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1. CBC CHILLED BEAM CASSETTE Int Pat App WO 2005 015090 gt 9 c S jud o c Q c 97408008 02 Index Contents Page Part numbers 2 Chilled beams description and benefits 3 Standard equipment options and constructional details 4 Cooling and heating capacities 5 Air distribution sound levels and weights 6 7 Pressure drops and dimensions 8 Application guidelines 9 Installation general details mounting blanking caps chassis and fascia removal fitting 10 11 valve tray Condensate drain 12 Wiring diagram and check list 13 Component identification 14 Part Numbers STANDARD COMPONENTS PART NUMBER DESCRIPTION 97400001 Chilled beam inc gravity drain connector 97400002 Fascia metal Plastic fascia 97400821 LPHW coil Medium Temperature 50 40 C nominal 9740081 1 Electrics box req d if lift pump light or valve is fitted 97400812 Lift pump 0 5m lift Liftpump O 5mlif 97400815 Metal fascia with integral light fitting 97400820 Metal fascia with integral light fitting amp battery backup 450mm x 17 Flexible Hose Kit Any combination of these items requires the electrics box part number 9740081 1 to be fitted 2 14 97408008 02 The Quartz CBC Chilled Beam Cassette Developed in conjunction with the Building Research Establishment at Garston the Quartz CBC Chilled Beam
2. Cassette is a novel product that combines the many benefits offered by active chilled beam technology with the cost and space saving advantages of cassette technology Active Chilled Beams Once the concept of cooling by chilled beam had been proven and accepted using passive chilled beams development focused on increasing the beam capacity By introducing the required fresh air through nozzles adjacent to the cooling coil room air could be induced through the coil This induced flow substantially increased the beam s capacity Such devices became known as Active Chilled Beams Active chilled beams provide many benefits to the end user over traditional methods of cooling and heating Key benefits are 1 When cooling the use of relatively high water temperatures results in a high energy efficiency rating EER for the chiller supplying the circuit as well as providing substantial opportunities for free cooling in Northern European climates Analysis of the whole life cost of a chilled beam system shows it to be only 2 8 the cost of an equivalent fancoil system and 1 2 the cost of a VAV system Due to the fact that there are no moving parts maintenance and service requirements are substantially reduced Chilled beams are virtually silent in operation Chilled beams provide a better air distribution in the occupied space with less draughts E Specific Benefits of CBC Product In addition to the general benefits described above the CBC c
3. assette offers further features 1 The CBC is one of the few active chilled beams with the facility for condensate collection and removal This enables water temperatures and hence cooling effect to be maintained when the room conditions are such that condensate would be generated Other chilled beams must stay dry and do so by increasing the water temperature with a resultant drop in cooling duty 2 The unique construction of the CBC enables easy and complete removal of the chassis by one person from within the occupied space without disturbing the ceiling grid Removal exposes both sides of the cooling coil and the condensate tray for disinfection a process that is essential in the health care sector 3 By utilising standard suspended ceilings for mounting the CBC can easily be moved within the grid to accommodate changes of use of office space Description of Operation PLENUM CHAMBER FRESH AIR SUPPLY gt PRIMARY AIR INDUCED AIR SECONDARY AIR COOLEDAIR 4 COOLED AIR WARM ROOM AIR The Quartz Chilled Beam Cassette operates on the induction principle The building fresh air supply is treated filtered then heated or cooled in an external air handling unit This treated fresh air is introduced to the room via the chilled beam cassette being discharged within the unit through specially designed nozzles located around the periphery between the coil and the chassis The flow of air from these
4. be combined in the ceiling layout There is also a version with battery back up that can be used in areas requiring emergency lighting A blanking cap kit The caps are fitted over the nozzles to reduce or eliminate airflow from one side of the unit A valve drain tray kit This tray screws onto the pipe panel and sits below the control valves Any condensate that forms on the valve body can thus be removed A low cost plastic fascia with discharge air deflectors fixed at 35 for optimum performance In addition a filter for this fascia is also available Two port 15mm control valves for chilled water and LPHW circuits The valves are fitted with 240V on off actuators as standard Air damper kits for 2100 ducting The standard kit has a manually adjustable damper a Flexible hose kit that consists of two 450mm x flexible hoses with Speedfix connectors as standard Construction Top Panel The press formed top panel to which all the main components are attached is manufactured from galvanised mild steel sheet Fresh Air Plenum Moulded in medium density polyethylene It has flame retardancy properties that comply with the requirements of Class O Heat Exchange Coils Manufactured from copper tubes and collar spaced aluminium fins By expansion of the copper tube the fins are mechanically bonded to the tubes thereby ensuring maximum contact and optimum heat transfer Main Chassis Moulding in medium density polyur
5. e airflow from one side of the unit Mounting M10 M12 580 min 450 min 11 14 97408008 02 Fascia And Chassis optional removal and refitting Valve Tray option when a valve is fitted VALVE TRAY O RING CONNECTOR HOSE CLAMP SCREWS HOSE RED CAP IF PUMP FITTED COPPER PIPE HOSE CLAMP GRAVITY DRAIN 12 14 97408008 02 Condensate Drain If fitted GRAVITY DRAIN 5m 12m y a_i z 7 7 A WLLL LLL ALL Remove drain plug and fit drain adapter 6 mm 16 0 5m LIFT PUMP 150mm 1500mm TESTING GRAVITY DRAIN 13 14 97408008 02 Wiring Diagram Electrics Box amp Lift Pump if fitted oL 26001 F3 15A 250V Js 20x5mm d REMOVE YELLOW WIRE IF A V1 REMOTE THERMOSTAT IS TO BE USED BL N LIFT PUMP PCB F315mA gk 1 250V 20 5 Check List heced 1 istre unit square and tevel win the ceing O O O O o 2 isthe pipework correctly supported througnout is tergin 3 Are the chilled water pipes insulated right uptotheunit 4 all pipework joints been carefully checked tor leas 5 is the condensate drain correctly sized connected supported and insulated 6 Has the effectiveness of condensate removal system been tested and there are n
6. ethane foam that is flame retardant to UL94 VO The material is a poor conductor of heat thereby eliminating the requirement for additional insulation The lightweight nature of the construction reduces the labour requirement for installation and for cleaning 4 14 Top panel Fresh air plenum Coil Metal fascia 97408008 02 Metal Fascia Standard The fascia is made from an assembly of extruded aluminium profiles whilst the grille is produced from perforated galvanised mild steel sheet All fascia components are painted gloss white to RAL 9010 Plastic fascia Performance Data Supply _ Differential eee Air Volume Flow 1 5 15 1515 25 1 5 30 1 5 Flow 0 Flow Flow C C 5 5 5 0 030 0 036 4 24 5745 0 023 0 031 ES 0 038 M27 0 045 2 24 492 0 037 0 050 E 0 062 987 0 074 0 056 0 093 Total Cooling Capacity Watts Room Chilled Water Total Cooling Capacity Q W 662 0 057 _875 10075 1086 0 093 1292 0 111 12 3 24 624 0 035 824 10 046 1014 0 057 1180 0 066 Denotes duty points where condensate may form on the coil Heating Capacity Qi Watts LPHW Heating Capacity Qi W Supply Return Primary Air Vol Air Volume Flow l s 20 20l s m Flow EE uc C 5 20 404 0010 512 0 012 608 0 015 696 0017 22 22 Air volume flow Primary Fre
7. g a DX coil with an inverter controlled condensing unit whilst the chiller is dedicated to supplying the chilled beam circuit with high temperature 14 C water If 14 C water is used a substantial opportunity to generate this by free cooling exists in Northern European climates Either a dry cooler can be incorporated in the water circuit or a dedicated free cooling chiller utilised for the chilled beam circuit The latter option will have specialised controls built in to the chiller to maximise the free cooling thereby obviating the requirement for a specialist bespoke control package 10 14 97408008 02 Installation General CBC units must only be installed and maintained by qualified persons in accordance with all national and local regulations relating to plumbing and electrical installation The data plate only gives information for the CBC unit TEV Ltd recommend that personnel working on this equipment be skilled and fully conversant with the appropriate air conditioning and electrical practices and have sound knowledge of current industrial safe working practices and Declaration of Conformity Fascia assembly inc 4 x screw washer Template Hanging bracket Washer Screw Drain Connector inc O ring NOTE The unit can be installed with the chassis in position or removed prior to installation for easier access Blanking Caps These can be fitted to any of the 4 sides of the plenum chamber to reduce or eliminat
8. liminate the airflow from one side of the unit If the unit is to be installed close to a wall typically nearer than 1 5m the discharge from the side nearest to the wall should be blanked off Note that the noise data provided is for a single unit and that most applications will require multiple units in the zone A correction for the effect of adjacent units must be made Controls amp Valves The output of the CBC may be controlled in two ways The main method of control is by variation of the water flow to the cooling coil however it is also possible to adjust the capacity by variation of the primary air supply Where an area has continuous occupation during working hours the CBC can be controlled by variation of the water flow This can be either simple on off valves or more sophisticated modulation of the flow with respect to distance from set point Each CBC can be fitted with a valve and controlled individually However in larger zones that have multiple CBC units a single valve can control a group of units This is the most cost effective means of performing group control although it can also be achieved using relay boxes switching multiple individual valves In areas with intermittent occupancy meeting rooms for instance control of both water and primary air will be required When fully occupied the control method will be by variation of the water flow as described above When the occupancy level drops or disappears the reduc
9. nozzles causes a reduction in pressure thereby inducing a flow of air from the unit centre across the heat exchange coil s This air is replaced by warm air from the room that rises by convection and enters the cassette via the central grille The main coil is supplied with cooling water and the optional LPHW coil if fitted with heating water The induced air is thus conditioned and mixed with the fresh air supply before discharging to the space via the four way blow fascia 3 14 97408008 02 Standard Components The standard Quartz Chilled Beam Cassette consists of two components a chassis part number 97400001 and a metal fascia part number 97400002 The condensate gravity drain connector is supplied loose as standard with each unit Options A filter which when fitted into the fascia will remove dust from the return air prior to passing through the coil Two versions of LPHW coil are available that have been designed to minimise stratification when using the CBC for heating The coil type selected is dependant upon the water temperature available for heating supply either 50 C or 80 C An electrics box that must be fitted if the lift pump light fitting or valve options are being used A lift pump that can achieve a lift of 0 5m The pump controls provide a high level alarm as standard A high efficiency light fitting incorporated into the metal fascia Using this option enables the lighting and cooling grids to
10. oleaks 7 isthe aircistibuton 78 14 14 97408008 02 CBC Component Identification 2 3 A 5 3 6 c T m c 9 10 uU 12 m m 17 14 m 15 16 m 18 Hanging brackets 2 0 11 Terminal block option 13 15 Valve tray option Cooling coil heat exchanger Gravity drain adaptor Lift pump option Hose supplied with valve tray Chassiis LPHW coil option Chassis 9 Coil bracket 4 off Metal Fascia Blanking caps option 2 port valve option Pipe panel EE 3 4 5 Pipe panel 6 8 TEV LTD ARMYTAGE ROAD BRIGHOUSE WEST YORKSHIRE HD6 1QF TEL 44 0 1484 405630 FAX 44 0 1484 405620 EMAIL sales quartz co uk WEB www quartz co uk 15 14 97408008 02
11. sh Air 15 54 20 72 25 90 Secondary Room Total Supply Air 5 14 97408008 02 Air Temperature Distribution Conditions Room air 24 C Primary air 14 C Chilled water 14 C Flow 16 C return Airflow volume flow 15 1 6 97408008 02 1 900mm 1300mm 150mm Airflow volume flow 25 l s Sound Levels The maximum sound pressure level measured 1m down and 1m away from the centre of the unit in a room of 32m volume and with a reverberation time of 0 5 seconds is 32dB A NR27 with a primary air volume of 30l s At lower primary air volumes the sound Pressure level is in the order of 280B A NR23 25 For further details contact TEV Applications Department Weights Packed Weight kg Unpacked Weight kg Coil Water Volume litres Operating Weight kg 1 7 14 97408008 02 Pressure Drops Chilled water pressure drop 100 90 LPHW pressure drop EL 80 70 60 50 40 30 Unit pressure drop kPa 20 Unit pressure drop kPa wo 10 0 o o o o o o o o 4 gt c Chilled water flow rate 1 6 o o o o N o o o 4 AR supply temperature supply temperature 170 160 Primary air duc
12. t pressure 150 140 130 120 110 100 80 70 Duct pressure Pa 60 50 40 30 20 18 19 20 21 22 23 24 2 Primary air volume 1 5 D gt B LPHW flow vd 1 5 j j Low temp LPHW of 50 C High temp LPHW of 80 C 26 27 28 29 30 Dimensions Dimensions in mm 8 14 97408008 02 600 LPHWIN _LPHW OUT LIFT PUMP OUTLET IF FITTED 98mm FRESH AIR SPIGOT FOR PRIMARY AIR SUPPLY 298 ELECTRICS BOX IF FITTED GRAVITY DRAIN CONDENSATE OUTLET Min 580x580 Application Guidelines Selection of Units Active chilled beams may be selected and applied in a similar manner to fancoils It is important to ensure that at any given condition sufficient units are chosen to meet the cooling load With fresh air supply rates of 12 1 5 per person and one person per 5 the CBC will cater for loadings of 70 90 W m Typically a single CBC will be required for every 10m in this arrangement Lower loadings will obviously require fewer units and in such instances provision for extra fresh air supply may have to be made Higher loadings that require more than one unit per 10 can be catered for but care must be taken that airflows from adjacent units do not impinge on each other and dump refer to airflow diagrams Blanking caps are available to reduce or e
13. tion in load will cause the valve to close The primary air however being supplied at a low temperature will continue to cool the room The controller must recognise this and close off the primary air supply to prevent over cooling the room Sophisticated systems will further detect the increase in duct static pressure and by means of speed controllers on the AHU motor reduce the overall fresh air supply Energy Efficiency amp Free Cooling 9 14 97408008 02 Active chilled beams are an exceptionally energy efficient method of providing comfort cooling to an occupied space There are several reasons for this The CBC unit operates using the energy of the fresh air supply that must be provided to the building No other energy input is required The energy used by the fan in a traditional fancoil is thus saved and although this appears to be small on large projects with long hours of operation it becomes substantial It must be borne in mind that the energy use over the entire life of the unit must be considered and this is why whole life costing analysis of chilled beam projects is so important The higher water temperatures that are used initially to prevent the coil generating condensate provide the opportunity to operate the chiller at very high EER s This benefit can be lost if the design of the system is compromised by using the chiller to temper the fresh air with 6 12 C water Ideally tempering of the fresh air would be performed usin

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