01

PROTECTALST RANGE

www.merriottuk.com www.merriott.ie

Revision: December 2019

02

PAGE 03PROTECTA RANGE SUMMARY

PAGE 04-07PROTECTA RANGE SPECIFICATIONS

PAGE 08PRESSURE DROP

PAGE 09MOUNTING DETAILS

03

PROTECTA RANGESUMMARYDESIGNED SPECIFICALLY FOR HOMES AND OTHER BUILDINGSFREQUENTED BY CHILDREN, ELDERLY PEOPLE AND VULNERABLE ADULTS, OUR PROTECTA RANGE PUTS HEALTH AND SAFETY AT THE TOP OF THE AGENDA. IN FACT, THEY CONFORM WITH NHS GUIDELINES FOR ‘SAFE HOT WATER & SURFACE TEMPERATURE’ AND HSE HEALTH SERVICES INFORMATION SHEET ‘MANAGING THE RISKS FROM HOT WATER AND SURFACES IN HEALTH AND SOCIAL CARE’ FOR USE IN SCHOOLS, HOSPITALS AND OTHER HEALTHCARE FACILITIES.

MANUFACTUREDIN BRITAIN

NHS SURFACETEMP COMPLIANT

<43°c

CURVED EDGESFOR SAFETY

98 SIZEOPTIONS

10 YEARWARRANTY

LOCKABLECOVER

EMITTER:

Seam Top RadiatorHORIZONTAL4 heights: 300mm, 400mm, 600mm, 700mm3 types: T11, T21, T2210 lengths: 400mm, 500mm, 600mm, 700mm, 800mm, 1000mm, 1200mm, 1400mm, 1600mm, 1800mm

COVER:

HORIZONTAL 4 heights: 572mm, 672mm, 872mm, 972mm3 types: T11 (107mm wide), T21 (127mm wide), T22 (157mm wide)10 lengths: 420mm, 600mm, 800mm, 1000mm, 1200mm, 1400mm, 1600mm, 1800mm, 2000mm, 2200mm

VERTICAL2 heights: 1772mm, 2072mm1 type: T224 lengths: 420mm, 570mm, 720mm, 870mm

ACCESSORIES:

HORIZONTALDirect Fit TRV Kit Product Code: MERRDIRFIT

Universal Close Coupled TRV Product Code: MERRCLOSECOUP

VERTICALDirect Fit TRV Kit Product Code: MERRDIRFIT

Universal Close Coupled TRV Product Code: MERRCLOSECOUP

LST RANGESPECIFICATIONS

04

EMITTER:

The Protecta LST cover is designed to accommodate a standard seam top emitter, easy to clean with no sharp edges. Recommended connection configuration for NHS applications is bottom opposite end (BOE). All standard connections are ½” BSP.

COVER:

Protecta LST cover comprises of a strong single piece 1.2mm thick steel casing that is quick and easy to install. The casing can be easily lifted on and off for fitting and cleaning. The cover is secured to the brackets on each side via obscured screws. There is a simple locking device to prevent unauthorised access. All external surfaces are flat wipe clean surfaces, all external corners are rounded, eliminating sharp edges to prevent injury.

OUTPUTS:

All radiators have been manufactured and independently tested by an EN442 accredited test laboratory to BS EN442 and fully comply with the NHS Estates Health Guidance notes for ‘Safe Hot Water and Surface Temperature’ and HSE health services information sheet ‘Managing the risks from hot water and surfaces in health and social care’ with a maximum surface temperature below 43˚C at a maximum flow temperature of 80˚C / 60˚C return or 75˚C flow / 65˚C return.

COLOUR:

All radiators are de-greased, phosphated and primer coated. An epoxy polyester finishing coat in white (RAL 9016) is applied to all front and rear surfaces.

ANTI-BACTERIAL PAINT:

Coating to suppress bacterial growth..

PACKAGING:

The Protecta LST is supplied as a Single Package including the Emitter and Casing. The casing is packaged in heavy duty cardboard with internal polystyrene support for complete protection. The Emitter is fully packaged with cardboard, plastic corner protection, and fully shrink wrapped and placed inside the casings.

QUALITY:

All radiators carry the BS Kitemark and CE Mark. Produced under a quality management system - ISO 9001:2015, environmental management system - ISO 14001:2015 and Occupational health and safety management system - ISO 45001:2018.

WARRANTY:

All radiators are supplied under warranty for a period of 10 years in respect of defective materials or manufacture. The standard conditions of sale apply to all transactions. A copy is available on request.

05

TESTING:

All radiators are individually high pressure tested to 10.5 bar and are suitable for a working pressure of up to 8 bar.

CONNECTIONS:

4 x 1/2” BSP. Plug and Air Vents included. Vertical emitters are centre tapped.

WALL BRACKETS:

All radiators in the range are supplied with two or more brackets depending on the length of the emitter. The LST cover is fitted onto the casing backets via two small slots then held by two small screws.

Brackets supplied with the radiator provide a clearance of: 46mm - Single emitter 62mm - Double emitter single fin 68mm - Vertical double emitter double fin 78mm - Double emitter double fin (stated from the center of the valves).

INSTALLATION:

For indirect or closed circuits only with a maximum working temperature of 80˚C. The system should be designed in accordance with the British Standard Code of Practice for Water Based Heating Systems in Buildings BS EN 128:2012+A1:2014 and BS EN 12831: 2003. The installation of the system 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 the Building Regulations and Good Practice Guidance for Scotland. Merriott strongly recommend the use of corrosion inhibitor for all applications. Failure to observe these standards may invalidate the manufacturer’s warranty. Single feed indirect cylinders are not recommended as the possibility of aeration due to water interchange may lead to corrosion.

TAPPING TO TAPPING DIMENSIONS:

Tapping dimensions are the nominal length of the emitter.

THERMOSTATIC RADIATOR VALVES:

Direct Fit Kit: 15mm Angled TRV body, the TRV is fitted to the radiator through the 38mm casing knockout via the extension adaptor. Suitable for TBOE connection only. Not suitable for the Vertical LST, or 420mm wide LST.

Universal Close Coupled Kit: 15mm Straight TRV Body, the TRV connects directly to the casing via the 23mm knockout and is connected to the TRV body by capillary tube.

COVER HEIGHT (MM)

COVER LENGTH (MM)

BTU/HR∆T50

WATTS∆T50

DRY WEIGHT (KG)

WATER CONTENT (L)

Sing

le E

mitt

er

572 800 946 277 12.10 1.02

572 1,000 1261 370 15.22 1.36

572 1,200 1576 462 18.45 1.70

572 1,400 1890 554 21.63 2.04

572 1,600 2207 647 24.80 2.38

572 1,800 2521 739 27.94 2.72

572 2,000 2837 832 31.07 3.06

Doub

le E

mitt

er(d

oubl

e fin

)

572 800 1861 545 17.92 2.04

572 1,000 2481 727 22.70 2.72

572 1,200 3102 909 27.50 3.40

572 1,400 3722 1091 32.31 4.08

572 1,600 4342 1273 37.12 4.76

572 1,800 4961 1454 41.80 5.44

572 2,000 5583 1636 46.74 6.12

Sing

le E

mitt

er

672 420 621 182 7.43 0.63

672 600 830 243 11.02 0.84

672 800 1245 365 14.90 1.26

672 1,000 1660 486 18.80 1.68

672 1,200 2074 608 22.69 2.10

672 1,400 2489 730 26.62 2.52

672 1,600 2904 851 30.56 2.94

672 1,800 3319 973 34.53 3.36

672 2,000 3734 1094 38.40 3.78

672 2,200 4149 1216 42.27 4.20

Doub

le E

mitt

er(s

ingl

e fin

)

672 600 1211 355 14.63 1.72

672 800 1815 532 19.96 2.58

672 1,000 2423 710 25.30 3.44

672 1,200 3026 887 30.84 4.30

672 1,400 3630 1064 36.27 5.16

672 1,600 4238 1242 41.74 6.02

672 1,800 4842 1419 47.03 6.88

672 2,000 5449 1597 53.19 7.74

672 2,200 6053 1774 58.38 8.60

Doub

le E

mitt

er(d

oubl

e fin

)

672 420 1198 351 10.61 1.29

672 600 1597 468 16.28 1.72

672 800 2395 702 22.36 2.58

672 1,000 3194 936 28.44 3.44

672 1,200 3992 1170 34.52 4.30

672 1,400 4790 1404 40.61 5.16

672 1,600 5589 1638 46.74 6.02

672 1,800 6387 1872 52.88 6.88

672 2,000 7186 2106 58.94 7.74

672 2,200 7984 2340 65.00 8.60

COVER HEIGHT

SINGLE EMITTER DOUBLE EMITTER (SINGLE FIN)

DOUBLE EMITTER (DOUBLE FIN)

(mm) Exponent ‘n’ Exponent ‘n’ Exponent ‘n’

572 1.3047 - 1.3121

672 1.3027 1.2808 1.3229

872 1.3093 1.2640 1.3444

972 1.3178 - 1.3528

DESCRIPTION

DIRECT FIT TRV KIT

UNIVERSAL CLOSE COUPLED TRV

PROTECTA LST RANGE BY EMITTER TYPE

‘N’ COEFFICIENT VALUES VALVES

06

COVER HEIGHT (MM)

COVER LENGTH (MM)

BTU/HR∆T50

WATTS∆T50

DRY WEIGHT (KG)

WATER CONTENT (L)

Sing

le E

mitt

er872 420 904 265 10.15 0.90

872 600 1205 353 15.32 1.20

872 800 1808 530 20.90 1.80

872 1,000 2410 706 26.50 2.40

872 1,200 3013 883 32.09 3.00

872 1,400 3615 1060 37.73 3.60

872 1,600 4218 1236 43.37 4.20

872 1,800 4820 1413 49.04 4.80

872 2,000 5423 1589 54.62 5.40

872 2,200 6026 1766 60.20 6.00

Doub

le E

mitt

er(s

ingl

e fin

)

872 600 1648 483 20.39 2.48

872 800 2474 725 28.51 3.72

872 1,000 3296 966 35.96 4.96

872 1,200 4122 1208 43.88 6.20

872 1,400 4947 1450 51.46 7.44

872 1,600 5770 1691 60.07 8.68

872 1,800 6595 1933 67.42 9.92

872 2,000 7418 2174 75.03 11.16

872 2,200 8243 2416 83.21 12.40

Doub

le E

mitt

er(d

oubl

e fin

)

872 420 1686 494 14.78 1.86

872 600 2249 659 23.04 2.48

872 800 3374 989 31.88 3.72

872 1,000 4498 1318 40.72 4.96

872 1,200 5623 1648 49.59 6.20

872 1,400 6748 1978  58.44 7.44

872 1,600 7872 2307 67.33 8.68

872 1,800 8997 2637 76.24 9.92

872 2,000 10121 2966 85.06 11.16

872 2,200 11245 3296 93.88 12.40

Sing

le E

mitt

er

972 420 1037 304 11.36 1.05

972 600 1383 405 17.22 1.40

972 800 2074 608 23.53 2.10

972 1,000 2765 810 29.88 2.80

972 1,200 3456 1013 36.21 3.50

972 1,400 4148 1216 42.57 4.20

972 1,600 4839 1418 48.94 4.90

972 1,800 5530 1621 55.34 5.60

972 2,000 6220 1823 61.74 6.30

Doub

le E

mitt

er(d

oubl

e fin

)

972 420 1911 560 16.62 2.10

972 600 2548 747 26.07 2.80

972 800 3822 1120 36.18 4.20

972 1,000 5096 1494 46.32 5.60

972 1,200 6370 1867 56.45 7.00

972 1,400 7644 2240 66.57 8.40

972 1,600 8918 2614 76.73 9.80

972 1,800 10192 2987 86.91 11.20

972 2,000 11468 3361 97.09 12.60

Doub

le

Emitt

er(d

oubl

e fin

) 1772 420 2768 811 55.26 5.90

1772 570 4152 1217 69.89 8.85

1772 720 5537 1623 84.78 11.80

1772 870 6921 2028 99.25 14.75

Doub

le

Emitt

er(d

oubl

e fin

) 2072 420 3054 895 61.08 6.48

2072 570 4579 1342 77.14 9.72

2072 720 6104 1789 90.50 12.96

2072 870 7633 2237 105.87 16.20

PROTECTA LST RANGE BY EMITTER TYPE (CONTINUED)

07

08

PRIMO TYPE 11, 21 AND 22 - PRESSURE DROP (HORIZONTAL)

PRIMO TYPE 22 - PRESSURE DROP (VERTICAL)

Pres

sure

Dro

p (k

Pa)

Flow Rate (L/s)

3.50

3.00

2.50

2.00

1.50

1.00

0.50

0.00

Type 11

Type 21 & 22

0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10

To calculate flowrates in Kg/hr: Output (Watts) / 4.19KJ/Kg/k (Specific heat capacity of water / ˚C) / Temp. Drop (˚C) x 3.6 E.g. 1000W / 4.19 / 10 x 3.6 = 85.92 Kg/hr Useful Conversion Factors: 1 g/s = 3.6 L/hr 1 L/hr = 1 Kg/hr 1 mbar = 100 pa 1mm/watergauge = 9.81 pa

To calculate pressure drop in kPa: Δp= K x (qmd) where Δp = pressure drop (kPa) K = constant from equations below qm = flowrate (Kg/hr) d = index from graph

Horizontal

1. Type 11 2. Type 21 & 22DP = 416.75 x Q2.1018 DP = 209.96 x Q2.3446

Vertical

1. Type 22DP = 210.86 x Q1.9587

DETERMINATION OF PRESSURE DROP IN RADIATORSPr

essu

re D

rop

(kPa

)

Flow Rate (L/s)

Type

22V

Kv =

2.30

5000

4000

3000

2000

1000900800700600500

400

300

200

10050 60 70 80 90 100 200 300 400 500 600

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MOUNTING DETAILS

NOTE:

It is advisable to leave a further 5mm clearance above any final floor covering to allow for easy fitting and removal.

ENCLOSURE HEIGHT A (MM)

EMITTER HEIGHT B (MM)

572 300

672 400

872 600

972 700

Floor Level

Heat Emi�er

235

135

6S, 6

SX, 6

SP, 9

S &

9SP

5S, 5

SP, 8

S, 8

SX &

8SP

20

Encl

osur

e he

ight

'A'

Emitt

er h

eigh

t 'B'

20

100 100

84.5

SX = 100S = 83

SP = 100SX = 100

S = 83

SP = 10060*60*

LOOKING TOWARDS WALL LST SUPER SIDE ELEVATION

212

9S =

650

5S =

250

6S =

350

8S =

550

107

46

55

114

34

LST SUPER PLUS SIDE ELEVATION

212

9SP

= 65

0

5SP

= 25

06S

P =

350

8SP

= 55

0

157

78

55

114

34 LST EXTRA SIDE ELEVATION

212

6SX

= 35

08S

X =

550

127

62

55

114

34

Floor Level

Heat Emi�er

235

135

6S, 6

SX, 6

SP, 9

S &

9SP

5S, 5

SP, 8

S, 8

SX &

8SP

20

Encl

osur

e he

ight

'A'

Emitt

er h

eigh

t 'B'

20

100 100

84.5

SX = 100S = 83

SP = 100SX = 100

S = 83

SP = 10060*60*

LOOKING TOWARDS WALL LST SUPER SIDE ELEVATION

212

9S =

650

5S =

250

6S =

350

8S =

550

107

46

55

114

34

LST SUPER PLUS SIDE ELEVATION

212

9SP

= 65

0

5SP

= 25

06S

P =

350

8SP

= 55

0

157

78

55

114

34

LST EXTRA SIDE ELEVATION

212

6SX

= 35

08S

X =

550

127

62

55

114

34

TYPE 11 TYPE 21 TYPE 22

*60mm for the 420mm wide version.

10

A

1772

B

60 60

68

1500

76

196D

C

157

A

2072

B

60 60

1800

76

196D

C

A

1772

B

60 60

68

1500

76

196D

C

157

A

2072

B

60 60

1800

76

196D

C

A

1772

B

60 60

68

1500

76

196D

C

157

A

2072

B

60 60

1800

76

196D

C

NB: All measurements are nominal.

BRACKET POSITIONS AND DIMENSIONS

NOTE:

It is advisable to leave a further 5mm clearance above any final floor covering to allow for easy fitting and removal.

CASING WIDTH A (MM)

RADIATOR WIDTH B (MM)

CENTRE CONNECTIONS C (MM)

LEFT-RIGHT CONNECTIONS D (MM)

420 300 50 244

570 450 50 394

720 600 50 544

870 750 50 694

11

NOTES

Merriott 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.ie

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