Dimplex Unvented Water Heater Benutzerhandbuch

Your water heater is made from Duplex Stainless Steel, which is

one of the toughest and best grades of steel currently available.

Each unit has been individually tested and inspected to

industry standard.

Your water heater uses advances in technology and innovative

techniques to provide you with a high performance water

heater at the best price possible.

No other type of water heater can provide all of the benefits

that can be achieved from unvented units such as the SCx

Unvented Water Heater.

UNVENTED CYLINDERS ARE DESIGNED TO BS STANDARD AND

INSTALLED TO RELEVANT BUILDING REGULATIONS

THE RELEVANT REGULATIONS ARE

ENGLAND & WALES – BUILDING REGULATION G3

SCOTLAND – TECHNICAL STANDARD P3

NORTHERN IRELAND – BUILDING REGULATION P5

AFTER INSTALLATION THE BENCHMARK LOG BOOK MUST BE

COMPLETED AND LEFT ALONG WITH THESE INSTRUCTIONS WITH

THE HOUSEHOLDER FOR FUTURE REFERENCE.

The law and unvented

p3

The benefits of unvented systems

p3

The benefits of Dimplex Unvented Water Heaters

p3

Standard energy losses

p4

What is supplied with the SCx unit?

p4

Siting the SCx Unit

p4

Check water pressure & flow rates

p4

Connecting the water supply

p5

Cold water valve

p5

Drain tap

p5

Pipework to taps

p5

Secondary circulation

p5

Wiring

p7

Fitting immersion heaters

p7

Fitting the thermal cut out & primary connections

p7

Tundish

p8

Commissioning the SCx Unit

p8

External expansion vessel

p8

Scale

p8

Draining

p8

Discharge pipework

p8

G3 Requirement

p9

Problem solving

p10

Spares

p10

Part component references

p10

Guarantee

p11

Dimensional data for DH / IDH 
range of water heaters

p3

Typical installation of a DH tank

p5

Typical installation of a IDH tank

p5

Secondary circulation connection

p6

2 x 2 port (S-plan) valve system

p6

2 port valve + 3 port mid position valve (y-plan) 

p7

Immersion heater

p7

Schematic discharge pipe arrangement

p8

●

Annual inspection as per warranty

●

Duplex Stainless Steel

●

High quality finish

●

Has one of the lowest heat losses for maximum economy

●

No sacrificial anode - low maintenance

Overall Height

Tank Height

Bottom Heater

W

ater Inlet

Twin Thermostat

Bottom Coil

To

p Coil

P & T V

alve

45

574

Note:

All External Exposed
Pipework is 22mm Diameter
316L Stainless Steel

Overall Height

Tank Height

Bottom Heater

W

ater Inlet

Top Heater

P & T V

alve

45

574

Note:

All External Exposed
Pipework is 22mm Diameter
316L Stainless Steel

It is legal to fit an Unvented Unit into any property. UK water

byelaws were amended to allow this change. There is no

longer a requirement to have an old-fashioned

“Tank-in-the-Roof ” system.

●

A real Power Shower without a noisy pump

●

No tanks in the roof – no ballcocks to jam or leak – no

noise from tank filling

●

All your water – hot and cold – is direct from the mains

●

Site the SCx unvented water heater wherever convenient

●

SCx fills your bath in minutes and will run two at the same

time (subject to good plumbing and flow rates)

●

The SCx unit works off electricity (economy 7) or any oil or

gas fired boiler (not suitable for solid fuel boilers) 

80

636

694

347

N/A

250

230

130

928

986

618

521

188

230

150

1056

1114

737

640

188

230

175 1213

1271

883

786

188

230

215

1455

1513

1108

1011

188

230

255

1723

1781

1356

1259

188

230

305

1999

2057

1613

1516

188

230

80

636

681

347

188

N/A

283

233

230

N/A

130

928

973

618

188

558

483

357

230

521

150

1056

1101

737

188

558

483

357

230

640

175

1213

1258

883

188

758

683

458

230

786

215

1455

1500

1108

188

758

683

507

230

1011

255

1723

1768

1356

188

758

683

608

230

1259

305

1999

2044

1613

188

758

683

608

230

1516

Dimp-15278-SCx_Instructions  31/3/06  9:32 am  Page 3