Multicolumn Radiators

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Arlene Crawford
5 years ago
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1 Multicolumn Radiators

are the better choice for commercial applications across

This means investing in world-class production facilities,

backed by revolutionary technology, rigorous testing and

As a company, we have an unwavering commitment to

lead the way in design, performance and energy efficiency.

2 What does Merriott stand for? Merriott offers bespoke heating and cooling solutions that are the better choice for commercial applications across the UK and Ireland. This means investing in world-class production facilities, and manufacturing products of the very highest standard backed by revolutionary technology, rigorous testing and stringent quality control. As a company, we have an unwavering commitment to innovation and sustainability, pioneering products that lead the way in design, performance and energy efficiency. Underpinning all of this is our relationship with our customers: ensuring they can rely on best-in-class service and support, from specification right through to delivery.

3 Content Range Overview 02 Multicolumn Heat Outputs Pitch Plus Heat Outputs Mounting brackets Connection Options Joining Multicolumns 15 Correction Factors Resistance Diagram 16 17

4 Range Overview 02 Product Description Merriott Multicolumn is a classic design with a robust, clean and rounded finish. You can wall or floor mount the multicolumn and customise the connections. The Merriott Multicolumn radiators can be joined to achieve the radiator length required. They are joined by special joiner pieces to give the visual effect of one column. See page 15 for details. Available from four to six columns and in a horizontal and vertical configuration, it offers a great range of output from 24 watts to 542 watts per section at ΔT50C. The Merriott Pitch Plus features as part of the multicolumn radiator range. Pitch Plus is especially designed for environment where hygiene is a top priority. Its 66mm extended pitch makes it easier to clean, preventing the build up of dust and bacteria. Outputs All Merriott Multicolumns radiators have been manufactured and tested in accordance with EN442. Finish Every Merriott Multicolumn radiator undergoes an intensive pre-treatment process to protect against rust. In pre-treatment, the radiators go through a series of washes which degrease the steel and an iron phosphate rinse passivates the surface prior to painting. The primer coat is applied by immersion in an electrophoretic bath to give total coverage of the bare steel and maximum corrosion protection. The durable topcoat (epoxy polyester powder) is electrostatically applied and stove enamel baked at 200 C. The process is monitored to ensure continuous achievement of optimum adhesion, opacity and gloss levels. Colour Our standard finish is semi-gloss RAL 9016 (white) in epoxy polyester powder. An extensive range of other RAL and BS colours are available, at an additional charge, on request. All dimensions are in mm. Packaging The entire surface of the radiator, including all 4 corners, is protected by cardboard box ends and packed in shrink wrapped polythene. Connections Standard connections are 4 x 1 /2 (15mm) BSP connections. These can be used as BD, DB, AC, CA, AD, CE, AB and CD connection configurations. 1 /4, 3/8, 3 /4 and 1 1 /4 connections are available on request. See connection diagram on page 15. Note: Flow and return positions must be specified at time of ordering. Testing Merriott Multicolumns have been tested at 13 Bar with a maximum working pressure of 10 Bar. Feet The Multicolumn can be supplied with adjustable, double loose or design feet as an optional extra. Dimensional Tolerances Dimensional Tolerances are in accordance with EN442. Materials Multicolumn radiators are made from 1.2mm thick steel, forming tubes of a 25mm diameter. Warranty Merriott radiators are guaranteed for a period of 10 years from date of purchase in respect of defective materials and workmanship. The system should be designed in accordance with the British Standard Code of Practice for Water Based Heating Systems in Buildings BS EN 12828:2012+A1:2014 and BS EN 12831: The installation and commissioning of the system should comply with BS EN 14336:2004. On completion of the installation, the system should be properly flushed and filled in accordance with the British Code of Practice for the Treatment of Water in Domestic Hot Water Central Heating Systems BS 7593:2006, Part L of Building Regulations and Good Practice Guidance for Scotland. Merriott strongly recommends the use of corrosion inhibitor for all applications. Failure to observe these standards may invalidate the manufacturer s warranty.

5 Heat Outputs 2-column radiators Radiator height Water content per element (l) Dry weight per element (Kg) Elements Length Output at Δ T50 C (Watts) Greyed out sizes indicate weight of over 100kg Radiators can be joined to achieve required length - see page 15 03

6 Heat Outputs 3-column radiators Radiator height Water content per element (l) Dry weight per element (Kg) Elements Length Output at Δ T50 C (Watts) Greyed out sizes indicate weight of over 100kg Radiators can be joined to achieve required length - see page 15

7 Heat Outputs 4-column radiators Radiator height Water content per element (l) Dry weight per element (Kg) Elements Length Output at Δ T50 C (Watts) Greyed out sizes indicate weight of over 100kg Radiators can be joined to achieve required length - see page 15 05

8 Heat Outputs 5-column radiators Radiator height Water content per element (l) Dry weight per element (Kg) Elements Length Output at Δ T50 C (Watts) Greyed out sizes indicate weight of over 100kg Radiators can be joined to achieve required length - see page 15

9 Heat Outputs 6-column radiators Radiator height Water content per element (l) Dry weight per element (Kg) Elements Length Output at Δ T50 C (Watts) Greyed out sizes indicate weight of over 100kg Radiators can be joined to achieve required length - see page 15 07

10 Heat Outputs Pitch Plus 2-column radiators Radiator height Water content per element (l) Dry weight per element (Kg) Elements Length Output at Δ T50 C (Watts) Greyed out sizes indicate weight of over 100kg Radiators can be joined to achieve required length - see page 15

11 Heat Outputs Pitch Plus 3-column radiators Radiator height Water content per element (l) Dry weight per element (Kg) Elements Length Output at Δ T50 C (Watts) Greyed out sizes indicate weight of over 100kg Radiators can be joined to achieve required length - see page 15 09

12 Heat Outputs Pitch Plus 4 -column radiators Radiator height Water content per element (l) Dry weight per element (Kg) Elements Length Output at Δ T50 C (Watts) Greyed out sizes indicate weight of over 100kg Radiators can be joined to achieve required length - see page 15

13 Heat Outputs Pitch Plus 5-column radiators Radiator height Water content per element (l) Dry weight per element (Kg) Elements Length Output at Δ T50 C (Watts) Greyed out sizes indicate weight of over 100kg Radiators can be joined to achieve required length - see page 15 11

14 Heat Outputs Pitch Plus 6-column radiators Radiator height Water content per element (l) Dry weight per element (Kg) Elements Length Output at Δ T50 C (Watts) Greyed out sizes indicate weight of over 100kg Radiators can be joined to achieve required length - see page 15

15 Mounting Details Wall mounting option Wall brackets are supplied as standard in white. Other options are available on request. Top fixing bracket Bottom fixing bracket 2-column 3-column 4-column 5-column 6-column 13

16 Mounting Details Floor-mounting option Multicolumn radiators mounted on feet cannot be freestanding when the total height including feet exceeds 500mm. All feet are bolted on to the radiators. For any further queries, please contact the Merriott Sales Office. Adjustable foot. Double loose foot Note: L represent the radiator depth depending on the amount of columns. Design foot 14

17 Joining Multicolumn radiators One or more multicolumn radiators can be joined to achieve the radiator length required. They are joined by a special connector piece, a nipple, which provides the look of one radiator. Multicolumn radiators are made in sections of 46mm or 66mm pitch and therefore the length will always be a multiple of 46 or 66. To work out the number of radiators that need to be joined for any one length, please refer to the number of sections per single radiator in the product specific heat output tables (page 3-12). Example: To make up a standard 2700mm long 3-column radiator, you need a radiator of 59 sections. You will then be supplied with a 36-section radiator (1682mm long) and a 23-section radiator (1084mm long), giving you a multicolumn radiator of a total length of 2714mm. Connection Options Connection Ladder AD connection AB connection G H A C B E F D Connection sizes available 1/2 (15mm) 3/4 (20mm) 1 (25mm) Opposite Connections Side Connections AC connection BD connection EF connection Top connections with flow diverter (baffle). *Additional cost for these connections Bottom connections - less than 15 sections or greater than 1 metre high will require flow diverter (baffle). *Additional cost for these connections Bottom connections with 1/2 bushes with flow diverter (baffle). *Additional cost for these connections Note: Flow and return positions must be specified at point of order 15

18 Correction Factors The outputs quoted in this brochure are based on a Δ T of 50 C. Listed below are the multiplying factors needed to calculate the output at other Delta Ts (ΔTs) between 10ºC and 80ºC. This is done by multiplying your heat output with the appropriate correction factor selected from the table below. Please note more detailed correction factors for multicolumn products are available from your local Merriott contact. EXAMPLE: Required Room Temperature = 21 C, Low Temperature = 86 C, Return Temperature = 72 C SOLUTION: Mean Water Temperature = (T Flow+T Return)/2 = (86+72)/2 = 79 C ΔT = Mean Water Temperature - Required Room Temperature = = 58 C From the tables below, the output for a Multicolumn at ΔT58 C is times the output stated at ΔT50 C. 16 ΔT( C) Based on ΔT50 ΔT( C) Based on ΔT

19 Resistance Diagram Pressure Drop W(mBar) 1 MULTICOLUMN ,000 Flowrate Vw (l/hr) How to calculate the resistance of a Multicolumn at ΔT 50 C Radiator type: MMC3 1012mm LONG x 600mm HIGH ΔT 50 C: 1342W (flow/return 75/65 C) If the output is not at ΔT50 C, please use the correction factor table on the previous page to get the correct output. C Specific Heat Constant (always 4187 J/kg C) Q (m) x (C) x (ΔT) Output (flow rate) x (Constant) x (difference between flow and return temp) Watts (l/s) (J/kg C) ( C) 2703 (m) (4187) (10) Therefore m / ((4187) X (10)) m - m (L/S) X 3600 (L/H) L/H Please refer to the resistance diagram which gives a value of approx 9.5m Bar. 17

20 Contact details Merriott UK (Manufacturing Facility) QRL Radiator Group, Imperial Park, Newport, NP10 8FS Tel: +44 (0) Fax: +44 (0) UK Enquiries Tel: Fax: Merriott Ireland Derrylin, Co. Fermanagh, BT92 9AU Irish Enquiries Northern Ireland Tel: Fax: Republic of Ireland Tel: Fax: / Follow us and

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Touch Temperature LST www.merriottuk.com www.merriott.ie What does Merriott stand for? Merriott offers bespoke heating and cooling solutions that are the better choice for commercial applications across