Related Manuals for Daikin Easdale 25
Summary of Contents for Daikin Easdale 25
- Page 1 Installation, Operation and Maintenance Instructions For The Easdale 25 & 50 Air Handling Units REV A – PAGE 9. SECTION 11 ADDED. 11/03/14 Page 1 of 37...
- Page 2 Daikin Applied (UK) Ltd. Contents Index Page 3 - 5 Health and Safety Page 4 Cautionary Notes Page 5 Disposal of Redundant Materials Page 6 Shipping Page 7 - 8 Lifting, Off Loading and Handling Page 8 Location Page 9...
- Page 3 The data should not be arithmetically subtracted from the fan Lw to obtain the inlet & outlet levels. Reference must be made to Daikin Applied (UK) Ltd. When starting the electric motor(s) the procedure as laid down in this manual is fully carried out.
- Page 4 3) The equipment must not be used where flammable dust or vapours may be present. 4) The equipment must not be modified in any way. Daikin Applied (UK) Ltd. will not be held responsible for any unauthorised modifications. 5) Lists of recommended spares are available on request and any spare parts should only be obtained from Daikin Applied (UK) Ltd.
- Page 5 Daikin Applied (UK) Ltd. Safety Information All Electrical work carried out on the Air Handling Units, must be in accordance with the Manufacturers instructions and relevant codes & practices. All work carried out on, or in, the Air Handling Units must be in accordance with the client’s permit to work system.
- Page 6 Daikin Applied (UK) Ltd. Shipping Each unit and section will be clearly identified and each section shall be shipped as an individual section unless otherwise stated on the General Arrangement (GA) drawing. Each section is dispatched covered in shrink-wrapped polythene sheeting. All sharp edges shall be protected with cardboard to stop the polythene sheeting from being ripped.
- Page 7 Daikin Applied (UK) Ltd. Lifting, Off Loading and Handling Care should be taken during all handling of equipment to prevent damage. Estimated weights of shipped sections are shown on the General Arrangement (GA) drawings. The actual weight of the shipped sections is labelled on the polythene sheeting It is recommended that if the units are shipped on wooden pallets that they are left in place until the units have been correctly sited.
- Page 8 Daikin Applied (UK) Ltd. 2) Only non-metal slings must be used. These must be used in conjunction with a lifting frame / beam to ensure an even load distribution and correct positioning of slings. Wooden packing pieces must be inserted between the sling and the framework to avoid damage.
- Page 9 Daikin Applied (UK) Ltd. All fixing channels, clamps,hardware, etc., for connecting the sections together are supplied by Daikin Applied (UK) Ltd. These are boxed separately and are placed inside the fan section for shipment. The assembly procedure is as follows: Referring to the General Arrangement (GA) drawing, ensure the sections are in the correct order of airflow, are correctly orientated and are central to each other.
- Page 10 Daikin Applied (UK) Ltd. Fan Temporary Restraints Fans are supplied with a fan discharge flexible connection and anti-vibration mounts which have been factory installed. To prevent damage to these during transport, temporary restraints are fitted to the fan base inside all fan sections. For details refer to...
- Page 11 Daikin Applied (UK) Ltd. Storage / Static Maintenance For external storage, or storage in partly built plant rooms, the units must be protected to stop the ingress of foreign material or water into the unit. Although covered in shrink- wrapped plastic sheeting this is not intended for long-term storage and should be removed as soon as the unit is off loaded.
- Page 12 Daikin Applied (UK) Ltd. Storage / Static Maintenance (continued) Fan Shaft Bearings Refer to bearing damage in Cautionary Notes section. Bearings fitted with shields should not be stored for periods exceeding two (2) years since the grease will deteriorate with age. Bearings stored for longer periods than that specified may be found to have a higher initial starting torque and the service life of the grease will then be shortened.
- Page 13 Daikin Applied (UK) Ltd. When wiring up to fan motors the cabling should be arranged with enough ‘slack’ to allow the fan / motor assembly to move freely on its anti-vibration mounts as well as allowing movement of the motor for tensioning and slackening off of drive belts.
- Page 14 Daikin Applied (UK) Ltd. For details of typical external fixings of ductwork etc to the unit cabinet refer to drawing A4-500621 Commissioning & Testing Pre-run Check With the unit electrically isolated the following work should be done: 1) Although the fan section will have been factory checked prior to despatch it is always possible for components to loosen during shipment.
- Page 15 Daikin Applied (UK) Ltd. Commissioning & Testing (continued) Pre-run Check (continued) 11) If starting a forward curved fan then care must be taken not to overload the motor above its rated full load current. To achieve this we would recommend that the inlet and outlet dampers are partially closed.
- Page 16 Daikin Applied (UK) Ltd. nameplate. Note! All access panels must be closed during this test, otherwise false readings will be obtained. Commissioning & Testing (continued) Start-up Checks (continued) 4) As drive belts stretch the most during the first four (4) hours of operation the tension of the belts must be checked and adjustment made after this time.
- Page 17 Daikin Applied (UK) Ltd. Belt Tensioning Instructions Tensioning Forces Belt Section Force required to deflect belt 16mm per metre of span Small Pulley Diameter Kilogram Force 56 - 95 mm 1.3 - 2.0 kg 100 - 140 mm 2.0 - 2.5 kg 80 - 132 mm 2.5 - 3.6 kg...
- Page 18 Daikin Applied (UK) Ltd. Belt Tensioning Instructions (continued) Place the belt tension indicator on top of the belt at the centre of the span. Apply a force at right angles to the belt deflecting it to the point where the lower marker ring is level with the top of the adjacent belt.
- Page 19 Daikin Applied (UK) Ltd. Maintenance Procedures General All maintenance work should be carried out with the highest regard for safety. All work must comply with the Health and Safety at Work Act 1974, all relevant H.S.E. Guidance Notes and Codes of Practice. Only competent personnel must be employed in the maintenance of the unit.
- Page 20 Daikin Applied (UK) Ltd. Note that the control system may allow dampers to operate, live steam or hot water to coils and humidifiers, even though the fan is switched off. Precautions should therefore be taken whilst entering or being inside the unit.
- Page 21 Daikin Applied (UK) Ltd. Maintenance Procedures (continued) Weekly checks 1) Inspect Fans. Clean as necessary (using warm water), and inspect the fan impeller for signs of dust build up on the blades at regular intervals, otherwise out of balance will result. Refer to detailed bearing information and lubricate accordingly.
- Page 22 Daikin Applied (UK) Ltd. Maintenance Procedures (continued) Six Monthly Checks Carry out checks as described under monthly checks and also the following: - 1) Check conditions of bearings and ensure they are not excessively noisy. Note: Faulty bearings must be replaced immediately. Failure to comply may result in the fan shaft becoming damaged.
- Page 23 Daikin Applied (UK) Ltd. Component Installation & Maintenance Fan Installation On receipt check the fan for any damage in transit. Bolt the fan to a level base and ensure that no undue load is placed on the fan casing by unsupported ducting.
- Page 24 Daikin Applied (UK) Ltd. Electric Motors It is advisable to have a monthly inspection of the motor operation. Regular cleaning of the motor is necessary during its service. Care must be taken to prevent moisture, dust, etc. from entering the motor.
- Page 25 Daikin Applied (UK) Ltd. Electric Coil (continued) Maintenance A six monthly check should be performed as follows:- Isolate from mains supply. Check the heating elements for damage (i.e. cracks and ruptures). Check all metalwork for damage. (i.e. cracks and distortion).
- Page 26 Daikin Applied (UK) Ltd. Electric Coil Maintenance (continued) The cut-out sensing bulb needs to be located above the elements. It must not be located to the side or underneath the elements, as this will slow down or even stop the operation of the cut-out when overheating occurs.
- Page 27 Daikin Applied (UK) Ltd. Heating & Cooling Coil Installation (continued) Arrange for dump valves to empty the water from the system before freezing can occur. Inhibition switches should be fitted to prevent start-up without the system being refilled. During installation care must be taken to prevent damage being caused to fins, tubes, headers and return bends of the coil.
- Page 28 Daikin Applied (UK) Ltd. Dust or foreign particles on the fins. Liquid leakage. Heating & Cooling Coil Maintenance (continued) Corrosion on case-work can generally be repaired and painted before significant damage is caused. Significant corrosion on the fins should be investigated before a complete failure occurs.
- Page 29 Daikin Applied (UK) Ltd. Condensate Removal from Steam Coils When air, water, or other product is heated, a modulating steam pressure control valve can regulate the temperature or heat transfer rate. Since pressure and temperature do not vary at the same rate as load, the steam trap capacity, which is determined by the pressure differential between the trap inlet and outlet, may be adequate at full load, but not at some lesser load.
- Page 30 Daikin Applied (UK) Ltd. Condensate Removal from Steam Coils (continued) Vacuum breakers must be installed between the coil and the trap inlet to ensure that the hydraulic head drains the coil when it is at atmospheric or sub-atmospheric pressure. The vacuum breaker should respond to a differential pressure of no greater than 750pa (3in.
- Page 31 Daikin Applied (UK) Ltd. Commissioning Before commissioning, ensure that the air streams can flow freely through the plate heat exchanger. If dampers are fitted, check their movement and correct adjustment. Furthermore, check if installation has been carried out correctly and make sure that the application limits (temperature, pressure difference, material, etc.) can not be exceeded.
- Page 32 Daikin Applied (UK) Ltd. be taken to ensure that the correct type of drain trap is used depending on whether it is positive or negative air pressure within the heat exchanger section. Drain lines from the trap must be pitched downwards, a slope of 1:25 is recommended. For details of drain trap sizing for both types refer to drawing A4-500628.
- Page 33 Daikin Applied (UK) Ltd. In general the cycle of servicing the pre-filter cells, replacing the filter pads and Dri- pak cartridges, as applicable, will depend upon the amount of dust in the air, the number of hours of operation and the final resistance across the filter bank.
- Page 34 Daikin Applied (UK) Ltd. A set of Operating and Maintenance Instructions for the gas burner will be provided separately. Before the burner is commissioned the client must ensure that the correct gas pressure is available and is connected, and that all electrical and control supplies and connections are made.
- Page 35 Daikin Applied (UK) Ltd. Symptom Causes Remedy Failure of fan to start Electrical supply fault to fan Check voltage at motor terminal box whilst observing all safety precautions Check starting gear and fuses Check motor Low volume after Fan rotating in wrong direction...
- Page 36 I.E.E. Regulations and local bye- laws. Failure to notify Daikin Applied (UK) Ltd of equipment damaged on receipt in writing within seven (7) days. Failure to run equipment within the design specifications as notified at the time of order.
- Page 37 Daikin Applied (UK) Ltd. Ref :- OM 001 / 01 Disposal of AHU parts at end of Lifespan Commodity Advised Route Comments Aluminium Extrusion Recyclable Foam Filled Panels Landfill Sheet Steel Recycle Motors Recycle or Landfill Corners Recycle Coils Recycle...