Primo & Primo Plus

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.

03

Content

Range Overview 02

09n-Coefficients

Heat Outputs 04-05

Range Options 03

08Water Content & Dry Weights

Mounting Details 06-07

02

Product Range The Merriott Primo range comprises of single and double panel radiators available in heights from 300mm - 700mm and lengths from 400mm - 2400mm. The Primo Plus comes with factory fitted side panels and a top grille.

Outputs The outputs quoted in this brochure are based on a Delta T of 50˚C.

All Merriott Primo radiators have been manufactured and tested in accordance with EN 442.

FinishEvery Merriott Primo radiator undergoesan intensive pre-treatment process toprotect against rust. In pre-treatment, theradiators are degreased, coated with ironphosphate and rinsed prior to painting. Acathodic electrodeposition primer coating isthen applied to give total coverage of the baresteel and maximum corrosion protection. Thedurable topcoat (epoxy polyester powder) iselectrostatically applied and stove enamel bakedat 180˚C. The process is monitored to ensurecontinuous achievement of optimum adhesion,opacity and gloss levels.

PackagingAll Merriott radiators are packed in robust packaging specially designed to ensure that the product reaches you in perfect condition.

Testing All Primo radiators are tested to 10.5 Bar with a maximum working pressure of 8 Bar.

Brackets As standard, Merriott supply Primo radiators with strip brackets (as depicted on page 6).

Bracket Lugs Two pairs of lugs are fitted on radiators up to and including 1600mm long. A third pair of lugsis fitted centrally on radiators that are 1800mm long and over.

ConnectionsStandard connections are 4 x 1/2” BSP (15mm) ABCD. All tapping-to-tapping dimensions can be obtained by subtracting 5mm from the nominal radiator length (accuracy =+/- 2mm).

WarrantyMerriott 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.

Range Overview

All dimensions are in mm

03

Range OptionsExamples of Primo and Primo plus

Primo Single Panel Single Fin (Type 11)

Primo Double Panel Single Fin (Type 21)

Primo Plus Double Panel Double Fin (Type 22)

04

Nominal Length Single Panel Single Fin

Double Panel Single Fin

Double Panel Double Fin

Height mm Watts ΔT50 Watts ΔT50 Watts ΔT50

300mm

600 328 478 603800 - - 8041000 546 797 10051400 764 1116 14071800 983 1435 18092000 1092 - 20102400 1310 - 2412

400mm

500 356 504 641600 427 605 769700 498 706 897800 569 806 1026900 640 907 11541000 711 1008 12821100 782 1109 14101200 853 1210 15381300 924 1310 16671400 995 1411 17951600 1138 1613 20511800 1280 1814 2308

500mm

400 347 484 618500 434 605 773600 521 725 928700 608 846 1082800 694 967 1237900 781 1088 13911000 868 1209 15461100 955 -1200 1042 1451 18551300 1128 - 20101400 1215 1693 21641500 1302 - 23191600 1389 1934 24741800 1562 2176 27832000 1736 - 30922400 2083 - 3710

600mm

400 407 560 720500 509 700 900600 611 840 1079700 713 980 1259800 814 1120 1439900 916 1260 16191000 1018 1400 17991100 1120 1540 19791200 1222 1680 21591300 1323 1820 23391400 1425 1960 25191600 1629 2240 28781800 1832 2520 32382000 2036 - 35982400 2240 - 4318

700mm

400 464 633 817500 581 792 1022600 697 950 1226700 813 1108 1430800 929 1266 1634900 1045 1425 18391000 1161 1583 20431200 1393 1900 24521400 1625 2216 28601600 1858 2533 3269

Heat Outputs Primo Radiators

TYPE 11 TYPE 21 TYPE 22

All outputs are in accordance with BS EN 442 certification.

05

TYPE 11 TYPE 21 TYPE 22

Heat OutputsPrimo Plus Radiators

Nominal Length Single Panel Single Fin

Double Panel Single Fin

Double Panel Double Fin

Height mm Watts ΔT50 Watts ΔT50 Watts ΔT50

300mm

600 328 461 580800 - - 7731000 546 768 9661400 764 1075 13521800 983 1382 17392000 1092 - 19322400 1310 - 2318

400mm

500 356 486 616600 427 583 739700 498 681 863800 569 778 986900 640 875 11091000 711 972 12321100 782 1069 13551200 853 1166 14781300 924 1264 16021400 995 1361 17251600 1138 1555 19711800 1280 1750 2217

500mm

400 347 467 594500 434 584 742600 521 700 891700 608 817 1040800 694 933 1188900 781 1050 13361000 868 1167 14851100 955 - 16341200 1042 1400 17821300 1128 - 19311400 1215 1634 20791500 1302 - 22281600 1389 1867 23761800 1562 2101 26732000 1736 - 29702400 2083 - 3564

600mm

400 407 542 691500 509 678 863600 611 813 1036700 713 948 1209800 814 1084 1382900 916 1220 15541000 1018 1355 17271100 1120 1491 19001200 1222 1626 20721300 1323 1762 22451400 1425 1897 24181600 1629 2168 27631800 1832 2439 31092000 2036 - 34542400 2440 - 4145

700mm

400 464 615 783500 581 768 979600 697 922 1175700 813 1076 1370800 929 1229 1567900 1045 1383 17621000 1161 1537 19581200 1393 1844 23501400 1625 2152 27411600 1858 2459 3133

All outputs are in accordance with BS EN 442 certification.

06

Mounting DetailsPrimo

78

A

100

Min

100

Min

100

Min46

A

62

97 129

78

AB

17

6939

2224

78

A

100

Min

100

Min

100

Min46

A

62

97 129

78

AB

17

6939

2224

78

A

100

Min

100

Min

100

Min46

A

62

97 129

78

AB

17

6939

2224

78

A

100

Min

100

Min

100

Min46

A

62

97 129

78

AB

17

6939

2224

32.3

36.3

Bracket Plan ViewWall Bracket

Nominal A BHeight (mm) (mm) (mm)

300 250 142400 350 242500 450 342600 550 442700 650 542

Nominal CHeight (mm) (mm)

300 120400 220500 320600 420700 520

100

C

83

117

150

1800 & above = (L /2) - 50mm

150

117

83

100

133.3

166.6

1800 & above = L / 2

166.6

133.3

100

Type 11 Type 21, 22 & 33

1800 & above = (L /2) - 17mm

1800 & above = (L /2) + 17mm

L L

1800 & above = (L /2) + 33mm

1800 & above = (L /2) - 33mm

100

C

83

117

150

1800 & above = (L /2) - 50mm

150

117

83

100

133.3

166.6

1800 & above = L / 2

166.6

133.3

100

Type 11 Type 21, 22 & 33

1800 & above = (L /2) - 17mm

1800 & above = (L /2) + 17mm

L L

1800 & above = (L /2) + 33mm

1800 & above = (L /2) - 33mm

100

C

83

117

150

1800 & above = (L /2) - 50mm

150

117

83

100133.3

166.6

1800 & above = L / 2

166.6

133.3

100

Type 11 Type 21, 22 & 33

1800 & above = (L /2) - 17mm

1800 & above = (L /2) + 17mm

L L

1800 & above = (L /2) + 33mm

1800 & above = (L /2) - 33mm

Type 11 Type 21 Type 22

Mounting Positions, Dimensions and Wall Brackets

Bracket Positions and Dimensions

All measurements are nominal

07

Mounting DetailsPrimo Plus

Nominal AHeight (mm) (mm)

300 250400 350500 450600 550700 650

Nominal CHeight (mm) (mm)

300 120400 220500 320600 420700 520

100

C

83

117

150

1800 & above = (L /2) - 50mm

150

117

83

100

133.3

166.6

1800 & above = L / 2

166.6

133.3

100

Type 11 Type 21, 22 & 33

1800 & above = (L /2) - 17mm

1800 & above = (L /2) + 17mm

L L

1800 & above = (L /2) + 33mm

1800 & above = (L /2) - 33mm

100

C

83

117

150

1800 & above = (L /2) - 50mm

150

117

83

100

133.3

166.6

1800 & above = L / 2

166.6

133.3

100

Type 11 Type 21, 22 & 33

1800 & above = (L /2) - 17mm

1800 & above = (L /2) + 17mm

L L

1800 & above = (L /2) + 33mm

1800 & above = (L /2) - 33mm

100

C

83

117

150

1800 & above = (L /2) - 50mm

150

117

83

100133.3

166.6

1800 & above = L / 2

166.6

133.3

100

Type 11 Type 21, 22 & 33

1800 & above = (L /2) - 17mm

1800 & above = (L /2) + 17mm

L L

1800 & above = (L /2) + 33mm

1800 & above = (L /2) - 33mm

Type 11

Type 21 & 22

100

A

78

46

A A

100

10062 78

12997

Type 11 Type 21 Type 22

62 70 102

158

Min

Min 15

8

158

Min

Min M

in

Min

100

A

78

46

A A

100

10062 78

12997

Type 11 Type 21 Type 22

62 70 102

158

Min

Min 15

8

158

Min

Min M

in

Min

100

A

78

46

A A

100

10062 78

12997

Type 11 Type 21 Type 22

62 70 102

158

Min

Min 15

8

158

Min

Min M

in

Min

Type 11 Type 21 Type 22

Mounting Positions, Dimensions and Wall Brackets

Bracket Positions and Dimensions

All measurements are nominal

Nominal BHeight (mm) (mm)

300 142400 242500 342600 442700 542

Wall Brackets

Type 21 & 22Type 11 only

Supplied with Type 11, 21, 22

Type 11 only Type 21 & 22 Type 33 only

23

32

14

22.5

22.5

79

10

B+11

121532.5

5.6

239.6

SS

3214.6

B

24

22

39

17

69

SX&SD

Type 11 only Type 21 & 22 Type 33 only

23

32

14

22.5

22.5

79

10

B+11

121532.5

5.6

239.6

SS

3214.6

B

24

22

39

17

69

SX&SD

Radiator to wall distance: Any

Maximum load of a single bracket: Vertically - 180kg Pulling - 35kg

Order Code: RH033(single piece)

Floor Brackets for all types:

Height 300 - 600mmRadiator

length(mm)

Quantity of floor

brackets400 - 1800 2

2000 3

Height 700mmRadiator

length(mm)

Quantity of floor

brackets400 - 1200 2

1400 - 1600 3

08

Water Contents & Dry WeightsTo calculate, take the water content or dry weight per metre, divide by 1,000 and multiply by the length of the radiator desired.

Merriott Primo Plus Radiators

Merriott Primo Radiators

Water Content (L/M)300mm 400mm 500mm 600mm 700mm

Single Panel Single Fin (Type 11) 1.7 2.1 2.6 3.0 3.5

Double Panel Single Fin (Type 21) 3.4 4.3 5.2 6.2 7.0

Double Panel Double Fin (Type 22) 3.4 4.3 5.2 6.2 7.0

Dry Weight (Kg/M)300mm 400mm 500mm 600mm 700mm

Single Panel Single Fin (Type 11) 7.5 10.2 12.7 15.5 17.9

Double Panel Single Fin (Type 21) 13.4 17.9 22.2 26.7 31.1

Double Panel Double Fin (Type 22) 14.9 20.3 25.5 30.7 35.9

Water Content (L/M)300mm 400mm 500mm 600mm 700mm

Single Panel Single Fin (Type 11) 1.7 2.1 2.6 3.0 3.5

Double Panel Single Fin (Type 21) 3.4 4.3 5.2 6.2 7.0

Double Panel Double Fin (Type 22) 3.4 4.3 5.2 6.2 7.0

Dry Weight (Kg/M)300mm 400mm 500mm 600mm 700mm

Single Panel Single Fin (Type 11) 9.0 12.1 15.3 18.2 21.4

Double Panel Single Fin (Type 21) 14.7 19.5 24.5 29.2 34.3

Double Panel Double Fin (Type 22) 17.2 22.5 28.3 34.0 40.0

09

n-CoefficientsMerriott Primo Radiators

Merriott Primo Plus Radiators

n-Coefficients

Nominal Height (mm)Type 300 400 500 600 700

Single Panel Single Fin (Type 11) 1.2981 1.3026 1.307 1.3115 1.3133

Double Panel Single Fin (Type 21) 1.3091 1.3132 1.3215 1.3273 1.3388

Double Panel Double Fin (Type 22) 1.3121 1.3229 1.3444 1.3528 1.3696

n-Coefficients

Nominal Height (mm)Type 300 400 500 600 700

Single Panel Single Fin (Type 11) 1.2981 1.3026 1.3070 1.3115 1.3133

Double Panel Single Fin (Type 21) 1.2910 1.3002 1.3094 1.3186 1.3263

Double Panel Double Fin (Type 22) 1.3110 1.3217 1.3325 1.3432 1.3482

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

sales@merriottuk.comsales@merriott.ie

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