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WATER Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si Installation and operating instructions Page 1 of 28 ST0109 – C 05/09
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER 0 Overall view Standard SCxn cylinder SCxn80/130/150/175/215/255/305d 04 01 02 07 SCxn80/130/150/175/215/255/305i 05 04 03 01 06 02 05 11 10 08 03 09 07 Figure 1 – Overall view of proposed installation sequence SCxn…d/i Page 2 of 28 ST0109 – C 05/09
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER SCxn175/215/255/305sd Solar SCxn cylinder 18 01 02 04 16 07 17 05 SCxn175/215/255/305si 12 06 03 13 15 14 18 01 04 02 16 17 11 08 05 10 09 12 07 03 13 14 15 Figure 2 – Overall view of proposed installation sequence SCxn…sd/si Page 3 of 28 ST0109 – C 05/09
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER 1 Contents 0 OVERALL VIEW 2 1 CONTENTS 4 2 BEFORE YOU START 5 GENERAL COMPETENCE HEALTH AND SAFETY RISK ASSESSMENT 5 5 5 6 3 SCOPE OF DELIVERY 6 4 PRODUCT FEATURES AND DESCRIPTIONS 7 5 INSTALLATION 9 5.1 GENERAL ADVICE 5.2 SITING CONSIDERATIONS 5.3 COLD WATER SUPPLY AND DISCHARGE PIPE WORK 5.4 HOT WATER OUTLET 5.5 IMMERSION HEATER 5.6 INDIRECT HEATING LOOP 5.7 SOLAR LOOP 5.8 SECONDARY RETURN 5.10 INSTALLATION EXPANSION VESSEL 5.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER 2 Before you start General Thank you for choosing a Dimplex product. We ensure you that every effort was made at design, manufacture and delivery stages of this product to meet your expectations. We ensure you of our best possible support throughout the product’s lifespan. As part of ongoing product development and improvement Dimplex reserves the right to undertake changes to the product without prior notice.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER Risk assessment The compilation of a risk assessment is strongly recommended before installing the product. The following areas require particular consideration in addition to the information required by the Health and Safety at Work Act.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER SCxn…d Expansion vessel: 18 l: 175 l, 215 l 24 l: 255 l, 305 l SCxn…i SCxn…sd SCxn…si - - x1 x1 - - x1 x1 2bar 6bar 2bar 6bar 3bar 6bar 3bar 6bar x1 x1 x1 x1 - x1 - x1 Instructions x1 x1 x1 x1 Benchmark card x1 x1 x1 x1 Expansion vessel fixing kit Inlet control group Tundish 15mm – 22mm Two port motorised valve 22mm Pres. red. Pres. rel.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER SCxn d Feature Materials - inner cylinder - outer cylinder - inlet/outlet - coils - insulation Maximum operating conditions - potable water temperature - heating water temperature - operating pressure Cold water supply - minimum dynamic pressure - maximum pressure - minimum flow rate Connections - cold water inlet - hot water outlet - secondary return - coil flow and return - sensor pocket Coil specification - surface area [m²] - rating [kW] Immersion
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER 5 Installation 5.1 General advice Please read the following section carefully before commencing installation. If in any doubt, please call the appropriate help desk. Disregarding the instructions given in this manual in its entirety and any relevant regulations, standards and codes of practice will void the guarantee of this product. Please note: the following instructions are structured in such a way that individual steps are described.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER 5.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER 5 6 It is recommended to install a drain valve in the lowest point of the cold water feed to the cylinder. This allows the cylinder to be drained in a controlled manner should this become necessary. Note: Between the inlet group and the cold water inlet on the cylinder NO isolating device should be fitted as by doing so important safety devices could be isolated! The temperature and pressure relief valve must be discharged into the tundish.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER Figure 6 – Cold water supply and discharge pipe work installation 5.4 Hot water outlet The hot water pipe work is to be directly connected to the how water outlet connections of the cylinder as indicated in Figures 1 and 2. Should a thermostatic mixing valve be required the valve is to be installed following the manufacturers instructions.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER Note: The cylinder must be filled with water before switching on the immersion heater. Failure to do so will damage the element and void any guarantee on the product. 5.6 Indirect heating loop The indirect heating source can be connected to the cylinder in various ways as described by the chosen control system supplier. The wiring and installation principles for two typical integration methods are detailed in chapter 5.11.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER The port connections for the indirect heating flow and return are identified in Figure 1 for the SCxn…i range and in Figure 2 for the SCxn…si range. Should the flow connection be the highest point in the indirect heating loop an adequate device for de-aeration has to be installed. Equally, should the return connection be the lowest point in the indirect heating loop, a suitable drain device should be installed in the lowest point.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER The wiring schematic for the solar loop is detailed in chapter 5.12.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER Figure 10 – Installation expansion vessel (optional for standard SCxn d/i cylinders, mandatory for solar SCxn d/I cylinders) It is important to check the pre-charge pressure of the expansion vessel membrane before filling the cylinder. The pre-charge should be >2bar. 5.11 Wiring schematic auxiliary loop The auxiliary heating system can be interfaced with the Dimplex SCxn cylinder in various. Two common examples are given in Figures 11 and 12.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER Figure 11 – Auxiliary loop integration 2x motorised two port valve Page 17 of 28 ST0109 – C 05/09
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER Figure 12 - Auxiliary loop integration 1x motorised two port valve and mid-position valve Page 18 of 28 ST0109 – C 05/09
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER 5.12 Wiring schematic solar loop The integration of the Dimplex solar SCxn cylinder is shown in Figures 11 and 12. The wiring schematic for the solar loop is shown in Figure 13. Figure 13 – Solar loop integration 5.13 Solar sensor installation The Dimplex solar SCxn range cylinders allow for the installation of two sensors. The lower sensor is required to control the solar circulation pump.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER 03 01 02 Figure 14 – Solar sensor boss positions and sensor installation Page 20 of 28 ST0109 – C 05/09
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER 6 Commissioning The following commissioning procedure only details the required steps to be taken for the potable water loop and not for the direct heating, auxiliary or solar loops. Please refer to relevant manuals for these operations. 6.1 SCxn … d/i range 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Check all connections and joints to ensure they have been tightened and secured correctly.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER 4 5 6 7 8 9 10 11 12 Turn on the supply to the cylinder and fill until water runs from the open hot water tap. Close the hot water tap. Check all joints for leaks, even those not having been altered especially when replacing a vented cylinder. Open temperature and pressure relief valve to ensure proper discharge and check after closing that valve is not dripping.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER The hot water temperature achieved by the direct electric heating element can be adjusted by removing the cover from the immersion heater and adjusting the dial up or down as indicated in Figure 15. 7.2 Water temperature auxiliary heating The water temperature achieved by the auxiliary heating system depends on the setting of the thermostat on: - the cylinder AND - the auxiliary heating source.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER 9 Troubleshooting Fault A No water from hot water taps B No hot water Cause A.1 Stop valve closed A.2 Strainer blocked A.3 Pressure reducing valve fitted against flow B.1 Timer/Programmer not set correctly B.2 Auxiliary heating mal function B.3 Direct heating mal function C Intermittent water discharge through tundish on warm-up D Continuous discharge B.4 Auxiliary/direct heating high limit thermostat has tripped C.1 Bubble depleted C.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER 10 Technical data 10.1 SCxn … d/i F G [mm] H [mm] I [mm] d i SCxn 80 27 29 B B A Capacity Weight [kg] Heat loss [kWh] Heat up [mns] Re-heat [mns] A [mm] B [mm] C [mm] D [mm] E [mm] F [mm] A/I G H C D D E E F 130 30 32 150 32 35 175 37 40 215 43 48 255 50 55 305 59 65 d/i 1.12 1.50 1.82 2.10 2.59 2.73 2.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER 10.2 SCxn … sd/si Capacity Weight [kg] Heat loss [kWh] Heat up [mns] Re-heat [mns] A [mm] B [mm] C [mm] D/N/P [mm] E [mm] F [mm] G [mm] H [mm] I [mm] J [mm] K [mm] L/0 [mm] M [mm] Aux. vol. [l] O J A L B K I G H M C P D/N E F SCxn 175 sd si sd/si sd si sd si sd/si sd/si sd sd/si sd/si sd/si si si si sd/si sd/si sd/si sd si sd si 44 48 1.78 20 18 14 13 215 255 52 56 2.19 24 22 17 18 305 59 63 2.31 29 25 20 19 69 73 2.
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER Page 27 of 28 ST0109 – C 05/09
Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si WATER Dimplex UK Limited Millbrook House Grange Drive, Hedge End, Southampton SO30 2DF Te.: 01489 773 052, Fax.: 01489 773 061 e-mail: customer.services@dimplex.co.uk www.dimplex.co.
