Finvector Perimeter Heating
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- Brittany Daniel
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1 Finvector Perimeter Heating Products that perform... By people who care
2 Identification Contents Page Identification 2 Introduction 2 Authority 2 Description 3-6 Range 2 Casings 3 Elements 3 Introduction This booklet provides comprehensive information about Finvector perimeter heating, with guidance on selection, application, use and supply. Dunham-Bush Finvector consists of steel casings which house finned tube elements with linear aluminium grilles. Finvector provides natural convection heating around the room perimeter and produces a warm air curtain, which off-sets down draughts and heat losses, to ensure comfortable conditions. It is suitable for operation with a pumped hot water or low pressure steam system. Authority Dunham-Bush Ltd., operates a quality control system and is a registered company of assessed capability ISO 9001:2000 Performance 7-8 Casing outputs linear grille 7 Composition/Manufacture 9-11 Heat output factor graphs 11 Maximum touch temperatures 6 Applications 12 General considerations 12 Determining element requirements Provision for expansion 16 Casing dimensions Engineering specification Construction 22 Handling 22 Storage 22 Preparation 22 Installation details 22 Maintenance 22 Prices, conditions of sale 22 Supply 22 Ordering 22 Hydrocourse Trench Heating 23
3 Description Range The range of Finvector casings with limitations of single and double row elements with and without dampers is shown on pages 4 to 5. The full range of casings and suitable element types is shown in the performance section of the booklet. Casings Finvector casing, 60mm and 90mm wide is offered in three styles Front outlet, Sloping outlet and Top outlet with extruded aluminium alloy shadowline linear grilles. These variations are indicated as follows: Casing Styles Style FA 6 60mm wide casing 9 90mm wide casing T Top outlet S Sloping outlet F Front outlet A Extruded aluminium alloy shadowline grille I Inlet grille 300, 450, 525 etc. casing height mm The symbols combine to identify the casing type. Examples: Finvector casing type 6TA300 60mm wide, top outlet aluminium grille, 300mm high casing. Finvector casing type 6TA365 60mm wide, top outlet aluminium grille, 365mm high casing. Elements Finvector heating elements to suit 60mm and 90mm wide casings are offered manufactured from steel tube with steel fins or copper tube with aluminium fins. The variations are identified as follows: 22 & 28 tube nominal diameter in millimetres S Steel tube, C Copper tube 6 Suitable for 60mm wide casing 9 Suitable for 90mm wide casing These symbols combine to identify the element type. Example: Finvector element 22S6S 22mm outside diameter, steel tube suitable for 60mm wide casing, steel fins. Note: 1. Steel tube always combines with steel fins 2. Copper tube always combines with aluminium fins 3. All tube options have plain ends only Style SA Style TA
4 Range List - Aluminium Linear outlet grille Style Casing width mm Element and damper arrangement Casing height mm Single row 6TA 60 Single row and damper Double row Double row and damper Single row 9TA 90 Single row and damper Double row Double row and damper Single row 6SA 60 Single row and damper Double row Double row and damper Single row 9SA 90 Single row and damper Double row Double row and damper Single row 6FA 60 Single row and damper Double row Double row and damper Single row 9FA 90 Single row and damper Double row Double row and damper See Performance section of this booklet for combined list of casing and element types.
5 Range List - Aluminium Linear inlet and outlet grilles Style Casing width mm Element and damper arrangement Casing height mm Single row 6TAI 60 Single row and damper Double row Double row and damper Single row 9TAI 90 Single row and damper Double row Double row and damper Single row 6SAI 60 Single row and damper Double row Double row and damper Single row 9SAI 90 Single row and damper Double row Double row and damper Single row 6FAI 60 Single row and damper Double row Double row and damper Single row 9FAI 90 Single row and damper Double row Double row and damper See Performance section of this booklet for combined list of casing and element types.
6 Composition/Manufacture Casing Type 9FA460
7 Performance Casing outputs Linear Grille Conditions L.T.H.W 75 C mean, 1 m/s Water velocity, entering air 18 C ( T 57K) Table 1 Heat outputs, watts per meter, from finned element installed in 60mm wide casing having extruded aluminium outlet grille. Table 2 Heat outputs, watts per meter, from finned element installed in 90mm wide casing having extruded aluminium outlet grille. The performance data listed in the tables and graphs has been derived from tests in accordance with BS 3528:1977. Please refer to the applications section, pages 12 to 14 for examples of using the data. Table 1 Casing Type Single Row Double Row 22C6A 22S6S 22C6A 22S6S 6TA TA TA TA TA TA TA SA SA SA SA SA SA SA FA FA FA FA FA FA Table 2 Casing Type Single Row Double Row 22S9S 22C9A 28S9S 28C9A 22S9S 22C9A 28S9S 28C9A 9TA TA TA TA TA TA TA SA SA SA SA SA SA FA FA FA FA FA
8 Casing outputs Linear Grille with inlet Grille Conditions L.T.H.W 75 C mean, 1 m/s Water velocity, entering air 18 C ( T 57K) Table 3 Heat outputs, watts per meter, from finned element installed in 60mm wide casing having extruded aluminium inlet and outlet grille. Table 4 Heat outputs, watts per meter, from finned element installed in 90mm wide casing having extruded aluminium inlet and outlet grille. The performance data listed in the tables and graphs has been derived from tests in accordance with BS 3528:1977. Please refer to the applications section, pages 12 to 14 for examples of using the data. Table 3 Casing Type Single Row Double Row 22C6A 22S6S 22C6A 22S6S 6TAI TAI TAI TAI TAI TAI TAI SAI SAI SAI SAI SAI SAI SAI FAI FAI FAI FAI FAI FAI Table 4 Casing Type Single Row Double Row 22S9S 22C9A 28S9S 28C9A 22S9S 22C9A 28S9S 28C9A 9TAI TAI TAI TAI TAI TAI TAI SAI SAI SAI SAI SAI SAI FAI FAI FAI FAI FAI
9 Graph 1 Heat output Factor basis at t 57k Graph 2 Water mass flow rate velocity Graph 3 Water velocity heat output factor
10 Graph 4 Pressure loss Graph 5 Damper effect Table 5 Casing Height in mm Heat outputs, watts per metre of finned element only, without casing, (installed 100mm, from floor to underside of fins). Conditions: L.T.H.W. 75 C mean, 1m/s water velocity entering air 18 C ( t 57K). Type 22S6S 22C6A 22S9S 22C9A 28S9S 28C9A W/m Table 6 Heat outputs watts per metre from plain tube installed in Finvector casing. Conditions: L.T.H.W. 75 C mean, 1 m/s water velocity, entering air 18 ( t 57K). Casing Height mm 60mm deep casing 90mm deep casing 22S 22C 22S 22C 28S 28C 130 to to to to to
11 Graph 6 Maximum touch temperatures Maximum Touch Temperature Minus Ambient Temperature (K) Row <300mm High 2-2 Row 315mm To 460mm High 3-2 Row 525mm High 4-2 Row 600mm High & 1 Row 260mm High 5-1 Row 300mm To 350mm High 6-1 Row 375mm To 450mm High 7-1 Row 525mm High 8-1 Row 600mm High Water Temperature Minus Ambient Temperature (K) 100 NOTES A) The maximum touch temperature is at the outlet grille. Casing temperatures will be lower. B) To obtain the maximum touch temperature, deduct the ambient air temperature from the water temperature and mark the horizontal axis at this value. Project the above value up the graph until it crosses the diagonal line of the style of casing proposed. From this crossing point project a line horizontally and read the value where this line crosses the vertical axis. The Maximum touch temperature is the sum of the value on the vertical axis and the ambient temperature. Table 7 Typical approximate casing masses, kg per metre. Casing height mm Casing style 6TA 6SA 6FA 9TA 9SA 9FA Add for damper Add for backplate Table 8 Approximate masses of single row Finvector element. Element type 22C6A 22S6S 22C9A 22S9S 28C9A 28S9S Mass, kg/m
12 Application Finvector has been applied successfully to heat many types of buildings such as office blocks, schools, colleges, universities, libraries and hospitals. It is usually located around the perimeter of a building along the external walls, where the greatest heat loss often occurs, but it is also suitable for installation on any plain, vertical surface. Finvector is particularly suitable for installation beneath large glass areas featured in many modern buildings, since it offsets downdraughts and ensures comfortable conditions. Finvector is ideally suited for heating large spaces, subsequently to be divided into smaller units. The design and construction of the casing is such that the modular features of the building can be matched, permitting partitioning to be re-sited at will, without the necessity to make major alterations to the heating equipment. Alternatively, where the application is non-modular, the design permits flexibility and adjustment to the overall length of casing run is possible, due to the overlap of the frontplate on the make-up plates, end caps and corner pieces. The overlap and the feature of frontplates in relief can be used to emphasize the modular building construction when the tailor-made Finvector equipment is selected to follow the column and window mullion positions. General Considerations When considering the application of Finvector for a particular installation it is essential to ensure that sufficient depth and height are available to accommodate the type of casing selected. The casing must be positioned above the finished floor level to allow unrestricted entry of the inlet air. Low temperature pumped hot water, in the range 70 C to 80 C mean temperature, is by far the most popular heating medium for use with Finvector, but it may also be used with high temperature hot water or steam, but such a medium may produce unacceptably high casing temperatures. See graph 6. The equipment is also suitable for use with the low water temperatures available from heat reclaim air conditioning schemes, but such applications necessarily require a larger quantity of element for a given heat loss than would be required if standard low temperature hot water were used. Although the equipment is not supplied with air vents, they must be provided on all hot water installations. Elements must be correctly graded and an air vent fitted at the highest point on each element run. When steam is chosen as the heating medium, the Finvector element must be correctly graded approximately 13mm in each 3 metre run, which usually requires long runs to be divided into several shorter sections each with its own strainer, steam trap, valves etc. The optional quadrant damper, available with most types of Finvector, will allow occupants of separate enclosed areas to reduce the heat output locally. The choice of system control depends very much on the size of the installation, economic factors and regulations. One of the most popular arrangements on larger installations is the control of the space temperature in each zone, using a weather compensated supply. The first sizing method is to aim at a minimum water velocity, ideally 1 metre per second. This water velocity ensures rapid air clearance and the most efficient heat transfer. The second sizing method is to decide on the water temperature drop across each run or section of element as connected across the mains. If this method is used, it is important to ensure that the water velocity does not fall below 0.1 metres per second. Determining element requirements METHOD 1 This method is utilised when the total heat output requirement, water velocity, mean water temperature and ambient air temperature are known. Step 1 From the overall length available to accommodate the casing, deduct an amount sufficient to allow for valves, expansion joints and connecting to mains. The result will be the length available for Finvector element. Step 2 Divide the result from Step 1 into standard overall element lengths, bearing in mind selecting longer elements will result in fewer joints and less plain tube. Step 3 After deciding upon the overall element lengths required, total up the finned lengths and divide this into the total heat requirement for the run. The resultant will be the necessary heat output per liner length of finned element to meet the heat requirements of the run. Step 4 Having previously decided upon the casing type, refer to the Heat Output Table and select an element arrangement to suit the heat output per linear length found in Step 3. Once this has been established, the pressure loss of the particular run can be found by reference to Graph 4. Example: A run of Type 9SA525 Finvector is required to provide a total heat output of 4kW. The heating medium available is low temperature hot water 75 mean, water velocity 1 metre per second, entering air temperature 18 C. ( t = 57K). Overall run length available 7.2 metres. Please refer to Performance section, pages 7 to 11 for tables and graphs referred to in this example. 1. From the overall run length; deduct an allowance for valves and connecting up to the mains at each end, say 0.6 metres total. (Note, expansion joints not required on this run). Length available for element; 7.2m - 0.6m = 6.6m. 12
13 2. Select elements using the overall lengths. (2 x 2.3m) + (1 x 2m) = 6.6m Total overall length. Total finned length is total overall length less 0.15m per element. Total finned length, 6.6m (3 x 0.15m) = 6.15m 3. Divide total heat output required from the run by the total finned length available 4000W = 650W/m 6.15m From Table 2, 9SA525 casing with 22S9S single row element gives a heat output of 655 W/m of finned element under the stated conditions. From Graph 4, the pressure loss at 1 m/s is 580 Pa/m for 22mm steel tube. Pressure loss of 6.6m length of element tube, 6.6m x 580 Pa/m = 3.8 kpa. If the operating conditions in the above example are changed to 65 C mean water temperature, 0.5m/s water velocity, entering air temperature 15 C, it would be necessary to apply correction factors as follows: From Graph 1, factor for 65 C mean water temperature, entering air temperature 15 C ( T = 50K) F1 = From Graph 3, factor for 0.5m/s water velocity F2 = Combined factor F1 x F2 = 0.84 x = This Factor is now divided into the required heat output so that direct reference can be made to the performance table. 4000W = 4900W Divide this heat requirement by the heat output of 9SA525 casing with 22S9S single row element to find the finned length required. 4900W = 7.48m 655W/m But the maximum finned length for this run cannot exceed 6.15m, which will give a maximum heat output of 6.15m x 655W/m x = 3295W. The suggested alternative is to use 22C9A single row element which gives a heat output of 832W/m, thus the finned length required will be: 4900W = 5.79m 832W/m Elements required (1 x 2.3m) + (2 x 2m) = 6.3m total overall length. Total finned length 6.3m (3 x 0.15) = 5.85m. From Graph 4, pressure loss per metre 150 Pa. Pressure loss of 6.3m nominal element length: 6.3m x 150 Pa/m = 945 Pa. Determining element requirements METHOD 2 This method is used when the total heat requirement, water temperature drop across the run, mean water temperature and ambient air temperature are known. It is applicable to looped or return bend circuits and 1-row heated circuits. When 2-row headed circuits are utilised, the calculated water mass flow rate must be halved as the top and bottom row of elements should each carry half the total water quantity. Please refer to Performance section, pages 7 to 11 for tables and graphs referred to in this example. Step1 Knowing the heat output requirement, divide this figure by the temperature drop across the run and the specific heat capacity (Cp) of water, to determine the water mass flow rate. m(kg/s) Heat output kw Drop ºC x C p Cp is specific heat capacity of water taken as 4.2 kj/kg K Step 2 Refer to Graph 2 and proceed from the calculated water mass flow rate, determined in Step 1, across horizontally to the correct sloping line for the element tube size and material being used. From this line drop vertically to obtain the water velocity v (m/s). Step 3 Refer to Graph 3 and using the water velocity from Step 2, proceed vertically to the curved line and then horizontally to obtain the heat output factor F2. Step 4 Divide the total heat output requirement for the run by the heat output factor. Step 5 Divide the resultant from Step 4 by the heat output of the element and casing selected from the tables to obtain the total finned length of element required. Note: If operating conditions are other than stated in the tables, the appropriate factor F1 must be applied. Step 6 From the overall length available to accommodate the casing, deduct a sufficient amount to allow for valves, expansion joins and connecting to mains. The result will be the length available for Finvector element. Step 7 Select standard elements to meet total finned length determined in Step 5 and ensure total overall element length does not exceed that determined in Step 6. Example: A run of 9TA600 Finvector is required to fit into a space 17 metres overall length and provide a total heat output of 16.8kW. Single or double row 35C9A element is to be arranged in a loop with same end connections. 13
14 With low temperature hot water at 80 C & 70 C, flow & return and entering air temperature at 18 C. 1. Water flow rate: 16.8kW (80-70) x 4.2kJ/kg K 2. Refer to Graph 2 and from 0.4 kg/s proceed horizontally to the line marked 35C. Drop vertically to obtain water velocity = 0.5m/s. 3. Refer to Graph 3 and from 0.5m/s proceed vertically to the curved line and then horizontally to obtain heat output factor F2 = Divide heat output requirement for the run by the heat output factor. 16.8kW = 17.25kW Divide heat output from Step 4 by heat output of 9TA600 casing with single or double row 35C9A element, found from Table kW = 21.58m 0.799kW/m Single row finned element Or 16.8kW = 15.31m 1.097kW/m Double row finned element = 0.4kg/s 6. As the single row element length exceeds the casing run length, double row will be necessary. Bearing in mind that longer elements will mean fewer joints, 6 elements per row are suggested as follows: 6 x 2.8m = 16.8m Overall elements per row. Finned length 16.8m (6 x 0.15m) = 15.9m which agrees with the requirements from Step 5. Provision for expansion, General considerations. When Finvector elements and tubing are connected up to form a continuous run, provision must be made for the expansion which results when the heating medium is applied to the system. It may be possible, in some circumstances, to arrange for a small amount of expansion to be taken up by allowing the pipework to swing. But it is usually necessary to provide expansion joints or bellows to absorb the expansion. Because of the limited space available within the Finvector casing it is not always possible to fit proprietary expansion bellows, and for this reason Dunham-Bush offer purposemade expansion joints and suitable pipe guides. Quantity of Expansion Joints and Suitability To decide on the quantity and suitability of Dunham-Bush expansion joints for a particular application, three main factors must be considered. 1. The total amount of movement or expansion of the elements and tubing in the run being considered. This will depend upon the difference between the installed and operating temperature and the coefficient of linear expansion of the tube material. 2. The system working and test pressures. The designer must ensure that the working pressure takes into account any static heads plus any additional system pressurisation applicable. 3. The operating temperature must not exceed 150 C. The expansion of any length of steel or copper tube Finvector elements can be obtained from Graphs 7 and 8. Example Select the quantity and check the suitability of Dunham- Bush expansion joints for a run of 9SA450 Finvector casing approximately 23 metres overall length, fitted with 22 metres of 28S9S single row element. The system is not pressurised but must be suitable for a static head of 30 metres and a pressure of 7 bar. Assume system is to be installed when the ambient air temperature is 5, Water flow temperature 80 C. Step 1 Check to ensure Dunham-Bush expansion joints are suitable for the working pressure, test pressure and operating temperatures refer to Table on page 15. Step 2 Temperature difference between water flow and ambient air, 80 C - 5 C = 75K, Length of element 22 metres. From Graph 8, page 16 total expansion is 19.3mm. Step 3 From Table 9, page 15, total compression movement per expansion joint is 16mm, cycle life 25mm, 4000 cycle life. Thus one or two expansion joints may be used for this particular run, see fig 1 and 2. Location of Expansion Joints and Pipe Guides Having decided on the quantity of expansion joints, the designer must now decide where they should be applied and, the positions of pipe guides and anchor points. Dunham-Bush expansion joints are guided internally but it is recommended that external pipe guides should be fitted each side of an expansion joint and sufficient intermediate pipe guides should be fitted along the run to ensure only axial movement. Elements and tubing should be anchored in accordance with recognised practice, securely fastened to the building structure. Only one expansion joint should be fitted between each pair of anchor points. 14
15 Table 9 Tube Size Total Compression Movement 4000 Cycle Life Cycle Life Max. Working Pressure Max. Test Pressure Anchor Thrust* At Maximum Cold Test Pressure mm mm mm bar gauge bar gauge Newton s NOTES: 1. Maximum operating temperature 150 c 2. *Safety factor not included. Figs 1 and 2 Expansion Joints and Expansion Pipe Guides Single Element Run Double Element Run 15
16 Graph 7 Linear expansion of copper tube element Graph 8 Linear expansion of steel tube element 16
17 Style TA & TAI 17
18 Style SA & SAI 18
19 Style FA & FAI 19
20 Engineering Specification The Finvector perimeter heating equipment shall be manufactured by Dunham-Bush Ltd. The types and quantities shall be as detailed on the drawings or schedule. The constructional features must comply with this specification. Casing components All standard component parts for each casing type, necessary to produce a complete installation, shall only be supplied if specified. Casing standard parts Anti-streak sealing strips Brackets Make-up plates Frontplates Frontplate centre supports Splice plates Inlet backs Shadowline grilles Grille joint pieces Fixings Note: Certain parts are not applicable to all casing types. Refer to parts description. Casing accessories End caps End plate/grille end cover plate Corners Dampers Backplates Insulation boxes Element standard parts Finned tubes Fin and tube support brackets Screws and washers Element accessories Plain tubes Expansion joints Pipe guide kits Element adaptors Anti-streak sealing strips Anti-streak sealing strips shall be supplied for all casing styles except FA and FAI, shall be manufactured from extruded aluminium, in lengths of 1800mm for cutting on site. All strips shall be complete with foam seal. Make-up plates Make-up plates shall be provided in lengths of 200mm. They shall be manufactured from 1.2mm mild steel and shall be suitable for attaching to brackets with screws and captive nuts provided. Brackets The following brackets shall be provided for each makeup plate. Styles TA or SA, two vertical and one horizontal. Styles TAI, SAI and FA, two vertical and two horizontal. Frontplates Frontplates shall be manufactured from 1.2mm mild steel. The sides and bottom shall be formed to provide additional rigidity. Frontplates shall be securely fixed by interlocking with the make-up plates at the top and by screws at the bottom. Frontplates shall be available as follows: Standard 250mm to 1800mm long in 50mm increments, with damper, 600mm to 1800mm long in 50mm increments. Frontplate centre supports Vertical brackets and plates shall be supplied to provide additional support at the bottom centre of each frontplate 1000mm to 1800mm long. Aluminium grille shall also be provided with a top bracket and plate for frontplates 1250mm to 1800mm long. Top/Bottom plates Style FA shall be supplied with top plates. Styles TAI and SAI shall be supplied with bottom plates. Style FAI shall be supplied with top and bottom plates. Top and bottom plates shall be manufactured from 1.2mm mild steel, in lengths of 100mm to 1800mm in 100mm increments. Splice plates Splice plates shall be provided to ensure correct alignment of top/bottom plates at butt joints. Shadowline grilles All grilles shall be manufactured from extruded aluminium alloy, in lengths of 1800mm for cutting on site and finished in Dunham-Bush shadowline. Grille joint pieces A grille joint piece should be provided to ensure proper alignment at the butt joint between adjacent sections of aluminium grille. Fixings All components shall be supplied with self tapping screws and captive nuts as necessary. Screws or other fixings for securing Finvector to the building structure shall be supplied by others. Finish All zinc coated steel components shall be self finished. Unless otherwise specified, the following mild steel components shall be finished epoxy/polyester powder coated semigloss, BS4800:1989 colour 10 A 03 flake grey 29% gloss: Frontplates, make-up plates, top/bottom plates, inlet backs, end caps, end plate/grille, end cover plates and corners. The following components shall be finished epoxy polyester power coating matt, BS4800:1989 colour 00 E 53 black 10% gloss: Extruded aluminium grilles (except face of bar, which shall be self finished), horizontal brackets, grille joint pieces, visible face of aluminium ant-streak sealing strips. Damper blades for aluminium grille style shall be black finish. All elements shall be self finished. End caps If specified, left and right hand end caps shall be supplied to terminate each run of Finvector. Each end cap shall consist of an end, front and necessary brackets. End caps shall be manufactured from 1.2mm mild steel, and end caps shall be 100mm long. Each end cap end shall be complete with knockouts for pipework entry. 20
21 End plates and grille end cover plates If supplied, left or right hand end plates shall be supplied to terminate each run of Finvector. End plates shall be supplied with brackets. End plates shall be manufactured from 1.2 mm mild steel, in lengths of 100mm. Aluminium grille styles shall be supplied with grille end cover plates. Corners If specified, 90, 135, 255 or 270 corners shall be provided. Corner fronts shall be manufactured from 1.2mm mild steel. All the necessary brackets shall be supplied for each corner. Style FA shall be supplied with a corner top. Style FAI shall be supplied with a corner top and bottom. Dampers If specified a damper shall be provided with frontplates 600mm to 1800mm long. Dampers shall have the operator assembled to frontplate, but damper blade supplied separate for site fitting. The red/blue damper operator shall permit smooth fingertip adjustment of a damper to any position between open and closed. Backplates If specified, 0.7mm zinc coated mild steel backplates shall be provided, in lengths of 100mm mm in 100mm increments. Element general The choice of elements shall be as detailed below. Each element shall be supplied with fins having formed collars to ensure correct fin spacing and maximum heat transfer between fins and tube. The fins shall be bonded to the tube by mechanical expansion. Each element shall be supplied with the necessary element support brackets, pipe support brackets, screws and washers. Steel tube/steel finned elements Elements type 22S6S shall consist of 22mm O.D. steel tube and 48mm x 60mm zinc coated steel fins. Element types 22S9S & 28S9S shall consist of 22mm & 28mm O.D. respectively, steel tube and 76mm x 76mm zinc coated steel fins. All fins shall have nominal thickness of 0.5mm. Element tube shall be thin wall to BS3059: part 1:1987. Outside diameters shall be listed below: Element type Minimum O.D. Maximum O.D. 22S6S & 22S9S mm mm 28S9S mm mm 35S9S mm mm All steel tube/steel finned elements shall be available with plain ends. Overall element lengths 600mm to 3000mm, in 100mm increments. Unless otherwise specified, finned length shall be the overall length less 150mm, giving 75mm tube ends. Copper tube/aluminium finned elements Element type 22C6A shall consist of 22mm O.D. copper tube and 48mm x 60mm x 0.6mm aluminium fins. Element types 22C9A & 28C9A shall consist of 22mm & 28mm O.D. respectively, copper tube and 76mm x 76mm aluminium fins having a thickness of 0.6mm. Element tube shall be light gauge copper to BS2861:1971, Part 2C106. Outside diameter shall be to BS EN 1057-R250 as listed below. Element type Minimum O.D Maximum O.D. 22C6A & 22C9A mm mm 28C9A mm mm 35C9A mm mm All copper tube/aluminium finned elements shall have plain ends, 22C6A and 22C9A elements shall be available in overall lengths of 600mm to 2000mm in 100mm increments. All other elements shall be available in overall lengths of 600mm to 3000mm in 100mm increments. Unless otherwise specified the finned length shall be 150mm less than the overall length, giving 75mm plain ends. Working Pressure/Temperature and Test Pressure elements The work pressure/temperature and test pressure shall be limited to those given for expansion joints and/or those permitted by fittings used to join elements. Elements only Maximum working pressure bar gauge, maximum working temperature C, maximum cold test pressure bar gauge. Expansion Joints When specified, expansion joints shall be supplied to suit the type of element. Expansion joints shall be manufactured from gilding metal and shall have plain copper ends to BS EN 1057-R250, suitable for compression or capillary fittings. Working Pressure/Temperature and Test Pressure expansion joints Maximum working pressure 6.9 bar gauge, Maximum working temperature - 150, Maximum cold test pressure bar gauge. Expansion Joint Guide Kits When specified, expansion joint pipe guide kits manufactured from 1.6mm zinc coated steel shall be provided for fitting each side of an expansion joint and at intervals along the element run to ensure only axial movement. Guide clips shall be slotted to allow element grading. Element Adaptors When specified, mild steel element adaptors shall be provided, to convert to BSP sizes for welding or screwing at run ends. Performance Finvector shall be capable of producing the heat outputs listed in the manufactures Products Catalogue, when installed in accordance with their recommendations. Heat outputs shall be derived from test in accordance with BS3528:1977. Anchors Anchors shall be provided by others where necessary. 21
22 Construction Handling Small orders are usually packed in easily handled bundles and can be off-loaded by hand. Larger orders are usually palletized and lifting equipment should be provided. Care should be taken to avoid damage. Storage Finvector components should be stored under dry, clean conditions. Any protective packing should not be removed until the components are required for installation, unless damage in transit is suspected. (Note: The buyer must examine the goods promptly upon arrival and is not entitled to make any claim against the Company in respect of damaged goods, unless at the time of delivery of the goods, the delivery note is indorsed by the buyer and countersigned by the carrier or shipping agent with a note detailing the damage). Preparation A sound vertical flat surface is necessary for the installation. If walls are rough or uneven, it will be necessary to pack out to ensure brackets and anti-streak sealing strip can be properly aligned and fixed. Plugs and screws or other suitable fixings must be provided by others. Layout Drawings Every large Finvector is supplied with Dunham-Bush layout drawings which show the location of all runs of Finvector and the positions of the main components. A material list details all of the equipment supplied and is tabulated so that all of the components for each run can be extracted from the material supplied. Installation Details for Aluminium Grille Styles A clearance of at least 50mm, for air inlet, must be allowed between the bottom of styles TA, SA and FA Finvector and the finished floor level. Styles TAI, SAI and FAI may be fitted to the finished floor level. Maintenance Maintenance consists of annually cleaning the heating element with a vacuum cleaner, checking the operation of dampers when fitted, and purging any air which may have accumulated in the elements. Replacement Parts The Dunham-Bush guarantee which forms part of out conditions of sale, covers the supply of replacement parts for a period of one year. Prices, Conditions of Sale Prices Dunham-Bush Ltd do not issue price lists, but will be pleased to supply a written quotation on request. Conditions of Sale The standard Dunham-Bush conditions of sale are printed on the reverse side of all quotations forms and order acknowledgement forms. Additional copies are available upon request. Supply Availability Finvector is supplied direct from our factory and is not available from stockists. The lead time varies with demand and should therefore be checked at ordering stage. A list of Field Sales Offices and Agents is shown on the back cover. Packaging Finvector is supplied in component form and all components are properly packed. The large items frontplates, antistreak sealing strips, backplates (where supplied), damper blades for aluminium grille styles (where supplied) and elements are packed in bundles and shrink wrapped. Brackets, make-up plates, end caps and corner pieces, etc are packed in clearly labelled boxes. On receipt of a consignment of Finvector, refer to the packing list supplied with advice note and check off the material supplied. Please advise of any shortages or damage immediately. Packing Finvector components shall be properly packed and labelled. Miscellaneous items shall be packed in clearly labelled boxes. Ordering To minimise any delay in processing your order, please refer to the quotation number and any previous correspondence. Please supply a building drawing of each floor, clearly marking where each type of Finvector casing is to be fitted. In addition, please advise the following:- 1. Are dampers required? 2. Are backplates required? 3. Casing finish, if other than standard. 4. Mark full dimensional details on building drawings i.e. overall length of each run, modular dimensions and dimensions of end modules. 5. If there are any projections such as columns which the Finvector is to run around, please provide a detailed sketch. 6. Details of preferred frontplates and make-up plate arrangement, giving partition thicknesses, where applicable. 7. Mark where end caps and corner pieces are required and state angle of each corner. 22
23 8. Element type and style, single or double row, length of elements and position in each casing run. 9. Are element adaptors required (steel tube only)? 10. Are expansion joints required? 11. Are expansion joint kits required? Delivery Finvector equipment is delivered to site in accordance with our conditions of sale. The buyer is responsible for offloading and storage. Hydrocourse Trench Finvector Hydrocourse Trench Finvector For applications where wall space is limited or unavailable for example where glazing extends to floor level, single or double row Trench Finvector may be the ideal solution. A steel duct casing is supplied for installation in a preconstructed floor trench or suspended floor. It is provided with element supports, baffles, anodised aluminium support angles and anodised aluminium roll or rigid grille. Levelling screws allow the height to be easily adjusted, flush with any chosen floor covering. Please contact Dunham-Bush for more information. 23
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