TECHNICAL DATA & INSTALLATION
INSTRUCTIONS FOR SCx DIRECT & INDIRECT
IMPORTANT NOTICE FOR INSTALLATION
DIMPLEX WATER HEATER SPECIFIERS GUIDE
UNVENTED WATER HEATERS
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.
READ THESE INSTALLATION AND MAINTENANCE
INSTRUCTIONS BEFORE COMMENCING
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.
INSTALLATION INSTRUCTION MANUAL
TO BE LEFT WITH THE UNIT
THE LAW AND UNVENTED
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
THE BENEFITS OF UNVENTED SYSTEMS
● 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 BENEFITS OF DIMPLEX SCx UNVENTED WATER HEATERS
●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
INSTALLATION INSTRUCTIONS
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 |
● The SCx unit works off electricity (economy 7) or any oil or |
gas fired boiler (not suitable for solid fuel boilers) |
Indirect Heat Exterior Reference Dimensions
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| 574 | Note: |
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45 |
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| All External Exposed |
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| Pipework is 22mm Diameter |
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| 316L Stainless Steel |
Secondary circulation | p5 |
Wiring | p7 |
Fitting immersion heaters | p7 |
Fitting the thermal cut out & primary connections | p7 |
Reference | Tank | Overall | P&T | Bottom | Top | Bottom | Temp | Water | Top |
Volumes | Height | Height | Valve | Heater | Coil | Coil | Monitor | In | Heater |
litres | mm | mm | mm | mm | mm | mm | mm | mm | mm |
80 | 636 | 681 | 347 | 188 | N/A | 283 | 233 | 230 | N/A |
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130 | 928 | 973 | 618 | 188 | 558 | 483 | 357 | 230 | 521 |
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Overall Height
Tank Height
Valve
Tundish | p8 |
Commissioning the SCx Unit | p8 |
External expansion vessel | p8 |
Scale | p8 |
Draining | p8 |
Discharge pipework | p8 |
G3 Requirement | p9 |
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 |
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255 | 1723 | 1768 | 1356 | 188 | 758 | 683 | 608 | 230 | 1259 |
305 | 1999 | 2044 | 1613 | 188 | 758 | 683 | 608 | 230 | 1516 |
Bottom Heater |
| Water Inlet |
| Twin Thermostat |
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Bottom Coil
Top Coil
P & T
45 |
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| 574 |
CONTENTS
SPECIFIERS GUIDE
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 |
Problem solving | p10 |
Spares | p10 |
Part component references | p10 |
Guarantee | p11 |
DIAGRAMS
Dimensional data for DH / IDH |
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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 | p6 |
2 port valve + 3 port mid position valve | p7 |
Immersion heater | p7 |
Schematic discharge pipe arrangement | p8 |
Direct Heat Exterior Reference Dimensions
Reference | Tank | Overall | P&T | Top | Bottom | Water |
Volumes | Height | Height | Valve | Heater | Heater | In |
litres | mm | mm | mm | mm | mm | mm |
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80 | 636 | 694 | 347 | N/A | 250 | 230 |
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130 | 928 | 986 | 618 | 521 | 188 | 230 |
150 | 1056 | 1114 | 737 | 640 | 188 | 230 |
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175 | 1213 | 1271 | 883 | 786 | 188 | 230 |
215 | 1455 | 1513 | 1108 | 1011 | 188 | 230 |
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255 | 1723 | 1781 | 1356 | 1259 | 188 | 230 |
305 | 1999 | 2057 | 1613 | 1516 | 188 | 230 |
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Dimensional data for Indirect Heat/Direct Heat range of water heaters
Overall Height
Tank Height
Note:
All External Exposed Pipework is 22mm Diameter 316L Stainless Steel
Heater | P & T Valve |
Top |
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Bottom Heater |
| Water Inlet |
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2 | 3 |
