Dimp-15278-SCx_Instructions 31/3/06 9:32 am Page 1 DIMPLEX UNVENTED WATER HEATERS INSTALLATION MANUAL Marketing Department, Millbrook House, Grange Drive, Hedge End, Southampton, SO30 2DF.
Dimp-15278-SCx_Instructions 31/3/06 9:32 am Page 3 DIMPLEX WATER HEATER SPECIFIERS GUIDE TECHNICAL DATA & INSTALLATION INSTRUCTIONS FOR SCx DIRECT & INDIRECT UNVENTED WATER HEATERS IMPORTANT NOTICE FOR INSTALLATION Your water heater is made from Duplex Stainless Steel, which is one of the toughest and best grades of steel currently available.
Dimp-15278-SCx_Instructions 31/3/06 9:32 am Page 5 ● 1 Element on IDH indirect models up to 305 litres and 80 STANDARD ENERGY LOSSES litre DH direct model The heat loss of each SCx Unvented Unit while maintaining the temperature of the stored water at 65 degrees Celsius. (See performance table below). 1) Tests carried out by BBA. Slight variations may occur with changes to water mains supply pressure ● 2 Elements on DH direct models from 130 up to 305 litres.
Dimp-15278-SCx_Instructions 31/3/06 9:32 am Page 7 2 PORT VALVE + 3 PORT MID POSITION VALVE (Y-PLAN) SYSTEM GUIDANCE LAYOUT ONLY SECONDARY CIRCULATION CONNECTION DIAGRAM Fig.5 Fig.3 WIRING As our heating element is Incoloy 825 and is fitted with a cut- All electrical wiring should be carried out by a registered electrical out and thermostat for safety, a non-standard 13/4" boss is fitted contractor and must conform to the latest IEE wiring regulations to the unit.
Dimp-15278-SCx_Instructions 31/3/06 9:32 am Page 9 TUNDISH DRAINING G3 REQUIREMENT standings, grassed areas etc. are acceptable providing The tundish supplied must be fitted visible to the occupier. The Switch off electrical power to immersion heaters and/or shut ‘…there shall be precautions…to ensure that the hot water that where children may play or otherwise come into discharge pipe must be 22mm copper pipe. Regulations do down the boiler. Close the stopcock valve to isolate the SCx unit.
Dimp-15278-SCx_Instructions 31/3/06 9:32 am Page 11 TABLE 1 – SIZING OF COPPER DISCHARGE PIPE (D2) FOR COMMON T&P RELIEF VALVE SIZES Valve outlet Size Minimum size of discharge pipe D1 G1/2 G3/4 G1 Minimum size of discharge pipe D2 from tundish 15mm 22mm 28mm Maximum resistance allowed, expressed as a length of straight pipe (i.e. no elbows or bends) Resistance created by each elbow or bend 22mm up to 9m 0.8m 28mm up to 18m 1.0m 35mm up to 27m 1.4m 28mm up to 9m 1.