximum speed settings This enables the top speed of the fan to be limited.
  • Page 19 Inlet valves V1 and V2 are alternated in this way to validate their operation. If either one fails then the water will rise to the Very High Level which will result in an alarm condition and the other valve will close. This gives a high degree of protection from over-flow. This cycle continues according to the dip switch 2, 3&4 settings.

  • Page 20: Commissioning

    SECTION 4 COMMISSIONING L’AD 14 comes fully operational and ready for use. There are a number of options which are enabled using the dipswitches mounted on the main control board inside the machine. These are described in the previous section.
  • Page 21 Test sequence ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼...
  • Page 22 The only other points to check are 1 – Are the pads fully 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.

  • Page 23: Operating Of The Unit And Settings

    5.2 – Connections of Remote Items The wall control box for the AD 14 has a serie wires for optional connection to remote items. They are contained on a separate terminal block in the wall control box.
  • Page 24 5.3 - Alarm This connection is intended to be used to shut down the cooler in a controlled manner and show an alarm condition at the Wall Control Box and the LED in the Main Controller. This has to be closed for the cooler to operate. Typical applications are: •...
  • Page 25 Light Yellow (Alarm) Yellow/black (Alarm) Light Green (Timer) Green/black (Timer) Orange/black (Thermostat) White/black (Humidistat) Red/black (Common) 5.5 - Alarm and timer Alarm and Timer These functions can be combined. Both contacts have to be closed for the cooler to run. This function operates in both Manual and Automatic Modes Yellow/black (Alarm) Light Yellow (Alarm)
  • Page 26 5.7 – Thermostat and Humidistat The Humidistat is only used in Automatic Mode when a Thermostat is fitted. It is intended to be used to prevent high humidity levels during periods of high external relative humidity. When the Humidity exceeds the set point the water circuit is disabled. Yellow/black (Alarm) Light Yellow (Alarm) Light Green (Timer)
  • Page 27 5.9 - Connection of Multiple Coolers to Common Control Items An unlimited number of coolers use the same control items. When connection is made it is important that the Dark Green (Common) from each cooler is connected to the same side of each switch.

  • Page 28: Maintenance And Service

    SECTION 6 - MAINTENANCE AND SERVICE 6.1 – FAULT FINDING Alarm light and LED Faults are reported by the flashing alarm light on the wall mounted panel and this is replicated in the cooler by the LED When the cooler enters an alarm condition the LED on the wall controller flashes to give an indication of the problem.
  • Page 29 3 flashes – Probes out of sequence Manual reset If any probe is covered out of sequence this alarm is activated. Possible causes • Floats not operating • Sticking float: Clear debris and clean float • Sinking float: Replace float •...
  • Page 30 6 flashes – External alarm Auto reset In the control panel there are a set of contacts which can be connected to an external alarm switch. If this is activated this alarm is operated. Possible causes External alarm circuit open Wiring fault Auto reset : the alarm will automatically clear when the fault clears.
  • Page 31 Other Fault Finding Problem Cause Remedy No external alarm fitted but Check bridge is in place on still fault main control panel Pre-cool cycle enabled Fan will not start until water has circulated for 5 minutes – no action required Cooler will not start Electrical supply interrupted Check RCD...
  • Page 32 6.2 – MAINTENANCE It is recommended that a evaporative cooler is regularly maintained. The frequency of maintenance is dependent upon the quality of water, the cleanliness of the air and the frequency of use. In normal conditions a 6 monthly service will maintain the reliability, efficiency and hygienic operation of the cooler.
  • Page 33 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. Installation, use and Maintenance manual - ed. 04/14...

  • Page 34: Evaporative Cooling Operating Instruction

    AD14 Evaporative Cooling Operating Instructions All controls are accessed from the wall mounted control box using the inputs shown below: Alarm light Power The number This switches of flashes the cooler on gives the fault and off Fan speed This set the spped of the fan Auto/Manual Cooling...
  • Page 35 Installation, use and Maintenance manual - ed. 04/14...
  • Page 36 Robur is dedicated to dynamic progression In research, development and promotion of 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...

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