Waterside Control Fan Coil Units

Transcription

1 Issue A, Devember 2011 Waterside Contro Fan Coi Units Horizonta Chassis Type - EPIC Range EPIC the most energy efficient fan coi unit utiising an ECM motor

2 Company Profie Fan Coi Unit Overview Advanced Air and Naior Industries have over 10 years experience in manufacturing bespoke and project specific fan coi units. As a resut Advanced Air have invested in the deveopment of the atest range of energy efficient and versatie fan coi units in accordance with today's buiding reguations. Advanced Air UK factory and technica centre of just over 60,000 sq ft Advanced Air are part of the Naior Industries Group in the USA and some of the key factors are:- Turnover 80m Empoyees 750 Laboratories and Test Ces 6 Tota factory area 600,000 ft 2 In the UK Advanced Air manufacture:- Fan Coi Units Gries and Diffusers Chied Beams Fire and Smoke Dampers Voume Contro Dampers Eectrica Contro Panes VAV Termina Units The investment in R & D means there is a continuous fow of new products and upgrades to existing units. Speciaist customer testing and mock ups undertaken in BSRIA approved aboratories Advanced Air s design team offer fu technica support to assist with your system design incuding the Air Distribution Equipment and co-ordination from concept through to deivery to site. Our service department aso offer a fu after saes service and maintenance contracts if required. EPIC Fan Coi Units 280mm high A unique ECM horizonta mounted fan to give the most energy efficient soution with specific fan powers down to 0.15w//s. 2 R & D Faciities

3 EPIC Fan Coi Units The EPIC fan coi range provides the designer with the opportunity to achieve very ow specific fan power eves (SFP). This is becoming an increasingy important issue as successive buiding reguations sash the aowabe tota carbon emission from a buiding. Dispay Energy Certificates (DEC) show the specific buidings carbon emissions as cacuated by approved software. The appearance is simiar to the energy abeing of domestic eectrica appiances. If a simiar abeing system was used for individua components in an air conditioning system the ratings for fan coi units coud ook ike the abe beow. Energy Effciency Rating - Fan Coi Unit High energy efficient - ower carbon emissions CAV EPIC VAV EPIC EC-DC The unique horizontay mounted ECM motor gives many benefits which may be summarised as foows:- The most energy efficient fan coi unit EC-DC Infinitey variabe speed AC DECK AC ERM Low energy efficient - high carbon emissions SFP is a measure of how efficienty the fan moves the air over the heat exchangers within the fan coi unit. Beow is a simpe tabuation:- Motor Air Voume W SFP Type (Constant) /S W//S ECM (EPIC) EC - DC AC DECK AC ERM Variabe air voume can be easiy achieved with further savings in energy consumption Singe motor as opposed to mutipe motors means greater reiabiity Lower ife time costings compared to conventiona fan cois Lower noise eves Abiity to pre-set air voumes at the factory and fuy commission the unit Independenty tested to British & European Standards, Eurovent 6/3 and ISO/TC86/SC6 The SFP is simpy /sec divided by the power consumption of the motors in watts. 3

4 Variabe Air Voume - VAV For the ast 40 years virtuay a fan cois have been constant fan speed and consequenty constant air voume (CAV). Any changes in cooing or heating were adjusted by the water vave, i.e. varying the water voume. However with the fans running at fu speed a of the time this is a needess waste of energy. By varying the air voume, significant reductions in energy can be achieved and typica vaues for a wide range of constant and VAV fan cois is shown in the energy comparison graph Contros The contro phiosophy is reativey simpe as can be seen from the diagram beow. At maximum cooing the fan is running at 100% with the water vave fuy open as the cooing oad reduces the fan air voume is reduced down to a minimum of 60%. If the cooing oad reduces further the water vave is progressivey cosed unti the dead band is reached. In other words the fan air voume is reduced first foowed by a progressive reduction in the water cooing voume. On heating the eary morning boost has 100 maximum air voume and heating. On the heating cyce the air voume is kept 80 Water constant to ensure there is no stratification within the room. The heating requirement is usuay a short period just prior to Air/Water % Air occupation of the buiding and therefore does not significanty impact on the carbon emissions Heating Dead Band Cooing 4

5 EPIC Fan Coi Units - ECM Technoogy Energy efficient brushess DC motors, as incorporated into Advanced Air s EPIC fan coi units, give energy savings that reduce the fan power to amost a ¼ of that taken by a comparabe permanent spit capacitor (PSC) motor. This resuts in a cooer running motor that transfers ess heat to the suppy air. Factory setting of air voume can be set direct from the BMS system or through the in-buit unique EPIC contro card modue. The voume can be set by a 0-10 vot contro signa which, via a contro system, is idea for the utiisation of VAV capabiity to suit varying occupied space oads. Due to its smart motor technoogy the fan is sefcommissioning as any change in externa resistance is recognised by the smart controer and the fan automaticay compensates to achieve its set point. The step-ess dynamic speed contro compared to standard step contro gives greater operating range and more fexibiity. The smart motor has feedback capabiities which via the BMS can be used to indicate dirty fiters and can be programmabe to suit varying room condition oads. Soft start and sewed speed ramps are programmed into the ECM motor which eiminates stress to the mounting bracket or hardware. This is one of the factors in higher ife expectancy of 90,000 hours (approximatey 20 years) compared to the expected 50,000 hours (10 years) of typica PSC motors, resuting in fewer faiures and ower maintenance costs for the ife cyce of the buiding. Speed Speed Time Brushess DC Motors No In Rush Current on Start Sewed Speed Change Energy Efficient Brushess DC motor. Significant Energy Savings Unique Factory Pre-set Air Voume Capabiity (+/ 5%) Pressure Independent Fan Operation On-site Adjustabe Fan Air Voume Controer Remote Fan Air Voume Adjustment Capabiity From BMS Time Permanent Spit Capacitor Motors In Rush Current on Start - Can be up to 5 times run current Impuse Speed Change 5

6 EPIC Fan Coi Units - Therma Performance Data Cooing Heating NR Guide* Size Airfow Tota Sensibe Water Hyd Tota Water Hyd 185mm 400mm /s Pc - kw Ps - kw Fow kg/s Resistance Ph - kw Fow kg/s Resistance Standard Long Long kpa kpa Attenuator Attenuator <25 <25 < <25 < <25 < <25 < < Performance Notes: Cooing - Air On 23 o C, 50% RH ChW 6 o C fow, 12 o C return Heating - Air On 20 o C, Air Off 30 o C Maximum LPHW 70 o C fow, 55 o C return *Pubished NR figures shoud ony be used as a quick reference guide to assess the acoustic performance of Advanced Air s fan coi units. It is recommended that acoustic anaysis using the sound power eves shoud be conducted to suit specific project requirements. For further detais, pease contact Advanced Air Saes.

7 EPIC Fan Coi Units - Therma Performance Data Cooing Heating NR Guide* Size Airfow Tota Sensibe Water Hyd Tota Water Hyd 185mm 400mm /s Pc - kw Ps - kw Fow kg/s Resistance Ph - kw Fow kg/s Resistance Standard Long Long kpa kpa Attenuator Attenuator <25 <25 < <25 < <25 < <25 < < Performance Notes: Cooing - Air On 23 o C, 50% RH ChW 7 o C fow, 14 o C return Heating - Air On 20 o C, Air Off 30 o C Maximum LPHW 70 o C fow, 55 o C return *Pubished NR figures shoud ony be used as a quick reference guide to assess the acoustic performance of Advanced Air s fan coi units. It is recommended that acoustic anaysis using the sound power eves shoud be conducted to suit specific project requirements. For further detais, pease contact Advanced Air Saes. 7

8 EPIC Fan Coi Units - Therma Performance Data Cooing Heating NR Guide* Size Airfow Tota Sensibe Water Hyd Tota Water Hyd 185mm 400mm /s Pc - kw Ps - kw Fow kg/s Resistance Ph - kw Fow kg/s Resistance Standard Long Long kpa kpa Attenuator Attenuator <25 <25 < <25 < <25 < <25 < < Performance Notes: Cooing - Air On 23 o C, 50% RH ChW 12 o C fow, 17 o C return Heating - Air On 20 o C, Air Off 30 o C Maximum LPHW 70 o C fow, 55 o C return *Pubished NR figures shoud ony be used as a quick reference guide to assess the acoustic performance of Advanced Air s fan coi units. It is recommended that acoustic anaysis using the sound power eves shoud be conducted to suit specific project requirements. For further detais, pease contact Advanced Air Saes.

9 EPIC Fan Coi Units - Acoustic Performance Data Discharge Sound Power Leves db Radiated Sound Power Leves db Airfow Size /s Octave Band Centre Frequency Hz Octave Band Centre Frequency Hz k 2k 4k 8k k 2k 4k 8k Performance Notes: 1.Fan discharge (externa) static pressure is 30 Pa in a cases. It is the difference ( Ps) in static pressure from fan coi unit discharge to the room. 9

10 Dimensiona Data 1000mm 53mm 908mm Standard EPIC Unit Size Dim A Dim B Dim C Weight (mm) (mm) (mm) (kg) Dimension B Case Width Dimension C Fixing Centres Airfow Airfow 280mm Dimension A Overa Width 216mm Optiona Attenuator Dimension D The attenuator wi increase the ength of the fan coi unit as foows: Attenuator Length Dim D (mm) Spigotted Outet View Fitered Inet View

11 Specification Casing Manufactured from 1.2mm thick foded gavanised mid stee sheet, with sotted hoes for easy instaation. Units incude a discharge air penum incorporating circuar de-mountabe discharge spigots and banking pates to faciitate rapid adaption to site conditions. Motor The fans are driven by a Brushess DC. motor with contros to provide infinitey variabe fan speed/air voume operation, with the additiona faciity for pressure independent operation. Fans Singe driven centrifuga fan assembies. Gavanised mid stee scros with staticay and dynamicay baanced impeer's, resiienty mounted within a verticay mounted 1.2mm foded gavanised mid stee fan deck. Heating and Cooing Cois Manufactured from copper tubes with mechanicay bonded auminium fins. The coi circuitry is arranged so as to faciitate air venting and draining with two pain ends for pipe-work connection. The coi is supported at either side of the casing. Eectric Heating Eements Manufactured from Stainess Stee tubes with 80/20 Nicke Chrome resistance wire and Magnesium Oxide insuation and are mounted on gavanised mid stee pates. Heaters are tested to BS7671. Heating cois are provided with a manuay re-settabe high temperature cut-out and an automatic therma cut-out, which is set to a ower temperature than the manua high temperature cut-out. Fiter Washabe/disposabe woven, continuous fiament fiter media to EU2/G2, contained within a rectanguar gavanised mid stee ange frame and compete with a stee wire mesh support pane. Fiter can be withdrawn from the rear of the of casing. Therma and Acoustic Treatment Two types of foam are used to achieve a high standard of acoustic and therma performance. Both foam types are cass O rated and seected to achieve a superior performing product. Condensate Tray Manufactured from foded and epoxy powder coated gavanised mid stee. The tray is mounted beow the coi and extends outside the casing beow the cooing and heating pipe work connections. It is compete with an externay appied cosed ceuar therma insuation materia. A secondary stee ining for added protection can be added as an optiona extra. Attenuators Two engths, 185mm and 400mm of attenuators are avaiabe to reduce noise eves and increase the air voume range of each size. Manufactured from 1.2mm foded gavanised mid stee and ined with 25mm cass O acoustic foam. Contros A fan coi unit contros are factory fitted and wired, and contained within a purpose made contro box mounted on the side of the fan coi unit. Each unit is suppied with on/off switch and 230 Vac./24Vac. transformer. Anaogue and digita contro options are avaiabe. 11

12 Fan Coi Units - Seection Guideines There are many things that effect the seection of a Fan Coi Unit (FCU) to meet with a project specification. These incude, but are not imited to, thickness of the materias used, fire rating of any foam incuded and efficiency of the motor/fan assemby. Once the mode type has been seected it is then that the task of seecting the size of FCU required. The size of the FCU is driven by the therma output and acoustic requirements of the seection. Seection Process Acoustic Banding of Each Size. The acoustic specification of the project shoud indicate maximum sound power eves for both the discharge and case radiated noise from the FCU. Using these vaues the maximum air voume for each size can then be estabished. Exampe Limiting Sound Power Leves (db) Case and Inet Radiated Frequency (Hz) k 2k 4k 8k Casing Radiated Discharge Therma Banding of Each Size Once the imits on the air voumes have been estabished to meet with the acoustic requirements of the project, it is then necessary to estabish the maximum therma output that can be achieved at this air voume. Within the specification the temperature for the suppy and return water wi be specified for the cooing and, if required, the heating. Using the maximum air voumes estabished to meet the acoustic specification and the suppy/return water temperatures, the maximum therma output can be given for each size of unit. A significant factor in the therma capacity avaiabe is the temperature of the air entering the FCU. This may be as high as 25 C but in every case this woud need checking as the primary air voume and temperature wi give a mixed condition that needs to be cacuated for every seection. For these seections a check shoud aso be made on the temperature of the air eaving the FCU to ensure it is not ower than required in the specification and that the hydrauic pressure osses through the coi are not too high. By ooking at just the acoustic specification and the water temperatures we can put a unit size to each seection. 12

13 Fan Coi Units - Seection Guideines Fan Coi Unit Suppy Air Voumes The next step in the process is to ook at the air voume requirement to satisfy the therma capacities schedued for each individua FCU. Quite often the air voumes have been cacuated based on the specification. In a ot of cases these air voumes wi be changed so that the FCU size seected wi deiver the therma capacities required. Each size of FCU wi cover a band of air voumes/therma capacities. Within each of these bands we have a fixed size FCU with a fixed ength of coi. The water fow is governed and dictated by the therma capacity requirement of the individua unit. The ony variabe that can be used to fine tune the output of the FCU is the air voume. It is for this reason that for each individua seection the air off temperature of the FCU wi be unique. Exampe FCU Performance Specification Exampe Limiting Sound Power Leves (db) Case and Inet Radiated Frequency (Hz) k 2k 4k 8k Casing Radiated Discharge Finished Space Noise Rating Situation NR Vaue Open Pan 38 Ceuar Office 35 Therma Performance Cooing Water Suppy/Return Temperatures 7 C and 14 C Heating Water Suppy/Return Temperatures 60 C and 45 C Ceiing Void Temperature 24 C Primary Air Temperature 14 C Air into FCU (Incuding Primary Air Mx) 22.5 C Minimum Air Off Temperature 14 C Coi Maximum Hydrauic Pressure Loss 16kPa 13

14 Other products from Advanced Air Air Distribution Equipment Gries and diffusers incuding ouvre face diffusers Linear sot diffusers Linear bar gries Eggcrate gries and door transfer gries A variety of finishes, powder coated to RAL9010 as standard, with other coours avaiabe Foor swir diffusers which suppy a ow veocity, heica discharge air pattern Twister ceiing swir diffuser Externa weather ouvers suitabe for most wa configurations VAV Termina Units Singe duct and dua duct units for different types of variabe air voume systems Fan Powered VAV units that use advance Brushess DC motors to give ower energy consumption and simper commissioning Air Contro Products Low eakage fire smoke dampers, tested to BS ISO Smoke and high temperature smoke dampers, which can be used up to 300 C for 120 minutes Curtain fire dampers provide a wide range of modes suitabe for most appications Contro dampers from vaue soutions to a ow eakage, ow pressure drop, airfoi bade type Contro Panes Fire smoke damper contro panes are avaiabe to provide soutions to suit a requirements Bespoke units, which can be manufactured to suit specific customer requirements For more information on these products, pease contact Advanced Air Saes Burre Way, Thetford, Norfok, IP24 3QU, Engand. Saes Te: +44 (0) Fax: +44 (0) emai: saes@advancedair.co.uk Customer Services Te: +44 (0) Fax: +44 (0) website: Committed to reducing YOUR carbon footprint