Precision Radiators - Merriott · Vertical Precision radiators are available in heights from 600mm...

Precision RadiatorsHorizontal and Vertical

www.merriottuk.comwww.merriott.ie

Revision: November 2019

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.

Content

04-05Technical Specifications – Horizontal

Range Overview 02

Range Options - Horizontal 03

27Connection Options

26Feet Options

25Security Bracket Details

18Range Options – Vertical

28Correction Factors

06-17Heat Outputs – Horizontal

17Technical Specifications – Vertical

23-24Mounting Options

21-22Heat Outputs – Vertical

29-30Resistance Diagram

02

Product DescriptionMerriott Precision radiators are horizontal and vertical tubular panel radiators offering a high quality design with a high heat output.

Precision horizontal radiators offer outputs ranging from 74 watts to 7902 watts at ΔT50˚C. Precision vertical radiator offers outputs ranging from 248W to 4199 W at ΔT50˚C. Higher heat outputs can be achieved using non-standard radiators.

The height of the horizontal radiator increases in increments of 72.5mm, from a minimum of 143mm through to 868mm. The horizontal radiator length always relates to the overall front panel length, and increases in increments of 100mm, from a minimum of 500mm through to 3000mm.

Vertical Precision radiators are available in heights from 600mm to 3000mm in 100mm increments. The length of the vertical radiator increases in increments of 72.5mm, from a minimum of 288mmm to a maximum of 868mm.

Outputs All Merriott Precision radiators have been manufactured and tested in accordance with EN442.

Finish Every Merriott Precision radiator undergoes an intensive pre-treatment process to protect against rust. In pre-treatment, the radiators are degreased, coated with iron phosphate and rinsed prior to painting. A cathodic electrodeposition primer coating is then applied 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 180˚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 on request.

Range Overview Horizontal - Vertical

PackagingThe 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) ABCDwith 1/2" (15mm) blank plug and Vent (BOE or TBOE) Other connections available include:- EF, FE, GE, HF, GH and HG - Combinations must be stated at time of ordering

For alternative connection options please see connection ladder on page 27.

TestingThe standard test pressure is 7 Bar giving a maximum operating pressure of 5.38 Bar.

Dimensional Tolerances Dimensional tolerances are in accordance with EN442.

MaterialsMerriott radiators are manufactured from flat steel tubes, 70mm x 11mm, with a standard thickness of 1.5mm.

MountingMounting supports at the rear of the radiator fix securely to wall-mounted brackets. Floor-mounted supports (feet) are available on request.

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 British Standard Code of Practice for Water Based Heating Systems in Buildings BS EN 12828:2012+A1:2014 and BS EN 12831: 2003. 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.

All dimensions are in mm

03

Range Options - Horizontal

Standard Range

H11 H20

H21

Single panel radiator. No convector fin

H22S

Single panel radiator with one convector fin Double panel radiator. No convector fin

Double panel radiator with one convector fin Double panel radiator with two convector fins face to face in centre of the panels

• All radiators are available with full fin or reduced fin. For radiators lower than 288mm high, a full fin product is recommended to maximise output• Reduced fin is always reduced from the top - never the bottom• A heavy duty grille is available for reduced fin radiators only. Note: There is a small reduction in output when fitted with a grille.

Reduced fin optionReduced fin option

Reduced fin option

Full fin option

Full fin optionFull fin option

H10

Height (mm) Tubes

Water Content (Ltr) Weight/m Length (Kg)

H10/H11 H20/H21/H22s H10

H11H20

H21 H22s

Full Fin Reduced Fin Full Fin Reduced

Fin Full Fin Reduced Fin

143 2 1.16 2.32 4.44 5.71 8.09 9.75 11.42215 3 1.74 3.48 6.65 8.57 12.13 14.63 17.13288 4 2.32 4.64 8.87 11.42 10.59 16.18 19.51 16.65 22.84 21.17360 5 2.90 5.80 11.09 14.28 13.44 20.22 24.38 21.53 28.55 26.88433 6 3.48 6.96 13.31 17.13 16.30 24.26 29.26 26.41 34.26 32.59505 7 4.06 8.12 15.52 19.99 19.15 28.31 34.14 31.28 39.97 38.30578 8 4.64 9.28 17.74 22.84 22.01 32.35 39.02 36.16 45.68 44.01650 9 5.22 10.44 19.96 25.70 24.86 36.39 43.89 41.04 51.39 49.72723 10 5.80 11.60 22.18 28.55 27.72 40.44 48.77 45.91 57.10 55.43795 11 6.38 12.76 24.39 31.41 30.57 44.48 53.65 50.79 62.81 61.14868 12 6.96 13.92 26.61 34.26 33.43 48.53 58.52 55.67 68.52 66.85

04

Technical Specification Precision Horizontal

Type H10 - Standard model shown with 1/2" (15mm) ABCD connections


Type H20 - Standard model shown with 1/2" (15mm) ABCD connections99

78

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V10 page 22

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8

LN2 TYPE BRACKET

20

05


Type H22S - Standard model shown with 1/2" (15mm) ABCD connections

Technical Specification Precision Horizontal

For connection details, see page 27.

06

Style: H10 H11 (Full Fin) H20 H21 (Full Fin) H22S (Full Fin)

Length Output (Watts)

(mm) ΔT50 ΔT50 ΔT50 ΔT50 ΔT50500 74 134 141 218 330600 88 161 169 262 395700 103 188 197 305 461800 118 214 225 349 527900 132 241 253 392 5931000 147 268 281 436 6591100 162 295 309 480 7251200 176 322 337 523 7911300 191 348 365 567 8571400 206 375 393 610 9231500 221 402 422 654 9891600 235 429 450 698 10541700 250 456 478 741 11201800 265 482 506 785 11861900 279 509 534 828 12522000 294 536 562 872 13182100 309 563 590 916 13842200 323 590 618 959 14502300 338 616 646 1003 15162400 353 643 674 1046 15822500 368 670 703 1090 16482600 382 697 731 1134 17132700 397 724 759 1177 17792800 412 750 787 1221 18452900 426 777 815 1264 19113000 441 804 843 1308 1977

Heat Outputs Precision Horizontal - 143mm high

All outputs are in accordance with BS EN442 certification. Outputs for reduced fin radiator can be found on page 17.

07



(mm) ΔT50 ΔT50 ΔT50 ΔT50 ΔT50500 108 196 206 312 453600 130 235 247 374 544700 151 274 288 436 634800 173 314 330 498 725900 194 353 371 561 8151000 216 392 412 623 9061100 238 431 453 685 9971200 259 470 494 748 10871300 281 510 536 810 11781400 302 549 577 872 12681500 324 588 618 935 13591600 346 627 659 997 14501700 367 666 700 1059 15401800 389 706 742 1121 16311900 410 745 783 1184 17212000 432 784 824 1246 18122100 454 823 865 1308 19032200 475 862 906 1371 19932300 497 902 948 1433 20842400 518 941 989 1495 21742500 540 980 1030 1558 22652600 562 1019 1071 1620 23562700 583 1058 1112 1682 24462800 605 1098 1154 1744 25372900 626 1137 1195 1807 26273000 648 1176 1236 1869 2718



08



(mm) ΔT50 ΔT50 ΔT50 ΔT50 ΔT50500 144 259 273 410 568600 172 311 327 492 682700 201 363 382 574 795800 230 414 436 656 909900 258 466 491 738 10221000 287 518 545 820 11361100 316 570 600 902 12501200 344 622 654 984 13631300 373 673 709 1066 14771400 402 725 763 1148 15901500 431 777 818 1230 17041600 459 829 872 1312 18181700 488 881 927 1394 19311800 517 932 981 1476 20451900 545 984 1036 1558 21582000 574 1036 1090 1640 22722100 603 1088 1145 1722 23862200 631 1140 1199 1804 24992300 660 1191 1254 1886 26132400 689 1243 1308 1968 27262500 718 1295 1363 2050 28402600 746 1347 1417 2132 29542700 775 1399 1472 2214 30672800 804 1450 1526 2296 31812900 832 1502 1581 2378 32943000 861 1554 1635 2460 3408



09



(mm) ΔT50 ΔT50 ΔT50 ΔT50 ΔT50500 179 341 338 490 675600 214 409 406 587 809700 250 477 473 685 944800 286 545 541 783 1079900 321 613 608 881 12141000 357 681 676 979 13491100 393 749 744 1077 14841200 428 817 811 1175 16191300 464 885 879 1273 17541400 500 953 946 1371 18891500 536 1022 1014 1469 20241600 571 1090 1082 1566 21581700 607 1158 1149 1664 22931800 643 1226 1217 1762 24281900 678 1294 1284 1860 25632000 714 1362 1352 1958 26982100 750 1430 1420 2056 28332200 785 1498 1487 2154 29682300 821 1566 1555 2252 31032400 857 1634 1622 2350 32382500 893 1703 1690 2448 33732600 928 1771 1758 2545 35072700 964 1839 1825 2643 36422800 1000 1907 1893 2741 37772900 1035 1975 1960 2839 39123000 1071 2043 2028 2937 4047



10



(mm) ΔT50 ΔT50 ΔT50 ΔT50 ΔT50500 223 397 405 567 778600 267 476 485 680 933700 312 556 566 793 1089800 356 635 647 906 1244900 401 715 728 1020 14001000 445 794 809 1133 15551100 490 873 890 1246 17111200 534 953 971 1360 18661300 579 1032 1052 1473 20221400 623 1112 1133 1586 21771500 668 1191 1214 1700 23331600 712 1270 1294 1813 24881700 757 1350 1375 1926 26441800 801 1429 1456 2039 27991900 846 1509 1537 2153 29552000 890 1588 1618 2266 31102100 935 1667 1699 2379 32662200 979 1747 1780 2493 34212300 1024 1826 1861 2606 35772400 1068 1906 1942 2719 37322500 1113 1985 2023 2833 38882600 1157 2064 2103 2946 40432700 1202 2144 2184 3059 41992800 1246 2223 2265 3172 43542900 1291 2303 2346 3286 45103000 1335 2382 2427 3399 4665



11



(mm) ΔT50 ΔT50 ΔT50 ΔT50 ΔT50500 264 451 472 640 875600 316 541 566 768 1049700 369 631 660 896 1224800 422 721 754 1024 1399900 474 811 849 1152 15741000 527 901 943 1280 17491100 580 991 1037 1408 19241200 632 1081 1132 1536 20991300 685 1171 1226 1664 22741400 738 1261 1320 1792 24491500 791 1352 1415 1920 26241600 843 1442 1509 2048 27981700 896 1532 1603 2176 29731800 949 1622 1697 2304 31481900 1001 1712 1792 2432 33232000 1054 1802 1886 2560 34982100 1107 1892 1980 2688 36732200 1159 1982 2075 2816 38482300 1212 2072 2169 2944 40232400 1265 2162 2263 3072 41982500 1318 2253 2358 3200 43732600 1370 2343 2452 3328 45472700 1423 2433 2546 3456 47222800 1476 2523 2640 3584 48972900 1528 2613 2735 3712 50723000 1581 2703 2829 3840 5247



12



(mm) ΔT50 ΔT50 ΔT50 ΔT50 ΔT50500 305 503 540 712 969600 365 604 648 854 1163700 426 704 756 996 1357800 487 805 864 1138 1550900 548 905 972 1281 17441000 609 1006 1080 1423 19381100 670 1107 1188 1565 21321200 731 1207 1296 1708 23261300 792 1308 1404 1850 25191400 853 1408 1512 1992 27131500 914 1509 1620 2135 29071600 974 1610 1728 2277 31011700 1035 1710 1836 2419 32951800 1096 1811 1944 2561 34881900 1157 1911 2052 2704 36822000 1218 2012 2160 2846 38762100 1279 2113 2268 2988 40702200 1340 2213 2376 3131 42642300 1401 2314 2484 3273 44572400 1462 2414 2592 3415 46512500 1523 2515 2700 3558 48452600 1583 2616 2808 3700 50392700 1644 2716 2916 3842 52332800 1705 2817 3024 3984 54262900 1766 2917 3132 4127 56203000 1827 3018 3240 4269 5814



13



(mm) ΔT50 ΔT50 ΔT50 ΔT50 ΔT50500 345 554 609 780 1060600 413 664 730 936 1271700 482 775 852 1092 1483800 551 886 974 1248 1695900 620 996 1095 1404 19071000 689 1107 1217 1560 21191100 758 1218 1339 1716 23311200 827 1328 1460 1872 25431300 896 1439 1582 2028 27551400 965 1550 1704 2184 29671500 1034 1661 1826 2340 31791600 1102 1771 1947 2496 33901700 1171 1882 2069 2652 36021800 1240 1993 2191 2808 38141900 1309 2103 2312 2964 40262000 1378 2214 2434 3120 42382100 1447 2325 2556 3276 44502200 1516 2435 2677 3432 46622300 1585 2546 2799 3588 48742400 1654 2657 2921 3744 50862500 1723 2768 3043 3900 52982600 1791 2878 3164 4056 55092700 1860 2989 3286 4212 57212800 1929 3100 3408 4368 59332900 1998 3210 3529 4524 61453000 2067 3321 3651 4680 6357



14



(mm) ΔT50 ΔT50 ΔT50 ΔT50 ΔT50500 384 603 679 848 1148600 461 724 815 1018 1378700 538 844 951 1187 1607800 614 965 1086 1357 1837900 691 1085 1222 1526 20661000 768 1206 1358 1696 22961100 845 1327 1494 1866 25261200 922 1447 1630 2035 27551300 998 1568 1765 2205 29851400 1075 1688 1901 2374 32141500 1152 1809 2037 2544 34441600 1229 1930 2173 2714 36741700 1306 2050 2309 2883 39031800 1382 2171 2444 3053 41331900 1459 2291 2580 3222 43622000 1536 2412 2716 3392 45922100 1613 2533 2852 3562 48222200 1690 2653 2988 3731 50512300 1766 2774 3123 3901 52812400 1843 2894 3259 4070 55102500 1920 3015 3395 4240 57402600 1997 3136 3531 4410 59702700 2074 3256 3667 4579 61992800 2150 3377 3802 4749 64292900 2227 3497 3938 4918 66583000 2304 3618 4074 5088 6888



15



(mm) ΔT50 ΔT50 ΔT50 ΔT50 ΔT50500 422 651 750 913 1233600 506 781 900 1096 1480700 590 911 1050 1278 1726800 674 1042 1200 1461 1973900 759 1172 1350 1643 22191000 843 1302 1500 1826 24661100 927 1432 1650 2009 27131200 1012 1562 1800 2191 29591300 1096 1693 1950 2374 32061400 1180 1823 2100 2556 34521500 1265 1953 2250 2739 36991600 1349 2083 2400 2922 39461700 1433 2213 2550 3104 41921800 1517 2344 2700 3287 44391900 1602 2474 2850 3469 46852000 1686 2604 3000 3652 49322100 1770 2734 3150 3835 51792200 1855 2864 3300 4017 54252300 1939 2995 3450 4200 56722400 2023 3125 3600 4382 59182500 2108 3255 3750 4565 61652600 2192 3385 3900 4748 64122700 2276 3515 4050 4930 66582800 2360 3646 4200 5113 69052900 2445 3776 4350 5295 71513000 2529 3906 4500 5478 7398



16



(mm) ΔT50 ΔT50 ΔT50 ΔT50 ΔT50500 459 698 823 978 1317600 550 838 988 1173 1580700 642 977 1152 1369 1844800 734 1117 1317 1564 2107900 825 1256 1481 1760 23711000 917 1396 1646 1955 26341100 1009 1536 1811 2151 28971200 1100 1675 1975 2346 31611300 1192 1815 2140 2542 34241400 1284 1954 2304 2737 36881500 1376 2094 2469 2933 39511600 1467 2234 2634 3128 42141700 1559 2373 2798 3324 44781800 1651 2513 2963 3519 47411900 1742 2652 3127 3715 50052000 1834 2792 3292 3910 52682100 1926 2932 3457 4106 55312200 2017 3071 3621 4301 57952300 2109 3211 3786 4497 60582400 2201 3350 3950 4692 63222500 2293 3490 4115 4888 65852600 2384 3630 4280 5083 68482700 2476 3769 4444 5279 71122800 2568 3909 4609 5474 73752900 2659 4048 4773 5670 76393000 2751 4188 4938 5865 7902



17

Heat Outputs Per Metre Precision Horizontal - Reduced Fin

H11

H21

H22S

Panel Height (mm) 288 360 433 505 578 650 723 795Fin Height (mm) 215 288 360 433 505 578 650 723

Output at ΔT50 (W) 502 632 723 817 918 1024 1138 1258


Output at ΔT50 (W) 1063 1264 1455 1634 1807 1969 2126 2274

A heavy duty grille is available for reduced fin Precisions radiators only. There is a small reduction in output when a heavy duty grille is used.


Output at ΔT50 (W) 804 960 1110 1253 1392 1525 1655 1780

18

Range Options - Vertical

V10Single Vertical PanelNo Convector Fin

Height: Ranges from 600mm to 3000mm in increments of 100mm.

Length: Ranges from 288mm to 868mm in increments of 72.5mm

Vertical Precision radiators can be manufactured with side grilles. This must be specified at the point of order as retro fit grilles are not available.

V20Double Vertical PanelNo Convector Fin

19

Height(mm)

Dry Weight(Kg)

Water Content(Ltr)

Surface area(sqm)

600 1.24 0.33 0.09

700 1.43 0.38 0.12

800 1.63 0.44 0.13

900 1.84 0.49 0.15

1000 2.04 0.55 0.17

1100 2.25 0.59 0.18

1200 2.56 0.71 0.21

1300 2.75 0.75 0.22

1400 2.94 0.78 0.24

1500 3.13 0.82 0.25

1600 3.32 0.85 0.27

1700 3.51 0.89 0.28

1800 3.70 0.93 0.30

1900 3.89 1.01 0.31

2000 4.08 1.09 0.33

2100 4.26 1.18 0.34

2200 4.45 1.26 0.36

2300 4.64 1.34 0.37

2400 4.83 1.43 0.39

2500 5.01 1.51 0.40

2600 5.20 1.59 0.42

2700 5.39 1.67 0.43

2800 5.58 1.76 0.45

2900 5.77 1.84 0.47

3000 5.95 1.93 0.48

V10 V20

Technical Data Per ElementPrecision Vertical

Height(mm)

Dry Weight(Kg)

Water Content(Ltr)

Surface area(sqm)

600 2.33 0.73 0.19

700 2.72 0.85 0.22

800 3.11 0.97 0.25

900 3.51 1.09 0.28

1000 3.89 1.22 0.32

1100 4.28 1.34 0.35

1200 4.83 1.46 0.39

1300 5.21 1.57 0.42

1400 5.55 1.72 0.45

1500 5.94 1.81 0.48

1600 6.29 1.96 0.51

1700 6.67 2.06 0.54

1800 7.03 2.20 0.57

1900 7.40 2.31 0.60

2000 7.78 2.44 0.63

2100 7.96 2.50 0.66

2200 8.14 2.55 0.69

2300 8.34 2.62 0.72

2400 8.54 2.68 0.75

2500 9.30 2.93 0.79

2600 10.06 3.17 0.82

2700 10.44 3.29 0.85

2800 10.82 3.41 0.88

2900 11.20 3.53 0.91

3000 11.58 3.65 0.94

20

V10 EF/BD/AC Connections

Technical Specification Precision Vertical

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25 38

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7768

EF/BD/AC Connections


LN2 TYPEBRACKET

A2 TYPEBRACKET

V20 EF/BD/AC Connections

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9

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25 38

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LN2 TYPEBRACKET

A2 TYPEBRACKET

21

Height(mm)

Output at ΔT50 (Watts)Length (mm)

288 360 433 505 578 650 723 795 868

600 248 296 345 393 441 490 538 586 635

700 279 334 390 445 501 557 612 668 723

800 309 372 435 498 561 623 686 749 812

900 340 410 480 550 620 690 760 830 900

1000 371 448 525 602 680 757 834 911 989

1100 397 486 575 662 749 833 918 1001 1084

1200 429 526 623 716 810 902 993 1083 1174

1300 462 566 670 771 872 970 1069 1165 1263

1400 494 606 717 825 933 1038 1144 1247 1351

1500 527 646 764 879 994 1106 1219 1329 1440

1600 559 686 811 933 1056 1175 1294 1411 1529

1700 592 725 858 988 1117 1243 1370 1493 1618

1800 624 765 906 1042 1178 1311 1445 1576 1707

1900 657 805 953 1096 1240 1380 1521 1658 1796

2000 690 845 1000 1151 1302 1449 1596 1740 1886

2100 723 886 1048 1206 1363 1517 1672 1823 1975

2200 755 926 1096 1260 1425 1586 1748 1906 2065

2300 788 966 1143 1315 1488 1656 1824 1989 2155

2400 822 1007 1191 1371 1550 1725 1901 2073 2246

2500 855 1048 1240 1426 1613 1795 1978 2157 2336

2600 888 1088 1288 1482 1676 1865 2055 2241 2428

2700 922 1129 1336 1538 1739 1935 2132 2325 2519

2800 955 1171 1385 1594 1802 2006 2210 2410 2611

2900 989 1212 1434 1650 1866 2077 2288 2495 2703

3000 1023 1254 1483 1707 1930 2148 2367 2581 2796

Heat Outputs Precision Vertical - V10

All outputs are in accordance with BS EN442 certification.

22

Heat Outputs Precision Vertical - V20

Height(mm)

Output at ΔT50 (Watts)Length (mm)

288 360 433 505 578 650 723 795 868

600 360 441 521 599 677 753 829 903 978

700 413 505 597 686 776 863 950 1036 1121

800 465 569 672 773 873 971 1070 1166 1263

900 516 632 747 858 970 1079 1188 1295 1402

1000 567 694 820 943 1066 1185 1305 1423 1540

1100 617 756 893 1027 1161 1291 1422 1549 1678

1200 667 817 966 1110 1255 1396 1537 1675 1814

1300 717 878 1038 1193 1349 1500 1652 1800 1949

1400 767 939 1110 1276 1442 1604 1766 1925 2084

1500 816 999 1181 1358 1535 1707 1880 2048 2218

1600 865 1059 1252 1440 1627 1810 1993 2172 2352

1700 915 1119 1323 1521 1719 1912 2106 2295 2485

1800 963 1179 1394 1603 1811 2014 2218 2418 2618

1900 1012 1239 1465 1684 1903 2116 2331 2540 2750

2000 1061 1299 1535 1765 1994 2218 2443 2662 2883

2100 1109 1358 1605 1845 2086 2320 2555 2784 3015

2200 1158 1417 1676 1926 2177 2421 2666 2906 3147

2300 1206 1477 1746 2007 2268 2523 2778 3028 3278

2400 1255 1536 1816 2087 2359 2624 2890 3149 3410

2500 1303 1595 1886 2168 2450 2725 3001 3271 3542

2600 1352 1655 1956 2248 2541 2826 3112 3392 3673

2700 1400 1714 2026 2329 2632 2927 3224 3513 3804

2800 1448 1773 2096 2409 2723 3028 3335 3635 3936

2900 1497 1832 2166 2490 2814 3130 3447 3756 4067

3000 1545 1891 2236 2570 2905 3231 3558 3878 4199

All outputs are in accordance with BS EN442 certification.

23

Mounting Details

Bracket location for Precisions Horizontal 500mm - 3000mm long (see page 24 for diagrams)

Length (mm) 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

'H’ 140 150 150 140 150 140 150 150 140 150 150 140 150

'J’ 220 300 400 520 600 720 800 900 1020 1100 1200 1320 700

'K’ 140 150 150 140 150 140 150 150 140 150 150 140 700

'L’ - - - - - - - - - - - - 150

'M’ - - - - - - - - - - - - -

Length (mm) 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000

'H’ 150 150 150 140 150 150 140 150 150 140 150 140 150

'J’ 720 800 820 900 920 1000 1060 1100 1120 1200 1220 1300 900

'K’ 780 800 880 920 980 1000 1060 1100 1180 1220 1280 1320 900

'L’ 150 150 150 140 150 150 140 150 150 140 150 140 900

'M’ - - - - - - - - - - - - 150

Wall Brackets

A2 Type bracketHorizontal: H11, H20, H21 & H22S

Vertical: V20 Part Number: DESA2K3/ K1R

LN2 Type bracketHorizontal: H10

Vertical: V10Part Number: DESLN2K2

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LN2 TYPE BRACKET

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Bracket locations for all Precision Vertical (V10 & V20)

HE

IGH

T: 1

600m

m to

190

0mm

40

200

200

40

HEI

GH

T: 2

000m

m to

300

0mm

=20

0

40

200

=

40

HE

IGH

T: 6

00m

m to

190

0mm

200

200

8888

88

HE

IGH

T: 2

000m

m to

300

0mm

88

200

=20

0=

Bracket locations for all Prevision Vertical

V10 & V20V11

Vertical bracket positions page 27

24

Bracket location for Precisions Horizontal 500mm - 3000mm long

Mounting Details

143mm High

mm mm

mm

mm

mm

LENGTH 1601-2900 LENGTH 2901-3000LENGTH 400-1600




215mm High

mm mm

mm

mm

mm





288mm High

mm mm

mm

mm

mm





360mm - 868mm Highmm mm

mm

mm

mm





25

Merriott offers a high security bracket for horizontal Precision radiators, designed for use in areas where robustness is required and safety is paramount.

This bracket comes in 3 parts. Below shows a side view of how it fits on to the radiator, and the resultant dimension from wall to front of radiator.

Part Numbers: H10 & H11: HMPSBT1H20 & H21: HMPSBB1H22S: HMPSBB3

Security Bracket Details

H22S

H20/H21H11H10

RadiatorHeight (mm)

'X'(mm)

<360 100>360 140

8mm 'J' Bolt

26

Feet Options

Welded FeetThese are factory fitted (welded to the radiator) which minimises installation time for the client. All horizontal and vertical Precision radiators can be mounted on welded feet. Standard feet height is 100mm, however any height can be specified with a minimum height of 50mm.

Bolt-on FeetAll horizontal and vertical Precision radiators, except the H10 and V10, can be mounted on bolt-on feet. Plates are welded to underside of radiator in the factory and the foot installed using M8 bolts onsite (2 per foot). This means the radiator can be removed easily with minimal fuss. Standard feet height is 100mm, however any height can be specified with a minimum height of 50mm.

Merriott recommends that for all radiators with an EF connection configuration the foot height be at least 150mm to allow for valves and others items.

Extended headers with foot mount are available on all horizontal Precision radiators. They are generally adopted when pipework is to be concealed under a raised access floor. Foot height and connection orientation of the feet should be specified at point of order.

The height of the extended header feet is in increments of 72.5mm. Other heights are available on request.

The height of the centre of the connection off the ground will always be 25mm and this connection will always be a 1/2'' (15mm) BSP.

Loose FeetAll horizontal Precision radiators with convector fins can be mounted on loose feet. These are ideal where additional support is required due to the weight of the radiator and integrity of the wall. The feet are secured to the floor and have prongs which fit between the fins and hold the unit steady. Standard feet height is 100mm, however any height can be specified with a minimum height of 50mm.

• Feet options must be specified at the time of order together with connection details, flow and return.• When the overall height of the radiator plus feet exceeds 505mm, wall brackets are required to ensure stability. • For horizontal radiators, the maximum height of radiator plus feet must not exceed 795mm long.

Additional floor bracket option (for support only)

Provides additional support when fixing heavy vertical radiators to existing walls with questionable construction

Part Number: DESFOOT

QRL Radiator Group, Imperial Park, Celtic Way, Newport NP10 8FSTel. : +44 (0) 1633 657081 Fax. : +44 (0) 1633 681864

SURFACE TEXTURE IN MICROMETERSREMOVE SHARP EDGESTOLERANCES EXCEPT WHEREOTHERWISE STATEDDIMENSIONAL 0.2 ANGULAR 1

ISS Modification App'd DateChg'd

This drawing is confidential and is not to be disclosed to any third party without written permission of Quinn Radiators Limited PROJECTION

DateApprovedCheckedDrawn

Drg. No. Iss.Material :IF IN DOUBT ASK!DO NOT SCALE Title :

ALL DIMENSIONS IN MILLIMETRES

ScaleMAKING PEOPLE WARMER

RADIATOR GROUP

Horizontal Precisions

Loose Foot Part Number: SUF022For extended feet, please enquire with Merriott Sales Office.

Welded Bolted

Loose Extended

Vertical Precisions

Bolted Welded

Bolted Foot & Top Plate Part Numbers: Foot: SUF020-100 Top Plate: SUF019-TP

Welded Foot Part Number: SUF026-100

27Loose Foot Part Number: SUF022For extended feet, please enquire with Merriott Sales Office.

Opposite Right

Right (ORR)

Top and side grillesTop/side grilles are available at an extra cost. They are only suitable for reduced fin radiators for horizontal models and may be fitted to all vertical models. Please specify at the time of quote.

Series RadiatorsAll Precision radiators can be connected in series by a special connector piece. The maximum length of radiators is 18 metres. Radiators that are joined will have an extra 20mm added on to the length per connector used.

Radiators need to be coded at the time of ordering to ensure correct location for baffles and vents. Please contact your sales office prior to ordering series radiators. Below are four recommended combinations:

Same end, flow from left Same end, flow from right

Opposite end, flow from left Opposite end, flow from right

B = Baffle, D = Drain, V = Vent

Connection VariationsA, B, C, D, E, F, G and H are connection positions. The standard connection configuration for Horizontal radiators is BDAC, for Vertical radiators 6 connections are as standard at EFABCD. Other connections configurations are available on request.

Connection Options

CONNECTION LADDER

G H

E FB D

A C

Opposite Left

Left (OLL)

Opposite Left

Centre (OLC)

Opposite Left

Right (OLR)

Same Left

Left (SLL)Same Left

Centre (SLC)

Same Left

Right (SLR)

Opposite Right

Left (ORL)

Opposite Right

Centre (ORC)

Same Right

Left (SRL)

Same Right

Centre (SRC)

Same Right

Right (SRR)

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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 10˚C and 80˚C. 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 Precision products are available from your local Merriott contact.

EXAMPLE:Required Room Temperature = 21˚C, Flow Temperature = 86˚C, Return Temperature = 72˚C

SOLUTION:Mean Water Temperature = (T Flow+T Return)/2 = (86+72)/2 = 79˚CΔT = Mean Water Temperature - Required Room Temperature = 79-21 = 58˚C

Correction Factors

From the tables below, the output for a Precision at ΔT58˚C is 1.206 times the output stated at ΔT50˚C.

ΔT (˚C) Based on ΔT50 ΔT (˚C) Based on ΔT5010 0.131 46 0.90011 0.148 47 0.92512 0.165 48 0.95013 0.182 49 0.97514 0.200 50 1.015 0.219 51 1.02516 0.237 52 1.05117 0.256 53 1.07618 0.275 54 1.10219 0.295 55 1.12820 0.314 56 1.15421 0.334 57 1.18022 0.355 58 1.20623 0.375 59 1.23324 0.396 60 1.25925 0.417 61 1.28626 0.438 62 1.31227 0.459 63 1.33928 0.481 64 1.36629 0.503 65 1.39330 0.524 66 1.42031 0.547 67 1.44732 0.569 68 1.47533 0.592 69 1.50234 0.614 70 1.53035 0.637 71 1.55836 0.660 72 1.58537 0.684 73 1.61338 0.707 74 1.64139 0.731 75 1.66940 0.754 76 1.69741 0.778 77 1.72642 0.802 78 1.75443 0.826 79 1.78244 0.851 80 1.81145 0.875

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100 1000 10,000100.1

1

10

100

1000

Pres

sure

Dro

p Δ

PW (m

Bar)

Flowrate Vw (l/hr)

SINGLE PANEL DOUBLE PANEL

How to calculate the resistance of a Precision radiator at ΔT 50˚C

Radiator type: H22s 1000mm LONG x 650mm HIGH full fin Output @ ΔT 50˚C: 2119W (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.

Calculate the flow rate as follows: 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 = 2119 / ((4187) X (10))m = 0.050609 (L/S) X 3600 (L/H)m = 182.2 L/H

Please refer to the resistance diagram which gives a value of approx 3.8m Bar.

Resistance DiagramHorizontal Precision radiators

30

How to calculate the resistance of a Vertical Precision radiator at ΔT 50˚C

Radiator type: V10 2000mm HIGH x 723mm LONGOutput @ ΔT 50˚C: 1596W (flow/return – 75/65˚C)

If the output is not at ΔT50˚C, please use the correction factor table on page 37 of this brochure to get the correct output.

Calculate the flow rate as follows: Q = (m) x (C) x (ΔT)

Output = (Flow Rate) (Constant) (Difference between flow and return temperature)

Watts = (l/s) (J/Kg˚C) (˚C)

1596 = (m) (4187) (18)

Therefore

m = 1596 / ((4187) x (18))

m = 0.021176 (L/S) x 3600 (L/H)

m = 76.24 litres per hour (l/hr)

Please refer to the resistance diagram which gives a value of approx 0.3m Bar .

100 1,000 10,000100.1

1

10

100

1,000Pr

essu

re D

rop

ΔPW

(mBa

r)

Flowrate Vw (l/hr)

SINGLE PANEL DOUBLE PANEL

Resistance DiagramVertical Precision radiators

31

Notes

Contact detailsMerriott UK & Ireland Purmo Group (UK) Ltd, Eastern Avenue, Team Valley,Gateshead, Tyne & Wear, NE11 0PGTel: 0330 0415 472

[email protected]@merriott.ie

www.merriottuk.com / www.merriott.ieFollow us on @merriottuk and

Precision Radiators - Merriott · Vertical Precision radiators are available in heights from 600mm...

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