Safety Symbols

1.1. The following symbols mean: 

Warning: read instructions to understand possible hazard

fig2.jpg

Danger: electrical shock hazard

1.2. Use only as specified by the operating instructions or the equipments intrinsic protection may be impaired.

Safety Warnings

Always observe the following safety precautions

2.1. Only connect to an earthed supply - This unit is Class 1 construction and must be earthed!

2.2. Connect only to a power supply with a voltage corresponding to that on the rating plate.

2.3. Always disconnect the equipment from the mains and ancillary units before removing covers.

2.4. The equipment is heavy; use lifting aids.

2.5. This equipment is for use indoors in moderate climates only. NEVER use the equipment in damp or wet conditions.

2.6. Avoid excessive heat, humidity, dust & vibration.

2.7. Do not switch the unit on when it may be subjected to dripping or splashing liquids on components not designed for that environment.

2.8. Always use the mains lead supplied.

2.9. Before replacing a fuse Disconnect the equipment from the mains supply.

2.10. Ensure that the mains IEC socket is easily accessible to allow the unit to be isolated.

Operating Conditions

3.1. This equipment is for indoor use with maximum relative humidity of 80% and is safe for use in an ambient temperature up to 40°C.

3.2. The equipment is for operation at Installation Category II (transient voltages) and Pollution Degree II in accordance with IEC 664-1 at altitudes up to 2000m.

3.3. Size and weight - refer to sales brochure.

3.4. Supply voltage range - refer to unit identification label

3.5. Supply power rating - refer to unit identification label

3.6.

3.7. Approved accessories - condensate pump - refer to office.

3.8. The product is designed to comply with EN 61010-1 and can be flash tested. The product is fitted with radio frequency interference suppressors, therefore it is recommended that only a D.C. test be performed.

Off-Loading and Lifting

4.1. The units are supplied on pallets unless otherwise specified, and should be off-loaded from the delivery vehicle using a forklift or similar equipment.

4.2. Under no circumstances should the units be handled in such a way as to cause damage to coil pipework connections, spigots, drain trays. When wrapped, the drain tray and coil pipework in particular has the appearance of a lifting point - this must be avoided.

4.3. PPE and maximum lifting weight guidelines must be followed - this will mean a four person or machine lifting operation for individual larger units.

Pre-Installation Storage

5.1. Pallets of fancoil units must not be stacked on top of each other. Units must not be stacked more than 5 high on a pallet or on the ground. Units of greatly differing size must not be stacked together more than three high. Intermediate packing to prevent drain connections damaging adjacent units must be maintained. These are all precautions for the avoidance of casing distortion and damage by overloading.

5.2. Prevention of Static Indentation - Machines fitted with bearing races may be damaged if left under inappropriate conditions for long periods. The races may suffer damage by fretting (false brinelling, stationary vibration marking) causing low frequency noise when commissioned and run. Consequently, no motor should be permitted to stand long term on a vibrating floor while in storage.

5.3. All inlets, discharge openings and pipe openings must be completely sealed.

5.4. The units are delivered packed in bubble wrap folded and oriented such that water splash can drain away and not be collected or held in the packaging. In addition to this, they must be protected with a site provided over cover, from building rubble, dust, dampness and extremes of temperature. The unit exterior surfaces must be inspected on a monthly basis and any signs of corrosion, scratches or other damage must be treated immediately.

Unpacking and Inspection

6.1. Remove pallet band wrapping and dispose of it immediately. Unwrap the unit.

6.2. If the equipment appears damaged in any way, obtain return agreement and return it to us in its original packaging. No responsibility for damage arising from the use of non-approved packaging will be accepted.

6.3. Ensure all items and accessories specified are present. If not, contact our office.

6.4. Recycle packaging. 6.5. Retain these instructions.

Fancoil Unit Installation Specification

7.1. To achieve the quoted noise performance, the fancoil unit must be installed in accordance with the following installation specification. NR’ predictions quoted are intended as a guide to levels which can be expected, if the following instructions are complied with:

7.2. Units must be mounted correctly using rubber washers, onto a solid structure.

7.3. The 230mm deep unit should be mounted into a false ceiling not less than 300mm deep (subject to additional space required for ancillaries/options), constructed of a standard ‘T’ bar grid with 10mm thick fiber board tiles.

7.4. Rooms of open plan or partitioned design should be furnished, carpeted and have no more than 20% glass area with no highly reflective surfaces.

7.5. Where a single unit is serving a room, the room dimensions should be as detailed on the separate test configuration.

7.6. Units serving an open plan area should be mounted at a minimum of 3m centres and return air grilles should not be positioned directly below unit intakes.

7.7. At least 1m of acoustic flexible ducting must be used on each spigot outlet, with an acoustically lined diffuser plenum.

7.8. A maximum air velocity at 3.0m/s per inlet/outlet spigot for the quoted NR.

7.9. A correct installation should give the predicted Lp at 1.5m from the nearest diffuser.

For accurate sound assessment, it may be necessary to obtain confirmation from an acoustics specialist, in which case please refer to our Customer Service Office.

Installation

Additional documents relating to the installation of this equipment:

8.1. Fancoil Product Catalogue

8.2. Fancoil Quotation Selection Program and Quotation Technical Order Schedule

8.3. Fancoil wiring diagram as identified on the fancoil sales paperwork

8.4. Fancoil Condensate Pump Guide (when relevant)

8.5. Johnson Controls FAC or TUC controller, valve datasheets and Installation Operating & Maintenance Instructions

8.6. Guides and regulations relating to electrical and water services in the installation region.

8.7. Detailed Component Information later in this document

8.8. Before installing the units in position, ensure that suitable access is available for routine maintenance and the removal of such items as coils, fans and filters.

8.9. Ensure that the intended mounting surface is able to bear the weight of suspension of the unit (plus momentary and incidental loads) from the structure using suitable fittings.

8.10. Ensure any required space around the unit is observed.

8.11. Lifting into position at high level must be carried out using a scissor lift table or similar equipment.

8.12. Ensure all cables are routed safely to avoid sharp bends and pinches.

8.13. Ensure that only specified cables are used for interconnection of equipment.

8.14. The mains cord set is 2m long and has flying leads. Strictly observe the following wiring convention: Green & Yellow = Earth. Brown = Live. Blue = Neutral.

8.15. All units must be installed in accordance with good engineering standards and due care and attention to eliminate any possible damage. The installer must ensure level positioning to facilitate correct operation and condensate removal.

8.16. Horizontal unit (series EHW) recommended method of suspension is M10 studding, complete with 25mm diameter form ‘C’ washers and 28mm diameter x 3mm thick rubber washers (supplied by others). Note that the suspension rod nearest the controls enclosure needs to be cut accurately to length before installation.

8.17. Vertical units (series EVW) should be mounted using the back plate keyhole fixing points onto a vertical flat, solid surface, such as concrete or brick wall, so they are not subjected to undue stress or distortion. They must be checked for accuracy of horizontal levelling, and set with a slight bias to promote correct condensate removal.

8.18. All connecting ductwork must be independently supported from the fancoil unit spigot connections in accordance with DW 144

8.19. All site pipework must be supported near to the fancoil unit and must not place loading on the drain tray support bracket, valve set and coil connections.

8.20. Wiring to comply with all relevant British Standard Codes of Practice and good engineering principles.

8.21. Once the units are installed and prior to commissioning, they must still be protected from damage and the ingress of foreign bodies, in particular to the pipework, spigot connections and filters.

8.22. The drain tray connection on horizontal units can be rotated to suit the direction of the drain pipework. Drain tray connection fittings should not cause condensate to be held back in the tray. The clear inspection hose and jubilee pipe clips provided should be used for strain relief. Condensate drain pipework must be independently supported at the end of the clear hose and must be laid to fall from the fancoil.

8.23. Connections must be the correct flow and return as marked for performance, for venting of air and draining for maintenance.

8.24. Units should not be filled with water until the building envelope is closed and all likelihood of freezing is eliminated. Note that coils cannot be constructed to drain completely due to installation constraints, and precautions should be taken against residual water in the coil after draining especially during lifting down for replacement - distraction from spillage could lead to an accident from height.

8.25. Units should not be filled with water until the system is otherwise ready to use, stagnant water in the control components for an extended period can result in biological growth, contamination and blockage.

8.26. Check for any treatment that is required to the water supply for the prevention of corrosion of the equipment. The materials of construction in contact with the water are copper tubes, brass fittings & valve bodies, stainless steel valve stems and a glass fibre reinforced composite assembly - PA6T/6I (40% GF) - with minor components in ETFE and EPDM .

8.27. An EC/DC motor can be damaged by a power surge. Ensure that the site power supply is stable before electrically connecting the fancoil. Do not commission or operate the unit while the site is supplied by a generator.

Installation Checks

10.1. Further to good industry practice the following measures are intended as a guide to achieving commissioning in accordance with the design requirements.

10.2. An individual unit commissioning “checklist”should be completed during this period:

10.3. Ensure the units installed correctly and undamaged.

10.4. Ensure that all unit openings are thoroughly clean and free from installation debris, the filter is clean and free from dust. Never run the fans without the filter in place.

10.5. Ensure that all access panels and blanking plates are in position and secure.

10.6. Ensure that all electrical wiring complies with BS7671 and local by-laws and that all components, where applicable, are provided with all necessary safety, protection and isolating devices.

10.7. Check that the coil faces are free from any debris and check all coil connections for leaks.

10.8. Ensure that all air is vented from both coils and from the systems generally.

10.9. On horizontal units check that the drain tray is correctly aligned in the coil tube plates, that the drain connection opening is part under the valves and part under the fin block and that both ends fall to drain - see detail drain tray section later in this document.

10.10. Start the fans slowly under ‘pot’ control (see the section in this document on the fans) and confirm air flow at the discharge to the room. Increase flow to maximum briefly and compare a simple volume test with catalogue maximum value.

10.11. With a clean filter in place, check that the unit air volume and the external pressure are as design.

10.12. Check that the motor full load current is less than the unit nameplate value.

10.13. After initial start-up and some continuous running of the unit, it is recommended that the following are checked; the motor full load current, the filter condition, the condensate drain for free flow & no leaks. Check the valve connections for leaks.

Control, Wiring and Comissioning

11.1. Units intended for isolated standalone use require no communication interconnection wiring. Controls commissioning is completed by direct access to each controller. For the FAC2612 this can be wireless, using a Bluetooth interface device available separately at additional cost.

11.2. Units for networking as local master/slave sets, or as part of a BMS system must be interconnected using approved materials and techniques.

11.3. Limited on site commissioning is required. Fan speed is normally controlled by the unit mounted BACnet controller, in coordination with the BMS head end. Otherwise manual setting is done using the onboard potentiometer. To minimise installation noise, ensure that any regulating devices in the index duct are fully open. As the filters become dirty, air flow will diminish. If the filters become very blocked,excessive noise and condensate leakage can occur.

11.4. A 0-10 volt potentiometer is provided for factory testing and site commissioning of the fans. A BMS derived 0-10 volt signal can be used instead of the potentiometer and a switch is provided to change between the two. The control voltage potentiometer must be adjusted in the range 2 to 8 volts (measuring instrument required) or as required to achieve the desired volume. To minimise installation noise, ensure that any regulating devices in the index duct are fully open.

11.5. BEWARE if not correctly set up, the potentiometer (and BMS controllers) can provide a control voltage (legitimately used for ‘heating only’ and for process fan coil units), which is beyond the safe operating range of standard office conditioning units - noise and condensate carryover can occur.

11.6 Harmonic filters are fitted to limit power supply distortion to below levels specified by European regulation.

11.7. Refer to product catalogue for description of water flow control components.

Maintenance

12.1. Refer all consumables replacement and repairs to qualified service personnel.

12.2. Clean the main chassis with a damp cloth. Do not wet or allow moisture to penetrate the unit. DO NOT USE SOLVENTS. Do not use solvents or lime scale removal products on the drain tray that are likely to adversely affect the rubber.

12.3. The mains power fuse is contained in the IEC socket drawer along with a spare. There are also fan power and control fuses in bayonet housings. Each fuse must only be replaced with a fuse of the type and rating marked.

12.4. If a replacement fuse fails immediately, contact us using the details given below. DO NOT replace with a higher value.

12.5. The unit is designed to comply with EN 61010-1 and can be flash tested. The product is fitted with radio frequency interference suppressors, therefore it is recommended that only a D.C. test be performed.

12.6. The drain tray is stainless steel and is designed for periodic removal for cleaning. Ensure that the rubber corner inserts (4 on EHW, 2 on EVW) are not displaced during cleaning.

12.7. Filter removal, cleaning and replacement - see component detail below.

12.8. There are no routine fan maintenance requirements. Very long term, impeller dust removal may be beneficial.

Product Code and Overview EHW230 and EVW230

13.1. E - EC/DC fans

13.2. H - Horizontal Chassis

13.3. V - Vertical chassis

13.4. W - Waterside control

13.5. 230 - Nominally 230mm deep (drain connection, and the drop plenum option for 250mm diameter spigots increase this depth)

13.6. Series EHW fancoil units are cooling and heating units, factory wired and tested and designed for horizontal installation within a false ceiling void.

13.7. Series EVW fancoil units are for vertical wall mounting and are available in a non-cased option (for concealment behind an architectural enclosure) or with additional painted case (for exposed mounting). Control options are restricted when a case is required.

13.8. EHW units are draw through the coil matrix, EVW are blow through, suitable for operation against moderate duct resistance. The direct driven fans are mounted internally on a rigid bulkhead, vibration isolated from the casing via rubber grommets. The fans discharge into a acoustically treated discharge plenum complete with circular spigots.

13.9. All units are Waterside Control, using chilled water cooling, medium and low pressure hot water heating.

13.10. Unit casings are manufactured from galvanised sheet steel, fully insulated both acoustically and thermally with class ‘O’ CFC and HFC free open cell foam.

13.11. The coils are located above a one piece stainless steel insulated condensate tray with fall to drain.

13.12. Filters are either washable continuous filament media in a galvanised steel frame, supported with steel mesh and spring clip or vacuum cleanable metal mesh.

13.13. Fan access is via an insulated full width panel. Refer to actionair hydropac product catalogue for general specification and design data.

Product Component Detail

14.1. Filter

14.1.1. The filter is provided to protect the coil and fans against permanent degradation in performance by fouling. The fancoil unit must never be run without the filter fitted. Room air cleaning for occupants is a secondary benefit.

14.1.2. Filters must be properly maintained in order to ensure air cleaning efficiency and good air flow. Dirty filters will reduce the air volume handled by the unit, reducing cooling and heating performance. A blocked filter can potentially cause noise and moisture carry over into the fans.

14.1.3. The length of time between cleaning of filters is dependent upon the installed environment. A three month initial cycle of inspection is normal for an office environment, revised later based on experience.

14.1.4. The standard filter is a washable EU3 continuous filament filter pad media to Eurovent 4/5, with F1 fire resistance to DIN 53438 and a dust holding capacity of 340g/m2, housed in a galvanised steel channel frame with steel support mesh. Metal mesh filters are an alternative option.

14.1.5. On series EHW the filter is held in place by a return edge on the fancoil unit top plate and an angled bracket each end of the filter. Removal by slackening the two screws holding the retaining angle and lowering sufficiently to permit the filter to be lifted clear of the keyhole slots.

14.1.6. The air filter pad can be emptied by gently tapping or removing loose dust with a low power vacuum cleaner. To wash the filter pad remove it from the frame, fully immerse it in water containing a mild detergent, rinse in clean water and allow to dry thoroughly before replacing into the filter frame with a steel rule (beware sharp edges – wear gloves designed for handling thin sheet steel).

14.1.7. Optional fine mesh filters can be vacuumed in situ.

14.1.8. Where ducted return/inlet plenums are fitted to series EHW horizontal units, the filter is accessed through a removable panel on the underside of the plenum. The filter frame is held between foam blocks and does not require keyhole mounted retaining brackets.

14.1.9. Series EVW the filter frames are held in position in two horizontal guide channels beneath the front access panel.

14.2. Fan Access Panel & Filter Access on Vertical Unit

14.2.1. On the underside of the horizontal fancoil and on the front face of the vertical fancoil. Held in place by 4-6 roof bolts (undo 5 turns) in keyhole slots. The ceiling gri under horizontal unit access panel can cross the panel as there is room to manipulate the fan deck (or remove the fans individually). Structures in front of the vertical unit access panel must be removable as the filter and the fan deck/drain tray slide out 230mm before they are free for manipulation in other planes.

14.3 Fans

14.3.1. The direct driven fan/motor assembly is rated at 50,000 hours at full load and contains no replaceable or serviceable subassemblies. Fans include internal self protection devices. Our unit fans run at 50-80% full speed for normal application design duty. Design duty occurs for startup, but otherwise for 25% of the year, so for units running on Load Dependant Fan Control, the fans are running well under plate rating for the great bulk of their operating time. On normal office hours under this regime, 80,000 hours or an average of over 30 years mechanical life is predicted.

14.3.2. Units contain 1, 2, 3 or 4 fans depending on chassis size and duty. The fans are not linked mechanically, the wiring is a daisy chain loom. The electrical failure of one fan will not necessarily halt the operation of others, but it may provide a short circuit air path back across the fan deck, degrading the overall air performance value expected from one fan. To confirm fan operation remove the access panel and observe them starting, there is a three second delay after initialisation. Do not run the fans for more than a few seconds without the access panel.

14.3.3. Fans may be set to run at a constant speed or they may run at variable speed to suit demand. They are controlled with 0-10vdc signal that can be generated on board with the potentiometer provided, or the fitted intelligent controller. A switch near the potentiometer selects the mode. At less than 1V, the fans stop but remain live 230V only complete electrical isolation of the fancoil unit making them safe to work on.

14.3.4. Fan Troubleshooting - after confirming the filter is clean and that there are no obstructions to flow or other faults external to the fancoil unit. Set up current measurement instrument external to the fancoil unit, move the ‘BMS/pot’ mode selection switch to ‘pot’, set the potentiometer midway and restore power to the unit. After three seconds air flow should begin. Checks: check that the full load current of the unit is within the nameplate rated value, and that it reacts to adjustment of the potentiometer. If a fan fault is suspected, isolate the unit and check that the impellors are running freely.

14.3.5. To remove an individual fan (3kg), or a fan deck assembly (5kg/fan), the following procedure must be adopted:

14.3.6. Isolate the electrical supply.

14.3.7. Remove the access panel (take a photo of the fan orientation as a record for reinstallation).

14.3.8. Individual fan removal:

14.3.9. Disconnect the wiring loom from the two 300mm long fan leads (three pin and four pin connectors).

14.3.10. Check for cable ties fixing the fan leads to the fan deck - cut where necessary.

14.3.11. Support the fan while removing the two M6 bolts connecting fan scroll to fan deck.

14.3.12. Remove the fan from the unit through the access opening, taking care not to damage the impellers.

14.3.13. Complete fan deck removal (two man and/or support trestles required):

14.3.14. Disconnect the fan loom from the back of the electrical panel (refer to the relevant section in this document and the project wiring diagram)

14.3.15. Identify the four M6 roof bolts (two each end) on the outside of the unit in the recess near the side spigots; remove the lower two and replace them with cross head screwdrivers. Loosen the upper two. Prepare to take the weight of the fan deck, steady it, remove the two remaining screws, then remove the safety screwdrivers and lower it to the trestles/ground.

14.3.16. Manipulating the assembly on the screwdrivers removes the uncertainty associated with the length of the screws/degree to which the casing and thermal/acoustic insulation can grip and suddenly release the deck.

14.3.17. To re-install, follow the reverse procedure, noting that the deck is set at a small angle off verticalin the chassis. Aligning the lower holes on screwdrivers first with the deck tipped slightly back towards the coil, allows the final few degrees of rotation of the deck to align the top screws to be achieved more easily.

14.4 Condensate Tray

14.4.1. The following relates specifically to the horizontal ceiling mounted unit. Additional notes relating to the simpler process for the vertical wall mounted unit are placed at the end.

14.4.2. The stainless steel condensate collection and drain tray is designed for easy removal for cleaning. It has a 19mm o.d. plain connection that can be rotated to the direction taken by the drain pipework. Use the section of clear tube and the two jubilee clips provided for ease of disconnection, strain relief and vibration isolation. The site pipework should be supported near to the join with the clear tube and sloped to fall to drain.

14.4.3. Drain tray cleaning interval will depend on the installed environment. Annual inspection is recommended.

14.4.4. Removal of the drain tray will reveal the underside of the coil which should also be cleaned. Internal metalwork should be inspected for corrosion and painted with a zinc rich paint as necessary. (The sacrificial consumption of the zinc plating on galvanised sheet steel ends eventually and corrosion of the mild steel begins).

14.4.5. The drain tray hangs in four slots formed at the bottom of the two coil end plates. There are gaps in the top folded return of the drain tray. Lateral movement of the tray is restricted by two screws at the bends end. To remove the tray, it must slide laterally away from the coil header end until it drops away. The full procedure is as follows:

14.4.6. Precautions are need to protect the area below the fancoil unit.

14.4.7. Isolate the electrical supply.

14.4.8. Remove the return air filter.

14.4.9. Disconnect the drainpipe from condensate tray after ensuring that all water has been drained off.

14.4.10. Loosen the fan access panel and back it away from the tray 2-3mm on its keyhole slots (not essential but will make sliding the tray easier.)retighten two or three screws to make safe.

14.4.11. Remove the outer M6 retaining screw in coil plate work at coil return bends end of the tray Screw in the inner one 20mm (it limits the travel of the tray in the direction of the coil headers) Remove the M6 screw at the bottom of the outer valve set support plate. The valve support upper frame must be left in place.

14.4.12. Slide the condensate tray approximately 10mm towards the bends end while supporting it. The connection/headers end of the tray will then be free to drop away from the coil. Slide the tray further towards the bends end and the bends end of the tray will drop off the coil plate work.

14.4.13. Normal domestic cleaning products to be used, avoid anything that might degrade the rubber corner inserts or the ‘o’ ring that seals the rotating drain connection. Check that the four rubber corner inserts are present at completion of the process. Beware that some slow dissolving sterilization tablets can be corrosive.

14.4.14. To reinstall, follow the reverse procedure. After refitting the drain tray, test the fall to drain by slowly adding 250ml of water at the bends end and also over the headers. No pooling should be evident near the rubber corner inserts at either end. There is a total of 14mm of tray end lift on the horizontal unit thanks to the crease across it which must be distributed approximately 10mm under the coil and 4mm under the headers by altering the nut positions on the ceiling drop rods. The tray mounting slots in the coil plates differ 10mm in height so a nominally horizontal chassis will promote this levelling, but the drain function must still be tested and adjusted. Coil/chassis levelling across the air flow direction is less important, it will be satisfactory if the tray is right, the chassis must be level in direction of air flow.

14.4.15. Maximum condensate generation rate for a large fan coil is 5 l/hr (this equates to three minutes to pour in a coffee mug full). The condensate drain is not designed to accommodate full bore mains or coil flushing - provide alternative temporary drainage for that. Mino residual water retention in the tray around the connection is common due to the meniscus effect of water on a non wetting surface.

14.4.16. The vertical unit drain tray is also the fan deck.

14.4.17. Remove the front access panel.

14.4.18. Disconnect condensate pipework.

14.4.19. Disconnect wiring loom.

14.4.20. Slide out complete tray/fan deck towards the room, whilst preparing for its weight (4 fans = 20kg).

14.4.21. Note that on reinstallation, on larger units, the centre back of the fan deck goes above a support angle on the unit back plate.

14.4.22. Levelling of the whole unit should produce just enough fall to the headers end to encourage drainage.

14.5 Cooling and Heating Coil Block

14.5.1. Both coils are always present in the assembly. It is one continuous fin and tube matrix with 36 tubes circuited to the cooling headers and 4 to the heating headers. (34/6 on largest units). Either coil can be used in isolation.

14.5.2. In general, the circuitry is contraflow, the entering air meets the leaving water and vice versa, but geometry sometimes prevents complete adoption of this principal.

14.5.3. Water flow is to the coil connection on the header connected to the bottom of the coil circuits, rising through the coil to leave at the top (return), taking air with it. The connection on the return header may be low down, but it is the only water path at that point so the air is removed.

14.5.4. Coil matrix blocks are manufactured from seamless copper tube mechanically expanded into aluminium fins having die formed collars providing a tight bond to optimise heat transfer. Vents and drains are fitted as standard with slotted/hexagonal plugs. Coils are pressure tested using dry air under water to 15 bar.

14.5.5. The coil should be inspected, at the same time as cleaning the filter, to ascertain if any solids or foreign matter has accumulated between the fins. The coil connections should be checked for leaks. Severe fin fouling is an indication that the filter is not working correctly.

14.5.6. Coil cleaning to be by soft brush and a mild detergent solution. Great care must be taken not to damage the fins, nor introduce liquid into fan windings or to soak the insulation.

14.5.7. Aluminium fins in contact with city air, and moisture from condensation, will eventually corrode but a 15-20 year useful life can be expected. Proximity to coastal salinity will accelerate corrosion.

14.5.8. Water straining and treatment to prevent acidity in the boiler and chiller circuits will prolong the life of the copper heat exchange tubes. Life expectancy is 15-20 years under normal conditions.

14.5.9. To remove the coil assembly from the unit the following procedure must be adopted;

14.5.10. Isolate the electrical supply.

14.5.11. Isolate flow and return pipework to both heating and cooling connections.

14.5.12. Drain down both heating and cooling coils.

14.5.13. Remove flow and return pipework to valves and condensate pipe.

14.5.14. Disconnect control component wiring.

14.5.15. Remove control valve assembly from coil connections.

14.5.16. Remove drain tray as previous section of the document

14.5.17. Support weight of coil and remove the six M6 bolts holding the coil to the rear of the unit.

14.5.18. To reinstall, follow the reverse procedure.

14.5.19. Refill the coil and vent air.

 

14.7 Control Housing

14.7.1. Comprises a flat plate assembly with components not requiring installer access on the back in the fan plenum, The Johnson Controls intelligent controller, fuses, switch and potentiometer on the front is accessible from outside the unit.

14.7.2. A tethered cover complete with unit identification and CE/safety marking is provided to protect the controller and is fitted on two tabs followed by a retaining screw. An internal cover is provided over the harmonic filter and the 24vac transformer, held in place by a 50mm set screw on the outside of the panel, near the main power plug.

General and Warranty

15.1. Warranty period is 24 months from date of despatch. The following acts/omissions may render warranties void:

15.2. Failure to install, set up, or put to work any part of the equipment as specified in these guidelines.

15.3. Operation of motors and other electrical equipment with an electricity supply other that than designated on the nameplate or failing to connect and protect such equipment in accordance with IEE regulations and local byelaws.

15.4. Failure to notify us in writing of equipment damaged on receipt within three days.

15.5. Failure to comply with the our general terms and conditions of sale.

15.6. Failure to run equipment within the design specification as notified at the time of order.

15.7. Any modification to the designed arrangement, system layout or performance without our prior written approval.

15.8. Damage caused to equipment on site through lack of adequate protection from the elements, manhandling or misuse by other trades.

15.9. Failure to observe all normally accepted engineering practices during installation, commissioning and subsequent operation of equipment.

Standards Regulations and References

16.1. CIBSE publication TM43 Fan Coil Units 2008 ISBN9781903287903

16.2. BSRIA IEP 4/2004: Supporting services from structure

16.3. HVCA DW144: Specification for sheet metal ductwork BS4856-4:1997 Methods for testing and rating fan coil units, unit heaters and unit coolers. Determination of sound power levels of fan coil units, unit heaters and unit coolers using reverberating rooms.

16.4. BS EN 779: 2012 Particulate air filters for general ventilation. Determination of the filtration performance.

16.5.The Building Regulations 2010 Approved Document L – Conservation of fuel and power.

16.6. This document is subject to change without notice due to continuing research and development.